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<a name="libnice-ICE"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle"><a name="libnice-ICE.top_of_page"></a>ICE</span></h2>
<p>ICE — STUN ICE Usage</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="libnice-ICE.stability-level"></a><h2>Stability Level</h2>
Stable, unless otherwise indicated
</div>
<div class="refsynopsisdiv">
<a name="libnice-ICE.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include <stun/usages/ice.h>
enum <a class="link" href="libnice-ICE.html#StunUsageIceCompatibility" title="enum StunUsageIceCompatibility">StunUsageIceCompatibility</a>;
enum <a class="link" href="libnice-ICE.html#StunUsageIceReturn" title="enum StunUsageIceReturn">StunUsageIceReturn</a>;
<span class="returnvalue">size_t</span> <a class="link" href="libnice-ICE.html#stun-usage-ice-conncheck-create" title="stun_usage_ice_conncheck_create ()">stun_usage_ice_conncheck_create</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 <span class="type">uint8_t</span> *username</code></em>,
<em class="parameter"><code>const <span class="type">size_t</span> username_len</code></em>,
<em class="parameter"><code>const <span class="type">uint8_t</span> *password</code></em>,
<em class="parameter"><code>const <span class="type">size_t</span> password_len</code></em>,
<em class="parameter"><code><span class="type">bool</span> cand_use</code></em>,
<em class="parameter"><code><span class="type">bool</span> controlling</code></em>,
<em class="parameter"><code><span class="type">uint32_t</span> priority</code></em>,
<em class="parameter"><code><span class="type">uint64_t</span> tie</code></em>,
<em class="parameter"><code>const <span class="type">char</span> *candidate_identifier</code></em>,
<em class="parameter"><code><a class="link" href="libnice-ICE.html#StunUsageIceCompatibility" title="enum StunUsageIceCompatibility"><span class="type">StunUsageIceCompatibility</span></a> compatibility</code></em>);
<a class="link" href="libnice-ICE.html#StunUsageIceReturn" title="enum StunUsageIceReturn"><span class="returnvalue">StunUsageIceReturn</span></a> <a class="link" href="libnice-ICE.html#stun-usage-ice-conncheck-process" title="stun_usage_ice_conncheck_process ()">stun_usage_ice_conncheck_process</a> (<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">struct sockaddr</span> *addr</code></em>,
<em class="parameter"><code><span class="type">socklen_t</span> *addrlen</code></em>,
<em class="parameter"><code><a class="link" href="libnice-ICE.html#StunUsageIceCompatibility" title="enum StunUsageIceCompatibility"><span class="type">StunUsageIceCompatibility</span></a> compatibility</code></em>);
<a class="link" href="libnice-ICE.html#StunUsageIceReturn" title="enum StunUsageIceReturn"><span class="returnvalue">StunUsageIceReturn</span></a> <a class="link" href="libnice-ICE.html#stun-usage-ice-conncheck-create-reply" title="stun_usage_ice_conncheck_create_reply ()">stun_usage_ice_conncheck_create_reply</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> *req</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> *buf</code></em>,
<em class="parameter"><code><span class="type">size_t</span> *plen</code></em>,
<em class="parameter"><code>const <span class="type">struct sockaddr</span> *src</code></em>,
<em class="parameter"><code><span class="type">socklen_t</span> srclen</code></em>,
<em class="parameter"><code><span class="type">bool</span> *control</code></em>,
<em class="parameter"><code><span class="type">uint64_t</span> tie</code></em>,
<em class="parameter"><code><a class="link" href="libnice-ICE.html#StunUsageIceCompatibility" title="enum StunUsageIceCompatibility"><span class="type">StunUsageIceCompatibility</span></a> compatibility</code></em>);
<span class="returnvalue">uint32_t</span> <a class="link" href="libnice-ICE.html#stun-usage-ice-conncheck-priority" title="stun_usage_ice_conncheck_priority ()">stun_usage_ice_conncheck_priority</a> (<em class="parameter"><code>const <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> *msg</code></em>);
<span class="returnvalue">bool</span> <a class="link" href="libnice-ICE.html#stun-usage-ice-conncheck-use-candidate" title="stun_usage_ice_conncheck_use_candidate ()">stun_usage_ice_conncheck_use_candidate</a>
(<em class="parameter"><code>const <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> *msg</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="libnice-ICE.description"></a><h2>Description</h2>
<p>
The STUN ICE usage allows for easily creating and parsing STUN Binding
requests and responses used for ICE connectivity checks. The API allows you
to create a connectivity check message, parse a response or create a reply
to an incoming connectivity check request.
