http://git-wip-us.apache.org/repos/asf/mesos-site/blob/4aba3b68/content/api/latest/c++/filter_2internal_8hpp_source.html ---------------------------------------------------------------------- diff --git a/content/api/latest/c++/filter_2internal_8hpp_source.html b/content/api/latest/c++/filter_2internal_8hpp_source.html index 1287b25..8733395 100644 --- a/content/api/latest/c++/filter_2internal_8hpp_source.html +++ b/content/api/latest/c++/filter_2internal_8hpp_source.html @@ -52,7 +52,7 @@ <div class="title">internal.hpp</div> </div> </div><!--header--> <div class="contents"> -<a href="filter_2internal_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Licensed to the Apache Software Foundation (ASF) under one</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// or more contributor license agreements. See the NOTICE file</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// distributed with this work for additional information</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// regarding copyright ownership. The ASF licenses this file</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// to you under the Apache License, Version 2.0 (the</span></div><div class="line"><a name="l00006"></a> <span class="lineno"> 6</span> <span class="comment">// "License"); you may not use this file except in compliance</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// with the License. You may obtain a copy of the License at</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">//</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">//</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">// See the License for the specific language governing permissions and</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment">// limitations under the License.</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#ifndef __LINUX_ROUTING_FILTER_INTERNAL_HPP__</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#define __LINUX_ROUTING_FILTER_INTERNAL_ HPP__</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include <stdint.h></span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> </div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <netlink/cache.h></span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <netlink/errno.h></span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <netlink/object.h></span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <netlink/socket.h></span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26< /span> </div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include <netlink/route/classifier.h></span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include <netlink/route/link.h></span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <netlink/route/tc.h></span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <netlink/route/act/mirred.h></span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include <netlink/route/cls/basic.h></span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include <netlink/route/cls/u32.h></span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#include <string></span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#include <vector></span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#include <<a class="code" href="3rdparty_2libprocess_2include_2process_2shared_8hpp.html">process/shared.hpp</a>></span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class ="preprocessor">#include <<a class="code" href="error_8hpp.html">stout/error.hpp</a>></span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#include <<a class="code" href="foreach_8hpp.html">stout/foreach.hpp</a>></span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#include <<a class="code" href="hashmap_8hpp.html">stout/hashmap.hpp</a>></span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor">#include <<a class="code" href="hashset_8hpp.html">stout/hashset.hpp</a>></span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#include <<a class="code" href="none_8hpp.html">stout/none.hpp</a>></span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor">#inclu de <<a class="code" href="nothing_8hpp.html">stout/nothing.hpp</a>></span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#include <<a class="code" href="option_8hpp.html">stout/option.hpp</a>></span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="preprocessor">#include <<a class="code" href="result_8hpp.html">stout/result.hpp</a>></span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#include <<a class="code" href="try_8hpp.html">stout/try.hpp</a>></span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor">#include "<a class="code" href="handle_8hpp.html">linux/routing/handle.hpp</a>"</span></div><div class="line"><a name="l00052"></a><s pan class="lineno"> 52</span> <span class="preprocessor">#include "<a class="code" href="internal_8hpp.html">linux/routing/internal.hpp</a>"</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> </div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor">#include "<a class="code" href="action_8hpp.html">linux/routing/filter/action.hpp</a>"</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="preprocessor">#include "<a class="code" href="src_2linux_2routing_2filter_2filter_8hpp.html">linux/routing/filter/filter.hpp</a>"</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor">#include "<a class="code" href="filter_2handle_8hpp.html">linux/routing/filter/handle.hpp</a>"</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 5 7</span> <span class="preprocessor">#include "<a class="code" href="priority_8hpp.html">linux/routing/filter/priority.hpp</a>"</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="preprocessor">#include "<a class="code" href="link_2internal_8hpp.html">linux/routing/link/internal.hpp</a>"</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="keyword">namespace </span><a class="code" href="namespacerouting.html">routing</a> {</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="keyword">template</span> <></div><div class="line"><a name="l00064"></a><span class="lineno "><a class="line" href="namespacerouting.html#a728e253aba8e42f601752ddc771e9902"> 64</a></span> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="namespacerouting.html#a728e253aba8e42f601752ddc771e9902">cleanup</a>(<span class="keyword">struct</span> rtnl_cls* cls)</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> {</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  rtnl_cls_put(cls);</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> }</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="keyword">namespace </span><a class="code" href="namespaceprocess.html#a3054d5443603436a6315f210a412cbbc">filter</a> {</div><div class="line"><a name="l00070"></a><span class="lineno"><a class="line" href="namespacerouting_1_ 1filter_1_1internal.html"> 70</a></span> <span class="keyword">namespace </span><a class="code" href="namespaceinternal.html">internal</a> {</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment">// Helpers for {en}decoding.</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"></span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment">// Forward declaration. Each type of classifier needs to implement</span></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment">// this function to encode itself into the libnl filter (rtnl_cls).</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="keyword">template</span> <<span class="keyword">typen ame</span> Classifier></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <a class="code" href="classTry.html">Try<Nothing></a> <a class="code" href="namespacerouting_1_1filter_1_1internal.html#af143a877c566cca8dacc77d3b64f3372">encode</a>(</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keyword">const</span> <a class="code" href="classrouting_1_1Netlink.html">Netlink<struct rtnl_cls></a>& cls,</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keyword">const</span> Classifier& classifier);</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment">// Forward declaration. Each type of classifier needs to implement</span ></div><div class="line"><a name="l00085"></a><span class="lineno"> >85</span> <span class="comment">// this function to decode itself from >the libnl filter (rtnl_cls).</span></div><div class="line"><a >name="l00086"></a><span class="lineno"> 86</span> <span >class="comment">// Returns None if the libnl filter does not match the type >of the</span></div><div class="line"><a name="l00087"></a><span >class="lineno"> 87</span> <span class="comment">// >classifier.