Date: 1 Feb 2002 19:24:03 PST From: Preety Puri <preetypuri@usa.net> To: freebsd-net@FreeBSD.ORG Cc: preetypuri@usa.net Subject: Found Possible bugs (IPV6)?? Message-ID: <20020202032403.8675.qmail@cpdvg202.cms.usa.net>
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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 Flg=
s
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 a=
dded
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 displ=
ays
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 l=
ist.
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 =3D splnet();
for (pr =3D nd_prefix.lh_first; pr; pr =3D next) {
struct in6_ifaddr *ia, *ia_next;
next =3D 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'n=
t we
allowed to remove them. Is there some reasoning behind this .. or is it s=
imply
a bug.
Thanks for all the help,
Preety.
"What u see is the virtual perception of u'r digital self"
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