def __init__(self, *args, **kwargs):
super(VRRPInterfaceMonitorNetworkDevice, self).__init__(*args,
**kwargs)
self.__is_active = True
config = self.config
if config.is_ipv6:
family = socket.AF_INET6
ether_type = ether.ETH_TYPE_IPV6
mac_address = vrrp.vrrp_ipv6_src_mac_address(config.vrid)
else:
family = socket.AF_INET
ether_type = ether.ETH_TYPE_IP
mac_address = vrrp.vrrp_ipv4_src_mac_address(config.vrid)
# socket module doesn't define IPPROTO_VRRP
self.ip_socket = socket.socket(family, socket.SOCK_RAW,
inet.IPPROTO_VRRP)
self.packet_socket = socket.socket(socket.AF_PACKET, socket.SOCK_RAW,
socket.htons(ether_type))
self.packet_socket.bind((self.interface.device_name, ether_type,
socket.PACKET_MULTICAST,
arp.ARP_HW_TYPE_ETHERNET,
addrconv.mac.text_to_bin(mac_address)))
self.ifindex = if_nametoindex(self.interface.device_name)
def _drop_match(self, dp):
kwargs = {}
kwargs['in_port'] = self.interface.port_no
kwargs['eth_dst'] = vrrp.vrrp_ipv4_src_mac_address(self.config.vrid)
if self.interface.vlan_id is not None:
kwargs['vlan_vid'] = self.interface.vlan_id
return dp.ofproto_parser.OFPMatch(**kwargs)
def __init__(self, *args, **kwargs):
super(VRRPInterfaceMonitorNetworkDevice, self).__init__(*args,
**kwargs)
self.__is_active = True
config = self.config
if config.is_ipv6:
family = socket.AF_INET6
ether_type = ether.ETH_TYPE_IPV6
mac_address = vrrp.vrrp_ipv6_src_mac_address(config.vrid)
else:
family = socket.AF_INET
ether_type = ether.ETH_TYPE_IP
mac_address = vrrp.vrrp_ipv4_src_mac_address(config.vrid)
# socket module doesn't define IPPROTO_VRRP
self.ip_socket = socket.socket(family, socket.SOCK_RAW,
inet.IPPROTO_VRRP)
self.packet_socket = socket.socket(socket.AF_PACKET, socket.SOCK_RAW,
socket.htons(ether_type))
self.packet_socket.bind((self.interface.device_name, ether_type,
socket.PACKET_MULTICAST,
arp.ARP_HW_TYPE_ETHERNET,
addrconv.mac.text_to_bin(mac_address)))
self.ifindex = if_nametoindex(self.interface.device_name)
def _drop_match(self, dp):
kwargs = {}
kwargs['in_port'] = self.interface.port_no
kwargs['eth_dst'] = vrrp.vrrp_ipv4_src_mac_address(self.config.vrid)
if self.interface.vlan_id is not None:
kwargs['vlan_vid'] = self.interface.vlan_id
return dp.ofproto_parser.OFPMatch(**kwargs)
def _arp_match(self, dp):
kwargs = {}
kwargs['in_port'] = self.interface.port_no
kwargs['eth_dst'] = mac_lib.BROADCAST_STR
kwargs['eth_type'] = ether.ETH_TYPE_ARP
if self.interface.vlan_id is not None:
kwargs['vlan_vid'] = self.interface.vlan_id
kwargs['arp_op'] = arp.ARP_REQUEST
kwargs['arp_tpa'] = vrrp.vrrp_ipv4_src_mac_address(self.config.vrid)
return dp.ofproto_parser.OFPMatch(**kwargs)
def _arp_match(self, dp):
kwargs = {}
kwargs['in_port'] = self.interface.port_no
kwargs['eth_dst'] = mac_lib.BROADCAST_STR
kwargs['eth_type'] = ether.ETH_TYPE_ARP
if self.interface.vlan_id is not None:
kwargs['vlan_vid'] = self.interface.vlan_id
kwargs['arp_op'] = arp.ARP_REQUEST
kwargs['arp_tpa'] = vrrp.vrrp_ipv4_src_mac_address(self.config.vrid)
return dp.ofproto_parser.OFPMatch(**kwargs)
def _garp_packet(self, ip_address):
# prepare garp packet
src_mac = vrrp.vrrp_ipv4_src_mac_address(self.config.vrid)
e = ethernet.ethernet(mac_lib.BROADCAST_STR, src_mac,
ether.ETH_TYPE_ARP)
a = arp.arp_ip(arp.ARP_REQUEST, src_mac, ip_address,
mac_lib.DONTCARE_STR, ip_address)
