|
Dear sir /madam
I have some queries regarding IPv6. I am still in
the learning stage. So, my question may look very simple for you, but if you
answer it, that will help me a lot. Please answer the following
questions.
1. the route table entry consists
of "Destination , Next Hop,
Flags, Metric, Ref, Use,
Iface".
If i recieve an IPv6 packet the function ip6_rcv
I would like to know to what are the functions
the function pointers input and output in the struct dst_entry
structure(Destination)?.
The function ip6_input processes the Ipv6
packet and calls the upper layer functions.
The fucntion ip6_input is called twice
1) when a multi cast packet is recieved to deliver
a packet to host, and
2) rt->u.dst.input = ip6_input;
it is mapped while adding the address [int
ip6_rt_addr_add(struct in6_addr *addr, struct device *dev)]
The address add routine[ip6_rt_addr_add] above is
called when a new address is to be added when the flag is RTM_NEWADDR , and
called by the function
static void sit_add_v4_addrs(struct inet6_dev
*idev).
But when an Ipv6 address is added to a host, the
function ip6_input is not mapped to dst->input, in which case the host cannot
recive the packet with that IPv6 address?
Thanks and Regards
Abdul Khaliq
|