#!/bin/bash

# Copyright 2015 VMware, Inc.
#
# All Rights Reserved
#
#    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.


# Neutron VMware NSX plugin
# -------------------------

# Settings previously defined in devstack:lib/neutron-legacy
NEUTRON_CONF_DIR=/etc/neutron
export NEUTRON_TEST_CONFIG_FILE=${NEUTRON_TEST_CONFIG_FILE:-"$NEUTRON_CONF_DIR/debug.ini"}
Q_DHCP_CONF_FILE=$NEUTRON_CONF_DIR/dhcp_agent.ini

# The interface which has connectivity to the NSX Gateway uplink
NSX_GATEWAY_NETWORK_INTERFACE=${NSX_GATEWAY_NETWORK_INTERFACE:-}

# Override default 'True' in devstack:lib/neutron_plugins/services/l3
Q_USE_PROVIDERNET_FOR_PUBLIC=False

# Native support from platform
NATIVE_DHCP_METADATA=${NATIVE_DHCP_METADATA:-True}
NATIVE_METADATA_ROUTE=${NATIVE_METADATA_ROUTE:-169.254.169.254/31}
METADATA_PROXY_SHARED_SECRET=${METADATA_PROXY_SHARED_SECRET:-}

# Save trace setting
NSX_XTRACE=$(set +o | grep xtrace)
set +o xtrace

# File to store client certificate and PK
CLIENT_CERT_FILE=${DEST}/data/neutron/client.pem

source $TOP_DIR/lib/neutron_plugins/ovs_base


function _version { echo "$@" | awk -F. '{ printf("%d%03d%03d%03d\n", $1,$2,$3,$4); }'; }

function _ovsdb_connection {
    managers=(${NSX_MANAGER//,/ })
    NSX_MGR_IP=${managers[0]}
    NSX_VER=$(curl -1 -s -k -u "$NSX_USER:$NSX_PASSWORD" -H 'Accept: application/json' https://$NSX_MGR_IP/api/v1/node | python -c  'import sys, json; print json.load(sys.stdin)["node_version"][:5]')
    if [ $(_version $NSX_VER) -ge $(_version 1.1.0) ]; then
        echo "unix:/var/run/vmware/nsx-agent/nsxagent_ovsdb.sock"
    else
        echo "tcp:127.0.0.1:6632"
    fi
}

function setup_integration_bridge {
    die_if_not_set $LINENO NSX_MANAGER "NSX_MANAGER has not been set!"
    die_if_not_set $LINENO NSX_USER "NSX_USER has not been set!"
    die_if_not_set $LINENO NSX_PASSWORD "NSX_PASSWORD has not been set!"
    # Ensure that the OVS params are set for the OVS utils
    iniset $NEUTRON_CONF DEFAULT ovs_integration_bridge $OVS_BRIDGE
    iniset $NEUTRON_CONF OVS ovsdb_connection $(_ovsdb_connection)
    iniset $NEUTRON_CONF OVS ovsdb_interface vsctl
    _neutron_ovs_base_setup_bridge $OVS_BRIDGE
    sudo ovs-vsctl set bridge $OVS_BRIDGE external_ids:bridge-id=nsx-managed
    sudo ovs-vsctl set-manager $(_ovsdb_connection)
}

function is_neutron_ovs_base_plugin {
    # This allows the deployer to decide whether devstack should install OVS.
    # By default, we install OVS, to change this behavior add "OVS_BASE=1" to your localrc file.
    # Note: Any KVM compute must have OVS installed on it.
    return ${OVS_BASE:-0}
}

