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<div id="projectname">lwIP
&#160;<span id="projectnumber">2.1.2</span>
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<div id="projectbrief">Lightweight IP stack</div>
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<a href="#define-members">Macros</a> &#124;
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<div class="textblock"><code>#include &quot;<a class="el" href="opt_8h.html">lwip/opt.h</a>&quot;</code><br />
<code>#include &quot;<a class="el" href="err_8h.html">lwip/err.h</a>&quot;</code><br />
<code>#include &quot;<a class="el" href="timeouts_8h.html">lwip/timeouts.h</a>&quot;</code><br />
<code>#include &quot;<a class="el" href="netif_8h.html">lwip/netif.h</a>&quot;</code><br />
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>
Macros</h2></td></tr>
<tr class="memitem:a4700525e737fc025fea4887b172e0c95"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="tcpip_8h.html#a4700525e737fc025fea4887b172e0c95">LOCK_TCPIP_CORE</a>()&#160;&#160;&#160;<a class="el" href="group__sys__mutex.html#ga4d4eb9afe5965fa2661dd54ff55d616a">sys_mutex_lock</a>(&amp;<a class="el" href="tcpip_8h.html#acd7be2108e9a47fd8f1ab0a49f76241d">lock_tcpip_core</a>)</td></tr>
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<tr class="memitem:a915effea029b9c4891e1ec635eb1826d"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="tcpip_8h.html#a915effea029b9c4891e1ec635eb1826d">UNLOCK_TCPIP_CORE</a>()&#160;&#160;&#160;<a class="el" href="group__sys__mutex.html#ga5568f68898fe9d5735f9ce2f665624fb">sys_mutex_unlock</a>(&amp;<a class="el" href="tcpip_8h.html#acd7be2108e9a47fd8f1ab0a49f76241d">lock_tcpip_core</a>)</td></tr>
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<tr class="memitem:gacd0a865623921ada2dd08962eb82c9df"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__lwip__os.html#gacd0a865623921ada2dd08962eb82c9df">tcpip_callback_with_block</a>(function, ctx, block)&#160;&#160;&#160;((block != 0)? <a class="el" href="group__lwip__os.html#gaab838fe3417ab3a1f61f0728009a0c2a">tcpip_callback</a>(function, ctx) : <a class="el" href="group__lwip__os.html#gaeb7b3c7414c76ad8dde14d2fba6cb020">tcpip_try_callback</a>(function, ctx))</td></tr>
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Typedefs</h2></td></tr>
<tr class="memitem:a5fe07216c441e27c3028bcac60fa0992"><td class="memItemLeft" align="right" valign="top">typedef void(*&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="tcpip_8h.html#a5fe07216c441e27c3028bcac60fa0992">tcpip_init_done_fn</a>) (void *arg)</td></tr>
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<tr class="memitem:a35203296bb838f3b493839ffc6e7285d"><td class="memItemLeft" align="right" valign="top">typedef void(*&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="tcpip_8h.html#a35203296bb838f3b493839ffc6e7285d">tcpip_callback_fn</a>) (void *ctx)</td></tr>
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Functions</h2></td></tr>
<tr class="memitem:ga1f3a88b8df6ba3b9ed1c00e0a305e3db"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__lwip__os.html#ga1f3a88b8df6ba3b9ed1c00e0a305e3db">tcpip_init</a> (<a class="el" href="tcpip_8h.html#a5fe07216c441e27c3028bcac60fa0992">tcpip_init_done_fn</a> tcpip_init_done, void *arg)</td></tr>
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<tr class="memitem:gaeb7b3c7414c76ad8dde14d2fba6cb020"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__lwip__os.html#gaeb7b3c7414c76ad8dde14d2fba6cb020">tcpip_try_callback</a> (<a class="el" href="tcpip_8h.html#a35203296bb838f3b493839ffc6e7285d">tcpip_callback_fn</a> function, void *ctx)</td></tr>
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<tr class="memitem:gaab838fe3417ab3a1f61f0728009a0c2a"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__lwip__os.html#gaab838fe3417ab3a1f61f0728009a0c2a">tcpip_callback</a> (<a class="el" href="tcpip_8h.html#a35203296bb838f3b493839ffc6e7285d">tcpip_callback_fn</a> function, void *ctx)</td></tr>
