69f9121f64
On systems where ipv6 module is not loaded in kernel we need to avoid
usage of ip6tables. This patch reads
/proc/sys/net/ipv6/conf/default/disable_ipv6 file and if ipv6 is
disabled then ip6tables are not used in IptablesManager
Closes-Bug: #1352893
Conflicts:
neutron/agent/l3_agent.py
Change-Id: I07e5851aa25eb98b7a97dff86b9850475df85f64
(cherry picked from commit b6e9922364)
54 lines
1.8 KiB
Python
54 lines
1.8 KiB
Python
# Copyright 2013 IBM Corp.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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IPv6-related utilities and helper functions.
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"""
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import netaddr
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_IS_IPV6_ENABLED = None
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def get_ipv6_addr_by_EUI64(prefix, mac):
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# Check if the prefix is IPv4 address
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isIPv4 = netaddr.valid_ipv4(prefix)
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if isIPv4:
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msg = _("Unable to generate IP address by EUI64 for IPv4 prefix")
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raise TypeError(msg)
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try:
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eui64 = int(netaddr.EUI(mac).eui64())
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prefix = netaddr.IPNetwork(prefix)
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return netaddr.IPAddress(prefix.first + eui64 ^ (1 << 57))
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except (ValueError, netaddr.AddrFormatError):
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raise TypeError(_('Bad prefix or mac format for generating IPv6 '
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'address by EUI-64: %(prefix)s, %(mac)s:')
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% {'prefix': prefix, 'mac': mac})
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except TypeError:
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raise TypeError(_('Bad prefix type for generate IPv6 address by '
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'EUI-64: %s') % prefix)
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def is_enabled():
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global _IS_IPV6_ENABLED
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if _IS_IPV6_ENABLED is None:
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disabled_ipv6_path = "/proc/sys/net/ipv6/conf/default/disable_ipv6"
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with open(disabled_ipv6_path, 'r') as f:
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disabled = f.read().strip()
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_IS_IPV6_ENABLED = disabled == "0"
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return _IS_IPV6_ENABLED
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