Hello,
I am experimenting with adding support for SIP 302 to redirect an inbound call
when the PBX is configured to forward the call.
The ITSP requires that the Contact header include the number where the call
should be redirected, and a Diversion header must be added that identifies the
valid SIP trunk DID associated with the call.
I tried sending this response to the incoming INVITE:
nua_respond(handle, 302, "Moved Temporarily",
SIPTAG_CONTACT_STR("sip:9725551...@itsp.com:5060"),
SIPTAG_HEADER_STR("Diversion: <sip:9725559...@itsp.com>"),
TAG_END());
Sofia-SIP generates this outgoing response:
SIP/2.0 302 Moved Temporarily
Via: SIP/2.0/UDP nnn.nnn.nnn.nnn:5060;branch=z9hG4bK39lurp00dgvh0e0fg2s0.1
From: "Out of Area"
<sip:9725553...@itsp.com;user=phone>;tag=437990541-1274304841447-
To: "parentAccountFN parentAccountLN"
<sip:9725559...@itsp.com>;tag=ay1e7NH4a9pDH
Call-ID: bw1734014471905101951145...@itsp.com
CSeq: 423519092 INVITE
Contact: <sip:9725551...@itsp.com:5060>
Accept: application/sdp
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, NOTIFY,
REFER, UPDATE, REGISTER
Supported: timer, 100rel
Content-Length: 0
Diversion: <sip:9725559...@itsp.com>
The problem is that the Diversion header created using SIPTAG_HEADER_STR()
appears *after* the Content-Length header.
I see this post from Oct 2006:
http://www.mail-archive.com/sofia-sip-devel@lists.sourceforge.net/msg00928.html
I would think Sofia-SIP would process SIPTAG_HEADER_STR() by locating the
custom header *before* the Content-Length header.
I am using Sofia-SIP 1.12.10 (thank you for the open source contribution).
How can I parameterize or otherwise code a custom header such that it appears
before the Content-Length header?
Thanks.
Jim
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