Hi Group!
Currently I am trying to create an UAC with the following call-flow
UAC Proxy
INVITE--------------->
<--------------100 Trying
<--------------407 Proxy Auth Required
ACK------------------>
INVITE (w.auth)------>
....
The problem is the ACK-request:
<send rtd="true">
<![CDATA[
ACK sip:[EMAIL PROTECTED] SIP/2.0
Via: SIP/2.0/[transport] [local_ip];branch=[branch]
CSeq: 1 ACK
...
!>
</send>
By using the [branch]-field as described in the help, I get as a result
a new branch-parameter "z9hG4bK-1-4", but I _must_ have the same branch
as in the INVITE:
====================RFC3261=======================
17.1.1.3 Construction of the ACK Request
This section specifies the construction of ACK requests sent within
the client transaction. A UAC core that generates an ACK for 2xx
MUST instead follow the rules described in Section 13.
The ACK request constructed by the client transaction MUST contain
values for the Call-ID, From, and Request-URI that are equal to the
values of those header fields in the request passed to the transport
by the client transaction (call this the "original request"). The To
header field in the ACK MUST equal the To header field in the
response being acknowledged, and therefore will usually differ from
the To header field in the original request by the addition of the
tag parameter. The ACK MUST contain a single Via header field, and
this MUST be equal to the top Via header field of the original
request. ...
==================================================
Currently, I am planning to use the regexp to parse this parameter.
Does anyone has a better idea? What about extending the
[last_...]-feature by creating something like:
[last_header_field] or [last_header_index_field], like [last_Via_0_brach]?
Best regards
Michael
--
Michael Hirschbichler, Dipl.-Ing.
Institut fuer Breitbandkommunikation
Technische Universitaet Wien
A-1040 Wien, Favoritenstr. 9-11/388
Tel: +43 1 58801 38846
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