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LOCAL_DOCTEST=/usr/local/bin/toxcore_run_doctest3.bash
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lint::
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<div class="section" id="comparing-directory-authority-flags">
<h1>Comparing Directory Authority Flags<a class="headerlink" href="#comparing-directory-authority-flags" title="Permalink to this headline"></a></h1>
<a class="reference external image-reference" href="../double_double_toil_and_trouble.html"><img alt="../../_images/back.png" src="../../_images/back.png" /></a>
<p>Compares the votes of two directory authorities, in this case moria1 and
maatuska, with a special interest in the 'Running' flag.</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">import</span> <span class="nn">collections</span>
<span class="kn">import</span> <span class="nn">stem.descriptor</span>
<span class="kn">import</span> <span class="nn">stem.descriptor.remote</span>
<span class="kn">import</span> <span class="nn">stem.directory</span>
<span class="c"># Query all authority votes asynchronously.</span>
<span class="n">downloader</span> <span class="o">=</span> <span class="n">stem</span><span class="o">.</span><span class="n">descriptor</span><span class="o">.</span><span class="n">remote</span><span class="o">.</span><span class="n">DescriptorDownloader</span><span class="p">(</span>
<span class="n">document_handler</span> <span class="o">=</span> <span class="n">stem</span><span class="o">.</span><span class="n">descriptor</span><span class="o">.</span><span class="n">DocumentHandler</span><span class="o">.</span><span class="n">DOCUMENT</span><span class="p">,</span>
<span class="p">)</span>
<span class="c"># An ordered dictionary ensures queries are finished in the order they were</span>
<span class="c"># added.</span>
<span class="n">queries</span> <span class="o">=</span> <span class="n">collections</span><span class="o">.</span><span class="n">OrderedDict</span><span class="p">()</span>
<span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">authority</span> <span class="ow">in</span> <span class="n">stem</span><span class="o">.</span><span class="n">directory</span><span class="o">.</span><span class="n">Authority</span><span class="o">.</span><span class="n">from_cache</span><span class="p">()</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
<span class="k">if</span> <span class="n">authority</span><span class="o">.</span><span class="n">v3ident</span> <span class="ow">is</span> <span class="bp">None</span><span class="p">:</span>
<span class="k">continue</span> <span class="c"># authority doesn&#39;t vote if it lacks a v3ident</span>
<span class="n">queries</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">downloader</span><span class="o">.</span><span class="n">get_vote</span><span class="p">(</span><span class="n">authority</span><span class="p">)</span>
<span class="c"># Wait for the votes to finish being downloaded, this produces a dictionary of</span>
<span class="c"># authority nicknames to their vote.</span>
<span class="n">votes</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">((</span><span class="n">name</span><span class="p">,</span> <span class="n">query</span><span class="o">.</span><span class="n">run</span><span class="p">()[</span><span class="mi">0</span><span class="p">])</span> <span class="k">for</span> <span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">query</span><span class="p">)</span> <span class="ow">in</span> <span class="n">queries</span><span class="o">.</span><span class="n">items</span><span class="p">())</span>
<span class="c"># Get a superset of all the fingerprints in all the votes.</span>
<span class="n">all_fingerprints</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span>
<span class="k">for</span> <span class="n">vote</span> <span class="ow">in</span> <span class="n">votes</span><span class="o">.</span><span class="n">values</span><span class="p">():</span>
<span class="n">all_fingerprints</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">vote</span><span class="o">.</span><span class="n">routers</span><span class="o">.</span><span class="n">keys</span><span class="p">())</span>
<span class="c"># Finally, compare moria1&#39;s votes to maatuska&#39;s votes.</span>
<span class="k">for</span> <span class="n">fingerprint</span> <span class="ow">in</span> <span class="n">all_fingerprints</span><span class="p">:</span>
<span class="n">moria1_vote</span> <span class="o">=</span> <span class="n">votes</span><span class="p">[</span><span class="s">&#39;moria1&#39;</span><span class="p">]</span><span class="o">.</span><span class="n">routers</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">fingerprint</span><span class="p">)</span>
