<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<title>libnl: lib/attr.c Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<link href="doxygen.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<!-- Generated by Doxygen 1.7.3 -->
<div id="top">
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td style="padding-left: 0.5em;">
<div id="projectname">libnl <span id="projectnumber">1.1</span></div>
</td>
</tr>
</tbody>
</table>
</div>
<div id="navrow1" class="tabs">
<ul class="tablist">
<li><a href="index.html"><span>Main Page</span></a></li>
<li><a href="modules.html"><span>Modules</span></a></li>
<li><a href="annotated.html"><span>Data Structures</span></a></li>
<li class="current"><a href="files.html"><span>Files</span></a></li>
</ul>
</div>
<div id="navrow2" class="tabs2">
<ul class="tablist">
<li><a href="files.html"><span>File List</span></a></li>
</ul>
</div>
<div class="header">
<div class="headertitle">
<h1>lib/attr.c</h1> </div>
</div>
<div class="contents">
<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * lib/attr.c Netlink Attributes</span>
<a name="l00003"></a>00003 <span class="comment"> *</span>
<a name="l00004"></a>00004 <span class="comment"> * This library is free software; you can redistribute it and/or</span>
<a name="l00005"></a>00005 <span class="comment"> * modify it under the terms of the GNU Lesser General Public</span>
<a name="l00006"></a>00006 <span class="comment"> * License as published by the Free Software Foundation version 2.1</span>
<a name="l00007"></a>00007 <span class="comment"> * of the License.</span>
<a name="l00008"></a>00008 <span class="comment"> *</span>
<a name="l00009"></a>00009 <span class="comment"> * Copyright (c) 2003-2006 Thomas Graf <tgraf@suug.ch></span>
<a name="l00010"></a>00010 <span class="comment"> */</span>
<a name="l00011"></a>00011
<a name="l00012"></a>00012 <span class="preprocessor">#include <netlink-local.h></span>
<a name="l00013"></a>00013 <span class="preprocessor">#include <netlink/netlink.h></span>
<a name="l00014"></a>00014 <span class="preprocessor">#include <netlink/utils.h></span>
<a name="l00015"></a>00015 <span class="preprocessor">#include <netlink/addr.h></span>
<a name="l00016"></a>00016 <span class="preprocessor">#include <netlink/attr.h></span>
<a name="l00017"></a>00017 <span class="preprocessor">#include <netlink/msg.h></span>
<a name="l00018"></a>00018 <span class="preprocessor">#include <linux/socket.h></span>
<a name="l00019"></a>00019 <span class="comment"></span>
<a name="l00020"></a>00020 <span class="comment">/**</span>
<a name="l00021"></a>00021 <span class="comment"> * @ingroup msg</span>
<a name="l00022"></a>00022 <span class="comment"> * @defgroup attr Attributes</span>
<a name="l00023"></a>00023 <span class="comment"> * Netlink Attributes Construction/Parsing Interface</span>
<a name="l00024"></a>00024 <span class="comment"> * @par 0) Introduction</span>
<a name="l00025"></a>00025 <span class="comment"> * Netlink attributes are chained together following each other:</span>
<a name="l00026"></a>00026 <span class="comment"> * @code</span>
<a name="l00027"></a>00027 <span class="comment"> * <------- nla_total_size(payload) -------></span>
<a name="l00028"></a>00028 <span class="comment"> * <---- nla_attr_size(payload) -----></span>
<a name="l00029"></a>00029 <span class="comment"> * +----------+- - -+- - - - - - - - - +- - -+-------- - -</span>
<a name="l00030"></a>00030 <span class="comment"> * | Header | Pad | Payload | Pad | Header</span>
<a name="l00031"></a>00031 <span class="comment"> * +----------+- - -+- - - - - - - - - +- - -+-------- - -</span>
<a name="l00032"></a>00032 <span class="comment"> * <- nla_len(nla) -> ^</span>
<a name="l00033"></a>00033 <span class="comment"> * nla_data(nla)----^ |</span>
<a name="l00034"></a>00034 <span class="comment"> * nla_next(nla)-----------------------------'</span>
<a name="l00035"></a>00035 <span class="comment"> * @endcode</span>
<a name="l00036"></a>00036 <span class="comment"> *</span>
<a name="l00037"></a>00037 <span class="comment"> * @par</span>
<a name="l00038"></a>00038 <span class="comment"> * The attribute header and payload must be aligned properly:</span>
<a name="l00039"></a>00039 <span class="comment"> * @code</span>
<a name="l00040"></a>00040 <span class="comment"> * <------- NLA_HDRLEN ------> <-- NLA_ALIGN(payload)--></span>
<a name="l00041"></a>00041 <span class="comment"> * +---------------------+- - -+- - - - - - - - - -+- - -+</span>
<a name="l00042"></a>00042 <span class="comment"> * | Header | Pad | Payload | Pad |</span>
<a name="l00043"></a>00043 <span class="comment"> * | (struct nlattr) | ing | | ing |</span>
<a name="l00044"></a>00044 <span class="comment"> * +---------------------+- - -+- - - - - - - - - -+- - -+</span>
<a name="l00045"></a>00045 <span class="comment"> * <-------------- nlattr->nla_len --------------></span>
<a name="l00046"></a>00046 <span class="comment"> * @endcode</span>
<a name="l00047"></a>00047 <span class="comment"> *</span>
<a name="l00048"></a>00048 <span class="comment"> * @par Nested TLVs:</span>
<a name="l00049"></a>00049 <span class="comment"> * Nested TLVs are an array of TLVs nested into another TLV. This can be useful</span>
<a name="l00050"></a>00050 <span class="comment"> * to allow subsystems to have their own formatting rules without the need to</span>
<a name="l00051"></a>00051 <span class="comment"> * make the underlying layer be aware of it. It can also be useful to transfer</span>
<a name="l00052"></a>00052 <span class="comment"> * arrays, lists and flattened trees.</span>
<a name="l00053"></a>00053 <span class="comment"> * \code</span>
<a name="l00054"></a>00054 <span class="comment"> * <-------------------- NLA_ALIGN(...) -------------------></span>
<a name="l00055"></a>00055 <span class="comment"> * +---------------+- - - - - - - - - - - - - - - - - -+- - -+</span>
<a name="l00056"></a>00056 <span class="comment"> * | |+---------+---------+- - -+-------+| |</span>
<a name="l00057"></a>00057 <span class="comment"> * | TLV Header || TLV 1 | TLV 2 | | TLV n || Pad |</span>
<a name="l00058"></a>00058 <span class="comment"> * | |+---------+---------+- - -+-------+| |</span>
<a name="l00059"></a>00059 <span class="comment"> * +---------------+- - - - - - - - - - - - - - - - - -+- - -+</span>
<a name="l00060"></a>00060 <span class="comment"> * <--------- nla_data(nla) ---------></span>
<a name="l00061"></a>00061 <span class="comment"> * \endcode</span>
<a name="l00062"></a>00062 <span class="comment"> *</span>
<a name="l00063"></a>00063 <span class="comment"> * @par 1) Constructing a message with attributes</span>
<a name="l00064"></a>00064 <span class="comment"> * @code</span>
<a name="l00065"></a>00065 <span class="comment"> * int param1 = 10;</span>
<a name="l00066"></a>00066 <span class="comment"> * char *param2 = "parameter text";</span>
<a name="l00067"></a>00067 <span class="comment"> *</span>
<a name="l00068"></a>00068 <span class="comment"> * struct nl_msg *msg = nlmsg_alloc();</span>
<a name="l00069"></a>00069 <span class="comment"> * nla_put_u32(msg, 1, param1);</span>
<a name="l00070"></a>00070 <span class="comment"> * nla_put_string(msg, 2, param2);</span>
<a name="l00071"></a>00071 <span class="comment"> * </span>
<a name="l00072"></a>00072 <span class="comment"> * nl_send_auto_complete(handle, nl_msg_get(msg));</span>
<a name="l00073"></a>00073 <span class="comment"> * nlmsg_free(msg);</span>
<a name="l00074"></a>00074 <span class="comment"> * @endcode</span>
<a name="l00075"></a>00075 <span class="comment"> *</span>
<a name="l00076"></a>00076 <span class="comment"> * @par 2) Constructing nested attributes</span>
<a name="l00077"></a>00077 <span class="comment"> * @code</span>
<a name="l00078"></a>00078 <span class="comment"> * struct nl_msg * nested_config(void)</span>
<a name="l00079"></a>00079 <span class="comment"> * {</span>
<a name="l00080"></a>00080 <span class="comment"> * int a = 5, int b = 10;</span>
<a name="l00081"></a>00081 <span class="comment"> * struct nl_msg *n = nlmsg_alloc();</span>
<a name="l00082"></a>00082 <span class="comment"> * nla_put_u32(n, 10, a);</span>
<a name="l00083"></a>00083 <span class="comment"> * nla_put_u32(n, 20, b);</span>
<a name="l00084"></a>00084 <span class="comment"> * return n;</span>
<a name="l00085"></a>00085 <span class="comment"> * }</span>
<a name="l00086"></a>00086 <span class="comment"> *</span>
<a name="l00087"></a>00087 <span class="comment"> * ...</span>
<a name="l00088"></a>00088 <span class="comment"> * struct nl_msg *m = nlmsg_alloc();</span>
<a name="l00089"></a>00089 <span class="comment"> * struct nl_msg *nest = nested_config();</span>
<a name="l00090"></a>00090 <span class="comment"> * nla_put_nested(m, 1, nest);</span>
<a name="l00091"></a>00091 <span class="comment"> *</span>
<a name="l00092"></a>00092 <span class="comment"> * nl_send_auto_complete(handle, nl_msg_get(m));</span>
<a name="l00093"></a>00093 <span class="comment"> * nlmsg_free(nest);</span>
<a name="l00094"></a>00094 <span class="comment"> * nlmsg_free(m);</span>
<a name="l00095"></a>00095 <span class="comment"> * @endcode</span>
<a name="l00096"></a>00096 <span class="comment"> * @{</span>
<a name="l00097"></a>00097 <span class="comment"> */</span>
<a name="l00098"></a>00098 <span class="comment"></span>
<a name="l00099"></a>00099 <span class="comment">/**</span>
<a name="l00100"></a>00100 <span class="comment"> * @name Size Calculations</span>
<a name="l00101"></a>00101 <span class="comment"> * @{</span>
<a name="l00102"></a>00102 <span class="comment"> */</span>
<a name="l00103"></a>00103 <span class="comment"></span>
<a name="l00104"></a>00104 <span class="comment">/**</span>
<a name="l00105"></a>00105 <span class="comment"> * length of attribute not including padding</span>
<a name="l00106"></a>00106 <span class="comment"> * @arg payload length of payload</span>
