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# ether.py - lookup functions for ethernet addresses
#
# Copyright (C) 2010-2017 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 cache
import common
import constants
import search
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, compact=True):
"""Conversts an ethernet address in network byte order to the string
representation."""
fmt = '%x' if compact else '%02x'
return ':'.join(fmt % x for x in struct.unpack('6B', ether))
attmap = common.Attributes(cn='cn', macAddress='macAddress')
filter = '(objectClass=ieee802Device)'
class Search(search.LDAPSearch):
case_insensitive = ('cn', )
limit_attributes = ('cn', 'macAddress')
required = ('cn', 'macAddress')
def mk_filter(self):
# we need a custom mk_filter because this is an | query
if 'macAddress' in self.parameters:
ether = self.parameters['macAddress']
alt_ether = ether_ntoa(ether_aton(ether), compact=False)
return '(&%s(|(%s=%s)(%s=%s)))' % (self.filter,
attmap['macAddress'], ether,
attmap['macAddress'], alt_ether)
return super(Search, self).mk_filter()
class Cache(cache.Cache):
create_sql = '''
CREATE TABLE IF NOT EXISTS `ether_cache`
( `cn` TEXT NOT NULL COLLATE NOCASE,
`macAddress` TEXT NOT NULL COLLATE NOCASE,
`mtime` TIMESTAMP NOT NULL,
UNIQUE (`cn`, `macAddress`) );
'''
class EtherRequest(common.Request):
def write(self, name, ether):
self.fp.write_string(name)
self.fp.write(ether_aton(ether))
def convert(self, dn, attributes, parameters):
for name in attributes['cn']:
for ether in attributes['macAddress']:
yield (name, 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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