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libnl-devel-1.1-14.fc14.x86_64.rpm

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<h1>include/netlink/msg.h</h1>  </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * netlink/msg.c                Netlink Messages Interface</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 &lt;tgraf@suug.ch&gt;</span>
<a name="l00010"></a>00010 <span class="comment"> */</span>
<a name="l00011"></a>00011 
<a name="l00012"></a>00012 <span class="preprocessor">#ifndef NETLINK_MSG_H_</span>
<a name="l00013"></a>00013 <span class="preprocessor"></span><span class="preprocessor">#define NETLINK_MSG_H_</span>
<a name="l00014"></a>00014 <span class="preprocessor"></span>
<a name="l00015"></a>00015 <span class="preprocessor">#include &lt;netlink/netlink.h&gt;</span>
<a name="l00016"></a>00016 <span class="preprocessor">#include &lt;netlink/object.h&gt;</span>
<a name="l00017"></a>00017 <span class="preprocessor">#include &lt;netlink/attr.h&gt;</span>
<a name="l00018"></a>00018 
<a name="l00019"></a>00019 <span class="preprocessor">#ifdef __cplusplus</span>
<a name="l00020"></a>00020 <span class="preprocessor"></span><span class="keyword">extern</span> <span class="stringliteral">&quot;C&quot;</span> {
<a name="l00021"></a>00021 <span class="preprocessor">#endif</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span>
<a name="l00023"></a>00023 <span class="preprocessor">#define NL_DONTPAD      0</span>
<a name="l00024"></a>00024 <span class="preprocessor"></span><span class="comment"></span>
<a name="l00025"></a>00025 <span class="comment">/**</span>
<a name="l00026"></a>00026 <span class="comment"> * @ingroup msg</span>
<a name="l00027"></a>00027 <span class="comment"> * @brief</span>
<a name="l00028"></a>00028 <span class="comment"> * Will cause the netlink pid to be set to the pid assigned to</span>
<a name="l00029"></a>00029 <span class="comment"> * the netlink handle (socket) just before sending the message off.</span>
<a name="l00030"></a>00030 <span class="comment"> * @note Requires the use of nl_send_auto_complete()!</span>
<a name="l00031"></a>00031 <span class="comment"> */</span>
<a name="l00032"></a><a class="code" href="group__msg.html#gaf1a05ed4b58b0d3a0409f2a749e0c91c">00032</a> <span class="preprocessor">#define NL_AUTO_PID     0</span>
<a name="l00033"></a>00033 <span class="preprocessor"></span><span class="comment"></span>
<a name="l00034"></a>00034 <span class="comment">/**</span>
<a name="l00035"></a>00035 <span class="comment"> * @ingroup msg</span>
<a name="l00036"></a>00036 <span class="comment"> * @brief</span>
<a name="l00037"></a>00037 <span class="comment"> * May be used to refer to a sequence number which should be</span>
<a name="l00038"></a>00038 <span class="comment"> * automatically set just before sending the message off.</span>
<a name="l00039"></a>00039 <span class="comment"> * @note Requires the use of nl_send_auto_complete()!</span>
<a name="l00040"></a>00040 <span class="comment"> */</span>
<a name="l00041"></a><a class="code" href="group__msg.html#gaca80a9f4084020b28afdb663b670dc4b">00041</a> <span class="preprocessor">#define NL_AUTO_SEQ     0</span>
<a name="l00042"></a>00042 <span class="preprocessor"></span>
<a name="l00043"></a>00043 <span class="keyword">struct </span>nl_msg;
<a name="l00044"></a>00044 <span class="keyword">struct </span>nl_tree;
<a name="l00045"></a>00045 <span class="keyword">struct </span>ucred;
<a name="l00046"></a>00046 
<a name="l00047"></a>00047 <span class="comment">/* size calculations */</span>
<a name="l00048"></a>00048 <span class="keyword">extern</span> <span class="keywordtype">int</span>                <a class="code" href="group__msg.html#ga3790ddfe9268d3b63f3cd1ceb9bb2f83" title="length of netlink message not including padding">nlmsg_msg_size</a>(<span class="keywordtype">int</span>);
<a name="l00049"></a>00049 <span class="keyword">extern</span> <span class="keywordtype">int</span>                <a class="code" href="group__msg.html#ga0734c5b291e451c26051ad3b6ef083bd" title="length of netlink message including padding">nlmsg_total_size</a>(<span class="keywordtype">int</span>);
<a name="l00050"></a>00050 <span class="keyword">extern</span> <span class="keywordtype">int</span>                <a class="code" href="group__msg.html#gad47e979aa22aca4b8eb1c90234dea678" title="length of padding at the message&amp;#39;s tail">nlmsg_padlen</a>(<span class="keywordtype">int</span>);
