Re: [lwip-users] PPP-new threaded vs non-threaded application

[Sylvain Rochet]

Hello,


On Mon, Apr 07, 2014 at 08:05:33PM +0000, address@hidden wrote:
> Hi Sylvain,
> 
> I think in your post 
> http://lists.nongnu.org/archive/html/lwip-users/2013-06/msg00011.html, 
> you gave some code snippet showing how to use ppp-new in user's 
> application. I believe that snippet is used in a non-threaded 
> application, am I right?

Yes, it is, or inside the tcpip thread with the tcpip_init_done callback 
or tcpip_callback_with_block helper.

By the way, this is a great example for PPPoS I forgot I did, this 
should definitely reach the doc folder :-)


> Can you give an example application code snippet for threaded 
> environment? I have problem to get my threaded application work with 
> PPP-new. Basically, I followed your example for non-threaded 
> environment, but use functions with pre-fix pppapi_ instead of ppp_ as 
> you suggested in that post. The following code snippet is my 
> task(freeRTOS is used) function handling PPP.
> 
> void vPPPApplication(void)
> {
>   ppp_pcb *ppps;
>   char *username = "test";
>   char *password = "test";
> 
>   int connected = 0;
>   int pd;
>   
>   ppps = pppapi_new();

ok

>   /* set the method of authentication. Use PPPAUTHTYPE_PAP, or
>    * PPPAUTHTYPE_CHAP for more security .
>    * If this is not called, the default is PPPAUTHTYPE_NONE. 
>    */
>   pppapi_set_auth(ppps, PPPAUTHTYPE_PAP, username, password);

ok
  
>   pppapi_over_serial_create(ppps, 0, ppp_link_status_cb, NULL);
>   
>   pppapi_open(ppps, 0);

ok

>   while(1) 
>   {
>     u8_t buffer[128];
>     int len;
>     len = sio_read(0, buffer, 20);
>     if(len <= 0) {
>       vTaskDelay( 10 );
>     } else {
>       pppos_input(ppps, buffer, len);
>     }
>   }
> }

ok


Looks good for the case of a direct PPoS session (without a modem) 
between two hosts.

Note that lwIP should be initialized before and it must finish its 
initialisation before calling any of ppp_ or pppapi_ functions.


Sylvain

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