[lwip-users] How to force dup ACK

[yueyue papa]

Hi All,

I use lwIP in GPRS environment.  Wireshark is setup in the server.  I
find these information:

lwip  device  <--------------------> server (Wireshark running there)

if  TSS = 512, the TCP stream is working very stable.

if TSS = 1024, 1460, there is always TCP ACK lost in server. The
resend is always happen.

The resend cause the performance down.

Is there a solution I could configure lwIP make duplicate ACK send, so
as to decrease the ACK lost possibility?

thanks
Lee