[support] Dynamic MNP's for MR?

[Mattias Blomqvist]

Hi Arnaud,

Thanks for your reply.

On Mon, Sep 28, 2009 at 12:54 PM, Arnaud Ebalard <arno at natisbad.org> wrote:
> Hi Mattias,
>
> Sorry for the long delay. I was busy.
>
> Mattias Blomqvist <mattias.blomqvist at gmail.com> writes:
>>
>> I took this route and it was quite easy to get it to work for adding
>> MNPs to existing HoA's. This works and the new MNP is reachable from a
>> CN.
>> What I do is basically adding (or deleting) the MNP to the MNP list
>> for an existing HoA record and then trigger a movement by a call to
>> mn_movement_event(). This results in a new BU which the HA accepts.
>> So far so good.
>> What I've discovered is that although the network of the newly added
>> MNP is reachable from a CN and the other way around, the network of
>> the newly added MNP is not reachable (pingable) from the MR itself.
>> This seems to be due to missing routes in at least the RT6_TABLE_MIP6
>> (252), maybe also in the main table. I've tried adding a call to
>> nemo_mr_tnl_routes_add() after adding the new MNP but before
>> triggering the BU. This does not seem to help.
>>
>> What I'm looking for is some pointers in how to get the routes in
>> place using the already available infrastructure.
>
> In mn_init(), the following:
>
>        list_for_each(l, &conf.home_addrs) {
>                struct home_addr_info *hai;
>                hai = list_entry(l, struct home_addr_info, list);
>                if (conf_home_addr_info(hai) < 0)
>                        goto err_hoa;
>        }
>
> installs the rules on the MR, via calls to nemo_mr_rules_add. You could
> probably create a small helper (nemo_mr_rule_add()/nemo_mr_rule_del()
> to handle addition/removal of one rule) and then calling it when
> adding/removing a MNP dynamically

I saw that construct. However, I thought a call to conf_home_addr_info
with an existing hai would cause trouble. But maybe that wasn't what
you meant.

Anyway, I solved the problem. The trick was to add (or delete) two
rules and and one route when adding (or deleting) a new MNP for an
existing HoA.

BR,
Mattias Blomqvist