<a name="l00107"></a>00107 <span class="comment"> */</span>
<a name="l00108"></a><a class="code" href="group__attr.html#ga894e1ded50d0d62748a2b9b5f7195938">00108</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#ga894e1ded50d0d62748a2b9b5f7195938" title="length of attribute not including padding">nla_attr_size</a>(<span class="keywordtype">int</span> payload)
<a name="l00109"></a>00109 {
<a name="l00110"></a>00110 <span class="keywordflow">return</span> NLA_HDRLEN + payload;
<a name="l00111"></a>00111 }
<a name="l00112"></a>00112 <span class="comment"></span>
<a name="l00113"></a>00113 <span class="comment">/**</span>
<a name="l00114"></a>00114 <span class="comment"> * total length of attribute including padding</span>
<a name="l00115"></a>00115 <span class="comment"> * @arg payload length of payload</span>
<a name="l00116"></a>00116 <span class="comment"> */</span>
<a name="l00117"></a><a class="code" href="group__attr.html#gafc7e89c7d72952510eff46f96761e3ea">00117</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#gafc7e89c7d72952510eff46f96761e3ea" title="total length of attribute including padding">nla_total_size</a>(<span class="keywordtype">int</span> payload)
<a name="l00118"></a>00118 {
<a name="l00119"></a>00119 <span class="keywordflow">return</span> NLA_ALIGN(<a class="code" href="group__attr.html#ga894e1ded50d0d62748a2b9b5f7195938" title="length of attribute not including padding">nla_attr_size</a>(payload));
<a name="l00120"></a>00120 }
<a name="l00121"></a>00121 <span class="comment"></span>
<a name="l00122"></a>00122 <span class="comment">/**</span>
<a name="l00123"></a>00123 <span class="comment"> * length of padding at the tail of the attribute</span>
<a name="l00124"></a>00124 <span class="comment"> * @arg payload length of payload</span>
<a name="l00125"></a>00125 <span class="comment"> */</span>
<a name="l00126"></a><a class="code" href="group__attr.html#gae24ddf8c4bb186eaaed15ecb2d08b816">00126</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#gae24ddf8c4bb186eaaed15ecb2d08b816" title="length of padding at the tail of the attribute">nla_padlen</a>(<span class="keywordtype">int</span> payload)
<a name="l00127"></a>00127 {
<a name="l00128"></a>00128 <span class="keywordflow">return</span> <a class="code" href="group__attr.html#gafc7e89c7d72952510eff46f96761e3ea" title="total length of attribute including padding">nla_total_size</a>(payload) - <a class="code" href="group__attr.html#ga894e1ded50d0d62748a2b9b5f7195938" title="length of attribute not including padding">nla_attr_size</a>(payload);
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130 <span class="comment"></span>
<a name="l00131"></a>00131 <span class="comment">/** @} */</span>
<a name="l00132"></a>00132 <span class="comment"></span>
<a name="l00133"></a>00133 <span class="comment">/**</span>
<a name="l00134"></a>00134 <span class="comment"> * @name Payload Access</span>
<a name="l00135"></a>00135 <span class="comment"> * @{</span>
<a name="l00136"></a>00136 <span class="comment"> */</span>
<a name="l00137"></a>00137 <span class="comment"></span>
<a name="l00138"></a>00138 <span class="comment">/**</span>
<a name="l00139"></a>00139 <span class="comment"> * attribute type</span>
<a name="l00140"></a>00140 <span class="comment"> * @arg nla netlink attribute</span>
<a name="l00141"></a>00141 <span class="comment"> */</span>
<a name="l00142"></a><a class="code" href="group__attr.html#ga4aa5611a0b84b217ee9a7dd2b0491128">00142</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#ga4aa5611a0b84b217ee9a7dd2b0491128" title="attribute type">nla_type</a>(<span class="keyword">const</span> <span class="keyword">struct</span> nlattr *nla)
<a name="l00143"></a>00143 {
<a name="l00144"></a>00144 <span class="keywordflow">return</span> nla->nla_type & NLA_TYPE_MASK;
<a name="l00145"></a>00145 }
<a name="l00146"></a>00146 <span class="comment"></span>
<a name="l00147"></a>00147 <span class="comment">/**</span>
<a name="l00148"></a>00148 <span class="comment"> * head of payload</span>
<a name="l00149"></a>00149 <span class="comment"> * @arg nla netlink attribute</span>
<a name="l00150"></a>00150 <span class="comment"> */</span>
<a name="l00151"></a><a class="code" href="group__attr.html#gaf39d6bbd2be1fc2de30b6b7d079a5fce">00151</a> <span class="keywordtype">void</span> *<a class="code" href="group__attr.html#gaf39d6bbd2be1fc2de30b6b7d079a5fce" title="head of payload">nla_data</a>(<span class="keyword">const</span> <span class="keyword">struct</span> nlattr *nla)
<a name="l00152"></a>00152 {
<a name="l00153"></a>00153 <span class="keywordflow">return</span> (<span class="keywordtype">char</span> *) nla + NLA_HDRLEN;
<a name="l00154"></a>00154 }
<a name="l00155"></a>00155 <span class="comment"></span>
<a name="l00156"></a>00156 <span class="comment">/**</span>
<a name="l00157"></a>00157 <span class="comment"> * length of payload</span>
<a name="l00158"></a>00158 <span class="comment"> * @arg nla netlink attribute</span>
<a name="l00159"></a>00159 <span class="comment"> */</span>
<a name="l00160"></a><a class="code" href="group__attr.html#gac5a7705797946fa9c0775997bb8d130b">00160</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#gac5a7705797946fa9c0775997bb8d130b" title="length of payload">nla_len</a>(<span class="keyword">const</span> <span class="keyword">struct</span> nlattr *nla)
<a name="l00161"></a>00161 {
<a name="l00162"></a>00162 <span class="keywordflow">return</span> nla->nla_len - NLA_HDRLEN;
<a name="l00163"></a>00163 }
<a name="l00164"></a>00164 <span class="comment"></span>
<a name="l00165"></a>00165 <span class="comment">/** @} */</span>
<a name="l00166"></a>00166 <span class="comment"></span>
<a name="l00167"></a>00167 <span class="comment">/**</span>
<a name="l00168"></a>00168 <span class="comment"> * @name Attribute Parsing</span>
<a name="l00169"></a>00169 <span class="comment"> * @{</span>
<a name="l00170"></a>00170 <span class="comment"> */</span>
<a name="l00171"></a>00171 <span class="comment"></span>
<a name="l00172"></a>00172 <span class="comment">/**</span>
<a name="l00173"></a>00173 <span class="comment"> * check if the netlink attribute fits into the remaining bytes</span>
<a name="l00174"></a>00174 <span class="comment"> * @arg nla netlink attribute</span>
<a name="l00175"></a>00175 <span class="comment"> * @arg remaining number of bytes remaining in attribute stream</span>
<a name="l00176"></a>00176 <span class="comment"> */</span>
<a name="l00177"></a><a class="code" href="group__attr.html#ga5e4378d7681e9477e8e364542187d07a">00177</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#ga5e4378d7681e9477e8e364542187d07a" title="check if the netlink attribute fits into the remaining bytes">nla_ok</a>(<span class="keyword">const</span> <span class="keyword">struct</span> nlattr *nla, <span class="keywordtype">int</span> remaining)
<a name="l00178"></a>00178 {
<a name="l00179"></a>00179 <span class="keywordflow">return</span> remaining >= <span class="keyword">sizeof</span>(*nla) &&
<a name="l00180"></a>00180 nla->nla_len >= <span class="keyword">sizeof</span>(*nla) &&
<a name="l00181"></a>00181 nla->nla_len <= remaining;
<a name="l00182"></a>00182 }
<a name="l00183"></a>00183 <span class="comment"></span>
<a name="l00184"></a>00184 <span class="comment">/**</span>
<a name="l00185"></a>00185 <span class="comment"> * next netlink attribte in attribute stream</span>
<a name="l00186"></a>00186 <span class="comment"> * @arg nla netlink attribute</span>
<a name="l00187"></a>00187 <span class="comment"> * @arg remaining number of bytes remaining in attribute stream</span>
<a name="l00188"></a>00188 <span class="comment"> *</span>
<a name="l00189"></a>00189 <span class="comment"> * @return the next netlink attribute in the attribute stream and</span>
<a name="l00190"></a>00190 <span class="comment"> * decrements remaining by the size of the current attribute.</span>
<a name="l00191"></a>00191 <span class="comment"> */</span>
<a name="l00192"></a><a class="code" href="group__attr.html#ga68b6fbaa58b11804df8af489b79fbab7">00192</a> <span class="keyword">struct </span>nlattr *<a class="code" href="group__attr.html#ga68b6fbaa58b11804df8af489b79fbab7" title="next netlink attribte in attribute stream">nla_next</a>(<span class="keyword">const</span> <span class="keyword">struct</span> nlattr *nla, <span class="keywordtype">int</span> *remaining)
<a name="l00193"></a>00193 {
<a name="l00194"></a>00194 <span class="keywordtype">int</span> totlen = NLA_ALIGN(nla->nla_len);
<a name="l00195"></a>00195
<a name="l00196"></a>00196 *remaining -= totlen;
<a name="l00197"></a>00197 <span class="keywordflow">return</span> (<span class="keyword">struct</span> nlattr *) ((<span class="keywordtype">char</span> *) nla + totlen);
<a name="l00198"></a>00198 }
<a name="l00199"></a>00199
<a name="l00200"></a>00200 <span class="keyword">static</span> uint16_t nla_attr_minlen[<a class="code" href="group__attr.html#ga5d5983c9eeaf9fb343fc1463bd7c5e4c" title="Maximum netlink validation policy type.">NLA_TYPE_MAX</a>+1] = {
<a name="l00201"></a>00201 [<a class="code" href="group__attr.html#gga06fc87d81c62e9abb8790b6e5713c55ba5e9fb615f67cd1b0232f82f978d76b39" title="8bit integer">NLA_U8</a>] = <span class="keyword">sizeof</span>(uint8_t),
<a name="l00202"></a>00202 [<a class="code" href="group__attr.html#gga06fc87d81c62e9abb8790b6e5713c55ba8ca718be156e8f388cbcbc4c3d1d874d" title="16bit integer">NLA_U16</a>] = <span class="keyword">sizeof</span>(uint16_t),
<a name="l00203"></a>00203 [<a class="code" href="group__attr.html#gga06fc87d81c62e9abb8790b6e5713c55babddb836025b456b06b025c293bff6dc8" title="32bit integer">NLA_U32</a>] = <span class="keyword">sizeof</span>(uint32_t),
<a name="l00204"></a>00204 [<a class="code" href="group__attr.html#gga06fc87d81c62e9abb8790b6e5713c55ba210e5e3c0d9281fbe9481092ba2ef201" title="64bit integer">NLA_U64</a>] = <span class="keyword">sizeof</span>(uint64_t),
