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# Copyright 2015 Canonical, Ltd.
#
# 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, version 3.
#
# 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/>.
import enum
import ipaddress
import logging
import yaml
from socket import AF_INET, AF_INET6
from subiquitycore.gettext38 import pgettext
from subiquitycore import netplan
NETDEV_IGNORED_IFACE_TYPES = [
'lo', 'bridge', 'tun', 'tap', 'dummy', 'sit', 'can', '???'
]
NETDEV_ALLOWED_VIRTUAL_IFACE_TYPES = ['vlan', 'bond']
log = logging.getLogger('subiquitycore.models.network')
def addr_version(ip):
return ipaddress.ip_interface(ip).version
class NetDevAction(enum.Enum):
# Information about a network interface
INFO = pgettext("NetDevAction", "Info")
EDIT_WLAN = pgettext("NetDevAction", "Edit Wifi")
EDIT_IPV4 = pgettext("NetDevAction", "Edit IPv4")
EDIT_IPV6 = pgettext("NetDevAction", "Edit IPv6")
EDIT_BOND = pgettext("NetDevAction", "Edit bond")
ADD_VLAN = pgettext("NetDevAction", "Add a VLAN tag")
DELETE = pgettext("NetDevAction", "Delete")
def str(self):
return pgettext(type(self).__name__, self.value)
class BondParameters:
# Just a place to hang various data about how bonds can be
# configured.
modes = [
'balance-rr',
'active-backup',
'balance-xor',
'broadcast',
'802.3ad',
'balance-tlb',
'balance-alb',
]
supports_xmit_hash_policy = {
'balance-xor',
'802.3ad',
'balance-tlb',
}
xmit_hash_policies = [
'layer2',
'layer2+3',
'layer3+4',
'encap2+3',
'encap3+4',
]
supports_lacp_rate = {
'802.3ad',
}
lacp_rates = [
'slow',
'fast',
]
class NetworkDev(object):
def __init__(self, model, name, typ):
self._model = model
self._name = name
self.type = typ
self.config = {}
self.info = None
self.disabled_reason = None
self.dhcp_events = {}
self._dhcp_state = {
4: None,
6: None,
}
def dhcp_addresses(self):
r = {4: [], 6: []}
if self.info is not None:
for a in self.info.addresses.values():
if a.family == AF_INET:
v = 4
elif a.family == AF_INET6:
v = 6
else:
continue
if a.source == 'dhcp':
r[v].append(str(a.address))
return r
def dhcp_enabled(self, version):
if self.config is None:
return False
else:
return self.config.get('dhcp{v}'.format(v=version), False)
def dhcp_state(self, version):
if not self.config.get('dhcp{v}'.format(v=version), False):
return None
return self._dhcp_state[version]
def set_dhcp_state(self, version, state):
self._dhcp_state[version] = state
@property
def name(self):
return self._name
@name.setter
def name(self, new_name):
# If a virtual device that already exists is renamed, we need
# to create a dummy NetworkDev so that the existing virtual
# device is actually deleted when the config is applied.
if new_name != self.name and self.is_virtual and self.info is not None:
if new_name in self.model.devices_by_name:
raise RuntimeError(
"renaming {old_name} over {new_name}".format(
old_name=self.name, new_name=new_name))
self._model.devices_by_name[new_name] = self
dead_device = self._model.devices_by_name[self.name] = NetworkDev(
self.name, self.type)
dead_device.config = None
dead_device.info = self.info
self.info = None
self._name = new_name
def supports_action(self, action):
return getattr(self, "_supports_" + action.name)
@property
def configured_ssid(self):
for ssid, settings in self.config.get('access-points', {}).items():
psk = settings.get('password')
return ssid, psk
return None, None
def set_ssid_psk(self, ssid, psk):
aps = self.config.setdefault('access-points', {})
aps.clear()
if ssid is not None:
aps[ssid] = {}
if psk is not None:
aps[ssid]['password'] = psk
@property
def ifindex(self):
if self.info is not None:
return self.info.ifindex
else:
return None
@property
def is_virtual(self):
return self.type in NETDEV_ALLOWED_VIRTUAL_IFACE_TYPES
@property
def is_bond_slave(self):
for dev in self._model.get_all_netdevs():
if dev.type == "bond":
if self.name in dev.config.get('interfaces', []):
return True
return False
@property
def is_used(self):
for dev in self._model.get_all_netdevs():
if dev.type == "bond":
if self.name in dev.config.get('interfaces', []):
return True
if dev.type == "vlan":
if self.name == dev.config.get('link'):
return True
return False
@property
def actual_global_ip_addresses(self):
return [addr.ip for _, addr in sorted(self.info.addresses.items())
if addr.scope == "global"]
_supports_INFO = True
_supports_EDIT_WLAN = property(lambda self: self.type == "wlan")
_supports_EDIT_IPV4 = True
_supports_EDIT_IPV6 = True
_supports_EDIT_BOND = property(lambda self: self.type == "bond")
_supports_ADD_VLAN = property(
lambda self: self.type != "vlan" and not self.is_bond_slave)
