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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>StunAgent: libnice Reference Manual</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
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</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle">
<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
                  <a href="#libnice-StunAgent.description" class="shortcut">Description</a></span>
</td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
<td><a accesskey="u" href="ch03.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
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<td><a accesskey="n" href="libnice-StunMessage.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td>
</tr></table>
<div class="refentry">
<a name="libnice-StunAgent"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="libnice-StunAgent.top_of_page"></a>StunAgent</span></h2>
<p>StunAgent — STUN agent for building and validating STUN messages</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="libnice-StunAgent.stability-level"></a><h2>Stability Level</h2>
<acronym title="The intention of a Stable interface is to enable arbitrary third parties to
develop applications to these interfaces, release them, and have confidence that
they will run on all minor releases of the product (after the one in which the
interface was introduced, and within the same major release). Even at a major
release, incompatible changes are expected to be rare, and to have strong
justifications.
"><span class="acronym">Stable</span></acronym>, unless otherwise indicated
</div>
<div class="refsect1">
<a name="libnice-StunAgent.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<span class="returnvalue">bool</span>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="libnice-StunAgent.html#StunMessageIntegrityValidate" title="StunMessageIntegrityValidate ()">*StunMessageIntegrityValidate</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="libnice-StunAgent.html#StunDebugHandler" title="StunDebugHandler ()">*StunDebugHandler</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="libnice-StunAgent.html#stun-agent-init" title="stun_agent_init ()">stun_agent_init</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="libnice-StunAgent.html#StunValidationStatus" title="enum StunValidationStatus"><span class="returnvalue">StunValidationStatus</span></a>
</td>
<td class="function_name">
<a class="link" href="libnice-StunAgent.html#stun-agent-validate" title="stun_agent_validate ()">stun_agent_validate</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">bool</span>
</td>
<td class="function_name">
<a class="link" href="libnice-StunAgent.html#stun-agent-default-validater" title="stun_agent_default_validater ()">stun_agent_default_validater</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">bool</span>
</td>
<td class="function_name">
<a class="link" href="libnice-StunAgent.html#stun-agent-init-request" title="stun_agent_init_request ()">stun_agent_init_request</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">bool</span>
</td>
<td class="function_name">
<a class="link" href="libnice-StunAgent.html#stun-agent-init-indication" title="stun_agent_init_indication ()">stun_agent_init_indication</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">bool</span>
</td>
<td class="function_name">
<a class="link" href="libnice-StunAgent.html#stun-agent-init-response" title="stun_agent_init_response ()">stun_agent_init_response</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">bool</span>
</td>
<td class="function_name">
<a class="link" href="libnice-StunAgent.html#stun-agent-init-error" title="stun_agent_init_error ()">stun_agent_init_error</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">size_t</span>
</td>
<td class="function_name">
<a class="link" href="libnice-StunAgent.html#stun-agent-build-unknown-attributes-error" title="stun_agent_build_unknown_attributes_error ()">stun_agent_build_unknown_attributes_error</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">size_t</span>
</td>
<td class="function_name">
<a class="link" href="libnice-StunAgent.html#stun-agent-finish-message" title="stun_agent_finish_message ()">stun_agent_finish_message</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">bool</span>
</td>
<td class="function_name">
<a class="link" href="libnice-StunAgent.html#stun-agent-forget-transaction" title="stun_agent_forget_transaction ()">stun_agent_forget_transaction</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="libnice-StunAgent.html#stun-agent-set-software" title="stun_agent_set_software ()">stun_agent_set_software</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="libnice-StunAgent.html#stun-debug-enable" title="stun_debug_enable ()">stun_debug_enable</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="libnice-StunAgent.html#stun-debug-disable" title="stun_debug_disable ()">stun_debug_disable</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="libnice-StunAgent.html#stun-set-debug-handler" title="stun_set_debug_handler ()">stun_set_debug_handler</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="libnice-StunAgent.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="typedef_keyword">typedef</td>
<td class="function_name"><a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent">StunAgent</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="libnice-StunAgent.html#StunCompatibility" title="enum StunCompatibility">StunCompatibility</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="libnice-StunAgent.html#StunAgentUsageFlags" title="enum StunAgentUsageFlags">StunAgentUsageFlags</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="libnice-StunAgent.html#StunValidationStatus" title="enum StunValidationStatus">StunValidationStatus</a></td>
</tr>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="libnice-StunAgent.html#StunDefaultValidaterData" title="StunDefaultValidaterData">StunDefaultValidaterData</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="libnice-StunAgent.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;stun/stunagent.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="libnice-StunAgent.description"></a><h2>Description</h2>
<p>The STUN Agent allows you to create and validate STUN messages easily.
