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<h1>lib/route/route.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/route/route.c Routes</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 rtnl</span>
<a name="l00014"></a>00014 <span class="comment"> * @defgroup route Routing</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/cache.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/data.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/route/link.h></span>
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <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> rtnl_route_ops;
<a name="l00029"></a>00029
<a name="l00030"></a>00030 <span class="keyword">static</span> <span class="keyword">struct </span><a class="code" href="structnla__policy.html" title="attribute validation policy">nla_policy</a> route_policy[RTA_MAX+1] = {
<a name="l00031"></a>00031 [RTA_IIF] = { .<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="l00032"></a>00032 .maxlen = IFNAMSIZ, },
<a name="l00033"></a>00033 [RTA_OIF] = { .type = <a class="code" href="group__attr.html#gga06fc87d81c62e9abb8790b6e5713c55babddb836025b456b06b025c293bff6dc8" title="32bit integer">NLA_U32</a> },
<a name="l00034"></a>00034 [RTA_PRIORITY] = { .type = <a class="code" href="group__attr.html#gga06fc87d81c62e9abb8790b6e5713c55babddb836025b456b06b025c293bff6dc8" title="32bit integer">NLA_U32</a> },
<a name="l00035"></a>00035 [RTA_FLOW] = { .type = <a class="code" href="group__attr.html#gga06fc87d81c62e9abb8790b6e5713c55babddb836025b456b06b025c293bff6dc8" title="32bit integer">NLA_U32</a> },
<a name="l00036"></a>00036 [RTA_MP_ALGO] = { .type = <a class="code" href="group__attr.html#gga06fc87d81c62e9abb8790b6e5713c55babddb836025b456b06b025c293bff6dc8" title="32bit integer">NLA_U32</a> },
<a name="l00037"></a>00037 [RTA_CACHEINFO] = { .minlen = <span class="keyword">sizeof</span>(<span class="keyword">struct </span>rta_cacheinfo) },
<a name="l00038"></a>00038 [RTA_METRICS] = { .type = <a class="code" href="group__attr.html#gga06fc87d81c62e9abb8790b6e5713c55ba925c06a260a9ffaef80ee4aa13738e19" title="nested attributes">NLA_NESTED</a> },
<a name="l00039"></a>00039 [RTA_MULTIPATH] = { .type = <a class="code" href="group__attr.html#gga06fc87d81c62e9abb8790b6e5713c55ba925c06a260a9ffaef80ee4aa13738e19" title="nested attributes">NLA_NESTED</a> },
<a name="l00040"></a>00040 };
<a name="l00041"></a>00041
<a name="l00042"></a>00042 <span class="keyword">static</span> <span class="keywordtype">void</span> copy_cacheinfo_into_route(<span class="keyword">struct</span> rta_cacheinfo *ci,
<a name="l00043"></a>00043 <span class="keyword">struct</span> rtnl_route *route)
<a name="l00044"></a>00044 {
<a name="l00045"></a>00045 <span class="keyword">struct </span><a class="code" href="structrtnl__rtcacheinfo.html">rtnl_rtcacheinfo</a> nci = {
<a name="l00046"></a>00046 .rtci_clntref = ci->rta_clntref,
<a name="l00047"></a>00047 .rtci_last_use = ci->rta_lastuse,
<a name="l00048"></a>00048 .rtci_expires = ci->rta_expires,
<a name="l00049"></a>00049 .rtci_error = ci->rta_error,
<a name="l00050"></a>00050 .rtci_used = ci->rta_used,
<a name="l00051"></a>00051 .rtci_id = ci->rta_id,
<a name="l00052"></a>00052 .rtci_ts = ci->rta_ts,
<a name="l00053"></a>00053 .rtci_tsage = ci->rta_tsage,
<a name="l00054"></a>00054 };
<a name="l00055"></a>00055
<a name="l00056"></a>00056 rtnl_route_set_cacheinfo(route, &nci);
<a name="l00057"></a>00057 }
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="keyword">static</span> <span class="keywordtype">int</span> route_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="l00060"></a>00060 <span class="keyword">struct</span> <a class="code" href="structnlmsghdr.html" title="Netlink message header.">nlmsghdr</a> *nlh, <span class="keyword">struct</span> <a class="code" href="structnl__parser__param.html">nl_parser_param</a> *pp)
<a name="l00061"></a>00061 {
<a name="l00062"></a>00062 <span class="keyword">struct </span>rtmsg *rtm;
<a name="l00063"></a>00063 <span class="keyword">struct </span>rtnl_route *route;
<a name="l00064"></a>00064 <span class="keyword">struct </span>nlattr *tb[RTA_MAX + 1];
<a name="l00065"></a>00065 <span class="keyword">struct </span>nl_addr *src = NULL, *dst = NULL, *addr;
