| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
| <html xmlns="http://www.w3.org/1999/xhtml" lang="en-US"> |
| <head> |
| <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> |
| <meta http-equiv="X-UA-Compatible" content="IE=11"/> |
| <meta name="generator" content="Doxygen 1.12.0"/> |
| <meta name="viewport" content="width=device-width, initial-scale=1"/> |
| <title>lwIP: src/include/lwip/inet_chksum.h File Reference</title> |
| <link href="tabs.css" rel="stylesheet" type="text/css"/> |
| <script type="text/javascript" src="jquery.js"></script> |
| <script type="text/javascript" src="dynsections.js"></script> |
| <script type="text/javascript" src="clipboard.js"></script> |
| <link href="navtree.css" rel="stylesheet" type="text/css"/> |
| <script type="text/javascript" src="navtreedata.js"></script> |
| <script type="text/javascript" src="navtree.js"></script> |
| <script type="text/javascript" src="resize.js"></script> |
| <script type="text/javascript" src="cookie.js"></script> |
| <link href="search/search.css" rel="stylesheet" type="text/css"/> |
| <script type="text/javascript" src="search/searchdata.js"></script> |
| <script type="text/javascript" src="search/search.js"></script> |
| <link href="doxygen.css" rel="stylesheet" type="text/css" /> |
| </head> |
| <body> |
| <div id="top"><!-- do not remove this div, it is closed by doxygen! --> |
| <div id="titlearea"> |
| <table cellspacing="0" cellpadding="0"> |
| <tbody> |
| <tr id="projectrow"> |
| <td id="projectalign"> |
| <div id="projectname">lwIP<span id="projectnumber"> 2.1.3</span> |
| </div> |
| <div id="projectbrief">Lightweight IP stack</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <!-- end header part --> |
| <!-- Generated by Doxygen 1.12.0 --> |
| <script type="text/javascript"> |
| /* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&dn=expat.txt MIT */ |
| var searchBox = new SearchBox("searchBox", "search/",'.html'); |
| /* @license-end */ |
| </script> |
| <script type="text/javascript"> |
| /* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&dn=expat.txt MIT */ |
| $(function() { codefold.init(0); }); |
| /* @license-end */ |
| </script> |
| <script type="text/javascript" src="menudata.js"></script> |
| <script type="text/javascript" src="menu.js"></script> |
| <script type="text/javascript"> |
| /* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&dn=expat.txt MIT */ |
| $(function() { |
| initMenu('',true,false,'search.php','Search',true); |
| $(function() { init_search(); }); |
| }); |
| /* @license-end */ |
| </script> |
| <div id="main-nav"></div> |
| </div><!-- top --> |
| <div id="side-nav" class="ui-resizable side-nav-resizable"> |
| <div id="nav-tree"> |
| <div id="nav-tree-contents"> |
| <div id="nav-sync" class="sync"></div> |
| </div> |
| </div> |
| <div id="splitbar" style="-moz-user-select:none;" |
| class="ui-resizable-handle"> |
| </div> |
| </div> |
| <script type="text/javascript"> |
| /* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&dn=expat.txt MIT */ |
| $(function(){initNavTree('inet__chksum_8h.html',''); initResizable(true); }); |
| /* @license-end */ |
| </script> |
| <div id="doc-content"> |
| <!-- window showing the filter options --> |
| <div id="MSearchSelectWindow" |
| onmouseover="return searchBox.OnSearchSelectShow()" |
| onmouseout="return searchBox.OnSearchSelectHide()" |
| onkeydown="return searchBox.OnSearchSelectKey(event)"> |
| </div> |
| |
| <!-- iframe showing the search results (closed by default) --> |
| <div id="MSearchResultsWindow"> |
| <div id="MSearchResults"> |
| <div class="SRPage"> |
| <div id="SRIndex"> |
| <div id="SRResults"></div> |
| <div class="SRStatus" id="Loading">Loading...</div> |
| <div class="SRStatus" id="Searching">Searching...</div> |
| <div class="SRStatus" id="NoMatches">No Matches</div> |
| </div> |
| </div> |
| </div> |
| </div> |
| |
