PPB_TCPSocket: add support for TCP server socket operations.

ppapi/tests/test_tcp_socket.cc

 // Copyright 2013 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 "ppapi/tests/test_tcp_socket.h"
 
+#include <vector>
+
+#include "ppapi/cpp/message_loop.h"
 #include "ppapi/cpp/tcp_socket.h"
 #include "ppapi/tests/test_utils.h"
 #include "ppapi/tests/testing_instance.h"
 
 namespace {
 
 // Validates the first line of an HTTP response.
 bool ValidateHttpResponse(const std::string& s) {
   // Just check that it begins with "HTTP/" and ends with a "\r\n".
   return s.size() >= 5 &&
@@ skipping 25 matching lines @@
   if (!ResolveHost(instance_->pp_instance(), host, port, &addr_))
     return false;
 
   return true;
 }
 
 void TestTCPSocket::RunTests(const std::string& filter) {
   RUN_CALLBACK_TEST(TestTCPSocket, Connect, filter);
   RUN_CALLBACK_TEST(TestTCPSocket, ReadWrite, filter);
   RUN_CALLBACK_TEST(TestTCPSocket, SetOption, filter);
+  RUN_CALLBACK_TEST(TestTCPSocket, Listen, filter);
+  RUN_CALLBACK_TEST(TestTCPSocket, Backlog, filter);
 }
 
 std::string TestTCPSocket::TestConnect() {
-  pp::TCPSocket socket(instance_);
-  TestCompletionCallback cb(instance_->pp_instance(), callback_type());
+  {
+    // The basic case.
+    pp::TCPSocket socket(instance_);
+    TestCompletionCallback cb(instance_->pp_instance(), callback_type());
 
-  cb.WaitForResult(socket.Connect(addr_, cb.GetCallback()));
-  CHECK_CALLBACK_BEHAVIOR(cb);
-  ASSERT_EQ(PP_OK, cb.result());
+    cb.WaitForResult(socket.Connect(addr_, cb.GetCallback()));
+    CHECK_CALLBACK_BEHAVIOR(cb);
+    ASSERT_EQ(PP_OK, cb.result());
 
-  pp::NetAddress local_addr, remote_addr;
-  local_addr = socket.GetLocalAddress();
-  remote_addr = socket.GetRemoteAddress();
+    pp::NetAddress local_addr, remote_addr;
+    local_addr = socket.GetLocalAddress();
+    remote_addr = socket.GetRemoteAddress();
 
-  ASSERT_NE(0, local_addr.pp_resource());
-  ASSERT_NE(0, remote_addr.pp_resource());
-  ASSERT_TRUE(EqualNetAddress(addr_, remote_addr));
+    ASSERT_NE(0, local_addr.pp_resource());
+    ASSERT_NE(0, remote_addr.pp_resource());
+    ASSERT_TRUE(EqualNetAddress(addr_, remote_addr));
 
-  socket.Close();
+    socket.Close();
+  }
+
+  {
+    // Connect a bound socket.
+    pp::TCPSocket socket(instance_);
+    TestCompletionCallback cb(instance_->pp_instance(), callback_type());
+
+    pp::NetAddress any_port_address;
+    ASSERT_SUBTEST_SUCCESS(GetAddressToBind(&any_port_address));
+
+    cb.WaitForResult(socket.Bind(any_port_address, cb.GetCallback()));
+    CHECK_CALLBACK_BEHAVIOR(cb);
+    ASSERT_EQ(PP_OK, cb.result());
+
+    cb.WaitForResult(socket.Connect(addr_, cb.GetCallback()));
+    CHECK_CALLBACK_BEHAVIOR(cb);
+    ASSERT_EQ(PP_OK, cb.result());
+
+    pp::NetAddress local_addr, remote_addr;
+    local_addr = socket.GetLocalAddress();
+    remote_addr = socket.GetRemoteAddress();
+
+    ASSERT_NE(0, local_addr.pp_resource());
+    ASSERT_NE(0, remote_addr.pp_resource());
+    ASSERT_TRUE(EqualNetAddress(addr_, remote_addr));
+    ASSERT_NE(0u, GetPort(local_addr));
+
+    socket.Close();
+  }
 
