[lwip-users] IP frag/reassembly

[Jonathan Larmour]

Is there any reason why it wouldn't be possible to eliminate the MTU sized 
buffer used by ip_frag.c? It seems to me that it would not be hard to 
create a chain of pbufs of type PBUF_REF which have the payload pointing 
directly into the payloads of the pbuf chain being sent. If no-one sees any 
reason why this wouldn't work, I'll put this on my todo list, and I might 
be able to do it in the context of my current project.

Secondly the configurability of ip_frag.c isn't great. I think both MAX_MTU 
and IP_REASS_BUFSIZE are important values which should be settable options 
from lwipopts.h - ip_frag.c takes 7374 bytes of RAM in total, ouch. While 
we're there, there's also less important options such as IP_REASS_MAXAGE 
and IP_REASS_TMO.

It's a simple enough patch for the latter. Do I just send patches here? I 
should have more patches to come in due course.

Jifl
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