<span class="n">maatuska_vote</span> <span class="o">=</span> <span class="n">votes</span><span class="p">[</span><span class="s">&#39;maatuska&#39;</span><span class="p">]</span><span class="o">.</span><span class="n">routers</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">fingerprint</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">moria1_vote</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">maatuska_vote</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot;both moria1 and maatuska haven&#39;t voted about </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">fingerprint</span><span class="p">)</span>
<span class="k">elif</span> <span class="ow">not</span> <span class="n">moria1_vote</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot;moria1 hasn&#39;t voted about </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">fingerprint</span><span class="p">)</span>
<span class="k">elif</span> <span class="ow">not</span> <span class="n">maatuska_vote</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot;maatuska hasn&#39;t voted about </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">fingerprint</span><span class="p">)</span>
<span class="k">elif</span> <span class="s">&#39;Running&#39;</span> <span class="ow">in</span> <span class="n">moria1_vote</span><span class="o">.</span><span class="n">flags</span> <span class="ow">and</span> <span class="s">&#39;Running&#39;</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">maatuska_vote</span><span class="o">.</span><span class="n">flags</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot;moria1 has the Running flag but maatuska doesn&#39;t: </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">fingerprint</span><span class="p">)</span>
<span class="k">elif</span> <span class="s">&#39;Running&#39;</span> <span class="ow">in</span> <span class="n">maatuska_vote</span><span class="o">.</span><span class="n">flags</span> <span class="ow">and</span> <span class="s">&#39;Running&#39;</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">moria1_vote</span><span class="o">.</span><span class="n">flags</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot;maatuska has the Running flag but moria1 doesn&#39;t: </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">fingerprint</span><span class="p">)</span>
</pre></div>
</div>
<div class="highlight-python"><pre>% python compare_flags.py
maatuska has the Running flag but moria1 doesn't: 92FCB6748A40E6088E22FBAB943AB2DD743EA818
maatuska has the Running flag but moria1 doesn't: 6871F682350BA931838C0EC1E4A23044DAE06A73
maatuska has the Running flag but moria1 doesn't: E2BB13AA2F6960CD93ABE5257A825687F3973C62
moria1 has the Running flag but maatuska doesn't: 546C54E2A89D88E0794D04AECBF1AC8AC9DA81DE
moria1 has the Running flag but maatuska doesn't: DCAEC3D069DC39AAE43D13C8AF31B5645E05ED61
...</pre>
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<div class="section" id="download-tor-descriptors">
<h1>Download Tor Descriptors<a class="headerlink" href="#download-tor-descriptors" title="Permalink to this headline"></a></h1>
<a class="reference external image-reference" href="../double_double_toil_and_trouble.html"><img alt="../../_images/back.png" src="../../_images/back.png" /></a>
<p>Tor relays provide a mirror for the tor relay descriptors it has cached.
These are available from its ORPort using <a class="reference external" href="https://gitweb.torproject.org/torspec.git/tree/tor-spec.txt">Tor's wire protocol</a>, and optionally
with http as well from a <a class="reference external" href="https://gitweb.torproject.org/torspec.git/tree/dir-spec.txt">DirPort</a>.</p>
<div class="highlight-python"><div class="highlight"><pre><span class="sd">&quot;&quot;&quot;</span>
<span class="sd">Simple script to dowload a descriptor from Tor&#39;s ORPort or DirPort.</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="kn">import</span> <span class="nn">collections</span>
<span class="kn">import</span> <span class="nn">getopt</span>
<span class="kn">import</span> <span class="nn">sys</span>
<span class="kn">import</span> <span class="nn">stem</span>
<span class="kn">import</span> <span class="nn">stem.descriptor.remote</span>
<span class="kn">import</span> <span class="nn">stem.util.connection</span>
<span class="kn">import</span> <span class="nn">stem.util.tor_tools</span>
<span class="c"># By default downloading moria1&#39;s server descriptor from itself.</span>
<span class="n">DEFAULT_ARGS</span> <span class="o">=</span> <span class="p">{</span>
<span class="s">&#39;descriptor_type&#39;</span><span class="p">:</span> <span class="s">&#39;server&#39;</span><span class="p">,</span>
<span class="s">&#39;fingerprint&#39;</span><span class="p">:</span> <span class="s">&#39;9695DFC35FFEB861329B9F1AB04C46397020CE31&#39;</span><span class="p">,</span>
<span class="s">&#39;download_from&#39;</span><span class="p">:</span> <span class="n">stem</span><span class="o">.</span><span class="n">DirPort</span><span class="p">(</span><span class="s">&#39;128.31.0.34&#39;</span><span class="p">,</span> <span class="mi">9131</span><span class="p">),</span>