function neutron_plugin_create_nova_conf {
    if [[ "$VIRT_DRIVER" -ne 'vsphere' ]]; then
        # if n-cpu or octavia is enabled, then setup integration bridge
        if is_service_enabled n-cpu || is_service_enabled octavia ; then
            setup_integration_bridge
            if is_service_enabled n-cpu ; then
                iniset $NOVA_CONF neutron ovs_bridge $OVS_BRIDGE
            fi
        fi
    fi
    # if n-api is enabled, then setup the metadata_proxy_shared_secret
    if is_service_enabled n-api; then
        iniset $NOVA_CONF neutron service_metadata_proxy True
        if [[ "$NATIVE_DHCP_METADATA" == "True" ]]; then
            iniset $NOVA_CONF neutron metadata_proxy_shared_secret $METADATA_PROXY_SHARED_SECRET
            if [[ "$METADATA_PROXY_USE_HTTPS" == "True" ]]; then
                iniset $NOVA_CONF DEFAULT enabled_ssl_apis metadata
                if [[ "$METADATA_PROXY_CERT_FILE" != "" ]]; then
                    iniset $NOVA_CONF wsgi ssl_cert_file $METADATA_PROXY_CERT_FILE
                fi
                if [[ "$METADATA_PROXY_PRIV_KEY_FILE" != "" ]]; then
                    iniset $NOVA_CONF wsgi ssl_key_file $METADATA_PROXY_PRIV_KEY_FILE
                fi
            fi
        fi
    fi
}

function neutron_plugin_install_agent_packages {
    # VMware NSX Plugin does not run q-agt, but it currently needs dhcp and metadata agents
    _neutron_ovs_base_install_agent_packages
}

function neutron_plugin_configure_common {
    Q_PLUGIN_CONF_PATH=etc/neutron/plugins/vmware
    Q_PLUGIN_CONF_FILENAME=nsx.ini
    Q_PLUGIN_SRC_CONF_PATH=vmware-nsx/etc
    VMWARE_NSX_DIR=vmware-nsx
    # Uses oslo config generator to generate sample configuration file
    (cd $DEST/$VMWARE_NSX_DIR && exec ./tools/generate_config_file_samples.sh)
    mkdir -p /$Q_PLUGIN_CONF_PATH
    cp $DEST/$Q_PLUGIN_SRC_CONF_PATH/nsx.ini.sample /$Q_PLUGIN_CONF_PATH/$Q_PLUGIN_CONF_FILENAME
    sudo install -d -o $STACK_USER $NEUTRON_CONF_DIR/policy.d
    cp -v $DEST/$Q_PLUGIN_SRC_CONF_PATH/policy/routers.json $NEUTRON_CONF_DIR/policy.d
    cp -v $DEST/$Q_PLUGIN_SRC_CONF_PATH/policy/network-gateways.json $NEUTRON_CONF_DIR/policy.d
    Q_PLUGIN_CLASS="vmware_nsxv3"
}

function neutron_plugin_configure_debug_command {
    sudo ovs-vsctl --no-wait -- --may-exist add-br $PUBLIC_BRIDGE
    iniset $NEUTRON_TEST_CONFIG_FILE DEFAULT external_network_bridge "$PUBLIC_BRIDGE"
}

function neutron_plugin_configure_dhcp_agent {
    setup_integration_bridge
    iniset $Q_DHCP_CONF_FILE DEFAULT enable_isolated_metadata True
    iniset $Q_DHCP_CONF_FILE DEFAULT enable_metadata_network True
    iniset $Q_DHCP_CONF_FILE DEFAULT ovs_use_veth True
    iniset $Q_DHCP_CONF_FILE DEFAULT ovs_integration_bridge $OVS_BRIDGE
    iniset $Q_DHCP_CONF_FILE OVS ovsdb_connection $(_ovsdb_connection)
    iniset $Q_DHCP_CONF_FILE OVS ovsdb_interface vsctl
}

function neutron_plugin_configure_l3_agent {
    # VMware NSX plugin does not run L3 agent
    die $LINENO "q-l3 should not be executed with VMware NSX plugin!"
}

function neutron_plugin_configure_plugin_agent {
    # VMware NSX plugin does not run L2 agent
    die $LINENO "q-agt must not be executed with VMware NSX plugin!"
}

