<html>
<body>
<div style="font-family: Verdana, Arial, Helvetica, Sans-Serif;">
<table bgcolor="#f9f3c9" width="100%" cellpadding="8" style="border: 1px #c9c399 solid;">
<tr>
<td>
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>
</td>
</tr>
</table>
<br />
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<p style="margin-top: 0;">On October 1st, 2012, 6:48 p.m., <b>rmudgett</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Enough for now will look more tomorrow.</pre>
</blockquote>
</blockquote>
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Thanks a bunch. I'll make the suggested changes and put up a new diff as soon as I can.</pre>
<br />
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<p style="margin-top: 0;">On October 1st, 2012, 6:48 p.m., <b>rmudgett</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<table width="100%" border="0" bgcolor="white" style="border: 1px solid #C0C0C0; border-collapse: collapse; margin: 2px padding: 2px;">
<thead>
<tr>
<th colspan="4" bgcolor="#F0F0F0" style="border-bottom: 1px solid #C0C0C0; font-size: 9pt; padding: 4px 8px; text-align: left;">
<a href="https://reviewboard.asterisk.org/r/2135/diff/1/?file=31500#file31500line1099" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/apps/app_dial.c</a>
<span style="font-weight: normal;">
(Diff revision 1)
</span>
</th>
</tr>
</thead>
<tbody style="background-color: #e4d9cb; padding: 4px 8px; text-align: center;">
<tr>
<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static struct ast_channel *wait_for_answer(struct ast_channel *in,</pre></td>
</tr>
</tbody>
<tbody>
<tr>
<th bgcolor="#e9eaa8" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2">1098</font></th>
<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">while</span> <span class="p">(</span><span class="o">*</span><span class="n">to</span> <span class="o">&&</span> <span class="o">!</span><span class="n">peer</span><span class="p">)</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">1099</font></th>
<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">while</span> <span class="p">((</span><span class="n">ast_tvdiff_ms</span><span class="p">(</span><span class="n">ast_tvnow</span><span class="p">(),</span> <span class="n">start</span><span class="p">)</span> <span class="o"><</span> <span class="n">orig</span> <span class="o">||</span> <span class="n">orig</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</span> <span class="o">&&</span> <span class="o">!</span><span class="n">peer</span><span class="p">)</span> <span class="p">{</span></pre></td>
</tr>
</tbody>
</table>
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Just change to:
while ((*to = ast_remaining_ms(start, orig)) && !peer) {
Then the following changes in this function can be reverted.</pre>
</blockquote>
</blockquote>
<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;">That's a great idea. I need to move the checks on lines 1631 and 1633 (lines 1629 and 1631 in the original) to outside the while loop.</pre>
<br />
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<p style="margin-top: 0;">On October 1st, 2012, 6:48 p.m., <b>rmudgett</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<table width="100%" border="0" bgcolor="white" style="border: 1px solid #C0C0C0; border-collapse: collapse; margin: 2px padding: 2px;">
<thead>
<tr>
<th colspan="4" bgcolor="#F0F0F0" style="border-bottom: 1px solid #C0C0C0; font-size: 9pt; padding: 4px 8px; text-align: left;">
<a href="https://reviewboard.asterisk.org/r/2135/diff/1/?file=31503#file31503line3492" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/apps/app_queue.c</a>
<span style="font-weight: normal;">
(Diff revision 1)
</span>
</th>
</tr>
</thead>
<tbody style="background-color: #e4d9cb; padding: 4px 8px; text-align: center;">
<tr>
<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static struct callattempt *wait_for_answer(struct queue_ent *qe, struct callattempt *outgoing, int *to, char *digit, int prebusies, int caller_disconnect, int forwardsallowed)</pre></td>
</tr>
</tbody>
<tbody>
<tr>
<th bgcolor="#e9eaa8" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2">3491</font></th>
<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">while</span> <span class="p">(</span><span class="o">*</span><span class="n">to</span> <span class="o">&&</span> <span class="o">!</span><span class="n">peer</span><span class="p">)</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">3492</font></th>
<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">while</span> <span class="p">((</span><span class="n">ast_tvdiff_ms</span><span class="p">(</span><span class="n">ast_tvnow</span><span class="p">(),</span> <span class="n">start_time_tv</span><span class="p">)</span> <span class="o"><</span> <span class="n">orig</span> <span class="o">||</span> <span class="n">orig</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</span> <span class="o">&&</span> <span class="o">!</span><span class="n">peer</span><span class="p">)</span> <span class="p">{</span></pre></td>
</tr>
</tbody>
</table>
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Change to:
while ((*to = ast_remaining_ms(start_time_tv, orig)) && !peer) {
Then many changes can be reverted in this function.</pre>
</blockquote>
</blockquote>
<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;">Same as for app_dial.</pre>
<br />
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<p style="margin-top: 0;">On October 1st, 2012, 6:48 p.m., <b>rmudgett</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<table width="100%" border="0" bgcolor="white" style="border: 1px solid #C0C0C0; border-collapse: collapse; margin: 2px padding: 2px;">
<thead>
<tr>
<th colspan="4" bgcolor="#F0F0F0" style="border-bottom: 1px solid #C0C0C0; font-size: 9pt; padding: 4px 8px; text-align: left;">
<a href="https://reviewboard.asterisk.org/r/2135/diff/1/?file=31503#file31503line3905" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/apps/app_queue.c</a>
