[SIPForum-discussion] Question about SUBSCRIBE method processing in proxy

Yevgen Krapiva ykrapiva at gmail.com
Fri Apr 17 08:55:58 UTC 2009


But I'm thinking about if proxy recognizes *special* requests but
doesn't support them then should it response Method Not Allowed or
just ignore and apply standart routing methods for them ?

I want to apply polite solution in my proxy.

2009/4/17, Tomasz Zieleniewski <tzieleniewski at gmail.com>:
> Hi,
> If the requestURI sip:user1 at kv-po-ykrapivanb.umc.com.ua
> is a correct AOR for this user and proxy doesn't provide service for this
> particular event package then it is completely normal behavior to send
> the request further to the destination.
> If proxy handles user domain then by making a query to location service
> and if not then by applying standard routing procedures.
> Kind regards,
> - Tomasz Zieleniewski
> 2009/4/16 Yevgen Krapiva <ykrapiva at gmail.com>:
>> Hi.
>> Here is short description of incoming SUBSCRIBE request:
>>>SUBSCRIBE sip:user1 at kv-po-ykrapivanb.umc.com.ua SIP/2.0
>>>Via: SIP/2.0/UDP
>>>Contact: <sip:user1 at>
>>>To: "user1" <sip:user1 at kv-po-ykrapivanb.umc.com.ua>
>>>From: "user1" <sip:user1 at kv-po-ykrapivanb.umc.com.ua>;tag=801dfd1e
>> I've found that if proxy doesn't understand such or similar methods,
>> it will forward this request back to sender because of RequestURI.
>> Then the sender will send reply (Event Package Not Supported) to
>> proxy, and proxy again will forward response to sender.
>> So, the sender is appeared to talk itself.
>> Is this normal operation ?
>> Thanks.
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