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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>StunAgent</title>
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                  <a href="#libnice-StunAgent.description" class="shortcut">Description</a>
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<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>
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<div class="refsect1">
<a name="libnice-StunAgent.stability-level"></a><h2>Stability Level</h2>
Stable, unless otherwise indicated
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<div class="refsynopsisdiv">
<a name="libnice-StunAgent.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include &lt;stun/stunagent.h&gt;

typedef             <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent">StunAgent</a>;
enum                <a class="link" href="libnice-StunAgent.html#StunCompatibility" title="enum StunCompatibility">StunCompatibility</a>;
enum                <a class="link" href="libnice-StunAgent.html#StunAgentUsageFlags" title="enum StunAgentUsageFlags">StunAgentUsageFlags</a>;
enum                <a class="link" href="libnice-StunAgent.html#StunValidationStatus" title="enum StunValidationStatus">StunValidationStatus</a>;
<span class="returnvalue">bool</span>                (<a class="link" href="libnice-StunAgent.html#StunMessageIntegrityValidate" title="StunMessageIntegrityValidate ()">*StunMessageIntegrityValidate</a>)     (<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>);
                    <a class="link" href="libnice-StunAgent.html#StunDefaultValidaterData" title="StunDefaultValidaterData">StunDefaultValidaterData</a>;
<span class="returnvalue">void</span>                <a class="link" href="libnice-StunAgent.html#stun-agent-init" title="stun_agent_init ()">stun_agent_init</a>                     (<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>);
<a class="link" href="libnice-StunAgent.html#StunValidationStatus" title="enum StunValidationStatus"><span class="returnvalue">StunValidationStatus</span></a>  <a class="link" href="libnice-StunAgent.html#stun-agent-validate" title="stun_agent_validate ()">stun_agent_validate</a>               (<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>);
<span class="returnvalue">bool</span>                <a class="link" href="libnice-StunAgent.html#stun-agent-default-validater" title="stun_agent_default_validater ()">stun_agent_default_validater</a>        (<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>);
<span class="returnvalue">bool</span>                <a class="link" href="libnice-StunAgent.html#stun-agent-init-request" title="stun_agent_init_request ()">stun_agent_init_request</a>             (<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>);
<span class="returnvalue">bool</span>                <a class="link" href="libnice-StunAgent.html#stun-agent-init-indication" title="stun_agent_init_indication ()">stun_agent_init_indication</a>          (<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>);
<span class="returnvalue">bool</span>                <a class="link" href="libnice-StunAgent.html#stun-agent-init-response" title="stun_agent_init_response ()">stun_agent_init_response</a>            (<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>);
<span class="returnvalue">bool</span>                <a class="link" href="libnice-StunAgent.html#stun-agent-init-error" title="stun_agent_init_error ()">stun_agent_init_error</a>               (<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>);
<span class="returnvalue">size_t</span>              <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>
                                                        (<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>);
<span class="returnvalue">size_t</span>              <a class="link" href="libnice-StunAgent.html#stun-agent-finish-message" title="stun_agent_finish_message ()">stun_agent_finish_message</a>           (<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>);
<span class="returnvalue">bool</span>                <a class="link" href="libnice-StunAgent.html#stun-agent-forget-transaction" title="stun_agent_forget_transaction ()">stun_agent_forget_transaction</a>       (<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>);