It's main purpose is to make sure the building and validation methods used
are compatible with the RFC you create it with. It also tracks the transaction
ids of the requests you send, so you can validate if a STUN response you
received should be processed by that agent or not.</p>
</div>
<div class="refsect1">
<a name="libnice-StunAgent.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="StunMessageIntegrityValidate"></a><h3>StunMessageIntegrityValidate ()</h3>
<pre class="programlisting"><span class="returnvalue">bool</span>
<span class="c_punctuation">(</span>*StunMessageIntegrityValidate<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a> *agent</code></em>,
                                 <em class="parameter"><code><a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> *message</code></em>,
                                 <em class="parameter"><code><span class="type">uint8_t</span> *username</code></em>,
                                 <em class="parameter"><code><span class="type">uint16_t</span> username_len</code></em>,
                                 <em class="parameter"><code><span class="type">uint8_t</span> **password</code></em>,
                                 <em class="parameter"><code><span class="type">size_t</span> *password_len</code></em>,
                                 <em class="parameter"><code><span class="type">void</span> *user_data</code></em>);</pre>
<p>This is the prototype for the <em class="parameter"><code>validater</code></em>
 argument of the <a class="link" href="libnice-StunAgent.html#stun-agent-validate" title="stun_agent_validate ()"><code class="function">stun_agent_validate()</code></a>
function.</p>
<p> See also: <a class="link" href="libnice-StunAgent.html#stun-agent-validate" title="stun_agent_validate ()"><code class="function">stun_agent_validate()</code></a> </p>
<div class="refsect3">
<a name="StunMessageIntegrityValidate.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>agent</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> being validated</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>username</p></td>
<td class="parameter_description"><p>The username found in the <em class="parameter"><code>message</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>username_len</p></td>
<td class="parameter_description"><p>The length of <em class="parameter"><code>username</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>password</p></td>
<td class="parameter_description"><p>The password associated with that username. This argument is a
pointer to a byte array that must be set by the validater function.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>password_len</p></td>
<td class="parameter_description"><p>The length of <em class="parameter"><code>password</code></em>
which must also be set by the
validater function.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>Data to give the function</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="StunMessageIntegrityValidate.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the authentication was successful,
<a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> if the authentication failed</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="StunDebugHandler"></a><h3>StunDebugHandler ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
<span class="c_punctuation">(</span>*StunDebugHandler<span class="c_punctuation">)</span> (<em class="parameter"><code>const <span class="type">char</span> *format</code></em>,
                     <em class="parameter"><code><span class="type">va_list</span> ap</code></em>);</pre>
<p>Callback for a debug message from the STUN code.</p>
<div class="refsect3">
<a name="StunDebugHandler.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>printf()-style debug message format string</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>ap</p></td>
<td class="parameter_description"><p>Parameters to substitute into message placeholders</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="stun-agent-init"></a><h3>stun_agent_init ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
stun_agent_init (<em class="parameter"><code><a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a> *agent</code></em>,
                 <em class="parameter"><code>const <span class="type">uint16_t</span> *known_attributes</code></em>,
                 <em class="parameter"><code><a class="link" href="libnice-StunAgent.html#StunCompatibility" title="enum StunCompatibility"><span class="type">StunCompatibility</span></a> compatibility</code></em>,
                 <em class="parameter"><code><a class="link" href="libnice-StunAgent.html#StunAgentUsageFlags" title="enum StunAgentUsageFlags"><span class="type">StunAgentUsageFlags</span></a> usage_flags</code></em>);</pre>
<p>This function must be called to initialize an agent before it is being used.</p>
<div class="note">
<p>
    The <em class="parameter"><code>known_attributes</code></em> data must exist in memory as long as the <em class="parameter"><code>agent</code></em> is used
    </p>
<p>
    If the <a class="link" href="libnice-StunAgent.html#STUN-AGENT-USAGE-SHORT-TERM-CREDENTIALS:CAPS"><span class="type">STUN_AGENT_USAGE_SHORT_TERM_CREDENTIALS</span></a> and
    <a class="link" href="libnice-StunAgent.html#STUN-AGENT-USAGE-LONG-TERM-CREDENTIALS:CAPS"><span class="type">STUN_AGENT_USAGE_LONG_TERM_CREDENTIALS</span></a> usage flags are not set, then the
    agent will default in using the short term credentials mechanism
    </p>
<p>
    The <a class="link" href="libnice-StunAgent.html#STUN-AGENT-USAGE-USE-FINGERPRINT:CAPS"><span class="type">STUN_AGENT_USAGE_USE_FINGERPRINT</span></a> and <a class="link" href="libnice-StunAgent.html#STUN-AGENT-USAGE-ADD-SOFTWARE:CAPS"><span class="type">STUN_AGENT_USAGE_ADD_SOFTWARE</span></a>
    usage flags are only valid if the <a class="link" href="libnice-StunAgent.html#STUN-COMPATIBILITY-RFC5389:CAPS"><span class="type">STUN_COMPATIBILITY_RFC5389</span></a> or
    <a class="link" href="libnice-StunAgent.html#STUN-COMPATIBILITY-MSICE2:CAPS"><span class="type">STUN_COMPATIBILITY_MSICE2</span></a> <em class="parameter"><code>compatibility</code></em> is used
    </p>
</div>
<div class="refsect3">
<a name="stun-agent-init.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>agent</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a> to initialize</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>known_attributes</p></td>
<td class="parameter_description"><p>An array of <span class="type">uint16_t</span> specifying which attributes should
