ipc/unix_domain_socket_util_unittest.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include <sys/socket.h>
   6
   7 #include "base/bind.h"
   8 #include "base/files/file_path.h"
   9 #include "base/path_service.h"
  10 #include "base/posix/eintr_wrapper.h"
  11 #include "base/synchronization/waitable_event.h"
  12 #include "base/threading/thread.h"
  13 #include "base/threading/thread_restrictions.h"
  14 #include "ipc/unix_domain_socket_util.h"
  15 #include "testing/gtest/include/gtest/gtest.h"
  16
  17 namespace {
  18
  19 class SocketAcceptor : public base::MessageLoopForIO::Watcher {
  20  public:
  21   SocketAcceptor(int fd, base::MessageLoopProxy* target_thread)
  22       : server_fd_(-1),
  23         target_thread_(target_thread),
  24         started_watching_event_(false, false),
  25         accepted_event_(false, false) {
  26     target_thread->PostTask(FROM_HERE,
  27         base::Bind(&SocketAcceptor::StartWatching, base::Unretained(this), fd));
  28   }
  29
  30   ~SocketAcceptor() override {
  31     Close();
  32   }
  33
  34   int server_fd() const { return server_fd_; }
  35
  36   void WaitUntilReady() {
  37     started_watching_event_.Wait();
  38   }
  39
  40   void WaitForAccept() {
  41     accepted_event_.Wait();
  42   }
  43
  44   void Close() {
  45     if (watcher_.get()) {
  46       target_thread_->PostTask(FROM_HERE,
  47           base::Bind(&SocketAcceptor::StopWatching, base::Unretained(this),
  48               watcher_.release()));
  49     }
  50   }
  51
  52  private:
  53   void StartWatching(int fd) {
  54     watcher_.reset(new base::MessageLoopForIO::FileDescriptorWatcher);
  55     base::MessageLoopForIO::current()->WatchFileDescriptor(
  56         fd, true, base::MessageLoopForIO::WATCH_READ, watcher_.get(), this);
  57     started_watching_event_.Signal();
  58   }
  59   void StopWatching(base::MessageLoopForIO::FileDescriptorWatcher* watcher) {
  60     watcher->StopWatchingFileDescriptor();
  61     delete watcher;
  62   }
  63   void OnFileCanReadWithoutBlocking(int fd) override {
  64     ASSERT_EQ(-1, server_fd_);
  65     IPC::ServerAcceptConnection(fd, &server_fd_);
  66     watcher_->StopWatchingFileDescriptor();
  67     accepted_event_.Signal();
  68   }
  69   void OnFileCanWriteWithoutBlocking(int fd) override {}
  70
  71   int server_fd_;
  72   base::MessageLoopProxy* target_thread_;
  73   scoped_ptr<base::MessageLoopForIO::FileDescriptorWatcher> watcher_;
  74   base::WaitableEvent started_watching_event_;
  75   base::WaitableEvent accepted_event_;
  76
  77   DISALLOW_COPY_AND_ASSIGN(SocketAcceptor);
  78 };
  79
  80 const base::FilePath GetChannelDir() {
  81 #if defined(OS_ANDROID)
  82   base::FilePath tmp_dir;
  83   PathService::Get(base::DIR_CACHE, &tmp_dir);
  84   return tmp_dir;
  85 #else
  86   return base::FilePath("/var/tmp");
  87 #endif
  88 }
  89
  90 class TestUnixSocketConnection {
  91  public:
  92   TestUnixSocketConnection()
  93       : worker_("WorkerThread"),
  94         server_listen_fd_(-1),
  95         server_fd_(-1),
  96         client_fd_(-1) {
  97     socket_name_ = GetChannelDir().Append("TestSocket");
  98     base::Thread::Options options;
  99     options.message_loop_type = base::MessageLoop::TYPE_IO;
 100     worker_.StartWithOptions(options);
 101   }
 102
 103   bool CreateServerSocket() {
 104     IPC::CreateServerUnixDomainSocket(socket_name_, &server_listen_fd_);
 105     if (server_listen_fd_ < 0)
 106       return false;
 107     struct stat socket_stat;
 108     stat(socket_name_.value().c_str(), &socket_stat);
 109     EXPECT_TRUE(S_ISSOCK(socket_stat.st_mode));
 110     acceptor_.reset(new SocketAcceptor(server_listen_fd_,
 111                                        worker_.message_loop_proxy().get()));
 112     acceptor_->WaitUntilReady();
 113     return true;
 114   }
 115
 116   bool CreateClientSocket() {
 117     DCHECK(server_listen_fd_ >= 0);
 118     IPC::CreateClientUnixDomainSocket(socket_name_, &client_fd_);
 119     if (client_fd_ < 0)
 120       return false;
 121     acceptor_->WaitForAccept();
 122     server_fd_ = acceptor_->server_fd();
 123     return server_fd_ >= 0;
 124   }
 125
 126   virtual ~TestUnixSocketConnection() {
 127     if (client_fd_ >= 0)
 128       close(client_fd_);
 129     if (server_fd_ >= 0)
 130       close(server_fd_);
 131     if (server_listen_fd_ >= 0) {
 132       close(server_listen_fd_);
 133       unlink(socket_name_.value().c_str());
 134     }
 135   }
 136
 137   int client_fd() const { return client_fd_; }
 138   int server_fd() const { return server_fd_; }
 139
 140  private:
 141   base::Thread worker_;
 142   base::FilePath socket_name_;
 143   int server_listen_fd_;
 144   int server_fd_;
 145   int client_fd_;
 146   scoped_ptr<SocketAcceptor> acceptor_;
 147 };
 148
 149 // Ensure that IPC::CreateServerUnixDomainSocket creates a socket that
 150 // IPC::CreateClientUnixDomainSocket can successfully connect to.
 151 TEST(UnixDomainSocketUtil, Connect) {
 152   TestUnixSocketConnection connection;
 153   ASSERT_TRUE(connection.CreateServerSocket());
 154   ASSERT_TRUE(connection.CreateClientSocket());
 155 }
 156
 157 // Ensure that messages can be sent across the resulting socket.
 158 TEST(UnixDomainSocketUtil, SendReceive) {
 159   TestUnixSocketConnection connection;
 160   ASSERT_TRUE(connection.CreateServerSocket());
 161   ASSERT_TRUE(connection.CreateClientSocket());
 162
 163   const char buffer[] = "Hello, server!";
 164   size_t buf_len = sizeof(buffer);
 165   size_t sent_bytes =
 166       HANDLE_EINTR(send(connection.client_fd(), buffer, buf_len, 0));
 167   ASSERT_EQ(buf_len, sent_bytes);
 168   char recv_buf[sizeof(buffer)];
 169   size_t received_bytes =
 170       HANDLE_EINTR(recv(connection.server_fd(), recv_buf, buf_len, 0));
 171   ASSERT_EQ(buf_len, received_bytes);
 172   ASSERT_EQ(0, memcmp(recv_buf, buffer, buf_len));
 173 }
 174
 175 }  // namespace