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  66   <h1>Source code for nepi.resources.linux.ns3.tuntapfdlink</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 <span class="kn">from</span> <span class="nn">nepi.execution.resource</span> <span class="kn">import</span> <span class="n">ResourceState</span><span class="p">,</span> <span class="n">clsinit_copy</span>
  85 <span class="kn">from</span> <span class="nn">nepi.resources.linux.application</span> <span class="kn">import</span> <span class="n">LinuxApplication</span>
  86
  87 <span class="kn">import</span> <span class="nn">base64</span>
  88 <span class="kn">import</span> <span class="nn">fcntl</span>
  89 <span class="kn">import</span> <span class="nn">os</span>
  90 <span class="kn">import</span> <span class="nn">socket</span>
  91 <span class="kn">import</span> <span class="nn">struct</span>
  92
  93 <span class="nd">@clsinit_copy</span>
  94 <div class="viewcode-block" id="LinuxTunTapFdLink"><a class="viewcode-back" href="../../../../../_layout/nepi.resources.linux.ns3.html#nepi.resources.linux.ns3.tuntapfdlink.LinuxTunTapFdLink">[docs]</a><span class="k">class</span> <span class="nc">LinuxTunTapFdLink</span><span class="p">(</span><span class="n">LinuxApplication</span><span class="p">):</span>
  95     <span class="sd">&quot;&quot;&quot; Interconnects a TAP or TUN Linux device to a FdNetDevice</span>
  96 <span class="sd">    &quot;&quot;&quot;</span>
  97     <span class="n">_rtype</span> <span class="o">=</span> <span class="s">&quot;linux::ns3::TunTapFdLink&quot;</span>
  98
  99     <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>
 100         <span class="nb">super</span><span class="p">(</span><span class="n">LinuxTunTapFdLink</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>
 101         <span class="bp">self</span><span class="o">.</span><span class="n">_tap</span> <span class="o">=</span> <span class="bp">None</span>
 102         <span class="bp">self</span><span class="o">.</span><span class="n">_fdnetdevice</span> <span class="o">=</span> <span class="bp">None</span>
 103         <span class="bp">self</span><span class="o">.</span><span class="n">_fd_node</span> <span class="o">=</span> <span class="bp">None</span>
 104         <span class="bp">self</span><span class="o">.</span><span class="n">send_address</span> <span class="o">=</span> <span class="bp">None</span>
 105         <span class="bp">self</span><span class="o">.</span><span class="n">_home</span> <span class="o">=</span> <span class="s">&quot;tuntap-link-</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>
 106
 107     <span class="nd">@property</span>
 108 <div class="viewcode-block" id="LinuxTunTapFdLink.fdnetdevice"><a class="viewcode-back" href="../../../../../_layout/nepi.resources.linux.ns3.html#nepi.resources.linux.ns3.tuntapfdlink.LinuxTunTapFdLink.fdnetdevice">[docs]</a>    <span class="k">def</span> <span class="nf">fdnetdevice</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 109         <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_fdnetdevice</span><span class="p">:</span>
 110             <span class="kn">from</span> <span class="nn">nepi.resources.ns3.ns3fdnetdevice</span> <span class="kn">import</span> <span class="n">NS3BaseFdNetDevice</span>
 111             <span class="n">devices</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">NS3BaseFdNetDevice</span><span class="o">.</span><span class="n">get_rtype</span><span class="p">())</span>
 112             <span class="k">if</span> <span class="ow">not</span> <span class="n">devices</span> <span class="ow">or</span> <span class="nb">len</span><span class="p">(</span><span class="n">devices</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">1</span><span class="p">:</span>
 113                 <span class="n">msg</span> <span class="o">=</span> <span class="s">&quot;TunTapFdLink must be connected to exactly one FdNetDevice&quot;</span>
 114                 <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>
 115                 <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">,</span> <span class="n">msg</span>
 116
 117             <span class="bp">self</span><span class="o">.</span><span class="n">_fdnetdevice</span> <span class="o">=</span> <span class="n">devices</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
 118
 119             <span class="n">simu</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_fdnetdevice</span><span class="o">.</span><span class="n">simulation</span>
 120             <span class="kn">from</span> <span class="nn">nepi.resources.linux.node</span> <span class="kn">import</span> <span class="n">LinuxNode</span>
 121             <span class="n">nodes</span> <span class="o">=</span> <span class="n">simu</span><span class="o">.</span><span class="n">get_connected</span><span class="p">(</span><span class="n">LinuxNode</span><span class="o">.</span><span class="n">get_rtype</span><span class="p">())</span>
 122             <span class="bp">self</span><span class="o">.</span><span class="n">_fd_node</span> <span class="o">=</span> <span class="n">nodes</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
 123
 124         <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_fdnetdevice</span>
 125 </div>
 126     <span class="nd">@property</span>
