1<html><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 V1.78.1"><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-mstamp-us-delta.html" title="skb_mstamp_us_delta"><link rel="next" href="API-skb-dst.html" title="skb_dst"></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">struct sk_buff</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-skb-mstamp-us-delta.html">Prev</a> </td><th width="60%" align="center">Socket Buffer Functions</th><td width="20%" align="right"> <a accesskey="n" href="API-skb-dst.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-struct-sk-buff"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>struct sk_buff — 2 socket buffer 3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="programlisting"> 4struct sk_buff { 5 union {unnamed_union}; 6 __u16 inner_transport_header; 7 __u16 inner_network_header; 8 __u16 inner_mac_header; 9 __be16 protocol; 10 __u16 transport_header; 11 __u16 network_header; 12 __u16 mac_header; 13 sk_buff_data_t tail; 14 sk_buff_data_t end; 15 unsigned char * head; 16 unsigned char * data; 17 unsigned int truesize; 18 atomic_t users; 19}; </pre></div><div class="refsect1"><a name="idp1092377956"></a><h2>Members</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term">{unnamed_union}</span></dt><dd><p> 20 anonymous 21 </p></dd><dt><span class="term">inner_transport_header</span></dt><dd><p> 22 Inner transport layer header (encapsulation) 23 </p></dd><dt><span class="term">inner_network_header</span></dt><dd><p> 24 Network layer header (encapsulation) 25 </p></dd><dt><span class="term">inner_mac_header</span></dt><dd><p> 26 Link layer header (encapsulation) 27 </p></dd><dt><span class="term">protocol</span></dt><dd><p> 28 Packet protocol from driver 29 </p></dd><dt><span class="term">transport_header</span></dt><dd><p> 30 Transport layer header 31 </p></dd><dt><span class="term">network_header</span></dt><dd><p> 32 Network layer header 33 </p></dd><dt><span class="term">mac_header</span></dt><dd><p> 34 Link layer header 35 </p></dd><dt><span class="term">tail</span></dt><dd><p> 36 Tail pointer 37 </p></dd><dt><span class="term">end</span></dt><dd><p> 38 End pointer 39 </p></dd><dt><span class="term">head</span></dt><dd><p> 40 Head of buffer 41 </p></dd><dt><span class="term">data</span></dt><dd><p> 42 Data head pointer 43 </p></dd><dt><span class="term">truesize</span></dt><dd><p> 44 Buffer size 45 </p></dd><dt><span class="term">users</span></dt><dd><p> 46 User count - see {datagram,tcp}.c 47 </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="API-skb-mstamp-us-delta.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="API-skb-dst.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">skb_mstamp_us_delta</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span class="phrase">skb_dst</span></td></tr></table></div></body></html> 48