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  66   <h1>Source code for nepi.resources.linux.route</h1><div class="highlight"><pre>
  67 <span class="c">#</span>
  68 <span class="c">#    NEPI, a framework to manage network experiments</span>
  69 <span class="c">#    Copyright (C) 2014 INRIA</span>
  70 <span class="c">#</span>
  71 <span class="c">#    This program is free software: you can redistribute it and/or modify</span>
  72 <span class="c">#    it under the terms of the GNU General Public License version 2 as</span>
  73 <span class="c">#    published by the Free Software Foundation;</span>
  74 <span class="c">#</span>
  75 <span class="c">#    This program is distributed in the hope that it will be useful,</span>
  76 <span class="c">#    but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
  77 <span class="c">#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span>
  78 <span class="c">#    GNU General Public License for more details.</span>
  79 <span class="c">#</span>
  80 <span class="c">#    You should have received a copy of the GNU General Public License</span>
  81 <span class="c">#    along with this program.  If not, see &lt;http://www.gnu.org/licenses/&gt;.</span>
  82 <span class="c">#</span>
  83 <span class="c"># Author: Alina Quereilhac &lt;alina.quereilhac@inria.fr&gt;</span>
  84
  85 <span class="kn">from</span> <span class="nn">nepi.execution.attribute</span> <span class="kn">import</span> <span class="n">Attribute</span><span class="p">,</span> <span class="n">Flags</span><span class="p">,</span> <span class="n">Types</span>
  86 <span class="kn">from</span> <span class="nn">nepi.execution.resource</span> <span class="kn">import</span> <span class="n">clsinit_copy</span><span class="p">,</span> <span class="n">ResourceState</span>
  87 <span class="kn">from</span> <span class="nn">nepi.resources.linux.application</span> <span class="kn">import</span> <span class="n">LinuxApplication</span>
  88
  89 <span class="kn">import</span> <span class="nn">os</span>
  90
  91 <span class="nd">@clsinit_copy</span>
  92 <div class="viewcode-block" id="LinuxRoute"><a class="viewcode-back" href="../../../../_layout/nepi.resources.linux.html#nepi.resources.linux.route.LinuxRoute">[docs]</a><span class="k">class</span> <span class="nc">LinuxRoute</span><span class="p">(</span><span class="n">LinuxApplication</span><span class="p">):</span>
  93     <span class="n">_rtype</span> <span class="o">=</span> <span class="s">&quot;linux::Route&quot;</span>
  94     <span class="n">_help</span> <span class="o">=</span> <span class="s">&quot;Adds a route to the host using iptools &quot;</span>
  95
  96     <span class="nd">@classmethod</span>
  97     <span class="k">def</span> <span class="nf">_register_attributes</span><span class="p">(</span><span class="n">cls</span><span class="p">):</span>
  98         <span class="n">network</span> <span class="o">=</span> <span class="n">Attribute</span><span class="p">(</span><span class="s">&quot;network&quot;</span><span class="p">,</span> <span class="s">&quot;Network address&quot;</span><span class="p">,</span> <span class="n">flags</span><span class="o">=</span><span class="n">Flags</span><span class="o">.</span><span class="n">Design</span><span class="p">)</span>
  99         <span class="n">prefix</span> <span class="o">=</span> <span class="n">Attribute</span><span class="p">(</span><span class="s">&quot;prefix&quot;</span><span class="p">,</span> <span class="s">&quot;IP prefix length&quot;</span><span class="p">,</span> <span class="n">flags</span><span class="o">=</span><span class="n">Flags</span><span class="o">.</span><span class="n">Design</span><span class="p">)</span>
 100         <span class="n">nexthop</span> <span class="o">=</span> <span class="n">Attribute</span><span class="p">(</span><span class="s">&quot;nexthop&quot;</span><span class="p">,</span> <span class="s">&quot;Nexthop IP&quot;</span><span class="p">,</span> <span class="n">flags</span><span class="o">=</span><span class="n">Flags</span><span class="o">.</span><span class="n">Design</span><span class="p">)</span>
 101
 102         <span class="n">cls</span><span class="o">.</span><span class="n">_register_attribute</span><span class="p">(</span><span class="n">network</span><span class="p">)</span>
 103         <span class="n">cls</span><span class="o">.</span><span class="n">_register_attribute</span><span class="p">(</span><span class="n">prefix</span><span class="p">)</span>
 104         <span class="n">cls</span><span class="o">.</span><span class="n">_register_attribute</span><span class="p">(</span><span class="n">nexthop</span><span class="p">)</span>
 105
 106     <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">ec</span><span class="p">,</span> <span class="n">guid</span><span class="p">):</span>
 107         <span class="nb">super</span><span class="p">(</span><span class="n">LinuxRoute</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="n">ec</span><span class="p">,</span> <span class="n">guid</span><span class="p">)</span>
 108         <span class="bp">self</span><span class="o">.</span><span class="n">_home</span> <span class="o">=</span> <span class="s">&quot;route-</span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="bp">self</span><span class="o">.</span><span class="n">guid</span>
 109         <span class="bp">self</span><span class="o">.</span><span class="n">_device</span> <span class="o">=</span> <span class="bp">None</span>
