summaryrefslogtreecommitdiffstats
path: root/network.py
blob: e9f6ad8d29cfcfe1a8263f39a15212bc75d62e1b (plain)
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
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
#
# network.py - network configuration install data
#
# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007  Red Hat, Inc.
#               2008, 2009
#
# 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, see <http://www.gnu.org/licenses/>.
#
# Author(s): Matt Wilson <ewt@redhat.com>
#            Erik Troan <ewt@redhat.com>
#            Mike Fulbright <msf@redhat.com>
#            Brent Fox <bfox@redhat.com>
#            David Cantrell <dcantrell@redhat.com>
#

import string
import shutil
import isys
import iutil
import socket
import struct
import os
import time
import dbus
from flags import flags
from simpleconfig import SimpleConfigFile

import gettext
_ = lambda x: gettext.ldgettext("anaconda", x)

import logging
log = logging.getLogger("anaconda")

class IPError(Exception):
    pass

class IPMissing(Exception):
    pass

def sanityCheckHostname(hostname):
    if len(hostname) < 1:
        return None

    if len(hostname) > 255:
        return _("Hostname must be 255 or fewer characters in length.")

    validStart = string.ascii_letters + string.digits
    validAll = validStart + ".-"

    if string.find(validStart, hostname[0]) == -1:
        return _("Hostname must start with a valid character in the ranges "
                 "'a-z', 'A-Z', or '0-9'")

    for i in range(1, len(hostname)):
        if string.find(validAll, hostname[i]) == -1:
            return _("Hostnames can only contain the characters 'a-z', 'A-Z', '0-9', '-', or '.'")

    return None

# Try to determine what the hostname should be for this system
def getDefaultHostname(anaconda):
    isys.resetResolv()

    hn = None
    bus = dbus.SystemBus()
    nm = bus.get_object(isys.NM_SERVICE, isys.NM_MANAGER_PATH)
    nm_props_iface = dbus.Interface(nm, isys.DBUS_PROPS_IFACE)

    active_connections = nm_props_iface.Get(isys.NM_MANAGER_IFACE, "ActiveConnections")

    # XXX: account for Ip6Config objects when NetworkManager supports them
    for connection in active_connections:
        active_connection = bus.get_object(isys.NM_SERVICE, connection)
        active_connection_props_iface = dbus.Interface(active_connection, isys.DBUS_PROPS_IFACE)
        devices = active_connection_props_iface.Get(isys.NM_MANAGER_IFACE, 'Devices')

        for device_path in devices:
            device = bus.get_object(isys.NM_SERVICE, device_path)
            device_props_iface = dbus.Interface(device, isys.DBUS_PROPS_IFACE)

            ip4_config_path = device_props_iface.Get(isys.NM_MANAGER_IFACE, 'Ip4Config')
            ip4_config_obj = bus.get_object(isys.NM_SERVICE, ip4_config_path)
            ip4_config_props = dbus.Interface(ip4_config_obj, isys.DBUS_PROPS_IFACE)

            # addresses (3-element list:  ipaddr, netmask, gateway)
            addrs = ip4_config_props.Get(isys.NM_MANAGER_IFACE, "Addresses")[0]
            try:
                tmp = struct.pack('I', addrs[0])
                ipaddr = socket.inet_ntop(socket.AF_INET, tmp)
                hinfo = socket.gethostbyaddr(ipaddr)

                if len(hinfo) == 3:
                    hn = hinfo[0]
                else:
                    continue
            except:
                continue

    if hn and hn != 'localhost' and hn != 'localhost.localdomain':
        return hn

    try:
        hn = anaconda.id.network.hostname
    except:
        hn = None

    if not hn or hn == '(none)' or hn == 'localhost' or hn == 'localhost.localdomain':
        hn = socket.gethostname()

    if not hn or hn == '(none)' or hn == 'localhost':
        hn = 'localhost.localdomain'

    return hn

# return if the device is of a type that requires a ptpaddr to be specified
def isPtpDev(devname):
    if (devname.startswith("ctc") or devname.startswith("iucv")):
        return True
    return False

