Arthur de Jong

Open Source / Free Software developer

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+
+# ether.py - lookup functions for ethernet addresses
+#
+# Copyright (C) 2010 Arthur de Jong
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library 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
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301 USA
+
+import constants
+import common
+
+import struct
+import ldap.filter
+
+
+def ether_aton(ether):
+ return struct.pack('BBBBBB', *(int(x, 16) for x in ether.split(':')))
+
+def ether_ntoa(ether):
+ return ':'.join('%x' % x for x in struct.unpack('6B', ether))
+
+
+class EtherRequest(common.Request):
+
+ filter = '(objectClass=ieee802Device)'
+
+ attmap_cn = 'cn'
+ attmap_macAddress = 'macAddress'
+
+ attributes = ( 'cn', 'macAddress' )
+
+ def __init__(self, *args):
+ super(EtherRequest, self).__init__(*args)
+ self.ether = None
+
+ def write(self, entry):
+ dn, attributes = entry
+ # get name and check against requested user name
+ names = attributes.get(self.attmap_cn, [])
+ if not names:
+ print 'Error: entry %s does not contain %s value' % ( dn, self.attmap_cn)
+ if self.name:
+ if self.name.lower() not in (x.lower() for x in names):
+ return # skip entry
+ names = ( self.name, )
+ # get addresses and convert to binary form
+ addresses = [ether_aton(x) for x in attributes.get(self.attmap_macAddress, [])]
+ if not addresses:
+ print 'Error: entry %s does not contain %s value' % ( dn, self.attmap_macAddress)
+ if self.ether:
+ if self.ether not in addresses:
+ return
+ addresses = ( self.ether, )
+ # write results
+ for name in names:
+ for ether in addresses:
+ self.fp.write_int32(constants.NSLCD_RESULT_BEGIN)
+ self.fp.write_string(name)
+ self.fp.write(ether)
+
+
+class EtherByNameRequest(EtherRequest):
+
+ action = constants.NSLCD_ACTION_ETHER_BYNAME
+
+ def read_parameters(self):
+ self.name = self.fp.read_string()
+
+ def mk_filter(self):
+ return '(&%s(%s=%s))' % ( self.filter,
+ self.attmap_cn, ldap.filter.escape_filter_chars(self.name) )
+
+
+class EtherByEtherRequest(EtherRequest):
+
+ action = constants.NSLCD_ACTION_ETHER_BYETHER
+
+ def read_parameters(self):
+ self.ether = self.fp.read(6)
+
+ def mk_filter(self):
+ return '(&%s(%s=%s))' % ( self.filter,
+ self.attmap_macAddress, ether_ntoa(self.ether) )
+
+
+class EtherAllRequest(EtherRequest):
+
+ action = constants.NSLCD_ACTION_ETHER_ALL