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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/1699/">https://reviewboard.asterisk.org/r/1699/</a>
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<p style="margin-top: 0;">On January 27th, 2012, 1:44 p.m., <b>Alec Davis</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;">reference as to whether the CSeq number should be allowed to get up to 2^31 or 2^32
http://www.ietf.org/mail-archive/web/sip/current/msg10903.html
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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;">Okay, after reading that thread, I agree that the CSeq can use all 32 bits. The restriction is that a UAC, when starting a dialog, must choose a CSeq that is less than 2^31. This means that with our current INITIAL_CSEQ of 101, we're well within the guidelines.</pre>
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<p>- Mark</p>
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<p>On January 27th, 2012, 1:41 p.m., Alec Davis wrote:</p>
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<div>Review request for Asterisk Developers.</div>
<div>By Alec Davis.</div>
<p style="color: grey;"><i>Updated Jan. 27, 2012, 1:41 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;">By defining INITIAL_CSEQ to values near the maximum, it can clearly be seen that asterisk will represent the cseqno as negative numbers as %d is used in most places.
//#define INITIAL_CSEQ 101 /*!< Our initial sip sequence number */
#define INITIAL_CSEQ 2147483640 /*!< Our initial sip sequence number */
#define INITIAL_CSEQ 4294967290UL /*!< Our initial sip sequence number */
Examples below after a few messages with INITIAL_CSEQ set to 214783640
...
Call-ID: d469d55c9e9e81ae@192.168.y.yyy
CSeq: -2147483639 NOTIFY
User-Agent: Asterisk PBX SVN-trunk-r352864M
Subscription-State: active
Event: dialog
Content-Type: application/dialog-info+xml
Content-Length: 206
<?xml version="1.0"?>
<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="16" state="full" entity="sip:8612@192.168.x.xxx">
...
Call-ID: 7d1d964b7867eee008705e1e64386d4e@192.168.x.xxx:5060
CSeq: -5 NOTIFY
User-Agent: Asterisk PBX SVN-trunk-r352864M
Event: message-summary
Content-Type: application/simple-message-summary
Content-Length: 92
Messages-Waiting: no
Message-Account: sip:asterisk@192.168.x.xxx
Voice-Message: 0/0 (0/0)</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;">Noted that Notify for BLF and MWI, that the CSeq numbers now wrapped around to 0.
After using the 2nd maximum of 2^32 minus a few (#define INITIAL_CSEQ 4294967290UL) phones, BLF and MWI still workign as normal.
Previously the BLF would stop functioning after the minus values were reached.
Now it wraps around from 4294967295 to 0, as below.
Call-ID: c2aaba2919cfcd4a@192.168.y.yyy
CSeq: 4294967295 NOTIFY
User-Agent: Asterisk PBX SVN-trunk-r352864M
Subscription-State: active
Event: dialog
Content-Type: application/dialog-info+xml
Content-Length: 205
<?xml version="1.0"?>
<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="4" state="full" entity="sip:8612@192.168.x.xxx">
<dialog id="8612">
...
Call-ID: c2aaba2919cfcd4a@192.168.y.yyy
CSeq: 0 NOTIFY
User-Agent: Asterisk PBX SVN-trunk-r352864M
Subscription-State: active
Event: dialog
Content-Type: application/dialog-info+xml
Content-Length: 205
<?xml version="1.0"?>
<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="5" state="full" entity="sip:8612@192.168.x.xxx">
<dialog id="8612">
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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_sip.c <span style="color: grey">(352913)</span></li>
<li>trunk/channels/sip/include/dialog.h <span style="color: grey">(352913)</span></li>
<li>trunk/channels/sip/include/sip.h <span style="color: grey">(352913)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/1699/diff/" style="margin-left: 3em;">View Diff</a></p>
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