</span></div><div class="line"><a name="l00088"></a><span >class="lineno"> 88</span> <span class="keyword">template</span> ><<span class="keyword">typename</span> Classifier></div><div >class="line"><a name="l00089"></a><span class="lineno"> 89</span> <a >class="code" href="classResult.html">Result<Classifier></a> <a >class="code" >href="namespacerouting_1_1filter_1_1internal.html#a584df149d400373b0ed7c48c1b07cecd">decode</a>(<span > class="keyword">const</span> <a class="code" href="classrouti ng_1_1Netlink.html">Netlink<struct rtnl_cls></a>& cls);</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> </div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment">// Attaches a redirect action to the libnl filter (rtnl_cls).</span></div><div class="line"><a name="l00093"></a><span class="lineno"><a class="line" href="namespacerouting_1_1filter_1_1internal.html#a3ae22bb34cae1ea9e5d0a30cafeb0d4f"> 93</a></span> <span class="keyword">inline</span> <a class="code" href="classTry.html">Try<Nothing></a> <a class="code" href="namespacerouting_1_1filter_1_1internal.html#a3ae22bb34cae1ea9e5d0a30cafeb0d4f">attach</a>(</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keyword">const</span> <a class="code" href="classrouting_1_1Netlink.html">Netlink<struct rtnl_cls></a>& cls,</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keyword">const</span> <a class="code" href="structrouting_1_1action_1_1Redirect.html">action::Redirect</a>& <a class="code" href="namespaceprocess_1_1io.html#ab9c4a52a88fcc9983438e391643424ca">redirect</a>)</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> {</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <a class="code" href="classResult.html">Result<Netlink<struct rtnl_link></a>> link =</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <a class="code" href="namespacerouting_1_1link_1_1internal.html#a01998838b3ff4f3123f42927f7f54738">link::internal::get</a>(redirect.<a class="code" href="structrouting_1_1action_1_1Redirect.html#a0e300417a11c82969cd5aa5c9a336fa3">link</a>);</div><div class="line"><a name="l00099"></a><span class="lineno" > 99</span> </div><div class="line"><a name="l00100"></a><span > class="lineno"> 100</span>  <span class="keywordflow">if</span> > (link.<a class="code" > href="classResult.html#aeca16ad17d299ad885c9b46c83b12a3d">isError</a>()) > {</div><div class="line"><a name="l00101"></a><span class="lineno"> > 101</span>  <span class="keywordflow">return</span> <a class="code" > href="classError.html">Error</a>(link.<a class="code" > href="classResult.html#a521adf96f5c27d26d6b1d580aae8aaee">error</a>());</div><div > class="line"><a name="l00102"></a><span class="lineno"> 102</span>  > } <span class="keywordflow">else</span> <span class="keywordflow">if</span> > (link.<a class="code" > href="classResult.html#ac2cdc0db9f9d29a5bb2f1cf19c29da49">isNone</a>()) > {</div><div class="line"><a name="l00103"></a><span class="lineno"> > 103</span>  <span class="keywordflow">return</span> <a class="code" > href="classError.html">Error</a>(<span class="stringliteral">"Link > '"</span> + redirect.<a class="code" href="structrouting_1_1action_1_1Redirect.html#a0e300417a11c82969cd5aa5c9a336fa3">link</a> + <span class="stringliteral">"' is not found"</span>);</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  }</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="comment">// TODO(jieyu): Note that currently, we don't use Netlink for 'act'</span></div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="comment">// because libnl has a refcount issue for rtnl_act. Clean this up</span></div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="comment">// once the bug is fixed in libnl.</span></div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keyword">struct </span>rtnl_act* act = rtnl_act_alloc();</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">if</span> (act == <span class="keyword">nullptr</span>) {</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">"Failed to allocate a libnl action (rtnl_act)"</span>);</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  }</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> </div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="comment">// Set the kind of the action to 'mirred'. The kind 'mirred' stands</span></div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="comment">// for mirror or redirect actions.</span> </div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keywordtype">int</span> <a class="code" href="namespacemesos_1_1internal_1_1slave_1_1cni_1_1spec.html#ae58e703656ab4a1bd5d9870441236727">error</a> = rtnl_tc_set_kind(TC_CAST(act), <span class="stringliteral">"mirred"</span>);</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordflow">if</span> (error != 0) {</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  rtnl_act_put(act);</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="stringliteral">"Failed to set the kind of the action: "</span> +</div><div class="line"><a name="l00121"></a><span class="lineno" > 121</span>  std::string(nl_geterror(error)));</div><div > class="line"><a name="l00122"></a><span class="lineno"> 122</span>  > }</div><div class="line"><a name="l00123"></a><span class="lineno"> > 123</span> </div><div class="line"><a name="l00124"></a><span > class="lineno"> 124</span>  rtnl_mirred_set_ifindex(act, > rtnl_link_get_ifindex(link.<a class="code" > href="classResult.html#aedf79f3b14dcda5791b84a64ada4d412">get</a>().get()));</div><div > class="line"><a name="l00125"></a><span class="lineno"> 125</span>  > rtnl_mirred_set_action(act, TCA_EGRESS_REDIR);</div><div class="line"><a > name="l00126"></a><span class="lineno"> 126</span>  > rtnl_mirred_set_policy(act, TC_ACT_STOLEN);</div><div class="line"><a > name="l00127"></a><span class="lineno"> 127</span> </div><div > class="line"><a name="l00128"></a><span class="lineno"> 128</span>  > <span class="keyword">const</span> std::string <a class="code" > href="namespacemesos_1_1modules.html#a 70163bdea2fe39ef5b798a7d7ee0c220">kind</a> = rtnl_tc_get_kind(TC_CAST(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>()));</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordflow">if</span> (kind == <span class="stringliteral">"basic"</span>) {</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  error = rtnl_basic_add_action(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>(), act);</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">if</span> (error != 0) {</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  rtnl_act_put(act);</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html"> Error</a>(std::string(nl_geterror(error)));</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  }</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (kind == <span class="stringliteral">"u32"</span>) {</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  error = rtnl_u32_add_action(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>(), act);</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keywordflow">if</span> (error != 0) {</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  rtnl_act_put(act);</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Erro r</a>(std::string(nl_geterror(error)));</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  }</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span> </div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="comment">// Automatically set the 'terminal' flag for u32 filters if a</span></div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="comment">// redirect action is attached.</span></div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  error = rtnl_u32_set_cls_terminal(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>());</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordflow">if</span> (error != 0) {</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="stringliteral">"Failed to set the terminal flag: "</span> +</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  std::string(nl_geterror(error)));</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  }</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  rtnl_act_put(act);</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">"Unsupported classifier kind: "</span> + kind);</div><div class="lin e"><a name="l00153"></a><span class="lineno"> 153</span>  }</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span> </div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordflow">return</span> <a class="code" href="structNothing.html">Nothing</a>();</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span> }</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span> </div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span> </div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="comment">// Attaches a mirror action to the libnl filter (rtnl_cls).