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<h1>lib/fib_lookup/lookup.c</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"> * lib/fib_lookup/lookup.c FIB Lookup</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 <span class="comment"></span>
<a name="l00012"></a>00012 <span class="comment">/**</span>
<a name="l00013"></a>00013 <span class="comment"> * @ingroup nlfam</span>
<a name="l00014"></a>00014 <span class="comment"> * @defgroup fib_lookup FIB Lookup</span>
<a name="l00015"></a>00015 <span class="comment"> * @brief</span>
<a name="l00016"></a>00016 <span class="comment"> * @{</span>
<a name="l00017"></a>00017 <span class="comment"> */</span>
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="preprocessor">#include <netlink-local.h></span>
<a name="l00020"></a>00020 <span class="preprocessor">#include <netlink/netlink.h></span>
<a name="l00021"></a>00021 <span class="preprocessor">#include <netlink/attr.h></span>
<a name="l00022"></a>00022 <span class="preprocessor">#include <netlink/utils.h></span>
<a name="l00023"></a>00023 <span class="preprocessor">#include <netlink/object.h></span>
<a name="l00024"></a>00024 <span class="preprocessor">#include <netlink/route/rtnl.h></span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <netlink/route/route.h></span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <netlink/fib_lookup/request.h></span>
<a name="l00027"></a>00027 <span class="preprocessor">#include <netlink/fib_lookup/lookup.h></span>
<a name="l00028"></a>00028 <span class="comment"></span>
<a name="l00029"></a>00029 <span class="comment">/** @cond SKIP */</span>
<a name="l00030"></a>00030 <span class="keyword">static</span> <span class="keyword">struct </span><a class="code" href="structnl__cache__ops.html" title="Cache Operations.">nl_cache_ops</a> fib_lookup_ops;
<a name="l00031"></a>00031 <span class="keyword">static</span> <span class="keyword">struct </span><a class="code" href="structnl__object__ops.html" title="Object Operations.">nl_object_ops</a> result_obj_ops;
<a name="l00032"></a>00032
<a name="l00033"></a>00033 <span class="comment">/* not exported so far */</span>
<a name="l00034"></a>00034 <span class="keyword">struct </span>fib_result_nl {
<a name="l00035"></a>00035 uint32_t fl_addr; <span class="comment">/* To be looked up*/</span>
<a name="l00036"></a>00036 uint32_t fl_fwmark;
<a name="l00037"></a>00037 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> fl_tos;
<a name="l00038"></a>00038 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> fl_scope;
<a name="l00039"></a>00039 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> tb_id_in;
<a name="l00040"></a>00040
<a name="l00041"></a>00041 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> tb_id; <span class="comment">/* Results */</span>
<a name="l00042"></a>00042 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> prefixlen;
<a name="l00043"></a>00043 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> nh_sel;
<a name="l00044"></a>00044 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> type;
<a name="l00045"></a>00045 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> scope;
<a name="l00046"></a>00046 <span class="keywordtype">int</span> err;
<a name="l00047"></a>00047 };<span class="comment"></span>
<a name="l00048"></a>00048 <span class="comment">/** @endcond */</span>
<a name="l00049"></a>00049
<a name="l00050"></a>00050 <span class="keyword">static</span> <span class="keywordtype">void</span> result_free_data(<span class="keyword">struct</span> nl_object *obj)
<a name="l00051"></a>00051 {
