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# vi: ts=4 expandtab
#
# Copyright (C) 2012 Canonical Ltd.
# Copyright (C) 2012, 2013 Hewlett-Packard Development Company, L.P.
# Copyright (C) 2012 Yahoo! Inc.
#
# Author: Scott Moser <scott.moser@canonical.com>
# Author: Juerg Haefliger <juerg.haefliger@hp.com>
# Author: Joshua Harlow <harlowja@yahoo-inc.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3, as
# published by the Free Software Foundation.
#
# 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/>.
#
from cloudinit.distros.parsers.resolv_conf import ResolvConf
from cloudinit.distros.parsers.sys_conf import SysConf
from cloudinit import log as logging
from cloudinit import util
LOG = logging.getLogger(__name__)
# This is a util function to translate Debian based distro interface blobs as
# given in /etc/network/interfaces to an equivalent format for distributions
# that use ifcfg-* style (Red Hat and SUSE).
# TODO(harlowja) remove when we have python-netcf active...
def translate_network(settings):
# Get the standard cmd, args from the ubuntu format
entries = []
for line in settings.splitlines():
line = line.strip()
if not line or line.startswith("#"):
continue
split_up = line.split(None, 1)
if len(split_up) <= 1:
continue
entries.append(split_up)
# Figure out where each iface section is
ifaces = []
consume = {}
for (cmd, args) in entries:
if cmd == 'iface':
if consume:
ifaces.append(consume)
consume = {}
consume[cmd] = args
else:
consume[cmd] = args
# Check if anything left over to consume
absorb = False
for (cmd, args) in consume.iteritems():
if cmd == 'iface':
absorb = True
if absorb:
ifaces.append(consume)
# Now translate
real_ifaces = {}
for info in ifaces:
if 'iface' not in info:
continue
iface_details = info['iface'].split(None)
dev_name = None
if len(iface_details) >= 1:
dev = iface_details[0].strip().lower()
if dev:
dev_name = dev
if not dev_name:
continue
iface_info = {}
if len(iface_details) >= 3:
proto_type = iface_details[2].strip().lower()
# Seems like this can be 'loopback' which we don't
# really care about
if proto_type in ['dhcp', 'static']:
iface_info['bootproto'] = proto_type
# These can just be copied over
for k in ['netmask', 'address', 'gateway', 'broadcast']:
if k in info:
val = info[k].strip().lower()
if val:
iface_info[k] = val
# Name server info provided??
if 'dns-nameservers' in info:
iface_info['dns-nameservers'] = info['dns-nameservers'].split()
# Name server search info provided??
if 'dns-search' in info:
iface_info['dns-search'] = info['dns-search'].split()
# Is any mac address spoofing going on??
if 'hwaddress' in info:
hw_info = info['hwaddress'].lower().strip()
hw_split = hw_info.split(None, 1)
if len(hw_split) == 2 and hw_split[0].startswith('ether'):
hw_addr = hw_split[1]
if hw_addr:
iface_info['hwaddress'] = hw_addr
real_ifaces[dev_name] = iface_info
# Check for those that should be started on boot via 'auto'
for (cmd, args) in entries:
if cmd == 'auto':
# Seems like auto can be like 'auto eth0 eth0:1' so just get the
# first part out as the device name
args = args.split(None)
if not args:
continue
dev_name = args[0].strip().lower()
if dev_name in real_ifaces:
real_ifaces[dev_name]['auto'] = True
return real_ifaces
# Helper function to update a RHEL/SUSE /etc/sysconfig/* file
def update_sysconfig_file(fn, adjustments, allow_empty=False):
if not adjustments:
return
(exists, contents) = read_sysconfig_file(fn)
updated_am = 0
for (k, v) in adjustments.items():
if v is None:
continue
v = str(v)
if len(v) == 0 and not allow_empty:
continue
contents[k] = v
updated_am += 1
if updated_am:
lines = [
str(contents),
]
if not exists:
lines.insert(0, util.make_header())
util.write_file(fn, "\n".join(lines) + "\n", 0644)
# Helper function to read a RHEL/SUSE /etc/sysconfig/* file
def read_sysconfig_file(fn):
exists = False
try:
contents = util.load_file(fn).splitlines()
exists = True
except IOError:
contents = []
return (exists, SysConf(contents))
# Helper function to update RHEL/SUSE /etc/resolv.conf
def update_resolve_conf_file(fn, dns_servers, search_servers):
try:
r_conf = ResolvConf(util.load_file(fn))
r_conf.parse()
except IOError:
util.logexc(LOG, "Failed at parsing %s reverting to an empty "
"instance", fn)
r_conf = ResolvConf('')
r_conf.parse()
if dns_servers:
for s in dns_servers:
try:
r_conf.add_nameserver(s)
except ValueError:
util.logexc(LOG, "Failed at adding nameserver %s", s)
if search_servers:
for s in search_servers:
try:
r_conf.add_search_domain(s)
except ValueError:
util.logexc(LOG, "Failed at adding search domain %s", s)
util.write_file(fn, str(r_conf), 0644)
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