<span class="s">&#39;print_help&#39;</span><span class="p">:</span> <span class="bp">False</span><span class="p">,</span>
<span class="p">}</span>
<span class="n">VALID_TYPES</span> <span class="o">=</span> <span class="p">(</span><span class="s">&#39;server&#39;</span><span class="p">,</span> <span class="s">&#39;extrainfo&#39;</span><span class="p">,</span> <span class="s">&#39;consensus&#39;</span><span class="p">)</span>
<span class="n">HELP_TEXT</span> <span class="o">=</span> <span class="s">&quot;&quot;&quot;</span><span class="se">\</span>
<span class="s">Downloads a descriptor through Tor&#39;s ORPort or DirPort.</span>
<span class="s"> -t, --type TYPE descriptor type to download, options are:</span>
<span class="s"> </span><span class="si">%s</span><span class="s"></span>
<span class="s"> -f, --fingerprint FP relay to download the descriptor of</span>
<span class="s"> --orport ADDRESS:PORT ORPort to download from</span>
<span class="s"> --dirport ADDRESS:PORT DirPort to download from</span>
<span class="s"> -h, --help presents this help</span>
<span class="s">&quot;&quot;&quot;</span> <span class="o">%</span> <span class="s">&#39;, &#39;</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">VALID_TYPES</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">parse</span><span class="p">(</span><span class="n">argv</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Parses our arguments, providing a named tuple with their values.</span>
<span class="sd"> :param list argv: input arguments to be parsed</span>
<span class="sd"> :returns: a **named tuple** with our parsed arguments</span>
<span class="sd"> :raises: **ValueError** if we got an invalid argument</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">args</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">(</span><span class="n">DEFAULT_ARGS</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">recognized_args</span><span class="p">,</span> <span class="n">unrecognized_args</span> <span class="o">=</span> <span class="n">getopt</span><span class="o">.</span><span class="n">getopt</span><span class="p">(</span><span class="n">argv</span><span class="p">,</span> <span class="s">&#39;t:f:h&#39;</span><span class="p">,</span> <span class="p">[</span><span class="s">&#39;type=&#39;</span><span class="p">,</span> <span class="s">&#39;fingerprint=&#39;</span><span class="p">,</span> <span class="s">&#39;orport=&#39;</span><span class="p">,</span> <span class="s">&#39;dirport=&#39;</span><span class="p">,</span> <span class="s">&#39;help&#39;</span><span class="p">])</span>
<span class="k">if</span> <span class="n">unrecognized_args</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">getopt</span><span class="o">.</span><span class="n">GetoptError</span><span class="p">(</span><span class="s">&quot;&#39;</span><span class="si">%s</span><span class="s">&#39; aren&#39;t recognized arguments&quot;</span> <span class="o">%</span> <span class="s">&quot;&#39;, &#39;&quot;</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">unrecognized_args</span><span class="p">))</span>
<span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">exc</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s">&#39;</span><span class="si">%s</span><span class="s"> (for usage provide --help)&#39;</span> <span class="o">%</span> <span class="n">exc</span><span class="p">)</span>
<span class="k">for</span> <span class="n">opt</span><span class="p">,</span> <span class="n">arg</span> <span class="ow">in</span> <span class="n">recognized_args</span><span class="p">:</span>
<span class="k">if</span> <span class="n">opt</span> <span class="ow">in</span> <span class="p">(</span><span class="s">&#39;-t&#39;</span><span class="p">,</span> <span class="s">&#39;--type&#39;</span><span class="p">):</span>
<span class="k">if</span> <span class="n">arg</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">VALID_TYPES</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s">&quot;&#39;</span><span class="si">%s</span><span class="s">&#39; isn&#39;t a recognized decriptor type, options are: </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">arg</span><span class="p">,</span> <span class="s">&#39;, &#39;</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">VALID_TYPES</span><span class="p">)))</span>
<span class="n">args</span><span class="p">[</span><span class="s">&#39;descriptor_type&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">arg</span>
<span class="k">elif</span> <span class="n">opt</span> <span class="ow">in</span> <span class="p">(</span><span class="s">&#39;-f&#39;</span><span class="p">,</span> <span class="s">&#39;--fingerprint&#39;</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">stem</span><span class="o">.</span><span class="n">util</span><span class="o">.</span><span class="n">tor_tools</span><span class="o">.</span><span class="n">is_valid_fingerprint</span><span class="p">(</span><span class="n">arg</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s">&quot;&#39;</span><span class="si">%s</span><span class="s">&#39; isn&#39;t a relay fingerprint&quot;</span> <span class="o">%</span> <span class="n">arg</span><span class="p">)</span>