 127 <div class="viewcode-block" id="LinuxTunTapFdLink.fdnode"><a class="viewcode-back" href="../../../../../_layout/nepi.resources.linux.ns3.html#nepi.resources.linux.ns3.tuntapfdlink.LinuxTunTapFdLink.fdnode">[docs]</a>    <span class="k">def</span> <span class="nf">fdnode</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 128         <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_fd_node</span>
 129 </div>
 130     <span class="nd">@property</span>
 131 <div class="viewcode-block" id="LinuxTunTapFdLink.tap"><a class="viewcode-back" href="../../../../../_layout/nepi.resources.linux.ns3.html#nepi.resources.linux.ns3.tuntapfdlink.LinuxTunTapFdLink.tap">[docs]</a>    <span class="k">def</span> <span class="nf">tap</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 132         <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_tap</span><span class="p">:</span>
 133             <span class="kn">from</span> <span class="nn">nepi.resources.linux.tap</span> <span class="kn">import</span> <span class="n">LinuxTap</span>
 134             <span class="n">devices</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>
 135             <span class="k">if</span> <span class="ow">not</span> <span class="n">devices</span> <span class="ow">or</span> <span class="nb">len</span><span class="p">(</span><span class="n">devices</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">1</span><span class="p">:</span>
 136                 <span class="n">msg</span> <span class="o">=</span> <span class="s">&quot;TunTapLink must be connected to exactly one Tap or Tun&quot;</span>
 137                 <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>
 138                 <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">,</span> <span class="n">msg</span>
 139
 140             <span class="bp">self</span><span class="o">.</span><span class="n">_tap</span> <span class="o">=</span> <span class="n">devices</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
 141
 142         <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_tap</span>
 143 </div>
 144     <span class="nd">@property</span>
 145 <div class="viewcode-block" id="LinuxTunTapFdLink.tapnode"><a class="viewcode-back" href="../../../../../_layout/nepi.resources.linux.ns3.html#nepi.resources.linux.ns3.tuntapfdlink.LinuxTunTapFdLink.tapnode">[docs]</a>    <span class="k">def</span> <span class="nf">tapnode</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 146         <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">tap</span><span class="o">.</span><span class="n">node</span>
 147 </div>
 148     <span class="nd">@property</span>
 149 <div class="viewcode-block" id="LinuxTunTapFdLink.node"><a class="viewcode-back" href="../../../../../_layout/nepi.resources.linux.ns3.html#nepi.resources.linux.ns3.tuntapfdlink.LinuxTunTapFdLink.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>
 150         <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">tapnode</span>
 151 </div>
 152 <div class="viewcode-block" id="LinuxTunTapFdLink.upload_sources"><a class="viewcode-back" href="../../../../../_layout/nepi.resources.linux.ns3.html#nepi.resources.linux.ns3.tuntapfdlink.LinuxTunTapFdLink.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>
 153         <span class="n">scripts</span> <span class="o">=</span> <span class="p">[]</span>
 154
 155         <span class="c"># vif-passfd python script</span>
 156         <span class="n">linux_passfd</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="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">dirname</span><span class="p">(</span><span class="n">__file__</span><span class="p">),</span>
 157                 <span class="s">&quot;..&quot;</span><span class="p">,</span>
 158                 <span class="s">&quot;scripts&quot;</span><span class="p">,</span>
 159                 <span class="s">&quot;linux-tap-passfd.py&quot;</span><span class="p">)</span>
 160
 161         <span class="n">scripts</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">linux_passfd</span><span class="p">)</span>
 162
 163         <span class="c"># Upload scripts</span>
 164         <span class="n">scripts</span> <span class="o">=</span> <span class="s">&quot;;&quot;</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">scripts</span><span class="p">)</span>
 165
 166         <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">scripts</span><span class="p">,</span>
 167                 <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">node</span><span class="o">.</span><span class="n">src_dir</span><span class="p">),</span>
 168                 <span class="n">overwrite</span> <span class="o">=</span> <span class="bp">False</span><span class="p">)</span>
 169 </div>
 170 <div class="viewcode-block" id="LinuxTunTapFdLink.upload_start_command"><a class="viewcode-back" href="../../../../../_layout/nepi.resources.linux.ns3.html#nepi.resources.linux.ns3.tuntapfdlink.LinuxTunTapFdLink.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>
 171         <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">tapnode</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;hostname&quot;</span><span class="p">)</span> <span class="o">!=</span> \
 172                 <span class="bp">self</span><span class="o">.</span><span class="n">fdnode</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;hostname&quot;</span><span class="p">):</span>
 173             <span class="n">msg</span> <span class="o">=</span> <span class="s">&quot;Tap and FdNetDevice are not in the same host&quot;</span>
