[asterisk-bugs] [JIRA] (ASTERISK-26918) Failed Subscriptions with Expiry=0 Added and not Removed

Tue Apr 4 09:01:58 CDT 2017

    [ https://issues.asterisk.org/jira/browse/ASTERISK-26918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=236370#comment-236370 ] 

Asterisk Team commented on ASTERISK-26918:
------------------------------------------

Thanks for creating a report! The issue has entered the triage process. That means the issue will wait in this status until a Bug Marshal has an opportunity to review the issue. Once the issue has been reviewed you will receive comments regarding the next steps towards resolution.

A good first step is for you to review the [Asterisk Issue Guidelines|https://wiki.asterisk.org/wiki/display/AST/Asterisk+Issue+Guidelines] if you haven't already. The guidelines detail what is expected from an Asterisk issue report.

Then, if you are submitting a patch, please review the [Patch Contribution Process|https://wiki.asterisk.org/wiki/display/AST/Patch+Contribution+Process].

> Failed Subscriptions with Expiry=0 Added and not Removed
> --------------------------------------------------------
>
>                 Key: ASTERISK-26918
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26918
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>    Affects Versions: 14.3.0
>            Reporter: Peter Sokolov
>            Severity: Minor
>
> When there is a hint defined in the dialplan without the endpoint, like for example:
> exten => 20,hint,
> There are two problems:
> 1.
> When the phone tries to subscribe using the following procedure, asterisk returns 500 Unhandled by dialog usages, however the subscription 313439313239363331303239333235-s29drryc0xcm is still added to the list with Expiry=0 and remains there forever:
> SUBSCRIBE sip:[2a00:x:x:x::3]:5060 SIP/2.0
> v: SIP/2.0/UDP [2a03:x:x:x:x:x:x:2033]:38047;branch=z9hG4bK-xq7t9dpznq15;rport
> f: <sip:14 at mydom.com>;tag=z6o87pp1q1
> t: <sip:20 at mydom.com>;tag=8f19e7a5-7a1c-4ce0-895d-19cfa68434ab;user=phone
> i: 313439313239363331303239333235-s29drryc0xcm
> CSeq: 63 SUBSCRIBE
> Max-Forwards: 70
> User-Agent: snomD315/8.9.3.46
> m: <sip:14@[2a03:x:x:x:x:x:x:2033]:38047;line=9hfshly5>;reg-id=1
> Event: dialog
> Accept: application/dialog-info+xml
> Authorization: Digest username="14",realm="mydom.com",nonce="1491296310/2488784f3804a67ae5a0ef5cf7c2cb98",uri="sip:20 at mydom.com",qop=auth,nc=00000004,cnonce="532c5a80",response="9cf105591e91cd13137587b287eab098",opaque="29538d6c2567dee4",algorithm=MD5
> Expires: 600
> l: 0
> Received from Udp:[2a00:x:x:x::3]:5060 on Udp:[2a03:x:x:x:x:x:x:2033]:38047 at Apr 4 11:05:08.714 (428 bytes):
> SIP/2.0 500 Unhandled by dialog usages
> v: SIP/2.0/UDP [2a03:x:x:x:x:x:x:2033]:38047;rport=38047;received=2a03:x:x:x:x:x:x:2033;branch=z9hG4bK-xq7t9dpznq15
> i: 313439313239363331303239333235-s29drryc0xcm
> f: <sip:14 at mydom.com>;tag=z6o87pp1q1
> t: <sip:20 at mydom.com>;tag=8f19e7a5-7a1c-4ce0-895d-19cfa68434ab;user=phone
> CSeq: 63 SUBSCRIBE
> Server: asterisk
> l: 0
> 2.
> When the phone then tries to subscribe using the alternative procedure, asterisk returns 200 OK and the subscription succeeds. It is added to the list with its correct Expiry, hovever remains there forever even when expiration time is reached:
> Sent to Udp:[2a00:x:x:x::3]:5060 from Udp:[2a03:x:x:x:x:x:x:2033]:38047 at Apr 4 11:05:23.792 (767 bytes):
> SUBSCRIBE sip:20 at mydom.com SIP/2.0
> v: SIP/2.0/UDP [2a03:x:x:x:x:x:x:2033]:38047;branch=z9hG4bK-5wcx0sygsfyq;rport
> f: <sip:14 at mydom.com>;tag=cjddyojr6y
> t: <sip:20 at mydom.com>;user=phone
> i: 313439313239363732333435353736-l9luhb32s4wh
> CSeq: 65 SUBSCRIBE
> Max-Forwards: 70
> User-Agent: snomD315/8.9.3.46
> m: <sip:14@[2a03:x:x:x:x:x:x:2033]:38047;line=9hfshly5>;reg-id=1
> Event: dialog
> Accept: application/dialog-info+xml
> Authorization: Digest username="14",realm="mydom.com",nonce="1491296723/d5fd7a6aa9318a82a01deb959883dd4d",uri="sip:20 at mydom.com",qop=auth,nc=00000001,cnonce="3ea0d05e",response="f37da1f9b16d2434ea4ed48d896e6232",opaque="4334bf9753276797",algorithm=MD5
> Expires: 600
> l: 0
> Received from Udp:[2a00:x:x:x::3]:5060 on Udp:[2a03:x:x:x:x:x:x:2033]:38047 at Apr 4 11:05:23.960 (607 bytes):
> SIP/2.0 200 OK
> v: SIP/2.0/UDP [2a03:x:x:x:x:x:x:2033]:38047;rport=38047;received=2a03:x:x:x:x:x:x:2033;branch=z9hG4bK-5wcx0sygsfyq
> i: 313439313239363732333435353736-l9luhb32s4wh
> f: <sip:14 at mydom.com>;tag=cjddyojr6y
> t: <sip:20 at mydom.com>;tag=aa52a882-ebaf-412a-86c5-eaa59906448b;user=phone
> CSeq: 65 SUBSCRIBE
> Expires: 600
> m: <sip:[2a00:x:x:x::3]:5060>
> Allow: OPTIONS, SUBSCRIBE, NOTIFY, PUBLISH, INVITE, ACK, BYE, CANCEL, UPDATE, PRACK, REGISTER, MESSAGE, REFER
> k: 100rel, timer, replaces, norefersub
> Server: asterisk
> l: 0
> I am seeing the list of subscriptions growing all the time by about 500 entries each 24 hours.
> The workaround I could find is to remove these hints from the dialplan. However then the subscription requests fail and the clients start to retry those subscriptions every few seconds increasing asterisk traffic and load.
> ASTERISK-26696 has resolved some issues with the subscriptions, however not the two mentioned above which are present in 14.3.0, 14.4.0-rc2.

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