   PASS();
 }
 
 std::string TestTCPSocket::TestReadWrite() {
   pp::TCPSocket socket(instance_);
   TestCompletionCallback cb(instance_->pp_instance(), callback_type());
 
   cb.WaitForResult(socket.Connect(addr_, cb.GetCallback()));
   CHECK_CALLBACK_BEHAVIOR(cb);
   ASSERT_EQ(PP_OK, cb.result());
 
-  ASSERT_EQ(PP_OK, WriteStringToSocket(&socket, "GET / HTTP/1.0\r\n\r\n"));
+  ASSERT_SUBTEST_SUCCESS(WriteToSocket(&socket, "GET / HTTP/1.0\r\n\r\n"));
 
   // Read up to the first \n and check that it looks like valid HTTP response.
   std::string s;
-  ASSERT_EQ(PP_OK, ReadFirstLineFromSocket(&socket, &s));
+  ASSERT_SUBTEST_SUCCESS(ReadFirstLineFromSocket(&socket, &s));
   ASSERT_TRUE(ValidateHttpResponse(s));
 
   PASS();
 }
 
 std::string TestTCPSocket::TestSetOption() {
   pp::TCPSocket socket(instance_);
   TestCompletionCallback cb_1(instance_->pp_instance(), callback_type());
   TestCompletionCallback cb_2(instance_->pp_instance(), callback_type());
   TestCompletionCallback cb_3(instance_->pp_instance(), callback_type());
+  TestCompletionCallback cb_4(instance_->pp_instance(), callback_type());
 
   // These options cannot be set before the socket is connected.
   int32_t result_1 = socket.SetOption(PP_TCPSOCKET_OPTION_NO_DELAY,
                                       true, cb_1.GetCallback());
   int32_t result_2 = socket.SetOption(PP_TCPSOCKET_OPTION_SEND_BUFFER_SIZE,
                                       256, cb_2.GetCallback());
   int32_t result_3 = socket.SetOption(PP_TCPSOCKET_OPTION_RECV_BUFFER_SIZE,
                                       512, cb_3.GetCallback());
 
+  // This option can only be set before the socket is bound.
+  int32_t result_4 = socket.SetOption(PP_TCPSOCKET_OPTION_ADDRESS_REUSE,
+                                      true, cb_4.GetCallback());
+
   cb_1.WaitForResult(result_1);
   CHECK_CALLBACK_BEHAVIOR(cb_1);
   ASSERT_EQ(PP_ERROR_FAILED, cb_1.result());
 
   cb_2.WaitForResult(result_2);
   CHECK_CALLBACK_BEHAVIOR(cb_2);
   ASSERT_EQ(PP_ERROR_FAILED, cb_2.result());
 
   cb_3.WaitForResult(result_3);
   CHECK_CALLBACK_BEHAVIOR(cb_3);
   ASSERT_EQ(PP_ERROR_FAILED, cb_3.result());
 
+  cb_4.WaitForResult(result_4);
+  CHECK_CALLBACK_BEHAVIOR(cb_4);
+  ASSERT_EQ(PP_OK, cb_4.result());
+
   cb_1.WaitForResult(socket.Connect(addr_, cb_1.GetCallback()));
   CHECK_CALLBACK_BEHAVIOR(cb_1);
   ASSERT_EQ(PP_OK, cb_1.result());
 
   result_1 = socket.SetOption(PP_TCPSOCKET_OPTION_NO_DELAY,
                               false, cb_1.GetCallback());
   result_2 = socket.SetOption(PP_TCPSOCKET_OPTION_SEND_BUFFER_SIZE,
                               512, cb_2.GetCallback());
   result_3 = socket.SetOption(PP_TCPSOCKET_OPTION_RECV_BUFFER_SIZE,
                               1024, cb_3.GetCallback());
+  result_4 = socket.SetOption(PP_TCPSOCKET_OPTION_ADDRESS_REUSE,
+                              false, cb_4.GetCallback());
 