</p>
</div>
<div class="refsect1">
<a name="libnice-ICE.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="StunUsageIceCompatibility"></a><h3>enum StunUsageIceCompatibility</h3>
<pre class="programlisting">typedef enum {
STUN_USAGE_ICE_COMPATIBILITY_RFC5245,
STUN_USAGE_ICE_COMPATIBILITY_GOOGLE,
STUN_USAGE_ICE_COMPATIBILITY_MSN,
STUN_USAGE_ICE_COMPATIBILITY_WLM2009,
STUN_USAGE_ICE_COMPATIBILITY_DRAFT19 = STUN_USAGE_ICE_COMPATIBILITY_RFC5245,
} StunUsageIceCompatibility;
</pre>
<p>
This enum defines which compatibility modes this ICE usage can use
</p>
<p>
</p>
<div class="warning" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Warning</h3>
<em class="parameter"><code>STUN_USAGE_ICE_COMPATIBILITY_DRAFT19</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_USAGE_ICE_COMPATIBILITY_RFC5245</code></em>
</div>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="STUN-USAGE-ICE-COMPATIBILITY-RFC5245:CAPS"></a><span class="term"><code class="literal">STUN_USAGE_ICE_COMPATIBILITY_RFC5245</code></span></p></td>
<td>The ICE compatibility with RFC 5245
</td>
</tr>
<tr>
<td><p><a name="STUN-USAGE-ICE-COMPATIBILITY-GOOGLE:CAPS"></a><span class="term"><code class="literal">STUN_USAGE_ICE_COMPATIBILITY_GOOGLE</code></span></p></td>
<td>The ICE compatibility with Google's
implementation of ICE
</td>
</tr>
<tr>
<td><p><a name="STUN-USAGE-ICE-COMPATIBILITY-MSN:CAPS"></a><span class="term"><code class="literal">STUN_USAGE_ICE_COMPATIBILITY_MSN</code></span></p></td>
<td>The ICE compatibility with MSN's
implementation of ICE
</td>
</tr>
<tr>
<td><p><a name="STUN-USAGE-ICE-COMPATIBILITY-WLM2009:CAPS"></a><span class="term"><code class="literal">STUN_USAGE_ICE_COMPATIBILITY_WLM2009</code></span></p></td>
<td>The ICE compatibility with Windows
Live Messenger and Microsoft Office Communicator 2007 R2 implementation of ICE
</td>
</tr>
<tr>
<td><p><a name="STUN-USAGE-ICE-COMPATIBILITY-DRAFT19:CAPS"></a><span class="term"><code class="literal">STUN_USAGE_ICE_COMPATIBILITY_DRAFT19</code></span></p></td>
<td>The ICE compatibility with draft 19
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="StunUsageIceReturn"></a><h3>enum StunUsageIceReturn</h3>
<pre class="programlisting">typedef enum {
STUN_USAGE_ICE_RETURN_SUCCESS,
STUN_USAGE_ICE_RETURN_ERROR,
STUN_USAGE_ICE_RETURN_INVALID,
STUN_USAGE_ICE_RETURN_ROLE_CONFLICT,
STUN_USAGE_ICE_RETURN_INVALID_REQUEST,
STUN_USAGE_ICE_RETURN_INVALID_METHOD,
STUN_USAGE_ICE_RETURN_MEMORY_ERROR,
STUN_USAGE_ICE_RETURN_INVALID_ADDRESS,
STUN_USAGE_ICE_RETURN_NO_MAPPED_ADDRESS,
} StunUsageIceReturn;
</pre>
<p>
Return value of <a class="link" href="libnice-ICE.html#stun-usage-ice-conncheck-process" title="stun_usage_ice_conncheck_process ()"><code class="function">stun_usage_ice_conncheck_process()</code></a> and
<a class="link" href="libnice-ICE.html#stun-usage-ice-conncheck-create-reply" title="stun_usage_ice_conncheck_create_reply ()"><code class="function">stun_usage_ice_conncheck_create_reply()</code></a> which allows you to see what
status the function call returned.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="STUN-USAGE-ICE-RETURN-SUCCESS:CAPS"></a><span class="term"><code class="literal">STUN_USAGE_ICE_RETURN_SUCCESS</code></span></p></td>
