#include <stdio.h>
#include <winpr/crt.h>
#include <winpr/pipe.h>
#include <winpr/file.h>
#include <winpr/tchar.h>
#include <winpr/winpr.h>
#include <winpr/wlog.h>
#include <winpr/print.h>
#include <winpr/synch.h>
#include <winpr/thread.h>
#define PIPE_BUFFER_SIZE 32
#define PIPE_TIMEOUT_MS 20000 // 20 seconds
static BYTE SERVER_MESSAGE[PIPE_BUFFER_SIZE];
static BYTE CLIENT_MESSAGE[PIPE_BUFFER_SIZE];
static BOOL bClientSuccess = FALSE;
static BOOL bServerSuccess = FALSE;
static HANDLE serverReadyEvent;
static LPTSTR lpszPipeName = _T("\\\\.\\pipe\\winpr_test_pipe_overlapped");
static DWORD WINAPI named_pipe_client_thread(LPVOID arg)
{
DWORD status;
HANDLE hEvent = NULL;
HANDLE hNamedPipe = NULL;
BYTE* lpReadBuffer = NULL;
BOOL fSuccess = FALSE;
OVERLAPPED overlapped;
DWORD nNumberOfBytesToRead;
DWORD nNumberOfBytesToWrite;
DWORD NumberOfBytesTransferred;
status = WaitForSingleObject(serverReadyEvent, PIPE_TIMEOUT_MS);
if (status != WAIT_OBJECT_0)
{
printf("client: failed to wait for server ready event: %" PRIu32 "\n", status);
goto finish;
}
/* 1: initialize overlapped structure */
ZeroMemory(&overlapped, sizeof(OVERLAPPED));
if (!(hEvent = CreateEvent(NULL, TRUE, FALSE, NULL)))
{
printf("client: CreateEvent failure: %" PRIu32 "\n", GetLastError());
goto finish;
}
overlapped.hEvent = hEvent;
/* 2: connect to server named pipe */
hNamedPipe = CreateFile(lpszPipeName, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING,
FILE_FLAG_OVERLAPPED, NULL);
if (hNamedPipe == INVALID_HANDLE_VALUE)
{
printf("client: Named Pipe CreateFile failure: %" PRIu32 "\n", GetLastError());
goto finish;
}
/* 3: write to named pipe */
nNumberOfBytesToWrite = PIPE_BUFFER_SIZE;
NumberOfBytesTransferred = 0;
fSuccess = WriteFile(hNamedPipe, CLIENT_MESSAGE, nNumberOfBytesToWrite, NULL, &overlapped);
if (!fSuccess)
fSuccess = (GetLastError() == ERROR_IO_PENDING);
if (!fSuccess)
{
printf("client: NamedPipe WriteFile failure (initial): %" PRIu32 "\n", GetLastError());
goto finish;
}
status = WaitForSingleObject(hEvent, PIPE_TIMEOUT_MS);
if (status != WAIT_OBJECT_0)
{
printf("client: failed to wait for overlapped event (write): %" PRIu32 "\n", status);
goto finish;
}
fSuccess = GetOverlappedResult(hNamedPipe, &overlapped, &NumberOfBytesTransferred, FALSE);
if (!fSuccess)
{
printf("client: NamedPipe WriteFile failure (final): %" PRIu32 "\n", GetLastError());
goto finish;
}
printf("client: WriteFile transferred %" PRIu32 " bytes:\n", NumberOfBytesTransferred);
/* 4: read from named pipe */
if (!(lpReadBuffer = (BYTE*)calloc(1, PIPE_BUFFER_SIZE)))
{
printf("client: Error allocating read buffer\n");
goto finish;
}
nNumberOfBytesToRead = PIPE_BUFFER_SIZE;
NumberOfBytesTransferred = 0;
fSuccess = ReadFile(hNamedPipe, lpReadBuffer, nNumberOfBytesToRead, NULL, &overlapped);
if (!fSuccess)
fSuccess = (GetLastError() == ERROR_IO_PENDING);
if (!fSuccess)
{
printf("client: NamedPipe ReadFile failure (initial): %" PRIu32 "\n", GetLastError());
goto finish;
}
status = WaitForMultipleObjects(1, &hEvent, FALSE, PIPE_TIMEOUT_MS);
if (status != WAIT_OBJECT_0)
{
printf("client: failed to wait for overlapped event (read): %" PRIu32 "\n", status);
goto finish;
}
fSuccess = GetOverlappedResult(hNamedPipe, &overlapped, &NumberOfBytesTransferred, TRUE);
if (!fSuccess)
{
printf("client: NamedPipe ReadFile failure (final): %" PRIu32 "\n", GetLastError());
goto finish;
}
printf("client: ReadFile transferred %" PRIu32 " bytes:\n", NumberOfBytesTransferred);
