// 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_DHCPCD_PROXY_H_
#define SHILL_DHCPCD_PROXY_H_

#include <string>

#include <base/macros.h>

#include "shill/dbus_proxies/dhcpcd.h"
#include "shill/dhcp_config.h"
#include "shill/dhcp_proxy_interface.h"

namespace shill {

class DHCPProvider;

// The DHCPCD listener is a singleton proxy that listens to signals from all
// DHCP clients and dispatches them through the DHCP provider to the appropriate
// client based on the PID.
class DHCPCDListener {
 public:
  DHCPCDListener(DBus::Connection *connection, DHCPProvider *provider);

 private:
  class Proxy : public DBus::InterfaceProxy,
                public DBus::ObjectProxy {
   public:
    Proxy(DBus::Connection *connection, DHCPProvider *provider);
    ~Proxy() override;

   private:
    void EventSignal(const DBus::SignalMessage &signal);
    void StatusChangedSignal(const DBus::SignalMessage &signal);

    DHCPProvider *provider_;

    DISALLOW_COPY_AND_ASSIGN(Proxy);
  };

  Proxy proxy_;

  DISALLOW_COPY_AND_ASSIGN(DHCPCDListener);
};

// There's a single DHCPCD proxy per DHCP client identified by its process id
// and service name |service|.
class DHCPCDProxy : public DHCPProxyInterface {
 public:
  static const char kDBusInterfaceName[];
  static const char kDBusPath[];

  DHCPCDProxy(DBus::Connection *connection, const std::string &service);

  // Inherited from DHCPProxyInterface.
  virtual void Rebind(const std::string &interface);
  virtual void Release(const std::string &interface);

 private:
  class Proxy : public org::chromium::dhcpcd_proxy,
                public DBus::ObjectProxy {
   public:
    Proxy(DBus::Connection *connection, const std::string &service);
    ~Proxy() override;

   private:
    // Signal callbacks inherited from dhcpcd_proxy. Note that these callbacks
    // are unused because signals are dispatched directly to the DHCP
    // configuration instance by the signal listener.
    void Event(
        const uint32_t &pid,
        const std::string &reason,
        const DHCPConfig::Configuration &configuration) override;
    void StatusChanged(const uint32_t &pid, const std::string &status) override;

    DISALLOW_COPY_AND_ASSIGN(Proxy);
  };

  Proxy proxy_;

  DISALLOW_COPY_AND_ASSIGN(DHCPCDProxy);
};

}  // namespace shill

#endif  // SHILL_DHCPCD_PROXY_H_