Re: [lwip-users] Lwip tcp-stack reliability issue when using non-reliable network?

[Itzik Levi]

Thanks for the reply!

Actually, the end goal is to integrate the solution into rfcomm.

For now, the "physical layer" is being simulated by a single local host tcp connection(under Android OS).

The losses are simulated by simply randomly dropping data in lwip's pppos "output_cb".

I'll attempt to re-enable Nagle, see if there is any changes and report back.

On Tue, Nov 7, 2017 at 4:09 PM, Gisle Vanem <address@hidden> wrote:

Itzik Levi wrote:

I'll go over your lwipopts and see whether I missed something.
In addition, I will attempt to useSO_SNDTIMEO and SO_RCVTIMEO instead of polling in parallel to write and read(I understand by the samples its a more health way of using this api).

If you have anymore suggestions, that will be great!

I think you wrote earlier than you had disabled
"Nagle algorithm". Are you sure that's a good idea?
Maybe you're saturating your RF-link with small fragments.

Just a thought since it's almost never a good idea to
turn off Nagle.

--
--gv

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