def _anyUsing(method):
    # method names that NetworkManager might use
    if method == 'auto':
        methods = (method, 'dhcp')
    else:
        methods = (method)

    try:
        bus = dbus.SystemBus()
        nm = bus.get_object(isys.NM_SERVICE, isys.NM_MANAGER_PATH)
        nm_props_iface = dbus.Interface(nm, isys.DBUS_PROPS_IFACE)
        active_connections = nm_props_iface.Get(isys.NM_MANAGER_IFACE, "ActiveConnections")

        for path in active_connections:
            active = bus.get_object(isys.NM_SERVICE, path)
            active_props_iface = dbus.Interface(active, isys.DBUS_PROPS_IFACE)

            active_service_name = active_props_iface.Get(isys.NM_ACTIVE_CONNECTION_IFACE, "ServiceName")
            active_path = active_props_iface.Get(isys.NM_ACTIVE_CONNECTION_IFACE, "Connection")

            connection = bus.get_object(active_service_name, active_path)
            connection_iface = dbus.Interface(connection, isys.NM_CONNECTION_IFACE)
            settings = connection_iface.GetSettings()

            # XXX: add support for Ip6Config when it appears
            ip4_setting = settings['ipv4']
            if not ip4_setting or not ip4_setting['method'] or ip4_setting['method'] in methods:
                return True

            return False
    except:
        return False

# determine whether any active at boot devices are using dhcp or dhcpv6
def anyUsingDHCP():
    return _anyUsing('auto')

# determine whether any active at boot devices are using static IP config
def anyUsingStatic():
    return _anyUsing('manual')

# sanity check an IP string.
def sanityCheckIPString(ip_string):
    if ip_string.strip() == "":
        raise IPMissing, _("IP address is missing.")

    if ip_string.find(':') == -1 and ip_string.find('.') > 0:
        family = socket.AF_INET
        errstr = _("IPv4 addresses must contain four numbers between 0 and 255, separated by periods.")
    elif ip_string.find(':') > 0 and ip_string.find('.') == -1:
        family = socket.AF_INET6
        errstr = _("'%s' is not a valid IPv6 address.") % ip_string
    else:
        raise IPError, _("'%s' is an invalid IP address.") % ip_string

    try:
        socket.inet_pton(family, ip_string)
    except socket.error:
        raise IPError, errstr

def hasActiveNetDev():
    try:
        bus = dbus.SystemBus()
        nm = bus.get_object(isys.NM_SERVICE, isys.NM_MANAGER_PATH)
        props = dbus.Interface(nm, isys.DBUS_PROPS_IFACE)
        state = props.Get(isys.NM_SERVICE, "State")

        if int(state) == isys.NM_STATE_CONNECTED:
            return True
        else:
            return False
    except:
        return False

# Return a list of device names (e.g., eth0) for all active devices.
# Returning a list here even though we will almost always have one
# device.  NM uses lists throughout its D-Bus communication, so trying
# to follow suit here.  Also, if this uses a list now, we can think
# about multihomed hosts during installation later.
def getActiveNetDevs():
    active_devs = set()

    bus = dbus.SystemBus()
    nm = bus.get_object(isys.NM_SERVICE, isys.NM_MANAGER_PATH)
    nm_props_iface = dbus.Interface(nm, isys.DBUS_PROPS_IFACE)

    active_connections = nm_props_iface.Get(isys.NM_MANAGER_IFACE, "ActiveConnections")

    for connection in active_connections:
        active_connection = bus.get_object(isys.NM_SERVICE, connection)
        active_connection_props_iface = dbus.Interface(active_connection, isys.DBUS_PROPS_IFACE)
        devices = active_connection_props_iface.Get(isys.NM_MANAGER_IFACE, 'Devices')

        for device_path in devices:
            device = bus.get_object(isys.NM_SERVICE, device_path)
            device_props_iface = dbus.Interface(device, isys.DBUS_PROPS_IFACE)

            interface_name = device_props_iface.Get(isys.NM_MANAGER_IFACE, 'Interface')
            active_devs.add(interface_name)

