source4/scripting/devel/pfm_verify.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3 #
   4 # script to verify cached prefixMap on remote
   5 # server against the prefixMap stored in Schema NC
   6 #
   7 # Copyright (C) Kamen Mazdrashki <kamenim@samba.org> 2010
   8 #
   9 # This program is free software; you can redistribute it and/or modify
  10 # it under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation; either version 3 of the License, or
  12 # (at your option) any later version.
  13 #
  14 # This program is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 # GNU General Public License for more details.
  18 #
  19 # You should have received a copy of the GNU General Public License
  20 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 #
  22
  23 import os
  24 import sys
  25 from optparse import OptionParser
  26
  27 sys.path.insert(0, "bin/python")
  28
  29 import samba
  30 import samba.getopt as options
  31 from ldb import SCOPE_BASE, SCOPE_SUBTREE
  32 from samba.dcerpc import drsuapi, misc, drsblobs
  33 from samba.drs_utils import drs_DsBind
  34 from samba.samdb import SamDB
  35 from samba.auth import system_session
  36 from samba.ndr import ndr_pack, ndr_unpack
  37
  38
  39 def _samdb_fetch_pfm(samdb):
  40     """Fetch prefixMap stored in SamDB using LDB connection"""
  41     res = samdb.search(base=samdb.get_schema_basedn(), expression="", scope=SCOPE_BASE, attrs=["*"])
  42     assert len(res) == 1
  43     pfm = ndr_unpack(drsblobs.prefixMapBlob,
  44                      str(res[0]['prefixMap']))
  45
  46     pfm_schi = _samdb_fetch_schi(samdb)
  47
  48     return (pfm.ctr, pfm_schi)
  49
  50 def _samdb_fetch_schi(samdb):
  51     """Fetch schemaInfo stored in SamDB using LDB connection"""
  52     res = samdb.search(base=samdb.get_schema_basedn(), expression="", scope=SCOPE_BASE, attrs=["*"])
  53     assert len(res) == 1
  54     if 'schemaInfo' in res[0]:
  55         pfm_schi = ndr_unpack(drsblobs.schemaInfoBlob,
  56                               str(res[0]['schemaInfo']))
  57     else:
  58         pfm_schi = drsblobs.schemaInfoBlob()
  59         pfm_schi.marker = 0xFF;
  60     return pfm_schi
  61
  62 def _drs_fetch_pfm(server, samdb, creds, lp):
  63     """Fetch prefixMap using DRS interface"""
  64     binding_str = "ncacn_ip_tcp:%s[print,seal]" % server
  65
  66     drs = drsuapi.drsuapi(binding_str, lp, creds)
  67     (drs_handle, supported_extensions) = drs_DsBind(drs)
  68     print "DRS Handle: %s" % drs_handle
  69
  70     req8 = drsuapi.DsGetNCChangesRequest8()
  71
  72     dest_dsa = misc.GUID("9c637462-5b8c-4467-aef2-bdb1f57bc4ef")
  73     replica_flags = 0
  74
  75     req8.destination_dsa_guid = dest_dsa
  76     req8.source_dsa_invocation_id = misc.GUID(samdb.get_invocation_id())
  77     req8.naming_context = drsuapi.DsReplicaObjectIdentifier()
  78     req8.naming_context.dn = unicode(samdb.get_schema_basedn())
  79     req8.highwatermark = drsuapi.DsReplicaHighWaterMark()
  80     req8.highwatermark.tmp_highest_usn = 0
  81     req8.highwatermark.reserved_usn = 0
  82     req8.highwatermark.highest_usn = 0
  83     req8.uptodateness_vector = None
  84     req8.replica_flags = replica_flags
  85     req8.max_object_count = 0
  86     req8.max_ndr_size = 402116
  87     req8.extended_op = 0
  88     req8.fsmo_info = 0
  89     req8.partial_attribute_set = None
  90     req8.partial_attribute_set_ex = None
  91     req8.mapping_ctr.num_mappings = 0
  92     req8.mapping_ctr.mappings = None
  93
  94     (level, ctr) = drs.DsGetNCChanges(drs_handle, 8, req8)
  95     pfm = ctr.mapping_ctr
  96     # check for schemaInfo element
  97     pfm_it = pfm.mappings[-1]
  98     assert pfm_it.id_prefix == 0