<span class="n">args</span><span class="p">[</span><span class="s">&#39;fingerprint&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">arg</span>
<span class="k">elif</span> <span class="n">opt</span> <span class="ow">in</span> <span class="p">(</span><span class="s">&#39;--orport&#39;</span><span class="p">,</span> <span class="s">&#39;--dirport&#39;</span><span class="p">):</span>
<span class="k">if</span> <span class="s">&#39;:&#39;</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">arg</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s">&quot;&#39;</span><span class="si">%s</span><span class="s">&#39; should be of the form &#39;address:port&#39;&quot;</span> <span class="o">%</span> <span class="n">arg</span><span class="p">)</span>
<span class="n">address</span><span class="p">,</span> <span class="n">port</span> <span class="o">=</span> <span class="n">arg</span><span class="o">.</span><span class="n">rsplit</span><span class="p">(</span><span class="s">&#39;:&#39;</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">stem</span><span class="o">.</span><span class="n">util</span><span class="o">.</span><span class="n">connection</span><span class="o">.</span><span class="n">is_valid_ipv4_address</span><span class="p">(</span><span class="n">address</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s">&quot;&#39;</span><span class="si">%s</span><span class="s">&#39; isn&#39;t a valid IPv4 address&quot;</span> <span class="o">%</span> <span class="n">address</span><span class="p">)</span>
<span class="k">elif</span> <span class="ow">not</span> <span class="n">stem</span><span class="o">.</span><span class="n">util</span><span class="o">.</span><span class="n">connection</span><span class="o">.</span><span class="n">is_valid_port</span><span class="p">(</span><span class="n">port</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s">&quot;&#39;</span><span class="si">%s</span><span class="s">&#39; isn&#39;t a valid port number&quot;</span> <span class="o">%</span> <span class="n">port</span><span class="p">)</span>
<span class="n">endpoint_class</span> <span class="o">=</span> <span class="n">stem</span><span class="o">.</span><span class="n">ORPort</span> <span class="k">if</span> <span class="n">opt</span> <span class="o">==</span> <span class="s">&#39;--orport&#39;</span> <span class="k">else</span> <span class="n">stem</span><span class="o">.</span><span class="n">DirPort</span>
<span class="n">args</span><span class="p">[</span><span class="s">&#39;download_from&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">endpoint_class</span><span class="p">(</span><span class="n">address</span><span class="p">,</span> <span class="n">port</span><span class="p">)</span>
<span class="k">elif</span> <span class="n">opt</span> <span class="ow">in</span> <span class="p">(</span><span class="s">&#39;-h&#39;</span><span class="p">,</span> <span class="s">&#39;--help&#39;</span><span class="p">):</span>
<span class="n">args</span><span class="p">[</span><span class="s">&#39;print_help&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="bp">True</span>
<span class="c"># translates our args dict into a named tuple</span>
<span class="n">Args</span> <span class="o">=</span> <span class="n">collections</span><span class="o">.</span><span class="n">namedtuple</span><span class="p">(</span><span class="s">&#39;Args&#39;</span><span class="p">,</span> <span class="n">args</span><span class="o">.</span><span class="n">keys</span><span class="p">())</span>
<span class="k">return</span> <span class="n">Args</span><span class="p">(</span><span class="o">**</span><span class="n">args</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">main</span><span class="p">():</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">args</span> <span class="o">=</span> <span class="n">parse</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">1</span><span class="p">:])</span>
<span class="k">except</span> <span class="ne">ValueError</span> <span class="k">as</span> <span class="n">exc</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="n">exc</span><span class="p">)</span>
<span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
<span class="k">if</span> <span class="n">args</span><span class="o">.</span><span class="n">print_help</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="n">HELP_TEXT</span><span class="p">)</span>
<span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">()</span>