be known by the agent. Any STUN message received that contains a mandatory
attribute that is not in this array will yield a
<a class="link" href="libnice-StunAgent.html#STUN-VALIDATION-UNKNOWN-REQUEST-ATTRIBUTE:CAPS"><span class="type">STUN_VALIDATION_UNKNOWN_REQUEST_ATTRIBUTE</span></a> or a
<a class="link" href="libnice-StunAgent.html#STUN-VALIDATION-UNKNOWN-ATTRIBUTE:CAPS"><span class="type">STUN_VALIDATION_UNKNOWN_ATTRIBUTE</span></a> error when calling <a class="link" href="libnice-StunAgent.html#stun-agent-validate" title="stun_agent_validate ()"><code class="function">stun_agent_validate()</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>compatibility</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunAgent.html#StunCompatibility" title="enum StunCompatibility"><span class="type">StunCompatibility</span></a> to use for this agent. This will affect
how the agent builds and validates the STUN messages</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>usage_flags</p></td>
<td class="parameter_description"><p>A bitflag using <a class="link" href="libnice-StunAgent.html#StunAgentUsageFlags" title="enum StunAgentUsageFlags"><span class="type">StunAgentUsageFlags</span></a> values to define which
STUN usages the agent should use.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="stun-agent-validate"></a><h3>stun_agent_validate ()</h3>
<pre class="programlisting"><a class="link" href="libnice-StunAgent.html#StunValidationStatus" title="enum StunValidationStatus"><span class="returnvalue">StunValidationStatus</span></a>
stun_agent_validate (<em class="parameter"><code><a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a> *agent</code></em>,
                     <em class="parameter"><code><a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> *msg</code></em>,
                     <em class="parameter"><code>const <span class="type">uint8_t</span> *buffer</code></em>,
                     <em class="parameter"><code><span class="type">size_t</span> buffer_len</code></em>,
                     <em class="parameter"><code><a class="link" href="libnice-StunAgent.html#StunMessageIntegrityValidate" title="StunMessageIntegrityValidate ()"><span class="type">StunMessageIntegrityValidate</span></a> validater</code></em>,
                     <em class="parameter"><code><span class="type">void</span> *validater_data</code></em>);</pre>
<p>This function is used to validate an inbound STUN message and transform its
data buffer into a <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a>. It will take care of various validation
algorithms to make sure that the STUN message is valid and correctly
authenticated.</p>
<p> See also: <a class="link" href="libnice-StunAgent.html#stun-agent-default-validater" title="stun_agent_default_validater ()"><code class="function">stun_agent_default_validater()</code></a> </p>
<div class="refsect3">
<a name="stun-agent-validate.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>agent</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>msg</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> to build</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>buffer</p></td>
<td class="parameter_description"><p>The data buffer of the STUN message</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>buffer_len</p></td>
<td class="parameter_description"><p>The length of <em class="parameter"><code>buffer</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>validater</p></td>
<td class="parameter_description"><p>A <a class="link" href="libnice-StunAgent.html#StunMessageIntegrityValidate" title="StunMessageIntegrityValidate ()"><span class="type">StunMessageIntegrityValidate</span></a> function callback that will
be called if the agent needs to validate a MESSAGE-INTEGRITY attribute. It
will only be called if the agent finds a message that needs authentication
and a USERNAME is present in the STUN message, but no password is known.
The validater will not be called if the <a class="link" href="libnice-StunAgent.html#STUN-AGENT-USAGE-IGNORE-CREDENTIALS:CAPS"><span class="type">STUN_AGENT_USAGE_IGNORE_CREDENTIALS</span></a>
usage flag is set on the agent, and it will always be called if the
<a class="link" href="libnice-StunAgent.html#STUN-AGENT-USAGE-FORCE-VALIDATER:CAPS"><span class="type">STUN_AGENT_USAGE_FORCE_VALIDATER</span></a> usage flag is set on the agent.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>validater_data</p></td>
<td class="parameter_description"><p>A user data to give to the <em class="parameter"><code>validater</code></em>
callback when it gets
called.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="stun-agent-validate.returns"></a><h4>Returns</h4>
<p> A <a class="link" href="libnice-StunAgent.html#StunValidationStatus" title="enum StunValidationStatus"><span class="type">StunValidationStatus</span></a></p>
<div class="note"><p>
if the return value is different from <a class="link" href="libnice-StunAgent.html#STUN-VALIDATION-NOT-STUN:CAPS"><span class="type">STUN_VALIDATION_NOT_STUN</span></a> or
<a class="link" href="libnice-StunAgent.html#STUN-VALIDATION-INCOMPLETE-STUN:CAPS"><span class="type">STUN_VALIDATION_INCOMPLETE_STUN</span></a>, then the <em class="parameter"><code>msg</code></em> argument will contain a valid
STUN message that can be used.
This means that you can use the <em class="parameter"><code>msg</code></em> variable as the <em class="parameter"><code>request</code></em> argument to
functions like <a class="link" href="libnice-StunAgent.html#stun-agent-init-error" title="stun_agent_init_error ()"><code class="function">stun_agent_init_error()</code></a> or
<a class="link" href="libnice-StunAgent.html#stun-agent-build-unknown-attributes-error" title="stun_agent_build_unknown_attributes_error ()"><code class="function">stun_agent_build_unknown_attributes_error()</code></a>.
If the return value is <a class="link" href="libnice-StunAgent.html#STUN-VALIDATION-BAD-REQUEST:CAPS"><span class="type">STUN_VALIDATION_BAD_REQUEST</span></a>,
<a class="link" href="libnice-StunAgent.html#STUN-VALIDATION-UNAUTHORIZED:CAPS"><span class="type">STUN_VALIDATION_UNAUTHORIZED</span></a> or <a class="link" href="libnice-StunAgent.html#STUN-VALIDATION-UNAUTHORIZED-BAD-REQUEST:CAPS"><span class="type">STUN_VALIDATION_UNAUTHORIZED_BAD_REQUEST</span></a>
then the <em class="parameter"><code>key</code></em> in the <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> will not be set, so that error responses
will not have a MESSAGE-INTEGRITY attribute.