    ret = list(active_devs)
    ret.sort()
    return ret

class NetworkDevice(SimpleConfigFile):
    def __str__(self):
        s = ""
        s = s + "DEVICE=" + self.info["DEVICE"] + "\n"
        keys = self.info.keys()
        keys.sort()
        keys.remove("DEVICE")
        if "DESC" in keys:
            keys.remove("DESC")
        if "KEY" in keys:
            keys.remove("KEY")

        for key in keys:
            if (key == 'NAME') or \
               (key == 'NM_CONTROLLED' and not flags.livecdInstall):
                continue
            # make sure we include autoneg in the ethtool line
            elif key == 'ETHTOOL_OPTS' and self.info[key].find("autoneg")== -1:
                s = s + key + """="autoneg off %s"\n""" % (self.info[key])
            elif self.info[key] is not None:
                s = s + key + "=" + self.info[key] + "\n"

        return s

    def __init__(self, dev):
        self.info = { "DEVICE" : dev }
        if dev.startswith('ctc'):
            self.info["TYPE"] = "CTC"
        elif dev.startswith('iucv'):
            self.info["TYPE"] = "IUCV"

class Network:
    def __init__(self):
        self.netdevices = {}
        self.ksdevice = None
        self.domains = []
        self.hostname = socket.gethostname()
        self.overrideDHCPhostname = False

        # populate self.netdevices
        devhash = isys.getDeviceProperties(dev=None)
        for dev in devhash.keys():
            self.netdevices[dev] = NetworkDevice(dev)
            ifcfg_contents = self.readIfcfgContents(dev)

            # if NM_CONTROLLED is set to yes, we read in settings from
            # NetworkManager first, then fill in the gaps with the data
            # from the ifcfg file
            useNetworkManager = False
            if ifcfg_contents.has_key('NM_CONTROLLED') and \
               not ifcfg_contents['NM_CONTROLLED'].lower() == 'no':
                useNetworkManager = True

            # this interface is managed by NetworkManager, so read from
            # NetworkManager first
            if useNetworkManager:
                props = devhash[dev]

                if isys.isDeviceDHCP(dev):
                    self.netdevices[dev].set(('BOOTPROTO', 'dhcp'))
                else:
                    self.netdevices[dev].unset('BOOTPROTO')
                    bus = dbus.SystemBus()
                    config_path = props.Get(isys.NM_MANAGER_IFACE, 'Ip4Config')
                    config = bus.get_object(isys.NM_SERVICE, config_path)
                    config_props = dbus.Interface(config, isys.DBUS_PROPS_IFACE)

                    # addresses (3-element list:  ipaddr, netmask, gateway)
                    addrs = config_props.Get(isys.NM_MANAGER_IFACE, 'Addresses')[0]
                    try:
                        tmp = struct.pack('I', addrs[0])
                        ipaddr = socket.inet_ntop(socket.AF_INET, tmp)
                        self.netdevices[dev].set(('IPADDR', ipaddr))
                    except:
                        pass

                    try:
                        tmp = struct.pack('I', addrs[1])
                        netmask = socket.inet_ntop(socket.AF_INET, tmp)
                        self.netdevices[dev].set(('NETMASK', netmask))
                    except:
                        pass

                    try:
                        tmp = struct.pack('I', addrs[2])
                        gateway = socket.inet_ntop(socket.AF_INET, tmp)
                        self.netdevices[dev].set(('GATEWAY', gateway))
                    except:
                        pass

                self.hostname = socket.gethostname()

            # read in remaining settings from ifcfg file
            for key in ifcfg_contents.keys():
                if key == 'GATEWAY':
                    self.netdevices[dev].set((key, ifcfg_contents[key]))
                elif key == 'DOMAIN':
                    self.domains.append(ifcfg_contents[key])
                elif key == 'HOSTNAME':
                    self.hostname = ifcfg_contents[key]
                elif self.netdevices[dev].get(key) == '':
                    self.netdevices[dev].set((key, ifcfg_contents[key]))

