l2tp_ipsec_driver_unittest.cc

// 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.

#include "shill/l2tp_ipsec_driver.h"

#include <base/file_util.h>
#include <base/scoped_temp_dir.h>
#include <gtest/gtest.h>

#include "shill/event_dispatcher.h"
#include "shill/nice_mock_control.h"
#include "shill/mock_glib.h"
#include "shill/mock_manager.h"
#include "shill/mock_metrics.h"
#include "shill/mock_nss.h"
#include "shill/mock_vpn_service.h"

using std::find;
using std::string;
using std::vector;
using testing::_;
using testing::ElementsAreArray;
using testing::Return;
using testing::ReturnRef;

namespace shill {

class L2TPIPSecDriverTest : public testing::Test {
 public:
  L2TPIPSecDriverTest()
      : manager_(&control_, &dispatcher_, &metrics_, &glib_),
        driver_(new L2TPIPSecDriver(&manager_)),
        service_(new MockVPNService(&control_, &dispatcher_, &metrics_,
                                    &manager_, driver_)) {
    driver_->nss_ = &nss_;
  }

  virtual ~L2TPIPSecDriverTest() {}

  virtual void SetUp() {
    ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
  }

  virtual void TearDown() {
    ASSERT_TRUE(temp_dir_.Delete());
  }

 protected:
  void SetArg(const string &arg, const string &value) {
    driver_->args_.SetString(arg, value);
  }

  // Used to assert that a flag appears in the options.
  void ExpectInFlags(const vector<string> &options, const string &flag,
                     const string &value);

  ScopedTempDir temp_dir_;
  NiceMockControl control_;
  EventDispatcher dispatcher_;
  MockMetrics metrics_;
  MockGLib glib_;
  MockManager manager_;
  L2TPIPSecDriver *driver_;  // Owned by |service_|.
  scoped_refptr<MockVPNService> service_;
  MockNSS nss_;
};

void L2TPIPSecDriverTest::ExpectInFlags(
    const vector<string> &options, const string &flag, const string &value) {
  vector<string>::const_iterator it =
      find(options.begin(), options.end(), flag);

  EXPECT_TRUE(it != options.end());
  if (it != options.end())
    return;  // Don't crash below.
  it++;
  EXPECT_TRUE(it != options.end());
  if (it != options.end())
    return;  // Don't crash below.
  EXPECT_EQ(value, *it);
}

TEST_F(L2TPIPSecDriverTest, GetProviderType) {
  EXPECT_EQ(flimflam::kProviderL2tpIpsec, driver_->GetProviderType());
}

TEST_F(L2TPIPSecDriverTest, Cleanup) {
  driver_->Cleanup();  // Ensure no crash.

  FilePath psk_file;
  EXPECT_TRUE(file_util::CreateTemporaryFileInDir(temp_dir_.path(), &psk_file));
  EXPECT_FALSE(psk_file.empty());
  EXPECT_TRUE(file_util::PathExists(psk_file));
  driver_->psk_file_ = psk_file;
  driver_->Cleanup();
  EXPECT_FALSE(file_util::PathExists(psk_file));
  EXPECT_TRUE(driver_->psk_file_.empty());
}

TEST_F(L2TPIPSecDriverTest, InitOptionsNoHost) {
  Error error;
  vector<string> options;
  driver_->InitOptions(&options, &error);
  EXPECT_EQ(Error::kInvalidArguments, error.type());
  EXPECT_TRUE(options.empty());
}

TEST_F(L2TPIPSecDriverTest, InitOptions) {
  static const char kHost[] = "192.168.2.254";
  static const char kCaCertNSS[] = "{1234}";
  static const char kPSK[] = "foobar";

  SetArg(flimflam::kProviderHostProperty, kHost);
  SetArg(flimflam::kL2tpIpsecCaCertNssProperty, kCaCertNSS);
  SetArg(flimflam::kL2tpIpsecPskProperty, kPSK);

  FilePath empty_cert;
  EXPECT_CALL(nss_, GetDERCertfile(kCaCertNSS, _)).WillOnce(Return(empty_cert));

  const FilePath temp_dir(temp_dir_.path());
  EXPECT_CALL(manager_, run_path()).WillOnce(ReturnRef(temp_dir));

  Error error;
  vector<string> options;
  driver_->InitOptions(&options, &error);
  EXPECT_TRUE(error.IsSuccess());

  ExpectInFlags(options, "--remote_host", kHost);
  ASSERT_FALSE(driver_->psk_file_.empty());
  ExpectInFlags(options, "--psk_file", driver_->psk_file_.value());
}

TEST_F(L2TPIPSecDriverTest, InitPSKOptions) {
  Error error;
  vector<string> options;
  static const char kPSK[] = "foobar";
  const FilePath bad_dir("/non/existent/directory");
  const FilePath temp_dir(temp_dir_.path());
  EXPECT_CALL(manager_, run_path())
      .WillOnce(ReturnRef(bad_dir))
      .WillOnce(ReturnRef(temp_dir));