<span class="k">print</span><span class="p">(</span><span class="s">&#39;Downloading </span><span class="si">%s</span><span class="s"> descriptor from </span><span class="si">%s</span><span class="s">:</span><span class="si">%s</span><span class="s">...</span><span class="se">\n</span><span class="s">&#39;</span> <span class="o">%</span> <span class="p">(</span><span class="n">args</span><span class="o">.</span><span class="n">descriptor_type</span><span class="p">,</span> <span class="n">args</span><span class="o">.</span><span class="n">download_from</span><span class="o">.</span><span class="n">address</span><span class="p">,</span> <span class="n">args</span><span class="o">.</span><span class="n">download_from</span><span class="o">.</span><span class="n">port</span><span class="p">))</span>
<span class="n">desc</span> <span class="o">=</span> <span class="bp">None</span>
<span class="k">if</span> <span class="n">args</span><span class="o">.</span><span class="n">descriptor_type</span> <span class="ow">in</span> <span class="p">(</span><span class="s">&#39;server&#39;</span><span class="p">,</span> <span class="s">&#39;extrainfo&#39;</span><span class="p">):</span>
<span class="k">if</span> <span class="n">args</span><span class="o">.</span><span class="n">descriptor_type</span> <span class="o">==</span> <span class="s">&#39;server&#39;</span><span class="p">:</span>
<span class="n">download_func</span> <span class="o">=</span> <span class="n">stem</span><span class="o">.</span><span class="n">descriptor</span><span class="o">.</span><span class="n">remote</span><span class="o">.</span><span class="n">get_server_descriptors</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">download_func</span> <span class="o">=</span> <span class="n">stem</span><span class="o">.</span><span class="n">descriptor</span><span class="o">.</span><span class="n">remote</span><span class="o">.</span><span class="n">get_extrainfo_descriptors</span>
<span class="n">desc</span> <span class="o">=</span> <span class="n">download_func</span><span class="p">(</span>
<span class="n">fingerprints</span> <span class="o">=</span> <span class="p">[</span><span class="n">args</span><span class="o">.</span><span class="n">fingerprint</span><span class="p">],</span>
<span class="n">endpoints</span> <span class="o">=</span> <span class="p">[</span><span class="n">args</span><span class="o">.</span><span class="n">download_from</span><span class="p">],</span>
<span class="p">)</span><span class="o">.</span><span class="n">run</span><span class="p">()[</span><span class="mi">0</span><span class="p">]</span>
<span class="k">elif</span> <span class="n">args</span><span class="o">.</span><span class="n">descriptor_type</span> <span class="o">==</span> <span class="s">&#39;consensus&#39;</span><span class="p">:</span>
<span class="k">for</span> <span class="n">consensus_desc</span> <span class="ow">in</span> <span class="n">stem</span><span class="o">.</span><span class="n">descriptor</span><span class="o">.</span><span class="n">remote</span><span class="o">.</span><span class="n">get_consensus</span><span class="p">(</span><span class="n">endpoints</span> <span class="o">=</span> <span class="p">[</span><span class="n">args</span><span class="o">.</span><span class="n">download_from</span><span class="p">]):</span>
<span class="k">if</span> <span class="n">consensus_desc</span><span class="o">.</span><span class="n">fingerprint</span> <span class="o">==</span> <span class="n">args</span><span class="o">.</span><span class="n">fingerprint</span><span class="p">:</span>
<span class="n">desc</span> <span class="o">=</span> <span class="n">consensus_desc</span>
<span class="k">break</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">desc</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s">&#39;Unable to find a descriptor for </span><span class="si">%s</span><span class="s"> in the consensus&#39;</span> <span class="o">%</span> <span class="n">args</span><span class="o">.</span><span class="n">fingerprint</span><span class="p">)</span>
<span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot;&#39;</span><span class="si">%s</span><span class="s">&#39; is not a recognized descriptor type, options are: </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">args</span><span class="o">.</span><span class="n">descriptor_type</span><span class="p">,</span> <span class="s">&#39;, &#39;</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">VALID_TYPES</span><span class="p">)))</span>
<span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
<span class="k">print</span><span class="p">(</span><span class="n">desc</span><span class="p">)</span>
<span class="k">if</span> <span class="n">__name__</span> <span class="o">==</span> <span class="s">&#39;__main__&#39;</span><span class="p">:</span>
<span class="n">main</span><span class="p">()</span>
</pre></div>
</div>
<div class="highlight-python"><pre>% python download_descriptor.py --type consensus --dirport 128.31.0.34:9131
Downloading consensus descriptor from 128.31.0.34:9131...