<a name="l00066"></a>00066 <span class="keywordtype">int</span> err;
<a name="l00067"></a>00067
<a name="l00068"></a>00068 route = rtnl_route_alloc();
<a name="l00069"></a>00069 <span class="keywordflow">if</span> (!route) {
<a name="l00070"></a>00070 err = nl_errno(ENOMEM);
<a name="l00071"></a>00071 <span class="keywordflow">goto</span> errout;
<a name="l00072"></a>00072 }
<a name="l00073"></a>00073
<a name="l00074"></a>00074 route->ce_msgtype = nlh-><a class="code" href="structnlmsghdr.html#a7232c4e6cb513010e64887b7eebf8823" title="Message type (content type)">nlmsg_type</a>;
<a name="l00075"></a>00075
<a name="l00076"></a>00076 err = <a class="code" href="group__msg.html#ga2671eefe95c3e44dec8ddab51ae57593" title="parse attributes of a netlink message">nlmsg_parse</a>(nlh, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> rtmsg), tb, RTA_MAX,
<a name="l00077"></a>00077 route_policy);
<a name="l00078"></a>00078 <span class="keywordflow">if</span> (err < 0)
<a name="l00079"></a>00079 <span class="keywordflow">goto</span> errout;
<a name="l00080"></a>00080
<a name="l00081"></a>00081 rtm = <a class="code" href="group__msg.html#gae44a904bb40c8b5f5ff31539c21cfa5a" title="head of message payload">nlmsg_data</a>(nlh);
<a name="l00082"></a>00082 rtnl_route_set_family(route, rtm->rtm_family);
<a name="l00083"></a>00083 rtnl_route_set_tos(route, rtm->rtm_tos);
<a name="l00084"></a>00084 rtnl_route_set_table(route, rtm->rtm_table);
<a name="l00085"></a>00085 rtnl_route_set_type(route, rtm->rtm_type);
<a name="l00086"></a>00086 rtnl_route_set_scope(route, rtm->rtm_scope);
<a name="l00087"></a>00087 rtnl_route_set_protocol(route, rtm->rtm_protocol);
<a name="l00088"></a>00088 rtnl_route_set_flags(route, rtm->rtm_flags);
<a name="l00089"></a>00089
<a name="l00090"></a>00090 <span class="keywordflow">if</span> (tb[RTA_DST]) {
<a name="l00091"></a>00091 dst = <a class="code" href="group__attr.html#ga98a5ac1eefea9266cf46c91b9a9867f3" title="Return payload of address attribute.">nla_get_addr</a>(tb[RTA_DST], rtm->rtm_family);
<a name="l00092"></a>00092 <span class="keywordflow">if</span> (dst == NULL)
<a name="l00093"></a>00093 <span class="keywordflow">goto</span> errout_errno;
<a name="l00094"></a>00094 } <span class="keywordflow">else</span> {
<a name="l00095"></a>00095 dst = <a class="code" href="group__addr.html#ga95f044c6a8065a7e909ffe214517c501" title="Allocate new abstract address object.">nl_addr_alloc</a>(0);
<a name="l00096"></a>00096 nl_addr_set_family(dst, rtm->rtm_family);
<a name="l00097"></a>00097 }
<a name="l00098"></a>00098
<a name="l00099"></a>00099 nl_addr_set_prefixlen(dst, rtm->rtm_dst_len);
<a name="l00100"></a>00100 err = rtnl_route_set_dst(route, dst);
<a name="l00101"></a>00101 <span class="keywordflow">if</span> (err < 0)
<a name="l00102"></a>00102 <span class="keywordflow">goto</span> errout;
<a name="l00103"></a>00103
<a name="l00104"></a>00104 nl_addr_put(dst);
<a name="l00105"></a>00105
<a name="l00106"></a>00106 <span class="keywordflow">if</span> (tb[RTA_SRC]) {
<a name="l00107"></a>00107 src = <a class="code" href="group__attr.html#ga98a5ac1eefea9266cf46c91b9a9867f3" title="Return payload of address attribute.">nla_get_addr</a>(tb[RTA_SRC], rtm->rtm_family);
<a name="l00108"></a>00108 <span class="keywordflow">if</span> (src == NULL)
<a name="l00109"></a>00109 <span class="keywordflow">goto</span> errout_errno;
<a name="l00110"></a>00110 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (rtm->rtm_src_len)
<a name="l00111"></a>00111 src = <a class="code" href="group__addr.html#ga95f044c6a8065a7e909ffe214517c501" title="Allocate new abstract address object.">nl_addr_alloc</a>(0);
<a name="l00112"></a>00112
<a name="l00113"></a>00113 <span class="keywordflow">if</span> (src) {
<a name="l00114"></a>00114 nl_addr_set_prefixlen(src, rtm->rtm_src_len);
<a name="l00115"></a>00115 rtnl_route_set_src(route, src);
<a name="l00116"></a>00116 nl_addr_put(src);
<a name="l00117"></a>00117 }
<a name="l00118"></a>00118
<a name="l00119"></a>00119 <span class="keywordflow">if</span> (tb[RTA_IIF])
<a name="l00120"></a>00120 rtnl_route_set_iif(route, <a class="code" href="group__attr.html#ga99baaa7c85d04eaece8f5eea34d8e2e9" title="return payload of string attribute">nla_get_string</a>(tb[RTA_IIF]));
<a name="l00121"></a>00121