<td>The function succeeded
</td>
</tr>
<tr>
<td><p><a name="STUN-USAGE-ICE-RETURN-ERROR:CAPS"></a><span class="term"><code class="literal">STUN_USAGE_ICE_RETURN_ERROR</code></span></p></td>
<td>There was an unspecified error
</td>
</tr>
<tr>
<td><p><a name="STUN-USAGE-ICE-RETURN-INVALID:CAPS"></a><span class="term"><code class="literal">STUN_USAGE_ICE_RETURN_INVALID</code></span></p></td>
<td>The message is invalid for processing
</td>
</tr>
<tr>
<td><p><a name="STUN-USAGE-ICE-RETURN-ROLE-CONFLICT:CAPS"></a><span class="term"><code class="literal">STUN_USAGE_ICE_RETURN_ROLE_CONFLICT</code></span></p></td>
<td>A role conflict was detected
</td>
</tr>
<tr>
<td><p><a name="STUN-USAGE-ICE-RETURN-INVALID-REQUEST:CAPS"></a><span class="term"><code class="literal">STUN_USAGE_ICE_RETURN_INVALID_REQUEST</code></span></p></td>
<td>The message is an not a request
</td>
</tr>
<tr>
<td><p><a name="STUN-USAGE-ICE-RETURN-INVALID-METHOD:CAPS"></a><span class="term"><code class="literal">STUN_USAGE_ICE_RETURN_INVALID_METHOD</code></span></p></td>
<td>The method of the request is invalid
</td>
</tr>
<tr>
<td><p><a name="STUN-USAGE-ICE-RETURN-MEMORY-ERROR:CAPS"></a><span class="term"><code class="literal">STUN_USAGE_ICE_RETURN_MEMORY_ERROR</code></span></p></td>
<td>The buffer size is too small to hold
the STUN reply
</td>
</tr>
<tr>
<td><p><a name="STUN-USAGE-ICE-RETURN-INVALID-ADDRESS:CAPS"></a><span class="term"><code class="literal">STUN_USAGE_ICE_RETURN_INVALID_ADDRESS</code></span></p></td>
<td>The mapped address argument has
an invalid address family
</td>
</tr>
<tr>
<td><p><a name="STUN-USAGE-ICE-RETURN-NO-MAPPED-ADDRESS:CAPS"></a><span class="term"><code class="literal">STUN_USAGE_ICE_RETURN_NO_MAPPED_ADDRESS</code></span></p></td>
<td>The response is valid but no
MAPPED-ADDRESS or XOR-MAPPED-ADDRESS attribute was found
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="stun-usage-ice-conncheck-create"></a><h3>stun_usage_ice_conncheck_create ()</h3>
<pre class="programlisting"><span class="returnvalue">size_t</span> stun_usage_ice_conncheck_create (<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 <span class="type">uint8_t</span> *username</code></em>,
<em class="parameter"><code>const <span class="type">size_t</span> username_len</code></em>,
<em class="parameter"><code>const <span class="type">uint8_t</span> *password</code></em>,
<em class="parameter"><code>const <span class="type">size_t</span> password_len</code></em>,
<em class="parameter"><code><span class="type">bool</span> cand_use</code></em>,
<em class="parameter"><code><span class="type">bool</span> controlling</code></em>,
<em class="parameter"><code><span class="type">uint32_t</span> priority</code></em>,
<em class="parameter"><code><span class="type">uint64_t</span> tie</code></em>,
<em class="parameter"><code>const <span class="type">char</span> *candidate_identifier</code></em>,
<em class="parameter"><code><a class="link" href="libnice-ICE.html#StunUsageIceCompatibility" title="enum StunUsageIceCompatibility"><span class="type">StunUsageIceCompatibility</span></a> compatibility</code></em>);</pre>
<p>
Builds an ICE connectivity check STUN message.
