[lwip-users] PING problem

[ttc]

I have the following problem with lwip-2.1.2

I have implemented the socket API so that it can be used, but in rare cases
the connection is broken.
While investigating the cause, I discovered that the PING response was
interrupted on the way.
Attach the image at that time.
<http://lwip.100.n7.nabble.com/file/t2330/ping.jpg> 

When ping became abnormal, we logged with waireshark.
<http://lwip.100.n7.nabble.com/file/t2330/wireshark.jpg> 

If you check the log, you can see that the reply is delayed for the request.
For example, a reply of No. 165 is returned for a request of No. 149.

I think Requests and replies are recorded alternately under normal
conditions, but there are some places where this is not the case.

what I can see to understand the problem?



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