netwerk/test/gtest/TestNamedPipeService.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "TestCommon.h"
   7 #include "gtest/gtest.h"
   8
   9 #include <windows.h>
  10
  11 #include "mozilla/Atomics.h"
  12 #include "mozilla/gtest/MozAssertions.h"
  13 #include "mozilla/Monitor.h"
  14 #include "nsNamedPipeService.h"
  15 #include "nsNetCID.h"
  16
  17 #define PIPE_NAME L"\\\\.\\pipe\\TestNPS"
  18 #define TEST_STR "Hello World"
  19
  20 using namespace mozilla;
  21
  22 /**
  23  * Unlike a monitor, an event allows a thread to wait on another thread
  24  * completing an action without regard to ordering of the wait and the notify.
  25  */
  26 class Event {
  27  public:
  28   explicit Event(const char* aName) : mMonitor(aName) {}
  29
  30   ~Event() = default;
  31
  32   void Set() {
  33     MonitorAutoLock lock(mMonitor);
  34     MOZ_ASSERT(!mSignaled);
  35     mSignaled = true;
  36     mMonitor.Notify();
  37   }
  38   void Wait() {
  39     MonitorAutoLock lock(mMonitor);
  40     while (!mSignaled) {
  41       lock.Wait();
  42     }
  43     mSignaled = false;
  44   }
  45
  46  private:
  47   Monitor mMonitor MOZ_UNANNOTATED;
  48   bool mSignaled = false;
  49 };
  50
  51 class nsNamedPipeDataObserver final : public nsINamedPipeDataObserver {
  52  public:
  53   NS_DECL_THREADSAFE_ISUPPORTS
  54   NS_DECL_NSINAMEDPIPEDATAOBSERVER
  55
  56   explicit nsNamedPipeDataObserver(HANDLE aPipe);
  57
  58   int Read(void* aBuffer, uint32_t aSize);
  59   int Write(const void* aBuffer, uint32_t aSize);
  60
  61   uint32_t Transferred() const { return mBytesTransferred; }
  62
  63  private:
  64   ~nsNamedPipeDataObserver() = default;
  65
  66   HANDLE mPipe;
  67   OVERLAPPED mOverlapped;
  68   Atomic<uint32_t> mBytesTransferred;
  69   Event mEvent;
  70 };
  71
  72 NS_IMPL_ISUPPORTS(nsNamedPipeDataObserver, nsINamedPipeDataObserver)
  73
  74 nsNamedPipeDataObserver::nsNamedPipeDataObserver(HANDLE aPipe)
  75     : mPipe(aPipe), mOverlapped(), mBytesTransferred(0), mEvent("named-pipe") {
  76   mOverlapped.hEvent = CreateEventA(nullptr, TRUE, TRUE, "named-pipe");
  77 }
  78
  79 int nsNamedPipeDataObserver::Read(void* aBuffer, uint32_t aSize) {
  80   DWORD bytesRead = 0;
  81   if (!ReadFile(mPipe, aBuffer, aSize, &bytesRead, &mOverlapped)) {
  82     switch (GetLastError()) {
  83       case ERROR_IO_PENDING: {
  84         mEvent.Wait();
  85       }
  86         if (!GetOverlappedResult(mPipe, &mOverlapped, &bytesRead, FALSE)) {
  87           ADD_FAILURE() << "GetOverlappedResult failed";
  88           return -1;
  89         }
  90         if (mBytesTransferred != bytesRead) {
  91           ADD_FAILURE() << "GetOverlappedResult mismatch";
  92           return -1;
  93         }
  94
  95         break;
  96       default:
  97         ADD_FAILURE() << "ReadFile error " << GetLastError();
  98         return -1;
  99     }
 100   } else {
 101     mEvent.Wait();
 102
 103     if (mBytesTransferred != bytesRead) {
