1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
|
// --------------------------------------------------------------------------
//
// File
// Name: WinNamedPipeStream.cpp
// Purpose: I/O stream interface for Win32 named pipes
// Created: 2005/12/07
//
// --------------------------------------------------------------------------
#include "Box.h"
#ifdef WIN32
#include <unistd.h>
#include <sys/types.h>
#include <errno.h>
#include <windows.h>
#include "WinNamedPipeStream.h"
#include "ServerException.h"
#include "CommonException.h"
#include "Socket.h"
#include "MemLeakFindOn.h"
// --------------------------------------------------------------------------
//
// Function
// Name: WinNamedPipeStream::WinNamedPipeStream()
// Purpose: Constructor (create stream ready for Open() call)
// Created: 2005/12/07
//
// --------------------------------------------------------------------------
WinNamedPipeStream::WinNamedPipeStream()
: mSocketHandle(NULL),
mReadClosed(false),
mWriteClosed(false),
mIsServer(false),
mIsConnected(false)
{
}
// --------------------------------------------------------------------------
//
// Function
// Name: WinNamedPipeStream::~WinNamedPipeStream()
// Purpose: Destructor, closes stream if open
// Created: 2005/12/07
//
// --------------------------------------------------------------------------
WinNamedPipeStream::~WinNamedPipeStream()
{
if (mSocketHandle != NULL)
{
Close();
}
}
// --------------------------------------------------------------------------
//
// Function
// Name: WinNamedPipeStream::Accept(const char* Name)
// Purpose: Creates a new named pipe with the given name,
// and wait for a connection on it
// Created: 2005/12/07
//
// --------------------------------------------------------------------------
void WinNamedPipeStream::Accept(const wchar_t* pName)
{
if (mSocketHandle != NULL || mIsConnected)
{
THROW_EXCEPTION(ServerException, SocketAlreadyOpen)
}
mSocketHandle = CreateNamedPipeW(
pName, // pipe name
PIPE_ACCESS_DUPLEX, // read/write access
PIPE_TYPE_MESSAGE | // message type pipe
PIPE_READMODE_MESSAGE | // message-read mode
PIPE_WAIT, // blocking mode
1, // max. instances
4096, // output buffer size
4096, // input buffer size
NMPWAIT_USE_DEFAULT_WAIT, // client time-out
NULL); // default security attribute
if (mSocketHandle == NULL)
{
::syslog(LOG_ERR, "CreateNamedPipeW failed: %d",
GetLastError());
THROW_EXCEPTION(ServerException, SocketOpenError)
}
bool connected = ConnectNamedPipe(mSocketHandle, (LPOVERLAPPED) NULL);
if (!connected)
{
::syslog(LOG_ERR, "ConnectNamedPipe failed: %d",
GetLastError());
CloseHandle(mSocketHandle);
mSocketHandle = NULL;
THROW_EXCEPTION(ServerException, SocketOpenError)
}
mReadClosed = FALSE;
mWriteClosed = FALSE;
mIsServer = TRUE; // must flush and disconnect before closing
mIsConnected = TRUE;
}
// --------------------------------------------------------------------------
//
// Function
// Name: WinNamedPipeStream::Connect(const char* Name)
// Purpose: Opens a connection to a listening named pipe
// Created: 2005/12/07
//
// --------------------------------------------------------------------------
void WinNamedPipeStream::Connect(const wchar_t* pName)
{
if (mSocketHandle != NULL || mIsConnected)
{
THROW_EXCEPTION(ServerException, SocketAlreadyOpen)
}
mSocketHandle = CreateFileW(
pName, // pipe name
GENERIC_READ | // read and write access
GENERIC_WRITE,
0, // no sharing
NULL, // default security attributes
OPEN_EXISTING,
0, // default attributes
NULL); // no template file
if (mSocketHandle == INVALID_HANDLE_VALUE)
{
::syslog(LOG_ERR, "Failed to connect to server's named pipe: "
"error %d", GetLastError());
THROW_EXCEPTION(ServerException, SocketOpenError)
}
mReadClosed = FALSE;
mWriteClosed = FALSE;
mIsServer = FALSE; // just close the socket
mIsConnected = TRUE;
}
// --------------------------------------------------------------------------
//
// Function
// Name: WinNamedPipeStream::Read(void *pBuffer, int NBytes)
// Purpose: Reads data from stream. Maybe returns less than asked for.
