Re: Re: [lwip-users] tcp_sndbuf always returns 0

[WU Rui-Qing]

 The server runs on a platform with TI DSP C6415,uC/OS-II and  LwIP1.3.1,its IP 
is 192.168.2.21.The client runs on host ,its IP is 192.168.2.21.After the 
client connect to the server ,the server send data to the client .the packets 
captured on PC host shows that client sends a duplicated-ACK for SEQ=3894,the 
server retransmits the packet SEQ=3894. I use the default setting in opt.h.
  Thank you very much !

>On Thu, 2009-07-16 at 23:39 +0800, WU Rui-Qing wrote:
>> Hi,
>>
>>    I want to port httpd.c as a high-speed server, it reads data from a
>> FIFO and send data to TCP client. After it works for a moment, it
>> slows down. tcp_sndbuf always returns 0.
>
>Suggests that lwIP is waiting for an ACK for some of its packets from
>the other end.  Could you send a packet capture (e.g. from wireshark) so
>we can see if there's a problem?
>
>Kieran
>
>
>
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　　　　　　　　WU Rui-Qing
address@hidden
　　　　　　　　　　2009-07-17

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