 110
 111     <span class="nd">@property</span>
 112 <div class="viewcode-block" id="LinuxRoute.device"><a class="viewcode-back" href="../../../../_layout/nepi.resources.linux.html#nepi.resources.linux.route.LinuxRoute.device">[docs]</a>    <span class="k">def</span> <span class="nf">device</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 113         <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_device</span><span class="p">:</span>
 114             <span class="kn">from</span> <span class="nn">nepi.resources.linux.tap</span> <span class="kn">import</span> <span class="n">LinuxTap</span>
 115             <span class="kn">from</span> <span class="nn">nepi.resources.linux.tun</span> <span class="kn">import</span> <span class="n">LinuxTun</span>
 116             <span class="kn">from</span> <span class="nn">nepi.resources.linux.interface</span> <span class="kn">import</span> <span class="n">LinuxInterface</span>
 117             <span class="n">tap</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_connected</span><span class="p">(</span><span class="n">LinuxTap</span><span class="o">.</span><span class="n">get_rtype</span><span class="p">())</span>
 118             <span class="n">tun</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_connected</span><span class="p">(</span><span class="n">LinuxTun</span><span class="o">.</span><span class="n">get_rtype</span><span class="p">())</span>
 119             <span class="n">interface</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_connected</span><span class="p">(</span><span class="n">LinuxInterface</span><span class="o">.</span><span class="n">get_rtype</span><span class="p">())</span>
 120             <span class="k">if</span> <span class="n">tap</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_device</span> <span class="o">=</span> <span class="n">tap</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
 121             <span class="k">elif</span> <span class="n">tun</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_device</span> <span class="o">=</span> <span class="n">tun</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
 122             <span class="k">elif</span> <span class="n">interface</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_device</span> <span class="o">=</span> <span class="n">interface</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
 123             <span class="k">else</span><span class="p">:</span>
 124                 <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">,</span> <span class="s">&quot;linux::Routes must be connected to a &quot;</span>\
 125                         <span class="s">&quot;linux::TAP, linux::TUN, or linux::Interface&quot;</span>
 126         <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_device</span>
 127 </div>
 128     <span class="nd">@property</span>
 129 <div class="viewcode-block" id="LinuxRoute.node"><a class="viewcode-back" href="../../../../_layout/nepi.resources.linux.html#nepi.resources.linux.route.LinuxRoute.node">[docs]</a>    <span class="k">def</span> <span class="nf">node</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 130         <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="o">.</span><span class="n">node</span>
 131 </div>
 132 <div class="viewcode-block" id="LinuxRoute.upload_start_command"><a class="viewcode-back" href="../../../../_layout/nepi.resources.linux.html#nepi.resources.linux.route.LinuxRoute.upload_start_command">[docs]</a>    <span class="k">def</span> <span class="nf">upload_start_command</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 133         <span class="c"># We want to make sure the route is configured</span>
 134         <span class="c"># before the deploy is over, so we execute the </span>
 135         <span class="c"># start script now and wait until it finishes. </span>
 136         <span class="n">command</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;command&quot;</span><span class="p">)</span>
 137         <span class="n">command</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">replace_paths</span><span class="p">(</span><span class="n">command</span><span class="p">)</span>
 138
 139         <span class="n">shfile</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">app_home</span><span class="p">,</span> <span class="s">&quot;start.sh&quot;</span><span class="p">)</span>
 140         <span class="bp">self</span><span class="o">.</span><span class="n">node</span><span class="o">.</span><span class="n">run_and_wait</span><span class="p">(</span><span class="n">command</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">run_home</span><span class="p">,</span>
 141             <span class="n">shfile</span> <span class="o">=</span> <span class="n">shfile</span><span class="p">,</span>
 142             <span class="n">overwrite</span> <span class="o">=</span> <span class="bp">True</span><span class="p">)</span>
 143 </div>
 144 <div class="viewcode-block" id="LinuxRoute.upload_sources"><a class="viewcode-back" href="../../../../_layout/nepi.resources.linux.html#nepi.resources.linux.route.LinuxRoute.upload_sources">[docs]</a>    <span class="k">def</span> <span class="nf">upload_sources</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 145         <span class="c"># upload stop.sh script</span>