| <div class="header"> |
| <div class="summary"> |
| <a href="#define-members">Macros</a> | |
| <a href="#func-members">Functions</a> </div> |
| <div class="headertitle"><div class="title">inet_chksum.h File Reference</div></div> |
| </div><!--header--> |
| <div class="contents"> |
| <div class="textblock"><code>#include "<a class="el" href="opt_8h.html">lwip/opt.h</a>"</code><br /> |
| <code>#include "<a class="el" href="pbuf_8h.html">lwip/pbuf.h</a>"</code><br /> |
| <code>#include "<a class="el" href="ip__addr_8h.html">lwip/ip_addr.h</a>"</code><br /> |
| </div><table class="memberdecls"> |
| <tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="define-members" name="define-members"></a> |
| Macros</h2></td></tr> |
| <tr class="memitem:a0196bd603262882d16b5264b52eafe18" id="r_a0196bd603262882d16b5264b52eafe18"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="#a0196bd603262882d16b5264b52eafe18">SWAP_BYTES_IN_WORD</a>(w)</td></tr> |
| <tr class="separator:a0196bd603262882d16b5264b52eafe18"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:a6ffe83b4bdd1784a0671ee4778966a01" id="r_a6ffe83b4bdd1784a0671ee4778966a01"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="#a6ffe83b4bdd1784a0671ee4778966a01">FOLD_U32T</a>(u)</td></tr> |
| <tr class="separator:a6ffe83b4bdd1784a0671ee4778966a01"><td class="memSeparator" colspan="2"> </td></tr> |
| </table><table class="memberdecls"> |
| <tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="func-members" name="func-members"></a> |
| Functions</h2></td></tr> |
| <tr class="memitem:ab35967a50418358e194e8f80fdc3c865" id="r_ab35967a50418358e194e8f80fdc3c865"><td class="memItemLeft" align="right" valign="top">u16_t </td><td class="memItemRight" valign="bottom"><a class="el" href="#ab35967a50418358e194e8f80fdc3c865">inet_chksum_pbuf</a> (struct <a class="el" href="structpbuf.html">pbuf</a> *p)</td></tr> |
| <tr class="separator:ab35967a50418358e194e8f80fdc3c865"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:a102544bca5912c78649e25a45a7d0a88" id="r_a102544bca5912c78649e25a45a7d0a88"><td class="memItemLeft" align="right" valign="top">u16_t </td><td class="memItemRight" valign="bottom"><a class="el" href="#a102544bca5912c78649e25a45a7d0a88">ip6_chksum_pseudo</a> (struct <a class="el" href="structpbuf.html">pbuf</a> *p, u8_t proto, u16_t proto_len, const <a class="el" href="ip6__addr_8h.html#aaca9e796e93a355294c4954c08d01762">ip6_addr_t</a> *src, const <a class="el" href="ip6__addr_8h.html#aaca9e796e93a355294c4954c08d01762">ip6_addr_t</a> *dest)</td></tr> |
| <tr class="separator:a102544bca5912c78649e25a45a7d0a88"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:ae4218e08510fd92c9a699c4e5d9fc17b" id="r_ae4218e08510fd92c9a699c4e5d9fc17b"><td class="memItemLeft" align="right" valign="top">u16_t </td><td class="memItemRight" valign="bottom"><a class="el" href="#ae4218e08510fd92c9a699c4e5d9fc17b">ip6_chksum_pseudo_partial</a> (struct <a class="el" href="structpbuf.html">pbuf</a> *p, u8_t proto, u16_t proto_len, u16_t chksum_len, const <a class="el" href="ip6__addr_8h.html#aaca9e796e93a355294c4954c08d01762">ip6_addr_t</a> *src, const <a class="el" href="ip6__addr_8h.html#aaca9e796e93a355294c4954c08d01762">ip6_addr_t</a> *dest)</td></tr> |
| <tr class="separator:ae4218e08510fd92c9a699c4e5d9fc17b"><td class="memSeparator" colspan="2"> </td></tr> |
| </table> |
| <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2> |
| <div class="textblock"><p>IP checksum calculation functions </p> |
| </div><h2 class="groupheader">Macro Definition Documentation</h2> |
| <a id="a6ffe83b4bdd1784a0671ee4778966a01" name="a6ffe83b4bdd1784a0671ee4778966a01"></a> |
| <h2 class="memtitle"><span class="permalink"><a href="#a6ffe83b4bdd1784a0671ee4778966a01">◆ </a></span>FOLD_U32T</h2> |
| |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">#define FOLD_U32T</td> |
| <td>(</td> |
