1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>skb_peek</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux Networking and Network Devices APIs"><link rel="up" href="ch01s02.html" title="Socket Buffer Functions"><link rel="prev" href="API-skb-unshare.html" title="skb_unshare"><link rel="next" href="API-skb-peek-next.html" title="skb_peek_next"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">skb_peek</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-skb-unshare.html">Prev</a>&#160;</td><th width="60%" align="center">Socket Buffer Functions</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-skb-peek-next.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-skb-peek"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>skb_peek &#8212; 
2     peek at the head of an <span class="structname">sk_buff_head</span>
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">struct sk_buff * <b class="fsfunc">skb_peek </b>(</code></td><td>const struct sk_buff_head * <var class="pdparam">list_</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1095394516"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>list_</code></em></span></dt><dd><p>
4     list to peek at
5    </p></dd></dl></div></div><div class="refsect1"><a name="idp1095396044"></a><h2>Description</h2><p>
6   Peek an <span class="structname">sk_buff</span>. Unlike most other operations you _MUST_
7   be careful with this one. A peek leaves the buffer on the
8   list and someone else may run off with it. You must hold
9   the appropriate locks or have a private queue to do this.
10   </p><p>
11
12   Returns <code class="constant">NULL</code> for an empty list or a pointer to the head element.
13   The reference count is not incremented and the reference is therefore
14   volatile. Use with caution.
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