Current File : //lib/python3/dist-packages/samba/netcmd/domain/level.py
# domain management - domain level
#
# Copyright Matthias Dieter Wallnoefer 2009
# Copyright Andrew Kroeger 2009
# Copyright Jelmer Vernooij 2007-2012
# Copyright Giampaolo Lauria 2011
# Copyright Matthieu Patou <mat@matws.net> 2011
# Copyright Andrew Bartlett 2008-2015
# Copyright Stefan Metzmacher 2012
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
import ldb
import samba.getopt as options
from samba.auth import system_session
from samba.dsdb import check_and_update_fl, DS_DOMAIN_FUNCTION_2000
from samba.netcmd import Command, CommandError, Option
from samba.samdb import SamDB
from samba import functional_level
class cmd_domain_level(Command):
"""Raise domain and forest function levels."""
synopsis = "%prog (show|raise <options>) [options]"
takes_optiongroups = {
"sambaopts": options.SambaOptions,
"credopts": options.CredentialsOptions,
"versionopts": options.VersionOptions,
}
takes_options = [
Option("-H", "--URL", help="LDB URL for database or target server", type=str,
metavar="URL", dest="H"),
Option("-q", "--quiet", help="Be quiet", action="store_true"), # unused
Option("--forest-level", type="choice", choices=["2003", "2008", "2008_R2", "2012", "2012_R2", "2016"],
help="The forest function level (2003 | 2008 | 2008_R2 | 2012 | 2012_R2 | 2016)"),
Option("--domain-level", type="choice", choices=["2003", "2008", "2008_R2", "2012", "2012_R2", "2016"],
help="The domain function level (2003 | 2008 | 2008_R2 | 2012 | 2012_R2 | 2016)")
]
takes_args = ["subcommand"]
def run(self, subcommand, H=None, forest_level=None, domain_level=None,
quiet=False, credopts=None, sambaopts=None, versionopts=None):
if subcommand not in ["show", "raise"]:
raise CommandError("invalid argument: '%s' (choose from 'show', 'raise')" % subcommand)
lp = sambaopts.get_loadparm()
creds = credopts.get_credentials(lp, fallback_machine=True)
samdb = SamDB(url=H, session_info=system_session(),
credentials=creds, lp=lp)
domain_dn = samdb.domain_dn()
in_transaction = False
if subcommand == "raise" and (H is None or not H.startswith("ldap")):
samdb.transaction_start()
in_transaction = True
try:
check_and_update_fl(samdb, lp)
except Exception as e:
samdb.transaction_cancel()
raise e
try:
res_forest = samdb.search("CN=Partitions,%s" % samdb.get_config_basedn(),
scope=ldb.SCOPE_BASE, attrs=["msDS-Behavior-Version"])
assert len(res_forest) == 1
res_domain = samdb.search(domain_dn, scope=ldb.SCOPE_BASE,
attrs=["msDS-Behavior-Version", "nTMixedDomain"])
assert len(res_domain) == 1
res_domain_cross = samdb.search("CN=Partitions,%s" % samdb.get_config_basedn(),
scope=ldb.SCOPE_SUBTREE,
expression="(&(objectClass=crossRef)(nCName=%s))" % domain_dn,
attrs=["msDS-Behavior-Version"])
assert len(res_domain_cross) == 1
res_dc_s = samdb.search("CN=Sites,%s" % samdb.get_config_basedn(),
scope=ldb.SCOPE_SUBTREE, expression="(objectClass=nTDSDSA)",
attrs=["msDS-Behavior-Version"])
assert len(res_dc_s) >= 1
# default values, since "msDS-Behavior-Version" does not exist on Windows 2000 AD
level_forest = DS_DOMAIN_FUNCTION_2000
level_domain = DS_DOMAIN_FUNCTION_2000
if "msDS-Behavior-Version" in res_forest[0]:
level_forest = int(res_forest[0]["msDS-Behavior-Version"][0])
if "msDS-Behavior-Version" in res_domain[0]:
level_domain = int(res_domain[0]["msDS-Behavior-Version"][0])
level_domain_mixed = int(res_domain[0]["nTMixedDomain"][0])
min_level_dc = None
for msg in res_dc_s:
if "msDS-Behavior-Version" in msg:
if min_level_dc is None or int(msg["msDS-Behavior-Version"][0]) < min_level_dc:
min_level_dc = int(msg["msDS-Behavior-Version"][0])
else:
min_level_dc = DS_DOMAIN_FUNCTION_2000
# well, this is the least
break
if level_forest < DS_DOMAIN_FUNCTION_2000 or level_domain < DS_DOMAIN_FUNCTION_2000:
raise CommandError("Domain and/or forest function level(s) is/are invalid. Correct them or reprovision!")
if min_level_dc < DS_DOMAIN_FUNCTION_2000:
raise CommandError("Lowest function level of a DC is invalid. Correct this or reprovision!")