If the compatibility is not <a class="link" href="libnice-ICE.html#STUN-USAGE-ICE-COMPATIBILITY-RFC5245:CAPS"><span class="type">STUN_USAGE_ICE_COMPATIBILITY_RFC5245</span></a>, the
<em class="parameter"><code>cand_use</code></em>, <em class="parameter"><code>controlling</code></em>, <em class="parameter"><code>priority</code></em> and <em class="parameter"><code>tie</code></em> arguments are not used.
If the compatibility is not <a class="link" href="libnice-ICE.html#STUN-USAGE-ICE-COMPATIBILITY-WLM2009:CAPS"><span class="type">STUN_USAGE_ICE_COMPATIBILITY_WLM2009</span></a>, the
<em class="parameter"><code>candidate_identifier</code></em> argument is not used.
</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 use to build the request</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 for creating 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 size of the <em class="parameter"><code>buffer</code></em>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>username</code></em> :</span></p></td>
<td>The username to use in the request</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 key to use for building the MESSAGE-INTEGRITY</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>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>cand_use</code></em> :</span></p></td>
<td>Set to <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> to append the USE-CANDIDATE flag to the request</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>controlling</code></em> :</span></p></td>
<td>Set to <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if you are the controlling agent or set to
<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> if you are the controlled agent.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>priority</code></em> :</span></p></td>
<td>The value of the PRIORITY attribute</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>tie</code></em> :</span></p></td>
<td>The value of the tie-breaker to put in the ICE-CONTROLLED or
ICE-CONTROLLING attribute</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>candidate_identifier</code></em> :</span></p></td>
<td>The foundation value to put in the
CANDIDATE-IDENTIFIER attribute</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>compatibility</code></em> :</span></p></td>
<td>The compatibility mode to use for building the conncheck
request</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The length of the message built.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="stun-usage-ice-conncheck-process"></a><h3>stun_usage_ice_conncheck_process ()</h3>
<pre class="programlisting"><a class="link" href="libnice-ICE.html#StunUsageIceReturn" title="enum StunUsageIceReturn"><span class="returnvalue">StunUsageIceReturn</span></a> stun_usage_ice_conncheck_process (<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">struct sockaddr</span> *addr</code></em>,
<em class="parameter"><code><span class="type">socklen_t</span> *addrlen</code></em>,
<em class="parameter"><code><a class="link" href="libnice-ICE.html#StunUsageIceCompatibility" title="enum StunUsageIceCompatibility"><span class="type">StunUsageIceCompatibility</span></a> compatibility</code></em>);</pre>
<p>
Process an ICE connectivity check STUN message and retreive the
mapped address from the message
</p>
<p> See also <a class="link" href="libnice-ICE.html#stun-usage-ice-conncheck-priority" title="stun_usage_ice_conncheck_priority ()"><code class="function">stun_usage_ice_conncheck_priority()</code></a> and
<a class="link" href="libnice-ICE.html#stun-usage-ice-conncheck-use-candidate" title="stun_usage_ice_conncheck_use_candidate ()"><code class="function">stun_usage_ice_conncheck_use_candidate()</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>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 process</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>addr</code></em> :</span></p></td>
<td>A pointer to a <span class="type">sockaddr</span> structure to fill with the mapped address
that the STUN connectivity check response contains</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>addrlen</code></em> :</span></p></td>
<td>The length of <em class="parameter"><code>addr</code></em>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>compatibility</code></em> :</span></p></td>
<td>The compatibility mode to use for processing the conncheck
response</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-ICE.html#StunUsageIceReturn" title="enum StunUsageIceReturn"><span class="type">StunUsageIceReturn</span></a> value</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="stun-usage-ice-conncheck-create-reply"></a><h3>stun_usage_ice_conncheck_create_reply ()</h3>