<a name="l00122"></a>00122 <span class="keywordflow">if</span> (tb[RTA_OIF])
<a name="l00123"></a>00123 rtnl_route_set_oif(route, <a class="code" href="group__attr.html#gabda0290a8b26cc577c2c5cefa814aeac" title="Return payload of u32 attribute.">nla_get_u32</a>(tb[RTA_OIF]));
<a name="l00124"></a>00124
<a name="l00125"></a>00125 <span class="keywordflow">if</span> (tb[RTA_GATEWAY]) {
<a name="l00126"></a>00126 addr = <a class="code" href="group__attr.html#ga98a5ac1eefea9266cf46c91b9a9867f3" title="Return payload of address attribute.">nla_get_addr</a>(tb[RTA_GATEWAY], route->rt_family);
<a name="l00127"></a>00127 <span class="keywordflow">if</span> (addr == NULL)
<a name="l00128"></a>00128 <span class="keywordflow">goto</span> errout_errno;
<a name="l00129"></a>00129 rtnl_route_set_gateway(route, addr);
<a name="l00130"></a>00130 nl_addr_put(addr);
<a name="l00131"></a>00131 }
<a name="l00132"></a>00132
<a name="l00133"></a>00133 <span class="keywordflow">if</span> (tb[RTA_PRIORITY])
<a name="l00134"></a>00134 rtnl_route_set_prio(route, <a class="code" href="group__attr.html#gabda0290a8b26cc577c2c5cefa814aeac" title="Return payload of u32 attribute.">nla_get_u32</a>(tb[RTA_PRIORITY]));
<a name="l00135"></a>00135
<a name="l00136"></a>00136 <span class="keywordflow">if</span> (tb[RTA_PREFSRC]) {
<a name="l00137"></a>00137 addr = <a class="code" href="group__attr.html#ga98a5ac1eefea9266cf46c91b9a9867f3" title="Return payload of address attribute.">nla_get_addr</a>(tb[RTA_PREFSRC], route->rt_family);
<a name="l00138"></a>00138 <span class="keywordflow">if</span> (addr == NULL)
<a name="l00139"></a>00139 <span class="keywordflow">goto</span> errout_errno;
<a name="l00140"></a>00140 rtnl_route_set_pref_src(route, addr);
<a name="l00141"></a>00141 nl_addr_put(addr);
<a name="l00142"></a>00142 }
<a name="l00143"></a>00143
<a name="l00144"></a>00144 <span class="keywordflow">if</span> (tb[RTA_METRICS]) {
<a name="l00145"></a>00145 <span class="keyword">struct </span>nlattr *mtb[RTAX_MAX + 1];
<a name="l00146"></a>00146 <span class="keywordtype">int</span> i;
<a name="l00147"></a>00147
<a name="l00148"></a>00148 err = <a class="code" href="group__attr.html#ga974ec0720b2d863a5c65da868bcb7a6e" title="parse nested attributes">nla_parse_nested</a>(mtb, RTAX_MAX, tb[RTA_METRICS], NULL);
<a name="l00149"></a>00149 <span class="keywordflow">if</span> (err < 0)
<a name="l00150"></a>00150 <span class="keywordflow">goto</span> errout;
<a name="l00151"></a>00151
<a name="l00152"></a>00152 <span class="keywordflow">for</span> (i = 1; i <= RTAX_MAX; i++) {
<a name="l00153"></a>00153 <span class="keywordflow">if</span> (mtb[i] && <a class="code" href="group__attr.html#gac5a7705797946fa9c0775997bb8d130b" title="length of payload">nla_len</a>(mtb[i]) >= <span class="keyword">sizeof</span>(uint32_t)) {
<a name="l00154"></a>00154 uint32_t m = <a class="code" href="group__attr.html#gabda0290a8b26cc577c2c5cefa814aeac" title="Return payload of u32 attribute.">nla_get_u32</a>(mtb[i]);
<a name="l00155"></a>00155 <span class="keywordflow">if</span> (rtnl_route_set_metric(route, i, m) < 0)
<a name="l00156"></a>00156 <span class="keywordflow">goto</span> errout_errno;
<a name="l00157"></a>00157 }
<a name="l00158"></a>00158 }
<a name="l00159"></a>00159 }
<a name="l00160"></a>00160
<a name="l00161"></a>00161 <span class="keywordflow">if</span> (tb[RTA_MULTIPATH]) {
<a name="l00162"></a>00162 <span class="keyword">struct </span>rtnl_nexthop *nh;
<a name="l00163"></a>00163 <span class="keyword">struct </span>rtnexthop *rtnh = <a class="code" href="group__attr.html#gaf39d6bbd2be1fc2de30b6b7d079a5fce" title="head of payload">nla_data</a>(tb[RTA_MULTIPATH]);
<a name="l00164"></a>00164 <span class="keywordtype">size_t</span> tlen = <a class="code" href="group__attr.html#gac5a7705797946fa9c0775997bb8d130b" title="length of payload">nla_len</a>(tb[RTA_MULTIPATH]);
<a name="l00165"></a>00165
<a name="l00166"></a>00166 <span class="keywordflow">while</span> (tlen >= <span class="keyword">sizeof</span>(*rtnh) && tlen >= rtnh->rtnh_len) {
<a name="l00167"></a>00167 nh = rtnl_route_nh_alloc();
<a name="l00168"></a>00168 <span class="keywordflow">if</span> (!nh)
<a name="l00169"></a>00169 <span class="keywordflow">goto</span> errout;
<a name="l00170"></a>00170