_supports_DELETE = property(
lambda self: self.is_virtual and not self.is_used)
def remove_ip_networks_for_version(self, version):
self.config.pop('dhcp{v}'.format(v=version), None)
self.config.pop('gateway{v}'.format(v=version), None)
addrs = []
for ip in self.config.get('addresses', []):
if addr_version(ip) != version:
addrs.append(ip)
if addrs:
self.config['addresses'] = addrs
else:
self.config.pop('addresses', None)
def add_network(self, version, network):
# result = {
# 'network': self.subnet_input.value,
# 'address': self.address_input.value,
# 'gateway': self.gateway_input.value,
# 'nameserver': [nameservers],
# 'searchdomains': [searchdomains],
# }
address = network['address'].split('/')[0]
address += '/' + network['network'].split('/')[1]
self.config.setdefault('addresses', []).append(address)
gwkey = 'gateway{v}'.format(v=version)
if network['gateway']:
self.config[gwkey] = network['gateway']
else:
self.config.pop(gwkey, None)
ns = self.config.setdefault('nameservers', {})
if network['nameservers']:
ns.setdefault('addresses', []).extend(network['nameservers'])
if network['searchdomains']:
ns.setdefault('search', []).extend(network['searchdomains'])
class NetworkModel(object):
""" """
def __init__(self, project, support_wlan=True):
self.support_wlan = support_wlan
self.devices_by_name = {} # Maps interface names to NetworkDev
self.has_network = False
self.project = project
def parse_netplan_configs(self, netplan_root):
self.config = netplan.Config()
self.config.load_from_root(netplan_root)
def new_link(self, ifindex, link):
log.debug("new_link %s %s %s", ifindex, link.name, link.type)
if link.type in NETDEV_IGNORED_IFACE_TYPES:
return
if not self.support_wlan and link.type == "wlan":
return
if link.is_virtual and (
link.type not in NETDEV_ALLOWED_VIRTUAL_IFACE_TYPES):
return
dev = self.devices_by_name.get(link.name)
if dev is not None:
# XXX What to do if types don't match??
if dev.info is not None:
# This shouldn't happen! No sense getting too upset
# about if it does though.
pass
else:
dev.info = link
else:
config = self.config.config_for_device(link)
if link.is_virtual and not config:
# If we see a virtual device without there already
# being a config for it, we just ignore it.
return
dev = NetworkDev(self, link.name, link.type)
dev.info = link
dev.config = config
log.debug("new_link %s %s with config %s",
ifindex, link.name,
netplan.sanitize_interface_config(dev.config))
self.devices_by_name[link.name] = dev
return dev
def update_link(self, ifindex):
for name, dev in self.devices_by_name.items():
if dev.ifindex == ifindex:
return dev
def del_link(self, ifindex):
for name, dev in self.devices_by_name.items():
if dev.ifindex == ifindex:
dev.info = None
if dev.is_virtual:
# We delete all virtual devices before running netplan
# apply. If a device has been deleted in the UI, we set
# dev.config to None. Now it's actually gone, forget we
# ever knew it existed.
if dev.config is None:
del self.devices_by_name[name]
else:
# If a physical interface disappears on us, it's gone.
del self.devices_by_name[name]
return dev
def new_vlan(self, device, tag):
name = "{name}.{tag}".format(name=device.name, tag=tag)
dev = self.devices_by_name[name] = NetworkDev(self, name, 'vlan')
dev.config = {
'link': device.name,
'id': tag,
}
return dev
def new_bond(self, name, interfaces, params):
dev = self.devices_by_name[name] = NetworkDev(self, name, 'bond')
dev.config = {
'interfaces': interfaces,
'parameters': params,
}
return dev
def get_all_netdevs(self, include_deleted=False):
devs = [v for k, v in sorted(self.devices_by_name.items())]
if not include_deleted:
devs = [v for v in devs if v.config is not None]
return devs
def get_netdev_by_name(self, name):
return self.devices_by_name[name]
def stringify_config(self, config):
return '\n'.join([
"# This is the network config written by '{}'".format(
self.project),
yaml.dump(config, default_flow_style=False),
])
def render_config(self):
config = {
'network': {
'version': 2,
},
}
type_to_key = {
'eth': 'ethernets',
'bond': 'bonds',
'wlan': 'wifis',
'vlan': 'vlans',
}
for dev in self.get_all_netdevs():
key = type_to_key[dev.type]
configs = config['network'].setdefault(key, {})
if dev.config or dev.is_used:
configs[dev.name] = dev.config
return config
def render(self):
return {
'write_files': {
'etc_netplan_installer': {
'path': 'etc/netplan/00-installer-config.yaml',
'content': self.stringify_config(self.render_config()),
},
'nonet': {
'path': ('etc/cloud/cloud.cfg.d/'
'subiquity-disable-cloudinit-networking.cfg'),
'content': 'network: {config: disabled}\n',
},
},
}