<span class="returnvalue">void</span>                <a class="link" href="libnice-StunAgent.html#stun-agent-set-software" title="stun_agent_set_software ()">stun_agent_set_software</a>             (<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>);
<span class="returnvalue">void</span>                <a class="link" href="libnice-StunAgent.html#stun-debug-enable" title="stun_debug_enable ()">stun_debug_enable</a>                   (<em class="parameter"><code><span class="type">void</span></code></em>);
<span class="returnvalue">void</span>                <a class="link" href="libnice-StunAgent.html#stun-debug-disable" title="stun_debug_disable ()">stun_debug_disable</a>                  (<em class="parameter"><code><span class="type">void</span></code></em>);
</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.details"></a><h2>Details</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>
<pre class="programlisting">typedef enum {
  STUN_COMPATIBILITY_RFC3489,
  STUN_COMPATIBILITY_RFC5389,
  STUN_COMPATIBILITY_WLM2009,
  STUN_COMPATIBILITY_OC2007,
  STUN_COMPATIBILITY_LAST = STUN_COMPATIBILITY_OC2007
} StunCompatibility;
</pre>
<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="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="STUN-COMPATIBILITY-RFC3489:CAPS"></a><span class="term"><code class="literal">STUN_COMPATIBILITY_RFC3489</code></span></p></td>
<td>Use the STUN specifications compatible with
RFC 3489
</td>
</tr>
<tr>
<td><p><a name="STUN-COMPATIBILITY-RFC5389:CAPS"></a><span class="term"><code class="literal">STUN_COMPATIBILITY_RFC5389</code></span></p></td>
<td>Use the STUN specifications compatible with
RFC 5389
</td>
</tr>
<tr>
<td><p><a name="STUN-COMPATIBILITY-WLM2009:CAPS"></a><span class="term"><code class="literal">STUN_COMPATIBILITY_WLM2009</code></span></p></td>
<td>Use the STUN specifications compatible with
Windows Live Messenger 2009 (a mix between RFC3489 and RFC5389, as well as
a special usecase against a typo in their code)
</td>
</tr>
<tr>
<td><p><a name="STUN-COMPATIBILITY-OC2007:CAPS"></a><span class="term"><code class="literal">STUN_COMPATIBILITY_OC2007</code></span></p></td>
<td>Use the STUN specifications compatible with
Microsoft Office Communicator 2007 (basically RFC3489 with swapped
REALM and NONCE attribute hex IDs, attributes are not aligned)
</td>
</tr>
<tr>
<td><p><a name="STUN-COMPATIBILITY-LAST:CAPS"></a><span class="term"><code class="literal">STUN_COMPATIBILITY_LAST</code></span></p></td>
<td>Dummy last compatibility mode
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="StunAgentUsageFlags"></a><h3>enum StunAgentUsageFlags</h3>
<pre class="programlisting">typedef enum {
  STUN_AGENT_USAGE_SHORT_TERM_CREDENTIALS    = (1 &lt;&lt; 0),
  STUN_AGENT_USAGE_LONG_TERM_CREDENTIALS     = (1 &lt;&lt; 1),
  STUN_AGENT_USAGE_USE_FINGERPRINT           = (1 &lt;&lt; 2),
  STUN_AGENT_USAGE_ADD_SOFTWARE              = (1 &lt;&lt; 3),
  STUN_AGENT_USAGE_IGNORE_CREDENTIALS        = (1 &lt;&lt; 4),
  STUN_AGENT_USAGE_NO_INDICATION_AUTH        = (1 &lt;&lt; 5),
  STUN_AGENT_USAGE_FORCE_VALIDATER           = (1 &lt;&lt; 6),
  STUN_AGENT_USAGE_NO_ALIGNED_ATTRIBUTES     = (1 &lt;&lt; 7),
} StunAgentUsageFlags;
</pre>
<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>
</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>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="STUN-AGENT-USAGE-SHORT-TERM-CREDENTIALS:CAPS"></a><span class="term"><code class="literal">STUN_AGENT_USAGE_SHORT_TERM_CREDENTIALS</code></span></p></td>
<td>The agent should be using the short
term credentials mechanism for authenticating STUN messages
</td>
</tr>
<tr>
<td><p><a name="STUN-AGENT-USAGE-LONG-TERM-CREDENTIALS:CAPS"></a><span class="term"><code class="literal">STUN_AGENT_USAGE_LONG_TERM_CREDENTIALS</code></span></p></td>
<td>The agent should be using the long
term credentials mechanism for authenticating STUN messages
</td>
</tr>
<tr>
<td><p><a name="STUN-AGENT-USAGE-USE-FINGERPRINT:CAPS"></a><span class="term"><code class="literal">STUN_AGENT_USAGE_USE_FINGERPRINT</code></span></p></td>
<td>The agent should add the FINGERPRINT
attribute to the STUN messages it creates.
