#!/bin/bash
# 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.

bind_port() {
    PORT_ID=$1
    IFNAME=$2
    ENDPOINT_ID=$3
    MAC_ADDRESS=$4
    NET_ID=$5
    echo "plugging veth $IFNAME (Neutron port $PORT_ID)..."

    # create a linux bridge
    br_name="brq"${NET_ID:0:11}
    ip link show $br_name
    if [ $? -ne 0 ]; then
        echo "Bridge $br_name does not exist, create it"
        ip link add name $br_name type bridge
        echo 0 > /sys/devices/virtual/net/$br_name/bridge/forward_delay
        echo 0 > /sys/devices/virtual/net/$br_name/bridge/stp_state
        ip link set $br_name  up
    else
        echo "Bridge $br_name exists"
    fi

    # connect the veth outside to linux bridge
    ip link set dev $IFNAME master $br_name
    ip link set $IFNAME up
}

unbind_port() {
    PORT_ID=$1
    IFNAME=$2
    ENDPOINT_ID=$3
    MAC_ADDRESS=$4
    VIF_DETAILs=$5
    NET_ID=$6
    echo "unplugging veth $IFNAME..."
    br_name="brq"${NET_ID:0:11}

    ip link set dev $IFNAME nomaster
}

case $1 in
    "bind")
        shift
        bind_port "$@"
        exit 0
        ;;
    "unbind")
        shift
        unbind_port "$@"
        exit 0
        ;;
    *)
        echo >&2 "$0: Invalid command $1."
        exit 1
        ;;
esac