<a name="l00052"></a>00052 <span class="keyword">struct </span>flnl_result *res = nl_object_priv(obj);
<a name="l00053"></a>00053
<a name="l00054"></a>00054 <span class="keywordflow">if</span> (res && res->fr_req)
<a name="l00055"></a>00055 <a class="code" href="group__object.html#ga9905da094bf4c03cf4ac78aeaa86a12b" title="Release a reference from an object.">nl_object_put</a>(OBJ_CAST(res->fr_req));
<a name="l00056"></a>00056 }
<a name="l00057"></a>00057
<a name="l00058"></a>00058 <span class="keyword">static</span> <span class="keywordtype">int</span> result_clone(<span class="keyword">struct</span> nl_object *_dst, <span class="keyword">struct</span> nl_object *_src)
<a name="l00059"></a>00059 {
<a name="l00060"></a>00060 <span class="keyword">struct </span>flnl_result *dst = nl_object_priv(_dst);
<a name="l00061"></a>00061 <span class="keyword">struct </span>flnl_result *src = nl_object_priv(_src);
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <span class="keywordflow">if</span> (src->fr_req)
<a name="l00064"></a>00064 <span class="keywordflow">if</span> (!(dst->fr_req = (<span class="keyword">struct</span> flnl_request *)
<a name="l00065"></a>00065 <a class="code" href="group__object.html#ga90d86d45c53d2be6ba927bec662159d7" title="Allocate a new object and copy all data from an existing object.">nl_object_clone</a>(OBJ_CAST(src->fr_req))))
<a name="l00066"></a>00066 <span class="keywordflow">return</span> nl_get_errno();
<a name="l00067"></a>00067
<a name="l00068"></a>00068 <span class="keywordflow">return</span> 0;
<a name="l00069"></a>00069 }
<a name="l00070"></a>00070
<a name="l00071"></a>00071 <span class="keyword">static</span> <span class="keywordtype">int</span> result_msg_parser(<span class="keyword">struct</span> <a class="code" href="structnl__cache__ops.html" title="Cache Operations.">nl_cache_ops</a> *ops, <span class="keyword">struct</span> <a class="code" href="structsockaddr__nl.html" title="Netlink socket address.">sockaddr_nl</a> *who,
<a name="l00072"></a>00072 <span class="keyword">struct</span> <a class="code" href="structnlmsghdr.html" title="Netlink message header.">nlmsghdr</a> *n, <span class="keyword">struct</span> <a class="code" href="structnl__parser__param.html">nl_parser_param</a> *pp)
<a name="l00073"></a>00073 {
<a name="l00074"></a>00074 <span class="keyword">struct </span>flnl_result *res;
<a name="l00075"></a>00075 <span class="keyword">struct </span>fib_result_nl *fr;
<a name="l00076"></a>00076 <span class="keyword">struct </span>nl_addr *addr;
<a name="l00077"></a>00077 <span class="keywordtype">int</span> err = -EINVAL;
<a name="l00078"></a>00078
<a name="l00079"></a>00079 res = flnl_result_alloc();
<a name="l00080"></a>00080 <span class="keywordflow">if</span> (!res)
<a name="l00081"></a>00081 <span class="keywordflow">goto</span> errout;
<a name="l00082"></a>00082
<a name="l00083"></a>00083 res->ce_msgtype = n-><a class="code" href="structnlmsghdr.html#a7232c4e6cb513010e64887b7eebf8823" title="Message type (content type)">nlmsg_type</a>;
<a name="l00084"></a>00084
<a name="l00085"></a>00085 res->fr_req = flnl_request_alloc();
<a name="l00086"></a>00086 <span class="keywordflow">if</span> (!res->fr_req)
<a name="l00087"></a>00087 <span class="keywordflow">goto</span> errout;
<a name="l00088"></a>00088
<a name="l00089"></a>00089 fr = <a class="code" href="group__msg.html#gae44a904bb40c8b5f5ff31539c21cfa5a" title="head of message payload">nlmsg_data</a>(n);