</td>
</tr>
<tr>
<td><p><a name="STUN-AGENT-USAGE-ADD-SOFTWARE:CAPS"></a><span class="term"><code class="literal">STUN_AGENT_USAGE_ADD_SOFTWARE</code></span></p></td>
<td>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 WLM2009 compatibility modes.
</td>
</tr>
<tr>
<td><p><a name="STUN-AGENT-USAGE-IGNORE-CREDENTIALS:CAPS"></a><span class="term"><code class="literal">STUN_AGENT_USAGE_IGNORE_CREDENTIALS</code></span></p></td>
<td>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>)
</td>
</tr>
<tr>
<td><p><a name="STUN-AGENT-USAGE-NO-INDICATION-AUTH:CAPS"></a><span class="term"><code class="literal">STUN_AGENT_USAGE_NO_INDICATION_AUTH</code></span></p></td>
<td>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)
</td>
</tr>
<tr>
<td><p><a name="STUN-AGENT-USAGE-FORCE-VALIDATER:CAPS"></a><span class="term"><code class="literal">STUN_AGENT_USAGE_FORCE_VALIDATER</code></span></p></td>
<td>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.
</td>
</tr>
<tr>
<td><p><a name="STUN-AGENT-USAGE-NO-ALIGNED-ATTRIBUTES:CAPS"></a><span class="term"><code class="literal">STUN_AGENT_USAGE_NO_ALIGNED_ATTRIBUTES</code></span></p></td>
<td>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.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="StunValidationStatus"></a><h3>enum StunValidationStatus</h3>
<pre class="programlisting">typedef enum {
  STUN_VALIDATION_SUCCESS,
  STUN_VALIDATION_NOT_STUN,
  STUN_VALIDATION_INCOMPLETE_STUN,
  STUN_VALIDATION_BAD_REQUEST,
  STUN_VALIDATION_UNAUTHORIZED_BAD_REQUEST,
  STUN_VALIDATION_UNAUTHORIZED,
  STUN_VALIDATION_UNMATCHED_RESPONSE,
  STUN_VALIDATION_UNKNOWN_REQUEST_ATTRIBUTE,
  STUN_VALIDATION_UNKNOWN_ATTRIBUTE,
} StunValidationStatus;
</pre>
<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="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="STUN-VALIDATION-SUCCESS:CAPS"></a><span class="term"><code class="literal">STUN_VALIDATION_SUCCESS</code></span></p></td>
<td>The message is validated
</td>
</tr>
<tr>
<td><p><a name="STUN-VALIDATION-NOT-STUN:CAPS"></a><span class="term"><code class="literal">STUN_VALIDATION_NOT_STUN</code></span></p></td>
<td>This is not a valid STUN message
</td>
</tr>
<tr>
<td><p><a name="STUN-VALIDATION-INCOMPLETE-STUN:CAPS"></a><span class="term"><code class="literal">STUN_VALIDATION_INCOMPLETE_STUN</code></span></p></td>
<td>The message seems to be valid but incomplete
</td>
</tr>
<tr>
<td><p><a name="STUN-VALIDATION-BAD-REQUEST:CAPS"></a><span class="term"><code class="literal">STUN_VALIDATION_BAD_REQUEST</code></span></p></td>
<td>The message does not have the cookie or the
fingerprint while the agent needs it with its usage
</td>
</tr>
<tr>
<td><p><a name="STUN-VALIDATION-UNAUTHORIZED-BAD-REQUEST:CAPS"></a><span class="term"><code class="literal">STUN_VALIDATION_UNAUTHORIZED_BAD_REQUEST</code></span></p></td>
<td>The message is valid but
unauthorized with no username and message-integrity attributes.
