From owner-freebsd-net  Thu Jan 18 14: 9:48 2001
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Date: Fri, 19 Jan 2001 09:12:29 +1100
From: "Geoffrey Crompton (RMIT Guest)" <ghcrompton@gecko.eric.net.au>
To: freebsd-net@freebsd.org
Subject: kernel to userland communication
Message-ID: <20010119091229.A20358@gecko.eric.net.au>
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  I'm writing an interface to implement something like the DTI interface
from draft-ietf-ngtrans-dstm-03.txt
  As part of that, I need to have a userland daemon (a modified dhcp
client) assign an address to the interface, which is easy using the
ioctl mechanism.
  The tricky bit is finding a way for the interface in the kernel to tell 
the userland dhcp process that it would now like an address to be assigned 
to it. (In the draft the interface waits until it has an IPv4 packet to 
send before it tries to acquire a temporary IPv4 address).

  I _think_ that in the inria stack they use the routing socket, but I
don't understand how they use the routing socket.

  Any ideas?

  Thanks,
  Geoff Crompton


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