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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>wimax_msg_send</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="Linux Networking and Network Devices APIs" /><link rel="up" href="ch01s06.html" title="WiMAX" /><link rel="prev" href="re182.html" title="wimax_msg_len" /><link rel="next" href="re184.html" title="wimax_msg" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>wimax_msg_send</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re182.html">Prev</a> </td><th width="60%" align="center">WiMAX</th><td width="20%" align="right"> <a accesskey="n" href="re184.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="wimax_msg_send"><a id="API-wimax-msg-send"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>wimax_msg_send —
Send a pre-allocated message to user space
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">int <b class="fsfunc">wimax_msg_send </b>(</code></td><td>struct wimax_dev * <var class="pdparam">wimax_dev</var>, </td></tr><tr><td> </td><td>struct sk_buff * <var class="pdparam">skb</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2745921"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>wimax_dev</code></em></span></dt><dd><p>
WiMAX device descriptor
</p></dd><dt><span class="term"><em class="parameter"><code>skb</code></em></span></dt><dd><p>
<span class="structname">struct sk_buff</span> returned by <code class="function">wimax_msg_alloc</code>. Note the
ownership of <em class="parameter"><code>skb</code></em> is transferred to this function.
</p></dd></dl></div></div><div class="refsect1" title="Returns"><a id="id2745981"></a><h2>Returns</h2><p>
0 if ok, < 0 errno code on error
</p></div><div class="refsect1" title="Description"><a id="id2745993"></a><h2>Description</h2><p>
</p><p>
Sends a free-form message that was preallocated with
<code class="function">wimax_msg_alloc</code> and filled up.
</p><p>
Assumes that once you pass an skb to this function for sending, it
owns it and will release it when done (on success).
</p></div><div class="refsect1" title="IMPORTANT"><a id="id2746016"></a><h2>IMPORTANT</h2><p>
</p><p>
Don't use <code class="function">skb_push</code>/<code class="function">skb_pull</code>/<code class="function">skb_reserve</code> on the skb, as
<code class="function">wimax_msg_send</code> depends on skb->data being placed at the
beginning of the user message.
</p><p>
Unlike other WiMAX stack calls, this call can be used way early,
even before <code class="function">wimax_dev_add</code> is called, as long as the
wimax_dev->net_dev pointer is set to point to a proper
net_dev. This is so that drivers can use it early in case they need
to send stuff around or communicate with user space.
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