A BAD_REQUEST error must be generated
</td>
</tr>
<tr>
<td><p><a name="STUN-VALIDATION-UNAUTHORIZED:CAPS"></a><span class="term"><code class="literal">STUN_VALIDATION_UNAUTHORIZED</code></span></p></td>
<td>The message is valid but unauthorized as
the username/password do not match.
An UNAUTHORIZED error must be generated
</td>
</tr>
<tr>
<td><p><a name="STUN-VALIDATION-UNMATCHED-RESPONSE:CAPS"></a><span class="term"><code class="literal">STUN_VALIDATION_UNMATCHED_RESPONSE</code></span></p></td>
<td>The message is valid but this is a
response/error that doesn't match a previously sent request
</td>
</tr>
<tr>
<td><p><a name="STUN-VALIDATION-UNKNOWN-REQUEST-ATTRIBUTE:CAPS"></a><span class="term"><code class="literal">STUN_VALIDATION_UNKNOWN_REQUEST_ATTRIBUTE</code></span></p></td>
<td>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
</td>
</tr>
<tr>
<td><p><a name="STUN-VALIDATION-UNKNOWN-ATTRIBUTE:CAPS"></a><span class="term"><code class="literal">STUN_VALIDATION_UNKNOWN_ATTRIBUTE</code></span></p></td>
<td>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
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="StunMessageIntegrityValidate"></a><h3>StunMessageIntegrityValidate ()</h3>
<pre class="programlisting"><span class="returnvalue">bool</span>                (*StunMessageIntegrityValidate)     (<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>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>agent</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>message</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> being validated</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>username</code></em> :</span></p></td>
<td>The username found in the <em class="parameter"><code>message</code></em>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>username_len</code></em> :</span></p></td>
<td>The length of <em class="parameter"><code>username</code></em>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>password</code></em> :</span></p></td>
<td>The password associated with that username. This argument is a
pointer to a byte array that must be set by the validater function.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>password_len</code></em> :</span></p></td>
<td>The length of <em class="parameter"><code>password</code></em> which must also be set by the
validater function.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>Data to give the function</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the authentication was successful,
<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> if the authentication failed</td>
</tr>
</tbody>
</table></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>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><span class="type">uint8_t</span> *<em class="structfield"><code><a name="StunDefaultValidaterData.username"></a>username</code></em>;</span></p></td>
<td>The username</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">size_t</span> <em class="structfield"><code><a name="StunDefaultValidaterData.username-len"></a>username_len</code></em>;</span></p></td>
<td>The length of the <em class="parameter"><code>username</code></em>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">uint8_t</span> *<em class="structfield"><code><a name="StunDefaultValidaterData.password"></a>password</code></em>;</span></p></td>
<td>The password</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">size_t</span> <em class="structfield"><code><a name="StunDefaultValidaterData.password-len"></a>password_len</code></em>;</span></p></td>
<td>The length of the <em class="parameter"><code>password</code></em>
</td>
</tr>
</tbody>
</table></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>
<p>
 </p>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Note</h3>
<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-WLM2009:CAPS"><span class="type">STUN_COMPATIBILITY_WLM2009</span></a> <em class="parameter"><code>compatibility</code></em> is used
    </p>
</div>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>agent</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a> to initialize</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>known_attributes</code></em> :</span></p></td>
<td>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>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>compatibility</code></em> :</span></p></td>
<td>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</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>usage_flags</code></em> :</span></p></td>
<td>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.</td>
</tr>
</tbody>
</table></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>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>agent</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>msg</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> to build</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>buffer</code></em> :</span></p></td>
<td>The data buffer of the STUN message</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>buffer_len</code></em> :</span></p></td>
<td>The length of <em class="parameter"><code>buffer</code></em>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>validater</code></em> :</span></p></td>
<td>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.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>validater_data</code></em> :</span></p></td>
<td>A user data to give to the <em class="parameter"><code>validater</code></em> callback when it gets
called.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A <a class="link" href="libnice-StunAgent.html#StunValidationStatus" title="enum StunValidationStatus"><span class="type">StunValidationStatus</span></a>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Note</h3>
<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>
</td>
</tr>
</tbody>
</table></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>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>agent</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>message</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> being validated</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>username</code></em> :</span></p></td>
<td>The username found in the <em class="parameter"><code>message</code></em>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>username_len</code></em> :</span></p></td>
<td>The length of <em class="parameter"><code>username</code></em>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>password</code></em> :</span></p></td>
<td>The password associated with that username. This argument is a
pointer to a byte array that must be set by the validater function.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>password_len</code></em> :</span></p></td>
<td>The length of <em class="parameter"><code>password</code></em> which must also be set by the
