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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/4556/">https://reviewboard.asterisk.org/r/4556/</a>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">In general, I'm going to say that while I understand that this code was adapted from old code in Asterisk, this is is dire need of comments, both in the form of doxygen and comments over individual sections in functions like resolver_parse_answer().
This could use some off-nominal tests, specifically to ensure that malformed DNS responses do not cause crashes or other unexpected behaviors.</pre>
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<a href="https://reviewboard.asterisk.org/r/4556/diff/1/?file=73337#file73337line270" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/res/res_resolver_system.c</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="k">if</span> <span class="p">(</span><span class="n">x</span> <span class="o">>=</span> <span class="n">len</span><span class="p">)</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span><span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Curly braces on if statements</pre>
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<a href="https://reviewboard.asterisk.org/r/4556/diff/1/?file=73337#file73337line310" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/res/res_resolver_system.c</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span><span class="n">ans</span> <span class="o">=</span> <span class="p">(</span><span class="k">struct</span> <span class="n">dn_answer</span> <span class="o">*</span><span class="p">)</span><span class="n">answer</span><span class="p">;</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">This has the same alignment concerns that I brought up in the SRV review.</pre>
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<a href="https://reviewboard.asterisk.org/r/4556/diff/1/?file=73337#file73337line320" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/res/res_resolver_system.c</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="k">if</span> <span class="p">(</span><span class="n">ast_dns_resolver_add_record</span><span class="p">(</span><span class="n">query</span><span class="p">,</span> <span class="n">ntohs</span><span class="p">(</span><span class="n">ans</span><span class="o">-></span><span class="n">rtype</span><span class="p">),</span> <span class="n">ntohs</span><span class="p">(</span><span class="n">ans</span><span class="o">-></span><span class="n">class</span><span class="p">),</span> <span class="n">ans</span><span class="o">-></span><span class="n">ttl</span><span class="p">,</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Unless there's something I've missed, this appears to be passing the TTL in network byte order instead of host byte order.
Add a check of the TTL in the nominal unit tests to be sure about this.</pre>
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<a href="https://reviewboard.asterisk.org/r/4556/diff/1/?file=73337#file73337line462" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/res/res_resolver_system.c</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cp">#define DNS_HEADER_SIZE 96</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">This isn't used.
(yes, this is present in the NAPTR and SRV tests as well. I just didn't catch it until now)</pre>
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<a href="https://reviewboard.asterisk.org/r/4556/diff/1/?file=73337#file73337line542" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/res/res_resolver_system.c</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="kt">char</span> <span class="n">v4_buf</span><span class="p">[</span><span class="n">V4_BUFSIZE</span><span class="p">];</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="kt">char</span> <span class="o">*</span><span class="n">ptr</span> <span class="o">=</span> <span class="n">buf</span><span class="p">;</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="n">inet_pton</span><span class="p">(</span><span class="n">AF_INET</span><span class="p">,</span> <span class="n">record</span><span class="o">-></span><span class="n">ip</span><span class="p">,</span> <span class="n">v4_buf</span><span class="p">);</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="n">memcpy</span><span class="p">(</span><span class="n">ptr</span><span class="p">,</span> <span class="o">&</span><span class="n">v4_buf</span><span class="p">,</span> <span class="n">V4_BUFSIZE</span><span class="p">);</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">The v4_buf isn't really needed here. You could just do:
inet_pton(AF_INET, record->ip, ptr);
ptr += V4_BUFSIZE;</pre>
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<a href="https://reviewboard.asterisk.org/r/4556/diff/1/?file=73337#file73337line555" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/res/res_resolver_system.c</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="k">static</span> <span class="k">enum</span> <span class="n">ast_test_result_state</span> <span class="nf">nominal_test</span><span class="p">(</span><span class="k">struct</span> <span class="n">ast_test</span> <span class="o">*</span><span class="n">test</span><span class="p">,</span> <span class="k">struct</span> <span class="n">a_record</span> <span class="o">*</span><span class="n">records</span><span class="p">,</span><span class="ew"> </span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">There is a red blob at the end of this line.</pre>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="n">aco_option_register</span><span class="p">(</span><span class="o">&</span><span class="n">cfg_info</span><span class="p">,</span> <span class="s">"max_size"</span><span class="p">,</span> <span class="n">ACO_EXACT</span><span class="p">,</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span><span class="n">threadpool_options</span><span class="p">,</span> <span class="s">"50"</span><span class="p">,</span> <span class="n">OPT_INT_T</span><span class="p">,</span> <span class="n">PARSE_IN_RANGE</span><span class="p">,</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span><span class="n">FLDSET</span><span class="p">(</span><span class="k">struct</span> <span class="n">resolver_threadpool_config</span><span class="p">,</span> <span class="n">max_size</span><span class="p">),</span> <span class="mi">0</span><span class="p">,</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span><span class="n">INT_MAX</span><span class="p">);</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Based on recent anecdotal experience, I think it's a good idea to impose a low maximum threadpool size for new threadpools we introduce. Something like 10 is probably a good default maximum (though even lower than that is probably fine).</pre>
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<p>- Mark Michelson</p>
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<p>On March 29th, 2015, 6:05 p.m. UTC, Joshua Colp wrote:</p>
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<div>Review request for Asterisk Developers.</div>
<div>By Joshua Colp.</div>
<p style="color: grey;"><i>Updated March 29, 2015, 6:05 p.m.</i></p>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
Asterisk
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">This change adds a res_resolver_system module which is a fallback for when libunbound is not available. It's a port of the dns.c code into the new core DNS API. While queries can be executed in an async fashion you can't cancel a query that is in progress. There are also unit tests which cover the parsing aspect of the code to make sure it works as expected.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Ran unit tests, they are happy.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/trunk/res/res_resolver_system.c <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/configs/samples/resolver_system.conf.sample <span style="color: grey">(PRE-CREATION)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/4556/diff/" style="margin-left: 3em;">View Diff</a></p>
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