Refactor unix domain socket.

net/socket/unix_domain_server_socket_posix_unittest.cc

+// Copyright 2014 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/unix_domain_server_socket_posix.h"
+
+#include <vector>
+
+#include "base/bind.h"
+#include "base/files/file_path.h"
+#include "base/files/scoped_temp_dir.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/run_loop.h"
+#include "base/stl_util.h"
+#include "net/base/io_buffer.h"
+#include "net/base/net_errors.h"
+#include "net/base/test_completion_callback.h"
+#include "net/socket/unix_domain_client_socket_posix.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace net {
+
+namespace {
+
+const char kSocketFilename[] = "unix_domain_socket_for_testing";
+const char kInvalidSocketPath[] = "/invalid/path";
+
+bool UserCanConnectCallback(bool allow_user, uid_t uid, gid_t gid) {
+  // Here peers are running in same process. Check if they are expected.
+  EXPECT_EQ(getuid(), uid);
+  EXPECT_EQ(getgid(), gid);
+  return allow_user;
+}
+
+UnixDomainServerSocket::AuthCallback CreateAuthCallback(bool allow_user) {
+  return base::Bind(&UserCanConnectCallback, allow_user);
+}
+
+}  // namespace
+
+class UnixDomainServerSocketTest : public testing::Test {
+ protected:
+  UnixDomainServerSocketTest() {
+    EXPECT_TRUE(temp_dir_.CreateUniqueTempDir());
+    socket_path_ = temp_dir_.path().Append(kSocketFilename).value();
+  }
+
+  base::ScopedTempDir temp_dir_;
+  std::string socket_path_;
+};
+
+TEST_F(UnixDomainServerSocketTest, ListenWithInvalidPath) {
+  const bool kUseAbstractNamespace = false;
+  UnixDomainServerSocket server_socket(CreateAuthCallback(true),
+                                       kUseAbstractNamespace);
+  EXPECT_EQ(ERR_FILE_NOT_FOUND,
+            server_socket.ListenWithAddressAndPort(kInvalidSocketPath, 0, 1));
+}
+
+TEST_F(UnixDomainServerSocketTest, ListenWithInvalidPathWithAbstractNamespace) {
+  const bool kUseAbstractNamespace = true;
+  UnixDomainServerSocket server_socket(CreateAuthCallback(true),
+                                       kUseAbstractNamespace);
+#if defined(OS_ANDROID) || defined(OS_LINUX)
+  EXPECT_EQ(OK,
+            server_socket.ListenWithAddressAndPort(kInvalidSocketPath, 0, 1));
+#else
+  EXPECT_EQ(ERR_ADDRESS_INVALID,
+            server_socket.ListenWithAddressAndPort(kInvalidSocketPath, 0, 1));
+#endif
+}
+
+TEST_F(UnixDomainServerSocketTest, AcceptWithForbiddenUser) {
+  const bool kUseAbstractNamespace = false;
+
+  UnixDomainServerSocket server_socket(CreateAuthCallback(false),
+                                       kUseAbstractNamespace);
+  EXPECT_EQ(OK, server_socket.ListenWithAddressAndPort(socket_path_, 0, 1));
+
+  scoped_ptr<StreamSocket> accepted_socket;
+  TestCompletionCallback accept_callback;
+  EXPECT_EQ(ERR_IO_PENDING,
+            server_socket.Accept(&accepted_socket, accept_callback.callback()));
+  EXPECT_FALSE(accepted_socket);
+
+  UnixDomainClientSocket client_socket(socket_path_, kUseAbstractNamespace);
+  EXPECT_FALSE(client_socket.IsConnected());
+
+  // Return success first because server socket accepts it.
+  TestCompletionCallback connect_callback;
+  int rv = client_socket.Connect(connect_callback.callback());
+  if (rv == ERR_IO_PENDING)
+    rv = connect_callback.WaitForResult();

[mmenke, 2014/07/15 15:25:56]

If this case ever happens, I think the IsConnected() expectation below may (or
may not) fail.  Makes testing this a little hairier

[byungchul, 2014/07/15 17:30:45]

Sorry, I don't understand. How could IsConnect() fail?

[mmenke, 2014/07/15 17:44:41]

If in WaitForResult, the accept callback is also called, and hangs up on us.

[byungchul, 2014/07/15 18:07:01]

Even if this happens, accept_callback will not be called because of auth error.
And, even if accept_callback is called, it just sets boolean flags. So,
connect_callback.WaitForResult() which runs message loop internally doesn't
block any execution. Am I missing something?

[mmenke, 2014/07/15 19:12:57]

I'm not concerned about accept_socket not being NULL, I'm concerned about
expecting an "OK" rv and expecting "client_socket.IsConnected()" to be true,
until the runloop is run.

[byungchul, 2014/07/15 22:01:18]

Oh, now I understand what you meant. Done.

+  EXPECT_EQ(OK, rv);
+  EXPECT_TRUE(client_socket.IsConnected());
+
+  // Cannot use accept_callback.WaitForResult() because authentication error is
+  // invisible to the caller.
+  base::RunLoop().RunUntilIdle();
+  // Server disconnects the connection.
+  EXPECT_FALSE(client_socket.IsConnected());
+  // But, server didn't create the accepted socket.
+  EXPECT_FALSE(accepted_socket);
+
+  const int read_buffer_size = 10;
+  scoped_refptr<IOBuffer> read_buffer(new IOBuffer(read_buffer_size));
+  TestCompletionCallback read_callback;
+  EXPECT_EQ(0,  /* EOF */
+            client_socket.Read(read_buffer, read_buffer_size,
+                               read_callback.callback()));
+}
+
+// Normal cases including read/write are tested by UnixDomainClientSocketTest.
+
+}  // namespace net