Re: route(4): Adding ROUTE_MSGFILTER socket option

[Robert Elz <kre%munnari.OZ.AU@localhost>]

    Date:        Wed,  5 Apr 2017 12:39:04 +0100 (BST)
    From:        Robert Swindells <rjs%fdy2.co.uk@localhost>
    Message-ID:  <20170405113904.1820030285C%ren.fdy2.co.uk@localhost>

  | I have got the Kame Mobile IP code in my tree, what kind of mechanism
  | do you think needs to be added to better support it ?

It could filter the mobility messages, so those destined to a mdd type
process are received only there, and those for mnd just there (etc), most
of the mobility messages are intended for just one of the daemons.

  | The Mobile IP userland could make use of this patch to reduce the amount
  | of times that it is woken up by routing socket changes other than
  | RTM_CHGADDR.

Yes, that too.

kre