// Copyright (c) 2010 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.

#include "net/socket/socks_client_socket_pool.h"

#include "base/callback.h"
#include "base/compiler_specific.h"
#include "base/time.h"
#include "net/base/mock_host_resolver.h"
#include "net/base/net_errors.h"
#include "net/base/test_completion_callback.h"
#include "net/socket/client_socket_factory.h"
#include "net/socket/client_socket_handle.h"
#include "net/socket/client_socket_pool_histograms.h"
#include "net/socket/socket_test_util.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace net {

namespace {

const int kMaxSockets = 32;
const int kMaxSocketsPerGroup = 6;

class SOCKSClientSocketPoolTest : public ClientSocketPoolTest {
 protected:
  class SOCKS5MockData {
   public:
    explicit SOCKS5MockData(bool async) {
      writes_.reset(new MockWrite[3]);
      writes_[0] = MockWrite(async, kSOCKS5GreetRequest,
                             kSOCKS5GreetRequestLength);
      writes_[1] = MockWrite(async, kSOCKS5OkRequest, kSOCKS5OkRequestLength);
      writes_[2] = MockWrite(async, 0);

      reads_.reset(new MockRead[3]);
      reads_[0] = MockRead(async, kSOCKS5GreetResponse,
                           kSOCKS5GreetResponseLength);
      reads_[1] = MockRead(async, kSOCKS5OkResponse, kSOCKS5OkResponseLength);
      reads_[2] = MockRead(async, 0);

      data_.reset(new StaticSocketDataProvider(reads_.get(), 3,
                                               writes_.get(), 3));
    }

    SocketDataProvider* data_provider() { return data_.get(); }

   private:
    scoped_ptr<StaticSocketDataProvider> data_;
    scoped_array<MockWrite> writes_;
    scoped_array<MockWrite> reads_;
  };

  SOCKSClientSocketPoolTest()
      : ignored_tcp_socket_params_(new TCPSocketParams(
            HostPortPair("proxy", 80), MEDIUM, GURL(), false)),
        tcp_histograms_(new ClientSocketPoolHistograms("MockTCP")),
        tcp_socket_pool_(new MockTCPClientSocketPool(kMaxSockets,
            kMaxSocketsPerGroup, tcp_histograms_, &tcp_client_socket_factory_)),
        ignored_socket_params_(new SOCKSSocketParams(
            ignored_tcp_socket_params_, true, HostPortPair("host", 80), MEDIUM,
            GURL())),
        socks_histograms_(new ClientSocketPoolHistograms("SOCKSUnitTest")),
        pool_(new SOCKSClientSocketPool(kMaxSockets, kMaxSocketsPerGroup,
            socks_histograms_, NULL, tcp_socket_pool_, NULL)) {
  }

  int StartRequest(const std::string& group_name, RequestPriority priority) {
    return StartRequestUsingPool(
        pool_, group_name, priority, ignored_socket_params_);
  }

  scoped_refptr<TCPSocketParams> ignored_tcp_socket_params_;
  scoped_refptr<ClientSocketPoolHistograms> tcp_histograms_;
  MockClientSocketFactory tcp_client_socket_factory_;
  scoped_refptr<MockTCPClientSocketPool> tcp_socket_pool_;

  scoped_refptr<SOCKSSocketParams> ignored_socket_params_;
  scoped_refptr<ClientSocketPoolHistograms> socks_histograms_;
  scoped_refptr<SOCKSClientSocketPool> pool_;
};

TEST_F(SOCKSClientSocketPoolTest, Simple) {
  SOCKS5MockData data(false);
  data.data_provider()->set_connect_data(MockConnect(false, 0));
  tcp_client_socket_factory_.AddSocketDataProvider(data.data_provider());

  ClientSocketHandle handle;
  int rv = handle.Init("a", ignored_socket_params_, LOW, NULL, pool_,
                       BoundNetLog());
  EXPECT_EQ(OK, rv);
  EXPECT_TRUE(handle.is_initialized());
  EXPECT_TRUE(handle.socket());
}

