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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>struct sk_buff</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="ch01s02.html" title="Socket Buffer Functions" /><link rel="prev" href="re04.html" title="struct skb_shared_tx" /><link rel="next" href="re06.html" title="skb_queue_empty" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>struct sk_buff</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re04.html">Prev</a> </td><th width="60%" align="center">Socket Buffer Functions</th><td width="20%" align="right"> <a accesskey="n" href="re06.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="struct sk_buff"><a id="API-struct-sk-buff"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>struct sk_buff —
socket buffer
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><pre class="programlisting">
struct sk_buff {
struct sk_buff * next;
struct sk_buff * prev;
struct sock * sk;
ktime_t tstamp;
struct net_device * dev;
unsigned long _skb_dst;
#ifdef CONFIG_XFRM
struct sec_path * sp;
#endif
char cb[48];
unsigned int len;
unsigned int data_len;
__u16 mac_len;
__u16 hdr_len;
union {unnamed_union};
__u16 vlan_tci;
#ifndef __GENKSYMS__
#endif
sk_buff_data_t transport_header;
sk_buff_data_t network_header;
sk_buff_data_t mac_header;
sk_buff_data_t tail;
sk_buff_data_t end;
unsigned char * head;
unsigned char * data;
unsigned int truesize;
atomic_t users;
}; </pre></div><div class="refsect1" title="Members"><a id="id2636660"></a><h2>Members</h2><div class="variablelist"><dl><dt><span class="term">next</span></dt><dd><p>
Next buffer in list
</p></dd><dt><span class="term">prev</span></dt><dd><p>
Previous buffer in list
</p></dd><dt><span class="term">sk</span></dt><dd><p>
Socket we are owned by
</p></dd><dt><span class="term">tstamp</span></dt><dd><p>
Time we arrived
</p></dd><dt><span class="term">dev</span></dt><dd><p>
Device we arrived on/are leaving by
</p></dd><dt><span class="term">_skb_dst</span></dt><dd><p>
destination entry
</p></dd><dt><span class="term">sp</span></dt><dd><p>
the security path, used for xfrm
</p></dd><dt><span class="term">cb[48]</span></dt><dd><p>
Control buffer. Free for use by every layer. Put private vars here
</p></dd><dt><span class="term">len</span></dt><dd><p>
Length of actual data
</p></dd><dt><span class="term">data_len</span></dt><dd><p>
Data length
</p></dd><dt><span class="term">mac_len</span></dt><dd><p>
Length of link layer header
</p></dd><dt><span class="term">hdr_len</span></dt><dd><p>
writable header length of cloned skb
</p></dd><dt><span class="term">{unnamed_union}</span></dt><dd><p>
anonymous
</p></dd><dt><span class="term">vlan_tci</span></dt><dd><p>
vlan tag control information
</p></dd><dt><span class="term">transport_header</span></dt><dd><p>
Transport layer header
</p></dd><dt><span class="term">network_header</span></dt><dd><p>
Network layer header
</p></dd><dt><span class="term">mac_header</span></dt><dd><p>
Link layer header
</p></dd><dt><span class="term">tail</span></dt><dd><p>
Tail pointer
</p></dd><dt><span class="term">end</span></dt><dd><p>
End pointer
</p></dd><dt><span class="term">head</span></dt><dd><p>
Head of buffer
</p></dd><dt><span class="term">data</span></dt><dd><p>
Data head pointer
</p></dd><dt><span class="term">truesize</span></dt><dd><p>
Buffer size
</p></dd><dt><span class="term">users</span></dt><dd><p>
User count - see {datagram,tcp}.c
</p></dd></dl></div></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re04.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch01s02.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re06.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>struct skb_shared_tx</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>skb_queue_empty</span></td></tr></table></div></body></html>
