0000-12-31 18:09:24 -05:50
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# Authors: Karl MacMillan <kmacmill@redhat.com>
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#
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# Copyright (C) 2007 Red Hat
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# see file 'COPYING' for use and warranty information
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; version 2 or later
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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import ConfigParser
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from optparse import OptionParser
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2007-12-11 09:58:39 -06:00
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import krbV
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import socket
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import ipa.dnsclient
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0000-12-31 18:09:24 -05:50
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class IPAConfigError(Exception):
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def __init__(self, msg=''):
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self.msg = msg
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Exception.__init__(self, msg)
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def __repr__(self):
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return self.msg
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__str__ = __repr__
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class IPAConfig:
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def __init__(self):
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self.default_realm = None
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self.default_server = None
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def get_realm(self):
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if self.default_realm:
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return self.default_realm
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else:
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raise IPAConfigError("no default realm")
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def get_server(self):
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if self.default_server:
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return self.default_server
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else:
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raise IPAConfigError("no default server")
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# Global library config
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config = IPAConfig()
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def __parse_config():
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p = ConfigParser.SafeConfigParser()
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p.read("/etc/ipa/ipa.conf")
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try:
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2007-12-11 09:58:39 -06:00
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if not config.default_realm:
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config.default_realm = p.get("defaults", "realm")
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if not config.default_server:
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config.default_server = p.get("defaults", "server")
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0000-12-31 18:09:24 -05:50
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except:
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pass
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2007-12-11 09:58:39 -06:00
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def __discover_config():
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try:
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if not config.default_realm:
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krbctx = krbV.default_context()
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config.default_realm = krbctx.default_realm
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if not config.default_realm:
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return False
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if not config.default_server:
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#try once with REALM -> domain
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name = "_ldap._tcp."+config.default_realm+"."
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rs = ipa.dnsclient.query(name, ipa.dnsclient.DNS_C_IN, ipa.dnsclient.DNS_T_SRV)
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rl = len(rs)
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#try cycling on domain components of FQDN
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if rl == 0:
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name = socket.getfqdn()
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while rl == 0:
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tok = name.find(".")
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if tok == -1:
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return False
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name = name[tok+1:]
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q = "_ldap._tcp." + name + "."
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rs = ipa.dnsclient.query(q, ipa.dnsclient.DNS_C_IN, ipa.dnsclient.DNS_T_SRV)
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rl = len(rs)
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for r in rs:
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if r.dns_type == ipa.dnsclient.DNS_T_SRV:
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rsrv = r.rdata.server.rstrip(".")
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# we take only the first one returned for now
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config.default_server = rsrv
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return True
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#if none found
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return False
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except:
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return False
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0000-12-31 18:09:24 -05:50
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def usage():
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return """ --realm\tset the IPA realm
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--server\tset the IPA server
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"""
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def __parse_args(args):
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# Can't use option parser because it doesn't easily leave
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# unknown arguments - creating our own seems simpler.
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#
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# should make this more robust and handle --realm=foo syntax
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out_args = []
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i = 0
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while i < len(args):
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if args[i] == "--realm":
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if i == len(args) - 1:
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raise IPAConfigError("missing argument to --realm")
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config.default_realm = args[i + 1]
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i = i + 2
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continue
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if args[i] == "--server":
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if i == len(args) - 1:
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raise IPAConfigError("missing argument to --server")
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config.default_server = args[i + 1]
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i = i + 2
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continue
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out_args.append(args[i])
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i = i + 1
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return out_args
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def init_config(args=None):
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out_args = None
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if args:
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out_args = __parse_args(args)
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2007-12-11 09:58:39 -06:00
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__discover_config()
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__parse_config()
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0000-12-31 18:09:24 -05:50
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if not config.default_realm:
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2007-12-11 09:58:39 -06:00
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raise IPAConfigError("realm not found, nor specified in config file or on command line")
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0000-12-31 18:09:24 -05:50
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if not config.default_server:
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2007-12-11 09:58:39 -06:00
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raise IPAConfigError("server not found, nor specified in config file or on command line")
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0000-12-31 18:09:24 -05:50
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if out_args:
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return out_args
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