<a name="l00205"></a>00205 [<a class="code" href="group__attr.html#gga06fc87d81c62e9abb8790b6e5713c55ba284d1eafd6d5d99cedaff3cd5f5a8378" title="character string">NLA_STRING</a>] = 1,
<a name="l00206"></a>00206 [<a class="code" href="group__attr.html#gga06fc87d81c62e9abb8790b6e5713c55ba925c06a260a9ffaef80ee4aa13738e19" title="nested attributes">NLA_NESTED</a>] = NLA_HDRLEN,
<a name="l00207"></a>00207 };
<a name="l00208"></a>00208
<a name="l00209"></a>00209 <span class="keyword">static</span> <span class="keywordtype">int</span> validate_nla(<span class="keyword">struct</span> nlattr *nla, <span class="keywordtype">int</span> maxtype,
<a name="l00210"></a>00210 <span class="keyword">struct</span> <a class="code" href="structnla__policy.html" title="attribute validation policy">nla_policy</a> *policy)
<a name="l00211"></a>00211 {
<a name="l00212"></a>00212 <span class="keyword">struct </span><a class="code" href="structnla__policy.html" title="attribute validation policy">nla_policy</a> *pt;
<a name="l00213"></a>00213 <span class="keywordtype">int</span> <a class="code" href="structnla__policy.html#a70310d3332cb82c390754bd70b1cb7dd" title="Minimal length of payload required to be available.">minlen</a> = 0, <a class="code" href="structnla__policy.html#aaa36c9d1e298fc9e4ee16a8fb553b32a" title="Type of attribute or NLA_UNSPEC.">type</a> = <a class="code" href="group__attr.html#ga4aa5611a0b84b217ee9a7dd2b0491128" title="attribute type">nla_type</a>(nla);
<a name="l00214"></a>00214
<a name="l00215"></a>00215 <span class="keywordflow">if</span> (type <= 0 || type > maxtype)
<a name="l00216"></a>00216 <span class="keywordflow">return</span> 0;
<a name="l00217"></a>00217
<a name="l00218"></a>00218 pt = &policy[<a class="code" href="structnla__policy.html#aaa36c9d1e298fc9e4ee16a8fb553b32a" title="Type of attribute or NLA_UNSPEC.">type</a>];
<a name="l00219"></a>00219
<a name="l00220"></a>00220 <span class="keywordflow">if</span> (pt-><a class="code" href="structnla__policy.html#aaa36c9d1e298fc9e4ee16a8fb553b32a" title="Type of attribute or NLA_UNSPEC.">type</a> > <a class="code" href="group__attr.html#ga5d5983c9eeaf9fb343fc1463bd7c5e4c" title="Maximum netlink validation policy type.">NLA_TYPE_MAX</a>)
<a name="l00221"></a>00221 BUG();
<a name="l00222"></a>00222
<a name="l00223"></a>00223 <span class="keywordflow">if</span> (pt-><a class="code" href="structnla__policy.html#a70310d3332cb82c390754bd70b1cb7dd" title="Minimal length of payload required to be available.">minlen</a>)
<a name="l00224"></a>00224 minlen = pt-><a class="code" href="structnla__policy.html#a70310d3332cb82c390754bd70b1cb7dd" title="Minimal length of payload required to be available.">minlen</a>;
<a name="l00225"></a>00225 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (pt-><a class="code" href="structnla__policy.html#aaa36c9d1e298fc9e4ee16a8fb553b32a" title="Type of attribute or NLA_UNSPEC.">type</a> != <a class="code" href="group__attr.html#gga06fc87d81c62e9abb8790b6e5713c55ba3050acbc4faecec82dff1038c7e65d21" title="Unspecified type.">NLA_UNSPEC</a>)
<a name="l00226"></a>00226 minlen = nla_attr_minlen[pt-><a class="code" href="structnla__policy.html#aaa36c9d1e298fc9e4ee16a8fb553b32a" title="Type of attribute or NLA_UNSPEC.">type</a>];
<a name="l00227"></a>00227
<a name="l00228"></a>00228 <span class="keywordflow">if</span> (pt-><a class="code" href="structnla__policy.html#aaa36c9d1e298fc9e4ee16a8fb553b32a" title="Type of attribute or NLA_UNSPEC.">type</a> == <a class="code" href="group__attr.html#gga06fc87d81c62e9abb8790b6e5713c55ba8ad0bfef5a11304edf6a95971647ae0e" title="flag">NLA_FLAG</a> && <a class="code" href="group__attr.html#gac5a7705797946fa9c0775997bb8d130b" title="length of payload">nla_len</a>(nla) > 0)
<a name="l00229"></a>00229 <span class="keywordflow">return</span> nl_errno(ERANGE);
<a name="l00230"></a>00230
<a name="l00231"></a>00231 <span class="keywordflow">if</span> (<a class="code" href="group__attr.html#gac5a7705797946fa9c0775997bb8d130b" title="length of payload">nla_len</a>(nla) < minlen)
<a name="l00232"></a>00232 <span class="keywordflow">return</span> nl_errno(ERANGE);
<a name="l00233"></a>00233
<a name="l00234"></a>00234 <span class="keywordflow">if</span> (pt-><a class="code" href="structnla__policy.html#a408814d16c0dbeb4137e76b36776583d" title="Maximal length of payload required to be available.">maxlen</a> && <a class="code" href="group__attr.html#gac5a7705797946fa9c0775997bb8d130b" title="length of payload">nla_len</a>(nla) > pt-><a class="code" href="structnla__policy.html#a408814d16c0dbeb4137e76b36776583d" title="Maximal length of payload required to be available.">maxlen</a>)
<a name="l00235"></a>00235 <span class="keywordflow">return</span> nl_errno(ERANGE);
<a name="l00236"></a>00236
<a name="l00237"></a>00237 <span class="keywordflow">if</span> (pt-><a class="code" href="structnla__policy.html#aaa36c9d1e298fc9e4ee16a8fb553b32a" title="Type of attribute or NLA_UNSPEC.">type</a> == <a class="code" href="group__attr.html#gga06fc87d81c62e9abb8790b6e5713c55ba284d1eafd6d5d99cedaff3cd5f5a8378" title="character string">NLA_STRING</a>) {
<a name="l00238"></a>00238 <span class="keywordtype">char</span> *data = <a class="code" href="group__attr.html#gaf39d6bbd2be1fc2de30b6b7d079a5fce" title="head of payload">nla_data</a>(nla);
<a name="l00239"></a>00239 <span class="keywordflow">if</span> (data[<a class="code" href="group__attr.html#gac5a7705797946fa9c0775997bb8d130b" title="length of payload">nla_len</a>(nla) - 1] != <span class="charliteral">'\0'</span>)
<a name="l00240"></a>00240 <span class="keywordflow">return</span> nl_errno(EINVAL);
<a name="l00241"></a>00241 }
<a name="l00242"></a>00242
<a name="l00243"></a>00243 <span class="keywordflow">return</span> 0;
<a name="l00244"></a>00244 }
<a name="l00245"></a>00245
<a name="l00246"></a>00246 <span class="comment"></span>
<a name="l00247"></a>00247 <span class="comment">/**</span>
<a name="l00248"></a>00248 <span class="comment"> * Parse a stream of attributes into a tb buffer</span>
<a name="l00249"></a>00249 <span class="comment"> * @arg tb destination array with maxtype+1 elements</span>
<a name="l00250"></a>00250 <span class="comment"> * @arg maxtype maximum attribute type to be expected</span>
<a name="l00251"></a>00251 <span class="comment"> * @arg head head of attribute stream</span>
<a name="l00252"></a>00252 <span class="comment"> * @arg len length of attribute stream</span>
<a name="l00253"></a>00253 <span class="comment"> * @arg policy validation policy</span>
<a name="l00254"></a>00254 <span class="comment"> *</span>
<a name="l00255"></a>00255 <span class="comment"> * Parses a stream of attributes and stores a pointer to each attribute in</span>
<a name="l00256"></a>00256 <span class="comment"> * the tb array accessable via the attribute type. Attributes with a type</span>
<a name="l00257"></a>00257 <span class="comment"> * exceeding maxtype will be silently ignored for backwards compatibility</span>
<a name="l00258"></a>00258 <span class="comment"> * reasons. policy may be set to NULL if no validation is required.</span>
<a name="l00259"></a>00259 <span class="comment"> *</span>
<a name="l00260"></a>00260 <span class="comment"> * @return 0 on success or a negative error code.</span>
<a name="l00261"></a>00261 <span class="comment"> */</span>
<a name="l00262"></a><a class="code" href="group__attr.html#gaa7ad544b5a93034602a442eb26cda92c">00262</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#gaa7ad544b5a93034602a442eb26cda92c" title="Parse a stream of attributes into a tb buffer.">nla_parse</a>(<span class="keyword">struct</span> nlattr *tb[], <span class="keywordtype">int</span> maxtype, <span class="keyword">struct</span> nlattr *head, <span class="keywordtype">int</span> len,
<a name="l00263"></a>00263 <span class="keyword">struct</span> <a class="code" href="structnla__policy.html" title="attribute validation policy">nla_policy</a> *policy)
<a name="l00264"></a>00264 {
<a name="l00265"></a>00265 <span class="keyword">struct </span>nlattr *nla;
<a name="l00266"></a>00266 <span class="keywordtype">int</span> rem, err;
<a name="l00267"></a>00267
<a name="l00268"></a>00268 memset(tb, 0, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> nlattr *) * (maxtype + 1));
<a name="l00269"></a>00269
<a name="l00270"></a>00270 <a class="code" href="group__attr.html#ga7a262955c3fb8eab3158bd07180fbc2c" title="iterate over a stream of attributes">nla_for_each_attr</a>(nla, head, len, rem) {
<a name="l00271"></a>00271 <span class="keywordtype">int</span> type = <a class="code" href="group__attr.html#ga4aa5611a0b84b217ee9a7dd2b0491128" title="attribute type">nla_type</a>(nla);
<a name="l00272"></a>00272
<a name="l00273"></a>00273 <span class="keywordflow">if</span> (type == 0) {
<a name="l00274"></a>00274 fprintf(stderr, <span class="stringliteral">"Illegal nla->nla_type == 0\n"</span>);
<a name="l00275"></a>00275 <span class="keywordflow">continue</span>;
<a name="l00276"></a>00276 }
<a name="l00277"></a>00277
<a name="l00278"></a>00278 <span class="keywordflow">if</span> (type <= maxtype) {
<a name="l00279"></a>00279 <span class="keywordflow">if</span> (policy) {
<a name="l00280"></a>00280 err = validate_nla(nla, maxtype, policy);
<a name="l00281"></a>00281 <span class="keywordflow">if</span> (err < 0)
<a name="l00282"></a>00282 <span class="keywordflow">goto</span> errout;
<a name="l00283"></a>00283 }
<a name="l00284"></a>00284
<a name="l00285"></a>00285 tb[type] = nla;
<a name="l00286"></a>00286 }
<a name="l00287"></a>00287 }
<a name="l00288"></a>00288
<a name="l00289"></a>00289 <span class="keywordflow">if</span> (rem > 0)
<a name="l00290"></a>00290 fprintf(stderr, <span class="stringliteral">"netlink: %d bytes leftover after parsing "</span>
<a name="l00291"></a>00291 <span class="stringliteral">"attributes.\n"</span>, rem);
<a name="l00292"></a>00292
<a name="l00293"></a>00293 err = 0;
<a name="l00294"></a>00294 errout:
