Re: [lwip-users] Is something wrong in netconn_accetp() api ??

[Jonathan Larmour]

yihect wrote:
>  
>   When I sent a http request using TELNET program in my pc, the 
> netconn_accept() returned, and I had noticed SYN/SYN+ACK/ACK packages in 
> Ethereal, I think that meas the TCP connection(accept_conn) have 
> established.
>   But when I stepped into netconn_recv() in http_server_serve() fun, I 
> found the conn->state is equal to zero, namely NETCONN_NONE.

That is correct.

> Finally, 
> netconn_recv() return a null pointer, and the port is crashed.

Is that just after you closed your telnet? If so, then I don't believe 
there's any problem. The example program is not robust to that - it's only 
a trivial example for demonstration purposes. It doesn't check the return 
from netconn_recv.

>   Here, Is something wrong? Since the connection had been established , 
> should state field of the connection be NETCONN_CONNECT , not be 
> NETCONN_NONE ? From Ethereal's output, the connection have closed, which 
> proved by debugging into following if-block in netconn_recv() fun:

NETCONN_CONNECT is only used if something is waiting for a 
netconn_connect() to complete.

Jifl
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