[lwip-users] RE: LWIP TCP issues

[Ashish Anand]

@Hari: I'm facing similar problems on eCos - Lwip - PPP - TCP.
If you could follow this thread:

http://lists.gnu.org/archive/html/lwip-users/2007-02/msg00044.html

and probably get back to me regarding the same.

Regards,
Ashish Anand
Research Intern - Dept. of Electrical Engineering
Indian Institute of Technology, Delhi
http://dudafunk.myvnc.com



Hari-10 wrote:
> 
> Thanks Kieran..Would look in to it
> 
> -----Original Message-----
> From: address@hidden
> [mailto:address@hidden On Behalf Of
> Kieran Mansley
> Sent: Friday, September 15, 2006 2:11 PM
> To: Mailing list for lwIP users
> Subject: RE: [lwip-users] LWIP TCP issues
> 
> On Fri, 2006-09-15 at 09:02 +0100, Kieran Mansley wrote:
>> > > 
>> > >      We are using LWIP in an ecos based environment. We are having
>> > > problems with LWIP TCP. The udp part is communicating successfully to
>> > > a external TCP/IP stack from our system. But while using TCP client
>> to
>> > > connect to a external TCP server from with in the system, it is not
>> > > working. The tcp_connect results in a SYNC to the external server.
>> The
>> > > server acks with a SYNC -ACK. Then a RST goes from the LWIP instead
>> of
>> > > an ACK to complete the initialization handshake.
>> 
>> Hmm, that is strange. 
> 
> Something else I've just noticed.  You're sending ethernet frames that
> are less that 60 bytes long on the wire, which I think is invalid - take
> a look at packets 27 and 28: seemingly identical ARP replies, but one is
> 48 bytes, the other is 60 bytes.  I wonder, could you have two devices
> configured with the same MAC address on you network?  That could explain
> the problems.
> 
> Kieran
> 
> 
> 
> 
> 
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