a sample application which dumps VRRP events Signed-off-by: Isaku Yamahata <yamah...@valinux.co.jp> --- ryu/services/vrrp/dumper.py | 154 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 154 insertions(+) create mode 100644 ryu/services/vrrp/dumper.py
diff --git a/ryu/services/vrrp/dumper.py b/ryu/services/vrrp/dumper.py new file mode 100644 index 0000000..463556e --- /dev/null +++ b/ryu/services/vrrp/dumper.py @@ -0,0 +1,154 @@ +# Copyright (C) 2013 Nippon Telegraph and Telephone Corporation. +# Copyright (C) 2013 Isaku Yamahata <yamahata at private email ne jp> +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or +# implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +""" +VRRP event dumper +This is also a template for router implementation that support VRRP +""" + +from ryu.base import app_manager +from ryu.controller import handler +from ryu.services.vrrp import event as vrrp_event + + +class VRRPDumper(app_manager.RyuApp): + def __init__(self, *args, **kwargs): + super(VRRPDumper, self).__init__(*args, **kwargs) + + @handler.set_ev_cls(vrrp_event.EventVRRPStateChanged) + def vrrp_state_changed_handler(self, ev): + old_state = ev.old_state + new_state = ev.new_state + self.logger.info('state change %s: %s -> %s', ev.instance_name, + old_state, new_state) + if new_state == vrrp_event.VRRP_STATE_MASTER: + self.logger.info('becomes master') + if old_state is None: + # RFC3768 6.4.1 + # o Broadcast a gratuitous ARP request containing the virtual + # router MAC address for each IP address associated with the + # virtual router. + # + # or + # + # RFC 5795 6.4.1 + #(115)+ If the protected IPvX address is an IPv4 address, then: + # (120) * Broadcast a gratuitous ARP request containing the + # virtual router MAC address for each IP address associated + # with the virtual router. + #(125) + else // IPv6 + # (130) * For each IPv6 address associated with the virtual + # router, send an unsolicited ND Neighbor Advertisement with + # the Router Flag (R) set, the Solicited Flag (S) unset, the + # Override flag (O) set, the target address set to the IPv6 + # address of the virtual router, and the target link-layer + # address set to the virtual router MAC address. + # + pass + elif old_state == vrrp_event.VRRP_STATE_BACKUP: + # RFC3768 6.4.2 + # o Broadcast a gratuitous ARP request containing the virtual + # router MAC address for each IP address associated with the + # virtual router + # + # or + # + # RFC 5795 6.4.2 + #(375)+ If the protected IPvX address is an IPv4 address, then: + # (380)* Broadcast a gratuitous ARP request on that interface + # containing the virtual router MAC address for each IPv4 + # address associated with the virtual router. + #(385) + else // ipv6 + # (390) * Compute and join the Solicited-Node multicast + # address [RFC4291] for the IPv6 address(es) associated with + # the virtual router. + # (395) * For each IPv6 address associated with the virtual + # router, send an unsolicited ND Neighbor Advertisement with + # the Router Flag (R) set, the Solicited Flag (S) unset, the + # Override flag (O) set, the target address set to the IPv6 + # address of the virtual router, and the target link-layer + # address set to the virtual router MAC address. + pass + + # RFC 3768 6.4.3 + # - MUST respond to ARP requests for the IP address(es) associated + # with the virtual router. + # - MUST forward packets with a destination link layer MAC address + # equal to the virtual router MAC address. + # - MUST NOT accept packets addressed to the IP address(es) + # associated with the virtual router if it is not the IP address + # owner. + # - MUST accept packets addressed to the IP address(es) associated + # with the virtual router if it is the IP address owner. + # + # or + # + # RFC5798 6.4.3 + #(605) - If the protected IPvX address is an IPv4 address, then: + # (610) + MUST respond to ARP requests for the IPv4 address(es) + # associated with the virtual router. + #(615) - else // ipv6 + # (620) + MUST be a member of the Solicited-Node multicast + # address for the IPv6 address(es) associated with the virtual + # router. + # (625) + MUST respond to ND Neighbor Solicitation message for + # the IPv6 address(es) associated with the virtual router. + # (630) ++ MUST send ND Router Advertisements for the virtual + # router. + # (635) ++ If Accept_Mode is False: MUST NOT drop IPv6 Neighbor + # Solicitations and Neighbor Advertisements. + #(640) +-endif // ipv4? + #(645) - MUST forward packets with a destination link-layer MAC + #address equal to the virtual router MAC address. + #(650) - MUST accept packets addressed to the IPvX address(es) + #associated with the virtual router if it is the IPvX address owner + #or if Accept_Mode is True. Otherwise, MUST NOT accept these + #packets. + + elif new_state == vrrp_event.VRRP_STATE_BACKUP: + self.logger.info('becomes backup') + + # RFC 3768 6.4.2 Backup + # - MUST NOT respond to ARP requests for the IP address(s) + # associated with the virtual router. + # - MUST discard packets with a destination link layer MAC address + # equal to the virtual router MAC address. + # - MUST NOT accept packets addressed to the IP address(es) + # associated with the virtual router. + # + # or + # + # RFC 5798 6.4.2 Backup + #(305) - If the protected IPvX address is an IPv4 address, then: + # (310) + MUST NOT respond to ARP requests for the IPv4 + # address(es) associated with the virtual router. + #(315) - else // protected addr is IPv6 + # (320) + MUST NOT respond to ND Neighbor Solicitation messages + # for the IPv6 address(es) associated with the virtual router. + # (325) + MUST NOT send ND Router Advertisement messages for the + # virtual router. + #(330) -endif // was protected addr IPv4? + #(335) - MUST discard packets with a destination link-layer MAC + #address equal to the virtual router MAC address. + #(340) - MUST NOT accept packets addressed to the IPvX address(es) + #associated with the virtual router. + elif new_state == vrrp_event.VRRP_STATE_INITIALIZE: + if old_state is None: + self.logger.info('initialized') + else: + self.logger.info('shutdowned') + else: + raise ValueError('invalid vrrp state %s' % new_state) -- 1.7.10.4 ------------------------------------------------------------------------------ Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. 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