python/samba/sites.py

   1 # python site manipulation code
   2 # Copyright Matthieu Patou <mat@matws.net> 2011
   3 #
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation; either version 3 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 #
  17
  18 """Manipulating sites."""
  19
  20 import ldb
  21 from ldb import FLAG_MOD_ADD
  22
  23
  24 class SiteException(Exception):
  25     """Base element for Sites errors"""
  26
  27     def __init__(self, value):
  28         self.value = value
  29
  30     def __str__(self):
  31         return "SiteException: " + self.value
  32
  33
  34 class SiteNotFoundException(SiteException):
  35     """Raised when the site is not found and it's expected to exists."""
  36
  37     def __init__(self, value):
  38         self.value = value
  39
  40     def __str__(self):
  41         return "SiteNotFoundException: " + self.value
  42
  43 class SiteAlreadyExistsException(SiteException):
  44     """Raised when the site is not found and it's expected not to exists."""
  45
  46     def __init__(self, value):
  47         self.value = value
  48
  49     def __str__(self):
  50         return "SiteAlreadyExists: " + self.value
  51
  52 class SiteServerNotEmptyException(SiteException):
  53     """Raised when the site still has servers attached."""
  54
  55     def __init__(self, value):
  56         self.value = value
  57
  58     def __str__(self):
  59         return "SiteServerNotEmpty: " + self.value
  60
  61 def create_site(samdb, configDn, siteName):
  62     """
  63     Create a site
  64
  65     :param samdb: A samdb connection
  66     :param configDn: The DN of the configuration partition
  67     :param siteName: Name of the site to create
  68     :return: True upon success
  69     :raise SiteAlreadyExists: if the site to be created already exists.
  70     """
  71
  72     ret = samdb.search(base=configDn, scope=ldb.SCOPE_SUBTREE,
  73                     expression='(&(objectclass=Site)(cn=%s))' % siteName)
  74     if len(ret) != 0:
  75         raise SiteAlreadyExistsException('A site with the name %s already exists' % siteName)
  76
  77     m = ldb.Message()
  78     m.dn = ldb.Dn(samdb, "Cn=%s,CN=Sites,%s" % (siteName, str(configDn)))
  79     m["objectclass"] = ldb.MessageElement("site", FLAG_MOD_ADD, "objectclass")
  80
  81     samdb.add(m)
  82
  83     m2 = ldb.Message()
  84     m2.dn = ldb.Dn(samdb, "Cn=NTDS Site Settings,%s" % str(m.dn))
  85     m2["objectclass"] = ldb.MessageElement("nTDSSiteSettings", FLAG_MOD_ADD, "objectclass")
  86
  87     samdb.add(m2)
  88
  89     m3 = ldb.Message()
  90     m3.dn = ldb.Dn(samdb, "Cn=Servers,%s" % str(m.dn))
  91     m3["objectclass"] = ldb.MessageElement("serversContainer", FLAG_MOD_ADD, "objectclass")
  92
  93     samdb.add(m3)
  94
  95     return True
  96
  97 def delete_site(samdb, configDn, siteName):
  98     """
  99     Delete a site
 100
 101     :param samdb: A samdb connection
 102     :param configDn: The DN of the configuration partition
 103     :param siteName: Name of the site to delete
 104     :return: True upon success
 105     :raise SiteNotFoundException: if the site to be deleted do not exists.
 106     :raise SiteServerNotEmpty: if the site has still servers in it.
 107     """
 108
 109     dnsites = ldb.Dn(samdb, "CN=Sites,%s" % (str(configDn)))
 110     dnsite = ldb.Dn(samdb, "Cn=%s,CN=Sites,%s" % (siteName, str(configDn)))
 111     dnserver = ldb.Dn(samdb, "Cn=Servers,%s" % str(dnsite))
 112
 113     ret = samdb.search(base=dnsites, scope=ldb.SCOPE_ONELEVEL,
 114                     expression='(dn=%s)' % str(dnsite))
 115     if len(ret) != 1:
 116         raise SiteNotFoundException('Site %s do not exists' % siteName)
 117
 118     ret = samdb.search(base=dnserver, scope=ldb.SCOPE_ONELEVEL,
 119                     expression='(objectclass=server)')
 120     if len(ret) != 0:
 121         raise SiteServerNotEmptyException('Site %s still has servers in it, move them before removal' % siteName)
 122
 123     samdb.delete(dnsite, ["tree_delete:0"])
 124
 125     return True