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, LdbError
  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 "%s: %s" % (self.__class__.__name__, self.value)
  32
  33
  34 class SiteNotFoundException(SiteException):
  35     """Raised when the site is not found and it's expected to exists."""
  36
  37
  38 class SiteAlreadyExistsException(SiteException):
  39     """Raised when the site is not found and it's expected not to exists."""
  40
  41
  42 class SiteServerNotEmptyException(SiteException):
  43     """Raised when the site still has servers attached."""
  44
  45
  46 def create_site(samdb, configDn, siteName):
  47     """
  48     Create a site
  49
  50     :param samdb: A samdb connection
  51     :param configDn: The DN of the configuration partition
  52     :param siteName: Name of the site to create
  53     :return: True upon success
  54     :raise SiteAlreadyExists: if the site to be created already exists.
  55     """
  56
  57     ret = samdb.search(base=configDn, scope=ldb.SCOPE_SUBTREE,
  58                        expression='(&(objectclass=Site)(cn=%s))' % siteName)
  59     if len(ret) != 0:
  60         raise SiteAlreadyExistsException('A site with the name %s already exists' % siteName)
  61
  62     m = ldb.Message()
  63     m.dn = ldb.Dn(samdb, "Cn=%s,CN=Sites,%s" % (siteName, str(configDn)))
  64     m["objectclass"] = ldb.MessageElement("site", FLAG_MOD_ADD, "objectclass")
  65
  66     samdb.add(m)
  67
  68     m2 = ldb.Message()
  69     m2.dn = ldb.Dn(samdb, "Cn=NTDS Site Settings,%s" % str(m.dn))
  70     m2["objectclass"] = ldb.MessageElement("nTDSSiteSettings", FLAG_MOD_ADD, "objectclass")
  71
  72     samdb.add(m2)
  73
  74     m3 = ldb.Message()
  75     m3.dn = ldb.Dn(samdb, "Cn=Servers,%s" % str(m.dn))
  76     m3["objectclass"] = ldb.MessageElement("serversContainer", FLAG_MOD_ADD, "objectclass")
  77
  78     samdb.add(m3)
  79
  80     return True
  81
  82
  83 def delete_site(samdb, configDn, siteName):
  84     """
  85     Delete a site
  86
  87     :param samdb: A samdb connection
  88     :param configDn: The DN of the configuration partition
  89     :param siteName: Name of the site to delete
  90     :return: True upon success
  91     :raise SiteNotFoundException: if the site to be deleted do not exists.
  92     :raise SiteServerNotEmpty: if the site has still servers in it.
  93     """
  94
  95     dnsite = ldb.Dn(samdb, "CN=Sites")
  96     try:
  97         dnsite.add_base(configDn)
  98     except ldb.LdbError:
  99         raise SiteException("dnsite.add_base() failed")
 100     try:
 101         dnsite.add_child("CN=X")
 102     except ldb.LdbError:
 103         raise SiteException("dnsite.add_child() failed")
 104     dnsite.set_component(0, "CN", siteName)
 105
 106     dnservers = ldb.Dn(samdb, "CN=Servers")
 107     dnservers.add_base(dnsite)
 108
 109     try:
 110         ret = samdb.search(base=dnsite, scope=ldb.SCOPE_BASE,
 111                            expression="objectClass=site")
 112         if len(ret) != 1:
 113             raise SiteNotFoundException('Site %s does not exist' % siteName)
 114     except LdbError as e:
 115         (enum, estr) = e.args
 116         if enum == ldb.ERR_NO_SUCH_OBJECT:
 117             raise SiteNotFoundException('Site %s does not exist' % siteName)
 118
 119     ret = samdb.search(base=dnservers, scope=ldb.SCOPE_ONELEVEL,
 120                        expression='(objectclass=server)')
 121     if len(ret) != 0:
 122         raise SiteServerNotEmptyException('Site %s still has servers in it, move them before removal' % siteName)
 123
 124     samdb.delete(dnsite, ["tree_delete:0"])
 125
 126     return True