164 lines
5.4 KiB
Python
164 lines
5.4 KiB
Python
# vi: ts=4 expandtab
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#
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# Copyright (C) 2012 Canonical Ltd.
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# Copyright (C) 2012, 2013 Hewlett-Packard Development Company, L.P.
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# Copyright (C) 2012 Yahoo! Inc.
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#
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# Author: Scott Moser <scott.moser@canonical.com>
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# Author: Juerg Haefliger <juerg.haefliger@hp.com>
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# Author: Joshua Harlow <harlowja@yahoo-inc.com>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 3, as
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# published by the Free Software Foundation.
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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, see <http://www.gnu.org/licenses/>.
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# This is a util function to translate debian based distro interface blobs as
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# given in /etc/network/interfaces to an *somewhat* agnostic format for
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# distributions that use other formats.
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#
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# TODO(harlowja) remove when we have python-netcf active...
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#
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# The format is the following:
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# {
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# <device-name>: {
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# # All optional (if not existent in original format)
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# "netmask": <ip>,
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# "broadcast": <ip>,
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# "gateway": <ip>,
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# "address": <ip>,
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# "bootproto": "static"|"dhcp",
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# "dns-search": <hostname>,
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# "hwaddress": <mac-address>,
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# "auto": True (or non-existent),
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# "dns-nameservers": [<ip/hostname>, ...],
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# }
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# }
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#
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# Things to note, comments are removed, if a ubuntu/debian interface is
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# marked as auto then only then first segment (?) is retained, ie
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# 'auto eth0 eth0:1' just marks eth0 as auto (not eth0:1).
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#
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# Example input:
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#
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# auto lo
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# iface lo inet loopback
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#
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# auto eth0
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# iface eth0 inet static
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# address 10.0.0.1
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# netmask 255.255.252.0
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# broadcast 10.0.0.255
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# gateway 10.0.0.2
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# dns-nameservers 98.0.0.1 98.0.0.2
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#
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# Example output:
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# {
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# "lo": {
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# "auto": true
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# },
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# "eth0": {
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# "auto": true,
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# "dns-nameservers": [
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# "98.0.0.1",
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# "98.0.0.2"
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# ],
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# "broadcast": "10.0.0.255",
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# "netmask": "255.255.252.0",
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# "bootproto": "static",
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# "address": "10.0.0.1",
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# "gateway": "10.0.0.2"
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# }
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# }
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def translate_network(settings):
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# Get the standard cmd, args from the ubuntu format
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entries = []
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for line in settings.splitlines():
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line = line.strip()
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if not line or line.startswith("#"):
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continue
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split_up = line.split(None, 1)
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if len(split_up) <= 1:
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continue
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entries.append(split_up)
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# Figure out where each iface section is
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ifaces = []
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consume = {}
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for (cmd, args) in entries:
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if cmd == 'iface':
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if consume:
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ifaces.append(consume)
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consume = {}
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consume[cmd] = args
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else:
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consume[cmd] = args
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# Check if anything left over to consume
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absorb = False
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for (cmd, args) in consume.iteritems():
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if cmd == 'iface':
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absorb = True
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if absorb:
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ifaces.append(consume)
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# Now translate
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real_ifaces = {}
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for info in ifaces:
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if 'iface' not in info:
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continue
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iface_details = info['iface'].split(None)
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dev_name = None
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if len(iface_details) >= 1:
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dev = iface_details[0].strip().lower()
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if dev:
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dev_name = dev
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if not dev_name:
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continue
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iface_info = {}
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if len(iface_details) >= 3:
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proto_type = iface_details[2].strip().lower()
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# Seems like this can be 'loopback' which we don't
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# really care about
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if proto_type in ['dhcp', 'static']:
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iface_info['bootproto'] = proto_type
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# These can just be copied over
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for k in ['netmask', 'address', 'gateway', 'broadcast']:
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if k in info:
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val = info[k].strip().lower()
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if val:
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iface_info[k] = val
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# Name server info provided??
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if 'dns-nameservers' in info:
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iface_info['dns-nameservers'] = info['dns-nameservers'].split()
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# Name server search info provided??
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if 'dns-search' in info:
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iface_info['dns-search'] = info['dns-search'].split()
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# Is any mac address spoofing going on??
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if 'hwaddress' in info:
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hw_info = info['hwaddress'].lower().strip()
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hw_split = hw_info.split(None, 1)
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if len(hw_split) == 2 and hw_split[0].startswith('ether'):
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hw_addr = hw_split[1]
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if hw_addr:
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iface_info['hwaddress'] = hw_addr
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real_ifaces[dev_name] = iface_info
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# Check for those that should be started on boot via 'auto'
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for (cmd, args) in entries:
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if cmd == 'auto':
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# Seems like auto can be like 'auto eth0 eth0:1' so just get the
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# first part out as the device name
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args = args.split(None)
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if not args:
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continue
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dev_name = args[0].strip().lower()
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if dev_name in real_ifaces:
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real_ifaces[dev_name]['auto'] = True
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return real_ifaces
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