 146         <span class="n">stop_command</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">replace_paths</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_stop_command</span><span class="p">)</span>
 147
 148         <span class="bp">self</span><span class="o">.</span><span class="n">node</span><span class="o">.</span><span class="n">upload</span><span class="p">(</span><span class="n">stop_command</span><span class="p">,</span>
 149                 <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">app_home</span><span class="p">,</span> <span class="s">&quot;stop.sh&quot;</span><span class="p">),</span>
 150                 <span class="n">text</span> <span class="o">=</span> <span class="bp">True</span><span class="p">,</span>
 151                 <span class="c"># Overwrite file every time. </span>
 152                 <span class="c"># The stop.sh has the path to the socket, which should change</span>
 153                 <span class="c"># on every experiment run.</span>
 154                 <span class="n">overwrite</span> <span class="o">=</span> <span class="bp">True</span><span class="p">)</span>
 155 </div>
 156 <div class="viewcode-block" id="LinuxRoute.do_deploy"><a class="viewcode-back" href="../../../../_layout/nepi.resources.linux.html#nepi.resources.linux.route.LinuxRoute.do_deploy">[docs]</a>    <span class="k">def</span> <span class="nf">do_deploy</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 157         <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">device</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="o">.</span><span class="n">state</span> <span class="o">&lt;</span> <span class="n">ResourceState</span><span class="o">.</span><span class="n">PROVISIONED</span><span class="p">:</span>
 158             <span class="bp">self</span><span class="o">.</span><span class="n">ec</span><span class="o">.</span><span class="n">schedule</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">reschedule_delay</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">deploy</span><span class="p">)</span>
 159         <span class="k">else</span><span class="p">:</span>
 160             <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;command&quot;</span><span class="p">):</span>
 161                 <span class="bp">self</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s">&quot;command&quot;</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">_start_command</span><span class="p">)</span>
 162
 163             <span class="bp">self</span><span class="o">.</span><span class="n">do_discover</span><span class="p">()</span>
 164             <span class="bp">self</span><span class="o">.</span><span class="n">do_provision</span><span class="p">()</span>
 165
 166             <span class="bp">self</span><span class="o">.</span><span class="n">set_ready</span><span class="p">()</span>
 167 </div>
 168 <div class="viewcode-block" id="LinuxRoute.do_start"><a class="viewcode-back" href="../../../../_layout/nepi.resources.linux.html#nepi.resources.linux.route.LinuxRoute.do_start">[docs]</a>    <span class="k">def</span> <span class="nf">do_start</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 169         <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">state</span> <span class="o">==</span> <span class="n">ResourceState</span><span class="o">.</span><span class="n">READY</span><span class="p">:</span>
 170             <span class="n">command</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;command&quot;</span><span class="p">)</span>
 171             <span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s">&quot;Starting command &#39;</span><span class="si">%s</span><span class="s">&#39;&quot;</span> <span class="o">%</span> <span class="n">command</span><span class="p">)</span>
 172
 173             <span class="bp">self</span><span class="o">.</span><span class="n">set_started</span><span class="p">()</span>
 174         <span class="k">else</span><span class="p">:</span>
 175             <span class="n">msg</span> <span class="o">=</span> <span class="s">&quot; Failed to execute command &#39;</span><span class="si">%s</span><span class="s">&#39;&quot;</span> <span class="o">%</span> <span class="n">command</span>
 176             <span class="bp">self</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="n">msg</span><span class="p">,</span> <span class="n">out</span><span class="p">,</span> <span class="n">err</span><span class="p">)</span>
 177             <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">,</span> <span class="n">msg</span>
 178 </div>
 179 <div class="viewcode-block" id="LinuxRoute.do_stop"><a class="viewcode-back" href="../../../../_layout/nepi.resources.linux.html#nepi.resources.linux.route.LinuxRoute.do_stop">[docs]</a>    <span class="k">def</span> <span class="nf">do_stop</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 180         <span class="n">command</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&#39;command&#39;</span><span class="p">)</span> <span class="ow">or</span> <span class="s">&#39;&#39;</span>
 181
 182         <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">state</span> <span class="o">==</span> <span class="n">ResourceState</span><span class="o">.</span><span class="n">STARTED</span><span class="p">:</span>
 183             <span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s">&quot;Stopping command &#39;</span><span class="si">%s</span><span class="s">&#39;&quot;</span> <span class="o">%</span> <span class="n">command</span><span class="p">)</span>