<span style="font-weight: normal;">
(Diff revision 1)
</span>
</th>
</tr>
</thead>
<tbody style="background-color: #e4d9cb; padding: 4px 8px; text-align: center;">
<tr>
<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static struct callattempt *wait_for_answer(struct queue_ent *qe, struct callattempt *outgoing, int *to, char *digit, int prebusies, int caller_disconnect, int forwardsallowed)</pre></td>
</tr>
</tbody>
<tbody>
<tr>
<th bgcolor="#e9eaa8" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2">3903</font></th>
<td bgcolor="#fdfebc" 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">to</span><span class="p">)</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">3905</font></th>
<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">ast_remaining_ms</span><span class="p">(</span><span class="n">start_time_tv</span><span class="p">,</span> <span class="n">orig</span><span class="p">)</span> <span class="o"><=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span></pre></td>
</tr>
</tbody>
</table>
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Revertable
This also changed behavior if the timeout was infinite.</pre>
</blockquote>
</blockquote>
<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'll need to both revert this and move it outside the while loop.</pre>
<br />
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<p style="margin-top: 0;">On October 1st, 2012, 6:48 p.m., <b>rmudgett</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<table width="100%" border="0" bgcolor="white" style="border: 1px solid #C0C0C0; border-collapse: collapse; margin: 2px padding: 2px;">
<thead>
<tr>
<th colspan="4" bgcolor="#F0F0F0" style="border-bottom: 1px solid #C0C0C0; font-size: 9pt; padding: 4px 8px; text-align: left;">
<a href="https://reviewboard.asterisk.org/r/2135/diff/1/?file=31504#file31504line335" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/apps/app_record.c</a>
<span style="font-weight: normal;">
(Diff revision 1)
</span>
</th>
</tr>
</thead>
<tbody style="background-color: #e4d9cb; padding: 4px 8px; text-align: center;">
<tr>
<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int record_exec(struct ast_channel *chan, const char *data)</pre></td>
</tr>
</tbody>
<tbody>
<tr>
<th bgcolor="#e9eaa8" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2">334</font></th>
<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">maxduration</span> <span class="o">></span> <span class="mi">0</span><span class="p">)</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">335</font></th>
<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">while</span> <span class="p">(</span><span class="n">ast_tvdiff_ms</span><span class="p">(</span><span class="n">ast_tvnow</span><span class="p">(),</span> <span class="n">start</span><span class="p">)</span> <span class="o"><</span> <span class="n">maxduration</span> <span class="o">||</span> <span class="n">maxduration</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span></pre></td>
</tr>
</tbody>
</table>
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">How about
while (ms = ast_remaining_ms(start, maxduration)) {
This suggestion could be done many other places throughout this patch.</pre>
</blockquote>
</blockquote>
<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;">Sure, I'll scan for more places this can change as well.</pre>
<br />
<p>- Mark</p>
<br />
<p>On September 28th, 2012, 5:15 p.m., Mark Michelson wrote:</p>
<table bgcolor="#fefadf" width="100%" cellspacing="0" cellpadding="8" style="background-image: url('https://reviewboard.asterisk.org/media/rb/images/review_request_box_top_bg.png'); background-position: left top; background-repeat: repeat-x; border: 1px black solid;">
<tr>
<td>
<div>Review request for Asterisk Developers.</div>
<div>By Mark Michelson.</div>
<p style="color: grey;"><i>Updated Sept. 28, 2012, 5:15 p.m.</i></p>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: 1px solid #b8b5a0">
<tr>
<td>
<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>
</td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: 1px solid #b8b5a0">
<tr>
<td>
<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>
</td>
</tr>
</table>
<div style="margin-top: 1.5em;">
<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>
</div>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
<ul style="margin-left: 3em; padding-left: 0;">
<li>/branches/1.8/apps/app_dial.c <span style="color: grey">(373847)</span></li>
<li>/branches/1.8/apps/app_jack.c <span style="color: grey">(373847)</span></li>
<li>/branches/1.8/apps/app_meetme.c <span style="color: grey">(373847)</span></li>
<li>/branches/1.8/apps/app_queue.c <span style="color: grey">(373847)</span></li>
<li>/branches/1.8/apps/app_record.c <span style="color: grey">(373847)</span></li>
<li>/branches/1.8/apps/app_waitforring.c <span style="color: grey">(373847)</span></li>
<li>/branches/1.8/channels/chan_agent.c <span style="color: grey">(373847)</span></li>
<li>/branches/1.8/channels/chan_dahdi.c <span style="color: grey">(373847)</span></li>
<li>/branches/1.8/channels/chan_iax2.c <span style="color: grey">(373847)</span></li>
<li>/branches/1.8/channels/sig_analog.c <span style="color: grey">(373847)</span></li>
<li>/branches/1.8/channels/sig_pri.c <span style="color: grey">(373847)</span></li>
<li>/branches/1.8/include/asterisk/time.h <span style="color: grey">(373847)</span></li>
<li>/branches/1.8/main/channel.c <span style="color: grey">(373847)</span></li>
<li>/branches/1.8/main/pbx.c <span style="color: grey">(373847)</span></li>
<li>/branches/1.8/main/rtp_engine.c <span style="color: grey">(373847)</span></li>
<li>/branches/1.8/main/utils.c <span style="color: grey">(373847)</span></li>
<li>/branches/1.8/res/res_fax.c <span style="color: grey">(373847)</span></li>
</ul>
<p><a href="https://reviewboard.asterisk.org/r/2135/diff/" style="margin-left: 3em;">View Diff</a></p>
</td>
</tr>
</table>
</div>
</body>
</html>