<a name="l00295"></a>00295 <span class="keywordflow">return</span> err;
<a name="l00296"></a>00296 }
<a name="l00297"></a>00297
<a name="l00298"></a>00298 <span class="comment"></span>
<a name="l00299"></a>00299 <span class="comment">/**</span>
<a name="l00300"></a>00300 <span class="comment"> * parse nested attributes</span>
<a name="l00301"></a>00301 <span class="comment"> * @arg tb destination array with maxtype+1 elements</span>
<a name="l00302"></a>00302 <span class="comment"> * @arg maxtype maximum attribute type to be expected</span>
<a name="l00303"></a>00303 <span class="comment"> * @arg nla attribute containing the nested attributes</span>
<a name="l00304"></a>00304 <span class="comment"> * @arg policy validation policy</span>
<a name="l00305"></a>00305 <span class="comment"> *</span>
<a name="l00306"></a>00306 <span class="comment"> * @see nla_parse()</span>
<a name="l00307"></a>00307 <span class="comment"> */</span>
<a name="l00308"></a><a class="code" href="group__attr.html#ga974ec0720b2d863a5c65da868bcb7a6e">00308</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#ga974ec0720b2d863a5c65da868bcb7a6e" title="parse nested attributes">nla_parse_nested</a>(<span class="keyword">struct</span> nlattr *tb[], <span class="keywordtype">int</span> maxtype, <span class="keyword">struct</span> nlattr *nla,
<a name="l00309"></a>00309 <span class="keyword">struct</span> <a class="code" href="structnla__policy.html" title="attribute validation policy">nla_policy</a> *policy)
<a name="l00310"></a>00310 {
<a name="l00311"></a>00311 <span class="keywordflow">return</span> <a class="code" href="group__attr.html#gaa7ad544b5a93034602a442eb26cda92c" title="Parse a stream of attributes into a tb buffer.">nla_parse</a>(tb, maxtype, <a class="code" href="group__attr.html#gaf39d6bbd2be1fc2de30b6b7d079a5fce" title="head of payload">nla_data</a>(nla), <a class="code" href="group__attr.html#gac5a7705797946fa9c0775997bb8d130b" title="length of payload">nla_len</a>(nla), policy);
<a name="l00312"></a>00312 }
<a name="l00313"></a>00313 <span class="comment"></span>
<a name="l00314"></a>00314 <span class="comment">/**</span>
<a name="l00315"></a>00315 <span class="comment"> * Validate a stream of attributes</span>
<a name="l00316"></a>00316 <span class="comment"> * @arg head head of attribute stream</span>
<a name="l00317"></a>00317 <span class="comment"> * @arg len length of attribute stream</span>
<a name="l00318"></a>00318 <span class="comment"> * @arg maxtype maximum attribute type to be expected</span>
<a name="l00319"></a>00319 <span class="comment"> * @arg policy validation policy</span>
<a name="l00320"></a>00320 <span class="comment"> *</span>
<a name="l00321"></a>00321 <span class="comment"> * Validates all attributes in the specified attribute stream</span>
<a name="l00322"></a>00322 <span class="comment"> * against the specified policy. Attributes with a type exceeding</span>
<a name="l00323"></a>00323 <span class="comment"> * maxtype will be ignored. See documenation of struct nla_policy</span>
<a name="l00324"></a>00324 <span class="comment"> * for more details.</span>
<a name="l00325"></a>00325 <span class="comment"> *</span>
<a name="l00326"></a>00326 <span class="comment"> * @return 0 on success or a negative error code.</span>
<a name="l00327"></a>00327 <span class="comment"> */</span>
<a name="l00328"></a><a class="code" href="group__attr.html#ga5d8d5930b012e61c8d8e4ba6b3038c36">00328</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#ga5d8d5930b012e61c8d8e4ba6b3038c36" title="Validate a stream of attributes.">nla_validate</a>(<span class="keyword">struct</span> nlattr *head, <span class="keywordtype">int</span> len, <span class="keywordtype">int</span> maxtype,
<a name="l00329"></a>00329 <span class="keyword">struct</span> <a class="code" href="structnla__policy.html" title="attribute validation policy">nla_policy</a> *policy)
<a name="l00330"></a>00330 {
<a name="l00331"></a>00331 <span class="keyword">struct </span>nlattr *nla;
<a name="l00332"></a>00332 <span class="keywordtype">int</span> rem, err;
<a name="l00333"></a>00333
<a name="l00334"></a>00334 <a class="code" href="group__attr.html#ga7a262955c3fb8eab3158bd07180fbc2c" title="iterate over a stream of attributes">nla_for_each_attr</a>(nla, head, len, rem) {
<a name="l00335"></a>00335 err = validate_nla(nla, maxtype, policy);
<a name="l00336"></a>00336 <span class="keywordflow">if</span> (err < 0)
<a name="l00337"></a>00337 <span class="keywordflow">goto</span> errout;
<a name="l00338"></a>00338 }
<a name="l00339"></a>00339
<a name="l00340"></a>00340 err = 0;
<a name="l00341"></a>00341 errout:
<a name="l00342"></a>00342 <span class="keywordflow">return</span> err;
<a name="l00343"></a>00343 }
<a name="l00344"></a>00344 <span class="comment"></span>
<a name="l00345"></a>00345 <span class="comment">/**</span>
<a name="l00346"></a>00346 <span class="comment"> * Find a specific attribute in a stream of attributes</span>
<a name="l00347"></a>00347 <span class="comment"> * @arg head head of attribute stream</span>
<a name="l00348"></a>00348 <span class="comment"> * @arg len length of attribute stream</span>
<a name="l00349"></a>00349 <span class="comment"> * @arg attrtype type of attribute to look for</span>
<a name="l00350"></a>00350 <span class="comment"> *</span>
<a name="l00351"></a>00351 <span class="comment"> * @return the first attribute in the stream matching the specified type.</span>
<a name="l00352"></a>00352 <span class="comment"> */</span>
<a name="l00353"></a><a class="code" href="group__attr.html#ga2e98df8c30030aebcfd1eebf11bbb22a">00353</a> <span class="keyword">struct </span>nlattr *<a class="code" href="group__attr.html#ga2e98df8c30030aebcfd1eebf11bbb22a" title="Find a specific attribute in a stream of attributes.">nla_find</a>(<span class="keyword">struct</span> nlattr *head, <span class="keywordtype">int</span> len, <span class="keywordtype">int</span> attrtype)
<a name="l00354"></a>00354 {
<a name="l00355"></a>00355 <span class="keyword">struct </span>nlattr *nla;
<a name="l00356"></a>00356 <span class="keywordtype">int</span> rem;
<a name="l00357"></a>00357
<a name="l00358"></a>00358 <a class="code" href="group__attr.html#ga7a262955c3fb8eab3158bd07180fbc2c" title="iterate over a stream of attributes">nla_for_each_attr</a>(nla, head, len, rem)
<a name="l00359"></a>00359 <span class="keywordflow">if</span> (<a class="code" href="group__attr.html#ga4aa5611a0b84b217ee9a7dd2b0491128" title="attribute type">nla_type</a>(nla) == attrtype)
<a name="l00360"></a>00360 <span class="keywordflow">return</span> nla;
<a name="l00361"></a>00361
<a name="l00362"></a>00362 <span class="keywordflow">return</span> NULL;
<a name="l00363"></a>00363 }
<a name="l00364"></a>00364 <span class="comment"></span>
<a name="l00365"></a>00365 <span class="comment">/** @} */</span>
<a name="l00366"></a>00366 <span class="comment"></span>
<a name="l00367"></a>00367 <span class="comment">/**</span>
<a name="l00368"></a>00368 <span class="comment"> * @name Utilities</span>
<a name="l00369"></a>00369 <span class="comment"> * @{</span>
<a name="l00370"></a>00370 <span class="comment"> */</span>
<a name="l00371"></a>00371 <span class="comment"></span>
<a name="l00372"></a>00372 <span class="comment">/**</span>
<a name="l00373"></a>00373 <span class="comment"> * Copy a netlink attribute into another memory area</span>
<a name="l00374"></a>00374 <span class="comment"> * @arg dest where to copy to memcpy</span>
<a name="l00375"></a>00375 <span class="comment"> * @arg src netlink attribute to copy from</span>
<a name="l00376"></a>00376 <span class="comment"> * @arg count size of the destination area</span>
<a name="l00377"></a>00377 <span class="comment"> *</span>
<a name="l00378"></a>00378 <span class="comment"> * Note: The number of bytes copied is limited by the length of</span>
<a name="l00379"></a>00379 <span class="comment"> * attribute's payload. memcpy</span>
<a name="l00380"></a>00380 <span class="comment"> *</span>
<a name="l00381"></a>00381 <span class="comment"> * @return the number of bytes copied.</span>
<a name="l00382"></a>00382 <span class="comment"> */</span>
<a name="l00383"></a><a class="code" href="group__attr.html#gaf2cdaf473a1054b9c3fc735ca7275403">00383</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#gaf2cdaf473a1054b9c3fc735ca7275403" title="Copy a netlink attribute into another memory area.">nla_memcpy</a>(<span class="keywordtype">void</span> *dest, <span class="keyword">struct</span> nlattr *src, <span class="keywordtype">int</span> count)
<a name="l00384"></a>00384 {
<a name="l00385"></a>00385 <span class="keywordtype">int</span> minlen;
<a name="l00386"></a>00386
<a name="l00387"></a>00387 <span class="keywordflow">if</span> (!src)
<a name="l00388"></a>00388 <span class="keywordflow">return</span> 0;
<a name="l00389"></a>00389
<a name="l00390"></a>00390 minlen = min_t(<span class="keywordtype">int</span>, count, <a class="code" href="group__attr.html#gac5a7705797946fa9c0775997bb8d130b" title="length of payload">nla_len</a>(src));
<a name="l00391"></a>00391 memcpy(dest, <a class="code" href="group__attr.html#gaf39d6bbd2be1fc2de30b6b7d079a5fce" title="head of payload">nla_data</a>(src), minlen);
<a name="l00392"></a>00392
<a name="l00393"></a>00393 <span class="keywordflow">return</span> minlen;
<a name="l00394"></a>00394 }
<a name="l00395"></a>00395 <span class="comment"></span>
<a name="l00396"></a>00396 <span class="comment">/**</span>
<a name="l00397"></a>00397 <span class="comment"> * Copy string attribute payload into a sized buffer</span>
<a name="l00398"></a>00398 <span class="comment"> * @arg dst where to copy the string to</span>
<a name="l00399"></a>00399 <span class="comment"> * @arg nla attribute to copy the string from</span>
<a name="l00400"></a>00400 <span class="comment"> * @arg dstsize size of destination buffer</span>
<a name="l00401"></a>00401 <span class="comment"> *</span>
