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
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
|
/*!
* \file TcpConnection.cpp
* \author S. Eisenhauer
* \date 27.10.2011
* \brief Implementation of CTcpConnection
*/
#include <boost/bind.hpp>
#include <string.h>
#include <new>
#include <NetworkMessages.h>
#include "TcpConnection.h"
#include "CPluginExecutor.h"
#include "protocol.h"
#include "global.h"
/// static memory for connection objects
static char g_acConnections[nMAX_CONNECTIONS * sizeof(CTcpConnection)];
/// global connection container
tConnectionSet g_astActiveConnections;
/*! constructor
* \param[in] io_service reference to the io_service object
* \param[in] pxExecutor pointer to the main application
* \param[in] u8ConNum number of the connection
*/
CTcpConnection::CTcpConnection
(boost::asio::io_service& io_service , CPluginExecutor* pxExecutor , uint8_t u8ConNum)
:m_xInStream(m_xRxBuff.elems,nNETWORK_BUFFSIZE)
,m_xOutStream(m_xTxBuff.elems,nNETWORK_BUFFSIZE)
,m_xSocket(io_service),m_pxExecutor(pxExecutor)
,m_u8ConNum(u8ConNum),m_boActive(false),m_xUploadBuffer(nUPLOAD_BUFFERSIZE)
,m_i32UploadBufferUnread(0),m_boUploadActive(false)
{
DEBUG_PRINT("entry %d",m_u8ConNum);
DEBUG_PRINT("exit %d",m_u8ConNum);
}
/// destructor
CTcpConnection::~CTcpConnection(void)
{
DEBUG_PRINT("entry %d",m_u8ConNum);
DEBUG_PRINT("exit %d",m_u8ConNum);
}
/// static factory method for connections
/// \param[in] xIoService io_service object
/// \param[in] pxExecutor pointer to the main application
/// \return pointer to connection object or NULL pointer
/// \warning check returned pointer
CTcpConnection::tConnectionPtr CTcpConnection::pxCreate(boost::asio::io_service& xIoService, CPluginExecutor* pxExecutor)
{
DEBUG_PRINT("created new tcp connection");
uint8_t u8ConCount = 0;
char* pcFreeMemorySlot = &g_acConnections[ u8ConCount * sizeof(CTcpConnection) ];
tConIter xConIter(g_astActiveConnections.begin());
tConnectionPtr pstNewConnection = NULL;
// find free memory for a new connection
for(; xConIter != g_astActiveConnections.end(); ++xConIter)
{
if( reinterpret_cast<char*>( &(*xConIter) ) != pcFreeMemorySlot )
{
break;
}
u8ConCount++;
pcFreeMemorySlot = &g_acConnections[ u8ConCount * sizeof(CTcpConnection) ];
}
// if no memory is available for a new connection
if( u8ConCount >= nMAX_CONNECTIONS)
{
// return null pointer
return pstNewConnection;
}
DEBUG_PRINT("using connection %d at %#x",u8ConCount,(int) pcFreeMemorySlot);
// place a new connection object at the found address
pstNewConnection = new(pcFreeMemorySlot) CTcpConnection(xIoService,pxExecutor,u8ConCount);
// place the new connection in the container
g_astActiveConnections.insert(*pstNewConnection);
// return a pointer to the new connection object
return pstNewConnection;
}
/// return network socket
boost::asio::ip::tcp::socket& CTcpConnection::xGetSocket()
{
return m_xSocket;
}
/// async wait for a new request from the client
void CTcpConnection::vWaitForClientRequest()
{
// initialize receive buffer
memset(m_xRxBuff.elems,0,nNETWORK_BUFFSIZE);
// reset instream
m_xInStream.vReset();
// async wait, register read handler
boost::asio::async_read(
m_xSocket,
boost::asio::buffer(m_xRxBuff),
boost::asio::transfer_at_least( sizeof(tstNetworkMessageHeader) ),
boost::bind(&CTcpConnection::vReadHandler, this,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred
)
);
}
/// handle data written event
/// \param[in] err error code of the transmission
