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Hi, I am writing a
SIP server that is a B2BUA. I will configure
UAs to point to my server as an outbound proxy. So my server will
receive REGISTERs from UAs, rewrite Via and Contact header-fields and forward
them to the domain SIP Registrar. My B2BUA is not a
registrar, I am doing this so any future incoming INVITEs reach B2BUA instead
of getting to the UAs.
Flow below shows
what I need. Symbol “*” means a rewrite of parts of a SIP message
as it is forwarded: UA
B2BUA(my
app)
REGISTRAR
|
REGISTER ||
| |--------------------------->>||
REGISTER*
| |
||--------------------------->>| |
|| |
|
|| 407 Proxy Auth.Required
| |
||<<---------------------------| | 407
Proxy Auth.Required ||
| |<<---------------------------||
| |
||
| |
REGISTER ||
| |--------------------------->>||
| |
||
REGISTER*
| |
||--------------------------->>| |
||
| |
|| 200
OK | |
||<<---------------------------| |
200 OK ||
| |<<---------------------------||
| |
||
| I am using DUM
for the B2BUA and I wonder if someone has some clues of what and where to do in
reciprocate/my B2BUA to achieve that. Can it be done by
merely subclassing stack/DUM classes or will I need to rewrite stack/DUM
classes ? Thank you all, Julio Cabezas |