Re: RE : [lwip-users] netconn_connct returning always ERR_OK

[Marko Panger]

Hi Frédéric,

I'm sorry but I really don't know how to determine the version. Is it 
from the CVS head. I'm attaching a snippet from the changelog file:

HISTORY

(CVS HEAD)

 * [Enter new changes just after this line - do not remove this line]

 ++ New features:

 2007-09-15 Frédéric Bernon
 * udp.h, udp.c, sockets.c: Changes for "#20503 IGMP Improvement". Add 
IP_MULTICAST_IF
   option in socket API, and a new field "multicast_ip" in "struct 
udp_pcb" (for
   netconn and raw API users), only if LWIP_IGMP=1. Add getsockopt 
processing for
   IP_MULTICAST_TTL and IP_MULTICAST_IF.

marko

Frédéric BERNON wrote:
> Which lwIP release do you use ?
>
>  
>   
> ====================================
> 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 Marko Panger
> Envoyé : mardi 15 janvier 2008 13:12
> À : Mailing list for lwIP users
> Objet : [lwip-users] netconn_connct returning always ERR_OK
>
>
> Hi all,
>
> I'm writing a client app. which connects to a remote server. I'm running 
> lwip under an rtos with
>
> #define NO_SYS 0
>
> I'm using the netconn sequential api and there is something about the 
> netconn_connect() call which is confusing me.
> If I try to connect to a non-existing server (nobody is listening on 
> that ip on that port) the call still returns with ERR_OK.
>
> Shouldn't be some other error code ?
>
> In general how do I know that the other side has received the data send 
> by the client with netconn_write() ?
>
> Please find attached the code snipped below for reference.
>
> Thanks in advance for your help and comments,
> marko
>
>     IP4_ADDR(&local_ip, 192, 168, 3, 2);
>     IP4_ADDR(&net_mask, 255, 255, 255, 0);
>     IP4_ADDR(&gateway, 192, 168, 3, 1);
>     IP4_ADDR(&server_ip, 192, 168, 3, 1);
>    
>     netif_add(&slip_if, &local_ip, &net_mask, &gateway, NULL, 
> slipif_init, tcpip_input);   
>     netif_set_default(&slip_if);
>     netif_set_up(&slip_if);
>    
>    
>     /* Connect to server */
>     conn = netconn_new_with_proto_and_callback(NETCONN_TCP, 6, 
> server_conn_clb);   
>    
>     while(netconn_connect(conn, &server_ip, RVA_PORT) != ERR_OK)
>         TSK_Sleep(100);
>
>     while(1) {
>         while(!(buf = netconn_recv(conn)))
>             TSK_Sleep(10);
>        
>         netbuf_data(buf, (void*)&p, &len);
>        
>         payload_len = *p++;       
>         /* Ping */
>         switch(*p) {
>             case 6:
>                 netconn_write(conn, p-1, len, true);
>                 netbuf_delete(buf);
>                 break;
>         }
>        
>     }
>
>
>
>
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