<pre class="programlisting"><a class="link" href="libnice-ICE.html#StunUsageIceReturn" title="enum StunUsageIceReturn"><span class="returnvalue">StunUsageIceReturn</span></a> stun_usage_ice_conncheck_create_reply
(<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> *req</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> *buf</code></em>,
<em class="parameter"><code><span class="type">size_t</span> *plen</code></em>,
<em class="parameter"><code>const <span class="type">struct sockaddr</span> *src</code></em>,
<em class="parameter"><code><span class="type">socklen_t</span> srclen</code></em>,
<em class="parameter"><code><span class="type">bool</span> *control</code></em>,
<em class="parameter"><code><span class="type">uint64_t</span> tie</code></em>,
<em class="parameter"><code><a class="link" href="libnice-ICE.html#StunUsageIceCompatibility" title="enum StunUsageIceCompatibility"><span class="type">StunUsageIceCompatibility</span></a> compatibility</code></em>);</pre>
<p>
Tries to parse a STUN connectivity check request and builds a
response accordingly.
</p>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Note</h3>
<p>
In case of error, the <em class="parameter"><code>msg</code></em> is filled with the appropriate error response
to be sent and the value of <em class="parameter"><code>plen</code></em> is set to the size of that message.
If <em class="parameter"><code>plen</code></em> has a size of 0, then no error response should be sent.
</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 use to build the response</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>req</code></em> :</span></p></td>
<td>The original STUN request to reply to</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>buf</code></em> :</span></p></td>
<td>The buffer to use for creating 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>plen</code></em> :</span></p></td>
<td>A pointer containing the size of the <em class="parameter"><code>buffer</code></em> on input.
Will contain the length of the message built on output.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>src</code></em> :</span></p></td>
<td>A pointer to a <span class="type">sockaddr</span> structure containing the source address from
which the request was received. Will be used as the mapped address in the
response</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>srclen</code></em> :</span></p></td>
<td>The length of <em class="parameter"><code>addr</code></em>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>control</code></em> :</span></p></td>
<td>Set to <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if you are the controlling agent or set to
<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> if you are the controlled agent.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>tie</code></em> :</span></p></td>
<td>The value of the tie-breaker to put in the ICE-CONTROLLED or
ICE-CONTROLLING attribute</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>compatibility</code></em> :</span></p></td>
<td>The compatibility mode to use for building the conncheck
response</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-ICE.html#StunUsageIceReturn" title="enum StunUsageIceReturn"><span class="type">StunUsageIceReturn</span></a> value</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="stun-usage-ice-conncheck-priority"></a><h3>stun_usage_ice_conncheck_priority ()</h3>
<pre class="programlisting"><span class="returnvalue">uint32_t</span> stun_usage_ice_conncheck_priority (<em class="parameter"><code>const <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> *msg</code></em>);</pre>
<p>
Extracts the priority from a STUN message.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<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 parse</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>host byte order priority, or 0 if not specified.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="stun-usage-ice-conncheck-use-candidate"></a><h3>stun_usage_ice_conncheck_use_candidate ()</h3>
<pre class="programlisting"><span class="returnvalue">bool</span> stun_usage_ice_conncheck_use_candidate
(<em class="parameter"><code>const <a class="link" href="libnice-StunMessage.html#StunMessage" title="struct StunMessage"><span class="type">StunMessage</span></a> *msg</code></em>);</pre>
<p>
Extracts the USE-CANDIDATE attribute flag from a STUN message.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<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 parse</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 flag is set, <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> if not.</td>
</tr>
</tbody>
</table></div>
</div>
</div>
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