 174             <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>
 175             <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">,</span> <span class="n">msg</span>
 176
 177         <span class="bp">self</span><span class="o">.</span><span class="n">send_address</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">fdnetdevice</span><span class="o">.</span><span class="n">recv_fd</span><span class="p">()</span>
 178         <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>
 179
 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">&quot;command&quot;</span><span class="p">)</span>
 181
 182         <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>
 183         <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>
 184                 <span class="n">shfile</span><span class="o">=</span><span class="n">shfile</span><span class="p">,</span>
 185                 <span class="n">wait_run</span><span class="o">=</span><span class="bp">False</span><span class="p">,</span>
 186                 <span class="n">overwrite</span><span class="o">=</span><span class="bp">True</span><span class="p">)</span>
 187         </div>
 188 <div class="viewcode-block" id="LinuxTunTapFdLink.do_deploy"><a class="viewcode-back" href="../../../../../_layout/nepi.resources.linux.ns3.html#nepi.resources.linux.ns3.tuntapfdlink.LinuxTunTapFdLink.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>
 189         <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">tap</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">READY</span> <span class="ow">or</span> \
 190                 <span class="bp">self</span><span class="o">.</span><span class="n">fdnetdevice</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">READY</span><span class="p">:</span>
 191             <span class="bp">self</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s">&quot;---- RESCHEDULING DEPLOY ---- &quot;</span><span class="p">)</span>
 192             <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>
 193         <span class="k">else</span><span class="p">:</span>
 194             <span class="bp">self</span><span class="o">.</span><span class="n">do_discover</span><span class="p">()</span>
 195             <span class="bp">self</span><span class="o">.</span><span class="n">do_provision</span><span class="p">()</span>
 196
 197             <span class="bp">self</span><span class="o">.</span><span class="n">set_ready</span><span class="p">()</span>
 198 </div>
 199 <div class="viewcode-block" id="LinuxTunTapFdLink.do_start"><a class="viewcode-back" href="../../../../../_layout/nepi.resources.linux.ns3.html#nepi.resources.linux.ns3.tuntapfdlink.LinuxTunTapFdLink.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>
 200         <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>
 201             <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>
 202             <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>
 203
 204             <span class="bp">self</span><span class="o">.</span><span class="n">set_started</span><span class="p">()</span>
 205         <span class="k">else</span><span class="p">:</span>
 206             <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>
 207             <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>
 208             <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">,</span> <span class="n">msg</span>
 209 </div>
 210     <span class="nd">@property</span>
 211     <span class="k">def</span> <span class="nf">_start_command</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 212         <span class="n">address</span> <span class="o">=</span> <span class="n">base64</span><span class="o">.</span><span class="n">b64encode</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">send_address</span><span class="p">)</span>
 213
 214         <span class="n">command</span> <span class="o">=</span> <span class="p">[]</span>
 215         <span class="c"># Use tap-passfd.py to send fd from TAP to FdNetDevice</span>
 216         <span class="n">command</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s">&quot;sudo -S&quot;</span><span class="p">)</span>
 217         <span class="n">command</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s">&quot;PYTHONPATH=$PYTHONPATH:${SRC}&quot;</span><span class="p">)</span>
 218         <span class="n">command</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s">&quot;python ${SRC}/linux-tap-passfd.py&quot;</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;-a </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">address</span><span class="p">)</span>
 220         <span class="n">command</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s">&quot;-S </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">tap</span><span class="o">.</span><span class="n">sock_name</span><span class="p">)</span>
 221
 222         <span class="n">command</span> <span class="o">=</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>
 223         <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>
 224
 225         <span class="k">return</span> <span class="n">command</span>
 226 </pre></div></div>
 227
 228           </div>
 229         </div>
 230       </div>
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 232     </div>
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