// Created: 2003/07/31
//
// --------------------------------------------------------------------------
int WinNamedPipeStream::Read(void *pBuffer, int NBytes, int Timeout)
{
// TODO no support for timeouts yet
ASSERT(Timeout == IOStream::TimeOutInfinite)
if (mSocketHandle == NULL || !mIsConnected)
{
THROW_EXCEPTION(ServerException, BadSocketHandle)
}
DWORD NumBytesRead;
bool Success = ReadFile(
mSocketHandle, // pipe handle
pBuffer, // buffer to receive reply
NBytes, // size of buffer
&NumBytesRead, // number of bytes read
NULL); // not overlapped
if (!Success)
{
THROW_EXCEPTION(ConnectionException, Conn_SocketReadError)
}
// Closed for reading at EOF?
if (NumBytesRead == 0)
{
mReadClosed = true;
}
return NumBytesRead;
}
// --------------------------------------------------------------------------
//
// Function
// Name: WinNamedPipeStream::Write(void *pBuffer, int NBytes)
// Purpose: Writes data, blocking until it's all done.
// Created: 2003/07/31
//
// --------------------------------------------------------------------------
void WinNamedPipeStream::Write(const void *pBuffer, int NBytes)
{
if (mSocketHandle == NULL || !mIsConnected)
{
THROW_EXCEPTION(ServerException, BadSocketHandle)
}
// Buffer in byte sized type.
ASSERT(sizeof(char) == 1);
const char *pByteBuffer = (char *)pBuffer;
int NumBytesWrittenTotal = 0;
while (NumBytesWrittenTotal < NBytes)
{
DWORD NumBytesWrittenThisTime = 0;
bool Success = WriteFile(
mSocketHandle, // pipe handle
pByteBuffer + NumBytesWrittenTotal, // message
NBytes - NumBytesWrittenTotal, // message length
&NumBytesWrittenThisTime, // bytes written this time
NULL); // not overlapped
if (!Success)
{
mWriteClosed = true; // assume can't write again
THROW_EXCEPTION(ConnectionException,
Conn_SocketWriteError)
}
NumBytesWrittenTotal += NumBytesWrittenThisTime;
}
}
// --------------------------------------------------------------------------
//
// Function
// Name: WinNamedPipeStream::Close()
// Purpose: Closes connection to remote socket
// Created: 2003/07/31
//
// --------------------------------------------------------------------------
void WinNamedPipeStream::Close()
{
if (mSocketHandle == NULL || !mIsConnected)
{
THROW_EXCEPTION(ServerException, BadSocketHandle)
}
if (mIsServer)
{
if (!FlushFileBuffers(mSocketHandle))
{
::syslog(LOG_INFO, "FlushFileBuffers failed: %d",
GetLastError());
}
if (!DisconnectNamedPipe(mSocketHandle))
{
::syslog(LOG_ERR, "DisconnectNamedPipe failed: %d",
GetLastError());
}
mIsServer = false;
}
if (!CloseHandle(mSocketHandle))
{
::syslog(LOG_ERR, "CloseHandle failed: %d", GetLastError());
THROW_EXCEPTION(ServerException, SocketCloseError)
}
mSocketHandle = NULL;
mIsConnected = FALSE;
}
// --------------------------------------------------------------------------
//
// Function
// Name: WinNamedPipeStream::StreamDataLeft()
// Purpose: Still capable of reading data?
// Created: 2003/08/02
//
// --------------------------------------------------------------------------
bool WinNamedPipeStream::StreamDataLeft()
{
return !mReadClosed;
}
// --------------------------------------------------------------------------
//
// Function
// Name: WinNamedPipeStream::StreamClosed()
// Purpose: Connection been closed?
// Created: 2003/08/02
//
// --------------------------------------------------------------------------
bool WinNamedPipeStream::StreamClosed()
{
return mWriteClosed;
}
#endif // WIN32
|