</span></div><div class="line"><a name="l00160"></a><span class="lineno"><a class="line" href="namespacerouting_1_1filter_1_1internal.html#a8d4c16f68a968cea2dc98e2a8226913c"> 160</a></span> <span class="keyword">inline</span> <a class="code" href="classTry.html">Try<Nothing></a> <a class="code" href="namespacerouting_1_1filter_1_1internal.html#a3ae22bb34cae1ea9e5d0a30cafeb0d4f">attach</a>(</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keyword">const</span> <a class="code" href="classrouting_1_1Netlink.html">Netlink<struct rtnl_cls></a>& cls,</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keyword">const</span> <a class="code" href="structrouting_1_1action_1_1Mirror.html">action::Mirror</a>& mirror)</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span> {</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keyword">const</span> std::string <a class="code" href="namespacemesos_1_1modules.html#a70163bdea2fe39ef5b798a7d7ee0c220">kind</a> = rtnl_tc_get_kind(TC_CAST(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276ef be5490b33b471783504b5f89e">get</a>()));</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span> </div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordflow">foreach</span> (<span class="keyword">const</span> std::string& _link, mirror.<a class="code" href="structrouting_1_1action_1_1Mirror.html#a1b3c67466ff6b45287f384ae3c5b6807">links</a>) {</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <a class="code" href="classResult.html">Result<Netlink<struct rtnl_link></a>> link = <a class="code" href="namespacerouting_1_1link_1_1internal.html#a01998838b3ff4f3123f42927f7f54738">link::internal::get</a>(_link);</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordflow">if</span> (link.<a class="code" href="classResult.html#aeca16ad17d299ad885c9b46c83b12a3d">isError</a>()) {</div><div class="line"><a name="l001 69"></a><span class="lineno"> 169</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(link.<a class="code" href="classResult.html#a521adf96f5c27d26d6b1d580aae8aaee">error</a>());</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (link.<a class="code" href="classResult.html#ac2cdc0db9f9d29a5bb2f1cf19c29da49">isNone</a>()) {</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">"Link '"</span> + _link + <span class="stringliteral">"' is not found"</span>);</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  }</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span> </div><div class= "line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="comment">// TODO(jieyu): Note that currently, we don't use Netlink for</span></div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="comment">// 'act' because libnl has a refcount issue for rtnl_act. Clean</span></div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="comment">// this up once libnl fixes the bug.</span></div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keyword">struct </span>rtnl_act* act = rtnl_act_alloc();</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keywordflow">if</span> (act == <span class="keyword">nullptr</span>) {</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keywordflow">return</span> <a class="code" href="classError. html">Error</a>(<span class="stringliteral">"Failed to allocate a libnl action (rtnl_act)"</span>);</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  }</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span> </div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keywordtype">int</span> <a class="code" href="namespacemesos_1_1internal_1_1slave_1_1cni_1_1spec.html#ae58e703656ab4a1bd5d9870441236727">error</a> = rtnl_tc_set_kind(TC_CAST(act), <span class="stringliteral">"mirred"</span>);</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keywordflow">if</span> (error != 0) {</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  rtnl_act_put(act);</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="stringliteral">"Failed to set the kind of the action: "</span> +</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  std::string(nl_geterror(error)));</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  }</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span> </div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  rtnl_mirred_set_ifindex(act, rtnl_link_get_ifindex(link.<a class="code" href="classResult.html#aedf79f3b14dcda5791b84a64ada4d412">get</a>().get()));</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  rtnl_mirred_set_action(act, TCA_EGRESS_MIRROR);</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  rtnl_mirred _set_policy(act, TC_ACT_PIPE);</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span> </div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keywordflow">if</span> (kind == <span class="stringliteral">"basic"</span>) {</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  error = rtnl_basic_add_action(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>(), act);</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="keywordflow">if</span> (error != 0) {</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  rtnl_act_put(act);</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(std::string(nl_geterror(error)));</div ><div class="line"><a name="l00199"></a><span class="lineno"> >199</span>  }</div><div class="line"><a name="l00200"></a><span >class="lineno"> 200</span>  } <span class="keywordflow">else</span> ><span class="keywordflow">if</span> (kind == <span >class="stringliteral">"u32"</span>) {</div><div class="line"><a >name="l00201"></a><span class="lineno"> 201</span>  error = >rtnl_u32_add_action(cls.<a class="code" >href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>(), > act);</div><div class="line"><a name="l00202"></a><span class="lineno"> >202</span>  <span class="keywordflow">if</span> (error != 0) >{</div><div class="line"><a name="l00203"></a><span class="lineno"> >203</span>  rtnl_act_put(act);</div><div class="line"><a >name="l00204"></a><span class="lineno"> 204</span>  <span >class="keywordflow">return</span> <a class="code" >href="classError.html">Error</a>(std::string(nl_geterror(error) ));</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  }</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  rtnl_act_put(act);</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">"Unsupported classifier kind: "</span> + kind);</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  }</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  }</div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span> </div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="comment">// Automatically set the 'term inal' flag for u32 filters if a mirror</span></div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="comment">// action is attached.</span></div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="keywordflow">if</span> (kind == <span class="stringliteral">"u32"</span>) {</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordtype">int</span> <a class="code" href="namespacemesos_1_1internal_1_1slave_1_1cni_1_1spec.html#ae58e703656ab4a1bd5d9870441236727">error</a> = rtnl_u32_set_cls_terminal(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>());</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="keywordflow">if</span> (error != 0) {</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordfl ow">return</span> <a class="code" href="classError.html">Error</a>(</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="stringliteral">"Failed to set the terminal flag: "</span> +</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  std::string(nl_geterror(error)));</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  }</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  }</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span> </div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keywordflow">return</span> <a class="code" href="structNothing.html">Nothing</a>();</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span> }</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span> </div><div class ="line"><a name="l00226"></a><span class="lineno"> 226</span> </div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span> <span class="comment">// Attaches a terminal action to the libnl filter (rtnl_cls). It will</span></div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="comment">// stop the packet from being passed to the next filter if a match is</span></div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="comment">// found. This is only applied to u32 filters (which can match any</span></div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="comment">// 32-bit value in a packet). This function will return error if the</span></div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="comment">// user tries to attach a terminal action to a non-u32 filter.