</p></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="stun-agent-default-validater"></a><h3>stun_agent_default_validater ()</h3>
<pre class="programlisting"><span class="returnvalue">bool</span>
stun_agent_default_validater (<em class="parameter"><code><a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a> *agent</code></em>,
                              <em class="parameter"><code><a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> *message</code></em>,
                              <em class="parameter"><code><span class="type">uint8_t</span> *username</code></em>,
                              <em class="parameter"><code><span class="type">uint16_t</span> username_len</code></em>,
                              <em class="parameter"><code><span class="type">uint8_t</span> **password</code></em>,
                              <em class="parameter"><code><span class="type">size_t</span> *password_len</code></em>,
                              <em class="parameter"><code><span class="type">void</span> *user_data</code></em>);</pre>
<p>This is a helper function to be used with <a class="link" href="libnice-StunAgent.html#stun-agent-validate" title="stun_agent_validate ()"><code class="function">stun_agent_validate()</code></a>. If no
complicated processing of the username needs to be done, this function can
be used with <a class="link" href="libnice-StunAgent.html#stun-agent-validate" title="stun_agent_validate ()"><code class="function">stun_agent_validate()</code></a> to quickly and easily match the username
of a STUN message with its password. Its <em class="parameter"><code>user_data</code></em>
 argument must be an array
of <a class="link" href="libnice-StunAgent.html#StunDefaultValidaterData" title="StunDefaultValidaterData"><span class="type">StunDefaultValidaterData</span></a> which will allow us to map a username to a
password</p>
<p> See also: <a class="link" href="libnice-StunAgent.html#stun-agent-validate" title="stun_agent_validate ()"><code class="function">stun_agent_validate()</code></a> </p>
<div class="refsect3">
<a name="stun-agent-default-validater.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>agent</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> being validated</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>username</p></td>
<td class="parameter_description"><p>The username found in the <em class="parameter"><code>message</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>username_len</p></td>
<td class="parameter_description"><p>The length of <em class="parameter"><code>username</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>password</p></td>
<td class="parameter_description"><p>The password associated with that username. This argument is a
pointer to a byte array that must be set by the validater function.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>password_len</p></td>
<td class="parameter_description"><p>The length of <em class="parameter"><code>password</code></em>
which must also be set by the
validater function.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>This must be an array of <a class="link" href="libnice-StunAgent.html#StunDefaultValidaterData" title="StunDefaultValidaterData"><span class="type">StunDefaultValidaterData</span></a> structures.
The last element in the array must have a username set to NULL</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="stun-agent-default-validater.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the authentication was successful,
<a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> if the authentication failed</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="stun-agent-init-request"></a><h3>stun_agent_init_request ()</h3>
<pre class="programlisting"><span class="returnvalue">bool</span>
stun_agent_init_request (<em class="parameter"><code><a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a> *agent</code></em>,
                         <em class="parameter"><code><a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> *msg</code></em>,
                         <em class="parameter"><code><span class="type">uint8_t</span> *buffer</code></em>,
                         <em class="parameter"><code><span class="type">size_t</span> buffer_len</code></em>,
                         <em class="parameter"><code><a class="link" href="libnice-StunMessage.html#StunMethod" title="enum StunMethod"><span class="type">StunMethod</span></a> m</code></em>);</pre>
<p>Creates a new STUN message of class <a class="link" href="libnice-StunMessage.html#STUN-REQUEST:CAPS"><span class="type">STUN_REQUEST</span></a> and with the method <em class="parameter"><code>m</code></em>
</p>
<div class="refsect3">
<a name="stun-agent-init-request.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>agent</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>msg</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> to build</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>buffer</p></td>
<td class="parameter_description"><p>The buffer to use in the <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>buffer_len</p></td>
<td class="parameter_description"><p>The length of the buffer</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>m</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunMessage.html#StunMethod" title="enum StunMethod"><span class="type">StunMethod</span></a> of the request</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="stun-agent-init-request.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the message was initialized correctly, <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="stun-agent-init-indication"></a><h3>stun_agent_init_indication ()</h3>
<pre class="programlisting"><span class="returnvalue">bool</span>
stun_agent_init_indication (<em class="parameter"><code><a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a> *agent</code></em>,
                            <em class="parameter"><code><a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> *msg</code></em>,
                            <em class="parameter"><code><span class="type">uint8_t</span> *buffer</code></em>,
                            <em class="parameter"><code><span class="type">size_t</span> buffer_len</code></em>,
                            <em class="parameter"><code><a class="link" href="libnice-StunMessage.html#StunMethod" title="enum StunMethod"><span class="type">StunMethod</span></a> m</code></em>);</pre>
<p>Creates a new STUN message of class <a class="link" href="libnice-StunMessage.html#STUN-INDICATION:CAPS"><span class="type">STUN_INDICATION</span></a> and with the method <em class="parameter"><code>m</code></em>
</p>
<div class="refsect3">
<a name="stun-agent-init-indication.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>agent</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>msg</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> to build</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>buffer</p></td>
<td class="parameter_description"><p>The buffer to use in the <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>buffer_len</p></td>
<td class="parameter_description"><p>The length of the buffer</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>m</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunMessage.html#StunMethod" title="enum StunMethod"><span class="type">StunMethod</span></a> of the indication</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="stun-agent-init-indication.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the message was initialized correctly, <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="stun-agent-init-response"></a><h3>stun_agent_init_response ()</h3>
<pre class="programlisting"><span class="returnvalue">bool</span>
stun_agent_init_response (<em class="parameter"><code><a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a> *agent</code></em>,
                          <em class="parameter"><code><a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> *msg</code></em>,
                          <em class="parameter"><code><span class="type">uint8_t</span> *buffer</code></em>,
                          <em class="parameter"><code><span class="type">size_t</span> buffer_len</code></em>,
                          <em class="parameter"><code>const <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> *request</code></em>);</pre>
<p>Creates a new STUN message of class <a class="link" href="libnice-StunMessage.html#STUN-RESPONSE:CAPS"><span class="type">STUN_RESPONSE</span></a> and with the same method
and transaction ID as the message <em class="parameter"><code>request</code></em>
. This will also copy the pointer
to the key that was used to authenticate the request, so you won't need to
specify the key with <a class="link" href="libnice-StunAgent.html#stun-agent-finish-message" title="stun_agent_finish_message ()"><code class="function">stun_agent_finish_message()</code></a></p>
<div class="refsect3">
<a name="stun-agent-init-response.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>agent</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>msg</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> to build</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>buffer</p></td>
<td class="parameter_description"><p>The buffer to use in the <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>buffer_len</p></td>
<td class="parameter_description"><p>The length of the buffer</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>request</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> of class <a class="link" href="libnice-StunMessage.html#STUN-REQUEST:CAPS"><span class="type">STUN_REQUEST</span></a> that this response is for</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="stun-agent-init-response.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the message was initialized correctly, <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="stun-agent-init-error"></a><h3>stun_agent_init_error ()</h3>
<pre class="programlisting"><span class="returnvalue">bool</span>
stun_agent_init_error (<em class="parameter"><code><a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a> *agent</code></em>,
                       <em class="parameter"><code><a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> *msg</code></em>,
                       <em class="parameter"><code><span class="type">uint8_t</span> *buffer</code></em>,
                       <em class="parameter"><code><span class="type">size_t</span> buffer_len</code></em>,
                       <em class="parameter"><code>const <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> *request</code></em>,
                       <em class="parameter"><code><a class="link" href="libnice-StunMessage.html#StunError" title="enum StunError"><span class="type">StunError</span></a> err</code></em>);</pre>
<p>Creates a new STUN message of class <a class="link" href="libnice-StunMessage.html#STUN-ERROR:CAPS"><span class="type">STUN_ERROR</span></a> and with the same method
and transaction ID as the message <em class="parameter"><code>request</code></em>
. This will also copy the pointer
to the key that was used to authenticate the request (if authenticated),
so you won't need to specify the key with <a class="link" href="libnice-StunAgent.html#stun-agent-finish-message" title="stun_agent_finish_message ()"><code class="function">stun_agent_finish_message()</code></a>.