  99     assert pfm_it.oid.length == 21
 100     s = ''
 101     for x in pfm_it.oid.binary_oid:
 102         s += chr(x)
 103     pfm_schi = ndr_unpack(drsblobs.schemaInfoBlob, s)
 104     assert pfm_schi.marker == 0xFF
 105     # remove schemaInfo element
 106     pfm.num_mappings -= 1
 107     return (pfm, pfm_schi)
 108
 109 def _pfm_verify(drs_pfm, ldb_pfm):
 110     errors = []
 111     if drs_pfm.num_mappings != ldb_pfm.num_mappings:
 112         errors.append("Different count of prefixes: drs = %d, ldb = %d"
 113                       % (drs_pfm.num_mappings, ldb_pfm.num_mappings))
 114     count = min(drs_pfm.num_mappings, ldb_pfm.num_mappings)
 115     for i in range(0, count):
 116         it_err = []
 117         drs_it = drs_pfm.mappings[i]
 118         ldb_it = ldb_pfm.mappings[i]
 119         if drs_it.id_prefix != ldb_it.id_prefix:
 120             it_err.append("id_prefix")
 121         if drs_it.oid.length != ldb_it.oid.length:
 122             it_err.append("oid.length")
 123         if drs_it.oid.binary_oid != ldb_it.oid.binary_oid:
 124             it_err.append("oid.binary_oid")
 125         if len(it_err):
 126             errors.append("[%2d] differences in (%s)" % (i, it_err))
 127     return errors
 128
 129 def _pfm_schi_verify(drs_schi, ldb_schi):
 130     errors = []
 131     print drs_schi.revision
 132     print drs_schi.invocation_id
 133     if drs_schi.marker != ldb_schi.marker:
 134         errors.append("Different marker in schemaInfo: drs = %d, ldb = %d"
 135                       % (drs_schi.marker, ldb_schi.marker))
 136     if drs_schi.revision != ldb_schi.revision:
 137         errors.append("Different revision in schemaInfo: drs = %d, ldb = %d"
 138                       % (drs_schi.revision, ldb_schi.revision))
 139     if drs_schi.invocation_id != ldb_schi.invocation_id:
 140         errors.append("Different invocation_id in schemaInfo: drs = %s, ldb = %s"
 141                       % (drs_schi.invocation_id, ldb_schi.invocation_id))
 142     return errors
 143
 144 ########### main code ###########
 145 if __name__ == "__main__":
 146     # command line parsing
 147     parser = OptionParser("pfm_verify.py [options] server")
 148     sambaopts = options.SambaOptions(parser)
 149     parser.add_option_group(sambaopts)
 150     credopts = options.CredentialsOptionsDouble(parser)
 151     parser.add_option_group(credopts)
 152
 153     (opts, args) = parser.parse_args()
 154
 155     lp = sambaopts.get_loadparm()
 156     creds = credopts.get_credentials(lp)
 157
 158     if len(args) != 1:
 159         import os
 160         if not "DC_SERVER" in os.environ.keys():
 161              parser.error("You must supply a server")
 162         args.append(os.environ["DC_SERVER"])
 163
 164     if creds.is_anonymous():
 165         parser.error("You must supply credentials")
 166         pass
 167
 168     server = args[0]
 169
 170     samdb = SamDB(url="ldap://%s" % server,
 171                   session_info=system_session(lp),
 172                   credentials=creds, lp=lp)
 173
 174     exit_code = 0
 175     (drs_pfm, drs_schi) = _drs_fetch_pfm(server, samdb, creds, lp)
 176     (ldb_pfm, ldb_schi) = _samdb_fetch_pfm(samdb)
 177     # verify prefixMaps
 178     errors = _pfm_verify(drs_pfm, ldb_pfm)
 179     if len(errors):
 180         print "prefixMap verification errors:"
 181         print "%s" % errors
 182         exit_code = 1
 183     # verify schemaInfos
 184     errors = _pfm_schi_verify(drs_schi, ldb_schi)
 185     if len(errors):
 186         print "schemaInfo verification errors:"
 187         print "%s" % errors
 188         exit_code = 2
 189
 190     if exit_code != 0:
 191         sys.exit(exit_code)