</span></div><div class="line"><a nam e="l00232"></a><span class="lineno"><a class="line" href="namespacerouting_1_1filter_1_1internal.html#a4147e528ed5b27b16f0afd9eedc5085b"> 232</a></span> <span class="keyword">inline</span> <a class="code" href="classTry.html">Try<Nothing></a> <a class="code" href="namespacerouting_1_1filter_1_1internal.html#a3ae22bb34cae1ea9e5d0a30cafeb0d4f">attach</a>(</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keyword">const</span> <a class="code" href="classrouting_1_1Netlink.html">Netlink<struct rtnl_cls></a>& cls,</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keyword">const</span> <a class="code" href="structrouting_1_1action_1_1Terminal.html">action::Terminal</a>& terminal)</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span> {</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="keywo rd">const</span> std::string <a class="code" href="namespacemesos_1_1modules.html#a70163bdea2fe39ef5b798a7d7ee0c220">kind</a> = rtnl_tc_get_kind(TC_CAST(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>()));</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keywordflow">if</span> (kind != <span class="stringliteral">"u32"</span>) {</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">"Cannot attach terminal action to a non-u32 filter."</span>);</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  }</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span> </div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="keywordtype" >int</span> <a class="code" >href="namespacemesos_1_1internal_1_1slave_1_1cni_1_1spec.html#ae58e703656ab4a1bd5d9870441236727">error</a> > = rtnl_u32_set_cls_terminal(cls.<a class="code" >href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>());</div><div > class="line"><a name="l00242"></a><span class="lineno"> 242</span>  ><span class="keywordflow">if</span> (error != 0) {</div><div class="line"><a >name="l00243"></a><span class="lineno"> 243</span>  <span >class="keywordflow">return</span> <a class="code" >href="classError.html">Error</a>(</div><div class="line"><a >name="l00244"></a><span class="lineno"> 244</span>  <span >class="stringliteral">"Failed to set the terminal flag: "</span> >+</div><div class="line"><a name="l00245"></a><span class="lineno"> >245</span>  std::string(nl_geterror(error)));</div><div >class="line"><a name="l00246"></a><span class="lineno"> 246</span>  >}</div><div class="line"><a name="l 00247"></a><span class="lineno"> 247</span> </div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <span class="keywordflow">return</span> <a class="code" href="structNothing.html">Nothing</a>();</div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span> }</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span> </div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span> </div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span> <span class="comment">// Attaches an action to the libnl filter (rtnl_cls). This function</span></div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span> <span class="comment">// essentially delegates the call to the corresponding attach function</span></div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span> <span class="comment">// depending on the type of the action.</sp an></div><div class="line"><a name="l00255"></a><span class="lineno"><a class="line" href="namespacerouting_1_1filter_1_1internal.html#a65ca143d4e951198b3ed448d5696cc2a"> 255</a></span> <span class="keyword">inline</span> <a class="code" href="classTry.html">Try<Nothing></a> <a class="code" href="namespacerouting_1_1filter_1_1internal.html#a3ae22bb34cae1ea9e5d0a30cafeb0d4f">attach</a>(</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="keyword">const</span> <a class="code" href="classrouting_1_1Netlink.html">Netlink<struct rtnl_cls></a>& cls,</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keyword">const</span> <a class="code" href="classprocess_1_1Shared.html">process::Shared<action::Action></a>& action)</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span> {</div><div class="line"><a name="l00259"></a><span class="lineno" > 259</span>  <span class="keyword">const</span> <a class="code" > href="structrouting_1_1action_1_1Redirect.html">action::Redirect</a>* <a > class="code" > href="namespaceprocess_1_1io.html#ab9c4a52a88fcc9983438e391643424ca">redirect</a> > =</div><div class="line"><a name="l00260"></a><span class="lineno"> > 260</span>  <span class="keyword">dynamic_cast<</span><span > class="keyword">const </span><a class="code" > href="structrouting_1_1action_1_1Redirect.html">action::Redirect</a>*<span > class="keyword">></span>(action.<a class="code" > href="classprocess_1_1Shared.html#a1826ec84528910fcec813d35993a1fd4">get</a>());</div><div > class="line"><a name="l00261"></a><span class="lineno"> 261</span>  > <span class="keywordflow">if</span> (redirect != <span > class="keyword">nullptr</span>) {</div><div class="line"><a > name="l00262"></a><span class="lineno"> 262</span>  <span > class="keywordflow">return</span> <a class="code" > href="namespacerouting_1_1filter_1_1internal.htm l#a3ae22bb34cae1ea9e5d0a30cafeb0d4f">attach</a>(cls, *redirect);</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  }</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span> </div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keyword">const</span> <a class="code" href="structrouting_1_1action_1_1Mirror.html">action::Mirror</a>* mirror =</div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  <span class="keyword">dynamic_cast<</span><span class="keyword">const </span><a class="code" href="structrouting_1_1action_1_1Mirror.html">action::Mirror</a>*<span class="keyword">></span>(action.<a class="code" href="classprocess_1_1Shared.html#a1826ec84528910fcec813d35993a1fd4">get</a>());</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="keywordflow">if</span> (mirror != <span class="keyword">nullptr</s pan>) {</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="keywordflow">return</span> <a class="code" href="namespacerouting_1_1filter_1_1internal.html#a3ae22bb34cae1ea9e5d0a30cafeb0d4f">attach</a>(cls, *mirror);</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  }</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span> </div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  <span class="keyword">const</span> <a class="code" href="structrouting_1_1action_1_1Terminal.html">action::Terminal</a>* terminal =</div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="keyword">dynamic_cast<</span><span class="keyword">const </span><a class="code" href="structrouting_1_1action_1_1Terminal.html">action::Terminal</a>*<span class="keyword">></span>(action.<a class="code" href="classprocess_1_1Shared.html#a182 6ec84528910fcec813d35993a1fd4">get</a>());</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="keywordflow">if</span> (terminal != <span class="keyword">nullptr</span>) {</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  <span class="keywordflow">return</span> <a class="code" href="namespacerouting_1_1filter_1_1internal.html#a3ae22bb34cae1ea9e5d0a30cafeb0d4f">attach</a>(cls, *terminal);</div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  }</div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span> </div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">"Unsupported action type"</span>);</div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span> }</div><div class="line "><a name="l00279"></a><span class="lineno"> 279</span> </div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span> </div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span> <span class="comment">// Generates the handle for the given filter on the link. Returns none</span></div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="comment">// if we decide to let the kernel choose the handle.