platforms/local.py

# Copyright 2017-present Open Networking Foundation
#
# 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.


"""
Local platform

This platform uses veth pairs to send packets to and from a userspace
switch. The switch should be connected to veth0, veth2, veth4, and veth6.
"""

def platform_config_update(config):
    """
    Update configuration for the local platform

    @param config The configuration dictionary to use/update
    """
    base_of_port = 1
    base_if_index = 1
    port_count = 4

    port_map = {}
    # Use every other veth interface (veth1, veth3, ...)
    for idx in range(port_count):
        port_map[base_of_port + idx] = "veth%d" % (base_if_index + 2 * idx)
    config['port_map'] = port_map