Bill Meier <wmeier@...> writes:
> I think the long description boils down to the following:
>
> Consider the collection of tvbs (chain) as a stack of tvbs.
>
> packet.c pushes the initial tvb onto the stack then calls next
> dissector; After the dissection is complete, the stack is eventually
> free'd via a call to tvb_free_chain in epan_dissect_cleanup.
>
> A dissector:
> - can add new tvbs (real, subset, composite) to the stack handed to it;
> (Subset and Composite tvbs should reference only tvbs which are
> towards the beginning of the same stack).
> - must not save a pointer to a tvb from that stack (handed to it)
> for use when dissecting another frame (since a
> higher level function may very well free the stack);
> - can create its own tvb stack which the dissector is free to manage
> as desired.
Bill, this information, plus the recent post entitled, "buffer to tvb", got me
wondering if there is perhaps enough useful information here worthy of a
separate doc/README.tvbuff?
- Chris