Re: [lwip-users] Crash when doing stresstest with ppp and sockets/UDP

[zulu4711]

Thanks for input!
I'm sorry, but I need to take a couple of steps back now (english is not my
native language...)
First of all the initialization sequence.

In my main() I changed now to:

        dial the modem
        starts a thread that will eventually feed serial data to
pppos_input() once everything is up and running.

        sys_sem_new(&init_sem, 0);
        tcpip_init(test_init, &init_sem);
        // we have to wait for initialization to finish 
        sys_sem_wait(&init_sem);
        sys_sem_free(&init_sem);

As the test_init() must run in the main tcpip thread (as it calls the ppp
functions), correct ?

        After this the worker threads are started (that will to
netcon_send/netcon_receive of UDP, and send/recv of socket data)


//--------------------------------------------------------------------
//--------------------------------------------------------------------
static void test_init(void * arg) { /* remove compiler warning */
        const char *username = NULL, *password = NULL;
        sys_sem_t *init_sem;
        username = PPP_USERNAME;
        password = PPP_PASSWORD;

        init_sem = (sys_sem_t*)arg;


        /* init randomizer again (seed per thread) */
        srand((unsigned int)time(0));

        ppp = pppos_create(&ppp_netif, ppp_output_cb, pppLinkStatusCallback, 
NULL);
        if (ppp == NULL) {
                messageDebug(DBG_INFO, __MODULE__, __LINE__, "pppos_create 
error");
        } else {
                ppp_set_auth(ppp, PPPAUTHTYPE_ANY, username, password);
                pppapi_connect(ppp, 1);
        }

        netif_set_default(&ppp_netif);
        netif_set_status_callback(&ppp_netif, status_callback); 
        pppapi_set_notify_phase_callback(ppp, notify_phase_cb);
        netif_set_link_callback(&ppp_netif, link_callback);
        
        sys_sem_signal(init_sem);
}


The thread that is started that takes the SIO data and feeds them to
pppos_input() was something
I did as I understood from Simon that if PPP_INPROC_IRQ_SAFE is 1, that was
safe to do.

Can you explain to me if these assumptions are correct ?

Then I can try and explain afterwards the idea around bringing the line
up/down etc once all is running.




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