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// Copyright (c) 2013 The Chromium 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 CHROMEOS_NETWORK_MANAGED_NETWORK_CONFIGURATION_HANDLER_H_
#define CHROMEOS_NETWORK_MANAGED_NETWORK_CONFIGURATION_HANDLER_H_
#include <string>
#include "base/basictypes.h"
#include "base/callback.h"
#include "base/compiler_specific.h"
#include "base/observer_list.h"
#include "chromeos/chromeos_export.h"
#include "chromeos/network/network_handler.h"
#include "chromeos/network/network_handler_callbacks.h"
#include "components/onc/onc_constants.h"
namespace base {
class DictionaryValue;
class ListValue;
}
namespace chromeos {
class NetworkPolicyObserver;
// The ManagedNetworkConfigurationHandler class is used to create and configure
// networks in ChromeOS using ONC and takes care of network policies.
//
// Its interface exposes only ONC and should decouple users from Shill.
// Internally it translates ONC to Shill dictionaries and calls through to the
// NetworkConfigurationHandler.
//
// For accessing lists of visible networks, and other state information, see the
// class NetworkStateHandler.
//
// This is a singleton and its lifetime is managed by the Chrome startup code.
//
// Network configurations are referred to by Shill's service path. These
// identifiers should at most be used to also access network state using the
// NetworkStateHandler, but dependencies to Shill should be avoided. In the
// future, we may switch to other identifiers.
//
// Note on callbacks: Because all the functions here are meant to be
// asynchronous, they all take a |callback| of some type, and an
// |error_callback|. When the operation succeeds, |callback| will be called, and
// when it doesn't, |error_callback| will be called with information about the
// error, including a symbolic name for the error and often some error message
// that is suitable for logging. None of the error message text is meant for
// user consumption.
class CHROMEOS_EXPORT ManagedNetworkConfigurationHandler {
public:
virtual ~ManagedNetworkConfigurationHandler();
virtual void AddObserver(NetworkPolicyObserver* observer) = 0;
virtual void RemoveObserver(NetworkPolicyObserver* observer) = 0;
// Provides the properties of the network with |service_path| to |callback|.
virtual void GetProperties(
const std::string& service_path,
const network_handler::DictionaryResultCallback& callback,
const network_handler::ErrorCallback& error_callback) const = 0;
// Provides the managed properties of the network with |service_path| to
// |callback|. |userhash| is only used to ensure that the user's policy is
// already applied.
virtual void GetManagedProperties(
const std::string& userhash,
const std::string& service_path,
const network_handler::DictionaryResultCallback& callback,
const network_handler::ErrorCallback& error_callback) = 0;
// Sets the user's settings of an already configured network with
// |service_path|. A network can be initially configured by calling
// CreateConfiguration or if it is managed by a policy. The given properties
// will be merged with the existing settings, and it won't clear any existing
// properties.
virtual void SetProperties(
const std::string& service_path,
const base::DictionaryValue& user_settings,
const base::Closure& callback,
const network_handler::ErrorCallback& error_callback) const = 0;
// Initially configures an unconfigured network with the given user settings
// and returns the new identifier to |callback| if successful. Fails if the
// network was already configured by a call to this function or because of a
// policy. The new configuration will be owned by user |userhash|. If
// |userhash| is empty, the new configuration will be shared.
virtual void CreateConfiguration(
const std::string& userhash,
const base::DictionaryValue& properties,
const network_handler::StringResultCallback& callback,
const network_handler::ErrorCallback& error_callback) const = 0;
// Removes the user's configuration from the network with |service_path|. The
// network may still show up in the visible networks after this, but no user
// configuration will remain. If it was managed, it will still be configured.
virtual void RemoveConfiguration(
const std::string& service_path,
const base::Closure& callback,
const network_handler::ErrorCallback& error_callback) const = 0;
// Only to be called by NetworkConfigurationUpdater or from tests. Sets
// |network_configs_onc| and |global_network_config| as the current policy of
// |userhash| and |onc_source|. The policy will be applied (not necessarily
// immediately) to Shill's profiles and enforced in future configurations
// until the policy associated with |userhash| and |onc_source| is changed
// again with this function. For device policies, |userhash| must be empty.
virtual void SetPolicy(
::onc::ONCSource onc_source,
const std::string& userhash,
const base::ListValue& network_configs_onc,
const base::DictionaryValue& global_network_config) = 0;
// Returns the user policy for user |userhash| or device policy, which has
// |guid|. If |userhash| is empty, only looks for a device policy. If such
// doesn't exist, returns NULL. Sets |onc_source| accordingly.
virtual const base::DictionaryValue* FindPolicyByGUID(
const std::string userhash,
const std::string& guid,
::onc::ONCSource* onc_source) const = 0;
// Returns the policy with |guid| for profile |profile_path|. If such
// doesn't exist, returns NULL.
virtual const base::DictionaryValue* FindPolicyByGuidAndProfile(
const std::string& guid,
const std::string& profile_path) const = 0;
private:
DISALLOW_ASSIGN(ManagedNetworkConfigurationHandler);
};
} // namespace chromeos
#endif // CHROMEOS_NETWORK_MANAGED_NETWORK_CONFIGURATION_HANDLER_H_
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