p = packet.Packet()
p.add_protocol(e)
utils.may_add_vlan(p, self.interface.vlan_id)
p.add_protocol(a)
p.serialize()
return p
def _garp_packet(self, ip_address):
# prepare garp packet
src_mac = vrrp.vrrp_ipv4_src_mac_address(self.config.vrid)
e = ethernet.ethernet(mac_lib.BROADCAST_STR, src_mac,
ether.ETH_TYPE_ARP)
a = arp.arp_ip(arp.ARP_REQUEST, src_mac, ip_address,
mac_lib.DONTCARE_STR, ip_address)
p = packet.Packet()
p.add_protocol(e)
utils.may_add_vlan(p, self.interface.vlan_id)
p.add_protocol(a)
p.serialize()
return p
def _join_multicast_membership(self, join_leave):
config = self.config
if config.is_ipv6:
mac_address = vrrp.vrrp_ipv6_src_mac_address(config.vrid)
else:
mac_address = vrrp.vrrp_ipv4_src_mac_address(config.vrid)
if join_leave:
add_drop = PACKET_ADD_MEMBERSHIP
else:
add_drop = PACKET_DROP_MEMBERSHIP
packet_mreq = struct.pack('IHH8s', self.ifindex,
PACKET_MR_MULTICAST, 6,
addrconv.mac.text_to_bin(mac_address))
self.packet_socket.setsockopt(SOL_PACKET, add_drop, packet_mreq)
def _arp_reply_packet(self, arp_req_sha, arp_req_spa, arp_req_tpa):
if not (arp_req_tpa in self.config.ip_addresses
or arp_req_tpa == self.config.primary_ip_address):
return None
src_mac = vrrp.vrrp_ipv4_src_mac_address(self.config.vrid)
e = ethernet.ethernet(arp_req_sha, src_mac, ether.ETH_TYPE_ARP)
a = arp.arp_ip(arp.ARP_REPLY, src_mac, arp_req_tpa, arp_req_sha,
arp_req_spa)
p = packet.Packet()
p.add_protocol(e)
utils.may_add_vlan(p, self.interface.vlan_id)
p.add_protocol(a)
p.serialize()
self._transmit(p.data)
def _arp_reply_packet(self, arp_req_sha, arp_req_spa, arp_req_tpa):
if not (arp_req_tpa in self.config.ip_addresses or
arp_req_tpa == self.config.primary_ip_address):
return None
src_mac = vrrp.vrrp_ipv4_src_mac_address(self.config.vrid)
e = ethernet.ethernet(arp_req_sha, src_mac, ether.ETH_TYPE_ARP)
a = arp.arp_ip(arp.ARP_REPLY, src_mac, arp_req_tpa,
arp_req_sha, arp_req_spa)
p = packet.Packet()
p.add_protocol(e)
utils.may_add_vlan(p, self.interface.vlan_id)
p.add_protocol(a)
p.serialize()
self._transmit(p.data)
def _join_multicast_membership(self, join_leave):
config = self.config
if config.is_ipv6:
mac_address = vrrp.vrrp_ipv6_src_mac_address(config.vrid)
else:
mac_address = vrrp.vrrp_ipv4_src_mac_address(config.vrid)
if join_leave:
add_drop = PACKET_ADD_MEMBERSHIP
else:
add_drop = PACKET_DROP_MEMBERSHIP
# struct packet_mreq {
# int mr_ifindex;
# unsigned short mr_type;
# unsigned short mr_alen;
# unsigned char mr_mr_address[8];
# };
packet_mreq = struct.pack('IHH8s', self.ifindex, PACKET_MR_MULTICAST,
6, addrconv.mac.text_to_bin(mac_address))
self.packet_socket.setsockopt(SOL_PACKET, add_drop, packet_mreq)
def _arp_process(self, data):
dst_mac = vrrp.vrrp_ipv4_src_mac_address(self.config.vrid)
arp_sha = None
arp_spa = None
arp_tpa = None
p = packet.Packet(data)
for proto in p.protocols:
if isinstance(proto, ethernet.ethernet):
if proto.dst not in (mac_lib.BROADCAST_STR, dst_mac):
return None
ethertype = proto.ethertype
if not ((self.interface.vlan_id is None and
ethertype == ether.ETH_TYPE_ARP) or
(self.interface.vlan_id is not None and
ethertype == ether.ETH_TYPE_8021Q)):
return None
elif isinstance(proto, vlan.vlan):
if (proto.vid != self.interface.vlan_id or
proto.ethertype != ether.ETH_TYPE_ARP):
return None
