def _render_subnets(cls, iface_cfg, subnets, has_default_route, flavor):
# setting base values
if flavor == "suse":
iface_cfg["BOOTPROTO"] = "static"
if "BRIDGE" in iface_cfg:
iface_cfg["BOOTPROTO"] = "dhcp"
iface_cfg.drop("BRIDGE")
else:
iface_cfg["BOOTPROTO"] = "none"
# modifying base values according to subnets
for i, subnet in enumerate(subnets, start=len(iface_cfg.children)):
mtu_key = "MTU"
subnet_type = subnet.get("type")
if subnet_type == "dhcp6" or subnet_type == "ipv6_dhcpv6-stateful":
if flavor == "suse":
# User wants dhcp for both protocols
if iface_cfg["BOOTPROTO"] == "dhcp4":
iface_cfg["BOOTPROTO"] = "dhcp"
else:
# Only IPv6 is DHCP, IPv4 may be static
iface_cfg["BOOTPROTO"] = "dhcp6"
iface_cfg["DHCLIENT6_MODE"] = "managed"
# only if rhel AND dhcpv6 stateful
elif (flavor == "rhel"
and subnet_type == "ipv6_dhcpv6-stateful"):
iface_cfg["BOOTPROTO"] = "dhcp"
iface_cfg["DHCPV6C"] = True
iface_cfg["IPV6INIT"] = True
iface_cfg["IPV6_AUTOCONF"] = False
else:
iface_cfg["IPV6INIT"] = True
# Configure network settings using DHCPv6
iface_cfg["DHCPV6C"] = True
elif subnet_type == "ipv6_dhcpv6-stateless":
if flavor == "suse":
# User wants dhcp for both protocols
if iface_cfg["BOOTPROTO"] == "dhcp4":
iface_cfg["BOOTPROTO"] = "dhcp"
else:
# Only IPv6 is DHCP, IPv4 may be static
iface_cfg["BOOTPROTO"] = "dhcp6"
iface_cfg["DHCLIENT6_MODE"] = "info"
else:
iface_cfg["IPV6INIT"] = True
# Configure network settings using SLAAC from RAs and
# optional info from dhcp server using DHCPv6
iface_cfg["IPV6_AUTOCONF"] = True
iface_cfg["DHCPV6C"] = True
# Use Information-request to get only stateless
# configuration parameters (i.e., without address).
iface_cfg["DHCPV6C_OPTIONS"] = "-S"
elif subnet_type == "ipv6_slaac":
if flavor == "suse":
# User wants dhcp for both protocols
if iface_cfg["BOOTPROTO"] == "dhcp4":
iface_cfg["BOOTPROTO"] = "dhcp"
else:
# Only IPv6 is DHCP, IPv4 may be static
iface_cfg["BOOTPROTO"] = "dhcp6"
iface_cfg["DHCLIENT6_MODE"] = "info"
else:
iface_cfg["IPV6INIT"] = True
# Configure network settings using SLAAC from RAs
iface_cfg["IPV6_AUTOCONF"] = True
elif subnet_type in ["dhcp4", "dhcp"]:
bootproto_in = iface_cfg["BOOTPROTO"]
iface_cfg["BOOTPROTO"] = "dhcp"
if flavor == "suse" and subnet_type == "dhcp4":
# If dhcp6 is already specified the user wants dhcp
# for both protocols
if bootproto_in != "dhcp6":
# Only IPv4 is DHCP, IPv6 may be static
iface_cfg["BOOTPROTO"] = "dhcp4"
elif subnet_type in ["static", "static6"]:
# RH info
# grep BOOTPROTO sysconfig.txt -A2 | head -3
# BOOTPROTO=none|bootp|dhcp
# 'bootp' or 'dhcp' cause a DHCP client
# to run on the device. Any other
# value causes any static configuration
# in the file to be applied.
if subnet_is_ipv6(subnet) and flavor != "suse":
mtu_key = "IPV6_MTU"
iface_cfg["IPV6INIT"] = True
if "mtu" in subnet:
mtu_mismatch = bool(
mtu_key in iface_cfg
and subnet["mtu"] != iface_cfg[mtu_key])
if mtu_mismatch:
LOG.warning(
"Network config: ignoring %s device-level mtu:%s"
" because ipv4 subnet-level mtu:%s provided.",
iface_cfg.name,
iface_cfg[mtu_key],
subnet["mtu"],
)
if subnet_is_ipv6(subnet):
if flavor == "suse":
# TODO(rjschwei) write mtu setting to
# /etc/sysctl.d/
pass
else:
iface_cfg[mtu_key] = subnet["mtu"]
else:
iface_cfg[mtu_key] = subnet["mtu"]
if subnet_is_ipv6(subnet) and flavor == "rhel":
iface_cfg["IPV6_FORCE_ACCEPT_RA"] = False
iface_cfg["IPV6_AUTOCONF"] = False
elif subnet_type == "manual":
if flavor == "suse":
LOG.debug('Unknown subnet type setting "%s"', subnet_type)
else:
# If the subnet has an MTU setting, then ONBOOT=True
# to apply the setting
iface_cfg["ONBOOT"] = mtu_key in iface_cfg
else:
raise ValueError(
"Unknown subnet type '%s' found for interface '%s'" %
(subnet_type, iface_cfg.name))
if subnet.get("control") == "manual":
if flavor == "suse":
iface_cfg["STARTMODE"] = "manual"
else:
iface_cfg["ONBOOT"] = False
# set IPv4 and IPv6 static addresses
ipv4_index = -1
ipv6_index = -1
for i, subnet in enumerate(subnets, start=len(iface_cfg.children)):
subnet_type = subnet.get("type")
# metric may apply to both dhcp and static config
if "metric" in subnet:
if flavor != "suse":
iface_cfg["METRIC"] = subnet["metric"]
if subnet_type in ["dhcp", "dhcp4"]:
# On SUSE distros 'DHCLIENT_SET_DEFAULT_ROUTE' is a global
# setting in /etc/sysconfig/network/dhcp
if flavor != "suse":
if has_default_route and iface_cfg["BOOTPROTO"] != "none":
iface_cfg["DHCLIENT_SET_DEFAULT_ROUTE"] = False
continue
elif subnet_type in IPV6_DYNAMIC_TYPES:
continue
elif subnet_type in ["static", "static6"]:
if subnet_is_ipv6(subnet):
ipv6_index = ipv6_index + 1
ipv6_cidr = "%s/%s" % (subnet["address"], subnet["prefix"])
if ipv6_index == 0:
if flavor == "suse":
iface_cfg["IPADDR6"] = ipv6_cidr
else:
iface_cfg["IPV6ADDR"] = ipv6_cidr
elif ipv6_index == 1:
if flavor == "suse":
iface_cfg["IPADDR6_1"] = ipv6_cidr
else:
iface_cfg["IPV6ADDR_SECONDARIES"] = ipv6_cidr
else:
if flavor == "suse":
iface_cfg["IPADDR6_%d" % ipv6_index] = ipv6_cidr
else:
iface_cfg["IPV6ADDR_SECONDARIES"] += (" " +
ipv6_cidr)
else:
ipv4_index = ipv4_index + 1
suff = "" if ipv4_index == 0 else str(ipv4_index)
iface_cfg["IPADDR" + suff] = subnet["address"]
iface_cfg["NETMASK" + suff] = net_prefix_to_ipv4_mask(
subnet["prefix"])
if "gateway" in subnet and flavor != "suse":
iface_cfg["DEFROUTE"] = True
if is_ipv6_address(subnet["gateway"]):
iface_cfg["IPV6_DEFAULTGW"] = subnet["gateway"]
else:
iface_cfg["GATEWAY"] = subnet["gateway"]
if "dns_search" in subnet and flavor != "suse":
iface_cfg["DOMAIN"] = " ".join(subnet["dns_search"])
if "dns_nameservers" in subnet and flavor != "suse":
if len(subnet["dns_nameservers"]) > 3:
# per resolv.conf(5) MAXNS sets this to 3.
LOG.debug(
"%s has %d entries in dns_nameservers. "
"Only 3 are used.",
iface_cfg.name,
len(subnet["dns_nameservers"]),
)
for i, k in enumerate(subnet["dns_nameservers"][:3], 1):
iface_cfg["DNS" + str(i)] = k
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.items():
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)
# Check if current device *may* have an ipv6 IP
use_ipv6 = False
if "inet6" in iface_details:
use_ipv6 = True
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 = {}
iface_info["ipv6"] = {}
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
if use_ipv6:
for k in ["address", "gateway"]:
if k in info:
val = info[k].strip().lower()
if val:
iface_info["ipv6"][k] = val
else:
for k in ["netmask", "address", "gateway", "broadcast"]:
if k in info:
val = info[k].strip().lower()
if val:
iface_info[k] = val
# handle static ip configurations using
# ipaddress/prefix-length format
if "address" in iface_info:
if "netmask" not in iface_info:
# check if the address has a network prefix
addr, _, prefix = iface_info["address"].partition("/")
if prefix:
iface_info["netmask"] = net_prefix_to_ipv4_mask(prefix)
iface_info["address"] = addr
# if we set the netmask, we also can set the broadcast
iface_info["broadcast"] = mask_and_ipv4_to_bcast_addr(
iface_info["netmask"], addr)
# 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
# If ipv6 is enabled, device will have multiple IPs, so we need to
# update the dictionary instead of overwriting it...
if dev_name in real_ifaces:
real_ifaces[dev_name].update(iface_info)
else:
real_ifaces[dev_name] = iface_info
# Check for those that should be started on boot via 'auto'
for (cmd, args) in entries:
args = args.split(None)
if not args:
continue
dev_name = args[0].strip().lower()
if cmd == "auto":
# Seems like auto can be like 'auto eth0 eth0:1' so just get the
# first part out as the device name
if dev_name in real_ifaces:
real_ifaces[dev_name]["auto"] = True
if cmd == "iface" and "inet6" in args:
real_ifaces[dev_name]["inet6"] = True
return real_ifaces
def _normalize_net_keys(network, address_keys=()):
"""Normalize dictionary network keys returning prefix and address keys.
@param network: A dict of network-related definition containing prefix,
netmask and address_keys.
@param address_keys: A tuple of keys to search for representing the address
or cidr. The first address_key discovered will be used for
normalization.
@returns: A dict containing normalized prefix and matching addr_key.
"""
net = dict((k, v) for k, v in network.items() if v)
addr_key = None
for key in address_keys:
if net.get(key):
addr_key = key
break
if not addr_key:
message = "No config network address keys [%s] found in %s" % (
",".join(address_keys),
network,
)
LOG.error(message)
raise ValueError(message)
addr = str(net.get(addr_key))
if not is_ip_network(addr):
LOG.error("Address %s is not a valid ip network", addr)
raise ValueError(f"Address {addr} is not a valid ip address")
ipv6 = is_ipv6_network(addr)
ipv4 = is_ipv4_network(addr)
netmask = net.get("netmask")
if "/" in addr:
addr_part, _, maybe_prefix = addr.partition("/")
net[addr_key] = addr_part
if ipv6:
# this supports input of ffff:ffff:ffff::
prefix = ipv6_mask_to_net_prefix(maybe_prefix)
elif ipv4:
# this supports input of 255.255.255.0
prefix = ipv4_mask_to_net_prefix(maybe_prefix)
else:
# In theory this never happens, is_ip_network() should catch all
# invalid networks
LOG.error("Address %s is not a valid ip network", addr)
raise ValueError(f"Address {addr} is not a valid ip address")
elif "prefix" in net:
prefix = int(net["prefix"])
elif netmask and ipv4:
prefix = ipv4_mask_to_net_prefix(netmask)
elif netmask and ipv6:
prefix = ipv6_mask_to_net_prefix(netmask)
else:
prefix = 64 if ipv6 else 24
if "prefix" in net and str(net["prefix"]) != str(prefix):
LOG.warning(
"Overwriting existing 'prefix' with '%s' in network info: %s",
prefix,
net,
)
net["prefix"] = prefix
if ipv6:
# TODO: we could/maybe should add this back with the very uncommon
# 'netmask' for ipv6. We need a 'net_prefix_to_ipv6_mask' for that.
if "netmask" in net:
del net["netmask"]
elif ipv4:
net["netmask"] = net_prefix_to_ipv4_mask(net["prefix"])
return net