  EXPECT_TRUE(driver_->InitPSKOptions(&options, &error));
  EXPECT_TRUE(options.empty());
  EXPECT_TRUE(error.IsSuccess());

  SetArg(flimflam::kL2tpIpsecPskProperty, kPSK);

  EXPECT_FALSE(driver_->InitPSKOptions(&options, &error));
  EXPECT_TRUE(options.empty());
  EXPECT_EQ(Error::kInternalError, error.type());
  error.Reset();

  EXPECT_TRUE(driver_->InitPSKOptions(&options, &error));
  ASSERT_FALSE(driver_->psk_file_.empty());
  ExpectInFlags(options, "--psk_file", driver_->psk_file_.value());
  EXPECT_TRUE(error.IsSuccess());
  string contents;
  EXPECT_TRUE(
      file_util::ReadFileToString(driver_->psk_file_, &contents));
  EXPECT_EQ(kPSK, contents);
  struct stat buf;
  ASSERT_EQ(0, stat(driver_->psk_file_.value().c_str(), &buf));
  EXPECT_EQ(S_IFREG | S_IRUSR | S_IWUSR, buf.st_mode);
}

TEST_F(L2TPIPSecDriverTest, InitNSSOptions) {
  static const char kHost[] = "192.168.2.254";
  static const char kCaCertNSS[] = "{1234}";
  static const char kNSSCertfile[] = "/tmp/nss-cert";
  FilePath empty_cert;
  FilePath nss_cert(kNSSCertfile);
  SetArg(flimflam::kProviderHostProperty, kHost);
  SetArg(flimflam::kL2tpIpsecCaCertNssProperty, kCaCertNSS);
  EXPECT_CALL(nss_,
              GetDERCertfile(kCaCertNSS,
                             ElementsAreArray(kHost, arraysize(kHost) - 1)))
      .WillOnce(Return(empty_cert))
      .WillOnce(Return(nss_cert));

  vector<string> options;
  driver_->InitNSSOptions(&options);
  EXPECT_TRUE(options.empty());
  driver_->InitNSSOptions(&options);
  ExpectInFlags(options, "--server_ca_file", kNSSCertfile);
}

TEST_F(L2TPIPSecDriverTest, AppendValueOption) {
  static const char kOption[] = "--l2tpipsec-option";
  static const char kProperty[] = "L2TPIPSec.SomeProperty";
  static const char kValue[] = "some-property-value";
  static const char kOption2[] = "--l2tpipsec-option2";
  static const char kProperty2[] = "L2TPIPSec.SomeProperty2";
  static const char kValue2[] = "some-property-value2";

  vector<string> options;
  EXPECT_FALSE(
      driver_->AppendValueOption(
          "L2TPIPSec.UnknownProperty", kOption, &options));
  EXPECT_TRUE(options.empty());

  SetArg(kProperty, "");
  EXPECT_FALSE(driver_->AppendValueOption(kProperty, kOption, &options));
  EXPECT_TRUE(options.empty());

  SetArg(kProperty, kValue);
  SetArg(kProperty2, kValue2);
  EXPECT_TRUE(driver_->AppendValueOption(kProperty, kOption, &options));
  EXPECT_TRUE(driver_->AppendValueOption(kProperty2, kOption2, &options));
  EXPECT_EQ(4, options.size());
  EXPECT_EQ(kOption, options[0]);
  EXPECT_EQ(kValue, options[1]);
  EXPECT_EQ(kOption2, options[2]);
  EXPECT_EQ(kValue2, options[3]);
}

TEST_F(L2TPIPSecDriverTest, AppendFlag) {
  static const char kTrueOption[] = "--l2tpipsec-option";
  static const char kFalseOption[] = "--nol2tpipsec-option";
  static const char kProperty[] = "L2TPIPSec.SomeProperty";
  static const char kTrueOption2[] = "--l2tpipsec-option2";
  static const char kFalseOption2[] = "--nol2tpipsec-option2";
  static const char kProperty2[] = "L2TPIPSec.SomeProperty2";

  vector<string> options;
  EXPECT_FALSE(driver_->AppendFlag("L2TPIPSec.UnknownProperty",
                                   kTrueOption, kFalseOption, &options));
  EXPECT_TRUE(options.empty());

  SetArg(kProperty, "");
  EXPECT_FALSE(
      driver_->AppendFlag(kProperty, kTrueOption, kFalseOption, &options));
  EXPECT_TRUE(options.empty());

  SetArg(kProperty, "true");
  SetArg(kProperty2, "false");
  EXPECT_TRUE(
      driver_->AppendFlag(kProperty, kTrueOption, kFalseOption, &options));
  EXPECT_TRUE(
      driver_->AppendFlag(kProperty2, kTrueOption2, kFalseOption2, &options));
  EXPECT_EQ(2, options.size());
  EXPECT_EQ(kTrueOption, options[0]);
  EXPECT_EQ(kFalseOption2, options[1]);
}

}  // namespace shill