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Re: [lwip-users] Hello to mailinglist


From: Kieran Mansley
Subject: Re: [lwip-users] Hello to mailinglist
Date: Tue, 17 Feb 2009 11:45:28 +0000

On Fri, 2009-02-13 at 16:41 -0500, Francois Bouchard wrote:
> what is the maximum length (in octets) a single network buffer can
> handle? 

Depends what you mean by a network buffer.  The netbuf API uses a chain
of pbufs to represent a network buffer.  The pbuf chain total length is
held in a u16_t variable, so that will be the upper limit on it.  Each
pbuf in the chain will be approx PBUF_POOL_BUFSIZE long (give or take a
few bytes for alignment) and you can define this in lwipopts.h I think.
The default is "large enough to hold an MTU-sized frame". 

Kieran 





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