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  65
  66   <h1>Source code for nepi.resources.linux.netns.netnsclient</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">import</span> <span class="nn">base64</span>
  86 <span class="kn">import</span> <span class="nn">cPickle</span>
  87 <span class="kn">import</span> <span class="nn">errno</span>
  88 <span class="kn">import</span> <span class="nn">os</span>
  89 <span class="kn">import</span> <span class="nn">socket</span>
  90 <span class="kn">import</span> <span class="nn">time</span>
  91 <span class="kn">import</span> <span class="nn">weakref</span>
  92
  93 <span class="kn">from</span> <span class="nn">optparse</span> <span class="kn">import</span> <span class="n">OptionParser</span><span class="p">,</span> <span class="n">SUPPRESS_HELP</span>
  94
  95 <span class="kn">from</span> <span class="nn">nepi.resources.netns.netnsclient</span> <span class="kn">import</span> <span class="n">NetNSClient</span>
  96 <span class="kn">from</span> <span class="nn">nepi.resources.netns.netnsserver</span> <span class="kn">import</span> <span class="n">NetNSWrapperMessage</span>
  97
  98 <div class="viewcode-block" id="LinuxNetNSClient"><a class="viewcode-back" href="../../../../../_layout/nepi.resources.linux.netns.html#nepi.resources.linux.netns.netnsclient.LinuxNetNSClient">[docs]</a><span class="k">class</span> <span class="nc">LinuxNetNSClient</span><span class="p">(</span><span class="n">NetNSClient</span><span class="p">):</span>
  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">emulation</span><span class="p">):</span>
 100         <span class="nb">super</span><span class="p">(</span><span class="n">LinuxNetNSClient</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>
 101         <span class="bp">self</span><span class="o">.</span><span class="n">_emulation</span> <span class="o">=</span> <span class="n">weakref</span><span class="o">.</span><span class="n">ref</span><span class="p">(</span><span class="n">emulation</span><span class="p">)</span>
 102
 103         <span class="bp">self</span><span class="o">.</span><span class="n">_socat_proc</span> <span class="o">=</span> <span class="bp">None</span>
 104
 105     <span class="nd">@property</span>
 106 <div class="viewcode-block" id="LinuxNetNSClient.emulation"><a class="viewcode-back" href="../../../../../_layout/nepi.resources.linux.netns.html#nepi.resources.linux.netns.netnsclient.LinuxNetNSClient.emulation">[docs]</a>    <span class="k">def</span> <span class="nf">emulation</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 107         <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_emulation</span><span class="p">()</span>
 108 </div>
 109 <div class="viewcode-block" id="LinuxNetNSClient.send_msg"><a class="viewcode-back" href="../../../../../_layout/nepi.resources.linux.netns.html#nepi.resources.linux.netns.netnsclient.LinuxNetNSClient.send_msg">[docs]</a>    <span class="k">def</span> <span class="nf">send_msg</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">msg_type</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
 110         <span class="n">msg</span> <span class="o">=</span> <span class="p">[</span><span class="n">msg_type</span><span class="p">,</span> <span class="n">args</span><span class="p">,</span> <span class="n">kwargs</span><span class="p">]</span>
 111
 112         <span class="k">def</span> <span class="nf">encode</span><span class="p">(</span><span class="n">item</span><span class="p">):</span>
 113             <span class="n">item</span> <span class="o">=</span> <span class="n">cPickle</span><span class="o">.</span><span class="n">dumps</span><span class="p">(</span><span class="n">item</span><span class="p">)</span>
 114             <span class="k">return</span> <span class="n">base64</span><span class="o">.</span><span class="n">b64encode</span><span class="p">(</span><span class="n">item</span><span class="p">)</span>
 115
 116         <span class="n">encoded</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="nb">map</span><span class="p">(</span><span class="n">encode</span><span class="p">,</span> <span class="n">msg</span><span class="p">))</span>
 117
 118         <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">emulation</span><span class="o">.</span><span class="n">node</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="ow">in</span> <span class="p">[</span><span class="s">&#39;localhost&#39;</span><span class="p">,</span> <span class="s">&#39;127.0.0.1&#39;</span><span class="p">]:</span>
