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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/4536/">https://reviewboard.asterisk.org/r/4536/</a>
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<p style="margin-top: 0;">On April 7th, 2015, 10:46 a.m. CDT, <b>Matt Jordan</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/4536/diff/2/?file=73573#file73573line12365" style="color: black; font-weight: bold; text-decoration: underline;">trunk/channels/chan_iax2.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 iax2_poke_peer(struct iax2_peer *peer, int heldcall)</pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span>/* Queue up a new task to handle no reply */</pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span>/* If the host is already unreachable then use time less than the unreachable interval (to prevent concurrent POKEs). */</pre></td>
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<td bgcolor="#ffc5ce" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span>/* If the host is already unreachable then use the unreachable interval instead */</pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span>if (peer->lastms < 0)</pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span>if (peer->lastms < 0)</pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span>peer->pokeexpire = iax2_sched_add(sched, peer->pokefreqnotok, iax2_poke_noanswer, peer_ref(peer));</pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span>poke_timeout = peer->pokefreqnotok * 5 / 6;</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>/* If the host is reachable, increase timeout to allow for POKE retries. Also limit it to less than reachable interval (to prevent concurrent POKEs). */</pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span>else</pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span>else</pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span>peer->pokeexpire = iax2_sched_add(sched, DEFAULT_MAXMS * 2, iax2_poke_noanswer, peer_ref(peer));</pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span>poke_timeout = MIN(MAX_RETRY_TIME * 2 + peer->maxms, peer->pokefreqok * 5 / 6);</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>/* Queue up a new task to handle no reply */</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>peer->pokeexpire = iax2_sched_add(sched, poke_timeout, iax2_poke_noanswer, peer_ref(peer));</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;">I would put a comment in here explaining why the schedule times are chosen as they are. 5/6 feels arbitrary without some explanation.</pre>
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<p>On April 7th, 2015, 1:18 p.m. CDT, <b>Y Ateya</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;">Using *5/6 is **really** arbitrary; I just want number less than maximum value. This is used because POKE next cycle will be after {{pokefreqnotok}}, so I want current poke to expire before the next new poke is sent.
So which multiplier to use, 5/6, 9/10, 99/100, 9999/10000, ... etc. It needs to be something less than 1.
I chose 5/6 because it is used in registration renewals {{(5 * reg->refresh / 6)}}
What do you recommend to document this multiplier?</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 think your comment that it is somewhat arbitrary, but less than 1 and what we used with registration renewals is both accurate and satisfactory.</pre>
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<p>- Matt</p>
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<p>On April 3rd, 2015, 2:58 p.m. CDT, Y Ateya wrote:</p>
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<div>Review request for Asterisk Developers and rnewton.</div>
<div>By Y Ateya.</div>
<p style="color: grey;"><i>Updated April 3, 2015, 2:58 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-24894">ASTERISK-24894</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;">Increase POKE retry window from DEFAULT_MAXMS * 2 (4 seconds) to bigger number (derived from qualify time; which control POKE retry time).</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;">- Tried test with multiple qualify values (2 and 10 seconds).
- Tried test with 100% packets loss to ensure that when a POKE packet is dropped it will be retried couple of time before declaring client disconnected.</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/channels/chan_iax2.c <span style="color: grey">(432806)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/4536/diff/" style="margin-left: 3em;">View Diff</a></p>
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