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management system I proposed on samba-technical a couple of days
ago. Essentially it is a very lightweight way for any code in Samba to
make IDL based rpc calls to anywhere else in the code, without the
client or server having to go to the trouble of setting up a full rpc
service.
It can be used with any of our existing IDL, but I expect it will
mostly be used for a new set of Samba specific management calls.
The LOCAL-IRPC torture test demonstrates how it can be used by calling
the echo_AddOne() call over this transport.
interestingly, w2k3 seems to have 4 different varients of the netlogon
cldap response. We decode two of them so far. The other two are tricky
as they aren't distinguished by a command code, they use the same
command codes (0x13 and 0x17) but have quite a different format. Very
strange!
suite. The NBT-DGRAM test does a UDP/138 netlogon request, to which a
windows server sends a reply, but the windows server sends the reply
to the wrong port (it always sends to 138), so the test suite doesn't
see it.
GENSEC, and to pull SCHANNEL into GENSEC, by making it less 'special'.
GENSEC now no longer has it's own handling of 'set username' etc,
instead it uses cli_credentials calls.
In order to link the credentails code right though Samba, a lot of
interfaces have changed to remove 'username, domain, password'
arguments, and these have been replaced with a single 'struct
cli_credentials'.
In the session setup code, a new parameter 'workgroup' contains the
client/server current workgroup, which seems unrelated to the
authentication exchange (it was being filled in from the auth info).
This allows in particular kerberos to only call back for passwords
when it actually needs to perform the kinit.
The kerberos code has been modified not to use the SPNEGO provided
'principal name' (in the mechListMIC), but to instead use the name the
host was connected to as. This better matches Microsoft behaviour,
is more secure and allows better use of standard kerberos functions.
To achieve this, I made changes to our socket code so that the
hostname (before name resolution) is now recorded on the socket.
In schannel, most of the code from librpc/rpc/dcerpc_schannel.c is now
in libcli/auth/schannel.c, and it looks much more like a standard
GENSEC module. The actual sign/seal code moved to
libcli/auth/schannel_sign.c in a previous commit.
The schannel credentails structure is now merged with the rest of the
credentails, as many of the values (username, workstation, domain)
where already present there. This makes handling this in a generic
manner much easier, as there is no longer a custom entry-point.
The auth_domain module continues to be developed, but is now just as
functional as auth_winbind. The changes here are consequential to the
schannel changes.
The only removed function at this point is the RPC-LOGIN test
(simulating the load of a WinXP login), which needs much more work to
clean it up (it contains copies of too much code from all over the
torture suite, and I havn't been able to penetrate its 'structure').
Andrew Bartlett
The main volume of this patch was what I started working on today:
- Cleans up memory handling around DCE/RPC pipes, to have a parent talloc context.
- Uses sepereate inner loops for some of the DCE/RPC tests
The other and more important part of this patch fixes issues
surrounding the new credentials framwork:
This makes the struct cli_credentials always a talloc() structure,
rather than on the stack. Parts of the cli_credentials code already
assumed this.
There were other issues, particularly in the DCERPC over SMB handling,
as well as little things that had to be tidied up before test_w2k3.sh
would start to pass.
Andrew Bartlett
puts support for it into popt_common, adds a few utility functions
(in lib/credentials.c) and the callback functions for the command-line
(lib/cmdline/credentials.c). Comments are welcome :-)
I wanted to add a simple 'workstation' argument to the DCERPC
authenticated binding calls, but this patch kind of grew from there.
With SCHANNEL, the 'workstation' name (the netbios name of the client)
matters, as this is what ties the session between the NETLOGON ops and
the SCHANNEL bind. This changes a lot of files, and these will again
be changed when jelmer does the credentials work.
I also correct some schannel IDL to distinguish between workstation
names and account names. The distinction matters for domain trust
accounts.
Issues in handling this (issues with lifetime of talloc pointers)
caused me to change the 'creds_CredentialsState' and 'struct
dcerpc_binding' pointers to always be talloc()ed pointers.
In the schannel DB, we now store both the domain and computername, and
query on both. This should ensure we fault correctly when the domain
is specified incorrectly in the SCHANNEL bind.
In the RPC-SCHANNEL test, I finally fixed a bug that vl pointed out,
where the comment claimed we re-used a connection, but in fact we made
a new connection.
This was achived by breaking apart some of the
dcerpc_secondary_connection() logic.
The addition of workstation handling was also propogated to NTLMSSP
and GENSEC, for completeness.
The RPC-SAMSYNC test has been cleaned up a little, using a loop over
usernames/passwords rather than manually expanded tests. This will be
expanded further (the code in #if 0 in this patch) to use a newly
created user account for testing.
In making this test pass test_rpc.sh, I found a bug in the RPC-ECHO
server, caused by the removal of [ref] and the assoicated pointer from
the IDL. This has been re-added, until the underlying pidl issues are
solved.
