Re: [lwip-users] PING problem

[Mário Luzeiro]

I think I had similar issues, the problem was a bug in the DMA libraries used 
by Ethernet driver.

Mario

________________________________________
From: lwip-users <lwip-users-bounces+mrluzeiro=address@hidden> on behalf of ttc 
<address@hidden>
Sent: 24 December 2019 06:16
To: address@hidden
Subject: [lwip-users] PING problem

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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Sent from: http://lwip.100.n7.nabble.com/lwip-users-f3.html

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