Hi,
I'm trying to understand the IPv6 proxy setup &
handling.
What I understood from the ndisc_rcv code is that once
a proxy is set up (pneigh table entry), IPv6 would
reply only to Address resolution Neighbor Solicitation
message for this addres, but will not defend DAD....
the snippet of ndisc_rcv is something like this:
case NDISC_NEIGHBOUR_SOLICITATION:
....
if ((ifp = ipv6_get_ifaddr(&msg->target, dev)) !=
NULL){
.....
} else
{
if (in6_dev && in6_dev->cnf.forwarding &&
(addr_type & IPV6_ADDR_UNICAST) &&
pneigh_lookup(&nd_tbl, &msg->target, dev, 0))
{
....
}
if(in6_dev)
in6_dev_put(in6_dev);
return 0;
.......
What i'm not able to understand is why proxy would
reply to NS from unicast address only & not respond to
NS from unspecified address (which would be the case
of somebody doing DAD for the address in proxy table)?
It will be very helpful if i can understand the logic
behind this.
thanks,
suvidh
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