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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/2135/">https://reviewboard.asterisk.org/r/2135/</a>
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<a href="https://reviewboard.asterisk.org/r/2135/diff/4/?file=31884#file31884line1860" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/main/channel.c</a>
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(Diff revision 4)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">int ast_is_deferrable_frame(const struct ast_frame *frame)</pre></td>
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<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">1860</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">res</span> <span class="o">=</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;">Revert this. This is not an error or hangup exit. This is a normal exit because the condition terminated the wait.</pre>
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<a href="https://reviewboard.asterisk.org/r/2135/diff/4/?file=31884#file31884line3007" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/main/channel.c</a>
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(Diff revision 4)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">int __ast_answer(struct ast_channel *chan, unsigned int delay, int cdr_answer)</pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">res</span> <span class="o">=</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span></pre></td>
<th bgcolor="#f0f0f0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">3006</font></th>
<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">res</span> <span class="o">=</span> <span class="o">-</span><span class="mi">1</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; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">3007</font></th>
<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">"Error condition occurred when polling channel %s for a voice frame: %s</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">chan</span><span class="o">-></span><span class="n">name</span><span class="p">,</span> <span class="n">strerror</span><span class="p">(</span><span class="n">errno</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;">Swap these two lines to remove extraneous change.</pre>
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<a href="https://reviewboard.asterisk.org/r/2135/diff/4/?file=31884#file31884line4614" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/main/channel.c</a>
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(Diff revision 4)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">int ast_recvchar(struct ast_channel *chan, int timeout)</pre></td>
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<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">4603</font></th>
<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="n">ms</span><span class="p">)</span> <span class="p">{</span></pre></td>
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<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2">4601</font></th>
<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">break</span><span class="p">;</span></pre></td>
<th bgcolor="#f0f0f0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">4604</font></th>
<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">break</span><span class="p">;</span></pre></td>
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<th bgcolor="#e9eaa8" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2">4602</font></th>
<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">res</span> <span class="o">=</span> <span class="n">ast_waitfor</span><span class="p">(</span><span class="n">chan</span><span class="p">,</span> <span class="n">timeout</span><span class="p">);</span></pre></td>
<th bgcolor="#e9eaa8" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">4605</font></th>
<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <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;">Redundant code because the while already tests for it.</pre>
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<a href="https://reviewboard.asterisk.org/r/2135/diff/4/?file=31888#file31888line1510" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/res/res_fax.c</a>
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(Diff revision 4)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int receivefax_t38_init(struct ast_channel *chan, struct ast_fax_session_details *details)</pre></td>
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<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">1499</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">while</span> <span class="p">((</span><span class="n">ms</span> <span class="o">=</span> <span class="n">ast_remaining_ms</span><span class="p">(</span><span class="n">start</span><span class="p">,</span> <span class="n">timeout_ms</span><span class="p">)))</span> <span class="p">{</span></pre></td>
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<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2">1493</font></th>
<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">ms</span> <span class="o">=</span> <span class="n">ast_waitfor</span><span class="p">(</span><span class="n">chan</span><span class="p">,</span> <span class="n">ms</span><span class="p">);</span></pre></td>
<th bgcolor="#f0f0f0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">1500</font></th>
<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">ms</span> <span class="o">=</span> <span class="n">ast_waitfor</span><span class="p">(</span><span class="n">chan</span><span class="p">,</span> <span class="n">ms</span><span class="p">);</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">1501</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
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<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2">1494</font></th>
<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">ms</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span></pre></td>
<th bgcolor="#f0f0f0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">1502</font></th>
<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">ms</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</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;">Oops. This loop is screwed up. Look at the switch statement setting ms = 0 to exit the loop below.</pre>
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<a href="https://reviewboard.asterisk.org/r/2135/diff/4/?file=31888#file31888line1921" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/res/res_fax.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int sendfax_t38_init(struct ast_channel *chan, struct ast_fax_session_details *details)</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">1910</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">while</span> <span class="p">((</span><span class="n">ms</span> <span class="o">=</span> <span class="n">ast_remaining_ms</span><span class="p">(</span><span class="n">start</span><span class="p">,</span> <span class="n">timeout_ms</span><span class="p">)))</span> <span class="p">{</span></pre></td>
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<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2">1898</font></th>
<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">ms</span> <span class="o">=</span> <span class="n">ast_waitfor</span><span class="p">(</span><span class="n">chan</span><span class="p">,</span> <span class="n">ms</span><span class="p">);</span></pre></td>
<th bgcolor="#f0f0f0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">1911</font></th>