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<tr class="memitem:gaee14fa2587a9ba9d23e4c7e16c4526ac"><td class="memItemLeft" align="right" valign="top">struct tcpip_callback_msg *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__lwip__os.html#gaee14fa2587a9ba9d23e4c7e16c4526ac">tcpip_callbackmsg_new</a> (<a class="el" href="tcpip_8h.html#a35203296bb838f3b493839ffc6e7285d">tcpip_callback_fn</a> function, void *ctx)</td></tr>
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<tr class="memitem:gac5b7a59f4c3f5f721ab9ee81f231c9fd"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__lwip__os.html#gac5b7a59f4c3f5f721ab9ee81f231c9fd">tcpip_callbackmsg_delete</a> (struct tcpip_callback_msg *msg)</td></tr>
<tr class="separator:gac5b7a59f4c3f5f721ab9ee81f231c9fd"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga83fe5fb2ea33e8c262567ac46f4db3f8"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__lwip__os.html#ga83fe5fb2ea33e8c262567ac46f4db3f8">tcpip_callbackmsg_trycallback</a> (struct tcpip_callback_msg *msg)</td></tr>
<tr class="separator:ga83fe5fb2ea33e8c262567ac46f4db3f8"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga56a234f3d895791225c3c850bfadb666"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__lwip__os.html#ga56a234f3d895791225c3c850bfadb666">tcpip_callbackmsg_trycallback_fromisr</a> (struct tcpip_callback_msg *msg)</td></tr>
<tr class="separator:ga56a234f3d895791225c3c850bfadb666"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a5cdcb6b784fe0e8736a5b31a5cfbed6c"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="tcpip_8h.html#a5cdcb6b784fe0e8736a5b31a5cfbed6c">pbuf_free_callback</a> (struct <a class="el" href="structpbuf.html">pbuf</a> *p)</td></tr>
<tr class="separator:a5cdcb6b784fe0e8736a5b31a5cfbed6c"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a55b4de3765c6a37b3f2b26a11603771c"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="tcpip_8h.html#a55b4de3765c6a37b3f2b26a11603771c">mem_free_callback</a> (void *m)</td></tr>
<tr class="separator:a55b4de3765c6a37b3f2b26a11603771c"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="var-members"></a>
Variables</h2></td></tr>
<tr class="memitem:acd7be2108e9a47fd8f1ab0a49f76241d"><td class="memItemLeft" align="right" valign="top">sys_mutex_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="tcpip_8h.html#acd7be2108e9a47fd8f1ab0a49f76241d">lock_tcpip_core</a></td></tr>
<tr class="separator:acd7be2108e9a47fd8f1ab0a49f76241d"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Functions to sync with TCPIP thread </p>
</div><h2 class="groupheader">Macro Definition Documentation</h2>
<a id="a4700525e737fc025fea4887b172e0c95"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a4700525e737fc025fea4887b172e0c95">&#9670;&nbsp;</a></span>LOCK_TCPIP_CORE</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">#define LOCK_TCPIP_CORE</td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td>&#160;&#160;&#160;<a class="el" href="group__sys__mutex.html#ga4d4eb9afe5965fa2661dd54ff55d616a">sys_mutex_lock</a>(&amp;<a class="el" href="tcpip_8h.html#acd7be2108e9a47fd8f1ab0a49f76241d">lock_tcpip_core</a>)</td>
</tr>
</table>
</div><div class="memdoc">
<p>Lock lwIP core mutex (needs <a class="el" href="group__lwip__opts__lock.html#ga8e46232794349c209e8ed4e9e7e4f011">LWIP_TCPIP_CORE_LOCKING</a> 1) </p>
</div>
</div>
<a id="a915effea029b9c4891e1ec635eb1826d"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a915effea029b9c4891e1ec635eb1826d">&#9670;&nbsp;</a></span>UNLOCK_TCPIP_CORE</h2>
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<td class="memname">#define UNLOCK_TCPIP_CORE</td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td>&#160;&#160;&#160;<a class="el" href="group__sys__mutex.html#ga5568f68898fe9d5735f9ce2f665624fb">sys_mutex_unlock</a>(&amp;<a class="el" href="tcpip_8h.html#acd7be2108e9a47fd8f1ab0a49f76241d">lock_tcpip_core</a>)</td>
</tr>
</table>
</div><div class="memdoc">
<p>Unlock lwIP core mutex (needs <a class="el" href="group__lwip__opts__lock.html#ga8e46232794349c209e8ed4e9e7e4f011">LWIP_TCPIP_CORE_LOCKING</a> 1) </p>
</div>
</div>
<h2 class="groupheader">Typedef Documentation</h2>
<a id="a35203296bb838f3b493839ffc6e7285d"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a35203296bb838f3b493839ffc6e7285d">&#9670;&nbsp;</a></span>tcpip_callback_fn</h2>