r moria1 lpXfw1/+uGEym58asExGOXAgzjE IpcU7dolas8+Q+oAzwgvZIWx7PA 2018-05-23 02:41:25 128.31.0.34 9101 9131
s Authority Fast Running Stable V2Dir Valid
v Tor 0.3.3.5-rc-dev
pr Cons=1-2 Desc=1-2 DirCache=1-2 HSDir=1-2 HSIntro=3-4 HSRend=1-2 Link=1-5 LinkAuth=1,3 Microdesc=1-2 Relay=1-2
w Bandwidth=20 Unmeasured=1
p reject 1-65535</pre>
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<div class="section" id="determine-the-exit-you-re-using">
<h1>Determine The Exit You're Using<a class="headerlink" href="#determine-the-exit-you-re-using" title="Permalink to this headline"></a></h1>
<a class="reference external image-reference" href="../double_double_toil_and_trouble.html"><img alt="../../_images/back.png" src="../../_images/back.png" /></a>
<p>Lets say you're using Tor and one day you run into something odd. Maybe a
misconfigured relay, or maybe one that's being malicious. How can you figure
out what exit you're using?</p>
<p>Here's a simple script that prints information about the exits used to service
the requests going through Tor...</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">import</span> <span class="nn">functools</span>
<span class="kn">from</span> <span class="nn">stem</span> <span class="kn">import</span> <span class="n">StreamStatus</span>
<span class="kn">from</span> <span class="nn">stem.control</span> <span class="kn">import</span> <span class="n">EventType</span><span class="p">,</span> <span class="n">Controller</span>
<span class="k">def</span> <span class="nf">main</span><span class="p">():</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot;Tracking requests for tor exits. Press &#39;enter&#39; to end.&quot;</span><span class="p">)</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot;&quot;</span><span class="p">)</span>
<span class="k">with</span> <span class="n">Controller</span><span class="o">.</span><span class="n">from_port</span><span class="p">()</span> <span class="k">as</span> <span class="n">controller</span><span class="p">:</span>
<span class="n">controller</span><span class="o">.</span><span class="n">authenticate</span><span class="p">()</span>
<span class="n">stream_listener</span> <span class="o">=</span> <span class="n">functools</span><span class="o">.</span><span class="n">partial</span><span class="p">(</span><span class="n">stream_event</span><span class="p">,</span> <span class="n">controller</span><span class="p">)</span>
<span class="n">controller</span><span class="o">.</span><span class="n">add_event_listener</span><span class="p">(</span><span class="n">stream_listener</span><span class="p">,</span> <span class="n">EventType</span><span class="o">.</span><span class="n">STREAM</span><span class="p">)</span>
<span class="nb">raw_input</span><span class="p">()</span> <span class="c"># wait for user to press enter</span>
<span class="k">def</span> <span class="nf">stream_event</span><span class="p">(</span><span class="n">controller</span><span class="p">,</span> <span class="n">event</span><span class="p">):</span>
<span class="k">if</span> <span class="n">event</span><span class="o">.</span><span class="n">status</span> <span class="o">==</span> <span class="n">StreamStatus</span><span class="o">.</span><span class="n">SUCCEEDED</span> <span class="ow">and</span> <span class="n">event</span><span class="o">.</span><span class="n">circ_id</span><span class="p">:</span>
<span class="n">circ</span> <span class="o">=</span> <span class="n">controller</span><span class="o">.</span><span class="n">get_circuit</span><span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">circ_id</span><span class="p">)</span>
<span class="n">exit_fingerprint</span> <span class="o">=</span> <span class="n">circ</span><span class="o">.</span><span class="n">path</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">][</span><span class="mi">0</span><span class="p">]</span>
<span class="n">exit_relay</span> <span class="o">=</span> <span class="n">controller</span><span class="o">.</span><span class="n">get_network_status</span><span class="p">(</span><span class="n">exit_fingerprint</span><span class="p">)</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot;Exit relay for our connection to </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">target</span><span class="p">))</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot; address: </span><span class="si">%s</span><span class="s">:</span><span class="si">%i</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">exit_relay</span><span class="o">.</span><span class="n">address</span><span class="p">,</span> <span class="n">exit_relay</span><span class="o">.</span><span class="n">or_port</span><span class="p">))</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot; fingerprint: </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">exit_relay</span><span class="o">.</span><span class="n">fingerprint</span><span class="p">)</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot; nickname: </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">exit_relay</span><span class="o">.</span><span class="n">nickname</span><span class="p">)</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot; locale: </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">controller</span><span class="o">.</span><span class="n">get_info</span><span class="p">(</span><span class="s">&quot;ip-to-country/</span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">exit_relay</span><span class="o">.</span><span class="n">address</span><span class="p">,</span> <span class="s">&#39;unknown&#39;</span><span class="p">))</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot;&quot;</span><span class="p">)</span>
<span class="k">if</span> <span class="n">__name__</span> <span class="o">==</span> <span class="s">&#39;__main__&#39;</span><span class="p">:</span>
<span class="n">main</span><span class="p">()</span>
</pre></div>
</div>
<p>Now if you make a request over Tor...</p>
<div class="highlight-python"><pre>% curl --socks4a 127.0.0.1:9050 google.com
&lt;HTML&gt;&lt;HEAD&gt;&lt;meta http-equiv="content-type" content="text/html;charset=utf-8"&gt;
&lt;TITLE&gt;301 Moved&lt;/TITLE&gt;&lt;/HEAD&gt;&lt;BODY&gt;
&lt;H1&gt;301 Moved&lt;/H1&gt;
The document has moved
&lt;A HREF="http://www.google.com/"&gt;here&lt;/A&gt;.
