def _get_vlan_egress_flow_msgs(
dp,
table_no,
ip,
out_port=None,
priority=0,
direction=Direction.IN,
):
"""
Install egress flows
Args:
dp datapath
table_no table to install flow
out_port specify egress port, if None reg value is used
priority flow priority
direction packet direction.
"""
msgs = []
if out_port:
output_reg = None
else:
output_reg = TUN_PORT_REG
# Pass non vlan packet as it is.
match = MagmaMatch(
direction=direction,
eth_type=ether_types.ETH_TYPE_IP,
vlan_vid=(0x0000, 0x1000),
ipv4_dst=ip,
)
msgs.append(
flows.get_add_output_flow_msg(
dp,
table_no,
match,
[],
priority=priority,
output_reg=output_reg,
output_port=out_port,
), )
# remove vlan header for out_port.
match = MagmaMatch(
direction=direction,
eth_type=ether_types.ETH_TYPE_IP,
vlan_vid=(0x1000, 0x1000),
ipv4_dst=ip,
)
actions_vlan_pop = [dp.ofproto_parser.OFPActionPopVlan()]
msgs.append(
flows.get_add_output_flow_msg(
dp,
table_no,
match,
actions_vlan_pop,
priority=priority,
output_reg=output_reg,
output_port=out_port,
), )
return msgs
def _get_proxy_flow_msgs(self, dp):
"""
Install egress flows
Args:
dp datapath
table_no table to install flow
out_port specify egress port, if None reg value is used
priority flow priority
direction packet direction.
"""
if self.config.he_proxy_port <= 0:
return []
parser = dp.ofproto_parser
match = MagmaMatch(proxy_tag=PROXY_TAG_TO_PROXY)
actions = [
parser.NXActionRegLoad2(dst='eth_dst',
value=self.config.he_proxy_eth_mac)
]
return [
flows.get_add_output_flow_msg(
dp,
self._egress_tbl_num,
match,
priority=flows.UE_FLOW_PRIORITY,
actions=actions,
output_port=self.config.he_proxy_port)
]
def _get_default_egress_flow_msgs(self,
dp,
mac_addr: str = "",
vlan: str = ""):
"""
Egress table is the last table that a packet touches in the pipeline.
Output downlink traffic to gtp port, uplink trafic to LOCAL
Args:
mac_addr: In Non NAT mode, this is upstream internet GW mac address
vlan: in multi APN this is vlan_id of the upstream network.
Raises:
MagmaOFError if any of the default flows fail to install.
"""
msgs = []
if self.config.setup_type == 'LTE':
msgs.extend(
_get_vlan_egress_flow_msgs(dp, self._egress_tbl_num,
"0.0.0.0/0"))
msgs.extend(self._get_proxy_flow_msgs(dp))
else:
# Use regular match for Non LTE setup.
downlink_match = MagmaMatch(direction=Direction.IN)
msgs.append(
flows.get_add_output_flow_msg(
dp,
self._egress_tbl_num,
downlink_match, [],
output_port=self.config.gtp_port))
if vlan.isdigit():
vid = 0x1000 | int(vlan)
uplink_match = MagmaMatch(direction=Direction.OUT, vlan_vid=(vid))
else:
uplink_match = MagmaMatch(direction=Direction.OUT)
actions = []
# avoid resetting mac address on switch connect event.
if mac_addr == "":
mac_addr = self._current_upstream_mac_map.get(vlan, "")
if mac_addr == "" and self.config.enable_nat is False and \
self.config.setup_type == 'LTE':
mac_addr = self.config.uplink_gw_mac
if mac_addr != "":
parser = dp.ofproto_parser
actions.append(
parser.NXActionRegLoad2(dst='eth_dst', value=mac_addr))
if self._current_upstream_mac_map.get(vlan, "") != mac_addr:
self.logger.info("Using GW: mac: %s match %s actions: %s",
mac_addr, str(uplink_match.ryu_match),
str(actions))
self._current_upstream_mac_map[vlan] = mac_addr
if vlan.isdigit():
priority = flows.UE_FLOW_PRIORITY
elif mac_addr != "":
priority = flows.DEFAULT_PRIORITY
else:
priority = flows.MINIMUM_PRIORITY
msgs.append(
flows.get_add_output_flow_msg(dp,
self._egress_tbl_num,
uplink_match,
priority=priority,
actions=actions,
output_port=self.config.uplink_port))
return msgs
def _get_vlan_egress_flow_msgs(
dp,
table_no,
eth_type,
ip,
out_port=None,
priority=0,
direction=Direction.IN,
dst_mac=None,
):
"""
Install egress flows
Args:
dp datapath
table_no table to install flow
out_port specify egress port, if None reg value is used
priority flow priority
direction packet direction.
"""
msgs = []
if out_port:
output_reg = None
else:
output_reg = TUN_PORT_REG
# Pass non vlan packet as it is.
# TODO: add support to match IPv6 address
if ip:
match = MagmaMatch(
direction=direction,
eth_type=eth_type,
vlan_vid=(0x0000, 0x1000),
ipv4_dst=ip,
)
else:
match = MagmaMatch(
direction=direction,
eth_type=eth_type,
vlan_vid=(0x0000, 0x1000),
)
actions = []
if dst_mac:
actions.append(
dp.ofproto_parser.NXActionRegLoad2(dst='eth_dst', value=dst_mac))
msgs.append(
flows.get_add_output_flow_msg(
dp,
table_no,
match,
actions,
priority=priority,
output_reg=output_reg,
output_port=out_port,
), )
# remove vlan header for out_port.
if ip:
match = MagmaMatch(
direction=direction,
eth_type=eth_type,
vlan_vid=(0x1000, 0x1000),
ipv4_dst=ip,
)
else:
match = MagmaMatch(
direction=direction,
eth_type=eth_type,
vlan_vid=(0x1000, 0x1000),
)
actions = [dp.ofproto_parser.OFPActionPopVlan()]
if dst_mac:
actions.append(
dp.ofproto_parser.NXActionRegLoad2(dst='eth_dst', value=dst_mac))
msgs.append(
flows.get_add_output_flow_msg(
dp,
table_no,
match,
actions,
priority=priority,
output_reg=output_reg,
output_port=out_port,
), )
return msgs