        # now initialize remaining devices
        # XXX we just throw return away, the method initialize a
        # object member so we dont need to
        available_devices = self.available()

        if len(available_devices) > 0:
            # set first device to start up onboot
            oneactive = 0
            for dev in available_devices.keys():
                try:
                    if available_devices[dev].get("ONBOOT") == "yes":
                        oneactive = 1
                        break
                except:
                    continue

    def readIfcfgContents(self, dev):
        ifcfg = "/etc/sysconfig/network-scripts/ifcfg-%s" % (dev,)
        contents = {}

        try:
            f = open(ifcfg, "r")
            lines = f.readlines()
            f.close()

            for line in lines:
                line = line.strip()
                if line.startswith('#') or line == '':
                    continue

                var = string.splitfields(line, '=')
                if len(var) == 2:
                    var[1] = var[1].replace('"', '')
                    contents[var[0]] = string.strip(var[1])
        except:
            return {}

        return contents

    def getDevice(self, device):
        return self.netdevices[device]

    def available(self):
        ksdevice = None
        if flags.cmdline.has_key('ksdevice'):
            ksdevice = flags.cmdline['ksdevice']

        for dev in isys.getDeviceProperties().keys():
            if not self.netdevices.has_key(dev):
                self.netdevices[dev] = NetworkDevice(dev)

            hwaddr = isys.getMacAddress(dev)

            self.netdevices[dev].set(('HWADDR', hwaddr))
            self.netdevices[dev].set(('DESC', isys.getNetDevDesc(dev)))

            if not ksdevice:
                continue

            if ksdevice == 'link' and isys.getLinkStatus(dev):
                self.ksdevice = dev
            elif ksdevice == dev:
                self.ksdevice = dev
            elif ksdevice.find(':') != -1:
                if ksdevice.upper() == hwaddr:
                    self.ksdevice = dev

        return self.netdevices

    def getKSDevice(self):
        if self.ksdevice is None:
            return None

        try:
            return self.netdevices[self.ksdevice]
        except:
            return None

    def setHostname(self, hn):
        self.hostname = hn

    def setDNS(self, ns, device):
        dns = ns.split(',')
        i = 1
        for addr in dns:
            addr = addr.strip()
            dnslabel = "DNS%d" % (i,)
            self.netdevices[device].set((dnslabel, addr))
            i += 1

    def setGateway(self, gw, device):
        self.netdevices[device].set(('GATEWAY', gw))

    def lookupHostname(self):
        # can't look things up if they don't exist!
        if not self.hostname or self.hostname == "localhost.localdomain":
            return None

        if not hasActiveNetDev():
            log.warning("no network devices were available to look up host name")
            return None

        try:
            (family, socktype, proto, canonname, sockaddr) = \
                socket.getaddrinfo(self.hostname, None, socket.AF_INET)[0]
            (ip, port) = sockaddr
        except:
            try:
                (family, socktype, proto, canonname, sockaddr) = \
                    socket.getaddrinfo(self.hostname, None, socket.AF_INET6)[0]
                (ip, port, flowinfo, scopeid) = sockaddr
            except:
                return None

        return ip

    def writeKS(self, f):
        devNames = self.netdevices.keys()
        devNames.sort()

        if len(devNames) == 0:
            return

        for devName in devNames:
            dev = self.netdevices[devName]

            if dev.get('bootproto').lower() == 'dhcp' or dev.get('ipaddr'):
                f.write("network --device %s" % dev.get('device'))

                if dev.get('MTU') and dev.get('MTU') != 0:
                    f.write(" --mtu=%s" % dev.get('MTU'))

                onboot = dev.get("onboot")
                if onboot and onboot == "no":
                    f.write(" --onboot no")
                if dev.get('bootproto').lower() == 'dhcp':
                    f.write(" --bootproto dhcp")
                    if dev.get('dhcpclass'):
                        f.write(" --dhcpclass %s" % dev.get('dhcpclass'))
                    if self.overrideDHCPhostname:
                        if (self.hostname and
                            self.hostname != "localhost.localdomain"):
                            f.write(" --hostname %s" % self.hostname)
                else:
                    f.write(" --bootproto static --ip %s --netmask %s" % 
                       (dev.get('ipaddr'), dev.get('netmask')))

                    if dev.get('GATEWAY'):
                        f.write(" --gateway %s" % (dev.get('GATEWAY'),))