<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">ms</span> <span class="o">=</span> <span class="n">ast_waitfor</span><span class="p">(</span><span class="n">chan</span><span class="p">,</span> <span class="n">ms</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; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">1912</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
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<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2">1899</font></th>
<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">ms</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span></pre></td>
<th bgcolor="#f0f0f0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">1913</font></th>
<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">ms</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</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;">Oops. This loop is screwed up. Look at the switch statement setting ms=0 below.</pre>
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<a href="https://reviewboard.asterisk.org/r/2135/diff/4/?file=31888#file31888line1988" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/res/res_fax.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int sendfax_t38_init(struct ast_channel *chan, struct ast_fax_session_details *details)</pre></td>
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<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">1977</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">while</span> <span class="p">((</span><span class="n">ms</span> <span class="o">=</span> <span class="n">ast_remaining_ms</span><span class="p">(</span><span class="n">start</span><span class="p">,</span> <span class="n">timeout_ms</span><span class="p">)))</span> <span class="p">{</span></pre></td>
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<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2">1963</font></th>
<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">ms</span> <span class="o">=</span> <span class="n">ast_waitfor</span><span class="p">(</span><span class="n">chan</span><span class="p">,</span> <span class="n">ms</span><span class="p">);</span></pre></td>
<th bgcolor="#f0f0f0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">1978</font></th>
<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">ms</span> <span class="o">=</span> <span class="n">ast_waitfor</span><span class="p">(</span><span class="n">chan</span><span class="p">,</span> <span class="n">ms</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; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">1979</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
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<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2">1964</font></th>
<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">ms</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span></pre></td>
<th bgcolor="#f0f0f0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">1980</font></th>
<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">ms</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</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 loop is also messed up. The switch statement is setting ms=0 to exit early.</pre>
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<p>- rmudgett</p>
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<p>On October 16th, 2012, 5:17 p.m., Mark Michelson wrote:</p>
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<div>Review request for Asterisk Developers.</div>
<div>By Mark Michelson.</div>
<p style="color: grey;"><i>Updated Oct. 16, 2012, 5:17 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 is an interesting one. I filed issue ASTERISK-20375 a while back and David Lee fixed it. The problem was that in my setup, a call to ast_waitfor_nandfds() returned in less than a millisecond. The result was that the input-output value passed into ast_waitfor_nandfds() would never decrement the value properly. Thus a 3000 ms timeout would take *days* to actually time out.
David discovered that a similar pattern for determining the passage of time had been used throughout the code. This patch is an attempt to fix all of those. I've created a function in time.h called ast_remaining_ms() that will tell the amount of time remaining given a starting timestamp and the duration that the original timeout was. This is useful for determining the timeout to pass to an ast_waitfor() or related function.
Most of the changes here were straightforward, but there were some tricky bits. Focus strongly on the following changes:
1) wait_for_answer() in app_dial.c
2) wait_for_answer() in app_queue.c
3) generic_fax_exec() in res_fax.c
4) places where I have started setting "res" instead of "ms" or something similar in ast_waitfor() calls. Ensure that I have not tainted a return value. I found a few of these places while testing and fixed what I found on my own, but I could have missed some places.
5) places where a timeout is supposed to restart. I've tried to find these places, but I may have missed some.
In addition, there has been a change made to the return of ast_waitfor(). Prior to this patch, if a negative timeout were passed to ast_waitfor(), it would be impossible to return a negative value. This meant that it was impossible to detect if an error had occurred. I've changed ast_waitfor() to be able to return a negative value if a negative timeout is passed in, but only if the underlying call to ast_waitfor_nandfds() returns NULL.
I did this because I found many places in the code with this construct:
if (ast_waitfor(chan, -1) < 0) {
ast_log(LOG_ERROR, "ERMAHGERD!\n");
return HORRIBLE_ERROR_CONDITION;
}
The problem is that the error return could never actually be reached. It should be possible with my change. Please let me know if my change could cause problems though.</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;">I've placed many test calls through items that used timeouts like Dial and Queue with a timeout. I've also ensured that other apps that use ast_waitfor() such as Answer() and Echo() still function properly.</pre>
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<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="https://issues.asterisk.org/jira/browse/ASTERISK-20414">ASTERISK-20414</a>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/branches/1.8/apps/app_dial.c <span style="color: grey">(375025)</span></li>
<li>/branches/1.8/apps/app_jack.c <span style="color: grey">(374904)</span></li>
<li>/branches/1.8/apps/app_meetme.c <span style="color: grey">(374904)</span></li>
<li>/branches/1.8/apps/app_queue.c <span style="color: grey">(374904)</span></li>
<li>/branches/1.8/apps/app_record.c <span style="color: grey">(374904)</span></li>
<li>/branches/1.8/apps/app_waitforring.c <span style="color: grey">(374904)</span></li>
<li>/branches/1.8/channels/chan_agent.c <span style="color: grey">(374904)</span></li>
<li>/branches/1.8/channels/chan_dahdi.c <span style="color: grey">(374904)</span></li>
<li>/branches/1.8/channels/chan_iax2.c <span style="color: grey">(375025)</span></li>
<li>/branches/1.8/channels/sig_analog.c <span style="color: grey">(374904)</span></li>
<li>/branches/1.8/channels/sig_pri.c <span style="color: grey">(374904)</span></li>
<li>/branches/1.8/include/asterisk/channel.h <span style="color: grey">(374904)</span></li>
<li>/branches/1.8/include/asterisk/time.h <span style="color: grey">(374904)</span></li>
<li>/branches/1.8/main/channel.c <span style="color: grey">(374904)</span></li>
<li>/branches/1.8/main/pbx.c <span style="color: grey">(374904)</span></li>
<li>/branches/1.8/main/rtp_engine.c <span style="color: grey">(374904)</span></li>
<li>/branches/1.8/main/utils.c <span style="color: grey">(374904)</span></li>
<li>/branches/1.8/res/res_fax.c <span style="color: grey">(374904)</span></li>
</ul>
<p><a href="https://reviewboard.asterisk.org/r/2135/diff/" style="margin-left: 3em;">View Diff</a></p>
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