upcoming changes

[tridge at samba.org]

First off, happy new year to all the Samba developers out there!

Next, I wanted to let everyone know about a couple of changes I am
about to make to Samba4, as they might be a bit disruptive.

The first change will be the conversion of ldb to use talloc
internally. The new talloc interface has greatly simplified a lot of
the Samba4 code, but as ldb predates the new talloc all our ldb code
is still using the old malloc style, and its really costing us quite a
lot in code complexity. I will be starting on the talloc conversion
today.

I particularly wanted to do the ldb/talloc conversion now as it will
make the addition of NT ACLs on samdb records much easier, which is
essential for proper control of RPC interfaces (such as controlling
who is allowed to join a machine to a domain, change a password
etc). That will integrate nicely with the ACLs and privileges work I
have been doing in the filesystem code.

Next, I will be making some large changes to our rpc server code. Now
that I have added the DSSETUP pipe to Samba4 I am finding that w2k is
attempting to setup multiple interface contexts simultaneously on the
one rpc pipe. It connects to one pipe, then sets up both the LSARPC
interface and the LSADS interface at the same time. This is done by
doing a bind as usual, then using alter_context with no authentication
information to setup a second RPC interface using a different
context_id. Currently we ignore the context_id in our server code, so
we can't support this.

I hope this will be the last large change in our rpc server
infrastructure for a while, but I thought I would warn everyone, as
there may be some disruption as I work out the kinks in the new
multiple-context code.

Cheers, Tridge