Hi,
I want to extract the IP address in the
received parameter of the top most via header of a response
and use that in a custom header while sending response back to
the caller. Can somebody please tell how to implement that in
the Kamailio configuration file?
I need to handle a NAT traversal scenario
without enabling NAT in Kamailio which is used as the proxy
server. The caller which is in the same network as Kamailio
first sends a OPTIONS request to the callee before sending the
INVITE. It uses the public IP address returned in the custom
header of the OPTIONS response to build the contact header and
SDP of the INVITE request. In fact, it first looks for the IP
address in the received parameter of the via header to do
that. But Kamailio removes the top most via with received
parameter and then sends the OPTIONS response back to the
caller. So we are using a custom header for that purpose.
I would appreciate other suggestions to
achieve this in Kamailio, may be by enabling NAT or some other
alternative.
Thanks,
Ajay