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# ether.py - lookup functions for ethernet addresses
#
# Copyright (C) 2010, 2011 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 struct
import constants
import common
def ether_aton(ether):
"""Converst an ethernet address to binary form in network byte order."""
return struct.pack('BBBBBB', *(int(x, 16) for x in ether.split(':')))
def ether_ntoa(ether):
"""Conversts an ethernet address in network byte order to the string
representation."""
return ':'.join('%x' % x for x in struct.unpack('6B', ether))
attmap = common.Attributes(cn='cn', macAddress='macAddress')
filter = '(objectClass=ieee802Device)'
class EtherRequest(common.Request):
def write(self, dn, attributes, parameters):
# get name and check against requested name
names = attributes['cn']
if not names:
print 'Error: entry %s does not contain %s value' % ( dn, attmap['cn'])
if 'cn' in parameters:
if parameters['cn'].lower() not in (x.lower() for x in names):
return # skip entry
names = ( parameters['cn'], )
# get addresses and convert to binary form
addresses = [ether_aton(x) for x in attributes['macAddress']]
if not addresses:
print 'Error: entry %s does not contain %s value' % ( dn, attmap['macAddress'])
if 'macAddress' in parameters:
if ether_aton(parameters['macAddress']) not in addresses:
return
addresses = ( ether_aton(parameters['macAddress']), )
# 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, fp):
return dict(cn=fp.read_string())
class EtherByEtherRequest(EtherRequest):
action = constants.NSLCD_ACTION_ETHER_BYETHER
def read_parameters(self, fp):
return dict(macAddress=ether_ntoa(fp.read(6)))
class EtherAllRequest(EtherRequest):
action = constants.NSLCD_ACTION_ETHER_ALL
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