winpr_HexDump("pipe.test", WLOG_DEBUG, lpReadBuffer, NumberOfBytesTransferred);
if (NumberOfBytesTransferred != PIPE_BUFFER_SIZE ||
memcmp(lpReadBuffer, SERVER_MESSAGE, PIPE_BUFFER_SIZE))
{
printf("client: received unexpected data from server\n");
goto finish;
}
printf("client: finished successfully\n");
bClientSuccess = TRUE;
finish:
free(lpReadBuffer);
if (hNamedPipe)
CloseHandle(hNamedPipe);
if (hEvent)
CloseHandle(hEvent);
return 0;
}
static DWORD WINAPI named_pipe_server_thread(LPVOID arg)
{
DWORD status;
HANDLE hEvent = NULL;
HANDLE hNamedPipe = NULL;
BYTE* lpReadBuffer = NULL;
OVERLAPPED overlapped;
BOOL fSuccess = FALSE;
BOOL fConnected = FALSE;
DWORD nNumberOfBytesToRead;
DWORD nNumberOfBytesToWrite;
DWORD NumberOfBytesTransferred;
/* 1: initialize overlapped structure */
ZeroMemory(&overlapped, sizeof(OVERLAPPED));
if (!(hEvent = CreateEvent(NULL, TRUE, FALSE, NULL)))
{
printf("server: CreateEvent failure: %" PRIu32 "\n", GetLastError());
SetEvent(serverReadyEvent); /* unblock client thread */
goto finish;
}
overlapped.hEvent = hEvent;
/* 2: create named pipe and set ready event */
hNamedPipe =
CreateNamedPipe(lpszPipeName, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | PIPE_WAIT, PIPE_UNLIMITED_INSTANCES,
PIPE_BUFFER_SIZE, PIPE_BUFFER_SIZE, 0, NULL);
if (hNamedPipe == INVALID_HANDLE_VALUE)
{
printf("server: CreateNamedPipe failure: %" PRIu32 "\n", GetLastError());
SetEvent(serverReadyEvent); /* unblock client thread */
goto finish;
}
SetEvent(serverReadyEvent);
/* 3: connect named pipe */
#if 0
/* This sleep will most certainly cause ERROR_PIPE_CONNECTED below */
Sleep(2000);
#endif
fConnected = ConnectNamedPipe(hNamedPipe, &overlapped);
status = GetLastError();
/**
* At this point if fConnected is FALSE, we have to check GetLastError() for:
* ERROR_PIPE_CONNECTED:
* client has already connected before we have called ConnectNamedPipe.
* this is quite common depending on the timings and indicates success
* ERROR_IO_PENDING:
* Since we're using ConnectNamedPipe asynchronously here, the function returns
* immediately and this error code simply indicates that the operation is
* still in progress. Hence we have to wait for the completion event and use
* GetOverlappedResult to query the actual result of the operation (note that
* the lpNumberOfBytesTransferred parameter is undefined/useless for a
* ConnectNamedPipe operation)
*/
if (!fConnected)
fConnected = (status == ERROR_PIPE_CONNECTED);
printf("server: ConnectNamedPipe status: %" PRIu32 "\n", status);
if (!fConnected && status == ERROR_IO_PENDING)
{
DWORD dwDummy;
printf("server: waiting up to %u ms for connection ...\n", PIPE_TIMEOUT_MS);
status = WaitForSingleObject(hEvent, PIPE_TIMEOUT_MS);
if (status == WAIT_OBJECT_0)
fConnected = GetOverlappedResult(hNamedPipe, &overlapped, &dwDummy, FALSE);
else
printf("server: failed to wait for overlapped event (connect): %" PRIu32 "\n", status);
}
if (!fConnected)
{
printf("server: ConnectNamedPipe failed: %" PRIu32 "\n", status);
goto finish;
}
printf("server: named pipe successfully connected\n");
/* 4: read from named pipe */
if (!(lpReadBuffer = (BYTE*)calloc(1, PIPE_BUFFER_SIZE)))
{
printf("server: Error allocating read buffer\n");
goto finish;
}
nNumberOfBytesToRead = PIPE_BUFFER_SIZE;
NumberOfBytesTransferred = 0;
fSuccess = ReadFile(hNamedPipe, lpReadBuffer, nNumberOfBytesToRead, NULL, &overlapped);
if (!fSuccess)
