Hi ...
I have two issues ... both related to the ndp(IPV6)utility :
1. I am trying to add a temporary entry into the neighbor discovery cache
using ndp. I noticed that it has a temp flag inorder to add temporary
entries(documented in the man page as well).
Here is wot i did :
ndp -s 3ffe::1123 1:2:3:4:5:6 temp
and here is wot ndp -a displayed :
ndp -a
Neighbor Linklayer Address Netif Expire St Flgs
Prbs
3ffe::1234 1:2:3:4:5:6 fxp0 permanent R
so i am trying to add a temporary entry into the cache but it is always added
as a permanant entry ...
Is this a known issue/bug ??
2. The second issue is that the man page for "ndp -p" shows that it displays
all the prefix's in the list (that includes link local).
The man page for "ndp -P" shows that it flushes all the prefix's in the list.
But ndp -P (which is supposed to flush the prefix list) does not
flush the link local address's.
The reason it does'nt flush the entries is as follows :
The ioctl -p SIOCSPFXFLUSH_IN6 in nd6.c (in function nd6_ioctl)explicitly
checks to see if it a link local address and does'nt flush an entry based on
that.
File :nd6.c ; Function : nd6_ioctl ()
(Notice i've pointed the check below using arrows)
case SIOCSPFXFLUSH_IN6:
{
/* flush all the prefix advertised by routers */
struct nd_prefix *pr, *next;
s = splnet();
for (pr = nd_prefix.lh_first; pr; pr = next) {
struct in6_ifaddr *ia, *ia_next;
next = pr->ndpr_next;
-----> if(IN6_IS_ADDR_LINKLOCAL(&pr->ndpr_prefix.sin6_addr)) <----
continue; /* XXX */
so basically ignore any LINK LOCAL prefix's that are in the table.
If we are allowed to have/add link local prefix's in the list , why are'nt we
allowed to remove them. Is there some reasoning behind this .. or is it simply
a bug.
Thanks for all the help,
Preety.
"What u see is the virtual perception of u'r digital self"
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