<a name="l00090"></a>00090 addr = <a class="code" href="group__addr.html#ga3ba58249a980740157be8a4fca3635fd" title="Allocate new abstract address object based on a binary address.">nl_addr_build</a>(AF_INET, &fr->fl_addr, 4);
<a name="l00091"></a>00091 <span class="keywordflow">if</span> (!addr)
<a name="l00092"></a>00092 <span class="keywordflow">goto</span> errout;
<a name="l00093"></a>00093 err = flnl_request_set_addr(res->fr_req, addr);
<a name="l00094"></a>00094 nl_addr_put(addr);
<a name="l00095"></a>00095 <span class="keywordflow">if</span> (err < 0)
<a name="l00096"></a>00096 <span class="keywordflow">goto</span> errout;
<a name="l00097"></a>00097
<a name="l00098"></a>00098 flnl_request_set_fwmark(res->fr_req, fr->fl_fwmark);
<a name="l00099"></a>00099 flnl_request_set_tos(res->fr_req, fr->fl_tos);
<a name="l00100"></a>00100 flnl_request_set_scope(res->fr_req, fr->fl_scope);
<a name="l00101"></a>00101 flnl_request_set_table(res->fr_req, fr->tb_id_in);
<a name="l00102"></a>00102
<a name="l00103"></a>00103 res->fr_table_id = fr->tb_id;
<a name="l00104"></a>00104 res->fr_prefixlen = fr->prefixlen;
<a name="l00105"></a>00105 res->fr_nh_sel = fr->nh_sel;
<a name="l00106"></a>00106 res->fr_type = fr->type;
<a name="l00107"></a>00107 res->fr_scope = fr->scope;
<a name="l00108"></a>00108 res->fr_error = fr->err;
<a name="l00109"></a>00109
<a name="l00110"></a>00110 err = pp->pp_cb((<span class="keyword">struct</span> nl_object *) res, pp);
<a name="l00111"></a>00111 <span class="keywordflow">if</span> (err < 0)
<a name="l00112"></a>00112 <span class="keywordflow">goto</span> errout;
<a name="l00113"></a>00113
<a name="l00114"></a>00114 <span class="comment">/* REAL HACK, fib_lookup doesn't support ACK nor does it</span>
<a name="l00115"></a>00115 <span class="comment"> * send a DONE message, enforce end of message stream</span>
<a name="l00116"></a>00116 <span class="comment"> * after just the first message */</span>
<a name="l00117"></a>00117 err = <a class="code" href="group__cb.html#gga0c50cb29c507b3d7e8bc7d76c74675f8aa87c4bfa1b41e2e06286a412dc2bc17b" title="Stop parsing altogether and discard remaining messages.">NL_STOP</a>;
<a name="l00118"></a>00118
<a name="l00119"></a>00119 errout:
<a name="l00120"></a>00120 flnl_result_put(res);
<a name="l00121"></a>00121 <span class="keywordflow">return</span> err;
<a name="l00122"></a>00122 }
<a name="l00123"></a>00123
<a name="l00124"></a>00124 <span class="keyword">static</span> <span class="keywordtype">int</span> result_dump_brief(<span class="keyword">struct</span> nl_object *obj, <span class="keyword">struct</span> <a class="code" href="structnl__dump__params.html" title="Dumping parameters.">nl_dump_params</a> *p)
<a name="l00125"></a>00125 {
<a name="l00126"></a>00126 <span class="keyword">struct </span>flnl_result *res = (<span class="keyword">struct </span>flnl_result *) obj;
<a name="l00127"></a>00127 <span class="keywordtype">char</span> buf[128];
<a name="l00128"></a>00128 <span class="keywordtype">int</span> line = 1;
<a name="l00129"></a>00129
<a name="l00130"></a>00130 dp_dump(p, <span class="stringliteral">"table %s prefixlen %u next-hop-selector %u\n"</span>,
<a name="l00131"></a>00131 rtnl_route_table2str(res->fr_table_id, buf, <span class="keyword">sizeof</span>(buf)),
<a name="l00132"></a>00132 res->fr_prefixlen, res->fr_nh_sel);
<a name="l00133"></a>00133 dp_dump_line(p, line++, <span class="stringliteral">"type %s "</span>,
<a name="l00134"></a>00134 nl_rtntype2str(res->fr_type, buf, <span class="keyword">sizeof</span>(buf)));
<a name="l00135"></a>00135 dp_dump(p, <span class="stringliteral">"scope %s error %s (%d)\n"</span>,