fSuccess = (GetLastError() == ERROR_IO_PENDING);
if (!fSuccess)
{
printf("server: NamedPipe ReadFile failure (initial): %" PRIu32 "\n", GetLastError());
goto finish;
}
status = WaitForSingleObject(hEvent, PIPE_TIMEOUT_MS);
if (status != WAIT_OBJECT_0)
{
printf("server: failed to wait for overlapped event (read): %" PRIu32 "\n", status);
goto finish;
}
fSuccess = GetOverlappedResult(hNamedPipe, &overlapped, &NumberOfBytesTransferred, FALSE);
if (!fSuccess)
{
printf("server: NamedPipe ReadFile failure (final): %" PRIu32 "\n", GetLastError());
goto finish;
}
printf("server: ReadFile transferred %" PRIu32 " bytes:\n", NumberOfBytesTransferred);
winpr_HexDump("pipe.test", WLOG_DEBUG, lpReadBuffer, NumberOfBytesTransferred);
if (NumberOfBytesTransferred != PIPE_BUFFER_SIZE ||
memcmp(lpReadBuffer, CLIENT_MESSAGE, PIPE_BUFFER_SIZE))
{
printf("server: received unexpected data from client\n");
goto finish;
}
/* 5: write to named pipe */
nNumberOfBytesToWrite = PIPE_BUFFER_SIZE;
NumberOfBytesTransferred = 0;
fSuccess = WriteFile(hNamedPipe, SERVER_MESSAGE, nNumberOfBytesToWrite, NULL, &overlapped);
if (!fSuccess)
fSuccess = (GetLastError() == ERROR_IO_PENDING);
if (!fSuccess)
{
printf("server: NamedPipe WriteFile failure (initial): %" PRIu32 "\n", GetLastError());
goto finish;
}
status = WaitForSingleObject(hEvent, PIPE_TIMEOUT_MS);
if (status != WAIT_OBJECT_0)
{
printf("server: failed to wait for overlapped event (write): %" PRIu32 "\n", status);
goto finish;
}
fSuccess = GetOverlappedResult(hNamedPipe, &overlapped, &NumberOfBytesTransferred, FALSE);
if (!fSuccess)
{
printf("server: NamedPipe WriteFile failure (final): %" PRIu32 "\n", GetLastError());
goto finish;
}
printf("server: WriteFile transferred %" PRIu32 " bytes:\n", NumberOfBytesTransferred);
// winpr_HexDump("pipe.test", WLOG_DEBUG, lpWriteBuffer, NumberOfBytesTransferred);
bServerSuccess = TRUE;
printf("server: finished successfully\n");
finish:
CloseHandle(hNamedPipe);
CloseHandle(hEvent);
free(lpReadBuffer);
return 0;
}
int TestPipeCreateNamedPipeOverlapped(int argc, char* argv[])
{
HANDLE ClientThread;
HANDLE ServerThread;
int result = -1;
FillMemory(SERVER_MESSAGE, PIPE_BUFFER_SIZE, 0xAA);
FillMemory(CLIENT_MESSAGE, PIPE_BUFFER_SIZE, 0xBB);
if (!(serverReadyEvent = CreateEvent(NULL, TRUE, FALSE, NULL)))
{
printf("CreateEvent failed: %" PRIu32 "\n", GetLastError());
goto out;
}
if (!(ClientThread = CreateThread(NULL, 0, named_pipe_client_thread, NULL, 0, NULL)))
{
printf("CreateThread (client) failed: %" PRIu32 "\n", GetLastError());
goto out;
}
if (!(ServerThread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)named_pipe_server_thread,
NULL, 0, NULL)))
{
printf("CreateThread (server) failed: %" PRIu32 "\n", GetLastError());
goto out;
}
if (WAIT_OBJECT_0 != WaitForSingleObject(ClientThread, INFINITE))
{
printf("%s: Failed to wait for client thread: %" PRIu32 "\n", __FUNCTION__, GetLastError());
goto out;
}
if (WAIT_OBJECT_0 != WaitForSingleObject(ServerThread, INFINITE))
{
printf("%s: Failed to wait for server thread: %" PRIu32 "\n", __FUNCTION__, GetLastError());
goto out;
}
if (bClientSuccess && bServerSuccess)
result = 0;
out:
#ifndef _WIN32
if (result == 0)
{
printf("%s: Error, this test is currently expected not to succeed on this platform.\n",
__FUNCTION__);
result = -1;
}
else
{
printf("%s: This test is currently expected to fail on this platform.\n", __FUNCTION__);
result = 0;
}
#endif
return result;
}