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# Authors: Karl MacMillan <kmacmill@redhat.com>
#
# Copyright (C) 2007 Red Hat
# see file 'COPYING' for use and warranty information
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; version 2 only
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
import ConfigParser
from optparse import OptionParser, IndentedHelpFormatter
import krbV
import socket
import ipapython.dnsclient
import re
class IPAConfigError(Exception):
def __init__(self, msg=''):
self.msg = msg
Exception.__init__(self, msg)
def __repr__(self):
return self.msg
__str__ = __repr__
class IPAFormatter(IndentedHelpFormatter):
"""Our own optparse formatter that indents multiple lined usage string."""
def format_usage(self, usage):
usage_string = "Usage:"
spacing = " " * len(usage_string)
lines = usage.split("\n")
ret = "%s %s\n" % (usage_string, lines[0])
for line in lines[1:]:
ret += "%s %s\n" % (spacing, line)
return ret
def verify_args(parser, args, needed_args = None):
"""Verify that we have all positional arguments we need, if not, exit."""
if needed_args:
needed_list = needed_args.split(" ")
else:
needed_list = []
len_need = len(needed_list)
len_have = len(args)
if len_have > len_need:
parser.error("too many arguments")
elif len_have < len_need:
parser.error("no %s specified" % needed_list[len_have])
class IPAConfig:
def __init__(self):
self.default_realm = None
self.default_server = []
self.default_domain = None
def get_realm(self):
if self.default_realm:
return self.default_realm
else:
raise IPAConfigError("no default realm")
def get_server(self):
if len(self.default_server):
return self.default_server
else:
raise IPAConfigError("no default server")
def get_domain(self):
if self.default_domain:
return self.default_domain
else:
raise IPAConfigError("no default domain")
# Global library config
config = IPAConfig()
def __parse_config(discover_server = True):
p = ConfigParser.SafeConfigParser()
p.read("/etc/ipa/ipa.conf")
try:
if not config.default_realm:
config.default_realm = p.get("defaults", "realm")
except:
pass
if discover_server:
try:
s = p.get("defaults", "server")
config.default_server.extend(re.sub("\s+", "", s).split(','))
except:
pass
try:
if not config.default_domain:
config.default_domain = p.get("defaults", "domain")
except:
pass
def __discover_config(discover_server = True):
rl = 0
try:
if not config.default_realm:
krbctx = krbV.default_context()
config.default_realm = krbctx.default_realm
if not config.default_realm:
return False
if not config.default_domain:
#try once with REALM -> domain
dom_name = config.default_realm.lower()
name = "_ldap._tcp."+dom_name+"."
rs = ipapython.dnsclient.query(name, ipapython.dnsclient.DNS_C_IN, ipapython.dnsclient.DNS_T_SRV)
rl = len(rs)
if rl == 0:
#try cycling on domain components of FQDN
dom_name = socket.getfqdn()
while rl == 0:
tok = dom_name.find(".")
if tok == -1:
return False
dom_name = dom_name[tok+1:]
name = "_ldap._tcp." + dom_name + "."
rs = ipapython.dnsclient.query(name, ipapython.dnsclient.DNS_C_IN, ipapython.dnsclient.DNS_T_SRV)
rl = len(rs)
config.default_domain = dom_name
if discover_server:
if rl == 0:
name = "_ldap._tcp."+config.default_domain+"."
rs = ipapython.dnsclient.query(name, ipapython.dnsclient.DNS_C_IN, ipapython.dnsclient.DNS_T_SRV)
for r in rs:
if r.dns_type == ipapython.dnsclient.DNS_T_SRV:
rsrv = r.rdata.server.rstrip(".")
config.default_server.append(rsrv)
except:
pass
def add_standard_options(parser):
parser.add_option("--realm", dest="realm", help="Override default IPA realm")
parser.add_option("--server", dest="server", help="Override default IPA server")
parser.add_option("--domain", dest="domain", help="Override default IPA DNS domain")
def init_config(options=None):
if options:
config.default_realm = options.realm
config.default_domain = options.domain
if options.server:
config.default_server.extend(options.server.split(","))
if len(config.default_server):
discover_server = False
else:
discover_server = True
__parse_config(discover_server)
__discover_config(discover_server)
# make sure the server list only contains unique items
new_server = []
for server in config.default_server:
if server not in new_server:
new_server.append(server)
config.default_server = new_server
if not config.default_realm:
raise IPAConfigError("IPA realm not found in DNS, in the config file (/etc/ipa/ipa.conf) or on the command line.")
if not config.default_server:
raise IPAConfigError("IPA server not found in DNS, in the config file (/etc/ipa/ipa.conf) or on the command line.")
if not config.default_domain:
raise IPAConfigError("IPA domain not found in the config file (/etc/ipa/ipa.conf) or on the command line.")
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