   cb_1.WaitForResult(result_1);
   CHECK_CALLBACK_BEHAVIOR(cb_1);
   ASSERT_EQ(PP_OK, cb_1.result());
 
   cb_2.WaitForResult(result_2);
   CHECK_CALLBACK_BEHAVIOR(cb_2);
   ASSERT_EQ(PP_OK, cb_2.result());
 
   cb_3.WaitForResult(result_3);
   CHECK_CALLBACK_BEHAVIOR(cb_3);
   ASSERT_EQ(PP_OK, cb_3.result());
 
-  PASS();
-}
-
-int32_t TestTCPSocket::ReadFirstLineFromSocket(pp::TCPSocket* socket,
-                                               std::string* s) {
+  cb_4.WaitForResult(result_4);
+  CHECK_CALLBACK_BEHAVIOR(cb_4);
+  ASSERT_EQ(PP_ERROR_FAILED, cb_4.result());
+
+  PASS();
+}
+
+std::string TestTCPSocket::TestListen() {
+  static const int kBacklog = 2;
+
+  pp::TCPSocket server_socket(instance_);
+  ASSERT_SUBTEST_SUCCESS(StartListen(&server_socket, kBacklog));
+
+  // We can't use a blocking callback for Accept, because it will wait forever
+  // for the client to connect, since the client connects after.
+  TestCompletionCallbackWithOutput<pp::TCPSocket>
+      accept_callback(instance_->pp_instance(), PP_REQUIRED);
+  // We need to make sure there's a message loop to run accept_callback on.
+  pp::MessageLoop current_thread_loop(pp::MessageLoop::GetCurrent());
+  if (current_thread_loop.is_null() && testing_interface_->IsOutOfProcess()) {
+    current_thread_loop = pp::MessageLoop(instance_);
+    current_thread_loop.AttachToCurrentThread();
+  }
+
+  int32_t accept_rv = server_socket.Accept(accept_callback.GetCallback());
+
+  pp::TCPSocket client_socket;
+  TestCompletionCallback callback(instance_->pp_instance(), callback_type());
+  do {
+    client_socket = pp::TCPSocket(instance_);
+
+    callback.WaitForResult(client_socket.Connect(
+        server_socket.GetLocalAddress(), callback.GetCallback()));
+  } while (callback.result() != PP_OK);
+
+  pp::NetAddress client_local_addr = client_socket.GetLocalAddress();
+  pp::NetAddress client_remote_addr = client_socket.GetRemoteAddress();
+  ASSERT_FALSE(client_local_addr.is_null());
+  ASSERT_FALSE(client_remote_addr.is_null());
+
+  accept_callback.WaitForResult(accept_rv);
+  CHECK_CALLBACK_BEHAVIOR(accept_callback);
+  ASSERT_EQ(PP_OK, accept_callback.result());
+
+  pp::TCPSocket accepted_socket(accept_callback.output());
+  pp::NetAddress accepted_local_addr = accepted_socket.GetLocalAddress();
+  pp::NetAddress accepted_remote_addr = accepted_socket.GetRemoteAddress();
+  ASSERT_FALSE(accepted_local_addr.is_null());
+  ASSERT_FALSE(accepted_remote_addr.is_null());
+
+  ASSERT_TRUE(EqualNetAddress(client_local_addr, accepted_remote_addr));
+
+  const char kSentByte = 'a';
+  ASSERT_SUBTEST_SUCCESS(WriteToSocket(&client_socket,
+                                       std::string(1, kSentByte)));
+
+  char received_byte;