elif isinstance(proto, arp.arp):
if (proto.hwtype != arp.ARP_HW_TYPE_ETHERNET or
proto.proto != ether.ETH_TYPE_IP or
proto.hlen != 6 or proto.plen != 4 or
proto.opcode != arp.ARP_REQUEST or
proto.dst_mac != dst_mac):
return None
arp_sha = proto.src_mac
arp_spa = proto.src_ip
arp_tpa = proto.dst_ip
break
if arp_sha is None or arp_spa is None or arp_tpa is None:
self.logger.debug('malformed arp request? arp_sha %s arp_spa %s',
arp_sha, arp_spa)
return None
self._arp_reply_packet(arp_sha, arp_spa, arp_tpa)
def _arp_process(self, data):
dst_mac = vrrp.vrrp_ipv4_src_mac_address(self.config.vrid)
arp_sha = None
arp_spa = None
arp_tpa = None
p = packet.Packet(data)
for proto in p.protocols:
if isinstance(proto, ethernet.ethernet):
if proto.dst not in (mac_lib.BROADCAST_STR, dst_mac):
return None
ethertype = proto.ethertype
if not ((self.interface.vlan_id is None
and ethertype == ether.ETH_TYPE_ARP) or
(self.interface.vlan_id is not None
and ethertype == ether.ETH_TYPE_8021Q)):
return None
elif isinstance(proto, vlan.vlan):
if (proto.vid != self.interface.vlan_id
or proto.ethertype != ether.ETH_TYPE_ARP):
return None
elif isinstance(proto, arp.arp):
if (proto.hwtype != arp.ARP_HW_TYPE_ETHERNET
or proto.proto != ether.ETH_TYPE_IP or proto.hlen != 6
or proto.plen != 4 or proto.opcode != arp.ARP_REQUEST
or proto.dst_mac != dst_mac):
return None
arp_sha = proto.src_mac
arp_spa = proto.src_ip
arp_tpa = proto.dst_ip
break
if arp_sha is None or arp_spa is None or arp_tpa is None:
self.logger.debug('malformed arp request? arp_sha %s arp_spa %s',
arp_sha, arp_spa)
return None
self._arp_reply_packet(arp_sha, arp_spa, arp_tpa)
def _ofp_match(self, ofproto_parser):
is_ipv6 = vrrp.is_ipv6(self.config.ip_addresses[0])
kwargs = {}
kwargs['in_port'] = self.interface.port_no
if is_ipv6:
kwargs['eth_dst'] = vrrp.VRRP_IPV6_DST_MAC_ADDRESS
kwargs['eth_src'] = \
vrrp.vrrp_ipv6_src_mac_address(self.config.vrid)
kwargs['eth_type'] = ether.ETH_TYPE_IPV6
kwargs['ipv6_dst'] = vrrp.VRRP_IPV6_DST_ADDRESS
else:
kwargs['eth_dst'] = vrrp.VRRP_IPV4_DST_MAC_ADDRESS
kwargs['eth_src'] = \
vrrp.vrrp_ipv4_src_mac_address(self.config.vrid)
kwargs['eth_type'] = ether.ETH_TYPE_IP
kwargs['ipv4_dst'] = vrrp.VRRP_IPV4_DST_ADDRESS
if self.interface.vlan_id is not None:
kwargs['vlan_vid'] = self.interface.vlan_id
kwargs['ip_proto'] = inet.IPPROTO_VRRP
# OF1.2 doesn't support TTL match.
# It needs to be checked by packet in handler
return ofproto_parser.OFPMatch(**kwargs)
def _ofp_match(self, ofproto_parser):
is_ipv6 = vrrp.is_ipv6(self.config.ip_addresses[0])
kwargs = {}
kwargs['in_port'] = self.interface.port_no
if is_ipv6:
kwargs['eth_dst'] = vrrp.VRRP_IPV6_DST_MAC_ADDRESS
kwargs['eth_src'] = \
vrrp.vrrp_ipv6_src_mac_address(self.config.vrid)
kwargs['eth_type'] = ether.ETH_TYPE_IPV6
kwargs['ipv6_dst'] = vrrp.VRRP_IPV6_DST_ADDRESS
else:
kwargs['eth_dst'] = vrrp.VRRP_IPV4_DST_MAC_ADDRESS
kwargs['eth_src'] = \
vrrp.vrrp_ipv4_src_mac_address(self.config.vrid)
kwargs['eth_type'] = ether.ETH_TYPE_IP
kwargs['ipv4_dst'] = vrrp.VRRP_IPV4_DST_ADDRESS
if self.interface.vlan_id is not None:
kwargs['vlan_vid'] = self.interface.vlan_id
kwargs['ip_proto'] = inet.IPPROTO_VRRP
# OF1.2 doesn't support TTL match.
# It needs to be checked by packet in handler
return ofproto_parser.OFPMatch(**kwargs)