<a name="l00171"></a>00171 rtnl_route_nh_set_weight(nh, rtnh->rtnh_hops);
<a name="l00172"></a>00172 rtnl_route_nh_set_ifindex(nh, rtnh->rtnh_ifindex);
<a name="l00173"></a>00173 rtnl_route_nh_set_flags(nh, rtnh->rtnh_flags);
<a name="l00174"></a>00174
<a name="l00175"></a>00175 <span class="keywordflow">if</span> (rtnh->rtnh_len > <span class="keyword">sizeof</span>(*rtnh)) {
<a name="l00176"></a>00176 <span class="keyword">struct </span>nlattr *ntb[RTA_MAX + 1];
<a name="l00177"></a>00177 <a class="code" href="group__attr.html#gaa7ad544b5a93034602a442eb26cda92c" title="Parse a stream of attributes into a tb buffer.">nla_parse</a>(ntb, RTA_MAX, (<span class="keyword">struct</span> nlattr *)
<a name="l00178"></a>00178 RTNH_DATA(rtnh),
<a name="l00179"></a>00179 rtnh->rtnh_len - <span class="keyword">sizeof</span>(*rtnh),
<a name="l00180"></a>00180 route_policy);
<a name="l00181"></a>00181
<a name="l00182"></a>00182 <span class="keywordflow">if</span> (ntb[RTA_GATEWAY]) {
<a name="l00183"></a>00183 nh->rtnh_gateway = <a class="code" href="group__attr.html#ga98a5ac1eefea9266cf46c91b9a9867f3" title="Return payload of address attribute.">nla_get_addr</a>(
<a name="l00184"></a>00184 ntb[RTA_GATEWAY],
<a name="l00185"></a>00185 route->rt_family);
<a name="l00186"></a>00186 nh->rtnh_mask = NEXTHOP_HAS_GATEWAY;
<a name="l00187"></a>00187 }
<a name="l00188"></a>00188 }
<a name="l00189"></a>00189
<a name="l00190"></a>00190 rtnl_route_add_nexthop(route, nh);
<a name="l00191"></a>00191 tlen -= RTNH_ALIGN(rtnh->rtnh_len);
<a name="l00192"></a>00192 rtnh = RTNH_NEXT(rtnh);
<a name="l00193"></a>00193 }
<a name="l00194"></a>00194 }
<a name="l00195"></a>00195
<a name="l00196"></a>00196 <span class="keywordflow">if</span> (tb[RTA_FLOW])
<a name="l00197"></a>00197 rtnl_route_set_realms(route, <a class="code" href="group__attr.html#gabda0290a8b26cc577c2c5cefa814aeac" title="Return payload of u32 attribute.">nla_get_u32</a>(tb[RTA_FLOW]));
<a name="l00198"></a>00198
<a name="l00199"></a>00199 <span class="keywordflow">if</span> (tb[RTA_CACHEINFO])
<a name="l00200"></a>00200 copy_cacheinfo_into_route(<a class="code" href="group__attr.html#gaf39d6bbd2be1fc2de30b6b7d079a5fce" title="head of payload">nla_data</a>(tb[RTA_CACHEINFO]), route);
<a name="l00201"></a>00201
<a name="l00202"></a>00202 <span class="keywordflow">if</span> (tb[RTA_MP_ALGO])
<a name="l00203"></a>00203 rtnl_route_set_mp_algo(route, <a class="code" href="group__attr.html#gabda0290a8b26cc577c2c5cefa814aeac" title="Return payload of u32 attribute.">nla_get_u32</a>(tb[RTA_MP_ALGO]));
<a name="l00204"></a>00204
<a name="l00205"></a>00205 err = pp->pp_cb((<span class="keyword">struct</span> nl_object *) route, pp);
<a name="l00206"></a>00206 <span class="keywordflow">if</span> (err < 0)
<a name="l00207"></a>00207 <span class="keywordflow">goto</span> errout;
<a name="l00208"></a>00208
<a name="l00209"></a>00209 err = P_ACCEPT;
<a name="l00210"></a>00210
<a name="l00211"></a>00211 errout:
<a name="l00212"></a>00212 rtnl_route_put(route);
<a name="l00213"></a>00213 <span class="keywordflow">return</span> err;
<a name="l00214"></a>00214
<a name="l00215"></a>00215 errout_errno:
<a name="l00216"></a>00216 err = nl_get_errno();
<a name="l00217"></a>00217 <span class="keywordflow">goto</span> errout;
<a name="l00218"></a>00218 }
<a name="l00219"></a>00219
<a name="l00220"></a>00220 <span class="keyword">static</span> <span class="keywordtype">int</span> route_request_update(<span class="keyword">struct</span> nl_cache *c, <span class="keyword">struct</span> nl_handle *h)
<a name="l00221"></a>00221 {
<a name="l00222"></a>00222 <span class="keywordflow">return</span> <a class="code" href="group__rtnl.html#ga1fcd1a88d7f810c50849f13d97b5fe10" title="Send routing netlink request message.">nl_rtgen_request</a>(h, RTM_GETROUTE, AF_UNSPEC, <a class="code" href="group__msg.html#ga8d4fb2458c013decb6673f41c52c07b1" title="Dump all entries.">NLM_F_DUMP</a>);
<a name="l00223"></a>00223 }
<a name="l00224"></a>00224 <span class="comment"></span>
<a name="l00225"></a>00225 <span class="comment">/**</span>
<a name="l00226"></a>00226 <span class="comment"> * @name Cache Management</span>
<a name="l00227"></a>00227 <span class="comment"> * @{</span>
<a name="l00228"></a>00228 <span class="comment"> */</span>