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<td class="memname">typedef void(* tcpip_callback_fn) (void *ctx)</td>
</tr>
</table>
</div><div class="memdoc">
<p>Function prototype for functions passed to <a class="el" href="group__lwip__os.html#gaab838fe3417ab3a1f61f0728009a0c2a">tcpip_callback()</a> </p>
</div>
</div>
<a id="a5fe07216c441e27c3028bcac60fa0992"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a5fe07216c441e27c3028bcac60fa0992">&#9670;&nbsp;</a></span>tcpip_init_done_fn</h2>
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<td class="memname">typedef void(* tcpip_init_done_fn) (void *arg)</td>
</tr>
</table>
</div><div class="memdoc">
<p>Function prototype for the init_done function passed to tcpip_init </p>
</div>
</div>
<h2 class="groupheader">Function Documentation</h2>
<a id="a55b4de3765c6a37b3f2b26a11603771c"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a55b4de3765c6a37b3f2b26a11603771c">&#9670;&nbsp;</a></span>mem_free_callback()</h2>
<div class="memitem">
<div class="memproto">
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<td class="memname"><a class="el" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a> mem_free_callback </td>
<td>(</td>
<td class="paramtype">void *&#160;</td>
<td class="paramname"><em>m</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>A simple wrapper function that allows you to free heap memory from interrupt context.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">m</td><td>the heap memory to free </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>ERR_OK if callback could be enqueued, an err_t if not </dd></dl>
</div>
</div>
<a id="a5cdcb6b784fe0e8736a5b31a5cfbed6c"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a5cdcb6b784fe0e8736a5b31a5cfbed6c">&#9670;&nbsp;</a></span>pbuf_free_callback()</h2>
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<td class="memname"><a class="el" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a> pbuf_free_callback </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structpbuf.html">pbuf</a> *&#160;</td>
<td class="paramname"><em>p</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>A simple wrapper function that allows you to free a pbuf from interrupt context.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">p</td><td>The pbuf (chain) to be dereferenced. </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>ERR_OK if callback could be enqueued, an err_t if not </dd></dl>
</div>
</div>
<a id="a93043b3c66dbe4a15a60299c6199d102"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a93043b3c66dbe4a15a60299c6199d102">&#9670;&nbsp;</a></span>tcpip_inpkt()</h2>
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<td class="memname"><a class="el" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a> tcpip_inpkt </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structpbuf.html">pbuf</a> *&#160;</td>
<td class="paramname"><em>p</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">struct <a class="el" href="structnetif.html">netif</a> *&#160;</td>
<td class="paramname"><em>inp</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="netif_8h.html#ab2302b1b64ac7b95f24c6bab754a575e">netif_input_fn</a>&#160;</td>
<td class="paramname"><em>input_fn</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
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<p>Pass a received packet to tcpip_thread for input processing</p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">p</td><td>the received packet </td></tr>
<tr><td class="paramname">inp</td><td>the network interface on which the packet was received </td></tr>
<tr><td class="paramname">input_fn</td><td>input function to call </td></tr>
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<h2 class="groupheader">Variable Documentation</h2>
<a id="acd7be2108e9a47fd8f1ab0a49f76241d"></a>
<h2 class="memtitle"><span class="permalink"><a href="#acd7be2108e9a47fd8f1ab0a49f76241d">&#9670;&nbsp;</a></span>lock_tcpip_core</h2>
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<td class="memname">sys_mutex_t lock_tcpip_core</td>
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<p>The global semaphore to lock the stack. </p>
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