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# host.py - lookup functions for host names and addresses
#
# Copyright (C) 2011, 2012, 2013 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 cache
import common
import constants
import search
attmap = common.Attributes(cn='cn', ipHostNumber='ipHostNumber')
filter = '(objectClass=ipHost)'
class Search(search.LDAPSearch):
canonical_first = ('cn', )
required = ('cn', )
class Cache(cache.Cache):
tables = ('host_cache', 'host_alias_cache', 'host_address_cache')
create_sql = '''
CREATE TABLE IF NOT EXISTS `host_cache`
( `cn` TEXT PRIMARY KEY COLLATE NOCASE,
`mtime` TIMESTAMP NOT NULL );
CREATE TABLE IF NOT EXISTS `host_alias_cache`
( `host` TEXT NOT NULL COLLATE NOCASE,
`cn` TEXT NOT NULL COLLATE NOCASE,
FOREIGN KEY(`host`) REFERENCES `host_cache`(`cn`)
ON DELETE CASCADE ON UPDATE CASCADE );
CREATE INDEX IF NOT EXISTS `host_alias_idx` ON `host_alias_cache`(`host`);
CREATE TABLE IF NOT EXISTS `host_address_cache`
( `host` TEXT NOT NULL COLLATE NOCASE,
`ipHostNumber` TEXT NOT NULL,
FOREIGN KEY(`host`) REFERENCES `host_cache`(`cn`)
ON DELETE CASCADE ON UPDATE CASCADE );
CREATE INDEX IF NOT EXISTS `host_address_idx` ON `host_address_cache`(`host`);
'''
retrieve_sql = '''
SELECT `host_cache`.`cn` AS `cn`,
`host_alias_cache`.`cn` AS `alias`,
`host_address_cache`.`ipHostNumber` AS `ipHostNumber`,
`host_cache`.`mtime` AS `mtime`
FROM `host_cache`
LEFT JOIN `host_alias_cache`
ON `host_alias_cache`.`host` = `host_cache`.`cn`
LEFT JOIN `host_address_cache`
ON `host_address_cache`.`host` = `host_cache`.`cn`
'''
retrieve_by = dict(
cn='''
( `host_cache`.`cn` = ? OR
`host_cache`.`cn` IN (
SELECT `by_alias`.`host`
FROM `host_alias_cache` `by_alias`
WHERE `by_alias`.`cn` = ?))
''',
ipHostNumber='''
`host_cache`.`cn` IN (
SELECT `by_ipHostNumber`.`host`
FROM `host_address_cache` `by_ipHostNumber`
WHERE `by_ipHostNumber`.`ipHostNumber` = ?)
''',
)
group_by = (0, ) # cn
group_columns = (1, 2) # alias, ipHostNumber
class HostRequest(common.Request):
def write(self, hostname, aliases, addresses):
self.fp.write_string(hostname)
self.fp.write_stringlist(aliases)
self.fp.write_int32(len(addresses))
for address in addresses:
self.fp.write_address(address)
def convert(self, dn, attributes, parameters):
hostnames = attributes['cn']
yield (hostnames[0], hostnames[1:], attributes['ipHostNumber'])
class HostByNameRequest(HostRequest):
action = constants.NSLCD_ACTION_HOST_BYNAME
def read_parameters(self, fp):
return dict(cn=fp.read_string())
class HostByAddressRequest(HostRequest):
action = constants.NSLCD_ACTION_HOST_BYADDR
def read_parameters(self, fp):
return dict(ipHostNumber=fp.read_address())
class HostAllRequest(HostRequest):
action = constants.NSLCD_ACTION_HOST_ALL
|