<a name="l00229"></a>00229 <span class="comment"></span>
<a name="l00230"></a>00230 <span class="comment">/**</span>
<a name="l00231"></a>00231 <span class="comment"> * Build a route cache holding all routes currently configured in the kernel</span>
<a name="l00232"></a>00232 <span class="comment"> * @arg handle netlink handle</span>
<a name="l00233"></a>00233 <span class="comment"> *</span>
<a name="l00234"></a>00234 <span class="comment"> * Allocates a new cache, initializes it properly and updates it to</span>
<a name="l00235"></a>00235 <span class="comment"> * contain all routes currently configured in the kernel.</span>
<a name="l00236"></a>00236 <span class="comment"> *</span>
<a name="l00237"></a>00237 <span class="comment"> * @note The caller is responsible for destroying and freeing the</span>
<a name="l00238"></a>00238 <span class="comment"> * cache after using it.</span>
<a name="l00239"></a>00239 <span class="comment"> * @return The cache or NULL if an error has occured.</span>
<a name="l00240"></a>00240 <span class="comment"> */</span>
<a name="l00241"></a><a class="code" href="group__route.html#ga3c018360c6ac0ba9c63b6165abee3f16">00241</a> <span class="keyword">struct </span>nl_cache *<a class="code" href="group__route.html#ga3c018360c6ac0ba9c63b6165abee3f16" title="Build a route cache holding all routes currently configured in the kernel.">rtnl_route_alloc_cache</a>(<span class="keyword">struct</span> nl_handle *handle)
<a name="l00242"></a>00242 {
<a name="l00243"></a>00243 <span class="keyword">struct </span>nl_cache *cache;
<a name="l00244"></a>00244
<a name="l00245"></a>00245 cache = <a class="code" href="group__cache.html#ga9520ae0f2158db3c081f34c851d92252" title="Allocate an empty cache.">nl_cache_alloc</a>(&rtnl_route_ops);
<a name="l00246"></a>00246 <span class="keywordflow">if</span> (!cache)
<a name="l00247"></a>00247 <span class="keywordflow">return</span> NULL;
<a name="l00248"></a>00248
<a name="l00249"></a>00249 <span class="keywordflow">if</span> (handle && <a class="code" href="group__cache.html#gaf5bd584017847e6ef69ec36739a6aaf0" title="(Re)fill a cache with the contents in the kernel.">nl_cache_refill</a>(handle, cache) < 0) {
<a name="l00250"></a>00250 free(cache);
<a name="l00251"></a>00251 <span class="keywordflow">return</span> NULL;
<a name="l00252"></a>00252 }
<a name="l00253"></a>00253
<a name="l00254"></a>00254 <span class="keywordflow">return</span> cache;
<a name="l00255"></a>00255 }
<a name="l00256"></a>00256 <span class="comment"></span>
<a name="l00257"></a>00257 <span class="comment">/** @} */</span>
<a name="l00258"></a>00258 <span class="comment"></span>
<a name="l00259"></a>00259 <span class="comment">/**</span>
<a name="l00260"></a>00260 <span class="comment"> * @name Route Addition</span>
<a name="l00261"></a>00261 <span class="comment"> * @{</span>
<a name="l00262"></a>00262 <span class="comment"> */</span>
<a name="l00263"></a>00263
<a name="l00264"></a>00264 <span class="keyword">static</span> <span class="keyword">struct </span>nl_msg *build_route_msg(<span class="keyword">struct</span> rtnl_route *tmpl, <span class="keywordtype">int</span> cmd,
<a name="l00265"></a>00265 <span class="keywordtype">int</span> flags)
<a name="l00266"></a>00266 {
<a name="l00267"></a>00267 <span class="keyword">struct </span>nl_msg *msg;
<a name="l00268"></a>00268 <span class="keyword">struct </span>nl_addr *addr;
<a name="l00269"></a>00269 <span class="keywordtype">int</span> scope, i, oif, nmetrics = 0;
<a name="l00270"></a>00270 <span class="keyword">struct </span>nlattr *metrics;
<a name="l00271"></a>00271 <span class="keyword">struct </span>rtmsg rtmsg = {
<a name="l00272"></a>00272 .rtm_family = rtnl_route_get_family(tmpl),
<a name="l00273"></a>00273 .rtm_dst_len = rtnl_route_get_dst_len(tmpl),
<a name="l00274"></a>00274 .rtm_src_len = rtnl_route_get_src_len(tmpl),
<a name="l00275"></a>00275 .rtm_tos = rtnl_route_get_tos(tmpl),
<a name="l00276"></a>00276 .rtm_table = rtnl_route_get_table(tmpl),
<a name="l00277"></a>00277 .rtm_type = rtnl_route_get_type(tmpl),
<a name="l00278"></a>00278 .rtm_protocol = rtnl_route_get_protocol(tmpl),
<a name="l00279"></a>00279 .rtm_flags = rtnl_route_get_flags(tmpl),
<a name="l00280"></a>00280 };
<a name="l00281"></a>00281
