Re: [lwip-devel] [bug #50040] pbuf_alloc(..., 65534, PBUF_RAM) succedes

[address@hidden]

David van Moolenbroek wrote:
> Follow-up Comment #2, bug #50040 (project lwip):
>
> [..]
> [Off-topic: that udp case does worry me: even if allocation doesn't get
> truncated, it will hit the assertion I mentioned, but lwIP doesn't seem to
> have a clear model for "use PBUF_POOL for allocation if we are using pools, or
> PBUF_RAM otherwise" so I am not sure what should be done there. There are
> probably other cases like that, and this does worry me quite a bit..]

Up to now, PBUF_POOL is actually meant for RX from a netif. All other 
cases use PBUF_RAM for allocation.

This is to be improved (see the unfortunately rather old buf #3031).
The idea is to convert 'pbuf_type' to a bit field e.g. indicating tx/rx, 
contiguous buffer requested, etc.
and then letting the code behind (or even the application) decide which 
memory type or which pool is used...

Simon