It will then add the ERROR-CODE attribute with code <em class="parameter"><code>err</code></em>
 and the associated
string.</p>
<div class="refsect3">
<a name="stun-agent-init-error.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>agent</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>msg</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> to build</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>buffer</p></td>
<td class="parameter_description"><p>The buffer to use in the <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>buffer_len</p></td>
<td class="parameter_description"><p>The length of the buffer</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>request</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> of class <a class="link" href="libnice-StunMessage.html#STUN-REQUEST:CAPS"><span class="type">STUN_REQUEST</span></a> that this error response
is for</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>err</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunMessage.html#StunError" title="enum StunError"><span class="type">StunError</span></a> to put in the ERROR-CODE attribute of the error response</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="stun-agent-init-error.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the message was initialized correctly, <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="stun-agent-build-unknown-attributes-error"></a><h3>stun_agent_build_unknown_attributes_error ()</h3>
<pre class="programlisting"><span class="returnvalue">size_t</span>
stun_agent_build_unknown_attributes_error
                               (<em class="parameter"><code><a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a> *agent</code></em>,
                                <em class="parameter"><code><a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> *msg</code></em>,
                                <em class="parameter"><code><span class="type">uint8_t</span> *buffer</code></em>,
                                <em class="parameter"><code><span class="type">size_t</span> buffer_len</code></em>,
                                <em class="parameter"><code>const <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> *request</code></em>);</pre>
<p>Creates a new STUN message of class <a class="link" href="libnice-StunMessage.html#STUN-ERROR:CAPS"><span class="type">STUN_ERROR</span></a> and with the same method
and transaction ID as the message <em class="parameter"><code>request</code></em>
.  It will then add the ERROR-CODE
attribute with code <a class="link" href="libnice-StunMessage.html#STUN-ERROR-UNKNOWN-ATTRIBUTE:CAPS"><span class="type">STUN_ERROR_UNKNOWN_ATTRIBUTE</span></a> and add all the unknown
mandatory attributes from the <em class="parameter"><code>request</code></em>
 STUN message in the
<a class="link" href="libnice-StunMessage.html#STUN-ATTRIBUTE-UNKNOWN-ATTRIBUTES:CAPS"><span class="type">STUN_ATTRIBUTE_UNKNOWN_ATTRIBUTES</span></a> attribute, it will then finish the message
by calling <a class="link" href="libnice-StunAgent.html#stun-agent-finish-message" title="stun_agent_finish_message ()"><code class="function">stun_agent_finish_message()</code></a></p>
<div class="refsect3">
<a name="stun-agent-build-unknown-attributes-error.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>agent</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>msg</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> to build</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>buffer</p></td>
<td class="parameter_description"><p>The buffer to use in the <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>buffer_len</p></td>
<td class="parameter_description"><p>The length of the buffer</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>request</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> of class <a class="link" href="libnice-StunMessage.html#STUN-REQUEST:CAPS"><span class="type">STUN_REQUEST</span></a> that this response is for</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="stun-agent-build-unknown-attributes-error.returns"></a><h4>Returns</h4>
<p> The size of the message built</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="stun-agent-finish-message"></a><h3>stun_agent_finish_message ()</h3>
<pre class="programlisting"><span class="returnvalue">size_t</span>
stun_agent_finish_message (<em class="parameter"><code><a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a> *agent</code></em>,
                           <em class="parameter"><code><a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> *msg</code></em>,
                           <em class="parameter"><code>const <span class="type">uint8_t</span> *key</code></em>,
                           <em class="parameter"><code><span class="type">size_t</span> key_len</code></em>);</pre>
<p>This function will 'finish' a message and make it ready to be sent. It will
add the MESSAGE-INTEGRITY and FINGERPRINT attributes if necessary. If the
STUN message has a <a class="link" href="libnice-StunMessage.html#STUN-REQUEST:CAPS"><span class="type">STUN_REQUEST</span></a> class, it will save the transaction id of
the message in the agent for future matching of the response.</p>
<p>See also: <a class="link" href="libnice-StunAgent.html#stun-agent-forget-transaction" title="stun_agent_forget_transaction ()"><code class="function">stun_agent_forget_transaction()</code></a></p>
<div class="refsect3">
<a name="stun-agent-finish-message.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>agent</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>msg</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> to finish</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>key</p></td>
<td class="parameter_description"><p>The key to use for the MESSAGE-INTEGRITY attribute</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>key_len</p></td>
<td class="parameter_description"><p>The length of the <em class="parameter"><code>key</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="stun-agent-finish-message.returns"></a><h4>Returns</h4>
<p> The final size of the message built or 0 if an error occured</p>
<div class="note">
<p>
The return value must always be checked. a value of 0 means the either
the buffer's size is too small to contain the finishing attributes
(MESSAGE-INTEGRITY, FINGERPRINT), or that there is no more free slots
for saving the sent id in the agent's state.