<a name="l00282"></a>00282 <span class="keywordflow">if</span> (rtmsg.rtm_family == AF_UNSPEC) {
<a name="l00283"></a>00283 nl_error(EINVAL, <span class="stringliteral">"Cannot build route message, address "</span> \
<a name="l00284"></a>00284 <span class="stringliteral">"family is unknown."</span>);
<a name="l00285"></a>00285 <span class="keywordflow">return</span> NULL;
<a name="l00286"></a>00286 }
<a name="l00287"></a>00287
<a name="l00288"></a>00288 scope = rtnl_route_get_scope(tmpl);
<a name="l00289"></a>00289 <span class="keywordflow">if</span> (scope == RT_SCOPE_NOWHERE) {
<a name="l00290"></a>00290 <span class="keywordflow">if</span> (rtmsg.rtm_type == RTN_LOCAL)
<a name="l00291"></a>00291 scope = RT_SCOPE_HOST;
<a name="l00292"></a>00292 <span class="keywordflow">else</span> {
<a name="l00293"></a>00293 <span class="comment">/* XXX Change to UNIVERSE if gw || nexthops */</span>
<a name="l00294"></a>00294 scope = RT_SCOPE_LINK;
<a name="l00295"></a>00295 }
<a name="l00296"></a>00296 }
<a name="l00297"></a>00297
<a name="l00298"></a>00298 rtmsg.rtm_scope = scope;
<a name="l00299"></a>00299
<a name="l00300"></a>00300 msg = <a class="code" href="group__msg.html#ga580d8697d19050c55060bc10ab4eae9f" title="Allocate a new netlink message.">nlmsg_alloc_simple</a>(cmd, flags);
<a name="l00301"></a>00301 <span class="keywordflow">if</span> (msg == NULL)
<a name="l00302"></a>00302 <span class="keywordflow">return</span> NULL;
<a name="l00303"></a>00303
<a name="l00304"></a>00304 <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, &rtmsg, <span class="keyword">sizeof</span>(rtmsg), NLMSG_ALIGNTO) < 0)
<a name="l00305"></a>00305 <span class="keywordflow">goto</span> nla_put_failure;
<a name="l00306"></a>00306
<a name="l00307"></a>00307 addr = rtnl_route_get_dst(tmpl);
<a name="l00308"></a>00308 <span class="keywordflow">if</span> (addr)
<a name="l00309"></a>00309 <a class="code" href="group__attr.html#ga34038d75b33942a151a0e91791629a76" title="Add a address attribute to a netlink message.">NLA_PUT_ADDR</a>(msg, RTA_DST, addr);
<a name="l00310"></a>00310
<a name="l00311"></a>00311 addr = rtnl_route_get_src(tmpl);
<a name="l00312"></a>00312 <span class="keywordflow">if</span> (addr)
<a name="l00313"></a>00313 <a class="code" href="group__attr.html#ga34038d75b33942a151a0e91791629a76" title="Add a address attribute to a netlink message.">NLA_PUT_ADDR</a>(msg, RTA_SRC, addr);
<a name="l00314"></a>00314
<a name="l00315"></a>00315 addr = rtnl_route_get_gateway(tmpl);
<a name="l00316"></a>00316 <span class="keywordflow">if</span> (addr)
<a name="l00317"></a>00317 <a class="code" href="group__attr.html#ga34038d75b33942a151a0e91791629a76" title="Add a address attribute to a netlink message.">NLA_PUT_ADDR</a>(msg, RTA_GATEWAY, addr);
<a name="l00318"></a>00318
<a name="l00319"></a>00319 addr = rtnl_route_get_pref_src(tmpl);
<a name="l00320"></a>00320 <span class="keywordflow">if</span> (addr)
<a name="l00321"></a>00321 <a class="code" href="group__attr.html#ga34038d75b33942a151a0e91791629a76" title="Add a address attribute to a netlink message.">NLA_PUT_ADDR</a>(msg, RTA_PREFSRC, addr);
<a name="l00322"></a>00322
<a name="l00323"></a>00323 <a class="code" href="group__attr.html#ga61c87db4b2aa6c7b31e733d1ec684efb" title="Add a u32 netlink attribute to a netlink message.">NLA_PUT_U32</a>(msg, RTA_PRIORITY, rtnl_route_get_prio(tmpl));
<a name="l00324"></a>00324
<a name="l00325"></a>00325 oif = rtnl_route_get_oif(tmpl);
<a name="l00326"></a>00326 <span class="keywordflow">if</span> (oif != <a class="code" href="group__link.html#ga774720bec7d14a6e314238c42122ec78" title="Special interface index stating the link was not found.">RTNL_LINK_NOT_FOUND</a>)
<a name="l00327"></a>00327 <a class="code" href="group__attr.html#ga61c87db4b2aa6c7b31e733d1ec684efb" title="Add a u32 netlink attribute to a netlink message.">NLA_PUT_U32</a>(msg, RTA_OIF, oif);
<a name="l00328"></a>00328
<a name="l00329"></a>00329 <span class="keywordflow">for</span> (i = 1; i <= RTAX_MAX; i++)
<a name="l00330"></a>00330 <span class="keywordflow">if</span> (rtnl_route_get_metric(tmpl, i) != UINT_MAX)
<a name="l00331"></a>00331 nmetrics++;
<a name="l00332"></a>00332
<a name="l00333"></a>00333 <span class="keywordflow">if</span> (nmetrics > 0) {
