Hi,
I am facing a strange issue with lwip 1.3.0. The issue is also seen when I
upgrade to lwip 1.3.2.
I have written a small application for txiperf that runs as an application on
the lwip stack (it is in standalone mode with no OS being used). On the other
end I have a PC which runs jperf. Below is part of my application code:
#define SEND_BUFSIZE (1400)
static char send_buf[SEND_BUFSIZE];
inttransfer_txperf_data() {
intcopy = 0;
err_terr;
structtcp_pcb *tpcb = connected_pcb;
if(!connected_pcb)
returnERR_OK;
while(tcp_sndbuf(tpcb) > SEND_BUFSIZE) {
err = tcp_write(tpcb, send_buf, SEND_BUFSIZE, copy);
if(err != ERR_OK) {
xil_printf("txperf: Error on tcp_write: %d\n\r", err);
connected_pcb = NULL;
return-1; }
tcp_output(tpcb); }
return0;
}
The exact issue that I face is, after running for few hours, the transmission
stops from my end. And the reason that I see is, tcp_sndbuf (tpcb) becomes less
than 1400 (which should not have happened).
If I run wireshark on the PC where jperf runs, the capture indicates an "TCP
out
of order" message. Probably, the PC asks for a re-transfer but the board does
not respond.
Any fix for it?
regards
Anirudha_______________________________________________
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