+  ASSERT_SUBTEST_SUCCESS(ReadFromSocket(&accepted_socket,
+                                        &received_byte,
+                                        sizeof(received_byte)));
+  ASSERT_EQ(kSentByte, received_byte);
+
+  accepted_socket.Close();
+  client_socket.Close();
+  server_socket.Close();
+
+  PASS();
+}
+
+std::string TestTCPSocket::TestBacklog() {
+  static const size_t kBacklog = 5;
+
+  pp::TCPSocket server_socket(instance_);
+  ASSERT_SUBTEST_SUCCESS(StartListen(&server_socket, 2 * kBacklog));
+
+  std::vector<pp::TCPSocket*> client_sockets(kBacklog);
+  std::vector<TestCompletionCallback*> connect_callbacks(kBacklog);
+  std::vector<int32_t> connect_rv(kBacklog);
+  pp::NetAddress address = server_socket.GetLocalAddress();
+  for (size_t i = 0; i < kBacklog; ++i) {
+    client_sockets[i] = new pp::TCPSocket(instance_);
+    connect_callbacks[i] = new TestCompletionCallback(instance_->pp_instance(),
+                                                      callback_type());
+    connect_rv[i] = client_sockets[i]->Connect(
+        address, connect_callbacks[i]->GetCallback());
+  }
+
+  std::vector<pp::TCPSocket*> accepted_sockets(kBacklog);
+  for (size_t i = 0; i < kBacklog; ++i) {
+    TestCompletionCallbackWithOutput<pp::TCPSocket> callback(
+        instance_->pp_instance(), callback_type());
+    callback.WaitForResult(server_socket.Accept(callback.GetCallback()));
+    CHECK_CALLBACK_BEHAVIOR(callback);
+    ASSERT_EQ(PP_OK, callback.result());
+
+    accepted_sockets[i] = new pp::TCPSocket(callback.output());
+    ASSERT_FALSE(accepted_sockets[i]->is_null());
+  }
+
+  for (size_t i = 0; i < kBacklog; ++i) {
+    connect_callbacks[i]->WaitForResult(connect_rv[i]);
+    CHECK_CALLBACK_BEHAVIOR(*connect_callbacks[i]);
+    ASSERT_EQ(PP_OK, connect_callbacks[i]->result());
+  }
+
+  for (size_t i = 0; i < kBacklog; ++i) {
+    const char byte = 'a' + i;
+    ASSERT_SUBTEST_SUCCESS(WriteToSocket(client_sockets[i],
+                                         std::string(1, byte)));
+  }
+
+  bool byte_received[kBacklog] = {};
+  for (size_t i = 0; i < kBacklog; ++i) {
+    char byte;
+    ASSERT_SUBTEST_SUCCESS(ReadFromSocket(
+        accepted_sockets[i], &byte, sizeof(byte)));
+    const size_t index = byte - 'a';
+    ASSERT_GE(index, 0u);
+    ASSERT_LT(index, kBacklog);
+    ASSERT_FALSE(byte_received[index]);
+    byte_received[index] = true;
+  }
+
+  for (size_t i = 0; i < kBacklog; ++i) {
+    ASSERT_TRUE(byte_received[i]);
+
+    delete client_sockets[i];
+    delete connect_callbacks[i];
+    delete accepted_sockets[i];
+  }
+
+  PASS();
+}
+
+std::string TestTCPSocket::ReadFirstLineFromSocket(pp::TCPSocket* socket,
+                                                   std::string* s) {
   char buffer[1000];
 
