[sr-dev] Headers for IMS Extensions

[Henning Westerholt]

On Thursday 03 November 2011, Jason Penton wrote:
> For Asserted and preferred identities, we don't need to parse the content,
> but in other headers I have not gotten to yet, we may need to.

Hi Jason,

do you talk about p-asserted and p-preferred header? This are fairly standard 
headers, there are even some PVs to access them right now i think.

> Please help me understand, I would have thought from an architecture
> perspective, we would populate the sip_msg structure with all possible sip
> headers  as well as the parsers. What is the reason we don't do this
> currently? performance?

I'd guess the reasons is memory efficiency. The structure get bigger and 
bigger with every pointer. But for p-asserted and p-preffered, they are 
already included it seems:

        struct hdr_field* pai;
        struct hdr_field* ppi;

Best regards,

Henning