[lwip-users] Assertion - tcp_receieve: valid queue length

[Prateek Jain]

Hello,

 

  I am getting the following assertions.

 

1.

        if (pcb->snd_queuelen != 0) {
          LWIP_ASSERT("tcp_receive: valid queue length", pcb->unacked != NULL ||
                      pcb->unsent != NULL);
        }
 

2.  

 if (queuelen != 0) {
    LWIP_ASSERT("tcp_enqueue: pbufs on queue => at least one queue non-empty",
      pcb->unacked != NULL || pcb->unsent != NULL);
  }

 

I couldn't figure out the reason till now.

 

Based on previous mails on the same topic, I will give some information about my application.

 

I am writing ftp client which will use PPP. This application will run on ARM with uCos OS. 

Iam running three LWIP threads. LWIP version is lwip-1.1.0

 

1. My FTP CLient App

2. PPP thread.

3. TCPIP Thread.

 

I have used tcpip_input in netif_add as follows:

 

  if (netif_add(&pc->netif, &pc->addrs.our_ipaddr, &pc->addrs.netmask, &pc->addrs.his_ipaddr, (void *)pd, pppifNetifInit, tcpip_input)) {

 

Iam using tcp_write API to send the data. This API is called from FTP CLient App context.

 

I have to send a lot of data ( 150 files of size 20 KB). For every file I open a new connection (tcp_connect) and close it once data goes(tcp_close). This is the way FTP server expects(opening and closing new data conn) -PASV mode

 

Any inputs will be highly appreciated.

 

Thanks

Prateek