DCOM paper in lorikeet. This is the result of 1.5 months work (mainly
figuring out how things *really* work) at the end of 2004.
In general:
- Clearer distinction between COM and DCOM. DCOM is now merely
the glue between DCE/RPC+ORPC and COM. COM can also work without
DCOM now. This makes the code a lot clearer.
- Clearer distinction between NDR and DCOM. Before, NDR had a couple of
"if"s to cope with DCOM, which are now gone.
- Use "real" arguments rather then structures for function arguments in
COM, mainly because most of these calls are local so packing/unpacking
data for every call is too much overhead (both speed- and code-wise)
- Support several mechanisms to load class objects:
- from memory (e.g. part of the current executable, registered at start-up)
- from shared object files
- remotely
- Most things are now also named COM rather then DCOM because that's what it
really is. After an object is created, it no longer matters whether it
was created locally or remotely.
There is a very simple example class that contains
both a class factory and a class that implements the IStream interface.
It can be tested (locally only, remotely is broken at the moment)
by running the COM-SIMPLE smbtorture test.
Still to-do:
- Autogenerate parts of the class implementation code (using the coclass definitions in IDL)
- Test server-side
- Implement some of the common classes, add definitions for common interfaces.
- Disable all current DCOM functionality (I hope to commit
a large bunch of COM and DCOM changes later today)
- Make remact and oxidresolver depend on orpc rather then dcom
less likely that anyone will use pstring for new code
- got rid of winbind_client.h from includes.h. This one triggered a
huge change, as winbind_client.h was including system/filesys.h and
defining the old uint32 and uint16 types, as well as its own
pstring and fstring.
- change the iface_n_*() functions to return a "const char *" instead of a "struct ipv4_addr"
I think that in general we should move towards "const char *" for
all IP addresses, as this makes IPv6 much easier, and is also easier
to debug. Andrew, when you get a chance, could you fix some of the
auth code to use strings for IPs ?
- return a NTSTATUS error on bad name queries and node status instead
of using rcode. This makes the calling code simpler.
- added low level name release code in libcli/nbt/
- use a real IP in the register and wins nbt torture tests, as w2k3
WINS server silently rejects some operations that don't come from the
IP being used (eg. it says "yes" to a release, but does not in fact
release the name)
NBT-REGISTER test that tests that a server correctly defends its name
against broadcast name registrations.
Jeremy, you might like to look at this. Samba3 nmbd fails to respond.
which will eventually try all resolution methods setup in smb.conf
- only resolution backend at the moment is bcast, which does a
parallel broadcast to all configured network interfaces, and takes
the first reply that comes in (this nicely demonstrates how to do
parallel requests using the async APIs)
- converted all the existing code to use the new resolve_name() api
- removed all the old nmb code (yay!)
I decided to incorporate the udp support into the socket_ipv4.c
backend (and later in socket_ipv6.c) rather than doing a separate
backend, as so much of the code is shareable. Basically this adds a
socket_sendto() and a socket_recvfrom() call and not much all.
For udp servers, I decided to keep the call as socket_listen(), even
though dgram servers don't actually call listen(). This keeps the API
consistent.
I also added a simple local sockets testsuite in smbtorture,
LOCAL-SOCKET
- added async support to the negprot client code
- removed two unused parameters from smbcli_full_connection() code
- converted smbclient to use smbcli_full_connection() rather than
reinventing everything itself
socket connections. This was complicated by a few factors:
- it meant moving the event context from clitransport to clisocket,
so lots of structures changed
- we need to asynchronously handle connection to lists of port
numbers, not just one port number. The code internally tries each
port in the list in turn, without ever blocking
- the man page on how connect() is supposed to work asynchronously
doesn't work in practice (now why doesn't this surprise me?). The
getsockopt() for SOL_ERROR is supposed to retrieve the error, but
in fact the next (unrelated) connect() call on the same socket also
gets an error, though not the right error. To work around this I
need to tear down the whole socket between each attempted port. I
hate posix.
Note that clisocket.c still does a blocking name resolution call in
smbcli_sock_connect_byname(). That will be fixed when we add the async
NBT resolution code.
Also note that I arranged things so that every SMB connection is now
async internally, so using plain smbclient or smbtorture tests all the
async features of this new code.
This removes the duplicate named SEC_RIGHTS_MAXIMUM_ALLOWED and
SEC_RIGHTS_FULL_CONTROL, which are just other names for
SEC_FLAG_MAXIMUM_ALLOWED and SEC_RIGHTS_FILE_ALL. The latter names
match the new naming conventions in security.idl
Also added names for the generic->specific mappings for files are
directories
- removed the clitar code. It is unmaintained, and a horribly badly done hack
- removed client.h as it contained mostly unused definitions
- removed the unused clidfs.c code
definitions for security access masks, in security.idl
The previous definitions were inconsistently named, and contained many
duplicate and misleading entries. I kept finding myself tripping up
while using them.
