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<p style="margin-top: 0;">On April 3rd, 2012, 1:51 p.m., <b>Mark Michelson</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1840/diff/1/?file=26988#file26988line2641" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/config.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">int ast_parse_arg(const char *arg, enum ast_parse_flags flags,</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">flags</span> <span class="o">&</span> <span class="n">PARSE_RANGE_DEFAULTS</span><span class="p">)</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="k">if</span> <span class="p">(</span><span class="n">x</span> <span class="o"><</span> <span class="n">low</span><span class="p">)</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="n">def</span> <span class="o">=</span> <span class="n">low</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="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="n">x</span> <span class="o">></span> <span class="n">high</span><span class="p">)</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="n">def</span> <span class="o">=</span> <span class="n">high</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="p">}</span></pre></td>
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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;">This is making the assumption that, given a possible range of values, the range bounds correspond to the default values. Is this a safe assumption to be making? For instance, with RTP port range settings, the range boundaries are from 1-65535. However, the default settings for RTP port range is 10000-20000. When using PARSE_RANGE_DEFAULTS, you need to specify both the bounds for the range AND separate default low and high values.</pre>
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<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">This option is only for setting a default value when there is a parsing error due to something being out of range. It isn't for defining a default range. rtp.conf has rtpstart/rtpend options. Unless I am misunderstanding, I don't think having bounds for both the range and high/low defaults makes sense since the high/low settings are separate options. The idea behind this options is that you set the default value initially when creating the config object, then if someone comes in and specifically overrides it with an out of range value, it gets set to the lowest/highest value allowable depending on which side of the range they are on. If someone just wants to set it to the default value on error, they would use the PARSE_DEFAULT flag instead.
It should be theoretically possible to use PARSE_DEFAULT and PARSE_RANGE_DEFAULTS for setting a different default if there was a range error or parse error, but I'm not sure that is useful. It also looks like strtoul isn't being checked for an error (0 return with errno set) and additional range checking could be done.</pre>
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<p style="margin-top: 0;">On April 3rd, 2012, 1:51 p.m., <b>Mark Michelson</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1840/diff/1/?file=26989#file26989line1350" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/udptl.c</a>
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<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static char *handle_cli_show_config(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="s">" Dispaly udptl configuration options</span><span class="se">\n</span><span class="s">"</span><span class="p">;</span></pre></td>
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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;">s/Dispaly/Display/
s/udptl/UDPTL/</pre>
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<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Will do.</pre>
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<p style="margin-top: 0;">On April 3rd, 2012, 1:51 p.m., <b>Mark Michelson</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1840/diff/1/?file=26989#file26989line1438" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/udptl.c</a>
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<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static char *handle_cli_show_config(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="p">(</span><span class="n">cfg</span> <span class="o">==</span> <span class="n">CONFIG_STATUS_FILEMISSING</span> <span class="o">||</span> <span class="n">cfg</span> <span class="o">==</span> <span class="n">CONFIG_STATUS_FILEINVALID</span><span class="p">))</span> <span class="p">{</span></pre></td>
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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;">You should invert this if statement here so that the failure case can duck out early. This way the actual meat of the function can be backed off one level of indentation.</pre>
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<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">I originally tried something kind of like that and backed out of it. I think I thought I'd have to duplicate some code or something...who knows. I was probably sleepy. Looks like a goto will make things work.</pre>
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<p style="margin-top: 0;">On April 3rd, 2012, 1:51 p.m., <b>Mark Michelson</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1840/diff/1/?file=26989#file26989line1441" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/udptl.c</a>
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<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static char *handle_cli_show_config(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">ast_parse_arg</span><span class="p">(</span><span class="n">v</span><span class="o">-></span><span class="n">value</span><span class="p">,</span> <span class="n">PARSE_UINT32</span> <span class="o">|</span> <span class="n">PARSE_IN_RANGE</span> <span class="o">|</span> <span class="n">PARSE_DEFAULT</span><span class="p">,</span> <span class="o">&</span><span class="n">newopts</span><span class="o">-></span><span class="n">start</span><span class="p">,</span> <span class="n">DEFAULT_UDPTLSTART</span><span class="p">,</span> <span class="mi">1024</span><span class="p">,</span> <span class="mi">65535</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="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">strcasecmp</span><span class="p">(</span><span class="n">v</span><span class="o">-></span><span class="n">name</span><span class="p">,</span> <span class="s">"udptlend"</span><span class="p">))</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="n">ast_parse_arg</span><span class="p">(</span><span class="n">v</span><span class="o">-></span><span class="n">value</span><span class="p">,</span> <span class="n">PARSE_UINT32</span> <span class="o">|</span> <span class="n">PARSE_IN_RANGE</span> <span class="o">|</span> <span class="n">PARSE_DEFAULT</span><span class="p">,</span> <span class="o">&</span><span class="n">newopts</span><span class="o">-></span><span class="n">end</span><span class="p">,</span> <span class="n">DEFAULT_UDPTLEND</span><span class="p">,</span> <span class="mi">1024</span><span class="p">,</span> <span class="mi">65535</span><span class="p">);</span></pre></td>
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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 the case that an out-of-range value is given to ast_parse_arg, it will return -1 instead of 0. You can check the return here and emit a warning message if the value had to be adjusted.</pre>
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<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Will do.</pre>
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<p style="margin-top: 0;">On April 3rd, 2012, 1:51 p.m., <b>Mark Michelson</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1840/diff/1/?file=26989#file26989line1498" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/udptl.c</a>
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<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static char *handle_cli_show_config(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">}</span> <span class="k">else</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="n">ast_log</span><span class="p">(</span><span class="n">LOG_WARNING</span><span class="p">,</span> <span class="s">"Invalid or missing udptl.conf, using default values</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span></pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">}</span></pre></td>
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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;">This feels wrong. During a reload, if the config file is broken in some way, shouldn't the old options be left alone instead of being replaced with the defaults?</pre>
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<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Yes. Defaults should really only be set on initial load instead of load/reload. I'll fix. Thanks.</pre>
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<p>- Terry</p>
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<p>On April 2nd, 2012, 2:06 p.m., Terry Wilson wrote:</p>
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<div>Review request for Asterisk Developers and Matt Jordan.</div>
<div>By Terry Wilson.</div>
<p style="color: grey;"><i>Updated April 2, 2012, 2:06 p.m.</i></p>
<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 patch builds off of https://reviewboard.asterisk.org/r/1455/.
The differences are:
1) Uses the global ao2 object API to store config values and to make reloads thread-safe
2) Uses ast_parse_arg() where appropriate
3) Updates ast_parse_arg to be able to set defaults to the min/max range value on range errors
4) Adds CLI command 'udptl show config'</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;">1) Used the new 'udptl show config' command to verify that settings looked right on load/reload.
2) Did testing with 'memory show summary config.c/udptl.c' with loads/reloads to verify there are no leaks
3) Loaded with no config file to verify that default values were used</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/include/asterisk/config.h <span style="color: grey">(360980)</span></li>
<li>/trunk/main/config.c <span style="color: grey">(360980)</span></li>
<li>/trunk/main/udptl.c <span style="color: grey">(360980)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/1840/diff/" style="margin-left: 3em;">View Diff</a></p>
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