<a name="l00402"></a>00402 <span class="comment"> * Copies at most dstsize - 1 bytes into the destination buffer.</span>
<a name="l00403"></a>00403 <span class="comment"> * The result is always a valid NUL-terminated string. Unlike</span>
<a name="l00404"></a>00404 <span class="comment"> * strlcpy the destination buffer is always padded out.</span>
<a name="l00405"></a>00405 <span class="comment"> *</span>
<a name="l00406"></a>00406 <span class="comment"> * @return the length of the source buffer.</span>
<a name="l00407"></a>00407 <span class="comment"> */</span>
<a name="l00408"></a><a class="code" href="group__attr.html#gaabddc8018334423d84088d241b4b7830">00408</a> <span class="keywordtype">size_t</span> <a class="code" href="group__attr.html#gaabddc8018334423d84088d241b4b7830" title="Copy string attribute payload into a sized buffer.">nla_strlcpy</a>(<span class="keywordtype">char</span> *dst, <span class="keyword">const</span> <span class="keyword">struct</span> nlattr *nla, <span class="keywordtype">size_t</span> dstsize)
<a name="l00409"></a>00409 {
<a name="l00410"></a>00410 <span class="keywordtype">size_t</span> srclen = <a class="code" href="group__attr.html#gac5a7705797946fa9c0775997bb8d130b" title="length of payload">nla_len</a>(nla);
<a name="l00411"></a>00411 <span class="keywordtype">char</span> *src = <a class="code" href="group__attr.html#gaf39d6bbd2be1fc2de30b6b7d079a5fce" title="head of payload">nla_data</a>(nla);
<a name="l00412"></a>00412
<a name="l00413"></a>00413 <span class="keywordflow">if</span> (srclen > 0 && src[srclen - 1] == <span class="charliteral">'\0'</span>)
<a name="l00414"></a>00414 srclen--;
<a name="l00415"></a>00415
<a name="l00416"></a>00416 <span class="keywordflow">if</span> (dstsize > 0) {
<a name="l00417"></a>00417 <span class="keywordtype">size_t</span> len = (srclen >= dstsize) ? dstsize - 1 : srclen;
<a name="l00418"></a>00418
<a name="l00419"></a>00419 memset(dst, 0, dstsize);
<a name="l00420"></a>00420 memcpy(dst, src, len);
<a name="l00421"></a>00421 }
<a name="l00422"></a>00422
<a name="l00423"></a>00423 <span class="keywordflow">return</span> srclen;
<a name="l00424"></a>00424 }
<a name="l00425"></a>00425 <span class="comment"></span>
<a name="l00426"></a>00426 <span class="comment">/**</span>
<a name="l00427"></a>00427 <span class="comment"> * Compare an attribute with sized memory area</span>
<a name="l00428"></a>00428 <span class="comment"> * @arg nla netlink attribute</span>
<a name="l00429"></a>00429 <span class="comment"> * @arg data memory area</span>
<a name="l00430"></a>00430 <span class="comment"> * @arg size size of memory area</span>
<a name="l00431"></a>00431 <span class="comment"> */</span>
<a name="l00432"></a><a class="code" href="group__attr.html#ga737c469f4692bce4c3b18f364e4a1949">00432</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#ga737c469f4692bce4c3b18f364e4a1949" title="Compare an attribute with sized memory area.">nla_memcmp</a>(<span class="keyword">const</span> <span class="keyword">struct</span> nlattr *nla, <span class="keyword">const</span> <span class="keywordtype">void</span> *data,
<a name="l00433"></a>00433 <span class="keywordtype">size_t</span> size)
<a name="l00434"></a>00434 {
<a name="l00435"></a>00435 <span class="keywordtype">int</span> d = <a class="code" href="group__attr.html#gac5a7705797946fa9c0775997bb8d130b" title="length of payload">nla_len</a>(nla) - size;
<a name="l00436"></a>00436
<a name="l00437"></a>00437 <span class="keywordflow">if</span> (d == 0)
<a name="l00438"></a>00438 d = memcmp(<a class="code" href="group__attr.html#gaf39d6bbd2be1fc2de30b6b7d079a5fce" title="head of payload">nla_data</a>(nla), data, size);
<a name="l00439"></a>00439
<a name="l00440"></a>00440 <span class="keywordflow">return</span> d;
<a name="l00441"></a>00441 }
<a name="l00442"></a>00442 <span class="comment"></span>
<a name="l00443"></a>00443 <span class="comment">/**</span>
<a name="l00444"></a>00444 <span class="comment"> * Compare a string attribute against a string</span>
<a name="l00445"></a>00445 <span class="comment"> * @arg nla netlink string attribute</span>
<a name="l00446"></a>00446 <span class="comment"> * @arg str another string</span>
<a name="l00447"></a>00447 <span class="comment"> */</span>
<a name="l00448"></a><a class="code" href="group__attr.html#ga236748b15cfbc86dde1500ea2bc65072">00448</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#ga236748b15cfbc86dde1500ea2bc65072" title="Compare a string attribute against a string.">nla_strcmp</a>(<span class="keyword">const</span> <span class="keyword">struct</span> nlattr *nla, <span class="keyword">const</span> <span class="keywordtype">char</span> *str)
<a name="l00449"></a>00449 {
<a name="l00450"></a>00450 <span class="keywordtype">int</span> len = strlen(str) + 1;
<a name="l00451"></a>00451 <span class="keywordtype">int</span> d = <a class="code" href="group__attr.html#gac5a7705797946fa9c0775997bb8d130b" title="length of payload">nla_len</a>(nla) - len;
<a name="l00452"></a>00452
<a name="l00453"></a>00453 <span class="keywordflow">if</span> (d == 0)
<a name="l00454"></a>00454 d = memcmp(<a class="code" href="group__attr.html#gaf39d6bbd2be1fc2de30b6b7d079a5fce" title="head of payload">nla_data</a>(nla), str, len);
<a name="l00455"></a>00455
<a name="l00456"></a>00456 <span class="keywordflow">return</span> d;
<a name="l00457"></a>00457 }
<a name="l00458"></a>00458 <span class="comment"></span>
<a name="l00459"></a>00459 <span class="comment">/** @} */</span>
<a name="l00460"></a>00460 <span class="comment"></span>
<a name="l00461"></a>00461 <span class="comment">/**</span>
<a name="l00462"></a>00462 <span class="comment"> * @name Attribute Construction</span>
<a name="l00463"></a>00463 <span class="comment"> * @{</span>
<a name="l00464"></a>00464 <span class="comment"> */</span>
<a name="l00465"></a>00465 <span class="comment"></span>
<a name="l00466"></a>00466 <span class="comment">/**</span>
<a name="l00467"></a>00467 <span class="comment"> * reserve room for attribute on the skb</span>
<a name="l00468"></a>00468 <span class="comment"> * @arg n netlink message</span>
<a name="l00469"></a>00469 <span class="comment"> * @arg attrtype attribute type</span>
<a name="l00470"></a>00470 <span class="comment"> * @arg attrlen length of attribute payload</span>
<a name="l00471"></a>00471 <span class="comment"> *</span>
<a name="l00472"></a>00472 <span class="comment"> * Adds a netlink attribute header to a netlink message and reserves</span>
<a name="l00473"></a>00473 <span class="comment"> * room for the payload but does not copy it.</span>
<a name="l00474"></a>00474 <span class="comment"> */</span>
<a name="l00475"></a><a class="code" href="group__attr.html#gab738cbc916a17baca88aeed2e67dddc2">00475</a> <span class="keyword">struct </span>nlattr *<a class="code" href="group__attr.html#gab738cbc916a17baca88aeed2e67dddc2" title="reserve room for attribute on the skb">nla_reserve</a>(<span class="keyword">struct</span> nl_msg *n, <span class="keywordtype">int</span> attrtype, <span class="keywordtype">int</span> attrlen)
<a name="l00476"></a>00476 {
<a name="l00477"></a>00477 <span class="keyword">struct </span>nlattr *nla;
<a name="l00478"></a>00478 <span class="keywordtype">int</span> tlen;
<a name="l00479"></a>00479
<a name="l00480"></a>00480 tlen = NLMSG_ALIGN(n->nm_nlh->nlmsg_len) + <a class="code" href="group__attr.html#gafc7e89c7d72952510eff46f96761e3ea" title="total length of attribute including padding">nla_total_size</a>(attrlen);
<a name="l00481"></a>00481
<a name="l00482"></a>00482 <span class="keywordflow">if</span> ((tlen + n->nm_nlh->nlmsg_len) > n->nm_size) {
<a name="l00483"></a>00483 nl_errno(ENOBUFS);
<a name="l00484"></a>00484 <span class="keywordflow">return</span> NULL;
<a name="l00485"></a>00485 }
<a name="l00486"></a>00486
<a name="l00487"></a>00487 nla = (<span class="keyword">struct </span>nlattr *) nlmsg_tail(n->nm_nlh);
<a name="l00488"></a>00488 nla->nla_type = attrtype;
<a name="l00489"></a>00489 nla->nla_len = <a class="code" href="group__attr.html#ga894e1ded50d0d62748a2b9b5f7195938" title="length of attribute not including padding">nla_attr_size</a>(attrlen);
<a name="l00490"></a>00490
<a name="l00491"></a>00491 memset((<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *) nla + nla->nla_len, 0, <a class="code" href="group__attr.html#gae24ddf8c4bb186eaaed15ecb2d08b816" title="length of padding at the tail of the attribute">nla_padlen</a>(attrlen));
<a name="l00492"></a>00492 n->nm_nlh->nlmsg_len = tlen;
<a name="l00493"></a>00493
<a name="l00494"></a>00494 NL_DBG(2, <span class="stringliteral">"msg %p: Reserved %d bytes at offset +%td for attr %d "</span>
<a name="l00495"></a>00495 <span class="stringliteral">"nlmsg_len=%d\n"</span>, n, attrlen,
<a name="l00496"></a>00496 (<span class="keywordtype">void</span> *) nla - <a class="code" href="group__msg.html#gae44a904bb40c8b5f5ff31539c21cfa5a" title="head of message payload">nlmsg_data</a>(n->nm_nlh),
<a name="l00497"></a>00497 attrtype, n->nm_nlh->nlmsg_len);
<a name="l00498"></a>00498
<a name="l00499"></a>00499 <span class="keywordflow">return</span> nla;
<a name="l00500"></a>00500 }
<a name="l00501"></a>00501 <span class="comment"></span>
<a name="l00502"></a>00502 <span class="comment">/**</span>
<a name="l00503"></a>00503 <span class="comment"> * Add a netlink attribute to a netlink message</span>
<a name="l00504"></a>00504 <span class="comment"> * @arg n netlink message</span>
<a name="l00505"></a>00505 <span class="comment"> * @arg attrtype attribute type</span>
<a name="l00506"></a>00506 <span class="comment"> * @arg attrlen length of attribute payload</span>
<a name="l00507"></a>00507 <span class="comment"> * @arg data head of attribute payload</span>
<a name="l00508"></a>00508 <span class="comment"> *</span>
<a name="l00509"></a>00509 <span class="comment"> * @return -1 if the tailroom of the skb is insufficient to store</span>