&lt;/BODY&gt;&lt;/HTML&gt;</pre>
</div>
<p>... this script will tell you about the exit...</p>
<div class="highlight-python"><pre>% python exit_used.py
Tracking requests for tor exits. Press 'enter' to end.
Exit relay for our connection to 64.15.112.44:80
address: 31.172.30.2:443
fingerprint: A59E1E7C7EAEE083D756EE1FF6EC31CA3D8651D7
nickname: chaoscomputerclub19
locale: unknown</pre>
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<div class="section" id="list-circuits">
<h1>List Circuits<a class="headerlink" href="#list-circuits" title="Permalink to this headline"></a></h1>
<a class="reference external image-reference" href="../double_double_toil_and_trouble.html"><img alt="../../_images/back.png" src="../../_images/back.png" /></a>
<p>Tor creates new circuits and tears down old ones on your behalf, so how can you
get information about circuits Tor currently has available?</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">stem</span> <span class="kn">import</span> <span class="n">CircStatus</span>
<span class="kn">from</span> <span class="nn">stem.control</span> <span class="kn">import</span> <span class="n">Controller</span>
<span class="k">with</span> <span class="n">Controller</span><span class="o">.</span><span class="n">from_port</span><span class="p">(</span><span class="n">port</span> <span class="o">=</span> <span class="mi">9051</span><span class="p">)</span> <span class="k">as</span> <span class="n">controller</span><span class="p">:</span>
<span class="n">controller</span><span class="o">.</span><span class="n">authenticate</span><span class="p">()</span>
<span class="k">for</span> <span class="n">circ</span> <span class="ow">in</span> <span class="nb">sorted</span><span class="p">(</span><span class="n">controller</span><span class="o">.</span><span class="n">get_circuits</span><span class="p">()):</span>
<span class="k">if</span> <span class="n">circ</span><span class="o">.</span><span class="n">status</span> <span class="o">!=</span> <span class="n">CircStatus</span><span class="o">.</span><span class="n">BUILT</span><span class="p">:</span>
<span class="k">continue</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot;&quot;</span><span class="p">)</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot;Circuit </span><span class="si">%s</span><span class="s"> (</span><span class="si">%s</span><span class="s">)&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">circ</span><span class="o">.</span><span class="n">id</span><span class="p">,</span> <span class="n">circ</span><span class="o">.</span><span class="n">purpose</span><span class="p">))</span>
<span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">entry</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">circ</span><span class="o">.</span><span class="n">path</span><span class="p">):</span>
<span class="n">div</span> <span class="o">=</span> <span class="s">&#39;+&#39;</span> <span class="k">if</span> <span class="p">(</span><span class="n">i</span> <span class="o">==</span> <span class="nb">len</span><span class="p">(</span><span class="n">circ</span><span class="o">.</span><span class="n">path</span><span class="p">)</span> <span class="o">-</span> <span class="mi">1</span><span class="p">)</span> <span class="k">else</span> <span class="s">&#39;|&#39;</span>
<span class="n">fingerprint</span><span class="p">,</span> <span class="n">nickname</span> <span class="o">=</span> <span class="n">entry</span>
<span class="n">desc</span> <span class="o">=</span> <span class="n">controller</span><span class="o">.</span><span class="n">get_network_status</span><span class="p">(</span><span class="n">fingerprint</span><span class="p">,</span> <span class="bp">None</span><span class="p">)</span>
<span class="n">address</span> <span class="o">=</span> <span class="n">desc</span><span class="o">.</span><span class="n">address</span> <span class="k">if</span> <span class="n">desc</span> <span class="k">else</span> <span class="s">&#39;unknown&#39;</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot; </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">, </span><span class="si">%s</span><span class="s">)&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">div</span><span class="p">,</span> <span class="n">fingerprint</span><span class="p">,</span> <span class="n">nickname</span><span class="p">,</span> <span class="n">address</span><span class="p">))</span>
</pre></div>
</div>
<div class="highlight-python"><pre>% python list_circuits.py
