[reSIProcate] Can sip ACK be used for Register response

["Yuan, Frank" <Frank.Yuan@xxxxxxxxxxx>]

Hi All,

 

As far as I know that SIP ACK is used only for final response of INVITE msg, but LinkSys PAP2 used it for Register response.

 

Are there any SIP RFCs to allow it?

 

Here is the sip trace:

 

[04/28/07 05:34:14.775975](sipServer00|3697826736)Rcv Stack Msg:

REGISTER sip:sip01.mynetfone.com.au SIP/2.0^M

Via: SIP/2.0/UDP 124.189.51.79:5060;branch=z9hG4bK-8310ea79^M

Max-Forwards: 70^M

Contact: 09123994 <sip:09123994@xxxxxxxxxxxxx:5060>;expires=240^M

To: 09123994 <sip:09123994@xxxxxxxxxxxxxxxxxxxxxx>^M

From: 09123994 <sip:09123994@xxxxxxxxxxxxxxxxxxxxxx>;tag=2d656c4829c17b7ao0^M

Call-ID: b3bb7dca-a99dbfba@xxxxxxxxxxxxx^M

CSeq: 62263 REGISTER^M

Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER^M

Supported: x-sipura^M

User-Agent: Linksys/PAP2-3.1.9(LSc)^M

Content-Length: 0^M

 

[04/28/07 05:34:14.776328](sipServer00|4050291632)CallObj 266 Id b3bb7dca-a99dbf

ba@xxxxxxxxxxxxx snd SIP STATUS 401 Msg

SIP/2.0 401 Unauthorized^M

Via: SIP/2.0/UDP 124.189.51.79:5060;branch=z9hG4bK-8310ea79^M

To: "09123994"<sip:09123994@xxxxxxxxxxxxxxxxxxxxxx>^M

From: <sip:09123994@xxxxxxxxxxxxxxxxxxxxxx>;tag=2d656c4829c17b7ao0^M

Call-ID: b3bb7dca-a99dbfba@xxxxxxxxxxxxx^M

CSeq: 62263 REGISTER^M

User-Agent: EN2.5.23^M

WWW-Authenticate: Digest nonce="626791f8_00266",realm="my.com",algorithm=MD5^M

Content-Length: 0^M

 

[04/28/07 05:32:14.799145](sipServer00|3697826736)Rcv Stack Msg:

ACK sip:09123994@xxxxxxxxxxxxxxxxxxxxxx SIP/2.0^M

Via: SIP/2.0/UDP 124.189.51.79:5060;branch=z9hG4bK-49c0bda0^M

To: "09123994" <sip:09123994@xxxxxxxxxxxxxxxxxxxxxx>^M

From: <sip:09123994@xxxxxxxxxxxxxxxxxxxxxx>;tag=2d656c4829c17b7ao0^M

Call-ID: b3bb7dca-a99dbfba@xxxxxxxxxxxxx^M

CSeq: 62261 ACK^M

Content-Length: 0^M

^M

 

Regards,

 

Frank Y