 119             <span class="n">sock</span> <span class="o">=</span> <span class="n">socket</span><span class="o">.</span><span class="n">socket</span><span class="p">(</span><span class="n">socket</span><span class="o">.</span><span class="n">AF_UNIX</span><span class="p">,</span> <span class="n">socket</span><span class="o">.</span><span class="n">SOCK_STREAM</span><span class="p">)</span>
 120             <span class="n">sock</span><span class="o">.</span><span class="n">connect</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">emulation</span><span class="o">.</span><span class="n">remote_socket</span><span class="p">)</span>
 121             <span class="n">sock</span><span class="o">.</span><span class="n">send</span><span class="p">(</span><span class="s">&quot;</span><span class="si">%s</span><span class="se">\n</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">encoded</span><span class="p">)</span>
 122             <span class="n">reply</span> <span class="o">=</span> <span class="n">sock</span><span class="o">.</span><span class="n">recv</span><span class="p">(</span><span class="mi">1024</span><span class="p">)</span>
 123             <span class="n">sock</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
 124         <span class="k">else</span><span class="p">:</span>
 125             <span class="n">command</span> <span class="o">=</span> <span class="p">(</span> <span class="s">&quot;python -c &#39;import socket;&quot;</span>
 126                 <span class="s">&quot;sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM);&quot;</span>
 127                 <span class="s">&quot;sock.connect(</span><span class="se">\&quot;</span><span class="si">%(socket_addr)s</span><span class="se">\&quot;</span><span class="s">);&quot;</span>
 128                 <span class="s">&quot;msg = </span><span class="se">\&quot;</span><span class="si">%(encoded_message)s</span><span class="se">\\</span><span class="s">n</span><span class="se">\&quot;</span><span class="s">;&quot;</span>
 129                 <span class="s">&quot;sock.send(msg);&quot;</span>
 130                 <span class="s">&quot;reply = sock.recv(1024);&quot;</span>
 131                 <span class="s">&quot;sock.close();&quot;</span>
 132                 <span class="s">&quot;print reply&#39;&quot;</span><span class="p">)</span> <span class="o">%</span> <span class="p">{</span>
 133                     <span class="s">&quot;encoded_message&quot;</span><span class="p">:</span> <span class="n">encoded</span><span class="p">,</span>
 134                     <span class="s">&quot;socket_addr&quot;</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">emulation</span><span class="o">.</span><span class="n">remote_socket</span><span class="p">,</span>
 135                     <span class="p">}</span>
 136
 137             <span class="p">(</span><span class="n">reply</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">emulation</span><span class="o">.</span><span class="n">node</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="n">command</span><span class="p">,</span>
 138                     <span class="n">with_lock</span> <span class="o">=</span> <span class="bp">True</span><span class="p">)</span>
 139
 140             <span class="k">if</span> <span class="p">(</span><span class="n">err</span> <span class="ow">and</span> <span class="n">proc</span><span class="o">.</span><span class="n">poll</span><span class="p">())</span> <span class="ow">or</span> <span class="n">reply</span><span class="o">.</span><span class="n">strip</span><span class="p">()</span> <span class="o">==</span> <span class="s">&quot;&quot;</span><span class="p">:</span>
 141                 <span class="n">msg</span> <span class="o">=</span> <span class="p">(</span><span class="s">&quot; Couldn&#39;t connect to remote socket </span><span class="si">%s</span><span class="s"> - REPLY: </span><span class="si">%s</span><span class="s"> &quot;</span>
 142                       <span class="s">&quot;- ERROR: </span><span class="si">%s</span><span class="s"> &quot;</span><span class="p">)</span> <span class="o">%</span> <span class="p">(</span>
 143                         <span class="bp">self</span><span class="o">.</span><span class="n">emulation</span><span class="o">.</span><span class="n">remote_socket</span><span class="p">,</span> <span class="n">reply</span><span class="p">,</span> <span class="n">err</span><span class="p">)</span>
