----- Original Message -----
Sent: Monday, September 28, 2009 4:34
PM
Subject: Re: [lwip-users] Connection
closes with Echoraw demo
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 -----
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 -----
Sent: Monday, September 28, 2009
10:54 AM
Subject: RE: [lwip-users] Connection
closes with Echoraw demo
If
the connection is idle, I think youll need to enable keepalives. I
dont think lwIP is causing this since I have devices with TCP connections
open all day (and they are mostly idle).
Bill
From: address@hidden
[mailto:address@hidden On
Behalf Of Francois Bouchard
Sent: Monday, September 28, 2009
10:28 AM
To: address@hidden
Subject:
[lwip-users] Connection closes with Echoraw
demo
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.
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