<a name="l00334"></a>00334 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> val;
<a name="l00335"></a>00335
<a name="l00336"></a>00336 metrics = <a class="code" href="group__attr.html#ga18640b6320b8959bb586fa2ca456130c" title="Start a new level of nested attributes.">nla_nest_start</a>(msg, RTA_METRICS);
<a name="l00337"></a>00337 <span class="keywordflow">if</span> (metrics == NULL)
<a name="l00338"></a>00338 <span class="keywordflow">goto</span> nla_put_failure;
<a name="l00339"></a>00339
<a name="l00340"></a>00340 <span class="keywordflow">for</span> (i = 1; i <= RTAX_MAX; i++) {
<a name="l00341"></a>00341 val = rtnl_route_get_metric(tmpl, i);
<a name="l00342"></a>00342 <span class="keywordflow">if</span> (val != UINT_MAX)
<a name="l00343"></a>00343 <a class="code" href="group__attr.html#ga61c87db4b2aa6c7b31e733d1ec684efb" title="Add a u32 netlink attribute to a netlink message.">NLA_PUT_U32</a>(msg, i, val);
<a name="l00344"></a>00344 }
<a name="l00345"></a>00345
<a name="l00346"></a>00346 <a class="code" href="group__attr.html#ga067f9ada74902c02d97c725a47f590b7" title="Finalize nesting of attributes.">nla_nest_end</a>(msg, metrics);
<a name="l00347"></a>00347 }
<a name="l00348"></a>00348
<a name="l00349"></a>00349 <span class="preprocessor">#if 0</span>
<a name="l00350"></a>00350 <span class="preprocessor"></span> RTA_IIF,
<a name="l00351"></a>00351 RTA_MULTIPATH,
<a name="l00352"></a>00352 RTA_PROTOINFO,
<a name="l00353"></a>00353 RTA_FLOW,
<a name="l00354"></a>00354 RTA_CACHEINFO,
<a name="l00355"></a>00355 RTA_SESSION,
<a name="l00356"></a>00356 RTA_MP_ALGO,
<a name="l00357"></a>00357 <span class="preprocessor">#endif</span>
<a name="l00358"></a>00358 <span class="preprocessor"></span>
<a name="l00359"></a>00359 <span class="keywordflow">return</span> msg;
<a name="l00360"></a>00360
<a name="l00361"></a>00361 nla_put_failure:
<a name="l00362"></a>00362 <a class="code" href="group__msg.html#ga138ba9bee70553f9fbe7143deacad48c" title="Free a netlink message.">nlmsg_free</a>(msg);
<a name="l00363"></a>00363 <span class="keywordflow">return</span> NULL;
<a name="l00364"></a>00364 }
<a name="l00365"></a>00365
<a name="l00366"></a>00366 <span class="keyword">struct </span>nl_msg *rtnl_route_build_add_request(<span class="keyword">struct</span> rtnl_route *tmpl, <span class="keywordtype">int</span> flags)
<a name="l00367"></a>00367 {
<a name="l00368"></a>00368 <span class="keywordflow">return</span> build_route_msg(tmpl, RTM_NEWROUTE, <a class="code" href="group__msg.html#ga20a00ae52e4c150f54649d7346d23a7a" title="Create config object if it doesn&#39;t already exist.">NLM_F_CREATE</a> | flags);
<a name="l00369"></a>00369 }
<a name="l00370"></a>00370
<a name="l00371"></a>00371 <span class="keywordtype">int</span> rtnl_route_add(<span class="keyword">struct</span> nl_handle *handle, <span class="keyword">struct</span> rtnl_route *route,
<a name="l00372"></a>00372 <span class="keywordtype">int</span> flags)
<a name="l00373"></a>00373 {
<a name="l00374"></a>00374 <span class="keyword">struct </span>nl_msg *msg;
<a name="l00375"></a>00375 <span class="keywordtype">int</span> err;
<a name="l00376"></a>00376
<a name="l00377"></a>00377 msg = rtnl_route_build_add_request(route, flags);
<a name="l00378"></a>00378 <span class="keywordflow">if</span> (!msg)
<a name="l00379"></a>00379 <span class="keywordflow">return</span> nl_get_errno();
<a name="l00380"></a>00380
<a name="l00381"></a>00381 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="l00382"></a>00382 <a class="code" href="group__msg.html#ga138ba9bee70553f9fbe7143deacad48c" title="Free a netlink message.">nlmsg_free</a>(msg);
<a name="l00383"></a>00383 <span class="keywordflow">if</span> (err < 0)
<a name="l00384"></a>00384 <span class="keywordflow">return</span> err;
<a name="l00385"></a>00385
<a name="l00386"></a>00386 <span class="keywordflow">return</span> <a class="code" href="group__nl.html#gaa65fec588e0a0a2de1881fb8366ccd79" title="Wait for ACK.">nl_wait_for_ack</a>(handle);
<a name="l00387"></a>00387 }
<a name="l00388"></a>00388
<a name="l00389"></a>00389 <span class="keyword">struct </span>nl_msg *rtnl_route_build_del_request(<span class="keyword">struct</span> rtnl_route *tmpl, <span class="keywordtype">int</span> flags)
<a name="l00390"></a>00390 {