TEST_F(SOCKSClientSocketPoolTest, Async) {
  SOCKS5MockData data(true);
  tcp_client_socket_factory_.AddSocketDataProvider(data.data_provider());

  TestCompletionCallback callback;
  ClientSocketHandle handle;
  int rv = handle.Init("a", ignored_socket_params_, LOW, &callback, pool_,
                       BoundNetLog());
  EXPECT_EQ(ERR_IO_PENDING, rv);
  EXPECT_FALSE(handle.is_initialized());
  EXPECT_FALSE(handle.socket());

  EXPECT_EQ(OK, callback.WaitForResult());
  EXPECT_TRUE(handle.is_initialized());
  EXPECT_TRUE(handle.socket());
}

TEST_F(SOCKSClientSocketPoolTest, TCPConnectError) {
  scoped_ptr<SocketDataProvider> socket_data(new StaticSocketDataProvider());
  socket_data->set_connect_data(MockConnect(false, ERR_CONNECTION_REFUSED));
  tcp_client_socket_factory_.AddSocketDataProvider(socket_data.get());

  ClientSocketHandle handle;
  int rv = handle.Init("a", ignored_socket_params_, LOW, NULL, pool_,
                       BoundNetLog());
  EXPECT_EQ(ERR_CONNECTION_REFUSED, rv);
  EXPECT_FALSE(handle.is_initialized());
  EXPECT_FALSE(handle.socket());
}

TEST_F(SOCKSClientSocketPoolTest, AsyncTCPConnectError) {
  scoped_ptr<SocketDataProvider> socket_data(new StaticSocketDataProvider());
  socket_data->set_connect_data(MockConnect(true, ERR_CONNECTION_REFUSED));
  tcp_client_socket_factory_.AddSocketDataProvider(socket_data.get());

  TestCompletionCallback callback;
  ClientSocketHandle handle;
  int rv = handle.Init("a", ignored_socket_params_, LOW, &callback, pool_,
                       BoundNetLog());
  EXPECT_EQ(ERR_IO_PENDING, rv);
  EXPECT_FALSE(handle.is_initialized());
  EXPECT_FALSE(handle.socket());

  EXPECT_EQ(ERR_CONNECTION_REFUSED, callback.WaitForResult());
  EXPECT_FALSE(handle.is_initialized());
  EXPECT_FALSE(handle.socket());
}

TEST_F(SOCKSClientSocketPoolTest, SOCKSConnectError) {
  MockRead failed_read[] = {
    MockRead(false, 0),
  };
  scoped_ptr<SocketDataProvider> socket_data(new StaticSocketDataProvider(
        failed_read, arraysize(failed_read), NULL, 0));
  socket_data->set_connect_data(MockConnect(false, 0));
  tcp_client_socket_factory_.AddSocketDataProvider(socket_data.get());

  ClientSocketHandle handle;
  EXPECT_EQ(0, tcp_socket_pool_->release_count());
  int rv = handle.Init("a", ignored_socket_params_, LOW, NULL, pool_,
                       BoundNetLog());
  EXPECT_EQ(ERR_SOCKS_CONNECTION_FAILED, rv);
  EXPECT_FALSE(handle.is_initialized());
  EXPECT_FALSE(handle.socket());
  EXPECT_EQ(1, tcp_socket_pool_->release_count());
}

TEST_F(SOCKSClientSocketPoolTest, AsyncSOCKSConnectError) {
  MockRead failed_read[] = {
    MockRead(true, 0),
  };
  scoped_ptr<SocketDataProvider> socket_data(new StaticSocketDataProvider(
        failed_read, arraysize(failed_read), NULL, 0));
  socket_data->set_connect_data(MockConnect(false, 0));
  tcp_client_socket_factory_.AddSocketDataProvider(socket_data.get());