<a name="l00136"></a>00136 rtnl_scope2str(res->fr_scope, buf, <span class="keyword">sizeof</span>(buf)),
<a name="l00137"></a>00137 strerror(-res->fr_error), res->fr_error);
<a name="l00138"></a>00138
<a name="l00139"></a>00139 <span class="keywordflow">return</span> line;
<a name="l00140"></a>00140 }
<a name="l00141"></a>00141
<a name="l00142"></a>00142 <span class="keyword">static</span> <span class="keywordtype">int</span> result_dump_full(<span class="keyword">struct</span> nl_object *obj, <span class="keyword">struct</span> <a class="code" href="structnl__dump__params.html" title="Dumping parameters.">nl_dump_params</a> *p)
<a name="l00143"></a>00143 {
<a name="l00144"></a>00144 <span class="keywordflow">return</span> result_dump_brief(obj, p);
<a name="l00145"></a>00145 }
<a name="l00146"></a>00146
<a name="l00147"></a>00147 <span class="keyword">static</span> <span class="keywordtype">int</span> result_compare(<span class="keyword">struct</span> nl_object *_a, <span class="keyword">struct</span> nl_object *_b,
<a name="l00148"></a>00148 uint32_t attrs, <span class="keywordtype">int</span> flags)
<a name="l00149"></a>00149 {
<a name="l00150"></a>00150 <span class="keywordflow">return</span> 0;
<a name="l00151"></a>00151 }
<a name="l00152"></a>00152 <span class="comment"></span>
<a name="l00153"></a>00153 <span class="comment">/**</span>
<a name="l00154"></a>00154 <span class="comment"> * @name Allocation/Freeing</span>
<a name="l00155"></a>00155 <span class="comment"> * @{</span>
<a name="l00156"></a>00156 <span class="comment"> */</span>
<a name="l00157"></a>00157
<a name="l00158"></a>00158 <span class="keyword">struct </span>flnl_result *flnl_result_alloc(<span class="keywordtype">void</span>)
<a name="l00159"></a>00159 {
<a name="l00160"></a>00160 <span class="keywordflow">return</span> (<span class="keyword">struct</span> flnl_result *) <a class="code" href="group__object.html#ga9c1f2fd887d8325839f452879cdf982a" title="Allocate a new object of kind specified by the operations handle.">nl_object_alloc</a>(&result_obj_ops);
<a name="l00161"></a>00161 }
<a name="l00162"></a>00162
<a name="l00163"></a>00163 <span class="keywordtype">void</span> flnl_result_put(<span class="keyword">struct</span> flnl_result *res)
<a name="l00164"></a>00164 {
<a name="l00165"></a>00165 <a class="code" href="group__object.html#ga9905da094bf4c03cf4ac78aeaa86a12b" title="Release a reference from an object.">nl_object_put</a>((<span class="keyword">struct</span> nl_object *) res);
<a name="l00166"></a>00166 }
<a name="l00167"></a>00167 <span class="comment"></span>
<a name="l00168"></a>00168 <span class="comment">/** @} */</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"> * @name Cache Management</span>
<a name="l00172"></a>00172 <span class="comment"> * @{</span>
<a name="l00173"></a>00173 <span class="comment"> */</span>
<a name="l00174"></a>00174 <span class="comment"></span>
<a name="l00175"></a>00175 <span class="comment">/**</span>
<a name="l00176"></a>00176 <span class="comment"> * Allocate lookup result cache.</span>
<a name="l00177"></a>00177 <span class="comment"> *</span>
<a name="l00178"></a>00178 <span class="comment"> * Allocates a new lookup result cache and initializes it properly.</span>
<a name="l00179"></a>00179 <span class="comment"> *</span>
<a name="l00180"></a>00180 <span class="comment"> * @note Free the memory after usage using nl_cache_destroy_and_free().</span>
<a name="l00181"></a>00181 <span class="comment"> * @return Newly allocated cache or NULL if an error occured.</span>
<a name="l00182"></a>00182 <span class="comment"> */</span>