 184
 185             <span class="n">command</span> <span class="o">=</span> <span class="s">&quot;bash </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">app_home</span><span class="p">,</span> <span class="s">&quot;stop.sh&quot;</span><span class="p">)</span>
 186             <span class="p">(</span><span class="n">out</span><span class="p">,</span> <span class="n">err</span><span class="p">),</span> <span class="n">proc</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">execute_command</span><span class="p">(</span><span class="n">command</span><span class="p">,</span>
 187                     <span class="n">blocking</span> <span class="o">=</span> <span class="bp">True</span><span class="p">)</span>
 188
 189             <span class="k">if</span> <span class="n">err</span><span class="p">:</span>
 190                 <span class="n">msg</span> <span class="o">=</span> <span class="s">&quot; Failed to stop command &#39;</span><span class="si">%s</span><span class="s">&#39; &quot;</span> <span class="o">%</span> <span class="n">command</span>
 191                 <span class="bp">self</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="n">msg</span><span class="p">,</span> <span class="n">out</span><span class="p">,</span> <span class="n">err</span><span class="p">)</span>
 192
 193             <span class="bp">self</span><span class="o">.</span><span class="n">set_stopped</span><span class="p">()</span>
 194 </div>
 195     <span class="nd">@property</span>
 196     <span class="k">def</span> <span class="nf">_start_command</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 197         <span class="n">network</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;network&quot;</span><span class="p">)</span>
 198         <span class="n">prefix</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;prefix&quot;</span><span class="p">)</span>
 199         <span class="n">nexthop</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;nexthop&quot;</span><span class="p">)</span>
 200         <span class="n">devicename</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;deviceName&quot;</span><span class="p">)</span>
 201
 202         <span class="n">command</span> <span class="o">=</span> <span class="p">[]</span>
 203         <span class="n">command</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s">&quot;sudo -S ip route add </span><span class="si">%s</span><span class="s">/</span><span class="si">%s</span><span class="s"> </span><span class="si">%s</span><span class="s"> dev </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span>
 204             <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;network&quot;</span><span class="p">),</span>
 205             <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;prefix&quot;</span><span class="p">),</span>
 206             <span class="s">&quot;default&quot;</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">nexthop</span> <span class="k">else</span> <span class="s">&quot;via </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">nexthop</span><span class="p">,</span>
 207             <span class="n">devicename</span><span class="p">))</span>
 208
 209         <span class="k">return</span> <span class="s">&quot; &quot;</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">command</span><span class="p">)</span>
 210
 211     <span class="nd">@property</span>
 212     <span class="k">def</span> <span class="nf">_stop_command</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 213         <span class="n">network</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;network&quot;</span><span class="p">)</span>
 214         <span class="n">prefix</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;prefix&quot;</span><span class="p">)</span>
 215         <span class="n">nexthop</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;nexthop&quot;</span><span class="p">)</span>
 216         <span class="n">devicename</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;deviceName&quot;</span><span class="p">)</span>
 217
 218         <span class="n">command</span> <span class="o">=</span> <span class="p">[]</span>
 219         <span class="n">command</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s">&quot;sudo -S ip route del </span><span class="si">%s</span><span class="s">/</span><span class="si">%s</span><span class="s"> </span><span class="si">%s</span><span class="s"> dev </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span>
 220             <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;network&quot;</span><span class="p">),</span>
 221             <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;prefix&quot;</span><span class="p">),</span>
 222             <span class="s">&quot;default&quot;</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">nexthop</span> <span class="k">else</span> <span class="s">&quot;via </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">nexthop</span><span class="p">,</span>
 223             <span class="n">devicename</span><span class="p">))</span>
 224
 225         <span class="k">return</span> <span class="s">&quot; &quot;</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">command</span><span class="p">)</span>
 226 </pre></div></div>
 227
 228           </div>
 229         </div>
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