Hi, Bernhard,
You are swapping the To and From header contents. This is not standard
SIP.
The response should carry the same To and From headers as the request.
Just remove the SIPTAG_FROM and SIPTAG_TO from your call to nua_respond
and
NUA should take care of it for you.
--JT
> From: "Bernhard Suttner" <sutt...@comdasys.com>
> Subject: [Sofia-sip-devel] Subscribe Answer with wrong tags
>
> Hi,
>
> we are using sofia-sip version 1.12.9 as a SIP Server and we receive the
> following SUBSCRIBE:
>
> SUBSCRIBE sip:3...@82.135.113.119 SIP/2.0
> Route: <sip:82.135.113.119:5062;lr>
> From: <sip:8...@82.135.113.119>;tag=15acae96-3
> To: <sip:3...@82.135.113.119>
> Call-ID: 3258637...@192.168.11.28
> CSeq: 20 SUBSCRIBE
> Contact: <sip:8...@192.168.11.28:5082>
> Max-Forwards: 70
> Event: presence
> Accept: application/pidf+xml
> Content-Length: 0
>
> Then we will answer with a Accepted with:
>
> nua_respond(nh, SIP_202_ACCEPTED,
> NUTAG_WITH_THIS(nua),
> SIPTAG_SUBSCRIPTION_STATE_STR(state_str),
> SIPTAG_FROM(sip->sip_to),
> SIPTAG_TO(sip->sip_from),
> SIPTAG_CONTACT_STR(contact_str),
> TAG_END());
>
> Sofia-SIP does generate the answer with:
>
> SIP/2.0 202 Accepted
> From: <sip:3...@82.135.113.119>
> To: <sip:8...@82.135.113.119>;tag=15acae96-3
> Call-ID: 3258637...@192.168.11.28
> CSeq: 20 SUBSCRIBE
> Contact: "user" <sip:8...@10.42.1.41>
> Expires: 3600
> User-Agent: ComdasysB2BUA5.0.1
> Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE,
> NOTIFY, REFER, UPDATE, REGISTER, INFO, PUBLISH
> Supported: precondition, timer, pref
> Allow-Events: talk, presence, presence.winfo, message-summary
> Subscription-State: active;expires=3600
> Content-Length: 0
>
> I see that there are 2 problems:
> 1. why is the From Tag not set?
> 2. why is the To Tag set to the From-Tag which we receive from the
> Subscribe?
>
> Later, if the server send a NOTIFY for this subscription, sofia-sip does
> add the FROM-Tag but I think the tags are still interchanged.
>
> Does somebody has an idea how to fix that issue?
>
> Thanks in advance!
>
> Best regards,
> Bernhard Suttner
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