Re: [ECOS] Fwd: Packet size limit on TCP/IP stack ?

[Jonathan Larmour <jifl at eCosCentric dot com>]

??? wrote:
> Hi, all
>
> I'm making a simple application using "net" option of package.(FreeBSD
> TCP/IP, CVS latest eCos)
>
> But, I found that the  TCP user data which is over 98 bytes cannot be
> sent from or into target board. (target is ARM INTEGRATOR with ARM920T)
>
> When it comes to the Ping test, it also shows that ping packet with
> data size of over 119 bytes cannot be sent.
>
> If the packet size is larger than the size, program contorl is stuck on
> sendto or send.
>
> This happens on both IPv4 and IPv6 stack.
>
> Does eCos TCP/IP stack limit the packet size? or did I missed out some
> option from CDL?

This would be quite a big problem if widespread, which probably makes it 
something specific to your situation.

Run "ecosconfig export foo.ecm" in the same directory as your .ecc to 
generate a foo.ecm file that will show you what options are different from 
the default (although a few of them e.g. for header files get set 
automatically in the net template).

Jifl
--
eCosCentric    http://www.eCosCentric.com/    The eCos and RedBoot experts
--["No sense being pessimistic, it wouldn't work anyway"]-- Opinions==mine


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