vpn-manager: Add l2tp/ipsec vpn manager

ipsec_manager.h

+// 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 _VPN_MANAGER_IPSEC_MANAGER_H_
+#define _VPN_MANAGER_IPSEC_MANAGER_H_
+
+#include <string>
+
+#include "base/scoped_ptr.h"
+#include "base/time.h"
+#include "gtest/gtest_prod.h"  // for FRIEND_TEST
+#include "vpn-manager/service_manager.h"
+
+class FilePath;
+namespace chromeos {
+class Process;
+}
+
+// Manages the ipsec daemon.  This manager orchestrates configuring and
+// launching the strongswan starter process which in turn launches the
+// appropriate IKE v1 (pluto) or IKE v2 (charon) daemon.
+class IpsecManager : public ServiceManager {
+ public:
+  IpsecManager();
+
+  // Initialize the object to control IKE version |ike_version| daemon,
+  // connecting to the give |remote_address|, with given paths to
+  // pre-shared key file |psk_file|, server certificate authority file
+  // |server_ca_file|, client key file |client_key_file|, and client
+  // certificate file |client_cert_file|.
+  bool Initialize(int ike_version,
+                  const std::string& remote_address,
+                  const std::string& psk_file,
+                  const std::string& server_ca_file,
+                  const std::string& client_key_file,
+                  const std::string& client_cert_file);
+
+  virtual bool Start();
+  virtual void Stop();
+  virtual int Poll();
+  virtual void ProcessOutput();
+  virtual bool IsChild(pid_t pid);
+
+  // Returns the stderr output file descriptor of our child process.
+  int output_fd() const { return output_fd_; }
+
+ private:
+  friend class IpsecManagerTest;
+  FRIEND_TEST(IpsecManagerTest, CreateIpsecRunDirectory);
+  FRIEND_TEST(IpsecManagerTest, PollWaitIfNotUpYet);
+  FRIEND_TEST(IpsecManagerTest, PollTimeoutWaiting);
+  FRIEND_TEST(IpsecManagerTest, PollTransitionToUp);
+  FRIEND_TEST(IpsecManagerTest, PollNothingIfRunning);
+  FRIEND_TEST(IpsecManagerTestIkeV1Psk, FormatPsk);
+  FRIEND_TEST(IpsecManagerTestIkeV1Psk, FormatStarterConfigFile);
+  FRIEND_TEST(IpsecManagerTestIkeV1Psk, GetLocalAddressForRemote);
+  FRIEND_TEST(IpsecManagerTestIkeV1Psk, Start);
+  FRIEND_TEST(IpsecManagerTestIkeV1Psk, StartStarterAlreadyRunning);
+  FRIEND_TEST(IpsecManagerTestIkeV1Psk, StartStarterNotYetRunning);
+  FRIEND_TEST(IpsecManagerTestIkeV1Psk, WriteConfigFiles);
+
+  bool GetLocalAddressForRemote(const std::string& remote_address_text,
+                                std::string* local_address_text);
+  bool FormatPsk(const FilePath& input_file, std::string* formatted);
+  void KillCurrentlyRunning();
+  bool WriteConfigFiles();
+  bool CreateIpsecRunDirectory();
+  std::string FormatStarterConfigFile();
+  bool StartStarter();
+  bool SetIpsecGroup(const FilePath& file_path);
+
+  // for testing, always return this value from GetLocalAddressForRemote.
+  const char* force_local_address_;
+  // ipsec daemon stderr pipe file descriptor.
+  int output_fd_;
+  // IKE key exchange version to use.
+  int ike_version_;
+  // Group id of the "ipsec" group on this machine.  This is the group
+  // that we expect the underlying IKE daemons to run as.
+  gid_t ipsec_group_;
+  // Writeable directory to which we can write configuration files for
+  // ipsec daemons.
+  std::string stateful_container_;
+  // Directory containing run files for ipsec that we create with
+  // permissions locked to ipsec group.
+  std::string ipsec_run_path_;
+  // File whose existence signifies ipsec is now up.
+  std::string ipsec_up_file_;
+  // String with which to prefix ipsec output log lines.
+  std::string ipsec_prefix_;
+  // File containing starter process's process id.
+  std::string starter_pid_file_;
+  // Remote IP of IPsec connection.
+  std::string remote_address_;
+  // File containing the IPsec pre-shared key.
+  std::string psk_file_;
+  // File containing the server certificate authority.
+  std::string server_ca_file_;
+  // File containing the client private key.
+  std::string client_key_file_;
+  // File containing the client certificate.
+  std::string client_cert_file_;
+  // Last partial line read from output_fd_.
+  std::string partial_output_line_;
+  // Time when ipsec was started.
+  base::TimeTicks start_ticks_;
+  // IPsec starter process.
+  scoped_ptr<chromeos::Process> starter_;
+};
+
+#endif  // _VPN_MANAGER_IPSEC_MANAGER_H_