Re: [lwip-users] Assert "tcp_slowtmr" in tcp.c reached

[Marco Jakobs]

I found out some mor additional information which may help to solve my issue: The problem is not always in the tcp.c, after some more testing i've seen that i also get i.e. this assert: /src/core/tcp_in.c, line 208: LWIP_ASSERT("tcp_input: TIME-WAIT pcb->state == TIME-WAIT", pcb->state == TIME_WAIT); This is similar to the other assert, but in an other function. Also i noticed that the problem only seems to occur after my existing PPP link was shut down a minimum of one times. After the PPP shutdown, i got a warning message out of LwIP: Warning: lwIP task returned!!! This is located in /lwip/port/sys_arch.c: void sys_thread_func( void *pvArg ) {   xThreadCtx_t   *pxThreadCtx = pvArg;   /* Call the lwIP thread function. */   pxThreadCtx->pvThreadFunc( pxThreadCtx->pvArg );   vDrvDebugPrint( "Warning: lwIP task returned!!!\r\n" );   /* In case lwIP thread returns kill it. */   SYS_THREAD_HDL_RESET( pxThreadCtx );   /* Kill this task */   vTaskDelete( xTaskGetCurrentTaskHandle(  ) ); } Does anyone have any ideas about this behaviour? Marco Jakobs schrieb: Hi to all, i have noticed that i'm sometimes facing complete (watchdog) restarts of my system. To track this down, i've connected the debug output and managed to get the error ... but then i have no idea how to solve this :-( The systems runs on the assert in line 778 in /src/core/tcp.c:   /* Steps through all of the TIME-WAIT PCBs. */   prev = NULL;      pcb = tcp_tw_pcbs;   while (pcb != NULL) {     LWIP_ASSERT("tcp_slowtmr: TIME-WAIT pcb->state == TIME-WAIT", pcb->state == TIME_WAIT);     pcb_remove = 0;     /* Check if this PCB has stayed long enough in TIME-WAIT */     if ((u32_t)(tcp_ticks - pcb->tmr) > 2 * TCP_MSL / TCP_SLOW_INTERVAL) {       ++pcb_remove;     }

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