> all the settings are default (like #define MEM_SIZE 1048576)
Well, that amount of memory is certainly not a default.
$ grep -R "MEM_SIZE " *
src/include/lwip/opt.h:#define MEM_SIZE 1600
test/unit/lwipopts.h:#define MEM_SIZE 16000
$
lwIP knows nothing about iOS or resource limitations in extensions. lwIP
is a piece of code you tailor to your hardware (physical or virtual).
You known how much memory you have, you set lwIP to use that memory.
You have a port written by someone, you have a network driver written by
someone, you have an application written by someone that uses a certain
lwIP API.
You should make sure that your port is behaving properly, not calling
lwIP basic functions from different contexts.
You should run a known to work application, from the contrib tree, to
make sure the port and driver work OK.
You should then check your app against that contrib tree code and read
the docs, to make sure you are doing things right.
You can post your code to discuss whether you are doing things right,
that helps a lot.
You are getting assertions, that is because some expected condition is
not occurring. You should be able to figure out which one, follow it,
and determine whether your problem comes from.
I would certainly think that your problem is not lwIP related, but you
are using mem_size_t in 32-bits and I don't know if that has been
thoroughly tested. Anyway, chances are your problem is most likely not
in lwIP.
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