Re: [lwip-devel] Missing initialization somewhere?

[address@hidden]

Sergey Kubushyn wrote:
> The netif is UP and running. If the first packet after reset is ICMP it
> keeps running forever. If the first packet after reset is TCP SYN it
> _sometimes_ (something like every second reset) makes that netif->flags to
> drop its UP flag. If an ICMP packet is in/out (echo req/rply) is processed
> before the first TCP SYN everything work fine every time, no failures.
Hmm, that sounds like some pointer running wild and writing to the 
memory region where netif->flags is?
> > At which point does the netif go down here?
> I don't know yet. ARP goes out OK and received fine. Then when it is time to
> _SEND_ SYN/ACK netif seems to be down.
>
> Reception _STILL WORKS_ , it properly receives the retransmitted SYN,
> generates a proper SYN/ACK and tries to send it back but it fails again in
> ip_route() because netif is presumably down.
That's strange, reception should only succeed if the netif is up (unless 
it's UDP DHCP traffic). For that, netif_is_up() is called in ip_input().

Simon