Re: RE [lwip-users] : telnet server

[med_01]

Now is working, thanks!


Frédéric BERNON wrote:
> 
> The tcp_listen call should be change like this:
> 
> ptel_pcb = tcp_listen(ptel_pcb);
> 
> Because the ptel_pcb is freed, and a "listen pcb" is return, and it's not
> the same one. In last CVS head "rawapi.txt" you can read :
> 
> "- struct tcp_pcb *tcp_listen(struct tcp_pcb *pcb)
> 
>   Commands a pcb to start listening for incoming connections. When an
>   incoming connection is accepted, the function specified with the
>   tcp_accept() function will be called. The pcb will have to be bound
>   to a local port with the tcp_bind() function.
> 
>   The tcp_listen() function returns a new connection identifier, and
>   the one passed as an argument to the function will be
>   deallocated. The reason for this behavior is that less memory is
>   needed for a connection that is listening, so tcp_listen() will
>   reclaim the memory needed for the original connection and allocate a
>   new smaller memory block for the listening connection.
> 
>   tcp_listen() may return NULL if no memory was available for the
>   listening connection. If so, the memory associated with the pcb
>   passed as an argument to tcp_listen() will not be deallocated."
>   
> ====================================
> Frédéric BERNON 
> HYMATOM SA 
> Chef de projet informatique 
> Microsoft Certified Professional 
> Tél. : +33 (0)4-67-87-61-10 
> Fax. : +33 (0)4-67-70-85-44 
> Email : address@hidden 
> Web Site : http://www.hymatom.fr 
> ====================================
> P Avant d'imprimer, penser à l'environnement
>  
> 
> 
> -----Message d'origine-----
> De : address@hidden
> [mailto:address@hidden De la
> part de wll
> Envoyé : jeudi 8 novembre 2007 19:32
> À : Lwip Users
> Objet : [lwip-users] telnet server
> 
> 
> Hi all,
>  
>  I'm using the lwip-1.1.1 with raw api, and I want to
>  make a telnet server. My init function is:
> 
> void Telnet_init(void)
> {
>  struct tcp_pcb *ptel_pcb;
>  
>  //new pcb
>  ptel_pcb = tcp_new();
> 
>  //Bind it to port 23
>  tcp_bind(ptel_pcb, NULL, 23);
> 
>  //state to pcb LISTEN
>  tcp_listen(ptel_pcb);
> 
>  //register the callback
>  tcp_accept(ptel_pcb, Telnet_accept);
> }
> 
> But the code in the callback Telnet_accept never run.
> Looking in the stack I saw that the function
> tcp_input() call to tcp_listen_input(), but the
> last one do esn't call to tcp_process().
> 
> Can someone wive me an advice, regards
> Med
> 
> 
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