Subject: [Simple] Event

From: Sudipta Ghosh <[email-masked]>
Date: Fri, 06 Dec 2002 15:59:12 +0530

Hi,
When IM Client is sending a SUBSCRIPTION request( to a offline user )
for presence notification to proxy,proxy sends response with 200 OK but
adds a event header.

Whats the meaning of it.

In REGISTER request there is also a Event header.
I am sending the packets.(got from MSN Messenger communication service)

SUBSCRIBE sip:[email-masked] SIP/2.0
Via: SIP/2.0/TCP 10.140.13.178:9172
From: "i" <sip:[email-masked]>;tag=5a9e885b-5af7-45b4-ad41-33eb48ae6a99

To: <sip:[email-masked]>
Call-ID: [email-masked]
CSeq: 1 SUBSCRIBE
Contact: <sip:10.140.13.178:9172;transport=tcp>
User-Agent: Windows RTC/1.0
Expires: 1800
Content-Length: 0

SIP/2.0 200 OK
Via: SIP/2.0/TCP 10.140.13.178:9172;received-port=5060
To: sip:[email-masked];tag=UKXBY32U8GYZBRWM
CSeq: 1 SUBSCRIBE
From: "i" <sip:[email-masked]>;tag=5a9e885b-5af7-45b4-ad41-33eb48ae6a99

Call-ID: [email-masked]
Event: presence
Expires: 1800
Content-Length: 0

REGISTER sip:10.140.13.149 SIP/2.0
Via: SIP/2.0/TCP 10.140.13.178:9172
From: <sip:[email-masked]>;tag=de061b7a-5964-43d5-a297-099e5d6e9796
To: <sip:[email-masked]>
Call-ID: [email-masked]
CSeq: 1 REGISTER
Contact: <sip:10.140.13.178:9172;transport=tcp>;methods="INVITE,
MESSAGE, INFO, SUBSCRIBE, OPTIONS, BYE, CANCEL, NOTIFY, ACK"
User-Agent: Windows RTC/1.0
Expires: 1200
Event: registration
Allow-Events: presence
Content-Length: 0
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