 104       ADD_FAILURE() << "GetOverlappedResult mismatch";
 105       return -1;
 106     }
 107   }
 108
 109   mBytesTransferred = 0;
 110   return bytesRead;
 111 }
 112
 113 int nsNamedPipeDataObserver::Write(const void* aBuffer, uint32_t aSize) {
 114   DWORD bytesWritten = 0;
 115   if (!WriteFile(mPipe, aBuffer, aSize, &bytesWritten, &mOverlapped)) {
 116     switch (GetLastError()) {
 117       case ERROR_IO_PENDING: {
 118         mEvent.Wait();
 119       }
 120         if (!GetOverlappedResult(mPipe, &mOverlapped, &bytesWritten, FALSE)) {
 121           ADD_FAILURE() << "GetOverlappedResult failed";
 122           return -1;
 123         }
 124         if (mBytesTransferred != bytesWritten) {
 125           ADD_FAILURE() << "GetOverlappedResult mismatch";
 126           return -1;
 127         }
 128
 129         break;
 130       default:
 131         ADD_FAILURE() << "WriteFile error " << GetLastError();
 132         return -1;
 133     }
 134   } else {
 135     mEvent.Wait();
 136
 137     if (mBytesTransferred != bytesWritten) {
 138       ADD_FAILURE() << "GetOverlappedResult mismatch";
 139       return -1;
 140     }
 141   }
 142
 143   mBytesTransferred = 0;
 144   return bytesWritten;
 145 }
 146
 147 NS_IMETHODIMP
 148 nsNamedPipeDataObserver::OnDataAvailable(uint32_t aBytesTransferred,
 149                                          void* aOverlapped) {
 150   if (aOverlapped != &mOverlapped) {
 151     ADD_FAILURE() << "invalid overlapped object";
 152     return NS_ERROR_FAILURE;
 153   }
 154
 155   DWORD bytesTransferred = 0;
 156   BOOL ret =
 157       GetOverlappedResult(mPipe, reinterpret_cast<LPOVERLAPPED>(aOverlapped),
 158                           &bytesTransferred, FALSE);
 159
 160   if (!ret) {
 161     ADD_FAILURE() << "GetOverlappedResult failed";
 162     return NS_ERROR_FAILURE;
 163   }
 164
 165   if (bytesTransferred != aBytesTransferred) {
 166     ADD_FAILURE() << "GetOverlappedResult mismatch";
 167     return NS_ERROR_FAILURE;
 168   }
 169
 170   mBytesTransferred += aBytesTransferred;
 171   mEvent.Set();
 172
 173   return NS_OK;
 174 }
 175
 176 NS_IMETHODIMP
 177 nsNamedPipeDataObserver::OnError(uint32_t aError, void* aOverlapped) {
 178   return NS_ERROR_NOT_IMPLEMENTED;
 179 }
 180
 181 BOOL CreateAndConnectInstance(LPOVERLAPPED aOverlapped, LPHANDLE aPipe);
 182 BOOL ConnectToNewClient(HANDLE aPipe, LPOVERLAPPED aOverlapped);
 183
 184 BOOL CreateAndConnectInstance(LPOVERLAPPED aOverlapped, LPHANDLE aPipe) {
 185   // FIXME: adjust parameters
 186   *aPipe =
 187       CreateNamedPipeW(PIPE_NAME, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
 188                        PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE | PIPE_WAIT, 1,
 189                        65536, 65536, 3000, NULL);
 190
 191   if (*aPipe == INVALID_HANDLE_VALUE) {
 192     ADD_FAILURE() << "CreateNamedPipe failed " << GetLastError();
 193     return FALSE;
 194   }
 195
 196   return ConnectToNewClient(*aPipe, aOverlapped);