function _nsxv3_ini_set {
    if [[ $2 != "" ]]; then
        iniset /$Q_PLUGIN_CONF_FILE nsx_v3 $1 $2
    elif [[ $3 != "" ]]; then
        die $LINENO $3
    fi
}

function neutron_plugin_configure_service {
    _nsxv3_ini_set default_overlay_tz $DEFAULT_OVERLAY_TZ_UUID "The VMware NSX plugin won't work without a default transport zone."
    _nsxv3_ini_set default_vlan_tz $DEFAULT_VLAN_TZ_UUID
    if [[ "$DEFAULT_TIER0_ROUTER_UUID" != "" ]]; then
        _nsxv3_ini_set default_tier0_router $DEFAULT_TIER0_ROUTER_UUID
        Q_L3_ENABLED=True
        Q_L3_ROUTER_PER_TENANT=True
    fi
    # NSX_MANAGER must be a comma separated string
    if [[ "$NSX_MANAGERS" != "" ]]; then
        _nsxv3_ini_set nsx_api_managers $NSX_MANAGERS
    elif [[ "$NSX_MANAGER" != "" ]]; then
        _nsxv3_ini_set nsx_api_managers $NSX_MANAGER
    else
        die $LINENO "The VMware NSX plugin needs at least one NSX manager."
    fi
    if [[ "$NSX_L2GW_DRIVER" != "" ]]; then
        iniset /$Q_PLUGIN_CONF_FILE DEFAULT nsx_l2gw_driver $NSX_L2GW_DRIVER
    fi
    iniset /$Q_PLUGIN_CONF_FILE DEFAULT nsx_extension_drivers vmware_nsxv3_dns
    _nsxv3_ini_set nsx_api_user $NSX_USER
    _nsxv3_ini_set nsx_api_password $NSX_PASSWORD
    _nsxv3_ini_set retries $NSX_RETRIES
    _nsxv3_ini_set insecure $NSX_INSECURE
    _nsxv3_ini_set ca_file $NSX_CA_FILE
    _nsxv3_ini_set default_bridge_cluster $DEFAULT_BRIDGE_CLUSTER_UUID
    if [[ "$NATIVE_DHCP_METADATA" == "True" ]]; then
        _nsxv3_ini_set native_dhcp_metadata $NATIVE_DHCP_METADATA
        _nsxv3_ini_set native_metadata_route $NATIVE_METADATA_ROUTE
        _nsxv3_ini_set dhcp_profile $DHCP_PROFILE_UUID
        _nsxv3_ini_set metadata_proxy $METADATA_PROXY_UUID
        iniset $NEUTRON_CONF DEFAULT dhcp_agent_notification False
    fi
    if [[ "$NSX_USE_CLIENT_CERT_AUTH" == "True" ]]; then
        _nsxv3_ini_set nsx_use_client_auth "True"
        _nsxv3_ini_set nsx_client_cert_file "$CLIENT_CERT_FILE"
        _nsxv3_ini_set nsx_client_cert_storage "nsx-db"
        _nsxv3_ini_set nsx_client_cert_pk_password "openstack"
    fi
}

function neutron_plugin_setup_interface_driver {
    local conf_file=$1
    iniset $conf_file DEFAULT interface_driver neutron.agent.linux.interface.OVSInterfaceDriver
}

function neutron_plugin_check_adv_test_requirements {
    is_service_enabled q-dhcp && return 0
}


function init_vmware_nsx_v3 {
    if [[ "$NATIVE_DHCP_METADATA" == "True" ]]; then
        if ! is_set DHCP_PROFILE_UUID; then
            die $LINENO "DHCP profile needs to be configured!"
        fi
        if ! is_set METADATA_PROXY_UUID; then
            die $LINENO "Metadata proxy needs to be configured!"
        fi
        if is_service_enabled q-dhcp q-meta; then
            die $LINENO "Native support does not require DHCP and Metadata agents!"
        fi
    fi
    # Generate client certificate
    if [[ "$NSX_USE_CLIENT_CERT_AUTH" == "True" ]]; then
        nsxadmin -o generate -r certificate
    fi
    if ! is_set NSX_GATEWAY_NETWORK_INTERFACE; then
        echo "NSX_GATEWAY_NETWORK_INTERFACE not set not configuring routes"
        return
    fi