                    dnsline = ''
                    for key in dev.info.keys():
                        if key.upper().startswith('DNS'):
                            if dnsline == '':
                                dnsline = dev.get(key)
                            else:
                                dnsline += "," + dev.get(key)

                    if dnsline != '':
                        f.write(" --nameserver %s" % (dnsline,))

                    if (self.hostname and
                        self.hostname != "localhost.localdomain"):
                        f.write(" --hostname %s" % self.hostname)

                f.write("\n");

    def hasNameServers(self, hash):
        if hash.keys() == []:
            return False

        for key in hash.keys():
            if key.upper().startswith('DNS'):
                return True

        return False

    def write(self, instPath='', anaconda=None, devices=None):

        if devices is None:
            devices = self.netdevices.values()

        if len(devices) == 0:
            return

        sysconfig = "%s/etc/sysconfig" % (instPath,)
        netscripts = "%s/network-scripts" % (sysconfig,)
        destnetwork = "%s/network" % (sysconfig,)

        if not os.path.isdir(netscripts):
            iutil.mkdirChain(netscripts)

        # /etc/sysconfig/network-scripts/ifcfg-*
        for dev in devices:
            device = dev.get('DEVICE')

            cfgfile = "%s/ifcfg-%s" % (netscripts, device,)
            if (instPath) and (os.path.isfile(cfgfile)):
                continue

            bootproto = dev.get('BOOTPROTO').lower()
            ipv6addr = dev.get('IPV6ADDR').lower()
            ipv6prefix = dev.get('IPV6PREFIX').lower()
            ipv6autoconf = dev.get('IPV6_AUTOCONF').lower()
            dhcpv6c = dev.get('DHCPV6C').lower()

            newifcfg = "/tmp/ifcfg-%s.new" % (device,)
            f = open(newifcfg, "w")
            if len(dev.get("DESC")) > 0:
                f.write("# %s\n" % (dev.get("DESC"),))

            # if bootproto is dhcp, unset any static settings (#218489)
            # *but* don't unset if either IPv4 or IPv6 is manual (#433290)
            if bootproto == 'dhcp':
                dev.unset('IPADDR')
                dev.unset('NETMASK')
                dev.unset('GATEWAY')

            # handle IPv6 settings correctly for the ifcfg file
            dev.unset('IPV6ADDR')
            dev.unset('IPV6PREFIX')

            if ipv6addr == 'dhcp':
                dev.set(('IPV6INIT', 'yes'))
                dev.set(('DHCPV6C', 'yes'))
            elif ipv6addr != '' and ipv6addr is not None:
                dev.set(('IPV6INIT', 'yes'))

                if ipv6prefix != '' and ipv6prefix is not None:
                    dev.set(('IPV6ADDR', ipv6addr + '/' + ipv6prefix))
                else:
                    dev.set(('IPV6ADDR', ipv6addr))

            if dev.get('IPV6_AUTOCONF').lower() == 'yes':
                dev.set(('IPV6INIT', 'yes'))

            f.write(str(dev))

            # write out the hostname as DHCP_HOSTNAME if given (#81613)
            if (bootproto == 'dhcp' and self.hostname and
                self.overrideDHCPhostname):
                f.write("DHCP_HOSTNAME=%s\n" %(self.hostname,))

            if dev.get('MTU') and dev.get('MTU') != 0:
                f.write("MTU=%s\n" % dev.get('MTU'))

            # tell NetworkManager not to touch any interfaces used during
            # installation when / is on a network backed device.
            if anaconda is not None:
                import storage
                rootdev = anaconda.id.storage.rootDevice
                # FIXME: use d.host_address to only add "NM_CONTROLLED=no"
                # for interfaces actually used enroute to the device
                for d in anaconda.id.storage.devices:
                    if isinstance(d, storage.devices.NetworkStorageDevice) and\
                       (rootdev.dependsOn(d) or d.nic == device):
                        f.write("NM_CONTROLLED=no\n")
                        break

            f.close()
            os.chmod(newifcfg, 0644)

            # move the new ifcfg in place
            destcfg = "%s/ifcfg-%s" % (netscripts, device,)
            try:
                os.remove(destcfg)
            except OSError as e:
                if e.errno != 2:
                    raise
            shutil.move(newifcfg, destcfg)

