Re: ipip6_tunnel_xmit

Hi, I'm trying to understand the sit driver code net/ipv6/sit.c (2.6.35.12). I'm trying to forward incoming packet from another interface (eth0) to ISATAP tunnel interface (is0) by calling dev_queue_xmit (dev) with dev set to is0. Eventually ipip6_tunnel_xmit routine is getting called, skb_dst()->neighbor is returning null. (I think this is returning null since the dest ip(v6) is incorrectly set). I would like to know what should be the header fields that needs to be set when passing down to tunnel, in order to forward it to isatap router. Please let me know