[lwip-devel] [task #7017] Implement DNS client

[Simon Goldschmidt]

Follow-up Comment #69, task #7017 (project lwip):

> As long the linker can drop the code if the application doesn't use it,
it's not a problem to add it.

I rather was concerned about adding code that noone needs/maintains...

re comment #64:

Do you mean to add more err_t values and include them in err_to_errno_table?
I think that would be a good thing to do, but we'd have to talk about the
return value of dns_gethostbyname: it would be ERR_OK when the result was
cached, I guess (ERR_MEM/ERR_VAL/ERR_ARG is straightforward, also). But what
would it be for an enqueued request? I think it should be ERR_OK also, since
this is OK, but then we can't distinguish it from the other ERR_OK... any
thoughts?

re comment #65:

Honestly, I also read that (h_errno instead of errno), but since we don't
have a h_errno, I just modified errno... Not really portable, but who cares
for an exact error message ;-)

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