Circuit 4 (GENERAL)
|- B1FA7D51B8B6F0CB585D944F450E7C06EDE7E44C (ByTORAndTheSnowDog, 173.209.180.61)
|- 0DD9935C5E939CFA1E07B8DDA6D91C1A2A9D9338 (afo02, 87.238.194.176)
+- DB3B1CFBD3E4D97B84B548ADD5B9A31451EEC4CC (edwardsnowden3, 109.163.234.10)
Circuit 6 (GENERAL)
|- B1FA7D51B8B6F0CB585D944F450E7C06EDE7E44C (ByTORAndTheSnowDog, 173.209.180.61)
|- EC01CB4766BADC1611678555CE793F2A7EB2D723 (sprockets, 46.165.197.96)
+- 9EA317EECA56BDF30CAEB208A253FB456EDAB1A0 (bolobolo1, 96.47.226.20)
Circuit 10 (GENERAL)
|- B1FA7D51B8B6F0CB585D944F450E7C06EDE7E44C (ByTORAndTheSnowDog, 173.209.180.61)
|- 00C2C2A16AEDB51D5E5FB7D6168FC66B343D822F (ph3x, 86.59.119.83)
+- 65242C91BFF30F165DA4D132C81A9EBA94B71D62 (torexit16, 176.67.169.171)</pre>
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<h2 class="heading"><span>List Outdated Relays</span></h2>
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<ul id="navbar">
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<div class="section" id="list-outdated-relays">
<h1>List Outdated Relays<a class="headerlink" href="#list-outdated-relays" title="Permalink to this headline"></a></h1>
<a class="reference external image-reference" href="../double_double_toil_and_trouble.html"><img alt="../../_images/back.png" src="../../_images/back.png" /></a>
<p>Time marches on. Tor makes new releases, and at some point needs to drop
support for old ones. Below is the script we used on <a class="reference external" href="https://trac.torproject.org/9476">ticket 9476</a> to reach out
to relay operators that needed to upgrade.</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">stem.descriptor.remote</span> <span class="kn">import</span> <span class="n">DescriptorDownloader</span>
<span class="kn">from</span> <span class="nn">stem.version</span> <span class="kn">import</span> <span class="n">Version</span>
<span class="n">downloader</span> <span class="o">=</span> <span class="n">DescriptorDownloader</span><span class="p">()</span>
<span class="n">count</span><span class="p">,</span> <span class="n">with_contact</span> <span class="o">=</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot;Checking for outdated relays...&quot;</span><span class="p">)</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot;&quot;</span><span class="p">)</span>
<span class="k">for</span> <span class="n">desc</span> <span class="ow">in</span> <span class="n">downloader</span><span class="o">.</span><span class="n">get_server_descriptors</span><span class="p">():</span>
<span class="k">if</span> <span class="n">desc</span><span class="o">.</span><span class="n">tor_version</span> <span class="o">&lt;</span> <span class="n">Version</span><span class="p">(</span><span class="s">&#39;0.2.3.0&#39;</span><span class="p">):</span>
<span class="n">count</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="k">if</span> <span class="n">desc</span><span class="o">.</span><span class="n">contact</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s">&#39; </span><span class="si">%-15s</span><span class="s"> </span><span class="si">%s</span><span class="s">&#39;</span> <span class="o">%</span> <span class="p">(</span><span class="n">desc</span><span class="o">.</span><span class="n">tor_version</span><span class="p">,</span> <span class="n">desc</span><span class="o">.</span><span class="n">contact</span><span class="o">.</span><span class="n">decode</span><span class="p">(</span><span class="s">&quot;utf-8&quot;</span><span class="p">,</span> <span class="s">&quot;replace&quot;</span><span class="p">)))</span>
<span class="n">with_contact</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot;&quot;</span><span class="p">)</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot;</span><span class="si">%i</span><span class="s"> outdated relays found, </span><span class="si">%i</span><span class="s"> had contact information&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">count</span><span class="p">,</span> <span class="n">with_contact</span><span class="p">))</span>
</pre></div>
</div>
<div class="highlight-python"><pre>% python outdated_relays.py
Checking for outdated relays...
0.2.2.39 Random Person admin@gtr-10.de
0.2.2.36 dobrovich_psckaal at vietrievus dot ok
0.2.2.39 anonymous6 anonymous@mailinator.com
0.2.2.39 anonymous12 anonymous@mailinator.com
...
316 outdated relays found, 120 had contact information</pre>
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