Hello,

In ipip6_rcv() of net/ipv6/sit.c, I am trying to institute "hairpinning".
By that, I mean that when ipip6_rcv() processes an IPv6-in-IPv4
encapsulated packet I examine IPv6 routing to see if the packet should
go back out the same interface it arrived on. If so directed by routing,
I want to rewrite the IPv4 source and destination addresses and directly
call ip_local_output(skb) instead of calling netif_rx(skb). But, when I
call ip_local_output(skb), the system locks up.

Any ideas on what is happening and how to fix it? Or, any ideas on other
ways to do this kind of hairpinning?

Thanks - Fred
fltemplin@gmail.com