| <td class="paramtype"></td> <td class="paramname"><span class="paramname"><em>u</em></span></td><td>)</td> |
| <td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| <b>Value:</b><div class="fragment"><div class="line">((u32_t)(((u) >> 16) + ((u) & 0x0000ffffUL)))</div> |
| </div><!-- fragment --><p>Split an u32_t in two u16_ts and add them up </p> |
| |
| </div> |
| </div> |
| <a id="a0196bd603262882d16b5264b52eafe18" name="a0196bd603262882d16b5264b52eafe18"></a> |
| <h2 class="memtitle"><span class="permalink"><a href="#a0196bd603262882d16b5264b52eafe18">◆ </a></span>SWAP_BYTES_IN_WORD</h2> |
| |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">#define SWAP_BYTES_IN_WORD</td> |
| <td>(</td> |
| <td class="paramtype"></td> <td class="paramname"><span class="paramname"><em>w</em></span></td><td>)</td> |
| <td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| <b>Value:</b><div class="fragment"><div class="line">(((w) & 0xff) << 8) | (((w) & 0xff00) >> 8)</div> |
| </div><!-- fragment --><p>Swap the bytes in an u16_t: much like <a class="el" href="def_8c.html#ad637280639de4066392e6b5614fa3e56">lwip_htons()</a> for little-endian </p> |
| |
| </div> |
| </div> |
| <h2 class="groupheader">Function Documentation</h2> |
| <a id="ab35967a50418358e194e8f80fdc3c865" name="ab35967a50418358e194e8f80fdc3c865"></a> |
| <h2 class="memtitle"><span class="permalink"><a href="#ab35967a50418358e194e8f80fdc3c865">◆ </a></span>inet_chksum_pbuf()</h2> |
| |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">u16_t inet_chksum_pbuf </td> |
| <td>(</td> |
| <td class="paramtype">struct <a class="el" href="structpbuf.html">pbuf</a> *</td> <td class="paramname"><span class="paramname"><em>p</em></span></td><td>)</td> |
| <td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| <p>Calculate a checksum over a chain of pbufs (without pseudo-header, much like inet_chksum only pbufs are used).</p> |
| <dl class="params"><dt>Parameters</dt><dd> |
| <table class="params"> |
| <tr><td class="paramname">p</td><td>pbuf chain over that the checksum should be calculated </td></tr> |
| </table> |
| </dd> |
| </dl> |
| <dl class="section return"><dt>Returns</dt><dd>checksum (as u16_t) to be saved directly in the protocol header </dd></dl> |
| |
| </div> |
| </div> |
| <a id="a102544bca5912c78649e25a45a7d0a88" name="a102544bca5912c78649e25a45a7d0a88"></a> |
| <h2 class="memtitle"><span class="permalink"><a href="#a102544bca5912c78649e25a45a7d0a88">◆ </a></span>ip6_chksum_pseudo()</h2> |
| |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">u16_t ip6_chksum_pseudo </td> |
| <td>(</td> |
| <td class="paramtype">struct <a class="el" href="structpbuf.html">pbuf</a> *</td> <td class="paramname"><span class="paramname"><em>p</em></span>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">u8_t</td> <td class="paramname"><span class="paramname"><em>proto</em></span>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">u16_t</td> <td class="paramname"><span class="paramname"><em>proto_len</em></span>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">const <a class="el" href="ip6__addr_8h.html#aaca9e796e93a355294c4954c08d01762">ip6_addr_t</a> *</td> <td class="paramname"><span class="paramname"><em>src</em></span>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">const <a class="el" href="ip6__addr_8h.html#aaca9e796e93a355294c4954c08d01762">ip6_addr_t</a> *</td> <td class="paramname"><span class="paramname"><em>dest</em></span> )</td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| <p>Calculates the checksum with IPv6 pseudo header used by TCP and UDP for a pbuf chain. IPv6 addresses are expected to be in network byte order.</p> |
| <dl class="params"><dt>Parameters</dt><dd> |
| <table class="params"> |
| <tr><td class="paramname">p</td><td>chain of pbufs over that a checksum should be calculated (ip data part) </td></tr> |
