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1 | #!/usr/bin/python | |
2 | ############################################################################### | |
3 | # # | |
4 | # ddns - A dynamic DNS client for IPFire # | |
5 | # Copyright (C) 2012 IPFire development team # | |
6 | # # | |
7 | # This program is free software: you can redistribute it and/or modify # | |
8 | # it under the terms of the GNU General Public License as published by # | |
9 | # the Free Software Foundation, either version 3 of the License, or # | |
10 | # (at your option) any later version. # | |
11 | # # | |
12 | # This program is distributed in the hope that it will be useful, # | |
13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of # | |
14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # | |
15 | # GNU General Public License for more details. # | |
16 | # # | |
17 | # You should have received a copy of the GNU General Public License # | |
18 | # along with this program. If not, see <http://www.gnu.org/licenses/>. # | |
19 | # # | |
20 | ############################################################################### | |
21 | ||
22 | import logging | |
23 | import logging.handlers | |
24 | import ConfigParser | |
25 | ||
26 | from i18n import _ | |
27 | ||
28 | logger = logging.getLogger("ddns.core") | |
29 | logger.propagate = 1 | |
30 | ||
31 | from .providers import * | |
32 | from .system import DDNSSystem | |
33 | ||
34 | # Setup the logger. | |
35 | def setup_logging(): | |
36 | rootlogger = logging.getLogger("ddns") | |
37 | rootlogger.setLevel(logging.DEBUG) | |
38 | ||
39 | # Setup a logger that logs to syslog. | |
40 | #handler = logging.handlers.SysLogHandler(address="/dev/log") | |
41 | ||
42 | handler = logging.StreamHandler() | |
43 | rootlogger.addHandler(handler) | |
44 | ||
45 | setup_logging() | |
46 | ||
47 | class DDNSCore(object): | |
48 | def __init__(self, debug=False): | |
49 | # In debug mode, enable debug logging. | |
50 | if debug: | |
51 | logger.setLevel(logging.DEBUG) | |
52 | ||
53 | # Initialize the settings array. | |
54 | self.settings = {} | |
55 | ||
56 | # Dict with all providers, that are supported. | |
57 | self.providers = {} | |
58 | self.register_all_providers() | |
59 | ||
60 | # List of configuration entries. | |
61 | self.entries = [] | |
62 | ||
63 | # Add the system class. | |
64 | self.system = DDNSSystem(self) | |
65 | ||
66 | def register_provider(self, provider): | |
67 | """ | |
68 | Registers a new provider. | |
69 | """ | |
70 | assert issubclass(provider, DDNSProvider) | |
71 | ||
72 | provider_handle = provider.INFO.get("handle") | |
73 | assert provider_handle | |
74 | ||
75 | assert not self.providers.has_key(provider_handle), \ | |
76 | "Provider '%s' has already been registered" % provider_handle | |
77 | ||
78 | provider_name = provider.INFO.get("name") | |
79 | assert provider_name | |
80 | ||
81 | logger.debug("Registered new provider: %s (%s)" % (provider_name, provider_handle)) | |
82 | self.providers[provider_handle] = provider | |
83 | ||
84 | def register_all_providers(self): | |
85 | """ | |
86 | Simply registers all providers. | |
87 | """ | |
88 | for provider in ( | |
89 | DDNSProviderDHS, | |
90 | DDNSProviderNOIP, | |
91 | DDNSProviderLightningWireLabs, | |
92 | DDNSProviderSelfhost, | |
93 | ): | |
94 | self.register_provider(provider) | |
95 | ||
96 | def load_configuration(self, filename): | |
97 | configs = ConfigParser.SafeConfigParser() | |
98 | configs.read([filename,]) | |
99 | ||
100 | # First apply all global configuration settings. | |
101 | for k, v in configs.items("config"): | |
102 | self.settings[k] = v | |
103 | ||
104 | for entry in configs.sections(): | |
105 | # Skip the special config section. | |
106 | if entry == "config": | |
107 | continue | |
108 | ||
109 | settings = {} | |
110 | for k, v in configs.items(entry): | |
111 | settings[k] = v | |
112 | settings["hostname"] = entry | |
113 | ||
114 | # Get the name of the provider. | |
115 | provider = settings.get("provider", None) | |
116 | if not provider: | |
117 | logger.warning("Entry '%s' lacks a provider setting. Skipping." % entry) | |
118 | continue | |
119 | ||
120 | # Try to find the provider with the wanted name. | |
121 | try: | |
122 | provider = self.providers[provider] | |
123 | except KeyError: | |
124 | logger.warning("Could not find provider '%s' for entry '%s'." % (provider, entry)) | |
125 | continue | |
126 | ||
127 | # Create an instance of the provider object with settings from the | |
128 | # configuration file. | |
129 | entry = provider(self, **settings) | |
130 | ||
131 | # Add new entry to list (if not already exists). | |
132 | if not entry in self.entries: | |
133 | self.entries.append(entry) | |
134 | ||
135 | def updateall(self): | |
136 | # If there are no entries, there is nothing to do. | |
137 | if not self.entries: | |
138 | logger.debug(_("Found no entries in the configuration file. Exiting.")) | |
139 | return | |
140 | ||
141 | # Update them all. | |
142 | for entry in self.entries: | |
143 | self.update(entry) | |
144 | ||
145 | def update(self, entry): | |
146 | try: | |
147 | entry() | |
148 | ||
149 | except DDNSUpdateError, e: | |
150 | logger.error(_("Dynamic DNS update for %(hostname)s (%(provider)s) failed:") % \ | |
151 | { "hostname" : entry.hostname, "provider" : entry.name }) | |
152 | logger.error(" %s" % e) | |
153 | ||
154 | except Exception, e: | |
155 | logger.error(_("Dynamic DNS update for %(hostname)s (%(provider)s) throwed an unhandled exception:") % \ | |
156 | { "hostname" : entry.hostname, "provider" : entry.name }) | |
157 | logger.error(" %s" % e) | |
158 | ||
159 | logger.info(_("Dynamic DNS update for %(hostname)s (%(provider)s) successful") % \ | |
160 | { "hostname" : entry.hostname, "provider" : entry.name }) |