</p>
<p>
Everytime <a class="link" href="libnice-StunAgent.html#stun-agent-finish-message" title="stun_agent_finish_message ()"><code class="function">stun_agent_finish_message()</code></a> is called for a <a class="link" href="libnice-StunMessage.html#STUN-REQUEST:CAPS"><span class="type">STUN_REQUEST</span></a>
message, you must make sure to call <a class="link" href="libnice-StunAgent.html#stun-agent-forget-transaction" title="stun_agent_forget_transaction ()"><code class="function">stun_agent_forget_transaction()</code></a> in
case the response times out and is never received. This is to avoid
filling up the <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a>'s sent ids state preventing any further
use of the <a class="link" href="libnice-StunAgent.html#stun-agent-finish-message" title="stun_agent_finish_message ()"><code class="function">stun_agent_finish_message()</code></a>
</p>
</div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="stun-agent-forget-transaction"></a><h3>stun_agent_forget_transaction ()</h3>
<pre class="programlisting"><span class="returnvalue">bool</span>
stun_agent_forget_transaction (<em class="parameter"><code><a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a> *agent</code></em>,
                               <em class="parameter"><code><a class="link" href="libnice-StunMessage.html#StunTransactionId" title="StunTransactionId"><span class="type">StunTransactionId</span></a> id</code></em>);</pre>
<p>This function is used to make the <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a> forget about a previously
created transaction.</p>
<p>
This function should be called when a STUN request was previously
created with <a class="link" href="libnice-StunAgent.html#stun-agent-finish-message" title="stun_agent_finish_message ()"><code class="function">stun_agent_finish_message()</code></a> and for which no response was ever
received (timed out). The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a> keeps a list of the sent transactions
in order to validate the responses received. If the response is never received
this will allow the <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a> to forget about the timed out transaction and
free its slot for future transactions.
</p>
<div class="refsect3">
<a name="stun-agent-forget-transaction.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>agent</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>id</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunMessage.html#StunTransactionId" title="StunTransactionId"><span class="type">StunTransactionId</span></a> of the transaction to forget</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="stun-agent-forget-transaction.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the transaction was found, <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise</p>
</div>
<p class="since">Since: <a class="link" href="ix04.html#api-index-0.0.6">0.0.6</a></p>
</div>
<hr>
<div class="refsect2">
<a name="stun-agent-set-software"></a><h3>stun_agent_set_software ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
stun_agent_set_software (<em class="parameter"><code><a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a> *agent</code></em>,
                         <em class="parameter"><code>const <span class="type">char</span> *software</code></em>);</pre>
<p>This function will set the value of the SOFTWARE attribute to be added to
STUN requests, responses and error responses.</p>
<p>
Calling this function will automatically enable the addition of the SOFTWARE
attribute for RFC5389 and MSICE2 compatibility modes.

</p>
<div class="note">
<p>
       The <em class="parameter"><code>software</code></em> argument must be in UTF-8 encoding and only the first
       128 characters will be sent.
     </p>
<p>
       The value of the <em class="parameter"><code>software</code></em> argument must stay valid throughout the life of
       the StunAgent's life. Do not free its content.
     </p>
</div>
<div class="refsect3">
<a name="stun-agent-set-software.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>agent</p></td>
<td class="parameter_description"><p>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>software</p></td>
<td class="parameter_description"><p>The value of the SOFTWARE attribute to add.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix07.html#api-index-0.0.10">0.0.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="stun-debug-enable"></a><h3>stun_debug_enable ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
stun_debug_enable (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Enable debug messages to stderr</p>
</div>
<hr>
<div class="refsect2">
<a name="stun-debug-disable"></a><h3>stun_debug_disable ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
stun_debug_disable (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Disable debug messages to stderr</p>
</div>
<hr>
<div class="refsect2">
<a name="stun-set-debug-handler"></a><h3>stun_set_debug_handler ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
stun_set_debug_handler (<em class="parameter"><code><a class="link" href="libnice-StunAgent.html#StunDebugHandler" title="StunDebugHandler ()"><span class="type">StunDebugHandler</span></a> handler</code></em>);</pre>
<p>Set a callback function to be invoked for each debug message from the STUN
code. The callback will only be invoked if STUN debugging is enabled using
<a class="link" href="libnice-StunAgent.html#stun-debug-enable" title="stun_debug_enable ()"><code class="function">stun_debug_enable()</code></a>.</p>
<p>The default callback prints the formatted debug message to stderr.</p>
<div class="refsect3">
<a name="stun-set-debug-handler.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>handler</p></td>
<td class="parameter_description"><p> Handler for STUN debug messages, or <a href="/usr/share/gtk-doc/html/liboilliboil-liboiljunk.html#NULL:CAPS"><code class="literal">NULL</code></a> to use the
default. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr></tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="libnice-StunAgent.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="StunAgent"></a><h3>StunAgent</h3>
<pre class="programlisting">typedef struct stun_agent_t StunAgent;
</pre>
<p>An opaque structure representing the STUN agent.</p>
</div>
<hr>
<div class="refsect2">
<a name="StunCompatibility"></a><h3>enum StunCompatibility</h3>
<p>Enum that specifies the STUN compatibility mode of the <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a></p>
<div class="warning">
<em class="parameter"><code>STUN_COMPATIBILITY_WLM2009</code></em> is deprecated and should not be used
in newly-written code. It is kept for compatibility reasons and represents
the same compatibility as <em class="parameter"><code>STUN_COMPATIBILITY_MSICE2</code></em>.</div>
<div class="refsect3">
<a name="StunCompatibility.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="STUN-COMPATIBILITY-RFC3489:CAPS"></a>STUN_COMPATIBILITY_RFC3489</p></td>
<td class="enum_member_description">
<p>Use the STUN specifications compatible with
RFC 3489</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="STUN-COMPATIBILITY-RFC5389:CAPS"></a>STUN_COMPATIBILITY_RFC5389</p></td>
<td class="enum_member_description">
<p>Use the STUN specifications compatible with
RFC 5389</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="STUN-COMPATIBILITY-MSICE2:CAPS"></a>STUN_COMPATIBILITY_MSICE2</p></td>
<td class="enum_member_description">
<p>Use the STUN specifications compatible with
[MS-ICE2] (a mix between RFC3489 and RFC5389)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="STUN-COMPATIBILITY-OC2007:CAPS"></a>STUN_COMPATIBILITY_OC2007</p></td>
<td class="enum_member_description">
<p>Use the STUN specifications compatible with
Microsoft Office Communicator 2007 (basically RFC3489 with swapped
REALM and NONCE attribute hex IDs, attributes are not aligned)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="STUN-COMPATIBILITY-WLM2009:CAPS"></a>STUN_COMPATIBILITY_WLM2009</p></td>
<td class="enum_member_description">
<p>An alias for <em class="parameter"><code>STUN_COMPATIBILITY_MSICE2</code></em>
</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="STUN-COMPATIBILITY-LAST:CAPS"></a>STUN_COMPATIBILITY_LAST</p></td>
<td class="enum_member_description">
<p>Dummy last compatibility mode</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="StunAgentUsageFlags"></a><h3>enum StunAgentUsageFlags</h3>
<p>This enum defines a bitflag usages for a <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a> and they will define how
the agent should behave, independently of the compatibility mode it uses.</p>
<p> See also: <a class="link" href="libnice-StunAgent.html#stun-agent-init" title="stun_agent_init ()"><code class="function">stun_agent_init()</code></a> </p>
<p> See also: <a class="link" href="libnice-StunAgent.html#stun-agent-validate" title="stun_agent_validate ()"><code class="function">stun_agent_validate()</code></a> </p>
<div class="refsect3">
<a name="StunAgentUsageFlags.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="STUN-AGENT-USAGE-SHORT-TERM-CREDENTIALS:CAPS"></a>STUN_AGENT_USAGE_SHORT_TERM_CREDENTIALS</p></td>
<td class="enum_member_description">
<p>The agent should be using the short
term credentials mechanism for authenticating STUN messages</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="STUN-AGENT-USAGE-LONG-TERM-CREDENTIALS:CAPS"></a>STUN_AGENT_USAGE_LONG_TERM_CREDENTIALS</p></td>
<td class="enum_member_description">
<p>The agent should be using the long
term credentials mechanism for authenticating STUN messages</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="STUN-AGENT-USAGE-USE-FINGERPRINT:CAPS"></a>STUN_AGENT_USAGE_USE_FINGERPRINT</p></td>
<td class="enum_member_description">
<p>The agent should add the FINGERPRINT
attribute to the STUN messages it creates.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="STUN-AGENT-USAGE-ADD-SOFTWARE:CAPS"></a>STUN_AGENT_USAGE_ADD_SOFTWARE</p></td>
<td class="enum_member_description">
<p>The agent should add the SOFTWARE attribute
to the STUN messages it creates. Calling <a class="link" href="NiceAgent.html#nice-agent-set-software" title="nice_agent_set_software ()"><code class="function">nice_agent_set_software()</code></a> will have
the same effect as enabling this Usage. STUN Indications do not have the
SOFTWARE attributes added to them though. The SOFTWARE attribute is only
added for the RFC5389 and MSICE2 compatibility modes.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="STUN-AGENT-USAGE-IGNORE-CREDENTIALS:CAPS"></a>STUN_AGENT_USAGE_IGNORE_CREDENTIALS</p></td>
<td class="enum_member_description">
<p>The agent should ignore any credentials
in the STUN messages it receives (the MESSAGE-INTEGRITY attribute
will never be validated by <a class="link" href="libnice-StunAgent.html#stun-agent-validate" title="stun_agent_validate ()"><code class="function">stun_agent_validate()</code></a>)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="STUN-AGENT-USAGE-NO-INDICATION-AUTH:CAPS"></a>STUN_AGENT_USAGE_NO_INDICATION_AUTH</p></td>
<td class="enum_member_description">
<p>The agent should ignore credentials
in the STUN messages it receives if the <a class="link" href="libnice-StunMessage.html#StunClass" title="enum StunClass"><span class="type">StunClass</span></a> of the message is
<a class="link" href="libnice-StunMessage.html#STUN-INDICATION:CAPS"><span class="type">STUN_INDICATION</span></a> (some implementation require <a class="link" href="libnice-StunMessage.html#STUN-INDICATION:CAPS"><span class="type">STUN_INDICATION</span></a> messages to
be authenticated, while others never add a MESSAGE-INTEGRITY attribute to a
<a class="link" href="libnice-StunMessage.html#STUN-INDICATION:CAPS"><span class="type">STUN_INDICATION</span></a> message)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="STUN-AGENT-USAGE-FORCE-VALIDATER:CAPS"></a>STUN_AGENT_USAGE_FORCE_VALIDATER</p></td>
<td class="enum_member_description">
<p>The agent should always try to validate