| <tr><td class="paramname">proto</td><td>ipv6 protocol/next header (used for checksum of pseudo header) </td></tr> |
| <tr><td class="paramname">proto_len</td><td>length of the ipv6 payload (used for checksum of pseudo header) </td></tr> |
| <tr><td class="paramname">src</td><td>source ipv6 address (used for checksum of pseudo header) </td></tr> |
| <tr><td class="paramname">dest</td><td>destination ipv6 address (used for checksum of pseudo header) </td></tr> |
| </table> |
| </dd> |
| </dl> |
| <dl class="section return"><dt>Returns</dt><dd>checksum (as u16_t) to be saved directly in the protocol header </dd></dl> |
| |
| </div> |
| </div> |
| <a id="ae4218e08510fd92c9a699c4e5d9fc17b" name="ae4218e08510fd92c9a699c4e5d9fc17b"></a> |
| <h2 class="memtitle"><span class="permalink"><a href="#ae4218e08510fd92c9a699c4e5d9fc17b">◆ </a></span>ip6_chksum_pseudo_partial()</h2> |
| |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">u16_t ip6_chksum_pseudo_partial </td> |
| <td>(</td> |
| <td class="paramtype">struct <a class="el" href="structpbuf.html">pbuf</a> *</td> <td class="paramname"><span class="paramname"><em>p</em></span>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">u8_t</td> <td class="paramname"><span class="paramname"><em>proto</em></span>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">u16_t</td> <td class="paramname"><span class="paramname"><em>proto_len</em></span>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">u16_t</td> <td class="paramname"><span class="paramname"><em>chksum_len</em></span>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">const <a class="el" href="ip6__addr_8h.html#aaca9e796e93a355294c4954c08d01762">ip6_addr_t</a> *</td> <td class="paramname"><span class="paramname"><em>src</em></span>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">const <a class="el" href="ip6__addr_8h.html#aaca9e796e93a355294c4954c08d01762">ip6_addr_t</a> *</td> <td class="paramname"><span class="paramname"><em>dest</em></span> )</td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| <p>Calculates the checksum with IPv6 pseudo header used by TCP and UDP for a pbuf chain. IPv6 addresses are expected to be in network byte order. Will only compute for a portion of the payload.</p> |
| <dl class="params"><dt>Parameters</dt><dd> |
| <table class="params"> |
| <tr><td class="paramname">p</td><td>chain of pbufs over that a checksum should be calculated (ip data part) </td></tr> |
| <tr><td class="paramname">proto</td><td>ipv6 protocol/next header (used for checksum of pseudo header) </td></tr> |
| <tr><td class="paramname">proto_len</td><td>length of the ipv6 payload (used for checksum of pseudo header) </td></tr> |
| <tr><td class="paramname">chksum_len</td><td>number of payload bytes used to compute chksum </td></tr> |
| <tr><td class="paramname">src</td><td>source ipv6 address (used for checksum of pseudo header) </td></tr> |
| <tr><td class="paramname">dest</td><td>destination ipv6 address (used for checksum of pseudo header) </td></tr> |
| </table> |
| </dd> |
| </dl> |
| <dl class="section return"><dt>Returns</dt><dd>checksum (as u16_t) to be saved directly in the protocol header </dd></dl> |
| |
| </div> |
| </div> |
| </div><!-- contents --> |
| </div><!-- doc-content --> |
| <!-- start footer part --> |
| <div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> |
| <ul> |
| <li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li><li class="navelem"><a class="el" href="dir_b0856f6b0d80ccb263b2f415c91f9e17.html">include</a></li><li class="navelem"><a class="el" href="dir_4e6b3cf33a61b6caac9c8ac30c866f37.html">lwip</a></li><li class="navelem"><a class="el" href="inet__chksum_8h.html">inet_chksum.h</a></li> |
| <li class="footer">Generated by <a href="https://www.doxygen.org/index.html"><img class="footer" src="doxygen.svg" width="104" height="31" alt="doxygen"/></a> 1.12.0 </li> |
| </ul> |
| </div> |
| </body> |
| </html> |