92 lines
2.9 KiB
Python
92 lines
2.9 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import struct
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import netaddr
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from neutron.agent.common import utils
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from neutron_lib import constants as n_const
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from os_ken.lib import addrconv
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from os_ken.ofproto import ether
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from oslo_log import log
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from dragonflow.common import exceptions
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LOG = log.getLogger(__name__)
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def ipv4_text_to_int(ip_text):
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try:
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return struct.unpack('!I', addrconv.ipv4.text_to_bin(ip_text))[0]
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except Exception:
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raise exceptions.InvalidIPAddressException(key=ip_text)
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def ipv6_text_to_short(ip_text):
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try:
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return list(struct.unpack('!8H', addrconv.ipv6.text_to_bin(ip_text)))
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except Exception:
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raise exceptions.InvalidIPAddressException(key=ip_text)
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def delete_conntrack_entries_by_filter(ethertype='IPv4', protocol=None,
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nw_src=None, nw_dst=None, zone=None):
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cmd = ['conntrack', '-D']
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if protocol:
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cmd.extend(['-p', str(protocol)])
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cmd.extend(['-f', ethertype.lower()])
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if nw_src:
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cmd.extend(['-s', str(nw_src)])
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if nw_dst:
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cmd.extend(['-d', str(nw_dst)])
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if zone:
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cmd.extend(['-w', str(zone)])
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try:
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utils.execute(cmd, run_as_root=True, check_exit_code=True,
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extra_ok_codes=[1])
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LOG.debug("Successfully executed conntrack command %s", cmd)
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except RuntimeError:
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LOG.exception("Failed execute conntrack command %s", cmd)
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def ethertype_to_ip_version(ethertype):
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if ethertype == n_const.IPv4:
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return n_const.IP_VERSION_4
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if ethertype == n_const.IPv6:
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return n_const.IP_VERSION_6
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raise exceptions.InvalidEtherTypeException(ethertype=ethertype)
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def get_eth_from_ip_version(ip_version):
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"""
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Returns the eth_type that should be matched to the received ip
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:param ip_version: IP version int in the format 4/6
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"""
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match_items = {
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(n_const.IP_VERSION_4): ether.ETH_TYPE_IP,
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(n_const.IP_VERSION_6): ether.ETH_TYPE_IPV6
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}
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return match_items[ip_version]
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def get_port_match_list_from_port_range(port_range_min, port_range_max):
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port_range = netaddr.IPRange(port_range_min, port_range_max)
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ports_match_list = []
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for cidr in port_range.cidrs():
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port_num = int(cidr.network) & 0xffff
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mask = int(cidr.netmask) & 0xffff
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ports_match_list.append((port_num, mask))
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return ports_match_list
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