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#!/usr/bin/python3 # # Compute our KCC topology # # Copyright (C) Dave Craft 2011 # Copyright (C) Andrew Bartlett 2015 # # Andrew Bartlett's alleged work performed by his underlings Douglas # Bagnall and Garming Sam. # # 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 os import sys import random # ensure we get messages out immediately, so they get in the samba logs, # and don't get swallowed by a timeout os.environ['PYTHONUNBUFFERED'] = '1' # forcing GMT avoids a problem in some timezones with kerberos. Both MIT # heimdal can get mutual authentication errors due to the 24 second difference # between UTC and GMT when using some zone files (eg. the PDT zone from # the US) os.environ["TZ"] = "GMT" # Find right directory when running from source tree import optparse import time from samba import getopt as options from samba.kcc.graph_utils import verify_and_dot, list_verify_tests from samba.kcc.graph_utils import GraphError import logging from samba.kcc.debug import logger, DEBUG, DEBUG_FN from samba.kcc import KCC # If DEFAULT_RNG_SEED is None, /dev/urandom or system time is used. DEFAULT_RNG_SEED = None def test_all_reps_from(kcc, dburl, lp, creds, unix_now, rng_seed=None, ldif_file=None): """Run the KCC from all DSAs in read-only mode The behaviour depends on the global opts variable which contains command line variables. Usually you will want to run it with opt.dot_file_dir set (via --dot-file-dir) to see the graphs that would be created from each DC. :param lp: a loadparm object. :param creds: a Credentials object. :param unix_now: the unix epoch time as an integer :param rng_seed: a seed for the random number generator :return None: """ # This implies readonly and attempt_live_connections dsas = kcc.list_dsas() samdb = kcc.samdb needed_parts = {} current_parts = {} guid_to_dnstr = {} for site in kcc.site_table.values(): guid_to_dnstr.update((str(dsa.dsa_guid), dnstr) for dnstr, dsa in site.dsa_table.items()) dot_edges = [] dot_vertices = [] colours = [] vertex_colours = [] for dsa_dn in dsas: if rng_seed is not None: random.seed(rng_seed) kcc = KCC(unix_now, readonly=True, verify=opts.verify, debug=opts.debug, dot_file_dir=opts.dot_file_dir) if ldif_file is not None: try: # The dburl in this case is a temporary database. # Its non-existence is ensured at the script startup. # If it exists, it is from a previous iteration of # this loop -- unless we're in an unfortunate race. # Because this database is temporary, it lacks some # detail and needs to be re-created anew to set the # local dsa. os.unlink(dburl) except OSError: pass kcc.import_ldif(dburl, lp, ldif_file, dsa_dn) else: kcc.samdb = samdb kcc.run(dburl, lp, creds, forced_local_dsa=dsa_dn, forget_local_links=opts.forget_local_links, forget_intersite_links=opts.forget_intersite_links, attempt_live_connections=opts.attempt_live_connections) current, needed = kcc.my_dsa.get_rep_tables() for dsa in kcc.my_site.dsa_table.values(): if dsa is kcc.my_dsa: continue kcc.translate_ntdsconn(dsa) c, n = dsa.get_rep_tables() current.update(c) needed.update(n) for name, rep_table, rep_parts in ( ('needed', needed, needed_parts), ('current', current, current_parts)): for part, nc_rep in rep_table.items(): edges = rep_parts.setdefault(part, []) for reps_from in nc_rep.rep_repsFrom: source = guid_to_dnstr[str(reps_from.source_dsa_obj_guid)] dest = guid_to_dnstr[str(nc_rep.rep_dsa_guid)] edges.append((source, dest)) for site in kcc.site_table.values(): for dsa in site.dsa_table.values(): if dsa.is_ro(): vertex_colours.append('#cc0000') else: vertex_colours.append('#0000cc') dot_vertices.append(dsa.dsa_dnstr) if dsa.connect_table: DEBUG_FN("DSA %s %s connections:\n%s" % (dsa.dsa_dnstr, len(dsa.connect_table), [x.from_dnstr for x in dsa.connect_table.values()])) for con in dsa.connect_table.values(): if con.is_rodc_topology(): colours.append('red') else: colours.append('blue') dot_edges.append((con.from_dnstr, dsa.dsa_dnstr)) verify_and_dot('all-dsa-connections', dot_edges, vertices=dot_vertices, label="all dsa NTDSConnections", properties=(), debug=DEBUG, verify=opts.verify, dot_file_dir=opts.dot_file_dir, directed=True, edge_colors=colours, vertex_colors=vertex_colours) for name, rep_parts in (('needed', needed_parts), ('current', current_parts)): for part, edges in rep_parts.items(): verify_and_dot('all-repsFrom_%s__%s' % (name, part), edges, directed=True, label=part, properties=(), debug=DEBUG, verify=opts.verify, dot_file_dir=opts.dot_file_dir) ################################################## # samba_kcc entry point ################################################## parser = optparse.OptionParser("samba_kcc [options]") sambaopts = options.SambaOptions(parser) credopts = options.CredentialsOptions(parser) parser.add_option_group(sambaopts) parser.add_option_group(credopts) parser.add_option_group(options.VersionOptions(parser)) parser.add_option("--readonly", default=False, help="compute topology but do not update database", action="store_true") parser.add_option("--debug", help="debug output", action="store_true") parser.add_option("--verify", help="verify that assorted invariants are kept", action="store_true") parser.add_option("--list-verify-tests", help=("list what verification actions are available " "and do nothing else"), action="store_true") parser.add_option("--dot-file-dir", default=None, help="Write Graphviz .dot files to this directory") parser.add_option("--seed", help="random number seed", type=int, default=DEFAULT_RNG_SEED) parser.add_option("--importldif", help="import topology ldif file", type=str, metavar="<file>") parser.add_option("--exportldif", help="export topology ldif file", type=str, metavar="<file>") parser.add_option("-H", "--URL", help="LDB URL for database or target server", type=str, metavar="<URL>", dest="dburl") parser.add_option("--tmpdb", help="schemaless database file to create for ldif import", type=str, metavar="<file>") parser.add_option("--now", help=("assume current time is this ('YYYYmmddHHMMSS[tz]'," " default: system time)"), type=str, metavar="<date>") parser.add_option("--forced-local-dsa", help="run calculations assuming the DSA is this DN", type=str, metavar="<DSA>") parser.add_option("--attempt-live-connections", default=False, help="Attempt to connect to other DSAs to test links", action="store_true") parser.add_option("--list-valid-dsas", default=False, help=("Print a list of DSA dnstrs that could be" " used in --forced-local-dsa"), action="store_true") parser.add_option("--test-all-reps-from", default=False, help="Create and verify a graph of reps-from for every DSA", action="store_true") parser.add_option("--forget-local-links", default=False, help="pretend not to know the existing local topology", action="store_true") parser.add_option("--forget-intersite-links", default=False, help="pretend not to know the existing intersite topology", action="store_true") opts, args = parser.parse_args() if opts.list_verify_tests: list_verify_tests() sys.exit(0) if opts.test_all_reps_from: opts.readonly = True if opts.debug: logger.setLevel(logging.DEBUG) elif opts.readonly: logger.setLevel(logging.INFO) else: logger.setLevel(logging.WARNING) random.seed(opts.seed) if opts.now: for timeformat in ("%Y%m%d%H%M%S%Z", "%Y%m%d%H%M%S"): try: now_tuple = time.strptime(opts.now, timeformat) break except ValueError: pass else: # else happens if break doesn't --> no match print("could not parse time '%s'" % (opts.now), file = sys.stderr) sys.exit(1) unix_now = int(time.mktime(now_tuple)) else: unix_now = int(time.time()) lp = sambaopts.get_loadparm() # only log warnings/errors by default, unless the user has specified otherwise if opts.debug is None: lp.set('log level', '1') creds = credopts.get_credentials(lp, fallback_machine=True) if opts.dburl is None: if opts.importldif: opts.dburl = opts.tmpdb else: opts.dburl = lp.samdb_url() elif opts.importldif: logger.error("Don't use -H/--URL with --importldif, use --tmpdb instead") sys.exit(1) # Instantiate Knowledge Consistency Checker and perform run kcc = KCC(unix_now, readonly=opts.readonly, verify=opts.verify, debug=opts.debug, dot_file_dir=opts.dot_file_dir) if opts.exportldif: rc = kcc.export_ldif(opts.dburl, lp, creds, opts.exportldif) sys.exit(rc) if opts.importldif: if opts.tmpdb is None or opts.tmpdb.startswith('ldap'): logger.error("Specify a target temp database file with --tmpdb option") sys.exit(1) if os.path.exists(opts.tmpdb): logger.error("The temp database file (%s) specified with --tmpdb " "already exists. We refuse to clobber it." % opts.tmpdb) sys.exit(1) rc = kcc.import_ldif(opts.tmpdb, lp, opts.importldif, forced_local_dsa=opts.forced_local_dsa) if rc != 0: sys.exit(rc) kcc.load_samdb(opts.dburl, lp, creds, force=False) if opts.test_all_reps_from: test_all_reps_from(kcc, opts.dburl, lp, creds, unix_now, rng_seed=opts.seed, ldif_file=opts.importldif) sys.exit() if opts.list_valid_dsas: print('\n'.join(kcc.list_dsas())) sys.exit() try: rc = kcc.run(opts.dburl, lp, creds, opts.forced_local_dsa, opts.forget_local_links, opts.forget_intersite_links, attempt_live_connections=opts.attempt_live_connections) sys.exit(rc) except GraphError as e: print( e) sys.exit(1)