<a name="l00183"></a><a class="code" href="group__fib__lookup.html#ga5ab311aae5e0e2497167f34d326bfc8b">00183</a> <span class="keyword">struct </span>nl_cache *<a class="code" href="group__fib__lookup.html#ga5ab311aae5e0e2497167f34d326bfc8b" title="Allocate lookup result cache.">flnl_result_alloc_cache</a>(<span class="keywordtype">void</span>)
<a name="l00184"></a>00184 {
<a name="l00185"></a>00185 <span class="keywordflow">return</span> <a class="code" href="group__cache.html#ga9520ae0f2158db3c081f34c851d92252" title="Allocate an empty cache.">nl_cache_alloc</a>(&fib_lookup_ops);
<a name="l00186"></a>00186 }
<a name="l00187"></a>00187 <span class="comment"></span>
<a name="l00188"></a>00188 <span class="comment">/** @} */</span>
<a name="l00189"></a>00189 <span class="comment"></span>
<a name="l00190"></a>00190 <span class="comment">/**</span>
<a name="l00191"></a>00191 <span class="comment"> * @name Lookup</span>
<a name="l00192"></a>00192 <span class="comment"> * @{</span>
<a name="l00193"></a>00193 <span class="comment"> */</span>
<a name="l00194"></a>00194 <span class="comment"></span>
<a name="l00195"></a>00195 <span class="comment">/**</span>
<a name="l00196"></a>00196 <span class="comment"> * Builds a netlink request message to do a lookup</span>
<a name="l00197"></a>00197 <span class="comment"> * @arg req Requested match.</span>
<a name="l00198"></a>00198 <span class="comment"> * @arg flags additional netlink message flags</span>
<a name="l00199"></a>00199 <span class="comment"> *</span>
<a name="l00200"></a>00200 <span class="comment"> * Builds a new netlink message requesting a change of link attributes.</span>
<a name="l00201"></a>00201 <span class="comment"> * The netlink message header isn't fully equipped with all relevant</span>
<a name="l00202"></a>00202 <span class="comment"> * fields and must be sent out via nl_send_auto_complete() or</span>
<a name="l00203"></a>00203 <span class="comment"> * supplemented as needed.</span>
<a name="l00204"></a>00204 <span class="comment"> * \a old must point to a link currently configured in the kernel</span>
<a name="l00205"></a>00205 <span class="comment"> * and \a tmpl must contain the attributes to be changed set via</span>
<a name="l00206"></a>00206 <span class="comment"> * \c rtnl_link_set_* functions.</span>
<a name="l00207"></a>00207 <span class="comment"> *</span>
<a name="l00208"></a>00208 <span class="comment"> * @return New netlink message</span>
<a name="l00209"></a>00209 <span class="comment"> * @note Not all attributes can be changed, see</span>
<a name="l00210"></a>00210 <span class="comment"> * \ref link_changeable "Changeable Attributes" for more details.</span>
<a name="l00211"></a>00211 <span class="comment"> */</span>
<a name="l00212"></a><a class="code" href="group__fib__lookup.html#ga82fd5afaecd398c3a5245daa1423c46e">00212</a> <span class="keyword">struct </span>nl_msg *<a class="code" href="group__fib__lookup.html#ga82fd5afaecd398c3a5245daa1423c46e" title="Builds a netlink request message to do a lookup.">flnl_lookup_build_request</a>(<span class="keyword">struct</span> flnl_request *req, <span class="keywordtype">int</span> flags)
<a name="l00213"></a>00213 {
<a name="l00214"></a>00214 <span class="keyword">struct </span>nl_msg *msg;
<a name="l00215"></a>00215 <span class="keyword">struct </span>nl_addr *addr;
<a name="l00216"></a>00216 uint64_t fwmark;
<a name="l00217"></a>00217 <span class="keywordtype">int</span> tos, scope, table;
<a name="l00218"></a>00218 <span class="keyword">struct </span>fib_result_nl fr = {0};
<a name="l00219"></a>00219