</span></div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Classifier></div><div class="line"><a name="l00284"></a><span class="lineno"><a class="line" href="namespacerouting_1_1filter_1_1internal.html#a7ec08111c4aad6403bc92588f71bc3a6"> 284</a></span> <a class="code" href="classResult.html">Result<U32Handle></a> <a class="code" href="namespacerouting_1_1filter_1_1internal.html#a7 ec08111c4aad6403bc92588f71bc3a6">generateU32Handle</a>(</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="keyword">const</span> <a class="code" href="classrouting_1_1Netlink.html">Netlink<struct rtnl_link></a>& link,</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="keyword">const</span> <a class="code" href="structrouting_1_1filter_1_1Filter.html">Filter<Classifier></a>& <a class="code" href="namespaceprocess.html#a3054d5443603436a6315f210a412cbbc">filter</a>)</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span> {</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="comment">// If the user does not specify a priority, we have no choice but</span></div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="comment">// let the kernel choose the handle bec ause we do not know the</span></div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="comment">// 'htid' that is associated with that priority.</span></div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  <span class="keywordflow">if</span> (filter.<a class="code" href="structrouting_1_1filter_1_1Filter.html#a4092907cf26633122a73f1f6e2f5dea1">priority</a>.isNone()) {</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordflow">return</span> <a class="code" href="structNone.html">None</a>();</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  }</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span> </div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <span class="comment">// Scan all the filters attached to the given parent on the link.</span></div><div class= "line"><a name="l00296"></a><span class="lineno"> 296</span>  <a class="code" href="classTry.html">Try<Netlink<struct nl_sock></a>> <a class="code" href="namespacerouting.html#aee51d4e36a57bab7d6ada56e15467370">socket</a> = <a class="code" href="namespacerouting.html#aee51d4e36a57bab7d6ada56e15467370">routing::socket</a>();</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="keywordflow">if</span> (socket.<a class="code" href="classTry.html#a0b98f95163b8a38daafd1651b043a276">isError</a>()) {</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(socket.<a class="code" href="classTry.html#aec4a11ddd3c036e889d90b7eb6258ba7">error</a>());</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  }</div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span> 60;</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <span class="comment">// Dump all the libnl filters (i.e., rtnl_cls) attached to the given</span></div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="comment">// parent on the link.</span></div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <span class="keyword">struct </span>nl_cache* c = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  <span class="keywordtype">int</span> <a class="code" href="namespacemesos_1_1internal_1_1slave_1_1cni_1_1spec.html#ae58e703656ab4a1bd5d9870441236727">error</a> = rtnl_cls_alloc_cache(</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  socket.<a class="code" href="classTry.html#a8bc7f43e75a47111ea18e9c83b007be5">get</a>().get(),</div><div class="line"><a name="l00306"></a><sp an class="lineno"> 306</span>  rtnl_link_get_ifindex(link.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>()),</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  filter.<a class="code" href="structrouting_1_1filter_1_1Filter.html#a1d9edaaa4c966eb667709552529ec229">parent</a>.get(),</div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  &c);</div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span> </div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keywordflow">if</span> (error != 0) {</div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  <span class="stringliteral">" Failed to get filter info from kernel: "</span> +</div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  std::string(nl_geterror(error)));</div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  }</div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span> </div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <a class="code" href="classrouting_1_1Netlink.html">Netlink<struct nl_cache></a> cache(c);</div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span> </div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="comment">// A map from priority to the corresponding 'htid'.</span></div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  <a class="code" href="classhashmap.html">hashmap<uint16_t, uint32_t></a> htids;</div><div class="line"><a name="l00 320"></a><span class="lineno"> 320</span> </div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="comment">// A map from 'htid' to a set of already used nodes.</span></div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <a class="code" href="classhashmap.html">hashmap<uint32_t, hashset<uint32_t></a>> nodes;</div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span> </div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <span class="keywordflow">for</span> (<span class="keyword">struct</span> nl_object* o = nl_cache_get_first(cache.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>());</div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  o != <span class="keyword">nullptr</span>; o = nl_cache_get_next(o)) {</div><div class="line"><a name="l00326"></a>< span class="lineno"> 326</span>  <span class="keyword">struct </span>rtnl_cls* cls = (<span class="keyword">struct </span>rtnl_cls*) o;</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span> </div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="comment">// Only look at u32 filters. For other type of filters, their</span></div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  <span class="comment">// handles are generated by the kernel correctly.</span></div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  <span class="keywordflow">if</span> (rtnl_tc_get_kind(TC_CAST(cls)) == std::string(<span class="stringliteral">"u32"</span>)) {</div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <a class="code" href="classrouting_1_1filter_1_1U32Handle.html">U32Handle</a> handle(rtnl_tc_get_handle(TC_CAS T(cls)));</div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span> </div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  htids[rtnl_cls_get_prio(cls)] = handle.<a class="code" href="classrouting_1_1filter_1_1U32Handle.html#ab44fcf8caf8121f8873dc78702f3ca78">htid</a>();</div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  nodes[handle.<a class="code" href="classrouting_1_1filter_1_1U32Handle.html#ab44fcf8caf8121f8873dc78702f3ca78">htid</a>()].insert(handle.<a class="code" href="classrouting_1_1filter_1_1U32Handle.html#a905f16da1073dbbced85293a1ed2a39f">node</a>());</div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  }</div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  }</div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span> </div><div class="line"><a name="l00338"></a><span class="lineno"> 3 38</span>  <span class="comment">// If this filter has a new priority, we need to let the kernel</span></div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  <span class="comment">// decide the handle because we don't know which 'htid' this</span></div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="comment">// priority will be associated with.</span></div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  <span class="keywordflow">if</span> (!htids.<a class="code" href="classhashmap.html#ac142b3f8b73c76d5d4545bbd299007e5">contains</a>(filter.