[OpenSIPS-Devel] Help needed for working with data lumps

[Roger Schreiter]

Hello

doing a series of tests, I could finally answer
my questions. Here are the answers for the archive,
maybe they'll help someone else later:

Exchange a body content (whole or part of multypart):

> 1. stick an anchor using
>    l = anchor_lump(msg, offset, 0, 0);

Not needed.


> 2. delete the existing body (part) content with
>    del_lump(msg, offset, len, 0);
> 
> 3. insert the new body (part) content with
>    insert_new_lump_after(l, s, len, 0);

Just do step 2 and 3. Use lump, got in step 2, for step 3!
It worked fine for me.


> ISUP-messages may contain 0-bytes. Will insert_new_lump
> use the "len"-parameter and thus maybe also copy zeroes

Yes, 0-byte in the content won't make troubles.


> Will I have to adjust the content length parameter(s)
> (of body and maybe also of part) manually or is it done
> automatically?

Yes, in my tests, the content length parameter was
adjusted automatically.


Roger.