<a name="l00510"></a>00510 <span class="comment"> * the attribute header and payload.</span>
<a name="l00511"></a>00511 <span class="comment"> */</span>
<a name="l00512"></a><a class="code" href="group__attr.html#ga8b3964330f885da7f204d5e4609e4761">00512</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#ga8b3964330f885da7f204d5e4609e4761" title="Add a netlink attribute to a netlink message.">nla_put</a>(<span class="keyword">struct</span> nl_msg *n, <span class="keywordtype">int</span> attrtype, <span class="keywordtype">int</span> attrlen, <span class="keyword">const</span> <span class="keywordtype">void</span> *data)
<a name="l00513"></a>00513 {
<a name="l00514"></a>00514 <span class="keyword">struct </span>nlattr *nla;
<a name="l00515"></a>00515
<a name="l00516"></a>00516 nla = <a class="code" href="group__attr.html#gab738cbc916a17baca88aeed2e67dddc2" title="reserve room for attribute on the skb">nla_reserve</a>(n, attrtype, attrlen);
<a name="l00517"></a>00517 <span class="keywordflow">if</span> (!nla)
<a name="l00518"></a>00518 <span class="keywordflow">return</span> nl_errno(ENOMEM);
<a name="l00519"></a>00519
<a name="l00520"></a>00520 memcpy(<a class="code" href="group__attr.html#gaf39d6bbd2be1fc2de30b6b7d079a5fce" title="head of payload">nla_data</a>(nla), data, attrlen);
<a name="l00521"></a>00521 NL_DBG(2, <span class="stringliteral">"msg %p: Wrote %d bytes at offset +%td for attr %d\n"</span>,
<a name="l00522"></a>00522 n, attrlen, (<span class="keywordtype">void</span> *) nla - <a class="code" href="group__msg.html#gae44a904bb40c8b5f5ff31539c21cfa5a" title="head of message payload">nlmsg_data</a>(n->nm_nlh), attrtype);
<a name="l00523"></a>00523
<a name="l00524"></a>00524 <span class="keywordflow">return</span> 0;
<a name="l00525"></a>00525 }
<a name="l00526"></a>00526 <span class="comment"></span>
<a name="l00527"></a>00527 <span class="comment">/**</span>
<a name="l00528"></a>00528 <span class="comment"> * Add a nested netlink attribute to a netlink message</span>
<a name="l00529"></a>00529 <span class="comment"> * @arg n netlink message</span>
<a name="l00530"></a>00530 <span class="comment"> * @arg attrtype attribute type</span>
<a name="l00531"></a>00531 <span class="comment"> * @arg nested netlink attribute to nest</span>
<a name="l00532"></a>00532 <span class="comment"> *</span>
<a name="l00533"></a>00533 <span class="comment"> * @return -1 if the tailroom of the skb is insufficient to store</span>
<a name="l00534"></a>00534 <span class="comment"> * the attribute header and payload.</span>
<a name="l00535"></a>00535 <span class="comment"> */</span>
<a name="l00536"></a><a class="code" href="group__attr.html#gafe7bad603c92ecee0dfc0cc112dd1182">00536</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#gafe7bad603c92ecee0dfc0cc112dd1182" title="Add a nested netlink attribute to a netlink message.">nla_put_nested</a>(<span class="keyword">struct</span> nl_msg *n, <span class="keywordtype">int</span> attrtype, <span class="keyword">struct</span> nl_msg *nested)
<a name="l00537"></a>00537 {
<a name="l00538"></a>00538 <span class="keywordflow">return</span> <a class="code" href="group__attr.html#ga8b3964330f885da7f204d5e4609e4761" title="Add a netlink attribute to a netlink message.">nla_put</a>(n, attrtype, <a class="code" href="group__msg.html#gafa0898e9ec7d59a8faa1e4f0ed3168bf" title="length of message payload">nlmsg_len</a>(nested->nm_nlh),
<a name="l00539"></a>00539 <a class="code" href="group__msg.html#gae44a904bb40c8b5f5ff31539c21cfa5a" title="head of message payload">nlmsg_data</a>(nested->nm_nlh));
<a name="l00540"></a>00540 }
<a name="l00541"></a>00541 <span class="comment"></span>
<a name="l00542"></a>00542 <span class="comment">/**</span>
<a name="l00543"></a>00543 <span class="comment"> * Add a u16 netlink attribute to a netlink message</span>
<a name="l00544"></a>00544 <span class="comment"> * @arg n netlink message</span>
<a name="l00545"></a>00545 <span class="comment"> * @arg attrtype attribute type</span>
<a name="l00546"></a>00546 <span class="comment"> * @arg value numeric value</span>
<a name="l00547"></a>00547 <span class="comment"> */</span>
<a name="l00548"></a><a class="code" href="group__attr.html#ga14cf4e429de0cb05f37d4e1489914b28">00548</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#ga14cf4e429de0cb05f37d4e1489914b28" title="Add a u16 netlink attribute to a netlink message.">nla_put_u8</a>(<span class="keyword">struct</span> nl_msg *n, <span class="keywordtype">int</span> attrtype, uint8_t value)
<a name="l00549"></a>00549 {
<a name="l00550"></a>00550 <span class="keywordflow">return</span> <a class="code" href="group__attr.html#ga8b3964330f885da7f204d5e4609e4761" title="Add a netlink attribute to a netlink message.">nla_put</a>(n, attrtype, <span class="keyword">sizeof</span>(uint8_t), &value);
<a name="l00551"></a>00551 }
<a name="l00552"></a>00552 <span class="comment"></span>
<a name="l00553"></a>00553 <span class="comment">/**</span>
<a name="l00554"></a>00554 <span class="comment"> * Add a u16 netlink attribute to a netlink message</span>
<a name="l00555"></a>00555 <span class="comment"> * @arg n netlink message</span>
<a name="l00556"></a>00556 <span class="comment"> * @arg attrtype attribute type</span>
<a name="l00557"></a>00557 <span class="comment"> * @arg value numeric value</span>
<a name="l00558"></a>00558 <span class="comment"> */</span>
<a name="l00559"></a><a class="code" href="group__attr.html#gaf44eb15a7becdfb2833a4bf1b5cd8571">00559</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#gaf44eb15a7becdfb2833a4bf1b5cd8571" title="Add a u16 netlink attribute to a netlink message.">nla_put_u16</a>(<span class="keyword">struct</span> nl_msg *n, <span class="keywordtype">int</span> attrtype, uint16_t value)
<a name="l00560"></a>00560 {
<a name="l00561"></a>00561 <span class="keywordflow">return</span> <a class="code" href="group__attr.html#ga8b3964330f885da7f204d5e4609e4761" title="Add a netlink attribute to a netlink message.">nla_put</a>(n, attrtype, <span class="keyword">sizeof</span>(uint16_t), &value);
<a name="l00562"></a>00562 }
<a name="l00563"></a>00563 <span class="comment"></span>
<a name="l00564"></a>00564 <span class="comment">/**</span>
<a name="l00565"></a>00565 <span class="comment"> * Add a u32 netlink attribute to a netlink message</span>
<a name="l00566"></a>00566 <span class="comment"> * @arg n netlink message</span>
<a name="l00567"></a>00567 <span class="comment"> * @arg attrtype attribute type</span>
<a name="l00568"></a>00568 <span class="comment"> * @arg value numeric value</span>
<a name="l00569"></a>00569 <span class="comment"> */</span>
<a name="l00570"></a><a class="code" href="group__attr.html#ga9891f766dcebe6bdb2ce86f021c6f6e6">00570</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#ga9891f766dcebe6bdb2ce86f021c6f6e6" title="Add a u32 netlink attribute to a netlink message.">nla_put_u32</a>(<span class="keyword">struct</span> nl_msg *n, <span class="keywordtype">int</span> attrtype, uint32_t value)
<a name="l00571"></a>00571 {
<a name="l00572"></a>00572 <span class="keywordflow">return</span> <a class="code" href="group__attr.html#ga8b3964330f885da7f204d5e4609e4761" title="Add a netlink attribute to a netlink message.">nla_put</a>(n, attrtype, <span class="keyword">sizeof</span>(uint32_t), &value);
<a name="l00573"></a>00573 }
<a name="l00574"></a>00574 <span class="comment"></span>
<a name="l00575"></a>00575 <span class="comment">/**</span>
<a name="l00576"></a>00576 <span class="comment"> * Add a u64 netlink attribute to a netlink message</span>
<a name="l00577"></a>00577 <span class="comment"> * @arg n netlink message</span>
<a name="l00578"></a>00578 <span class="comment"> * @arg attrtype attribute type</span>
<a name="l00579"></a>00579 <span class="comment"> * @arg value numeric value</span>
<a name="l00580"></a>00580 <span class="comment"> */</span>
<a name="l00581"></a><a class="code" href="group__attr.html#gade5cf81c340ddb0656842bb554f3cbfe">00581</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#gade5cf81c340ddb0656842bb554f3cbfe" title="Add a u64 netlink attribute to a netlink message.">nla_put_u64</a>(<span class="keyword">struct</span> nl_msg *n, <span class="keywordtype">int</span> attrtype, uint64_t value)
<a name="l00582"></a>00582 {
<a name="l00583"></a>00583 <span class="keywordflow">return</span> <a class="code" href="group__attr.html#ga8b3964330f885da7f204d5e4609e4761" title="Add a netlink attribute to a netlink message.">nla_put</a>(n, attrtype, <span class="keyword">sizeof</span>(uint64_t), &value);
<a name="l00584"></a>00584 }
<a name="l00585"></a>00585 <span class="comment"></span>
<a name="l00586"></a>00586 <span class="comment">/**</span>
<a name="l00587"></a>00587 <span class="comment"> * Add a string netlink attribute to a netlink message</span>
<a name="l00588"></a>00588 <span class="comment"> * @arg n netlink message</span>
<a name="l00589"></a>00589 <span class="comment"> * @arg attrtype attribute type</span>
<a name="l00590"></a>00590 <span class="comment"> * @arg str NUL terminated string</span>
<a name="l00591"></a>00591 <span class="comment"> */</span>
<a name="l00592"></a><a class="code" href="group__attr.html#gacf85c1c8becd42e29f03670553b6e2f3">00592</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#gacf85c1c8becd42e29f03670553b6e2f3" title="Add a string netlink attribute to a netlink message.">nla_put_string</a>(<span class="keyword">struct</span> nl_msg *n, <span class="keywordtype">int</span> attrtype, <span class="keyword">const</span> <span class="keywordtype">char</span> *str)
<a name="l00593"></a>00593 {
<a name="l00594"></a>00594 <span class="keywordflow">return</span> <a class="code" href="group__attr.html#ga8b3964330f885da7f204d5e4609e4761" title="Add a netlink attribute to a netlink message.">nla_put</a>(n, attrtype, strlen(str) + 1, str);
<a name="l00595"></a>00595 }
