Hi Jayesh A Sangpal,
According to the RFC 3261, the branch ID must always starts with the
"z9hG4bK" magic cookie.
Please look into the sec 8.1.1.7 of RFC 3261 for more detail.
Regards
Partha
------------------------------------------------------------------
R.Parthasarathi
Flextronics Software Systems (FSS)- B'lore- India
------------------------------------------------------------------
jayesh a sangpal
<[EMAIL PROTECTED]
.in> To
Sent by: [email protected]
sip-implementors- cc
[EMAIL PROTECTED]
ia.edu Subject
[Sip-implementors] Branch parameter
set to 0 in Via Hdr
03/05/2005 06:04
PM
Hi Experts,
I have a query...
Is there any significance of branch parameter value set to 0 in Via Hdr.
I am trying to call a UA registered to "voip.brujula.net".
When I am getting ACK , the one of the Via Branch is set to 0.
TIA,
Jayesh A Sangpal
D-Link India Ltd.
Bangalore
India
------------------------------------------------------------------------------------------------------------------------
INVITE sip:[EMAIL PROTECTED] SIP/2.0
Record-Route: <sip:[EMAIL PROTECTED];ftag=17515;lr=on>
Via: SIP/2.0/UDP 200.68.120.81;branch=z9hG4bK6eca.f85484d1.0
Via: SIP/2.0/UDP 202.62.83.106:5060;branch=z9hG4bK-8961
From: 8501505388 <sip:[EMAIL PROTECTED]>;tag=17515
To: <sip:[EMAIL PROTECTED]>
Call-ID: [EMAIL PROTECTED]
Contact: <sip:[EMAIL PROTECTED]:5060>
CSeq: 1 INVITE
Max-Forwards: 69
Content-Length: 119
Authorization: Digest
username="8501505388",realm="voip.brujula.net",nonce="4229a4e5ede761ac6fd8a33ce455667c384274a2",uri="sip:voip.brujula.net",algorithm=MD5,response="5b9253f6a995a2bba68979031cf47dda"
User-Agent: D-Link DPH80 (TW-3.120)
Content-Type: application/sdp
v=0
o=dlink 4526 9013 IN IP4 202.62.83.106
s=Session SDP
c=IN IP4 202.62.83.106
t=0 0
m=audio 6958 RTP/AVP 0 0 0
------------------------------------------------------------------------------------------------------------------------
SIP/2.0 200 OK
Call-ID: [EMAIL PROTECTED]
Contact: sip:[EMAIL PROTECTED]
Content-Length: 172
Content-Type: application/sdp
CSeq: 1 INVITE
From: 8501505388 <sip:[EMAIL PROTECTED]>;tag=17515
Max-Forwards: 70
Record-Route: <sip:[EMAIL PROTECTED];lr>
To: <sip:[EMAIL PROTECTED]>;tag=1
User-Agent: D-Link Mickey UA/Ver 3.66
Via: SIP/2.0/UDP 200.68.120.81;branch=z9hG4bK6eca.f85484d1.0
Via: SIP/2.0/UDP 202.62.83.106;branch=z9hG4bK-8961
v=0
o=dlink 9013 9013 IN IP4 192.168.10.154
s=Session SDP
c=IN IP4 192.168.10.154
t=0 0
m=audio 7020 RTP/AVP 0 96
a=rtpmap:96 telephone-event/8000/2
a=fmtp:96 0-15
---------------------------------------------------------------------------------------------------------------------
ACK sip:[EMAIL PROTECTED] SIP/2.0
Record-Route: <sip:[EMAIL PROTECTED];ftag=17515;lr=on>
Via: SIP/2.0/UDP 200.68.120.81;branch=0
Via: SIP/2.0/UDP 202.62.83.106:5060;branch=z9hG4bK-10476
From: 8501505388 <sip:[EMAIL PROTECTED]>;tag=17515
To: <sip:[EMAIL PROTECTED]>;tag=1
Call-ID: [EMAIL PROTECTED]
Contact: <sip:[EMAIL PROTECTED]:5060>
CSeq: 1 ACK
Max-Forwards: 69
Content-Length: 0
User-Agent: D-Link DPH80 (TW-3.120)
---------------------------------------------------------------------------------------------------------------------
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