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# service.py - service entry lookup routines
#
# Copyright (C) 2011-2019 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 datetime
import cache
import common
import constants
import search
attmap = common.Attributes(
cn='cn',
ipServicePort='ipServicePort',
ipServiceProtocol='ipServiceProtocol')
filter = '(objectClass=ipService)'
class Search(search.LDAPSearch):
case_sensitive = ('cn', 'ipServiceProtocol')
limit_attributes = ('ipServiceProtocol', )
canonical_first = ('cn', )
required = ('cn', 'ipServicePort', 'ipServiceProtocol')
class Cache(cache.Cache):
tables = ('service_cache', 'service_alias_cache')
create_sql = '''
CREATE TABLE IF NOT EXISTS `service_cache`
( `cn` TEXT NOT NULL,
`ipServicePort` INTEGER NOT NULL,
`ipServiceProtocol` TEXT NOT NULL,
`mtime` TIMESTAMP NOT NULL,
UNIQUE (`ipServicePort`, `ipServiceProtocol`) );
CREATE TABLE IF NOT EXISTS `service_alias_cache`
( `ipServicePort` INTEGER NOT NULL,
`ipServiceProtocol` TEXT NOT NULL,
`cn` TEXT NOT NULL,
FOREIGN KEY(`ipServicePort`) REFERENCES `service_cache`(`ipServicePort`)
ON DELETE CASCADE ON UPDATE CASCADE,
FOREIGN KEY(`ipServiceProtocol`) REFERENCES `service_cache`(`ipServiceProtocol`)
ON DELETE CASCADE ON UPDATE CASCADE );
CREATE INDEX IF NOT EXISTS `service_alias_idx1`
ON `service_alias_cache`(`ipServicePort`);
CREATE INDEX IF NOT EXISTS `service_alias_idx2`
ON `service_alias_cache`(`ipServiceProtocol`);
'''
retrieve_sql = '''
SELECT `service_cache`.`cn` AS `cn`,
`service_alias_cache`.`cn` AS `alias`,
`service_cache`.`ipServicePort`,
`service_cache`.`ipServiceProtocol`,
`mtime`
FROM `service_cache`
LEFT JOIN `service_alias_cache`
ON `service_alias_cache`.`ipServicePort` = `service_cache`.`ipServicePort`
AND `service_alias_cache`.`ipServiceProtocol` = `service_cache`.`ipServiceProtocol`
'''
retrieve_by = dict(
cn='''
( `service_cache`.`cn` = ? OR
0 < (
SELECT COUNT(*)
FROM `service_alias_cache` `by_alias`
WHERE `by_alias`.`cn` = ?
AND `by_alias`.`ipServicePort` = `service_cache`.`ipServicePort`
AND `by_alias`.`ipServiceProtocol` = `service_cache`.`ipServiceProtocol`
))
''',
)
group_by = (0, 2, 3) # cn, ipServicePort, ipServiceProtocol
group_columns = (1, ) # alias
def store(self, name, aliases, port, protocol):
self.con.execute('''
INSERT OR REPLACE INTO `service_cache`
VALUES
(?, ?, ?, ?)
''', (name, port, protocol, datetime.datetime.now()))
self.con.execute('''
DELETE FROM `service_alias_cache`
WHERE `ipServicePort` = ?
AND `ipServiceProtocol` = ?
''', (port, protocol))
self.con.executemany('''
INSERT INTO `service_alias_cache`
VALUES
(?, ?, ?)
''', ((port, protocol, alias) for alias in aliases))
class ServiceRequest(common.Request):
def write(self, name, aliases, port, protocol):
self.fp.write_string(name)
self.fp.write_stringlist(aliases)
self.fp.write_int32(port)
self.fp.write_string(protocol)
def convert(self, dn, attributes, parameters):
names = attributes['cn']
port = int(attributes['ipServicePort'][0])
protocols = attributes['ipServiceProtocol']
for protocol in protocols:
yield (names[0], names[1:], port, protocol)
class ServiceByNameRequest(ServiceRequest):
action = constants.NSLCD_ACTION_SERVICE_BYNAME
def read_parameters(self, fp):
name = fp.read_string()
protocol = fp.read_string()
if protocol:
return dict(cn=name, ipServiceProtocol=protocol)
else:
return dict(cn=name)
class ServiceByNumberRequest(ServiceRequest):
action = constants.NSLCD_ACTION_SERVICE_BYNUMBER
def read_parameters(self, fp):
number = fp.read_int32()
protocol = fp.read_string()
if protocol:
return dict(ipServicePort=number, ipServiceProtocol=protocol)
else:
return dict(ipServicePort=number)
class ServiceAllRequest(ServiceRequest):
action = constants.NSLCD_ACTION_SERVICE_ALL
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