the password of a STUN message, even if it already knows what the password
should be (a response to a previously created request). This means that the
<a class="link" href="libnice-StunAgent.html#StunMessageIntegrityValidate" title="StunMessageIntegrityValidate ()"><span class="type">StunMessageIntegrityValidate</span></a> callback will always be called when there is
a MESSAGE-INTEGRITY attribute.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="STUN-AGENT-USAGE-NO-ALIGNED-ATTRIBUTES:CAPS"></a>STUN_AGENT_USAGE_NO_ALIGNED_ATTRIBUTES</p></td>
<td class="enum_member_description">
<p>The agent should not assume STUN
attributes are aligned on 32-bit boundaries when parsing messages and also
do not add padding when creating messages.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="StunValidationStatus"></a><h3>enum StunValidationStatus</h3>
<p>This enum is used as the return value of <a class="link" href="libnice-StunAgent.html#stun-agent-validate" title="stun_agent_validate ()"><code class="function">stun_agent_validate()</code></a> and represents
the status result of the validation of a STUN message.</p>
<div class="refsect3">
<a name="StunValidationStatus.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="STUN-VALIDATION-SUCCESS:CAPS"></a>STUN_VALIDATION_SUCCESS</p></td>
<td class="enum_member_description">
<p>The message is validated</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="STUN-VALIDATION-NOT-STUN:CAPS"></a>STUN_VALIDATION_NOT_STUN</p></td>
<td class="enum_member_description">
<p>This is not a valid STUN message</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="STUN-VALIDATION-INCOMPLETE-STUN:CAPS"></a>STUN_VALIDATION_INCOMPLETE_STUN</p></td>
<td class="enum_member_description">
<p>The message seems to be valid but incomplete</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="STUN-VALIDATION-BAD-REQUEST:CAPS"></a>STUN_VALIDATION_BAD_REQUEST</p></td>
<td class="enum_member_description">
<p>The message does not have the cookie or the
fingerprint while the agent needs it with its usage</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="STUN-VALIDATION-UNAUTHORIZED-BAD-REQUEST:CAPS"></a>STUN_VALIDATION_UNAUTHORIZED_BAD_REQUEST</p></td>
<td class="enum_member_description">
<p>The message is valid but
unauthorized with no username and message-integrity attributes.
A BAD_REQUEST error must be generated</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="STUN-VALIDATION-UNAUTHORIZED:CAPS"></a>STUN_VALIDATION_UNAUTHORIZED</p></td>
<td class="enum_member_description">
<p>The message is valid but unauthorized as
the username/password do not match.
An UNAUTHORIZED error must be generated</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="STUN-VALIDATION-UNMATCHED-RESPONSE:CAPS"></a>STUN_VALIDATION_UNMATCHED_RESPONSE</p></td>
<td class="enum_member_description">
<p>The message is valid but this is a
response/error that doesn't match a previously sent request</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="STUN-VALIDATION-UNKNOWN-REQUEST-ATTRIBUTE:CAPS"></a>STUN_VALIDATION_UNKNOWN_REQUEST_ATTRIBUTE</p></td>
<td class="enum_member_description">
<p>The message is valid but
contains one or more unknown comprehension attributes.
<a class="link" href="libnice-StunAgent.html#stun-agent-build-unknown-attributes-error" title="stun_agent_build_unknown_attributes_error ()"><code class="function">stun_agent_build_unknown_attributes_error()</code></a> should be called</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="STUN-VALIDATION-UNKNOWN-ATTRIBUTE:CAPS"></a>STUN_VALIDATION_UNKNOWN_ATTRIBUTE</p></td>
<td class="enum_member_description">
<p>The message is valid but contains one
or more unknown comprehension attributes. This is a response, or error,
or indication message and no error response should be sent</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="StunDefaultValidaterData"></a><h3>StunDefaultValidaterData</h3>
<pre class="programlisting">typedef struct {
  uint8_t *username;
  size_t username_len;
  uint8_t *password;
  size_t password_len;
} StunDefaultValidaterData;
</pre>
<p>This structure is used as an element of the user_data to the
<a class="link" href="libnice-StunAgent.html#stun-agent-default-validater" title="stun_agent_default_validater ()"><code class="function">stun_agent_default_validater()</code></a> function for authenticating a STUN
message during validationg.</p>
<p> See also: <a class="link" href="libnice-StunAgent.html#stun-agent-default-validater" title="stun_agent_default_validater ()"><code class="function">stun_agent_default_validater()</code></a> </p>
<div class="refsect3">
<a name="StunDefaultValidaterData.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p><span class="type">uint8_t</span> *<em class="structfield"><code><a name="StunDefaultValidaterData.username"></a>username</code></em>;</p></td>
<td class="struct_member_description"><p>The username</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><span class="type">size_t</span> <em class="structfield"><code><a name="StunDefaultValidaterData.username-len"></a>username_len</code></em>;</p></td>
<td class="struct_member_description"><p>The length of the <em class="parameter"><code>username</code></em>
</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><span class="type">uint8_t</span> *<em class="structfield"><code><a name="StunDefaultValidaterData.password"></a>password</code></em>;</p></td>
<td class="struct_member_description"><p>The password</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><span class="type">size_t</span> <em class="structfield"><code><a name="StunDefaultValidaterData.password-len"></a>password_len</code></em>;</p></td>
<td class="struct_member_description"><p>The length of the <em class="parameter"><code>password</code></em>
</p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="libnice-StunAgent.see-also"></a><h2>See Also</h2>
<p><a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a></p>
</div>
</div>
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