 197 }
 198
 199 BOOL ConnectToNewClient(HANDLE aPipe, LPOVERLAPPED aOverlapped) {
 200   if (ConnectNamedPipe(aPipe, aOverlapped)) {
 201     ADD_FAILURE()
 202         << "Unexpected, overlapped ConnectNamedPipe() always returns 0.";
 203     return FALSE;
 204   }
 205
 206   switch (GetLastError()) {
 207     case ERROR_IO_PENDING:
 208       return TRUE;
 209
 210     case ERROR_PIPE_CONNECTED:
 211       if (SetEvent(aOverlapped->hEvent)) break;
 212
 213       [[fallthrough]];
 214     default:  // error
 215       ADD_FAILURE() << "ConnectNamedPipe failed " << GetLastError();
 216       break;
 217   }
 218
 219   return FALSE;
 220 }
 221
 222 static nsresult CreateNamedPipe(LPHANDLE aServer, LPHANDLE aClient) {
 223   OVERLAPPED overlapped;
 224   overlapped.hEvent = CreateEvent(NULL, TRUE, TRUE, NULL);
 225   BOOL ret;
 226
 227   ret = CreateAndConnectInstance(&overlapped, aServer);
 228   if (!ret) {
 229     ADD_FAILURE() << "pipe server should be pending";
 230     return NS_ERROR_FAILURE;
 231   }
 232
 233   *aClient = CreateFileW(PIPE_NAME, GENERIC_READ | GENERIC_WRITE,
 234                          FILE_SHARE_READ | FILE_SHARE_WRITE, nullptr,
 235                          OPEN_EXISTING, FILE_FLAG_OVERLAPPED, nullptr);
 236
 237   if (*aClient == INVALID_HANDLE_VALUE) {
 238     ADD_FAILURE() << "Unable to create pipe client";
 239     CloseHandle(*aServer);
 240     return NS_ERROR_FAILURE;
 241   }
 242
 243   DWORD pipeMode = PIPE_READMODE_MESSAGE;
 244   if (!SetNamedPipeHandleState(*aClient, &pipeMode, nullptr, nullptr)) {
 245     ADD_FAILURE() << "SetNamedPipeHandleState error " << GetLastError();
 246     CloseHandle(*aServer);
 247     CloseHandle(*aClient);
 248     return NS_ERROR_FAILURE;
 249   }
 250
 251   WaitForSingleObjectEx(overlapped.hEvent, INFINITE, TRUE);
 252
 253   return NS_OK;
 254 }
 255
 256 TEST(TestNamedPipeService, Test)
 257 {
 258   nsCOMPtr<nsINamedPipeService> svc = net::NamedPipeService::GetOrCreate();
 259
 260   HANDLE readPipe, writePipe;
 261   nsresult rv = CreateNamedPipe(&readPipe, &writePipe);
 262   ASSERT_NS_SUCCEEDED(rv);
 263
 264   RefPtr<nsNamedPipeDataObserver> readObserver =
 265       new nsNamedPipeDataObserver(readPipe);
 266   RefPtr<nsNamedPipeDataObserver> writeObserver =
 267       new nsNamedPipeDataObserver(writePipe);
 268
 269   ASSERT_NS_SUCCEEDED(svc->AddDataObserver(readPipe, readObserver));
 270   ASSERT_NS_SUCCEEDED(svc->AddDataObserver(writePipe, writeObserver));
 271   ASSERT_EQ(std::size_t(writeObserver->Write(TEST_STR, sizeof(TEST_STR))),
 272             sizeof(TEST_STR));
 273
 274   char buffer[sizeof(TEST_STR)];
 275   ASSERT_EQ(std::size_t(readObserver->Read(buffer, sizeof(buffer))),
 276             sizeof(TEST_STR));
 277   ASSERT_STREQ(buffer, TEST_STR) << "I/O mismatch";
 278
 279   ASSERT_NS_SUCCEEDED(svc->RemoveDataObserver(readPipe, readObserver));
 280   ASSERT_NS_SUCCEEDED(svc->RemoveDataObserver(writePipe, writeObserver));
 281 }