// Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SHILL_CONNECTION_
#define SHILL_CONNECTION_

#include <string>
#include <vector>

#include <base/memory/ref_counted.h>
#include <gtest/gtest_prod.h>  // for FRIEND_TEST

#include "shill/refptr_types.h"

namespace shill {

class Resolver;
class RoutingTable;
class RTNLHandler;

// The Conneciton maintains the implemented state of an IPConfig, e.g,
// the IP address, routing table and DNS table entries.
class Connection : public base::RefCounted<Connection> {
 public:
  Connection(int interface_index, const std::string& interface_name);
  virtual ~Connection();

  // Add the contents of an IPConfig reference to the list of managed state.
  // This will replace all previous state for this address family.
  void UpdateFromIPConfig(const IPConfigRefPtr &config);

  // Sets the current connection as "default", i.e., routes and DNS entries
  // should be used by all system components that don't select explicitly.
  bool is_default() const { return is_default_; }
  void SetDefault(bool is_default);

 private:
  friend class ConnectionTest;
  FRIEND_TEST(ConnectionTest, InitState);
  FRIEND_TEST(ConnectionTest, AddConfig);
  FRIEND_TEST(ConnectionTest, AddConfigReverse);
  FRIEND_TEST(ConnectionTest, Destructor);

  static const uint32 kDefaultMetric;
  static const uint32 kNonDefaultMetric;

  bool is_default_;
  int interface_index_;
  const std::string interface_name_;
  std::vector<std::string> dns_servers_;
  std::vector<std::string> dns_domain_search_;

  // Store cached copies of singletons for speed/ease of testing
  Resolver *resolver_;
  RoutingTable *routing_table_;
  RTNLHandler *rtnl_handler_;

  DISALLOW_COPY_AND_ASSIGN(Connection);
};

}  // namespace shill

#endif  // SHILL_CONNECTION_