<a class="code" href="structrouting_1_1filter_1_1Filter.html#a4092907cf26633122a73f1f6e2f5dea1">priority</a>.get().get())) {</div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  <span class="keywordflow">return</span> <a class="code" href="structNone.html">None</a>();</div><div class="line" ><a name="l00343"></a><span class="lineno"> 343</span>  }</div><div >class="line"><a name="l00344"></a><span class="lineno"> >344</span> </div><div class="line"><a name="l00345"></a><span >class="lineno"> 345</span>  <span class="comment">// NOTE: By default, >kernel will choose to use divisor 1, which</span></div><div class="line"><a >name="l00346"></a><span class="lineno"> 346</span>  <span >class="comment">// means all filters will be in hash bucket 0. Also, kernel >assigns</span></div><div class="line"><a name="l00347"></a><span >class="lineno"> 347</span>  <span class="comment">// node id starting >from 0x800 by default. Here, we keep the same</span></div><div >class="line"><a name="l00348"></a><span class="lineno"> 348</span>  ><span class="comment">// semantics as kernel.</span></div><div >class="line"><a name="l00349"></a><span class="lineno"> 349</span>  >uint32_t htid = htids[filter.<a class="code" >href="structrouting_1_1filter_1_1Filter. html#a4092907cf26633122a73f1f6e2f5dea1">priority</a>.get().get()];</div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  <span class="keywordflow">for</span> (uint32_t node = 0x800; node <= 0xfff; node++) {</div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="keywordflow">if</span> (!nodes[htid].<a class="code" href="namespacestrings.html#a269921757daf11096d3f5e02686f8444">contains</a>(node)) {</div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  <span class="keywordflow">return</span> <a class="code" href="classrouting_1_1filter_1_1U32Handle.html">U32Handle</a>(htid, 0x0, node);</div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  }</div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  }</div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span> </div><div class="line"><a name="l 00356"></a><span class="lineno"> 356</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">"No available handle exists"</span>);</div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span> }</div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span> </div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span> </div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span> <span class="comment">// Encodes a filter (in our representation) to a libnl filter</span></div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span> <span class="comment">// (rtnl_cls). We use template here so that it works for any type of</span></div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span> <span class="comment">// classifier.</span></div><div class="line"><a name="l00363"></a>< span class="lineno"> 363</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Classifier></div><div class="line"><a name="l00364"></a><span class="lineno"><a class="line" href="namespacerouting_1_1filter_1_1internal.html#a7224102d55d4a109145a2e41160828af"> 364</a></span> <a class="code" href="classTry.html">Try<Netlink<struct rtnl_cls></a>> <a class="code" href="namespacerouting_1_1filter_1_1internal.html#a7224102d55d4a109145a2e41160828af">encodeFilter</a>(</div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  <span class="keyword">const</span> <a class="code" href="classrouting_1_1Netlink.html">Netlink<struct rtnl_link></a>& link,</div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  <span class="keyword">const</span> <a class="code" href="structrouting_1_1filter_1_1Filter.html">Filter<Classifier></a>& <a class="code" href="namespaceproc ess.html#a3054d5443603436a6315f210a412cbbc">filter</a>)</div><div class="line"><a name="l00367"></a><span class="lineno"> 367</span> {</div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  <span class="keyword">struct </span>rtnl_cls* c = rtnl_cls_alloc();</div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  <span class="keywordflow">if</span> (c == <span class="keyword">nullptr</span>) {</div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">"Failed to allocate a libnl filter (rtnl_cls)"</span>);</div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  }</div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span> </div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  <a class=" code" href="classrouting_1_1Netlink.html">Netlink<struct rtnl_cls></a> cls(c);</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span> </div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  rtnl_tc_set_link(TC_CAST(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>()), link.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>());</div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  rtnl_tc_set_parent(TC_CAST(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>()), filter.<a class="code" href="structrouting_1_1filter_1_1Filter.html#a1d9edaaa4c966eb667709552529ec229">parent</a>.get());</div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span> </div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <span cl ass="comment">// Encode the priority.</span></div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <span class="keywordflow">if</span> (filter.<a class="code" href="structrouting_1_1filter_1_1Filter.html#a4092907cf26633122a73f1f6e2f5dea1">priority</a>.isSome()) {</div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  rtnl_cls_set_prio(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>(), filter.<a class="code" href="structrouting_1_1filter_1_1Filter.html#a4092907cf26633122a73f1f6e2f5dea1">priority</a>.get().get());</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  }</div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span> </div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  <span class="comment">// Encode the classifier using the classifier specific function.</span></div><div class= "line"><a name="l00384"></a><span class="lineno"> 384</span>  <a class="code" href="classTry.html">Try<Nothing></a> encoding = <a class="code" href="namespacerouting_1_1filter_1_1internal.html#af143a877c566cca8dacc77d3b64f3372">encode</a>(cls, filter.<a class="code" href="structrouting_1_1filter_1_1Filter.html#ad87174eef00793486123325982027d12">classifier</a>);</div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <span class="keywordflow">if</span> (encoding.isError()) {</div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">"Failed to encode the classifier "</span> + encoding.error());</div><div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  }</div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span> </div><div class="line"><a na me="l00389"></a><span class="lineno"> 389</span>  <span class="comment">// Attach actions to the libnl filter.</span></div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  <span class="keywordflow">foreach</span> (<span class="keyword">const</span> <a class="code" href="classprocess_1_1Shared.html">process::Shared<action::Action></a>& action, filter.<a class="code" href="structrouting_1_1filter_1_1Filter.html#a86f603caae29c42efdc6184e01516e90">actions</a>) {</div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  <a class="code" href="classTry.html">Try<Nothing></a> attaching = <a class="code" href="namespacerouting_1_1filter_1_1internal.html#a3ae22bb34cae1ea9e5d0a30cafeb0d4f">attach</a>(cls, action);</div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  <span class="keywordflow">if</span> (attaching.<a class="code" href="classTry.html#a0b98f95163b8a38daafd1651b043a2 76">isError</a>()) {</div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">"Failed to attach an action "</span> + attaching.<a class="code" href="classTry.html#aec4a11ddd3c036e889d90b7eb6258ba7">error</a>());</div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  }</div><div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  }</div><div class="line"><a name="l00396"></a><span class="lineno"> 396</span> </div><div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  <span class="comment">// Encode the handle.</span></div><div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  <span class="keywordflow">if</span> (filter.<a class="code" href="structrouting_1_1filter_1_1Filter.html#acfe994fed2fd67ec52ddc877604a8d5f">handl e</a>.isSome()) {</div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  rtnl_tc_set_handle(TC_CAST(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>()), filter.