"""Implementation of Valve coprocessor."""
# Copyright (C) 2013 Nippon Telegraph and Telephone Corporation.
# Copyright (C) 2015 Brad Cowie, Christopher Lorier and Joe Stringer.
# Copyright (C) 2015 Research and Education Advanced Network New Zealand Ltd.
# Copyright (C) 2015--2019 The Contributors
#
# 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.
from faucet import valve_of
from faucet.valve_manager_base import ValveManagerBase
from faucet.vlan import OFVLAN
[docs]
class CoprocessorManager(ValveManagerBase):
"""Implementation of Valve coprocessor."""
def __init__(
self,
ports,
copro_table,
vlan_table,
eth_src_table, # pylint: disable=too-many-arguments
output_table,
low_priority,
high_priority,
):
self.ports = ports
self.copro_table = copro_table
self.vlan_table = vlan_table
self.eth_src_table = eth_src_table
self.output_table = output_table
self.low_priority = low_priority
self.high_priority = high_priority
[docs]
def add_port(self, port):
"""Add flows to allow coprocessor to inject or output packets."""
ofmsgs = []
if port.coprocessor:
ofmsgs.append(
self.vlan_table.flowmod(
self.vlan_table.match(in_port=port.number),
priority=self.low_priority,
inst=(self.vlan_table.goto(self.copro_table),),
)
)
ofmsgs.append(
self.eth_src_table.flowmod(
match=self.eth_src_table.match(in_port=port.number),
priority=self.high_priority,
inst=(self.eth_src_table.goto(self.output_table),),
)
)
# TODO: add additional output port strategies (eg. MPLS) and tagged ports
vlan_vid_base = port.coprocessor.get("vlan_vid_base", 0)
for port_number in self.ports:
inst = (
valve_of.apply_actions(
(valve_of.pop_vlan(), valve_of.output_port(port_number))
),
)
vid = vlan_vid_base + port_number
vlan = OFVLAN(str(vid), vid)
match = self.copro_table.match(vlan=vlan)
ofmsgs.append(
self.copro_table.flowmod(
match=match, priority=self.high_priority, inst=inst
)
)
return ofmsgs