Let me refine my post.
I'm aware it could be that the application is missing some heap, but I need to
prove it instead of just inscrease the memory size, and hope that it was the
solution.
Normal behaviour is to assert if no heap is available. Now sometime it does
that, but not always. Sometime programs stays stuck in mem_malloc() !
it seems that ptr does'nt always scan thru 10240
My memory config is :
#define MEM_SIZE (10*1024)
#define MEM_ALIGNMENT 4
----- Original Message -----
From: Francois Bouchard
To: Mailing list for lwIP users
Sent: Monday, September 28, 2009 11:01 AM
Subject: Re: [lwip-users] Connection closes with Echoraw demo
Hi Bill,
My connection is never idle, i.e. the echo client spits packets like crazy to
the server, then it die, and I need to reconnect.
But, I did'nt test if the connections stays alive when Idle, but I shure will
take a look at what you said;
Thanks for the reply,
Francois
----- Original Message -----
From: Bill Auerbach
To: 'Mailing list for lwIP users'
Sent: Monday, September 28, 2009 10:54 AM
Subject: RE: [lwip-users] Connection closes with Echoraw demo
If the connection is idle, I think you'll need to enable keepalives. I
don't think lwIP is causing this since I have devices with TCP connections open
all day (and they are mostly idle).
Bill
From: [email protected]
[mailto:[email protected]] On Behalf Of
Francois Bouchard
Sent: Monday, September 28, 2009 10:28 AM
To: [email protected]
Subject: [lwip-users] Connection closes with Echoraw demo
HI all,
The server side (embedded) runs the Echoraw demo, which implements a TCP
Echo Server. On the Client Side, my PC an Echo client runs and continuously
sends packest, and measure the Round Trip Time. Client sends Another message
as soon as it receive the echo of the previous one.
That runs fine for a while, but after few time (mostly random I would say,
although it can run for a few hours) the TCP connection terminates by itself !
I think server does'nt have the time to send ACK. Should I pause client
apps once in a while to let the server send acks?
Attached is the wireshark file when the TCP connection stops.
regards,
FB
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