validater function.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>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</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the authentication was successful,
<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> if the authentication failed</td>
</tr>
</tbody>
</table></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="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>agent</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>msg</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> to build</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>buffer</code></em> :</span></p></td>
<td>The buffer to use in the <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>buffer_len</code></em> :</span></p></td>
<td>The length of the buffer</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>m</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunMessage.html#StunMethod" title="enum StunMethod"><span class="type">StunMethod</span></a> of the request</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the message was initialized correctly, <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise</td>
</tr>
</tbody>
</table></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="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>agent</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>msg</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> to build</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>buffer</code></em> :</span></p></td>
<td>The buffer to use in the <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>buffer_len</code></em> :</span></p></td>
<td>The length of the buffer</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>m</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunMessage.html#StunMethod" title="enum StunMethod"><span class="type">StunMethod</span></a> of the indication</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the message was initialized correctly, <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise</td>
</tr>
</tbody>
</table></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="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>agent</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>msg</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> to build</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>buffer</code></em> :</span></p></td>
<td>The buffer to use in the <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>buffer_len</code></em> :</span></p></td>
<td>The length of the buffer</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>request</code></em> :</span></p></td>
<td>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</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the message was initialized correctly, <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise</td>
</tr>
</tbody>
</table></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="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>agent</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>msg</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> to build</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>buffer</code></em> :</span></p></td>
<td>The buffer to use in the <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>buffer_len</code></em> :</span></p></td>
<td>The length of the buffer</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>request</code></em> :</span></p></td>
<td>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</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>err</code></em> :</span></p></td>
<td>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</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the message was initialized correctly, <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise</td>
</tr>
</tbody>
</table></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="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>agent</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>msg</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> to build</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>buffer</code></em> :</span></p></td>
<td>The buffer to use in the <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>buffer_len</code></em> :</span></p></td>
<td>The length of the buffer</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>request</code></em> :</span></p></td>
<td>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</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The size of the message built</td>
</tr>
</tbody>
</table></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>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>agent</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>msg</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> to finish</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>key</code></em> :</span></p></td>
<td>The key to use for the MESSAGE-INTEGRITY attribute</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>key_len</code></em> :</span></p></td>
<td>The length of the <em class="parameter"><code>key</code></em>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The final size of the message built or 0 if an error occured
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Note</h3>
<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>
</td>
</tr>
</tbody>
</table></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>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>agent</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>id</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunMessage.html#StunTransactionId" title="StunTransactionId"><span class="type">StunTransactionId</span></a> of the transaction to forget</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the transaction was found, <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.0.6</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 WLM2009 compatibility modes.
</p>
<p>
</p>
<p>
</p>
<p>
</p>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Note</h3>
<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>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>agent</code></em> :</span></p></td>
<td>The <a class="link" href="libnice-StunAgent.html#StunAgent" title="StunAgent"><span class="type">StunAgent</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>software</code></em> :</span></p></td>
<td>The value of the SOFTWARE attribute to add.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.0.10</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>
</div>
<div class="refsect1">
<a name="libnice-StunAgent.see-also"></a><h2>See Also</h2>
<a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a>
</div>
</div>
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