   s->clear();
   // Make sure we don't just hang if |Read()| spews.
   while (s->size() < 10000) {
     TestCompletionCallback cb(instance_->pp_instance(), callback_type());
-    int32_t rv = socket->Read(buffer, sizeof(buffer), cb.GetCallback());
-    if (callback_type() == PP_REQUIRED && rv != PP_OK_COMPLETIONPENDING)
-      return PP_ERROR_FAILED;
-    cb.WaitForResult(rv);
-    if (cb.result() < 0)
-      return cb.result();
-    if (cb.result() == 0)
-      return PP_ERROR_FAILED;  // Didn't get a \n-terminated line.
+    cb.WaitForResult(socket->Read(buffer, sizeof(buffer), cb.GetCallback()));
+    CHECK_CALLBACK_BEHAVIOR(cb);
+    ASSERT_GT(cb.result(), 0);
     s->reserve(s->size() + cb.result());
-    for (int32_t i = 0; i < cb.result(); i++) {
+    for (int32_t i = 0; i < cb.result(); ++i) {
       s->push_back(buffer[i]);
       if (buffer[i] == '\n')
-        return PP_OK;
+        PASS();
     }
   }
-  return PP_ERROR_FAILED;
-}
-
-int32_t TestTCPSocket::WriteStringToSocket(pp::TCPSocket* socket,
-                                           const std::string& s) {
+  PASS();
+}
+
+std::string TestTCPSocket::ReadFromSocket(pp::TCPSocket* socket,
+                                          char* buffer,
+                                          size_t num_bytes) {
+  while (num_bytes > 0) {
+    TestCompletionCallback callback(instance_->pp_instance(), callback_type());
+    callback.WaitForResult(
+        socket->Read(buffer, num_bytes, callback.GetCallback()));
+    CHECK_CALLBACK_BEHAVIOR(callback);
+    ASSERT_GT(callback.result(), 0);
+    buffer += callback.result();
+    num_bytes -= callback.result();
+  }
+  ASSERT_EQ(0u, num_bytes);
+  PASS();
+}
+
+std::string TestTCPSocket::WriteToSocket(pp::TCPSocket* socket,
+                                         const std::string& s) {
   const char* buffer = s.data();
   size_t written = 0;
   while (written < s.size()) {
     TestCompletionCallback cb(instance_->pp_instance(), callback_type());
-    int32_t rv = socket->Write(buffer + written, s.size() - written,
-                               cb.GetCallback());
-    if (callback_type() == PP_REQUIRED && rv != PP_OK_COMPLETIONPENDING)
-      return PP_ERROR_FAILED;
-    cb.WaitForResult(rv);
-    if (cb.result() < 0)
-      return cb.result();
-    if (cb.result() == 0)
-      return PP_ERROR_FAILED;
+    cb.WaitForResult(
+        socket->Write(buffer + written, s.size() - written, cb.GetCallback()));
+    CHECK_CALLBACK_BEHAVIOR(cb);
+    ASSERT_GT(cb.result(), 0);
     written += cb.result();
   }
-  if (written != s.size())
-    return PP_ERROR_FAILED;
-  return PP_OK;
-}
+  ASSERT_EQ(written, s.size());
+  PASS();
+}
+
+std::string TestTCPSocket::GetAddressToBind(pp::NetAddress* address) {
+  pp::TCPSocket socket(instance_);
+  TestCompletionCallback callback(instance_->pp_instance(), callback_type());
+  callback.WaitForResult(socket.Connect(addr_, callback.GetCallback()));
+  CHECK_CALLBACK_BEHAVIOR(callback);
+  ASSERT_EQ(PP_OK, callback.result());
+
+  ASSERT_TRUE(ReplacePort(instance_->pp_instance(), socket.GetLocalAddress(), 0,
+                          address));
+  ASSERT_FALSE(address->is_null());
+  PASS();
+}
+
+std::string TestTCPSocket::StartListen(pp::TCPSocket* socket, int32_t backlog) {
+  pp::NetAddress any_port_address;
+  ASSERT_SUBTEST_SUCCESS(GetAddressToBind(&any_port_address));
+
+  TestCompletionCallback callback(instance_->pp_instance(), callback_type());
+  callback.WaitForResult(
+      socket->Bind(any_port_address, callback.GetCallback()));
+  CHECK_CALLBACK_BEHAVIOR(callback);
+  ASSERT_EQ(PP_OK, callback.result());
+
+  callback.WaitForResult(
+      socket->Listen(backlog, callback.GetCallback()));
+  CHECK_CALLBACK_BEHAVIOR(callback);
+  ASSERT_EQ(PP_OK, callback.result());
+
+  PASS();
+}
+