<a class="code" href="structrouting_1_1filter_1_1Filter.html#acfe994fed2fd67ec52ddc877604a8d5f">handle</a>.get().get());</div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  <span class="comment">// NOTE: This is a workaround for MESOS-1617. Normally, if the</span></div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  <span class="comment">// user does not specify the handle for a filter, the kernel will</span></div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <span class="comment">// generate one automatically. However , for u32 filters, the</span></div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  <span class="comment">// existing kernel is buggy in the sense that it will generate a</span></div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <span class="comment">// handle that is already used by some other u32 filter (see the</span></div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  <span class="comment">// ticket for details). To address that, we explicitly set the</span></div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  <span class="comment">// handle of the filter by picking an unused handle.</span></div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  <span class="comment">// TODO(jieyu): Revisit this once the kernel bug is fixed.</span></div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  ; <span class="keywordflow">if</span> (rtnl_tc_get_kind(TC_CAST(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>())) == std::string(<span class="stringliteral">"u32"</span>)) {</div><div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  <a class="code" href="classResult.html">Result<U32Handle></a> handle = <a class="code" href="namespacerouting_1_1filter_1_1internal.html#a7ec08111c4aad6403bc92588f71bc3a6">generateU32Handle</a>(link, filter);</div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  <span class="keywordflow">if</span> (handle.<a class="code" href="classResult.html#aeca16ad17d299ad885c9b46c83b12a3d">isError</a>()) {</div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">"Failed to find a n unused u32 handle: "</span> + handle.<a class="code" href="classResult.html#a521adf96f5c27d26d6b1d580aae8aaee">error</a>());</div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  }</div><div class="line"><a name="l00414"></a><span class="lineno"> 414</span> </div><div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  <span class="comment">// If 'handle' is none, let the kernel choose the handle.</span></div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  <span class="keywordflow">if</span> (handle.<a class="code" href="classResult.html#a85eaa52037223d71092e65701c166562">isSome</a>()) {</div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  rtnl_tc_set_handle(TC_CAST(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>()), handle.<a class="code" href="classResult.html#aedf79f3b14dcda57 91b84a64ada4d412">get</a>().get());</div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  }</div><div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  }</div><div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  }</div><div class="line"><a name="l00421"></a><span class="lineno"> 421</span> </div><div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  <span class="comment">// Set the classid if needed.</span></div><div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <span class="keywordflow">if</span> (filter.<a class="code" href="structrouting_1_1filter_1_1Filter.html#a2a214d608fe4304177f60a66e0aba9a6">classid</a>.isSome()) {</div><div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  <span class="keywordflow">if</span> (rtnl_tc_get_kind(TC_CAST(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe549 0b33b471783504b5f89e">get</a>())) == std::string(<span class="stringliteral">"u32"</span>)) {</div><div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  rtnl_u32_set_classid(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>(), filter.<a class="code" href="structrouting_1_1filter_1_1Filter.html#a2a214d608fe4304177f60a66e0aba9a6">classid</a>.get().get());</div><div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (rtnl_tc_get_kind(TC_CAST(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>())) == std::string(<span class="stringliteral">"basic"</span>)) {</div><div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  rtnl_basic_set_target(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783 504b5f89e">get</a>(), filter.<a class="code" href="structrouting_1_1filter_1_1Filter.html#a2a214d608fe4304177f60a66e0aba9a6">classid</a>.get().get());</div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  }</div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  }</div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span> </div><div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  <span class="keywordflow">return</span> cls;</div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span> }</div><div class="line"><a name="l00433"></a><span class="lineno"> 433</span> </div><div class="line"><a name="l00434"></a><span class="lineno"> 434</span> </div><div class="line"><a name="l00435"></a><span class="lineno"> 435</span> <span class="comment">// Decodes a libnl filter (rtnl_cls) to our filter representation.</span></div><div class="line">< a name="l00436"></a><span class="lineno"> 436</span> <span class="comment">// Returns None if the libnl filter does not match the specified</span></div><div class="line"><a name="l00437"></a><span class="lineno"> 437</span> <span class="comment">// classifier type. We use template here so that it works for any type</span></div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span> <span class="comment">// of classifier.</span></div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Classifier></div><div class="line"><a name="l00440"></a><span class="lineno"><a class="line" href="namespacerouting_1_1filter_1_1internal.html#ac09b47f64cdfd8d7e25671b7c1f657f8"> 440</a></span> <a class="code" href="classResult.html">Result<Filter<Classifier></a>> <a class="code" href="namespacerouting_1_1filter_1_1internal.html#ac09b47f64cdfd8d 7e25671b7c1f657f8">decodeFilter</a>(<span class="keyword">const</span> <a class="code" href="classrouting_1_1Netlink.html">Netlink<struct rtnl_cls></a>& cls)</div><div class="line"><a name="l00441"></a><span class="lineno"> 441</span> {</div><div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  <span class="comment">// If the handle of the libnl filer is 0, it means that it is an</span></div><div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  <span class="comment">// internal filter, therefore is definitely not created by us.</span></div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  <span class="keywordflow">if</span> (rtnl_tc_get_handle(TC_CAST(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>())) == 0) {</div><div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  <span class="keywordflow">return</span> <a class="code" href="structNone.html">None</a>();</div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  }</div><div class="line"><a name="l00447"></a><span class="lineno"> 447</span> </div><div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  <span class="comment">// Decode the parent.</span></div><div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  <a class="code" href="classrouting_1_1Handle.html">Handle</a> parent(rtnl_tc_get_parent(TC_CAST(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>())));</div><div class="line"><a name="l00450"></a><span class="lineno"> 450</span> </div><div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <span class="comment">// Decode the priority. If the priority is not specified by the</span></div><div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  <span cla ss="comment">// user, kernel will assign a priority to the filter. So we should</span></div><div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  <span class="comment">// always have a valid priority here.</span></div><div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  <a class="code" href="classrouting_1_1filter_1_1Priority.html">Priority</a> priority(rtnl_cls_get_prio(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>()));</div><div class="line"><a name="l00455"></a><span class="lineno"> 455</span> </div><div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  <span class="comment">// Decode the handle. If the handle is not specified by the user,</span></div><div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  <span class="comment">// kernel will assign a handle to the filter. So we should always</span></div><div class="line"> <a name="l00458"></a><span class="lineno"> 458</span>  <span class="comment">// have a valid handle here.