Tsuyoshi MOMOSE wrote:
On 2007/02/28, at 20:33, Max Laier wrote:
So, I am contemplating adding to rtsock.c the ability to
send these types of events up. I am thinking on adding
this there for two reasons..
a) SCTP already hooks into the routing socket to get
interface changes.
and
b) It may well be a relevant fact that if an address becomes
DETACHED or non-DETACHED (etc) for a routing process
to want to know about..
What do others think? If I am off in the weeds somewhere and
this does not concern the routing socket I could use other
methods .. including isolating the "look at the state" flags
into a special place so that proper locking could be added
when we actually do locking for the ifa's... of course I would
prefer just not to have to look at it :-D
Opinions if this is a good idea or not??
Great idea. I'm also CC-ing Tsuyoshi MOMOSE who is working on importing
MIP6 which will likely be interested in this information (in userland) as
well. AFAIK, the mnd already listens on the rtsock to pick up new
addresses as soon as possible, but not sooner (for which it has to go
through great lengths).
Thanks for CCed to me.
As Max said, our Mobile IPv6 stack uses rtsock to detect changing
address address such as added, deleted.
(but actually, the program which listens the rtsock is not mnd but
mdd(babymdd). The aim of mdd is just detcting the movement of the node
and notifies to mnd its movement information)
To do that, SHISA introduces a new routing socket message RTM_ADDRINFO
which is sent from kernel when a new address is attached, detached, and
DAD was done. So, you can get an address information soon as possible.
I guess the message meets Randall's requirement for the SCTP.
I don't start the SHISA porting to the head yet, but I can begin the
port first from the RTM_ADDRINFO part if you hope.
Well it might meet some of them.. I need to know when DAD is done, but
also if a interface detaches.. aka stops hearing the RT adverts.. and
then later starts hearing them again..
I was thinking of all the various states V6 addresses go through..
Now, I would love to look at your "patch" if you could send it
to me.. and see if it can be the basis for what I want.
Will you be at the WIDE meeting next week? Or maybe BSD Asia.
If so maybe we could meet up to discuss this :-)
R
----------------------------
Tsuyoshi MOMOSE / ももせつよし
[EMAIL PROTECTED]
http://www.momose.org/ (Underconstruction)
--
Randall Stewart
NSSTG - Cisco Systems Inc.
803-345-0369 <or> 803-317-4952 (cell)
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