Re: Kernel 2.2.18: Protocol 0008 is buggy

[Alan Cox]

> The msg comes from net/core/dev.c, and this device is using the Cisco HDLC 
> protocol in drivers/net/hdlc.c . However, AFAIK, 0008 and 0608 represent
> IP and ARP (respectively), not Cisco HDLC. So ...
> 
> What I'd like to know is: what exactly causes this msg?? It seems that
> it's printed when someone sends a packet without properly setting 
> skb->nh.raw first, but who's supposed to set skb->nh.raw?? The HW driver??
> The data link (HDLC) driver?? The kernel protocol drivers? How should I go
> about fixing this problem, where should I start??

It should be set before netif_rx() is called on the packet. Typically that
means the driver or its support code sets protocol and nh.raw and if a
second header is pulled up then they are set again by whichever code does that
and calls netif_rx again