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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/4336/">https://reviewboard.asterisk.org/r/4336/</a>
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<p style="margin-top: 0;">On January 14th, 2015, 1:06 p.m. CST, <b>rmudgett</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/4336/diff/2/?file=70536#file70536line2977" style="color: black; font-weight: bold; text-decoration: underline;">/branches/13/apps/app_dial.c</a>
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(Diff revision 2)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int dial_exec_full(struct ast_channel *chan, const char *data, struct ast_flags64 *peerflags, int *continue_exec)</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="tb"> </span><span class="tb"> </span><span class="k">if</span> <span class="p">(</span><span class="n">res</span> <span class="o">&&</span> <span class="o">!</span><span class="n">dial_end_raised</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;">Probably should set res9 and res on the gosub result conditions above then check res9 here since res may not be zero on entering the enclosing code block.</pre>
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<p>On January 15th, 2015, 9:10 a.m. CST, <b>Matt Jordan</b> wrote:</p>
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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;">I disagree. res9 is used to check the result of ast_app_exec_sub, and shouldn't be repurposed. res is used to check the overall success/failure.
The logic here should be correct. Even if res is non-zero upon entering this block, if we had raised the dial event previously, we would have set dial_end_raised. If we did not raise the dial end event previously, then dial_end_raised is 0 and we properly raise a dial end here.</pre>
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<p>On January 15th, 2015, 12:53 p.m. CST, <b>rmudgett</b> wrote:</p>
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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;">My point here was that the value of res may be nonzero before the gosub is run and not because of the GOSUB_RETVAL setting it to -1. In this case you could do a DialEnd with an unexpected gosub_result value. Look at the OPT_ANNOUNCE code above where it handles AST_FRAME_DTMF_END. ast_senddigit() could be changed to return a nonzero value that gets put into res.
If you don't want to repurpose res9 then create res5 for want of another horrid variable name. :)</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;">That's a completely different case. If res is set to -1 in OPT_ANNOUNCE, then we explicitly goto done, bypassing the GoSub logic in the first place. res will be 0 by the time it hits the macro/gosub blocks.
There is probably a completely separate bug to this one in that code (yay app_dial), but I don't want to mix the purpose of this review.
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<p>- Matt</p>
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<p>On January 14th, 2015, 12:07 p.m. CST, Matt Jordan wrote:</p>
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<div>Review request for Asterisk Developers.</div>
<div>By Matt Jordan.</div>
<p style="color: grey;"><i>Updated Jan. 14, 2015, 12:07 p.m.</i></p>
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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-24682">ASTERISK-24682</a>
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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;">The Dial application has some interesting options with the mid-call Macro (M) and GoSub (U) options. If the MACRO_RESULT/GOSUB_RESULT returns specific values, the Dial application will take some action upon the channels involved in the dial operation (such as hanging up a particular party, etc.) The Dial application ensures that a Stasis message is published in the event that MACRO_RESULT/GOSUB_RESULT returns a value that kills the dial operation, so that there is a corresponding DialEnd event published in AMI/ARI for the DialBegin event that preceeded it.
A bug exists where that same DialEnd event will be published on Stasis even if the value returned in MACRO_RESULT/GOSUB_RESULT is not one that the Dial application cares about. This causes two DialEnd events to be published - one with the MACRO_RESULT/GOSUB_RESULT and another with "ANSWERED" - which is all sorts of wrong.
This patch fixes the bug by ensuring that we only publish a DialEnd message to Stasis if the Dial application's mid-call Macro/GoSub returns something that Dial cares about.</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;">See https://reviewboard.asterisk.org/r/4337 for tests.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/branches/13/apps/app_dial.c <span style="color: grey">(430607)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/4336/diff/" style="margin-left: 3em;">View Diff</a></p>
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