[Bug 1712] Add LWIP Support to RTEMS

[bugzilla-daemon at rtems.org]

https://www.rtems.org/bugzilla/show_bug.cgi?id=1712

--- Comment #1 from Joel Sherrill <joel.sherrill at oarcorp.com> 2010-10-28 11:22:31 CDT ---
I wanted to follow up the initial description and patch zip with some
information.  LWIP is a low memory TCP/IP implementation.  It is the standard
implementation used in smaller embedded systems and is shipped with a few
closed and open source RTOSes.  When you look at embedded targets as covering a
wide spectrum of embedded hardware, we see even 32-bit ARM and Coldfire systems
with 256K Flash and 64K RAM.  That is the large end of what LWIP is designed
for.  Above that in memory/CPU, our BSD stack is the solution.  

LWIP is also designed to operate in 8 and 16 bit environments.  This is an area
the BSD stack was not designed to address.

In general terms, below a certain point in memory/CPU, the BSD stack is not
technically appropriate.  LWIP is the standard solution for those environments.

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