1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
|
#!/usr/bin/python3
## system-config-printer
## Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2015 Red Hat, Inc.
## Authors:
## Tim Waugh <twaugh@redhat.com>
## 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; either version 2 of the License, or
## (at your option) any later version.
## 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
# config is generated from config.py.in by configure
import config
import dbus
import json
from debug import *
IPP_CLIENT_SERVICE = "ipp-client"
IPP_CLIENT_PORT = "631"
IPP_CLIENT_PROTOCOL = "udp"
IPP_SERVER_SERVICE = "ipp"
IPP_SERVER_PORT = "631"
IPP_SERVER_PROTOCOL = "tcp"
MDNS_SERVICE = "mdns"
MDNS_PORT = "5353"
MDNS_PROTOCOL = "udp"
SAMBA_CLIENT_SERVICE = "samba-client"
class FirewallD:
def __init__ (self):
try:
from firewall.client import FirewallClient
self._fw = FirewallClient ()
if not self._fw.connected:
debugprint ("FirewallD seems to be installed but not running")
self._fw = None
self._zone = None
self.running = False
return
zone_name = self._get_active_zone ()
if zone_name:
self._zone = self._fw.config().getZoneByName (zone_name)
else:
self._zone = None
self.running = True
debugprint ("Using /org/fedoraproject/FirewallD1")
except (ImportError, dbus.exceptions.DBusException):
self._fw = None
self._zone = None
self.running = False
def _get_active_zone (self):
zones = list(self._fw.getActiveZones().keys())
if not zones:
debugprint ("FirewallD: no changeable zone")
return None
elif len (zones) == 1:
# most probable case
return zones[0]
else:
# Do we need to handle the 'more active zones' case ?
# It's quite unlikely case because that would mean that more
# network connections are up and running and they are
# in different network zones at the same time.
debugprint ("FirewallD returned more zones, taking first one")
return zones[0]
def _get_fw_data (self, reply_handler=None, error_handler=None):
try:
debugprint ("%s in _get_fw_data: _fw_data is %s" %
(self, repr(self._fw_data.getServices())))
if self._fw_data:
debugprint ("Using cached firewall data")
if reply_handler:
reply_handler (self._fw_data)
except AttributeError:
try:
self._fw_data = self._zone.getSettings ()
debugprint ("Firewall data obtained")
if reply_handler:
reply_handler (self._fw_data)
except (dbus.exceptions.DBusException, AttributeError, ValueError) as e:
self._fw_data = None
debugprint ("Exception examining firewall")
if error_handler:
error_handler (e)
return self._fw_data
def read (self, reply_handler=None, error_handler=None):
if reply_handler:
self._get_fw_data (reply_handler,
error_handler)
else:
self._get_fw_data ()
def write (self):
try:
if self._zone:
self._zone.update (self._fw_data)
self._fw.reload ()
except dbus.exceptions.DBusException:
nonfatalException ()
def add_service (self, service):
if not self._get_fw_data ():
return
self._fw_data.addService (service)
def check_ipp_client_allowed (self):
if not self._get_fw_data ():
return True
return (IPP_CLIENT_SERVICE in self._fw_data.getServices () or
[IPP_CLIENT_PORT, IPP_CLIENT_PROTOCOL] in self._fw_data.getPorts ())
def check_ipp_server_allowed (self):
if not self._get_fw_data ():
return True
return (IPP_SERVER_SERVICE in self._fw_data.getServices () or
[IPP_SERVER_PORT, IPP_SERVER_PROTOCOL] in self._fw_data.getPorts ())
def check_samba_client_allowed (self):
if not self._get_fw_data ():
return True
return (SAMBA_CLIENT_SERVICE in self._fw_data.getServices ())
def check_mdns_allowed (self):
if not self._get_fw_data ():
return True
return (MDNS_SERVICE in self._fw_data.getServices () or
[MDNS_PORT, MDNS_PROTOCOL] in self._fw_data.getPorts ())
class SystemConfigFirewall:
DBUS_INTERFACE = "org.fedoraproject.Config.Firewall"
DBUS_PATH = "/org/fedoraproject/Config/Firewall"
def __init__(self):
try:
bus = dbus.SystemBus ()
obj = bus.get_object (self.DBUS_INTERFACE, self.DBUS_PATH)
self._fw = dbus.Interface (obj, self.DBUS_INTERFACE)
debugprint ("Using system-config-firewall")
except dbus.exceptions.DBusException:
debugprint ("No firewall ")
self._fw = None
self._fw_data = (None, None)
def _get_fw_data (self, reply_handler=None, error_handler=None):
try:
debugprint ("%s in _get_fw_data: _fw_data is %s" %
(self, repr(self._fw_data)))
if self._fw_data:
debugprint ("Using cached firewall data")
if reply_handler == None:
return self._fw_data
self._client_reply_handler (self._fw_data)
except AttributeError:
try:
if reply_handler:
self._fw.read (reply_handler=reply_handler,
error_handler=error_handler)
return
p = self._fw.read ()
self._fw_data = json.loads (p)
except (dbus.exceptions.DBusException, AttributeError, ValueError) as e:
self._fw_data = (None, None)
if error_handler:
debugprint ("Exception examining firewall")
self._client_error_handler (e)
return self._fw_data
def read (self, reply_handler=None, error_handler=None):
if reply_handler:
self._client_reply_handler = reply_handler
self._client_error_handler = error_handler
self._get_fw_data (reply_handler=self.reply_handler,
error_handler=self.error_handler)
else:
self._get_fw_data ()
def reply_handler (self, result):
try:
self._fw_data = json.loads (result)
except ValueError as e:
self.error_handler (e)
return
debugprint ("Firewall data obtained")
self._client_reply_handler (self._fw_data)
def error_handler (self, exc):
debugprint ("Exception fetching firewall data")
if self._client_error_handler:
self._client_error_handler (exc)
else:
debugprint ("Exception: %r" % exc)
def write (self):
try:
self._fw.write (json.dumps (self._fw_data[0]))
except:
pass
def _check_any_allowed (self, search):
(args, filename) = self._get_fw_data ()
if filename == None: return True
isect = set (search).intersection (set (args))
return len (isect) != 0
def add_service (self, service):
try:
(args, filename) = self._fw_data
except AttributeError:
(args, filename) = self._get_fw_data ()
if filename == None: return
args.append ("--service=" + service)
self._fw_data = (args, filename)
def check_ipp_client_allowed (self):
return self._check_any_allowed (set(["--port=%s:%s" %
(IPP_CLIENT_PORT, IPP_CLIENT_PROTOCOL),
"--service=" + IPP_CLIENT_SERVICE]))
def check_ipp_server_allowed (self):
return self._check_any_allowed (set(["--port=%s:%s" %
(IPP_SERVER_PORT, IPP_SERVER_PROTOCOL),
"--service=" + IPP_SERVER_SERVICE]))
def check_samba_client_allowed (self):
return self._check_any_allowed (set(["--service=" + SAMBA_CLIENT_SERVICE]))
def check_mdns_allowed (self):
return self._check_any_allowed (set(["--port=%s:%s" %
(MDNS_PORT, MDNS_PROTOCOL),
"--service=" + MDNS_SERVICE]))
|