    if ! is_set NSX_GATEWAY_NETWORK_CIDR; then
        NSX_GATEWAY_NETWORK_CIDR=$PUBLIC_NETWORK_GATEWAY/${FLOATING_RANGE#*/}
        echo "The IP address to set on $PUBLIC_BRIDGE was not specified. "
        echo "Defaulting to $NSX_GATEWAY_NETWORK_CIDR"
    fi
    # Make sure the interface is up, but not configured
    sudo ip link set $NSX_GATEWAY_NETWORK_INTERFACE up
    # Save and then flush the IP addresses on the interface
    addresses=$(ip addr show dev $NSX_GATEWAY_NETWORK_INTERFACE | grep inet | awk {'print $2'})
    sudo ip addr flush $NSX_GATEWAY_NETWORK_INTERFACE
    # Use the PUBLIC Bridge to route traffic to the NSX gateway
    # NOTE(armando-migliaccio): if running in a nested environment this will work
    # only with mac learning enabled, portsecurity and security profiles disabled
    # The public bridge might not exist for the NSX plugin if Q_USE_DEBUG_COMMAND is off
    # Try to create it anyway
    sudo ovs-vsctl --may-exist add-br $PUBLIC_BRIDGE
    sudo ovs-vsctl --may-exist add-port $PUBLIC_BRIDGE $NSX_GATEWAY_NETWORK_INTERFACE
    # Flush all existing addresses on public bridge
    sudo ip addr flush dev $PUBLIC_BRIDGE
    nsx_gw_net_if_mac=$(ip link show $NSX_GATEWAY_NETWORK_INTERFACE | awk '/ether/ {print $2}')
    sudo ip link set address $nsx_gw_net_if_mac dev $PUBLIC_BRIDGE
    for address in $addresses; do
        sudo ip addr add dev $PUBLIC_BRIDGE $address
    done
    sudo ip addr add dev $PUBLIC_BRIDGE $NSX_GATEWAY_NETWORK_CIDR
    sudo ip link set $PUBLIC_BRIDGE up
}

function stop_vmware_nsx_v3 {
    # Clean client certificate if exists
    nsxadmin -o clean -r certificate

    if ! is_set NSX_GATEWAY_NETWORK_INTERFACE; then
        echo "NSX_GATEWAY_NETWORK_INTERFACE was not configured."
        return
    fi

    if ! is_set NSX_GATEWAY_NETWORK_CIDR; then
        NSX_GATEWAY_NETWORK_CIDR=$PUBLIC_NETWORK_GATEWAY/${FLOATING_RANGE#*/}
        echo "The IP address expected on $PUBLIC_BRIDGE was not specified. "
        echo "Defaulting to "$NSX_GATEWAY_NETWORK_CIDR
    fi
    sudo ip addr del $NSX_GATEWAY_NETWORK_CIDR dev $PUBLIC_BRIDGE
    # Save and then flush remaining addresses on the interface
    addresses=$(ip addr show dev $PUBLIC_BRIDGE | grep inet | awk {'print $2'})
    sudo ip addr flush $PUBLIC_BRIDGE
    # Try to detach physical interface from PUBLIC_BRIDGE
    sudo ovs-vsctl del-port $NSX_GATEWAY_NETWORK_INTERFACE
    # Restore addresses on NSX_GATEWAY_NETWORK_INTERFACE
    for address in $addresses; do
        sudo ip addr add dev $NSX_GATEWAY_NETWORK_INTERFACE $address
    done
}

# Restore xtrace
$NSX_XTRACE