<a name="l00051"></a>00051 
<a name="l00052"></a>00052 <span class="comment">/* payload access */</span>
<a name="l00053"></a>00053 <span class="keyword">extern</span> <span class="keywordtype">void</span> *             <a class="code" href="group__msg.html#gae44a904bb40c8b5f5ff31539c21cfa5a" title="head of message payload">nlmsg_data</a>(<span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structnlmsghdr.html" title="Netlink message header.">nlmsghdr</a> *);
<a name="l00054"></a>00054 <span class="keyword">extern</span> <span class="keywordtype">int</span>                <a class="code" href="group__msg.html#gafa0898e9ec7d59a8faa1e4f0ed3168bf" title="length of message payload">nlmsg_len</a>(<span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structnlmsghdr.html" title="Netlink message header.">nlmsghdr</a> *);
<a name="l00055"></a>00055 <span class="keyword">extern</span> <span class="keywordtype">void</span> *             nlmsg_tail(<span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structnlmsghdr.html" title="Netlink message header.">nlmsghdr</a> *);
<a name="l00056"></a>00056 
<a name="l00057"></a>00057 <span class="comment">/* attribute access */</span>
<a name="l00058"></a>00058 <span class="keyword">extern</span> <span class="keyword">struct </span>nlattr *    <a class="code" href="group__msg.html#ga203fdf0a4637e05df44de94c60d8e909" title="head of attributes data">nlmsg_attrdata</a>(<span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structnlmsghdr.html" title="Netlink message header.">nlmsghdr</a> *, <span class="keywordtype">int</span>);
<a name="l00059"></a>00059 <span class="keyword">extern</span> <span class="keywordtype">int</span>                <a class="code" href="group__msg.html#gac9a4689d22aaa2f630476a7826f25fec" title="length of attributes data">nlmsg_attrlen</a>(<span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structnlmsghdr.html" title="Netlink message header.">nlmsghdr</a> *, <span class="keywordtype">int</span>);
<a name="l00060"></a>00060 
<a name="l00061"></a>00061 <span class="comment">/* message parsing */</span>
<a name="l00062"></a>00062 <span class="keyword">extern</span> <span class="keywordtype">int</span>                nlmsg_valid_hdr(<span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structnlmsghdr.html" title="Netlink message header.">nlmsghdr</a> *, <span class="keywordtype">int</span>);
<a name="l00063"></a>00063 <span class="keyword">extern</span> <span class="keywordtype">int</span>                <a class="code" href="group__msg.html#ga0107484894e5be506c1e1bb6cb09dbe2" title="check if the netlink message fits into the remaining bytes">nlmsg_ok</a>(<span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structnlmsghdr.html" title="Netlink message header.">nlmsghdr</a> *, <span class="keywordtype">int</span>);
<a name="l00064"></a>00064 <span class="keyword">extern</span> <span class="keyword">struct </span><a class="code" href="structnlmsghdr.html" title="Netlink message header.">nlmsghdr</a> *  <a class="code" href="group__msg.html#gafae8cbad57755ac6d758f6073cb22134" title="next netlink message in message stream">nlmsg_next</a>(<span class="keyword">struct</span> <a class="code" href="structnlmsghdr.html" title="Netlink message header.">nlmsghdr</a> *, <span class="keywordtype">int</span> *);
<a name="l00065"></a>00065 <span class="keyword">extern</span> <span class="keywordtype">int</span>                <a class="code" href="group__msg.html#ga2671eefe95c3e44dec8ddab51ae57593" title="parse attributes of a netlink message">nlmsg_parse</a>(<span class="keyword">struct</span> <a class="code" href="structnlmsghdr.html" title="Netlink message header.">nlmsghdr</a> *, <span class="keywordtype">int</span>, <span class="keyword">struct</span> nlattr **,
<a name="l00066"></a>00066                                       <span class="keywordtype">int</span>, <span class="keyword">struct</span> <a class="code" href="structnla__policy.html" title="attribute validation policy">nla_policy</a> *);
<a name="l00067"></a>00067 <span class="keyword">extern</span> <span class="keyword">struct </span>nlattr *    <a class="code" href="group__msg.html#gafd0b61236f262b7cc720b1edd01458b4" title="nlmsg_find_attr - find a specific attribute in a netlink message">nlmsg_find_attr</a>(<span class="keyword">struct</span> <a class="code" href="structnlmsghdr.html" title="Netlink message header.">nlmsghdr</a> *, <span class="keywordtype">int</span>, <span class="keywordtype">int</span>);
