text: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.
   */
  
  #ifndef __LINUX_ROUTING_ROUTE_HPP__
  #define __LINUX_ROUTING_ROUTE_HPP__
  
  #include <string>
  #include <vector>
  
  #include <stout/ip.hpp>
  #include <stout/option.hpp>
  #include <stout/result.hpp>
  #include <stout/try.hpp>
  
  namespace routing {
  namespace route {
  
  // Represents a rule in the routing table (for IPv4).
  class Rule
  {
  public:
    Rule(const Option<net::IPNetwork>& _destination,
         const Option<net::IP>& _gateway,
         const std::string& _link)
      : destination_(_destination),
        gateway_(_gateway),
        link_(_link) {}
  
    const Option<net::IPNetwork>& destination() const { return destination_; }
    const Option<net::IP>& gateway() const { return gateway_; }
    const std::string& link() const { return link_; }
  
  private:
    Option<net::IPNetwork> destination_;
    Option<net::IP> gateway_;
    std::string link_;
  };
  
  
  // Returns the main routing table of this host.
  Try<std::vector<Rule>> table();
  
  
  // Returns the default gateway of this host.
  Result<net::IP> defaultGateway();
  
  } // namespace route {
  } // namespace routing {
  
  #endif // __LINUX_ROUTING_ROUTE_HPP__
  