            # XXX: is this necessary with NetworkManager?
            # handle the keys* files if we have those
            if dev.get("KEY"):
                cfgfile = "%s/keys-%s" % (netscripts, device,)
                if not instPath == '' and os.path.isfile(cfgfile):
                    continue

                newkey = "%s/keys-%s.new" % (netscripts, device,)
                f = open(newkey, "w")
                f.write("KEY=%s\n" % (dev.get('KEY'),))
                f.close()
                os.chmod(newkey, 0600)

                destkey = "%s/keys-%s" % (netscripts, device,)
                shutil.move(newkey, destkey)

            # /etc/dhclient-DEVICE.conf
            dhclientconf = '/etc/dhclient-' + device + '.conf'
            if os.path.isfile(dhclientconf):
                destdhclientconf = '%s%s' % (instPath, dhclientconf,)
                try:
                    shutil.copy(dhclientconf, destdhclientconf)
                except:
                    log.warning("unable to copy %s to target system" % (dhclientconf,))

        # /etc/sysconfig/network
        if (not instPath) or (not os.path.isfile(destnetwork)) or flags.livecdInstall:
            newnetwork = "%s.new" % (destnetwork,)

            f = open(newnetwork, "w")
            f.write("NETWORKING=yes\n")
            f.write("HOSTNAME=")

            # use instclass hostname if set(kickstart) to override
            if self.hostname:
                f.write(self.hostname + "\n")
            else:
                f.write("localhost.localdomain\n")

            if dev.get('GATEWAY'):
                f.write("GATEWAY=%s\n" % (dev.get('GATEWAY'),))

            if dev.get('IPV6_DEFAULTGW'):
                f.write("IPV6_DEFAULTGW=%s\n" % (dev.get('IPV6_DEFAULTGW'),))

            f.close()
            shutil.move(newnetwork, destnetwork)

        # If the hostname was not looked up, but typed in by the user,
        # domain might not be computed, so do it now.
        domainname = None
        if "." in self.hostname:
            fqdn = self.hostname
        else:
            fqdn = socket.getfqdn(self.hostname)

        if fqdn in [ "localhost.localdomain", "localhost",
                     "localhost6.localdomain6", "localhost6",
                     self.hostname ] or "." not in fqdn:
            fqdn = None

        if fqdn:
            domainname = fqdn.split('.', 1)[1]
            if domainname in [ "localdomain", "localdomain6" ]:
                domainname = None
        else:
            domainname = None

        if self.domains == ["localdomain"] or not self.domains:
            if domainname:
                self.domains = [domainname]

        # /etc/hosts
        # update lines for 127.0.0.1 and ::1 with hostname if the file exists
        if instPath and os.path.isfile(instPath + "/etc/hosts"):
            of = open(instPath + "/etc/hosts", "r")
            updatedlines = []
            update = False
            for line in of:
                line = line.strip()
                if line.startswith('127.0.0.1') or line.startswith('::1'):
                    if self.hostname not in line.split():
                        line += " %s" % self.hostname
                        update = True
                updatedlines.append(line)
            of.close()

            if update:
                nf = open(instPath + "/etc/hosts", "w")
                upd_comment = "# hostname %s added to /etc/hosts by anaconda\n" % self.hostname
                nf.write(upd_comment + '\n'.join(updatedlines) + '\n')
                nf.close()
                log.info("/etc/hosts updated with hostname %s" % self.hostname) 


        # /etc/resolv.conf
        if (not instPath) or (not os.path.isfile(instPath + '/etc/resolv.conf')) or flags.livecdInstall:
            if os.path.isfile('/etc/resolv.conf') and instPath != '':
                destresolv = "%s/etc/resolv.conf" % (instPath,)
                shutil.copy('/etc/resolv.conf', destresolv)
            elif (self.domains != ['localdomain'] and self.domains) or \
                self.hasNameServers(dev.info):
                resolv = "%s/etc/resolv.conf" % (instPath,)

                f = open(resolv, "w")

                if self.domains != ['localdomain'] and self.domains:
                    f.write("search %s\n" % (string.joinfields(self.domains, ' '),))

                for key in dev.info.keys():
                    if key.upper().startswith('DNS'):
                        f.write("nameserver %s\n" % (dev.get(key),))

                f.close()

