[Linphone-developers] (iOS client) SIP Registration contact header length too long

[Richard Zinn]

Hi, I'm hearing from my SIP provider that the CONTACT header when using TCP (as opposed to UDP for our iOS client) is too long (over 300 characters).  The highlighted portion in yellow is what they are saying is too long.  Is there any way from the iOS client that I can control what is used as the CONTACT header portion?  Or limit this down potentially?

Thanks...

Here is an example of one that is too long using TCP:

REGISTER sip:fp.layered.net SIP/2.0.

Via: SIP/2.0/TCP 192.168.1.19:60274;alias;branch=z9hG4bK.Rdolm7ESv;rport.

From: <sip:address@hidden>;tag=2Mlka3aE7.

To: sip:address@hidden.

CSeq: 22 REGISTER.

Call-ID: ycHdGCTXT4.

Max-Forwards: 70.

Supported: replaces, outbound.

Contact: <sip:address@hidden:60274;app-id=com.freedompop.freedompoptalkandtext.dev;pn-type=apple;pn-tok=F573241586827F2B496C93700E1DC867D5BD70D08455BD27655C2D167B7095DB;pn-msg-str=IC_SIL;pn-call-str=IC_SIL;pn-call-snd=empty;pn-msg-snd=msg.caf;transport=tcp>;+sip.instance="<urn:uuid:1888789c-b9a2-4074-a04c-a78b05e9759e>".

And here is an example of one that uses UDP is an acceptable size:

REGISTER sip:fp.layered.net SIP/2.0.

Via: SIP/2.0/UDP 50.13.138.204:53961;rport;branch=z9hG4bKPj4Vv5VYWSao0JKS6lWubMhnZV9mJcL7kY.

Route: <sip:fp.layered.net;transport=udp;lr>.

Max-Forwards: 70.

From: <sip:address@hidden>;tag=JNUsZFjy5hf5uBAOOPJoTWyJRsBL7cX6.

To: <sip:address@hidden>.

Call-ID: wBKF156dkVHsWrGJZopHxKWrq5jcsmEK.

CSeq: 34064 REGISTER.

User-Agent: CSipSimple_supersonic-10/r13.

Contact: <sip:address@hidden:53961;ob>.