<a name="l00220"></a>00220 fwmark = flnl_request_get_fwmark(req);
<a name="l00221"></a>00221 tos = flnl_request_get_tos(req);
<a name="l00222"></a>00222 scope = flnl_request_get_scope(req);
<a name="l00223"></a>00223 table = flnl_request_get_table(req);
<a name="l00224"></a>00224
<a name="l00225"></a>00225 fr.fl_fwmark = fwmark != UINT_LEAST64_MAX ? fwmark : 0;
<a name="l00226"></a>00226 fr.fl_tos = tos >= 0 ? tos : 0;
<a name="l00227"></a>00227 fr.fl_scope = scope >= 0 ? scope : RT_SCOPE_UNIVERSE;
<a name="l00228"></a>00228 fr.tb_id_in = table >= 0 ? table : RT_TABLE_UNSPEC;
<a name="l00229"></a>00229
<a name="l00230"></a>00230 addr = flnl_request_get_addr(req);
<a name="l00231"></a>00231 <span class="keywordflow">if</span> (!addr) {
<a name="l00232"></a>00232 nl_error(EINVAL, <span class="stringliteral">"Request must specify the address"</span>);
<a name="l00233"></a>00233 <span class="keywordflow">return</span> NULL;
<a name="l00234"></a>00234 }
<a name="l00235"></a>00235
<a name="l00236"></a>00236 fr.fl_addr = *(uint32_t *) <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="l00237"></a>00237
<a name="l00238"></a>00238 msg = <a class="code" href="group__msg.html#ga580d8697d19050c55060bc10ab4eae9f" title="Allocate a new netlink message.">nlmsg_alloc_simple</a>(0, flags);
<a name="l00239"></a>00239 <span class="keywordflow">if</span> (!msg)
<a name="l00240"></a>00240 <span class="keywordflow">goto</span> errout;
<a name="l00241"></a>00241
<a name="l00242"></a>00242 <span class="keywordflow">if</span> (<a class="code" href="group__msg.html#gacc5e5ade5675d041f86c7c8693f7088d" title="Append data to tail of a netlink message.">nlmsg_append</a>(msg, &fr, <span class="keyword">sizeof</span>(fr), NLMSG_ALIGNTO) < 0)
<a name="l00243"></a>00243 <span class="keywordflow">goto</span> errout;
<a name="l00244"></a>00244
<a name="l00245"></a>00245 <span class="keywordflow">return</span> msg;
<a name="l00246"></a>00246
<a name="l00247"></a>00247 errout:
<a name="l00248"></a>00248 <a class="code" href="group__msg.html#ga138ba9bee70553f9fbe7143deacad48c" title="Free a netlink message.">nlmsg_free</a>(msg);
<a name="l00249"></a>00249 <span class="keywordflow">return</span> NULL;
<a name="l00250"></a>00250 }
<a name="l00251"></a>00251 <span class="comment"></span>
<a name="l00252"></a>00252 <span class="comment">/**</span>
<a name="l00253"></a>00253 <span class="comment"> * Perform FIB Lookup</span>
<a name="l00254"></a>00254 <span class="comment"> * @arg handle Netlink handle.</span>
<a name="l00255"></a>00255 <span class="comment"> * @arg req Lookup request object.</span>
<a name="l00256"></a>00256 <span class="comment"> * @arg cache Cache for result.</span>
<a name="l00257"></a>00257 <span class="comment"> *</span>
<a name="l00258"></a>00258 <span class="comment"> * Builds a netlink message to request a FIB lookup, waits for the</span>
<a name="l00259"></a>00259 <span class="comment"> * reply and adds the result to the specified cache.</span>
<a name="l00260"></a>00260 <span class="comment"> *</span>
<a name="l00261"></a>00261 <span class="comment"> * @return 0 on success or a negative error code.</span>
<a name="l00262"></a>00262 <span class="comment"> */</span>
<a name="l00263"></a><a class="code" href="group__fib__lookup.html#ga3d4a00b94f50e5d6d1cea6c756a43b5a">00263</a> <span class="keywordtype">int</span> <a class="code" href="group__fib__lookup.html#ga3d4a00b94f50e5d6d1cea6c756a43b5a" title="Perform FIB Lookup.">flnl_lookup</a>(<span class="keyword">struct</span> nl_handle *handle, <span class="keyword">struct</span> flnl_request *req,
