Re: [lwip-users] Is this duplicate data

[yueyue papa]

>>I expect 117.136.5.196/198 are the lwIP clients and 222.68.155.155 is the (non-lwIP) server? (Please provide such informations when sending a pcap trace!)
Yes.  Sorry, I missed to provide this informaiton.

117.136.6.196/198 are running in the small devie in the GPRS environment, and I could not create the pcap trace log.

So your conclusion is:  It is the server send 2 times reponse not lwIP receiving problem.

Thanks.

On Wed, Jan 11, 2012 at 6:35 PM, Simon Goldschmidt <address@hidden> wrote:

yueyue papa <address@hidden> wrote:
> lwIP IP 1.4.0 is used.  I meet a duplicate data problem in two way TCP
> communication.  The communication is in the GPRS network.
>
> Client is running lwIP.
>
> C--> S
> C<-- S    inform 1
> C--> S
> C<---S    inform 2
>
> In the normal,  client should get inform 1, 2.
>
> But in certain case:  client get 1, 1, 2

I expect 117.136.5.196/198 are the lwIP clients and 222.68.155.155 is the (non-lwIP) server? (Please provide such informations when sending a pcap trace!)

In that case, there's nothing wrong with lwIP but the server simply sends 2 responses. The packet trace shows no sequence errors in that region.

Simon
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