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List: asterisk-dev
Subject: Re: [asterisk-dev] [Code Review] SIP session timers: Add Require: timer to appropriate responses
From: "Olle E Johansson" <reviewboard () asterisk ! org>
Date: 2012-10-31 16:58:36
Message-ID: 20121031165836.14391.80808 () hotblack ! digium ! com
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@matt: I did not require anything or refer to any policy. Please calm down.
Now, do we parse incoming Require: headers to our INVITE? That part is also in my \
code. If the other side does NOT add a Require header we're running stand-alone mode, \
but can still activate session timers. If the other side adds a Require header, we're \
in the play.
- Olle E
On Oct. 31, 2012, 11:05 a.m., Mark Michelson wrote:
>
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviewboard.asterisk.org/r/2172/
> -----------------------------------------------------------
>
> (Updated Oct. 31, 2012, 11:05 a.m.)
>
>
> Review request for Asterisk Developers.
>
>
> Summary
> -------
>
> This patch makes it so Asterisk adds Require: timer when appropriate when sending \
> INVITE responses.
> If session timers are in use, then there are two situations under which we'll add \
> the header:
> 1) We are sending a 200 OK with a Session-Expires header that has a refresher \
> parameter of "uac" 2) We are sending a 200 OK with a Session-Expires header that \
> has a refresher parameter of "uas" and the INVITE to which we are responding had a \
> Supported: timer header in it.
> This patch also introduces another change. Prior to this change, the only way we \
> would add a Session-Expires header in an INVITE response was if the inbound INVITE \
> had a Supported: timer header in it. Now we always add this header if Asterisk \
> using session-timers=originate. This is based on a table in section 9 of RFC 4028. \
> It indicates that if the UAC does not support Session-Timers but the UAS does, then \
> the UAS should send a Session-Expires header with a refresher parameter of "uas".
>
> This addresses bug ASTERISK-20570.
> https://issues.asterisk.org/jira/browse/ASTERISK-20570
>
>
> Diffs
> -----
>
> /branches/1.8/channels/chan_sip.c 375481
> /branches/1.8/channels/sip/include/sip.h 375481
>
> Diff: https://reviewboard.asterisk.org/r/2172/diff
>
>
> Testing
> -------
>
> Tried the following three scenarios that should have resulted in Asterisk sending a \
> 200 OK with a Require: timer:
> 1. INVITE with refresher=uac
> 2. INVITE with refresher=uas
> 3. INVITE with no Session-Expires but with Supported: timer
>
> I also tried the following scenario that should result in a 200 OK with a \
> Session-Expires (refresher=uas) but no Require: timer header:
> INVITE with no Supported: timer header present.
>
> I plan on turning this into a testsuite test as well.
>
>
> Thanks,
>
> Mark
>
>
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This is an automatically generated e-mail. To reply, visit:
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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;">@matt: I did not require \
anything or refer to any policy. Please calm down.
Now, do we parse incoming Require: headers to our INVITE? That part is also in my \
code. If the other side does NOT add a Require header we're running stand-alone \
mode, but can still activate session timers. If the other side adds a Require header, \
we're in the play.</pre> <br />
<p>- Olle E</p>
<br />
<p>On October 31st, 2012, 11:05 a.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. 31, 2012, 11:05 a.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 patch makes it so Asterisk adds Require: timer when appropriate \
when sending INVITE responses.
If session timers are in use, then there are two situations under which we'll add \
the header:
1) We are sending a 200 OK with a Session-Expires header that has a refresher \
parameter of "uac" 2) We are sending a 200 OK with a Session-Expires header \
that has a refresher parameter of "uas" and the INVITE to which we are \
responding had a Supported: timer header in it.
This patch also introduces another change. Prior to this change, the only way we \
would add a Session-Expires header in an INVITE response was if the inbound INVITE \
had a Supported: timer header in it. Now we always add this header if Asterisk using \
session-timers=originate. This is based on a table in section 9 of RFC 4028. It \
indicates that if the UAC does not support Session-Timers but the UAS does, then the \
UAS should send a Session-Expires header with a refresher parameter of \
"uas".</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;">Tried the following three scenarios that should have resulted in \
Asterisk sending a 200 OK with a Require: timer:
1. INVITE with refresher=uac
2. INVITE with refresher=uas
3. INVITE with no Session-Expires but with Supported: timer
I also tried the following scenario that should result in a 200 OK with a \
Session-Expires (refresher=uas) but no Require: timer header:
INVITE with no Supported: timer header present.
I plan on turning this into a testsuite test as well.</pre>
</td>
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<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-20570">ASTERISK-20570</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/channels/chan_sip.c <span style="color: grey">(375481)</span></li>
<li>/branches/1.8/channels/sip/include/sip.h <span style="color: \
grey">(375481)</span></li>
</ul>
<p><a href="https://reviewboard.asterisk.org/r/2172/diff/" style="margin-left: \
3em;">View Diff</a></p>
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