<a name="l00068"></a>00068 <span class="keyword">extern</span> <span class="keywordtype">int</span>                <a class="code" href="group__msg.html#gac488c8e2fcaefe96cadd33ebdc4a922f" title="nlmsg_validate - validate a netlink message including attributes">nlmsg_validate</a>(<span class="keyword">struct</span> <a class="code" href="structnlmsghdr.html" title="Netlink message header.">nlmsghdr</a> *, <span class="keywordtype">int</span>, <span class="keywordtype">int</span>,
<a name="l00069"></a>00069                                          <span class="keyword">struct</span> <a class="code" href="structnla__policy.html" title="attribute validation policy">nla_policy</a> *);
<a name="l00070"></a>00070 
<a name="l00071"></a>00071 <span class="comment">/* Backward compatibility */</span>
<a name="l00072"></a>00072 <span class="preprocessor">#define nlmsg_new()                     nlmsg_alloc()</span>
<a name="l00073"></a>00073 <span class="preprocessor"></span><span class="preprocessor">#define nlmsg_build_simple(a, b)        nlmsg_alloc_simple(a, b)</span>
<a name="l00074"></a>00074 <span class="preprocessor"></span><span class="preprocessor">#define nlmsg_build(ptr)                nlmsg_inherit(ptr)</span>
<a name="l00075"></a>00075 <span class="preprocessor"></span>
<a name="l00076"></a>00076 <span class="keyword">extern</span> <span class="keyword">struct </span>nl_msg *    <a class="code" href="group__msg.html#ga89c936bdf5e73455bb1640a0eb8a020d" title="Allocate a new netlink message with the default maximum payload size.">nlmsg_alloc</a>(<span class="keywordtype">void</span>);
<a name="l00077"></a>00077 <span class="keyword">extern</span> <span class="keyword">struct </span>nl_msg *    <a class="code" href="group__msg.html#ga0d879daa3a3a7d53fbafe0d7d72a3994" title="Allocate a new netlink message with maximum payload size specified.">nlmsg_alloc_size</a>(<span class="keywordtype">size_t</span>);
<a name="l00078"></a>00078 <span class="keyword">extern</span> <span class="keyword">struct </span>nl_msg *    <a class="code" href="group__msg.html#ga580d8697d19050c55060bc10ab4eae9f" title="Allocate a new netlink message.">nlmsg_alloc_simple</a>(<span class="keywordtype">int</span>, <span class="keywordtype">int</span>);
<a name="l00079"></a>00079 <span class="keyword">extern</span> <span class="keywordtype">void</span>               <a class="code" href="group__msg.html#gaca38cf7b85baa19aad3cf33eff7e7a85" title="Set the default maximum message payload size for allocated messages.">nlmsg_set_default_size</a>(<span class="keywordtype">size_t</span>);
<a name="l00080"></a>00080 <span class="keyword">extern</span> <span class="keyword">struct </span>nl_msg *    <a class="code" href="group__msg.html#gab89e1b4e969a091fed4ef851f3339756" title="Allocate a new netlink message and inherit netlink message header.">nlmsg_inherit</a>(<span class="keyword">struct</span> <a class="code" href="structnlmsghdr.html" title="Netlink message header.">nlmsghdr</a> *);
<a name="l00081"></a>00081 <span class="keyword">extern</span> <span class="keyword">struct </span>nl_msg *    <a class="code" href="group__msg.html#ga2695036495d7127e610bc99fee5c9674" title="Convert a netlink message received from a netlink socket to a nl_msg.">nlmsg_convert</a>(<span class="keyword">struct</span> <a class="code" href="structnlmsghdr.html" title="Netlink message header.">nlmsghdr</a> *);
<a name="l00082"></a>00082 <span class="keyword">extern</span> <span class="keywordtype">void</span> *             <a class="code" href="group__msg.html#ga206eac17e0e75ae8457a513612395554" title="Reserve room for additional data in a netlink message.">nlmsg_reserve</a>(<span class="keyword">struct</span> nl_msg *, <span class="keywordtype">size_t</span>, <span class="keywordtype">int</span>);
<a name="l00083"></a>00083 <span class="keyword">extern</span> <span class="keywordtype">int</span>                <a class="code" href="group__msg.html#gacc5e5ade5675d041f86c7c8693f7088d" title="Append data to tail of a netlink message.">nlmsg_append</a>(<span class="keyword">struct</span> nl_msg *, <span class="keywordtype">void</span> *, <span class="keywordtype">size_t</span>, <span class="keywordtype">int</span>);