  TestCompletionCallback callback;
  ClientSocketHandle handle;
  EXPECT_EQ(0, tcp_socket_pool_->release_count());
  int rv = handle.Init("a", ignored_socket_params_, LOW, &callback, pool_,
                       BoundNetLog());
  EXPECT_EQ(ERR_IO_PENDING, rv);
  EXPECT_FALSE(handle.is_initialized());
  EXPECT_FALSE(handle.socket());

  EXPECT_EQ(ERR_SOCKS_CONNECTION_FAILED, callback.WaitForResult());
  EXPECT_FALSE(handle.is_initialized());
  EXPECT_FALSE(handle.socket());
  EXPECT_EQ(1, tcp_socket_pool_->release_count());
}

TEST_F(SOCKSClientSocketPoolTest, CancelDuringTCPConnect) {
  SOCKS5MockData data(false);
  tcp_client_socket_factory_.AddSocketDataProvider(data.data_provider());
  // We need two connections because the pool base lets one cancelled
  // connect job proceed for potential future use.
  SOCKS5MockData data2(false);
  tcp_client_socket_factory_.AddSocketDataProvider(data2.data_provider());

  EXPECT_EQ(0, tcp_socket_pool_->cancel_count());
  int rv = StartRequest("a", LOW);
  EXPECT_EQ(ERR_IO_PENDING, rv);

  rv = StartRequest("a", LOW);
  EXPECT_EQ(ERR_IO_PENDING, rv);

  pool_->CancelRequest("a", requests_[0]->handle());
  pool_->CancelRequest("a", requests_[1]->handle());
  // Requests in the connect phase don't actually get cancelled.
  EXPECT_EQ(0, tcp_socket_pool_->cancel_count());

  // Now wait for the TCP sockets to connect.
  MessageLoop::current()->RunAllPending();

  EXPECT_EQ(kRequestNotFound, GetOrderOfRequest(1));
  EXPECT_EQ(kRequestNotFound, GetOrderOfRequest(2));
  EXPECT_EQ(0, tcp_socket_pool_->cancel_count());
  EXPECT_EQ(2, pool_->IdleSocketCount());

  requests_[0]->handle()->Reset();
  requests_[1]->handle()->Reset();
}

TEST_F(SOCKSClientSocketPoolTest, CancelDuringSOCKSConnect) {
  SOCKS5MockData data(true);
  data.data_provider()->set_connect_data(MockConnect(false, 0));
  tcp_client_socket_factory_.AddSocketDataProvider(data.data_provider());
  // We need two connections because the pool base lets one cancelled
  // connect job proceed for potential future use.
  SOCKS5MockData data2(true);
  data2.data_provider()->set_connect_data(MockConnect(false, 0));
  tcp_client_socket_factory_.AddSocketDataProvider(data2.data_provider());

  EXPECT_EQ(0, tcp_socket_pool_->cancel_count());
  EXPECT_EQ(0, tcp_socket_pool_->release_count());
  int rv = StartRequest("a", LOW);
  EXPECT_EQ(ERR_IO_PENDING, rv);

  rv = StartRequest("a", LOW);
  EXPECT_EQ(ERR_IO_PENDING, rv);

  pool_->CancelRequest("a", requests_[0]->handle());
  pool_->CancelRequest("a", requests_[1]->handle());
  EXPECT_EQ(0, tcp_socket_pool_->cancel_count());
  // Requests in the connect phase don't actually get cancelled.
  EXPECT_EQ(0, tcp_socket_pool_->release_count());

  // Now wait for the async data to reach the SOCKS connect jobs.
  MessageLoop::current()->RunAllPending();

  EXPECT_EQ(kRequestNotFound, GetOrderOfRequest(1));
  EXPECT_EQ(kRequestNotFound, GetOrderOfRequest(2));
  EXPECT_EQ(0, tcp_socket_pool_->cancel_count());
  EXPECT_EQ(0, tcp_socket_pool_->release_count());
  EXPECT_EQ(2, pool_->IdleSocketCount());

  requests_[0]->handle()->Reset();
  requests_[1]->handle()->Reset();
}

// It would be nice to also test the timeouts in SOCKSClientSocketPool.

}  // namespace

}  // namespace net