Re: [lwip-users] RE: Why the tcp_pcb haven't been free when I calltcp_close()

[geckook Xu]

yes ,when call tcp_close(),they go to FIN_WAIT1,
I reduce the TCP_FIN_WAIT_TIMEOUT and the TCP_MSL values, but my 100
tcp_pcb have been exhausted.
I find it from the mem states.
Can you look into my code and give me some advice.


> > When I call tcp_close(),the program will send FIN,
>
> At which point the connection will (or at least should) move from
> ESTABLISHED to FIN_WAIT1.
>
> > and then the
> > receiver will reply FIN
>
> At which point we'll go through FIN_WAIT2 to TIME_WAIT.
>
> > But the tcp_pcb haven't been free after this operation.
>
> It will have to wait to timeout from TIME_WAIT before it is freed.
>
> However, you said in an earlier post that the connection was still in
> the ESTABLISHED TCP state.  If that is the case I don't know what is
> going on.
>
> Kieran

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