text: # vim: tabstop=4 shiftwidth=4 softtabstop=4
  
  # Copyright 2012 OpenStack Foundation.
  # 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.
  
  # service type constants:
  CORE = "CORE"
  DUMMY = "DUMMY"
  LOADBALANCER = "LOADBALANCER"
  FIREWALL = "FIREWALL"
  VPN = "VPN"
  METERING = "METERING"
  L3_ROUTER_NAT = "L3_ROUTER_NAT"
  
  
  #maps extension alias to service type
  EXT_TO_SERVICE_MAPPING = {
      'dummy': DUMMY,
      'lbaas': LOADBALANCER,
      'fwaas': FIREWALL,
      'vpnaas': VPN,
      'metering': METERING,
      'router': L3_ROUTER_NAT
  }
  
  # TODO(salvatore-orlando): Move these (or derive them) from conf file
  ALLOWED_SERVICES = [CORE, DUMMY, LOADBALANCER, FIREWALL, VPN, METERING,
                      L3_ROUTER_NAT]
  
  COMMON_PREFIXES = {
      CORE: "",
      DUMMY: "/dummy_svc",
      LOADBALANCER: "/lb",
      FIREWALL: "/fw",
      VPN: "/vpn",
      METERING: "/metering",
      L3_ROUTER_NAT: "",
  }
  
  # Service operation status constants
  ACTIVE = "ACTIVE"
  DOWN = "DOWN"
  PENDING_CREATE = "PENDING_CREATE"
  PENDING_UPDATE = "PENDING_UPDATE"
  PENDING_DELETE = "PENDING_DELETE"
  INACTIVE = "INACTIVE"
  ERROR = "ERROR"
  
  ACTIVE_PENDING = (
      ACTIVE,
      PENDING_CREATE,
      PENDING_UPDATE
  )
  
  # FWaaS firewall rule action
  FWAAS_ALLOW = "allow"
  FWAAS_DENY = "deny"
  
  # L3 Protocol name constants
  TCP = "tcp"
  UDP = "udp"
  ICMP = "icmp"
  
  # Network Type constants
  TYPE_FLAT = 'flat'
  TYPE_GRE = 'gre'
  TYPE_LOCAL = 'local'
  TYPE_VXLAN = 'vxlan'
  TYPE_VLAN = 'vlan'
  TYPE_NONE = 'none'
  