 144                 <span class="bp">self</span><span class="o">.</span><span class="n">emulation</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">reply</span><span class="p">,</span> <span class="n">err</span><span class="p">)</span>
 145                 <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span>
 146
 147         <span class="n">reply</span> <span class="o">=</span> <span class="n">cPickle</span><span class="o">.</span><span class="n">loads</span><span class="p">(</span><span class="n">base64</span><span class="o">.</span><span class="n">b64decode</span><span class="p">(</span><span class="n">reply</span><span class="p">))</span>
 148
 149         <span class="k">return</span> <span class="n">reply</span>
 150 </div>
 151 <div class="viewcode-block" id="LinuxNetNSClient.create"><a class="viewcode-back" href="../../../../../_layout/nepi.resources.linux.netns.html#nepi.resources.linux.netns.netnsclient.LinuxNetNSClient.create">[docs]</a>    <span class="k">def</span> <span class="nf">create</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
 152         <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">send_msg</span><span class="p">(</span><span class="n">NetNSWrapperMessage</span><span class="o">.</span><span class="n">CREATE</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
 153 </div>
 154 <div class="viewcode-block" id="LinuxNetNSClient.invoke"><a class="viewcode-back" href="../../../../../_layout/nepi.resources.linux.netns.html#nepi.resources.linux.netns.netnsclient.LinuxNetNSClient.invoke">[docs]</a>    <span class="k">def</span> <span class="nf">invoke</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
 155         <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">send_msg</span><span class="p">(</span><span class="n">NetNSWrapperMessage</span><span class="o">.</span><span class="n">INVOKE</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
 156 </div>
 157 <div class="viewcode-block" id="LinuxNetNSClient.set"><a class="viewcode-back" href="../../../../../_layout/nepi.resources.linux.netns.html#nepi.resources.linux.netns.netnsclient.LinuxNetNSClient.set">[docs]</a>    <span class="k">def</span> <span class="nf">set</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
 158         <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">send_msg</span><span class="p">(</span><span class="n">NetNSWrapperMessage</span><span class="o">.</span><span class="n">SET</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
 159 </div>
 160 <div class="viewcode-block" id="LinuxNetNSClient.get"><a class="viewcode-back" href="../../../../../_layout/nepi.resources.linux.netns.html#nepi.resources.linux.netns.netnsclient.LinuxNetNSClient.get">[docs]</a>    <span class="k">def</span> <span class="nf">get</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
 161         <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">send_msg</span><span class="p">(</span><span class="n">NetNSWrapperMessage</span><span class="o">.</span><span class="n">GET</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
 162 </div>
 163 <div class="viewcode-block" id="LinuxNetNSClient.flush"><a class="viewcode-back" href="../../../../../_layout/nepi.resources.linux.netns.html#nepi.resources.linux.netns.netnsclient.LinuxNetNSClient.flush">[docs]</a>    <span class="k">def</span> <span class="nf">flush</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
 164         <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">send_msg</span><span class="p">(</span><span class="n">NetNSWrapperMessage</span><span class="o">.</span><span class="n">FLUSH</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
 165 </div>
 166 <div class="viewcode-block" id="LinuxNetNSClient.shutdown"><a class="viewcode-back" href="../../../../../_layout/nepi.resources.linux.netns.html#nepi.resources.linux.netns.netnsclient.LinuxNetNSClient.shutdown">[docs]</a>    <span class="k">def</span> <span class="nf">shutdown</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
 167         <span class="k">try</span><span class="p">:</span>
 168             <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">send_msg</span><span class="p">(</span><span class="n">NetNSWrapperMessage</span><span class="o">.</span><span class="n">SHUTDOWN</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
 169         <span class="k">except</span><span class="p">:</span>
 170             <span class="k">pass</span>
 171
 172         <span class="k">return</span> <span class="bp">None</span>
 173 </pre></div></div></div>
 174
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