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Re: RE [lwip-users] : telnet server
From: |
med_01 |
Subject: |
Re: RE [lwip-users] : telnet server |
Date: |
Thu, 8 Nov 2007 11:22:17 -0800 (PST) |
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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