Re: [lwip-users] Connection-Abort error while netconn_connect in lwip+freertos on Atmel-Studio-7

[Ajay Garg]

Hi Simon.

Thanks for the reply.

The IP-Address and Port are very well in existence; we have thousands
of (other kinds of) devices already connected to our server. (Just for
the record, our server is a MQTT-broker server. Currently I am trying
to connect our device to port 1883 on the server. 1883 is an unsecured
port,  so no SSL-related issues).

The device we are using is a SOC, using ATSAM4E8CA-AUR controller,
with KSZ8051MNL ethernet-module.
What is the best/recommended way to take a wireshark-dump in this case
(I am sorry, I have only taken wireshark-dump on OS-based systems with
full-fledged shell. Currently, no experience in taking wireshark-dumps
on an embedded-SOC).


Thanks and Regards,
Ajay

On Mon, Sep 25, 2017 at 11:11 PM, address@hidden <address@hidden> wrote:
> Ajay Garg wrote:
>>
>> We are using lwip-1.4.1 with FreeRTOS on Atmel-Studio-7, on Windows.
>>
>> During the call to netconn_connect, the resultant err_t code being
>> returned is ERR_ABRT.
>> [..]
>> I have googled, and I see a lot of people have this issue.
>
>
> Great. This means the remote host did not respond to your connect request.
> I'm not suprised others see this as well :-)
>
>> Unfortunately/Surprisingly, I was unable to land on a concrete solution :(
>
>
> One possible solution would be to get the remote host responding ;-)
>
> Or more seriously: you might have a problem with transmitting or receiving
> tcp segments. I assume your lwip port or something else is new and untested.
> Wireshark is your friend in that case ;-)
> However, it could be also just be a non-existing IP address...
>
> Simon
>
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-- 
Regards,
Ajay