<a name="l00596"></a>00596 <span class="comment"></span>
<a name="l00597"></a>00597 <span class="comment">/**</span>
<a name="l00598"></a>00598 <span class="comment"> * Add a flag netlink attribute to a netlink message</span>
<a name="l00599"></a>00599 <span class="comment"> * @arg n netlink message</span>
<a name="l00600"></a>00600 <span class="comment"> * @arg attrtype attribute type</span>
<a name="l00601"></a>00601 <span class="comment"> */</span>
<a name="l00602"></a><a class="code" href="group__attr.html#ga669fcc00e7114fb8f7d800a8b48ff0a9">00602</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#ga669fcc00e7114fb8f7d800a8b48ff0a9" title="Add a flag netlink attribute to a netlink message.">nla_put_flag</a>(<span class="keyword">struct</span> nl_msg *n, <span class="keywordtype">int</span> attrtype)
<a name="l00603"></a>00603 {
<a name="l00604"></a>00604 <span class="keywordflow">return</span> <a class="code" href="group__attr.html#ga8b3964330f885da7f204d5e4609e4761" title="Add a netlink attribute to a netlink message.">nla_put</a>(n, attrtype, 0, NULL);
<a name="l00605"></a>00605 }
<a name="l00606"></a>00606 <span class="comment"></span>
<a name="l00607"></a>00607 <span class="comment">/**</span>
<a name="l00608"></a>00608 <span class="comment"> * Add a msecs netlink attribute to a netlink message</span>
<a name="l00609"></a>00609 <span class="comment"> * @arg n netlink message</span>
<a name="l00610"></a>00610 <span class="comment"> * @arg attrtype attribute type</span>
<a name="l00611"></a>00611 <span class="comment"> * @arg msecs number of msecs</span>
<a name="l00612"></a>00612 <span class="comment"> */</span>
<a name="l00613"></a><a class="code" href="group__attr.html#ga80f366ccf41b1820c7faf95c76b2d718">00613</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#ga80f366ccf41b1820c7faf95c76b2d718" title="Add a msecs netlink attribute to a netlink message.">nla_put_msecs</a>(<span class="keyword">struct</span> nl_msg *n, <span class="keywordtype">int</span> attrtype, <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> msecs)
<a name="l00614"></a>00614 {
<a name="l00615"></a>00615 <span class="keywordflow">return</span> <a class="code" href="group__attr.html#gade5cf81c340ddb0656842bb554f3cbfe" title="Add a u64 netlink attribute to a netlink message.">nla_put_u64</a>(n, attrtype, msecs);
<a name="l00616"></a>00616 }
<a name="l00617"></a>00617 <span class="comment"></span>
<a name="l00618"></a>00618 <span class="comment">/**</span>
<a name="l00619"></a>00619 <span class="comment"> * Add an abstract data netlink attribute to a netlink message</span>
<a name="l00620"></a>00620 <span class="comment"> * @arg n netlink message</span>
<a name="l00621"></a>00621 <span class="comment"> * @arg attrtype attribute type</span>
<a name="l00622"></a>00622 <span class="comment"> * @arg data abstract data</span>
<a name="l00623"></a>00623 <span class="comment"> */</span>
<a name="l00624"></a><a class="code" href="group__attr.html#gad07458aa26ae9a430fb9ff8d444b526d">00624</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#gad07458aa26ae9a430fb9ff8d444b526d" title="Add an abstract data netlink attribute to a netlink message.">nla_put_data</a>(<span class="keyword">struct</span> nl_msg *n, <span class="keywordtype">int</span> attrtype, <span class="keyword">struct</span> nl_data *data)
<a name="l00625"></a>00625 {
<a name="l00626"></a>00626 <span class="keywordflow">return</span> <a class="code" href="group__attr.html#ga8b3964330f885da7f204d5e4609e4761" title="Add a netlink attribute to a netlink message.">nla_put</a>(n, attrtype, <a class="code" href="group__data.html#ga6dbaf24a42f29514e30665c9e42a3d1c" title="Get size of data buffer of abstract data object.">nl_data_get_size</a>(data),
<a name="l00627"></a>00627 <a class="code" href="group__data.html#ga1ca4b5ea3a92643c2fe94dd4eeef072b" title="Get data buffer of abstract data object.">nl_data_get</a>(data));
<a name="l00628"></a>00628 }
<a name="l00629"></a>00629 <span class="comment"></span>
<a name="l00630"></a>00630 <span class="comment">/**</span>
<a name="l00631"></a>00631 <span class="comment"> * Add an abstract address netlink attribute to a netlink message</span>
<a name="l00632"></a>00632 <span class="comment"> * @arg n netlink message</span>
<a name="l00633"></a>00633 <span class="comment"> * @arg attrtype attribute type</span>
<a name="l00634"></a>00634 <span class="comment"> * @arg addr abstract address</span>
<a name="l00635"></a>00635 <span class="comment"> */</span>
<a name="l00636"></a><a class="code" href="group__attr.html#gafd639c95cec147ae3b7dd9717a66e339">00636</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#gafd639c95cec147ae3b7dd9717a66e339" title="Add an abstract address netlink attribute to a netlink message.">nla_put_addr</a>(<span class="keyword">struct</span> nl_msg *n, <span class="keywordtype">int</span> attrtype, <span class="keyword">struct</span> nl_addr *addr)
<a name="l00637"></a>00637 {
<a name="l00638"></a>00638 <span class="keywordflow">return</span> <a class="code" href="group__attr.html#ga8b3964330f885da7f204d5e4609e4761" title="Add a netlink attribute to a netlink message.">nla_put</a>(n, attrtype, <a class="code" href="group__addr.html#ga6c517a330f9fd12db0844f7ac0c72134" title="Get length of binary address of abstract address object.">nl_addr_get_len</a>(addr),
<a name="l00639"></a>00639 <a class="code" href="group__addr.html#ga7721da4e82e80e8b29960405539ca72d" title="Get binary address of abstract address object.">nl_addr_get_binary_addr</a>(addr));
<a name="l00640"></a>00640 }
<a name="l00641"></a>00641 <span class="comment"></span>
<a name="l00642"></a>00642 <span class="comment">/** @} */</span>
<a name="l00643"></a>00643 <span class="comment"></span>
<a name="l00644"></a>00644 <span class="comment">/**</span>
<a name="l00645"></a>00645 <span class="comment"> * @name Attribute Nesting</span>
<a name="l00646"></a>00646 <span class="comment"> * @{</span>
<a name="l00647"></a>00647 <span class="comment"> */</span>
<a name="l00648"></a>00648 <span class="comment"></span>
<a name="l00649"></a>00649 <span class="comment">/**</span>
<a name="l00650"></a>00650 <span class="comment"> * Start a new level of nested attributes</span>
<a name="l00651"></a>00651 <span class="comment"> * @arg n netlink message</span>
<a name="l00652"></a>00652 <span class="comment"> * @arg attrtype attribute type of container</span>
<a name="l00653"></a>00653 <span class="comment"> *</span>
<a name="l00654"></a>00654 <span class="comment"> * @return the container attribute</span>
<a name="l00655"></a>00655 <span class="comment"> */</span>
<a name="l00656"></a><a class="code" href="group__attr.html#ga18640b6320b8959bb586fa2ca456130c">00656</a> <span class="keyword">struct </span>nlattr *<a class="code" href="group__attr.html#ga18640b6320b8959bb586fa2ca456130c" title="Start a new level of nested attributes.">nla_nest_start</a>(<span class="keyword">struct</span> nl_msg *n, <span class="keywordtype">int</span> attrtype)
<a name="l00657"></a>00657 {
<a name="l00658"></a>00658 <span class="keyword">struct </span>nlattr *start = (<span class="keyword">struct </span>nlattr *) nlmsg_tail(n->nm_nlh);
<a name="l00659"></a>00659
<a name="l00660"></a>00660 <span class="keywordflow">if</span> (<a class="code" href="group__attr.html#ga8b3964330f885da7f204d5e4609e4761" title="Add a netlink attribute to a netlink message.">nla_put</a>(n, attrtype, 0, NULL) < 0)
<a name="l00661"></a>00661 <span class="keywordflow">return</span> NULL;
<a name="l00662"></a>00662
<a name="l00663"></a>00663 <span class="keywordflow">return</span> start;
<a name="l00664"></a>00664 }
<a name="l00665"></a>00665 <span class="comment"></span>
<a name="l00666"></a>00666 <span class="comment">/**</span>
<a name="l00667"></a>00667 <span class="comment"> * Finalize nesting of attributes</span>
<a name="l00668"></a>00668 <span class="comment"> * @arg n netlink message</span>
<a name="l00669"></a>00669 <span class="comment"> * @arg start container attribute</span>
<a name="l00670"></a>00670 <span class="comment"> *</span>
<a name="l00671"></a>00671 <span class="comment"> * Corrects the container attribute header to include the all</span>
<a name="l00672"></a>00672 <span class="comment"> * appeneded attributes.</span>
<a name="l00673"></a>00673 <span class="comment"> *</span>
<a name="l00674"></a>00674 <span class="comment"> * @return the total data length of the skb.</span>
<a name="l00675"></a>00675 <span class="comment"> */</span>
<a name="l00676"></a><a class="code" href="group__attr.html#ga067f9ada74902c02d97c725a47f590b7">00676</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#ga067f9ada74902c02d97c725a47f590b7" title="Finalize nesting of attributes.">nla_nest_end</a>(<span class="keyword">struct</span> nl_msg *n, <span class="keyword">struct</span> nlattr *start)
<a name="l00677"></a>00677 {
<a name="l00678"></a>00678 start->nla_len = (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *) nlmsg_tail(n->nm_nlh) -
<a name="l00679"></a>00679 (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *) start;
<a name="l00680"></a>00680 <span class="keywordflow">return</span> 0;
<a name="l00681"></a>00681 }
<a name="l00682"></a>00682 <span class="comment"></span>
<a name="l00683"></a>00683 <span class="comment">/** @} */</span>
<a name="l00684"></a>00684 <span class="comment"></span>
<a name="l00685"></a>00685 <span class="comment">/**</span>
<a name="l00686"></a>00686 <span class="comment"> * @name Attribute Reading</span>
<a name="l00687"></a>00687 <span class="comment"> * @{</span>
<a name="l00688"></a>00688 <span class="comment"> */</span>
<a name="l00689"></a>00689 <span class="comment"></span>
<a name="l00690"></a>00690 <span class="comment">/**</span>
<a name="l00691"></a>00691 <span class="comment"> * Return payload of u32 attribute</span>
<a name="l00692"></a>00692 <span class="comment"> * @arg nla u32 netlink attribute</span>
