[asterisk-users] SIP/2.0 489 Bad Event in reply to a PUBLISH

[Joshua C. Colp]

On Mon, Mar 23, 2020 at 7:15 AM John Hughes <john at calva.com> wrote:

> Hi, in these dark days of COVID-19 lockdown I'm using linphone to
> connect to my office asterisk system for working from home.
>
> It's going pretty well but the presence/BLF functions don't appear to work.
>
> In the linphone logs and asterisk debug I find that asterisk is
> rejecting linphone's PUBLISH message:
>
> <--- SIP read from UDP:10.27.128.3:5060 --->
> PUBLISH sip:john at xxx.xxx.com SIP/2.0
> Via: SIP/2.0/UDP 10.27.128.3:5060;branch=z9hG4bK.GRd5yC7Wo;rport
> From: <sip:john at xxx.xxx.com>;tag=ZtFgBTxUL
> To: sip:john at xxx.xxx.com
> CSeq: 20 PUBLISH
> Call-ID: SMHLUSLJD6
> Max-Forwards: 70
> Supported: replaces, outbound
> Event: presence
> Accept: application/pidf+xml
> Content-Length: 511
> Content-Type: application/pidf+xml
> Expires: 3600
> User-Agent: Linphone/3.12.0 (belle-sip/1.6.3)
>
> <?xml version="1.0" encoding="UTF-8"?>
> <presence xmlns:dm="urn:ietf:params:xml:ns:pidf:data-model"
> xmlns:rpid="urn:ietf:params:xml:ns:pidf:rpid"
> xmlns:pidfonline="http://www.linphone.org/xsds/pidfonline.xsd"
> entity="sip:john at xxx.xxx.com" xmlns="urn:ietf:params:xml:ns:pidf">
> <tuple id="bhhmlg"> <status> <basic>open</basic> <pidfonline:online/>
> </status> <contact priority="0.8">sip:john at xxx.xxx.com</contact>
> <timestamp>2020-03-23T09:40:43Z</timestamp> </tuple>
> </presence>
> <------------->
> --- (14 headers 3 lines) ---
>
>
> Sending to 10.27.128.3:5060 (no NAT)
>
> <--- Transmitting (no NAT) to 10.27.128.3:5060 --->
> SIP/2.0 489 Bad Event
> Via: SIP/2.0/UDP
> 10.27.128.3:5060;branch=z9hG4bK.GRd5yC7Wo;received=10.27.128.3;rport=5060
> From: <sip:john at xxx.xxx.com>;tag=ZtFgBTxUL
> To: sip:john at xxx.xxx.com;tag=as674d428f
> Call-ID: SMHLUSLJD6
> CSeq: 20 PUBLISH
> Server: Asterisk PBX 13.14.1~dfsg-2+deb9u4
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY,
> INFO, PUBLISH, MESSAGE
> Supported: replaces, timer
> Content-Length: 0
>
> I can find nothing in the asterisk logs that says *why* it doesn't like
> the publish.
>
> Help?
>

Asterisk has no support for receiving/storing/using such a PUBLISH message.
Asterisk instead generates state itself based on whether something is on
the phone, busy, etc. This is received using a SUBSCRIBE and NOTIFY.

-- 
Joshua C. Colp
Asterisk Technical Lead
Sangoma Technologies
Check us out at www.sangoma.com and www.asterisk.org
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