<a name="l00084"></a>00084 <span class="keyword">extern</span> <span class="keywordtype">int</span>                <a class="code" href="group__msg.html#ga87ebc73ca93e5fa90742021eba448e60" title="Expand maximum payload size of a netlink message.">nlmsg_expand</a>(<span class="keyword">struct</span> nl_msg *, <span class="keywordtype">size_t</span>);
<a name="l00085"></a>00085 
<a name="l00086"></a>00086 <span class="keyword">extern</span> <span class="keyword">struct </span><a class="code" href="structnlmsghdr.html" title="Netlink message header.">nlmsghdr</a> *  <a class="code" href="group__msg.html#ga16919a9a8579f8b538b0376781c1839d" title="Add a netlink message header to a netlink message.">nlmsg_put</a>(<span class="keyword">struct</span> nl_msg *, uint32_t, uint32_t,
<a name="l00087"></a>00087                                     <span class="keywordtype">int</span>, <span class="keywordtype">int</span>, <span class="keywordtype">int</span>);
<a name="l00088"></a>00088 <span class="keyword">extern</span> <span class="keyword">struct </span><a class="code" href="structnlmsghdr.html" title="Netlink message header.">nlmsghdr</a> *  <a class="code" href="group__msg.html#gaa5f29579d86d2bdab26c312b44b56de7" title="Return actual netlink message.">nlmsg_hdr</a>(<span class="keyword">struct</span> nl_msg *);
<a name="l00089"></a>00089 <span class="keyword">extern</span> <span class="keywordtype">void</span>               <a class="code" href="group__msg.html#ga138ba9bee70553f9fbe7143deacad48c" title="Free a netlink message.">nlmsg_free</a>(<span class="keyword">struct</span> nl_msg *);
<a name="l00090"></a>00090 
<a name="l00091"></a>00091 <span class="comment">/* attribute modification */</span>
<a name="l00092"></a>00092 <span class="keyword">extern</span> <span class="keywordtype">void</span>               nlmsg_set_proto(<span class="keyword">struct</span> nl_msg *, <span class="keywordtype">int</span>);
<a name="l00093"></a>00093 <span class="keyword">extern</span> <span class="keywordtype">int</span>                nlmsg_get_proto(<span class="keyword">struct</span> nl_msg *);
<a name="l00094"></a>00094 <span class="keyword">extern</span> <span class="keywordtype">size_t</span>             nlmsg_get_max_size(<span class="keyword">struct</span> nl_msg *);
<a name="l00095"></a>00095 <span class="keyword">extern</span> <span class="keywordtype">void</span>               nlmsg_set_src(<span class="keyword">struct</span> nl_msg *, <span class="keyword">struct</span> <a class="code" href="structsockaddr__nl.html" title="Netlink socket address.">sockaddr_nl</a> *);
<a name="l00096"></a>00096 <span class="keyword">extern</span> <span class="keyword">struct </span><a class="code" href="structsockaddr__nl.html" title="Netlink socket address.">sockaddr_nl</a> *nlmsg_get_src(<span class="keyword">struct</span> nl_msg *);
<a name="l00097"></a>00097 <span class="keyword">extern</span> <span class="keywordtype">void</span>               nlmsg_set_dst(<span class="keyword">struct</span> nl_msg *, <span class="keyword">struct</span> <a class="code" href="structsockaddr__nl.html" title="Netlink socket address.">sockaddr_nl</a> *);
<a name="l00098"></a>00098 <span class="keyword">extern</span> <span class="keyword">struct </span><a class="code" href="structsockaddr__nl.html" title="Netlink socket address.">sockaddr_nl</a> *nlmsg_get_dst(<span class="keyword">struct</span> nl_msg *);
<a name="l00099"></a>00099 <span class="keyword">extern</span> <span class="keywordtype">void</span>               nlmsg_set_creds(<span class="keyword">struct</span> nl_msg *, <span class="keyword">struct</span> ucred *);
<a name="l00100"></a>00100 <span class="keyword">extern</span> <span class="keyword">struct </span>ucred *     nlmsg_get_creds(<span class="keyword">struct</span> nl_msg *);
<a name="l00101"></a>00101 
<a name="l00102"></a>00102 <span class="keyword">extern</span> <span class="keywordtype">char</span> *             nl_nlmsgtype2str(<span class="keywordtype">int</span>, <span class="keywordtype">char</span> *, <span class="keywordtype">size_t</span>);
<a name="l00103"></a>00103 <span class="keyword">extern</span> <span class="keywordtype">int</span>                nl_str2nlmsgtype(<span class="keyword">const</span> <span class="keywordtype">char</span> *);
<a name="l00104"></a>00104 
