pjsip sip header configuration - iphone

Question

I am using Sip in my ios projects and siphon classes on top of pjsip sdk .
I have no problem with basic configuration and therefore I need to add some custom data to my sip header whenever I make a sip call.
I have the following header format
pjsua_core.c . TX 1123 bytes Request msg INVITE/cseq=31730 (tdta0x92aa400) to UDP xxxxx: 5060:
INVITE sip:xxx9#xxxxxx SIP/2.0
Via: SIP/2.0/UDP xxxxx:xxx;rport;branch=z9hG4bKPjt.fUN05fzpwxbm5zJvjoGSA.bnLvoAHl
Max-Forwards: 70
From: sip:xxxx#xxxxx;tag=d1Ww0T4iQNqygphKlqLQ.iNcYx-Cdsb2
To: sip:xxxx#xxxxxxxx
Contact:
Call-ID: a3zCaQtWPsnKrlbyYtLwwhUQgxnLs8hv
CSeq: 31730 INVITE
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS
Supported: replaces, 100rel, timer, norefersub
Session-Expires: 1800
Min-SE: 90
User-Agent: Siphon PjSip v2.0.1svn/arm-apple-darwin9
;sdsd: BLABLABLA
Content-Type: application/sdp
Content-Length: 448
v=0
o=- 3563345387 3563345387 IN IP4 192.168.1.3
s=pjmedia
b=AS:84
t=0 0
a=X-nat:0
m=audio 40000 RTP/AVP 98 97 99 104 3 0 8 96
c=IN IP4 192.168.1.3
b=TIAS:64000
a=rtcp:40001 IN IP4 192.168.1.3
a=sendrecv
a=rtpmap:98 speex/16000
a=rtpmap:97 speex/8000
a=rtpmap:99 speex/32000
a=rtpmap:104 iLBC/8000
a=fmtp:104 mode=30
a=rtpmap:3 GSM/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
--end msg--
I want to change the following two lines
From: sip:xxxx#xxxxx;tag=d1Ww0T4iQNqygphKlqLQ.iNcYx-Cdsb2
To: sip:xxxx#xxxxxxxx
to look like this
From: sip:xxxx#xxxxx;tag=d1Ww0T4iQNqygphKlqLQ.iNcYx-Cdsb2;textid=1 ;texfrom=2;textto=4
To: sip:xxxx#xxxxxxxx
just like that.
Kindly, provide some clarity.

Answer 1

pjsip uses pjsua_call_make_call API to make a call. Inside this it creates a dialog with a call to pjsip_dlg_create_uac. You can pass your custom headers to this API. More information here