[ECOS] IP stacks for eCos

[ECOS] IP stacks for eCos

[Tom Malcolmson]

I'd like to switch from Nucleus to eCos, but I have some questions about 
IP stacks.

Somewhere it says that the eCos IP stack supports: IPv6, DHCP, SNMP 
agent, HTTPD, TFTP.  Well, that sounds great, but there appear to be 2 
IP stacks for eCos: FreeBSD port and the OpenBSD port.  Do they both 
support these features?  Are both in 'good shape'?

I desire the listed features, but I need to keep things small (my system 
is 1MB flash and 4MB RAM).  Which of the two stacks are smaller?

I see that people are also using the uIP and the lwIP stacks with eCos.  
Those are much smaller but they appear very minimal in their features.  

Searching thru this mailing list I found a memory comparison that I've 
pasted below.  It's a little scary to see how much space the FreeBSD 
stack takes.

Thanks for any suggestions,
Tom.

*  bare eCos:
$ arm-elf-size twothreads
  text    data     bss     dec     hex filename
 45992     800   25784   72576   11b80 twothreads

*  eCos with NET LWIP :
  text    data     bss     dec     hex filename
 48956    1504   26372   76832   12c20 twothreads

*  eCos with NET FreeBSD :
  text    data     bss     dec     hex filename
213712    3592  322176  539480   83b58 twothreads    


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Re: [ECOS] IP stacks for eCos

[Andrew Lunn]

On Thu, Sep 21, 2006 at 04:11:06PM -0400, Tom Malcolmson wrote:
> I'd like to switch from Nucleus to eCos, but I have some questions about 
> IP stacks.
> 
> Somewhere it says that the eCos IP stack supports: IPv6, DHCP, SNMP 
> agent, HTTPD, TFTP.  Well, that sounds great, but there appear to be 2 
> IP stacks for eCos: FreeBSD port and the OpenBSD port.  Do they both 
> support these features?  Are both in 'good shape'?

IPv6 is only supported in the FreeBSD stack. The OpenBSD stack has
been depreciated. It should still work, but most people now use
FreeBSD.

        Andrew

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