<a name="l00264"></a>00264 <span class="keyword">struct</span> nl_cache *cache)
<a name="l00265"></a>00265 {
<a name="l00266"></a>00266 <span class="keyword">struct </span>nl_msg *msg;
<a name="l00267"></a>00267 <span class="keywordtype">int</span> err;
<a name="l00268"></a>00268
<a name="l00269"></a>00269 msg = <a class="code" href="group__fib__lookup.html#ga82fd5afaecd398c3a5245daa1423c46e" title="Builds a netlink request message to do a lookup.">flnl_lookup_build_request</a>(req, 0);
<a name="l00270"></a>00270 <span class="keywordflow">if</span> (!msg)
<a name="l00271"></a>00271 <span class="keywordflow">return</span> nl_errno(ENOMEM);
<a name="l00272"></a>00272
<a name="l00273"></a>00273 err = <a class="code" href="group__nl.html#ga01a2aad82350f867e704d5c696438b60" title="Send netlink message and check &amp; extend header values as needed.">nl_send_auto_complete</a>(handle, msg);
<a name="l00274"></a>00274 <a class="code" href="group__msg.html#ga138ba9bee70553f9fbe7143deacad48c" title="Free a netlink message.">nlmsg_free</a>(msg);
<a name="l00275"></a>00275 <span class="keywordflow">if</span> (err < 0)
<a name="l00276"></a>00276 <span class="keywordflow">return</span> err;
<a name="l00277"></a>00277
<a name="l00278"></a>00278 <span class="keywordflow">return</span> <a class="code" href="group__cache.html#gae9ee72b56b5d3e215403105c858b9479" title="Pickup a netlink dump response and put it into a cache.">nl_cache_pickup</a>(handle, cache);
<a name="l00279"></a>00279 }
<a name="l00280"></a>00280 <span class="comment"></span>
<a name="l00281"></a>00281 <span class="comment">/** @} */</span>
<a name="l00282"></a>00282 <span class="comment"></span>
<a name="l00283"></a>00283 <span class="comment">/**</span>
<a name="l00284"></a>00284 <span class="comment"> * @name Attribute Access</span>
<a name="l00285"></a>00285 <span class="comment"> * @{</span>
<a name="l00286"></a>00286 <span class="comment"> */</span>
<a name="l00287"></a>00287
<a name="l00288"></a>00288 <span class="keywordtype">int</span> flnl_result_get_table_id(<span class="keyword">struct</span> flnl_result *res)
<a name="l00289"></a>00289 {
<a name="l00290"></a>00290 <span class="keywordflow">return</span> res->fr_table_id;
<a name="l00291"></a>00291 }
<a name="l00292"></a>00292
<a name="l00293"></a>00293 <span class="keywordtype">int</span> flnl_result_get_prefixlen(<span class="keyword">struct</span> flnl_result *res)
<a name="l00294"></a>00294 {
<a name="l00295"></a>00295 <span class="keywordflow">return</span> res->fr_prefixlen;
<a name="l00296"></a>00296 }
<a name="l00297"></a>00297
<a name="l00298"></a>00298 <span class="keywordtype">int</span> flnl_result_get_nexthop_sel(<span class="keyword">struct</span> flnl_result *res)
<a name="l00299"></a>00299 {
<a name="l00300"></a>00300 <span class="keywordflow">return</span> res->fr_nh_sel;
<a name="l00301"></a>00301 }
<a name="l00302"></a>00302
<a name="l00303"></a>00303 <span class="keywordtype">int</span> flnl_result_get_type(<span class="keyword">struct</span> flnl_result *res)
<a name="l00304"></a>00304 {
<a name="l00305"></a>00305 <span class="keywordflow">return</span> res->fr_type;
<a name="l00306"></a>00306 }
<a name="l00307"></a>00307
<a name="l00308"></a>00308 <span class="keywordtype">int</span> flnl_result_get_scope(<span class="keyword">struct</span> flnl_result *res)
<a name="l00309"></a>00309 {
<a name="l00310"></a>00310 <span class="keywordflow">return</span> res->fr_scope;
<a name="l00311"></a>00311 }
<a name="l00312"></a>00312
