x/vmware-nsx
Code Issues Proposed changes

Pass in certain ICMPv6 types by default

Browse Source 
This allows instances to do SLAAC configuration, without requiring
explicit security group rules to do so.

Closes-Bug: #1242933

Change-Id: I517c66a470296141c0024a64e39b6d40b0c0d581
This commit is contained in:
Sean M. Collins 2013-10-18 14:33:23 -04:00 committed by Sean M. Collins
parent 4cba28846c
commit 552037a5cf
4 changed files with 51 additions and 5 deletions
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11
neutron/agent/linux/iptables_firewall.py
View File

@ -243,6 +243,15 @@ class IptablesFirewallDriver(firewall.FirewallDriver):
#Note(nati) Drop dhcp packet from VM
return ['-p udp -m udp --sport 67 --dport 68 -j DROP']
def _accept_inbound_icmpv6(self):
# Allow router advertisements, multicast listener
# and neighbor advertisement into the instance
icmpv6_rules = []
for icmp6_type in constants.ICMPV6_ALLOWED_TYPES:
icmpv6_rules += ['-p icmpv6 --icmpv6-type %s -j RETURN' %
icmp6_type]
return icmpv6_rules
def _add_rule_by_security_group(self, port, direction):
chain_name = self._port_chain_name(port, direction)
# select rules for current direction
@ -259,6 +268,8 @@ class IptablesFirewallDriver(firewall.FirewallDriver):
ipv4_iptables_rule,
ipv6_iptables_rule)
ipv4_iptables_rule += self._drop_dhcp_rule()
if direction == INGRESS_DIRECTION:
ipv6_iptables_rule += self._accept_inbound_icmpv6()
ipv4_iptables_rule += self._convert_sgr_to_iptables_rules(
ipv4_sg_rules)
ipv6_iptables_rule += self._convert_sgr_to_iptables_rules(

9
neutron/common/constants.py
View File

@ -92,3 +92,12 @@ PROTO_NUM_TCP = 6
PROTO_NUM_ICMP = 1
PROTO_NUM_ICMP_V6 = 58
PROTO_NUM_UDP = 17
# List of ICMPv6 types that should be allowed by default:
# Multicast Listener Query (130),
# Multicast Listener Report (131),
# Multicast Listener Done (132),
# Router Advertisement (134),
# Neighbor Solicitation (135),
# Neighbor Advertisement (136)
ICMPV6_ALLOWED_TYPES = [130, 131, 132, 134, 135, 136]

12
neutron/tests/unit/test_iptables_firewall.py
View File

@ -23,6 +23,7 @@ from oslo.config import cfg
from neutron.agent.common import config as a_cfg
from neutron.agent.linux.iptables_firewall import IptablesFirewallDriver
from neutron.common import constants
from neutron.tests import base
from neutron.tests.unit import test_api_v2
@ -747,8 +748,15 @@ class IptablesFirewallTestCase(base.BaseTestCase):
'-m physdev --physdev-out tapfake_dev '
'--physdev-is-bridged '
'-j $ifake_dev'),
call.add_rule(
'ifake_dev', '-m state --state INVALID -j DROP'),
]
if ethertype == 'IPv6':
for icmp6_type in constants.ICMPV6_ALLOWED_TYPES:
calls.append(
call.add_rule('ifake_dev',
'-p icmpv6 --icmpv6-type %s -j RETURN' %
icmp6_type))
calls += [call.add_rule('ifake_dev',
'-m state --state INVALID -j DROP'),
call.add_rule(
'ifake_dev',
'-m state --state RELATED,ESTABLISHED -j RETURN')]

18
neutron/tests/unit/test_security_groups_rpc.py
View File

@ -1092,6 +1092,12 @@ IPTABLES_FILTER_V6_1 = """# Generated by iptables_manager
%(physdev_is_bridged)s -j %(bn)s-sg-chain
[0:0] -A %(bn)s-sg-chain %(physdev_mod)s --physdev-INGRESS tap_port1 \
%(physdev_is_bridged)s -j %(bn)s-i_port1
[0:0] -A %(bn)s-i_port1 -p icmpv6 --icmpv6-type 130 -j RETURN
[0:0] -A %(bn)s-i_port1 -p icmpv6 --icmpv6-type 131 -j RETURN
[0:0] -A %(bn)s-i_port1 -p icmpv6 --icmpv6-type 132 -j RETURN
[0:0] -A %(bn)s-i_port1 -p icmpv6 --icmpv6-type 134 -j RETURN
[0:0] -A %(bn)s-i_port1 -p icmpv6 --icmpv6-type 135 -j RETURN
[0:0] -A %(bn)s-i_port1 -p icmpv6 --icmpv6-type 136 -j RETURN
[0:0] -A %(bn)s-i_port1 -m state --state INVALID -j DROP
[0:0] -A %(bn)s-i_port1 -m state --state RELATED,ESTABLISHED -j RETURN
[0:0] -A %(bn)s-i_port1 -j %(bn)s-sg-fallback
@ -1137,6 +1143,12 @@ IPTABLES_FILTER_V6_2 = """# Generated by iptables_manager
%(physdev_is_bridged)s -j %(bn)s-sg-chain
[0:0] -A %(bn)s-sg-chain %(physdev_mod)s --physdev-INGRESS tap_port1 \
%(physdev_is_bridged)s -j %(bn)s-i_port1
[0:0] -A %(bn)s-i_port1 -p icmpv6 --icmpv6-type 130 -j RETURN
[0:0] -A %(bn)s-i_port1 -p icmpv6 --icmpv6-type 131 -j RETURN
[0:0] -A %(bn)s-i_port1 -p icmpv6 --icmpv6-type 132 -j RETURN
[0:0] -A %(bn)s-i_port1 -p icmpv6 --icmpv6-type 134 -j RETURN
[0:0] -A %(bn)s-i_port1 -p icmpv6 --icmpv6-type 135 -j RETURN
[0:0] -A %(bn)s-i_port1 -p icmpv6 --icmpv6-type 136 -j RETURN
[0:0] -A %(bn)s-i_port1 -m state --state INVALID -j DROP
[0:0] -A %(bn)s-i_port1 -m state --state RELATED,ESTABLISHED -j RETURN
[0:0] -A %(bn)s-i_port1 -j %(bn)s-sg-fallback
@ -1154,6 +1166,12 @@ IPTABLES_FILTER_V6_2 = """# Generated by iptables_manager
%(physdev_is_bridged)s -j %(bn)s-sg-chain
[0:0] -A %(bn)s-sg-chain %(physdev_mod)s --physdev-INGRESS tap_port2 \
%(physdev_is_bridged)s -j %(bn)s-i_port2
[0:0] -A %(bn)s-i_port2 -p icmpv6 --icmpv6-type 130 -j RETURN
[0:0] -A %(bn)s-i_port2 -p icmpv6 --icmpv6-type 131 -j RETURN
[0:0] -A %(bn)s-i_port2 -p icmpv6 --icmpv6-type 132 -j RETURN
[0:0] -A %(bn)s-i_port2 -p icmpv6 --icmpv6-type 134 -j RETURN
[0:0] -A %(bn)s-i_port2 -p icmpv6 --icmpv6-type 135 -j RETURN
[0:0] -A %(bn)s-i_port2 -p icmpv6 --icmpv6-type 136 -j RETURN
[0:0] -A %(bn)s-i_port2 -m state --state INVALID -j DROP
[0:0] -A %(bn)s-i_port2 -m state --state RELATED,ESTABLISHED -j RETURN
[0:0] -A %(bn)s-i_port2 -j %(bn)s-sg-fallback