<a name="l00105"></a>00105 <span class="keyword">extern</span> <span class="keywordtype">char</span> *             nl_nlmsg_flags2str(<span class="keywordtype">int</span>, <span class="keywordtype">char</span> *, <span class="keywordtype">size_t</span>);
<a name="l00106"></a>00106 
<a name="l00107"></a>00107 <span class="keyword">extern</span> <span class="keywordtype">int</span>                nl_msg_parse(<span class="keyword">struct</span> nl_msg *,
<a name="l00108"></a>00108                                        <span class="keywordtype">void</span> (*cb)(<span class="keyword">struct</span> nl_object *, <span class="keywordtype">void</span> *),
<a name="l00109"></a>00109                                        <span class="keywordtype">void</span> *);
<a name="l00110"></a>00110 
<a name="l00111"></a>00111 <span class="keyword">extern</span> <span class="keywordtype">void</span>             <a class="code" href="group__msg.html#ga062de3af7d634b7638c053e4ba67a7eb" title="Dump message in human readable format to file descriptor.">nl_msg_dump</a>(<span class="keyword">struct</span> nl_msg *, FILE *);
<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"> * @name Iterators</span>
<a name="l00115"></a>00115 <span class="comment"> * @{</span>
<a name="l00116"></a>00116 <span class="comment"> */</span>
<a name="l00117"></a>00117 <span class="comment"></span>
<a name="l00118"></a>00118 <span class="comment">/**</span>
<a name="l00119"></a>00119 <span class="comment"> * @ingroup msg</span>
<a name="l00120"></a>00120 <span class="comment"> * Iterate over a stream of attributes in a message</span>
<a name="l00121"></a>00121 <span class="comment"> * @arg pos     loop counter, set to current attribute</span>
<a name="l00122"></a>00122 <span class="comment"> * @arg nlh     netlink message header</span>
<a name="l00123"></a>00123 <span class="comment"> * @arg hdrlen  length of family header</span>
<a name="l00124"></a>00124 <span class="comment"> * @arg rem     initialized to len, holds bytes currently remaining in stream</span>
<a name="l00125"></a>00125 <span class="comment"> */</span>
<a name="l00126"></a><a class="code" href="group__msg.html#ga8db9e6499b50ccdc5f7574940c4b1adf">00126</a> <span class="preprocessor">#define nlmsg_for_each_attr(pos, nlh, hdrlen, rem) \</span>
<a name="l00127"></a>00127 <span class="preprocessor">        nla_for_each_attr(pos, nlmsg_attrdata(nlh, hdrlen), \</span>
<a name="l00128"></a>00128 <span class="preprocessor">                          nlmsg_attrlen(nlh, hdrlen), rem)</span>
<a name="l00129"></a>00129 <span class="preprocessor"></span><span class="comment"></span>
<a name="l00130"></a>00130 <span class="comment">/**</span>
<a name="l00131"></a>00131 <span class="comment"> * Iterate over a stream of messages</span>
<a name="l00132"></a>00132 <span class="comment"> * @arg pos     loop counter, set to current message</span>
<a name="l00133"></a>00133 <span class="comment"> * @arg head    head of message stream</span>
<a name="l00134"></a>00134 <span class="comment"> * @arg len     length of message stream</span>
<a name="l00135"></a>00135 <span class="comment"> * @arg rem     initialized to len, holds bytes currently remaining in stream</span>
<a name="l00136"></a>00136 <span class="comment"> */</span>
<a name="l00137"></a><a class="code" href="group__msg.html#gab6cf94a06c492911e6be789ff5a3deb4">00137</a> <span class="preprocessor">#define nlmsg_for_each_msg(pos, head, len, rem) \</span>
<a name="l00138"></a>00138 <span class="preprocessor">        for (pos = head, rem = len; \</span>
<a name="l00139"></a>00139 <span class="preprocessor">             nlmsg_ok(pos, rem); \</span>
<a name="l00140"></a>00140 <span class="preprocessor">             pos = nlmsg_next(pos, &amp;(rem)))</span>
<a name="l00141"></a>00141 <span class="preprocessor"></span><span class="comment"></span>
<a name="l00142"></a>00142 <span class="comment">/** @} */</span>
<a name="l00143"></a>00143 
<a name="l00144"></a>00144 <span class="preprocessor">#ifdef __cplusplus</span>
<a name="l00145"></a>00145 <span class="preprocessor"></span>}
<a name="l00146"></a>00146 <span class="preprocessor">#endif</span>
<a name="l00147"></a>00147 <span class="preprocessor"></span>
<a name="l00148"></a>00148 <span class="preprocessor">#endif</span>
</pre></div></div>
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