<a name="l00693"></a>00693 <span class="comment"> */</span>
<a name="l00694"></a><a class="code" href="group__attr.html#gabda0290a8b26cc577c2c5cefa814aeac">00694</a> uint32_t <a class="code" href="group__attr.html#gabda0290a8b26cc577c2c5cefa814aeac" title="Return payload of u32 attribute.">nla_get_u32</a>(<span class="keyword">struct</span> nlattr *nla)
<a name="l00695"></a>00695 {
<a name="l00696"></a>00696 <span class="keywordflow">return</span> *(uint32_t *) <a class="code" href="group__attr.html#gaf39d6bbd2be1fc2de30b6b7d079a5fce" title="head of payload">nla_data</a>(nla);
<a name="l00697"></a>00697 }
<a name="l00698"></a>00698 <span class="comment"></span>
<a name="l00699"></a>00699 <span class="comment">/**</span>
<a name="l00700"></a>00700 <span class="comment"> * Return payload of u16 attribute</span>
<a name="l00701"></a>00701 <span class="comment"> * @arg nla u16 netlink attribute</span>
<a name="l00702"></a>00702 <span class="comment"> */</span>
<a name="l00703"></a><a class="code" href="group__attr.html#ga60c1be303721d4a39ad810876a13d304">00703</a> uint16_t <a class="code" href="group__attr.html#ga60c1be303721d4a39ad810876a13d304" title="Return payload of u16 attribute.">nla_get_u16</a>(<span class="keyword">struct</span> nlattr *nla)
<a name="l00704"></a>00704 {
<a name="l00705"></a>00705 <span class="keywordflow">return</span> *(uint16_t *) <a class="code" href="group__attr.html#gaf39d6bbd2be1fc2de30b6b7d079a5fce" title="head of payload">nla_data</a>(nla);
<a name="l00706"></a>00706 }
<a name="l00707"></a>00707 <span class="comment"></span>
<a name="l00708"></a>00708 <span class="comment">/**</span>
<a name="l00709"></a>00709 <span class="comment"> * Return payload of u8 attribute</span>
<a name="l00710"></a>00710 <span class="comment"> * @arg nla u8 netlink attribute</span>
<a name="l00711"></a>00711 <span class="comment"> */</span>
<a name="l00712"></a><a class="code" href="group__attr.html#ga9ca4618a38f1567b1e42b1f21be887c9">00712</a> uint8_t <a class="code" href="group__attr.html#ga9ca4618a38f1567b1e42b1f21be887c9" title="Return payload of u8 attribute.">nla_get_u8</a>(<span class="keyword">struct</span> nlattr *nla)
<a name="l00713"></a>00713 {
<a name="l00714"></a>00714 <span class="keywordflow">return</span> *(uint8_t *) <a class="code" href="group__attr.html#gaf39d6bbd2be1fc2de30b6b7d079a5fce" title="head of payload">nla_data</a>(nla);
<a name="l00715"></a>00715 }
<a name="l00716"></a>00716 <span class="comment"></span>
<a name="l00717"></a>00717 <span class="comment">/**</span>
<a name="l00718"></a>00718 <span class="comment"> * Return payload of u64 attribute</span>
<a name="l00719"></a>00719 <span class="comment"> * @arg nla u64 netlink attribute</span>
<a name="l00720"></a>00720 <span class="comment"> */</span>
<a name="l00721"></a><a class="code" href="group__attr.html#ga517d3ae28480ef44fec7b1e3d2fb29e6">00721</a> uint64_t <a class="code" href="group__attr.html#ga517d3ae28480ef44fec7b1e3d2fb29e6" title="Return payload of u64 attribute.">nla_get_u64</a>(<span class="keyword">struct</span> nlattr *nla)
<a name="l00722"></a>00722 {
<a name="l00723"></a>00723 uint64_t tmp;
<a name="l00724"></a>00724
<a name="l00725"></a>00725 <a class="code" href="group__attr.html#gaf2cdaf473a1054b9c3fc735ca7275403" title="Copy a netlink attribute into another memory area.">nla_memcpy</a>(&tmp, nla, <span class="keyword">sizeof</span>(tmp));
<a name="l00726"></a>00726
<a name="l00727"></a>00727 <span class="keywordflow">return</span> tmp;
<a name="l00728"></a>00728 }
<a name="l00729"></a>00729 <span class="comment"></span>
<a name="l00730"></a>00730 <span class="comment">/**</span>
<a name="l00731"></a>00731 <span class="comment"> * return payload of string attribute</span>
<a name="l00732"></a>00732 <span class="comment"> * @arg nla string netlink attribute</span>
<a name="l00733"></a>00733 <span class="comment"> */</span>
<a name="l00734"></a><a class="code" href="group__attr.html#ga99baaa7c85d04eaece8f5eea34d8e2e9">00734</a> <span class="keywordtype">char</span> *<a class="code" href="group__attr.html#ga99baaa7c85d04eaece8f5eea34d8e2e9" title="return payload of string attribute">nla_get_string</a>(<span class="keyword">struct</span> nlattr *nla)
<a name="l00735"></a>00735 {
<a name="l00736"></a>00736 <span class="keywordflow">return</span> (<span class="keywordtype">char</span> *) <a class="code" href="group__attr.html#gaf39d6bbd2be1fc2de30b6b7d079a5fce" title="head of payload">nla_data</a>(nla);
<a name="l00737"></a>00737 }
<a name="l00738"></a>00738 <span class="comment"></span>
<a name="l00739"></a>00739 <span class="comment">/**</span>
<a name="l00740"></a>00740 <span class="comment"> * Return payload of flag attribute</span>
<a name="l00741"></a>00741 <span class="comment"> * @arg nla flag netlink attribute</span>
<a name="l00742"></a>00742 <span class="comment"> */</span>
<a name="l00743"></a><a class="code" href="group__attr.html#ga7ca9e726c046a2953aecf22bc9cece0a">00743</a> <span class="keywordtype">int</span> <a class="code" href="group__attr.html#ga7ca9e726c046a2953aecf22bc9cece0a" title="Return payload of flag attribute.">nla_get_flag</a>(<span class="keyword">struct</span> nlattr *nla)
<a name="l00744"></a>00744 {
<a name="l00745"></a>00745 <span class="keywordflow">return</span> !!nla;
<a name="l00746"></a>00746 }
<a name="l00747"></a>00747 <span class="comment"></span>
<a name="l00748"></a>00748 <span class="comment">/**</span>
<a name="l00749"></a>00749 <span class="comment"> * Return payload of msecs attribute</span>
<a name="l00750"></a>00750 <span class="comment"> * @arg nla msecs netlink attribute</span>
<a name="l00751"></a>00751 <span class="comment"> *</span>
<a name="l00752"></a>00752 <span class="comment"> * @return the number of milliseconds.</span>
<a name="l00753"></a>00753 <span class="comment"> */</span>
<a name="l00754"></a><a class="code" href="group__attr.html#gad785952a48597a2fafc6268ac999afe8">00754</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <a class="code" href="group__attr.html#gad785952a48597a2fafc6268ac999afe8" title="Return payload of msecs attribute.">nla_get_msecs</a>(<span class="keyword">struct</span> nlattr *nla)
<a name="l00755"></a>00755 {
<a name="l00756"></a>00756 <span class="keywordflow">return</span> <a class="code" href="group__attr.html#ga517d3ae28480ef44fec7b1e3d2fb29e6" title="Return payload of u64 attribute.">nla_get_u64</a>(nla);
<a name="l00757"></a>00757 }
<a name="l00758"></a>00758 <span class="comment"></span>
<a name="l00759"></a>00759 <span class="comment">/**</span>
<a name="l00760"></a>00760 <span class="comment"> * Return payload of address attribute</span>
<a name="l00761"></a>00761 <span class="comment"> * @arg nla address netlink attribute</span>
<a name="l00762"></a>00762 <span class="comment"> * @arg family address family</span>
<a name="l00763"></a>00763 <span class="comment"> *</span>
<a name="l00764"></a>00764 <span class="comment"> * @return Newly allocated address handle or NULL</span>
<a name="l00765"></a>00765 <span class="comment"> */</span>
<a name="l00766"></a><a class="code" href="group__attr.html#ga98a5ac1eefea9266cf46c91b9a9867f3">00766</a> <span class="keyword">struct </span>nl_addr *<a class="code" href="group__attr.html#ga98a5ac1eefea9266cf46c91b9a9867f3" title="Return payload of address attribute.">nla_get_addr</a>(<span class="keyword">struct</span> nlattr *nla, <span class="keywordtype">int</span> family)
<a name="l00767"></a>00767 {
<a name="l00768"></a>00768 <span class="keywordflow">return</span> <a class="code" href="group__addr.html#ga3ba58249a980740157be8a4fca3635fd" title="Allocate new abstract address object based on a binary address.">nl_addr_build</a>(family, <a class="code" href="group__attr.html#gaf39d6bbd2be1fc2de30b6b7d079a5fce" title="head of payload">nla_data</a>(nla), <a class="code" href="group__attr.html#gac5a7705797946fa9c0775997bb8d130b" title="length of payload">nla_len</a>(nla));
<a name="l00769"></a>00769 }
<a name="l00770"></a>00770 <span class="comment"></span>
<a name="l00771"></a>00771 <span class="comment">/**</span>
<a name="l00772"></a>00772 <span class="comment"> * Return payload of abstract data attribute</span>
<a name="l00773"></a>00773 <span class="comment"> * @arg nla abstract data netlink attribute</span>
<a name="l00774"></a>00774 <span class="comment"> *</span>
<a name="l00775"></a>00775 <span class="comment"> * @return Newly allocated abstract data handle or NULL</span>
<a name="l00776"></a>00776 <span class="comment"> */</span>
<a name="l00777"></a><a class="code" href="group__attr.html#ga33a5aef23c5d26c8247632ed1f167068">00777</a> <span class="keyword">struct </span>nl_data *<a class="code" href="group__attr.html#ga33a5aef23c5d26c8247632ed1f167068" title="Return payload of abstract data attribute.">nla_get_data</a>(<span class="keyword">struct</span> nlattr *nla)
<a name="l00778"></a>00778 {
<a name="l00779"></a>00779 <span class="keywordflow">return</span> <a class="code" href="group__data.html#gafd58c229c0e4dd4dcea07c8d8493c144" title="Allocate a new abstract data object.">nl_data_alloc</a>(<a class="code" href="group__attr.html#gaf39d6bbd2be1fc2de30b6b7d079a5fce" title="head of payload">nla_data</a>(nla), <a class="code" href="group__attr.html#gac5a7705797946fa9c0775997bb8d130b" title="length of payload">nla_len</a>(nla));
<a name="l00780"></a>00780 }
<a name="l00781"></a>00781 <span class="comment"></span>
<a name="l00782"></a>00782 <span class="comment">/** @} */</span>
<a name="l00783"></a>00783 <span class="comment"></span>
<a name="l00784"></a>00784 <span class="comment">/** @} */</span>
</pre></div></div>
</div>
<hr class="footer"/><address class="footer"><small>Generated on Mon Mar 21 2011 for libnl by 
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.3 </small></address>
</body>
</html>
distrib
>
Fedora
>
14
>
x86_64
>
media
>
updates
>
by-pkgid
>
87b89b73c41f4440bb86afd421c7548f
>
files
>
65