        # /etc/udev/rules.d/70-persistent-net.rules
        rules = instPath + "/etc/udev/rules.d/70-persistent-net.rules"
        if (not instPath) or (not os.path.isfile(rules)) or flags.livecdInstall:
            if not os.path.isdir("%s/etc/udev/rules.d" %(instPath,)):
                iutil.mkdirChain("%s/etc/udev/rules.d" %(instPath,))

            f = open(rules, "w")
            f.write("""
# This file was automatically generated by the /lib/udev/write_net_rules
# program run by the persistent-net-generator.rules rules file.
#
# You can modify it, as long as you keep each rule on a single line.

""")
            for dev in self.netdevices.values():
                addr = dev.get("HWADDR")
                if not addr:
                    continue
                devname = dev.get("DEVICE")
                basename = devname
                while basename != "" and basename[-1] in string.digits:
                    basename = basename[:-1]

                # rules are case senstive for address. Lame.
                addr = addr.lower()

                s = ""
                if len(dev.get("DESC")) > 0:
                    s = "# %s (rule written by anaconda)\n" % (dev.get("DESC"),)
                else:
                    s = "# %s (rule written by anaconda)\n" % (devname,)
                s = s + 'SUBSYSTEM==\"net\", ACTION==\"add\", DRIVERS=="?*", ATTR{address}=="%s", ATTR{type}=="1", KERNEL=="%s*", NAME="%s"\n' % (addr, basename, devname)
                f.write(s)

            f.close()

    # write out current configuration state and wait for NetworkManager
    # to bring the device up, watch NM state and return to the caller
    # once we have a state
    def bringUp(self, devices=None):
        self.write(devices=devices)

        bus = dbus.SystemBus()
        nm = bus.get_object(isys.NM_SERVICE, isys.NM_MANAGER_PATH)
        props = dbus.Interface(nm, isys.DBUS_PROPS_IFACE)

        i = 0
        while i < 45:
            state = props.Get(isys.NM_SERVICE, "State")
            if int(state) == isys.NM_STATE_CONNECTED:
                isys.resetResolv()
                return True
            i += 1
            time.sleep(1)

        state = props.Get(isys.NM_SERVICE, "State")
        if int(state) == isys.NM_STATE_CONNECTED:
            isys.resetResolv()
            return True

        return False

    # get a kernel cmdline string for dracut needed for access to host host
    def dracutSetupString(self, networkStorageDevice):
        netargs=""

        if networkStorageDevice.nic:
            # Storage bound to a specific nic (ie FCoE)
            nic = networkStorageDevice.nic
        else:
            # Storage bound through ip, find out which interface leads to host
            host = networkStorageDevice.host_address
            route = iutil.execWithCapture("ip", [ "route", "get", "to", host ])
            if not route:
                log.error("Could net get interface for route to %s" % host)
                return ""

            routeInfo = route.split()
            if routeInfo[0] != host or len(routeInfo) < 5:
                log.error('Unexpected "ip route get to %s" reply: %s' %
                          (host, routeInfo))
                return ""

            nic = routeInfo[2]

        if nic not in self.netdevices.keys():
            log.error('Unknown network interface: %s' % nic)
            return ""

        dev = self.netdevices[nic]

        if networkStorageDevice.host_address:
            if dev.get('bootproto').lower() == 'dhcp':
                netargs += "ip=%s:dhcp" % nic
            else:
                if dev.get('GATEWAY'):
                    gateway = dev.get('GATEWAY')
                else:
                    gateway = ""

                if self.hostname:
                    hostname = self.hostname
                else:
                    hostname = ""

                netargs += "ip=%s::%s:%s:%s:%s:none" % (dev.get('ipaddr'),
                           gateway, dev.get('netmask'), hostname, nic)

        hwaddr = dev.get("HWADDR")
        if hwaddr:
            if netargs != "":
                netargs += " "

            netargs += "ifname=%s:%s" % (nic, hwaddr.lower())

        return netargs