</span></div><div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  <a class="code" href="classrouting_1_1Handle.html">Handle</a> handle(rtnl_tc_get_handle(TC_CAST(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>())));</div><div class="line"><a name="l00460"></a><span class="lineno"> 460</span> </div><div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  <span class="comment">// Decode the classifier using a classifier specific function.</span></div><div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  <a class="code" href="classResult.html">Result<Classifier></a> classifier = decode<Classifier>(cls);</div><div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  <span class="keywordflow">if</span> (classifier. isError()) {</div><div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">"Failed to decode the classifier: "</span> + classifier.error());</div><div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (classifier.isNone()) {</div><div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  <span class="keywordflow">return</span> <a class="code" href="structNone.html">None</a>();</div><div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  }</div><div class="line"><a name="l00468"></a><span class="lineno"> 468</span> </div><div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  <a class="code" href="classOption.html">Option<Handle></a> <a class="code" href ="namespacecgroups_1_1net__cls.html#a4be3a8048a2534d857fc1ba1aac7c5ea">classid</a>;</div><div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  <span class="keywordflow">if</span> (rtnl_tc_get_kind(TC_CAST(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>())) == std::string(<span class="stringliteral">"u32"</span>)) {</div><div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  uint32_t _classid;</div><div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  <span class="keywordflow">if</span> (rtnl_u32_get_classid(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>(), &_classid) == 0) {</div><div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  classid = _classid;</div><div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  }</div><div class="line "><a name="l00475"></a><span class="lineno"> 475</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (rtnl_tc_get_kind(TC_CAST(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>())) == std::string(<span class="stringliteral">"basic"</span>)) {</div><div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  classid = rtnl_basic_get_target(cls.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>());</div><div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  }</div><div class="line"><a name="l00478"></a><span class="lineno"> 478</span> </div><div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  <span class="comment">// TODO(jieyu): Decode all the actions attached to the filter.</span></div><div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  <sp an class="comment">// Currently, libnl does not support that (but will support that in</span></div><div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  <span class="comment">// the future).</span></div><div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  <span class="keywordflow">return</span> <a class="code" href="structrouting_1_1filter_1_1Filter.html">Filter<Classifier></a>(parent,</div><div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  classifier.get(),</div><div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  priority,</div><div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  handle,</div><div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  <a class="code" href="namespacecgroups_1_1net__cls.html#a4be3a8048a25 34d857fc1ba1aac7c5ea">classid</a>);</div><div class="line"><a name="l00487"></a><span class="lineno"> 487</span> }</div><div class="line"><a name="l00488"></a><span class="lineno"> 488</span> </div><div class="line"><a name="l00490"></a><span class="lineno"> 490</span> <span class="comment">// Helpers for internal APIs.</span></div><div class="line"><a name="l00492"></a><span class="lineno"> 492</span> <span class="comment"></span></div><div class="line"><a name="l00493"></a><span class="lineno"> 493</span> <span class="comment">// Returns all the libnl filters (rtnl_cls) attached to the given</span></div><div class="line"><a name="l00494"></a><span class="lineno"> 494</span> <span class="comment">// parent on the link.</span></div><div class="line"><a name="l00495"></a><span class="lineno"><a class="line" href="namespacerouting_1_1filter_1_1internal.html#ade9782606fb459eb486de4c77b2c0c8a"> 495</a></span> <span class="keyword">inline</span> <a class="code" href="classTry.html">Try<std::vector<Netlink<struct rtnl_cls></a>>> <a class="code" href="namespacerouting_1_1filter_1_1internal.html#ade9782606fb459eb486de4c77b2c0c8a">getClses</a>(</div><div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  <span class="keyword">const</span> <a class="code" href="classrouting_1_1Netlink.html">Netlink<struct rtnl_link></a>& link,</div><div class="line"><a name="l00497"></a><span class="lineno"> 497</span>  <span class="keyword">const</span> <a class="code" href="classrouting_1_1Handle.html">Handle</a>& parent)</div><div class="line"><a name="l00498"></a><span class="lineno"> 498</span> {</div><div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  <a class="code" href="classTry.html">Try<Netlink<struct nl_sock></a>> <a class="code" href="namespacerouting.html#aee51d4e36a57bab7d6ada56e15467370">socket</a> = <a class="code" hr ef="namespacerouting.html#aee51d4e36a57bab7d6ada56e15467370">routing::socket</a>();</div><div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  <span class="keywordflow">if</span> (socket.<a class="code" href="classTry.html#a0b98f95163b8a38daafd1651b043a276">isError</a>()) {</div><div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(socket.<a class="code" href="classTry.html#aec4a11ddd3c036e889d90b7eb6258ba7">error</a>());</div><div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  }</div><div class="line"><a name="l00503"></a><span class="lineno"> 503</span> </div><div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  <span class="comment">// Dump all the libnl filters (i.e., rtnl_cls) attached to the given</span></div><div class="line"><a name="l00505"></a><span class="lineno"> 505</sp an>  <span class="comment">// parent on the link.</span></div><div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  <span class="keyword">struct </span>nl_cache* c = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  <span class="keywordtype">int</span> <a class="code" href="namespacemesos_1_1internal_1_1slave_1_1cni_1_1spec.html#ae58e703656ab4a1bd5d9870441236727">error</a> = rtnl_cls_alloc_cache(</div><div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  socket.<a class="code" href="classTry.html#a8bc7f43e75a47111ea18e9c83b007be5">get</a>().get(),</div><div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  rtnl_link_get_ifindex(link.<a class="code" href="classrouting_1_1Netlink.html#aed276efbe5490b33b471783504b5f89e">get</a>()),</div><div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  paren t.<a class="code" href="classrouting_1_1Handle.html#aaaf5d48afa385557421c29db03c27caf">get</a>(),</div><div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  &c);</div><div class="line"><a name="l00512"></a><span class="lineno"> 512</span> </div><div class="line"><a name="l00513"></a><span class="lineno"> 513</span>  <span class="keywordflow">if</span> (error != 0) {</div><div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(</div><div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  <span class="stringliteral">"Failed to get filter info from kernel: "</span> +</div><div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  std::string(nl_geterror(error)));</div><div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  }</div><div cl ass="line"><a name="l00518"></a><span class="lineno"> 518</span> </div><div class="line"><a name="l00519"></a><span class="lineno"> 519</span>  <a class="
<TRUNCATED>