/// \param[in] bytesTransferred number of bytes transferred
void CTcpConnection::vWriteHandler(const boost::system::error_code& err, size_t bytesTransferred)
{
if(!err)
{
// DEBUG_PRINT("Transferred %d bytes",bytesTransferred);
// initialize transmit buffer
memset(m_xTxBuff.elems,0,nNETWORK_BUFFSIZE);
//reset outstream
m_xOutStream.vReset();
vUploadNextMessage();
}
else
{
DEBUG_PRINT("error: [%s]",err.message().c_str());
DEBUG_PRINT("removing from connection list %d",m_u8ConNum);
// in case of an error, remove this object from the container
g_astActiveConnections.erase(*this);
vSetActive(false);
}
}
/// handle data read event
/// \param[in] err error code of the transmission
/// \param[in] bytesTransferred number of bytes transferred
void CTcpConnection::vReadHandler(const boost::system::error_code& err, size_t bytesTransferred)
{
if(!err)
{
bool boSendResponse = true;
uint32_t u32TxMsgLen = sizeof(tstNetworkMessageHeader);
uint32_t u32Tmp;
const CNetworkDatacontainer::tstRxNetworkMessageMsg& stRxMsg
= *(reinterpret_cast<CNetworkDatacontainer::tstRxNetworkMessageMsg*>(m_xNetworkDatacontainer.pvGetVarPtr(nenNumberOfNetworkMessageTypes)));
const CNetworkDatacontainer::tstReqStartPlugin& stReqStartPlugin
= *(reinterpret_cast<CNetworkDatacontainer::tstReqStartPlugin*>(m_xNetworkDatacontainer.pvGetVarPtr(nenReqStartPlugin)));
const CNetworkDatacontainer::tstReqStopPlugin& stReqStopPlugin
= *(reinterpret_cast<CNetworkDatacontainer::tstReqStopPlugin*>(m_xNetworkDatacontainer.pvGetVarPtr(nenReqStopPlugin)));
const CNetworkDatacontainer::tstReqImportLog& stReqImportLog
= *(reinterpret_cast<CNetworkDatacontainer::tstReqImportLog*>(m_xNetworkDatacontainer.pvGetVarPtr(nenReqImportLog)));
CNetworkDatacontainer::tstRespImportLog& stRespImportLog
= *(reinterpret_cast<CNetworkDatacontainer::tstRespImportLog*>(m_xNetworkDatacontainer.pvGetVarPtr(nenRespImportLog)));
const CNetworkDatacontainer::tstReqChangeMsgData& stReqChangeMsgData
= *(reinterpret_cast<CNetworkDatacontainer::tstReqChangeMsgData*>(m_xNetworkDatacontainer.pvGetVarPtr(nenReqChangeMsgData)));
CNetworkDatacontainer::tstRespEnumerateLogs& stRespEnumerateLogs
= *(reinterpret_cast<CNetworkDatacontainer::tstRespEnumerateLogs*>(m_xNetworkDatacontainer.pvGetVarPtr(nenRespEnumerateLogs)));
CNetworkDatacontainer::tstRespEnumerateInterfaces& stRespEnumerateInterfaces
= *(reinterpret_cast<CNetworkDatacontainer::tstRespEnumerateInterfaces*>(m_xNetworkDatacontainer.pvGetVarPtr(nenRespEnumerateInterfaces)));
do
{
uint32_t u32Offset = m_xInStream.u32GetByteCount();
sxRxMsgHeader.vRead(m_xNetworkDatacontainer,m_xInStream);
if( !m_xInStream.boIsOK() )
{
tenStreamError enError;
m_xInStream.vGetError(enError);
ERROR_PRINT("network instream has error %d",enError);
break;
}
m_xInStream.vSetPosition(u32Offset);
// DEBUG_PRINT("Received %u bytes", bytesTransferred);
switch( stRxMsg.stHeader.enMessageType )
{
case nenReqEnumerateInterfaces:
DEBUG_PRINT("Received command nenReqEnumerateInterfaces");
u32Tmp = nNETWORK_DATALENGTH;
sxReqEnumerateInterfacesMessage.vRead(m_xNetworkDatacontainer,m_xInStream);
if( m_xInStream.boIsOK() )
{
memset(stRespEnumerateInterfaces.acInterfaces,0,nNETWORK_DATALENGTH);
m_pxExecutor->vGetInterfaces(
stRespEnumerateInterfaces.acInterfaces
,u32Tmp);
u32TxMsgLen += u32Tmp;
sxRespEnumerateInterfacesMessage.vWrite(m_xNetworkDatacontainer,m_xOutStream);
}
break;
case nenReqShutdown:
DEBUG_PRINT("Received command nenReqShutdown");