<a name="l00391"></a>00391 <span class="keywordflow">return</span> build_route_msg(tmpl, RTM_DELROUTE, flags);
<a name="l00392"></a>00392 }
<a name="l00393"></a>00393
<a name="l00394"></a>00394 <span class="keywordtype">int</span> rtnl_route_del(<span class="keyword">struct</span> nl_handle *handle, <span class="keyword">struct</span> rtnl_route *route,
<a name="l00395"></a>00395 <span class="keywordtype">int</span> flags)
<a name="l00396"></a>00396 {
<a name="l00397"></a>00397 <span class="keyword">struct </span>nl_msg *msg;
<a name="l00398"></a>00398 <span class="keywordtype">int</span> err;
<a name="l00399"></a>00399
<a name="l00400"></a>00400 msg = rtnl_route_build_del_request(route, flags);
<a name="l00401"></a>00401 <span class="keywordflow">if</span> (!msg)
<a name="l00402"></a>00402 <span class="keywordflow">return</span> nl_get_errno();
<a name="l00403"></a>00403
<a name="l00404"></a>00404 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="l00405"></a>00405 <a class="code" href="group__msg.html#ga138ba9bee70553f9fbe7143deacad48c" title="Free a netlink message.">nlmsg_free</a>(msg);
<a name="l00406"></a>00406 <span class="keywordflow">if</span> (err < 0)
<a name="l00407"></a>00407 <span class="keywordflow">return</span> err;
<a name="l00408"></a>00408
<a name="l00409"></a>00409 <span class="keywordflow">return</span> <a class="code" href="group__nl.html#gaa65fec588e0a0a2de1881fb8366ccd79" title="Wait for ACK.">nl_wait_for_ack</a>(handle);
<a name="l00410"></a>00410 }
<a name="l00411"></a>00411 <span class="comment"></span>
<a name="l00412"></a>00412 <span class="comment">/** @} */</span>
<a name="l00413"></a>00413
<a name="l00414"></a>00414 <span class="keyword">static</span> <span class="keyword">struct </span><a class="code" href="structnl__af__group.html" title="Address family to netlink group association.">nl_af_group</a> route_groups[] = {
<a name="l00415"></a>00415 { AF_INET, RTNLGRP_IPV4_ROUTE },
<a name="l00416"></a>00416 { AF_INET6, RTNLGRP_IPV6_ROUTE },
<a name="l00417"></a>00417 { AF_DECnet, RTNLGRP_DECnet_ROUTE },
<a name="l00418"></a>00418 { END_OF_GROUP_LIST },
<a name="l00419"></a>00419 };
<a name="l00420"></a>00420
<a name="l00421"></a>00421 <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> rtnl_route_ops = {
<a name="l00422"></a>00422 .co_name = <span class="stringliteral">"route/route"</span>,
<a name="l00423"></a>00423 .co_hdrsize = <span class="keyword">sizeof</span>(<span class="keyword">struct </span>rtmsg),
<a name="l00424"></a>00424 .co_msgtypes = {
<a name="l00425"></a>00425 { RTM_NEWROUTE, NL_ACT_NEW, <span class="stringliteral">"new"</span> },
<a name="l00426"></a>00426 { RTM_DELROUTE, NL_ACT_DEL, <span class="stringliteral">"del"</span> },
<a name="l00427"></a>00427 { RTM_GETROUTE, NL_ACT_GET, <span class="stringliteral">"get"</span> },
<a name="l00428"></a>00428 END_OF_MSGTYPES_LIST,
<a name="l00429"></a>00429 },
<a name="l00430"></a>00430 .co_protocol = NETLINK_ROUTE,
<a name="l00431"></a>00431 .co_groups = route_groups,
<a name="l00432"></a>00432 .co_request_update = route_request_update,
<a name="l00433"></a>00433 .co_msg_parser = route_msg_parser,
<a name="l00434"></a>00434 .co_obj_ops = &route_obj_ops,
<a name="l00435"></a>00435 };
<a name="l00436"></a>00436
<a name="l00437"></a>00437 <span class="keyword">static</span> <span class="keywordtype">void</span> __init route_init(<span class="keywordtype">void</span>)
<a name="l00438"></a>00438 {
<a name="l00439"></a>00439 <a class="code" href="group__cache__mngt.html#ga390eeb1fa61634cf1c216792c6df63c3" title="Register a set of cache operations.">nl_cache_mngt_register</a>(&rtnl_route_ops);
<a name="l00440"></a>00440 }
<a name="l00441"></a>00441
<a name="l00442"></a>00442 <span class="keyword">static</span> <span class="keywordtype">void</span> __exit route_exit(<span class="keywordtype">void</span>)
<a name="l00443"></a>00443 {
<a name="l00444"></a>00444 <a class="code" href="group__cache__mngt.html#ga09f56b767b3868b7e0cf8559863dde77" title="Unregister a set of cache operations.">nl_cache_mngt_unregister</a>(&rtnl_route_ops);
<a name="l00445"></a>00445 }
<a name="l00446"></a>00446 <span class="comment"></span>
<a name="l00447"></a>00447 <span class="comment">/** @} */</span>
</pre></div></div>
</div>
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