if level_forest > level_domain:
raise CommandError("Forest function level is higher than the domain level(s). Correct this or reprovision!")
if level_domain > min_level_dc:
raise CommandError("Domain function level is higher than the lowest function level of a DC. Correct this or reprovision!")
except Exception as e:
if in_transaction:
samdb.transaction_cancel()
raise e
def do_show():
self.message("Domain and forest function level for domain '%s'" % domain_dn)
if level_forest == DS_DOMAIN_FUNCTION_2000 and level_domain_mixed != 0:
self.message("\nATTENTION: You run SAMBA 4 on a forest function level lower than Windows 2000 (Native). This isn't supported! Please raise!")
if level_domain == DS_DOMAIN_FUNCTION_2000 and level_domain_mixed != 0:
self.message("\nATTENTION: You run SAMBA 4 on a domain function level lower than Windows 2000 (Native). This isn't supported! Please raise!")
if min_level_dc == DS_DOMAIN_FUNCTION_2000 and level_domain_mixed != 0:
self.message("\nATTENTION: You run SAMBA 4 on a lowest function level of a DC lower than Windows 2003. This isn't supported! Please step-up or upgrade the concerning DC(s)!")
self.message("")
outstr = functional_level.level_to_string(level_forest)
self.message("Forest function level: (Windows) " + outstr)
if level_domain == DS_DOMAIN_FUNCTION_2000 and level_domain_mixed:
outstr = "2000 mixed (NT4 DC support)"
else:
outstr = functional_level.level_to_string(level_domain)
self.message("Domain function level: (Windows) " + outstr)
outstr = functional_level.level_to_string(min_level_dc)
self.message("Lowest function level of a DC: (Windows) " + outstr)
return
def do_raise():
msgs = []
current_level_domain = level_domain
if domain_level is not None:
try:
new_level_domain = functional_level.string_to_level(domain_level)
except KeyError:
raise CommandError(f"New functional level '{domain_level}' is not known to Samba as an AD functional level")
if new_level_domain <= level_domain and level_domain_mixed == 0:
raise CommandError("Domain function level can't be smaller than or equal to the actual one!")
if new_level_domain > min_level_dc:
raise CommandError("Domain function level can't be higher than the lowest function level of a DC!")
# Deactivate mixed/interim domain support
if level_domain_mixed != 0:
# Directly on the base DN
m = ldb.Message()
m.dn = ldb.Dn(samdb, domain_dn)
m["nTMixedDomain"] = ldb.MessageElement("0",
ldb.FLAG_MOD_REPLACE, "nTMixedDomain")
samdb.modify(m)
# Under partitions
m = ldb.Message()
m.dn = res_domain_cross[0].dn
m["nTMixedDomain"] = ldb.MessageElement("0",
ldb.FLAG_MOD_REPLACE, "nTMixedDomain")
try:
samdb.modify(m)
except ldb.LdbError as e:
(enum, emsg) = e.args
if enum != ldb.ERR_UNWILLING_TO_PERFORM:
raise
# Directly on the base DN
m = ldb.Message()
m.dn = ldb.Dn(samdb, domain_dn)
m["msDS-Behavior-Version"] = ldb.MessageElement(
str(new_level_domain), ldb.FLAG_MOD_REPLACE,
"msDS-Behavior-Version")
samdb.modify(m)
# Under partitions
m = ldb.Message()
m.dn = res_domain_cross[0].dn
m["msDS-Behavior-Version"] = ldb.MessageElement(
str(new_level_domain), ldb.FLAG_MOD_REPLACE,
"msDS-Behavior-Version")
try:
samdb.modify(m)
except ldb.LdbError as e2:
(enum, emsg) = e2.args
if enum != ldb.ERR_UNWILLING_TO_PERFORM:
raise
current_level_domain = new_level_domain
msgs.append("Domain function level changed!")
if forest_level is not None:
new_level_forest = functional_level.string_to_level(forest_level)
if new_level_forest <= level_forest:
raise CommandError("Forest function level can't be smaller than or equal to the actual one!")
if new_level_forest > current_level_domain:
raise CommandError("Forest function level can't be higher than the domain function level(s). Please raise it/them first!")
m = ldb.Message()
m.dn = ldb.Dn(samdb, "CN=Partitions,%s" % samdb.get_config_basedn())
m["msDS-Behavior-Version"] = ldb.MessageElement(
str(new_level_forest), ldb.FLAG_MOD_REPLACE,
"msDS-Behavior-Version")
samdb.modify(m)
msgs.append("Forest function level changed!")
msgs.append("All changes applied successfully!")
self.message("\n".join(msgs))
return
if subcommand == "show":
assert not in_transaction
do_show()
return
elif subcommand == "raise":
try:
do_raise()
except Exception as e:
if in_transaction:
samdb.transaction_cancel()
raise e
if in_transaction:
samdb.transaction_commit()
return
raise AssertionError("Internal Error subcommand[%s] not handled" % subcommand)
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