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Re: [lwip-users] Lwip client can't connect to another lwip server

From: Jeffrey Wormsley
Subject: Re: [lwip-users] Lwip client can't connect to another lwip server
Date: Fri, 27 Nov 2020 22:25:46 -0500

Very much a rule, look up how ARP works, for instance (example).


On Thu, Nov 26, 2020 at 7:56 AM murat palaci <askermp@hotmail.com> wrote:
Thanks I solved it,
The issue is two boards have same mac address on a common Lan.
i changed one mac number of both and solved
 is it a bug or rule on tcp connection?

Electronic & Software Designer

From: Stephen Cowell <s.cowell@plasmability.com>
Sent: Wednesday, November 25, 2020 9:46:27 PM
To: Mailing list for lwIP users <lwip-users@nongnu.org>; murat palaci <askermp@hotmail.com>
Subject: Re: [lwip-users] Lwip client can't connect to another lwip server
I find that Wireshark points to the problem usually.  If you don't understand the trace, show it here.

On 11/25/2020 11:47 AM, murat palaci wrote:

I have two boards that I developed using STM32F1 with PHY

I used standard tcp_echoclient and tcp_echoserver codes in lwip.

That two boards connect and accept all connections coming from PC via Hercules Software.

So there is no problem on my codes and hardware.

But when I want to connect tcp_echoclient to tcp_echoserver, tcp_echoserver does not accept the request coming from tcp_echoclient.

Client state shows SYN_SENT and
Server state shows nothing

But as I said the client and server can connect to the PC successfully

What can I do in this situation?



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