I'm trying to trace a received IPv6 packet through the kernel, but I'm having a hard time. I can't find the point at which a packet IP header is examined by the kernel which then says, "You're IPv4; you go this way," or "You're IPv6; you go that way."
netif_receive_skb
I can follow the packet through the device driver until it's handed up to netif_rx() in net/core/dev.c, at which time it gets enqueued and an interrupt is raised, but I can't find the entry point for the packet on the other side of the interrupt. It looks like the packet eventually ends up at ipv6_rcv() in /net/ipv6/ip6_input.c, but I can't find how it gets there, nor what happened after it was enqueued that identified it as an IPv6 packet.
process_backlog netif_receive_skb ipv6_rcv Regards, Mohanlal -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
