blob: d1fd251c7322adfdf8e4cec9e8f655ce91ac5363 [file] [log] [blame]
// Copyright (c) 2012 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_RPC_TASK_
#define SHILL_RPC_TASK_
#include <map>
#include <string>
#include <vector>
#include <base/basictypes.h>
#include <base/memory/scoped_ptr.h>
namespace shill {
// Declared in the header to avoid linking unused code into shims.
static const char kRPCTaskServiceVariable[] = "SHILL_TASK_SERVICE";
static const char kRPCTaskPathVariable[] = "SHILL_TASK_PATH";
class ControlInterface;
class RPCTaskAdaptorInterface;
// TODO(petkov): Switch from delegate interface to registered callbacks
// (crosbug.com/29766).
class RPCTaskDelegate {
public:
virtual ~RPCTaskDelegate() {}
virtual void GetLogin(std::string *user, std::string *password) = 0;
virtual void Notify(const std::string &reason,
const std::map<std::string, std::string> &dict) = 0;
};
// RPC tasks are currently used by VPN drivers for communication with external
// VPN processes. The RPC task should be owned by a single owner -- its
// RPCTaskDelegate -- so no need to be reference counted.
class RPCTask {
public:
// A constructor for the RPCTask object.
RPCTask(ControlInterface *control_interface, RPCTaskDelegate *delegate);
virtual ~RPCTask();
virtual void GetLogin(std::string *user, std::string *password) const;
virtual void Notify(const std::string &reason,
const std::map<std::string, std::string> &dict);
// Returns a string that is guaranteed to uniquely identify this RPCTask
// instance.
const std::string &UniqueName() const { return unique_name_; }
// Generates environment variable strings for a child process to
// communicate back to us over RPC.
virtual std::vector<std::string> GetEnvironment() const;
std::string GetRpcIdentifier() const;
std::string GetRpcConnectionIdentifier() const;
private:
RPCTaskDelegate *delegate_;
static unsigned int serial_number_;
std::string unique_name_; // MUST be unique amongst RPC task instances
scoped_ptr<RPCTaskAdaptorInterface> adaptor_;
DISALLOW_COPY_AND_ASSIGN(RPCTask);
};
} // namespace shill
#endif // SHILL_RPC_TASK_