[Serusers] How to add fields in INVITE SDP ?

[Jiri Kuthan]

ser has been designed for use as a proxy server, i.e. a device
which is ignorant of payloads. That's a feature, not a bug.
Adding a support to change SDP should be easy, though.

You would need to find the body (I think the SMS gateway 
uses some function to distill the body -- Bogdan would give
you a hint) and modify it. actions in textops module are 
best examples how to change message. 'replace' changes
parts of a message matching a regular expression, 
append_hf appends a header field. Remember that when
you change SDP, you need to change Content-length too.


-Jiri

At 04:06 PM 1/10/2003, David.Rio at alcatel.fr wrote:
>Hello
>
>I am using SER in a test environment as a proxy server.
>I would like it to add additional fields in the SDP of an INVITE message for some
>test needs. (e.g. add 'a=sendonly').
>
>Is it possible ?
>
>If not possible, do you think it would be difficult to add a function
>addSdp(<string>) that would append a given string to the SDP of the
>current message and alter the 'content_length' header field ?
>
>I do not see in the 'sip_msg' structure any pointer to the body part of the
>message ; only pointers to header fields.
>
>Thanks for you help
>
>-- 
>David Rio
>Alcatel CIT - Rennes
>ASD France
>33 2 99 87 47 18
>
>
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--
Jiri Kuthan            http://iptel.org/~jiri/