<a name="l00313"></a>00313 <span class="keywordtype">int</span> flnl_result_get_error(<span class="keyword">struct</span> flnl_result *res)
<a name="l00314"></a>00314 {
<a name="l00315"></a>00315 <span class="keywordflow">return</span> res->fr_error;
<a name="l00316"></a>00316 }
<a name="l00317"></a>00317 <span class="comment"></span>
<a name="l00318"></a>00318 <span class="comment">/** @} */</span>
<a name="l00319"></a>00319
<a name="l00320"></a>00320 <span class="keyword">static</span> <span class="keyword">struct </span><a class="code" href="structnl__object__ops.html" title="Object Operations.">nl_object_ops</a> result_obj_ops = {
<a name="l00321"></a>00321 .<a class="code" href="structnl__object__ops.html#a5225584343fe711642303e000b036ee9" title="Unique name of object type.">oo_name</a> = <span class="stringliteral">"fib_lookup/result"</span>,
<a name="l00322"></a>00322 .oo_size = <span class="keyword">sizeof</span>(<span class="keyword">struct </span>flnl_result),
<a name="l00323"></a>00323 .oo_free_data = result_free_data,
<a name="l00324"></a>00324 .oo_clone = result_clone,
<a name="l00325"></a>00325 .oo_dump[<a class="code" href="group__utils.html#ggacfb5566c73f0965c5241d7d49bc717e9a5597887c080d5ecae358b6065a4048fd" title="Dump object in a brief one-liner.">NL_DUMP_BRIEF</a>] = result_dump_brief,
<a name="l00326"></a>00326 .oo_dump[<a class="code" href="group__utils.html#ggacfb5566c73f0965c5241d7d49bc717e9a1445106c7af529b2c99ee289fbcd3179" title="Dump all attributes but no statistics.">NL_DUMP_FULL</a>] = result_dump_full,
<a name="l00327"></a>00327 .oo_compare = result_compare,
<a name="l00328"></a>00328 };
<a name="l00329"></a>00329
<a name="l00330"></a>00330 <span class="keyword">static</span> <span class="keyword">struct </span><a class="code" href="structnl__cache__ops.html" title="Cache Operations.">nl_cache_ops</a> fib_lookup_ops = {
<a name="l00331"></a>00331 .co_name = <span class="stringliteral">"fib_lookup/fib_lookup"</span>,
<a name="l00332"></a>00332 .co_hdrsize = <span class="keyword">sizeof</span>(<span class="keyword">struct </span>fib_result_nl),
<a name="l00333"></a>00333 .co_msgtypes = {
<a name="l00334"></a>00334 { 0, NL_ACT_UNSPEC, <span class="stringliteral">"any"</span> },
<a name="l00335"></a>00335 END_OF_MSGTYPES_LIST,
<a name="l00336"></a>00336 },
<a name="l00337"></a>00337 .co_protocol = NETLINK_FIB_LOOKUP,
<a name="l00338"></a>00338 .co_msg_parser = result_msg_parser,
<a name="l00339"></a>00339 .co_obj_ops = &result_obj_ops,
<a name="l00340"></a>00340 };
<a name="l00341"></a>00341
<a name="l00342"></a>00342 <span class="keyword">static</span> <span class="keywordtype">void</span> __init fib_lookup_init(<span class="keywordtype">void</span>)
<a name="l00343"></a>00343 {
<a name="l00344"></a>00344 <a class="code" href="group__cache__mngt.html#ga390eeb1fa61634cf1c216792c6df63c3" title="Register a set of cache operations.">nl_cache_mngt_register</a>(&fib_lookup_ops);
<a name="l00345"></a>00345 }
<a name="l00346"></a>00346
<a name="l00347"></a>00347 <span class="keyword">static</span> <span class="keywordtype">void</span> __exit fib_lookup_exit(<span class="keywordtype">void</span>)
<a name="l00348"></a>00348 {
<a name="l00349"></a>00349 <a class="code" href="group__cache__mngt.html#ga09f56b767b3868b7e0cf8559863dde77" title="Unregister a set of cache operations.">nl_cache_mngt_unregister</a>(&fib_lookup_ops);
<a name="l00350"></a>00350 }
<a name="l00351"></a>00351 <span class="comment"></span>
<a name="l00352"></a>00352 <span class="comment">/** @} */</span>
</pre></div></div>
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