sxReqShutdownMessage.vRead(m_xNetworkDatacontainer,m_xInStream);
if( m_xInStream.boIsOK() )
{
m_pxExecutor->vStop();
sxRespShutdownMessage.vWrite(m_xNetworkDatacontainer,m_xOutStream);
}
break;
case nenReqStartPlugin:
DEBUG_PRINT("Received command nenReqStartPlugin");
sxReqStartPluginMessage.vRead(m_xNetworkDatacontainer,m_xInStream);
if( m_xInStream.boIsOK() )
{
m_pxExecutor->vStartPlugin(stReqStartPlugin.i32Interface
,stReqStartPlugin.acFilename);
sxRespStartPluginMessage.vWrite(m_xNetworkDatacontainer,m_xOutStream);
}
break;
case nenReqStopPlugin:
DEBUG_PRINT("Received command nenReqStopPlugin");
sxReqStopPluginMessage.vRead(m_xNetworkDatacontainer,m_xInStream);
if( m_xInStream.boIsOK() )
{
m_pxExecutor->vStopPlugin(stReqStopPlugin.i32Interface);
sxRespStopPluginMessage.vWrite(m_xNetworkDatacontainer,m_xOutStream);
}
break;
case nenReqImportLog:
DEBUG_PRINT("Received command nenReqImportLog");
// number of data bytes in transmit buffer available for string
u32Tmp = nNETWORK_DATALENGTH;
sxReqImportLogMessage.vRead(m_xNetworkDatacontainer,m_xInStream);
if( m_xInStream.boIsOK() )
{
memset(stRespImportLog.acFilename,0,nNETWORK_DATALENGTH);
m_pxExecutor->enGetLog(
stReqImportLog.acFilename
,stRespImportLog.acFilename
,u32Tmp);
u32TxMsgLen += u32Tmp;
sxRespImportLogMessage.vWrite(m_xNetworkDatacontainer,m_xOutStream);
}
break;
case nenReqChangeMsgData:
sxReqChangeMsgDataMessage.vRead(m_xNetworkDatacontainer,m_xInStream);
if( m_xInStream.boIsOK() )
{
m_pxExecutor->vChangeMsgData(stReqChangeMsgData.i32Interface
,stReqChangeMsgData.u32CanMsgId
,stReqChangeMsgData.au8Data);
sxRespChangeMsgDataMessage.vWrite(m_xNetworkDatacontainer,m_xOutStream);
}
break;
case nenReqEnumerateLogs:
DEBUG_PRINT("Received command nenReqEnumerateLogs");
sxReqEnumerateLogsMessage.vRead(m_xNetworkDatacontainer,m_xInStream);
if( m_xInStream.boIsOK() )
{
// number of data bytes in transmit buffer available for string
u32Tmp = nNETWORK_DATALENGTH;
memset(stRespEnumerateLogs.acFilenames,0,nNETWORK_DATALENGTH);
m_pxExecutor->enEnumerateLogs(stRespEnumerateLogs.acFilenames,u32Tmp);
u32TxMsgLen += u32Tmp;
sxRespEnumarateLogsMessage.vWrite(m_xNetworkDatacontainer,m_xOutStream);
}
break;
case nenRespUploadLogMsg:
// DEBUG_PRINT("Received nenRespUploadLog");
sxRespUploadLogMsgMessage.vRead(m_xNetworkDatacontainer,m_xInStream);
if( m_xInStream.boIsOK() )
{
vUploadNextMessage();
boSendResponse = false;
}
break;
default:
DEBUG_PRINT("Received unknown message type");
sxRxMsgHeader.vRead(m_xNetworkDatacontainer,m_xInStream);
if( m_xInStream.boIsOK() )
{
sxRespUnknownReqMessage.vWrite(m_xNetworkDatacontainer,m_xOutStream);
}
break;
}
if( !m_xInStream.boIsOK() )
{
tenStreamError enError;
m_xInStream.vGetError(enError);
ERROR_PRINT("network instream has error %d",enError);
}
if( boSendResponse )
{
if( m_xOutStream.boIsOK() )
{
boost::asio::async_write(
m_xSocket,
boost::asio::buffer(m_xTxBuff,m_xOutStream.u32GetByteCount()),
boost::bind(
&CTcpConnection::vWriteHandler,
this,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred
)
);
}
else
{
tenStreamError enError;
m_xOutStream.vGetError(enError);
ERROR_PRINT("network outstream has error %d",enError);
m_xOutStream.vReset();
}
}
} while ( m_xInStream.u32GetByteCount() < bytesTransferred );
vWaitForClientRequest();
}
else
{
ERROR_PRINT("error: [%s]",err.message().c_str());
DEBUG_PRINT("removing from connection list %d",m_u8ConNum);
// in case of an error, remove this object from the container
vSetActive(false);
g_astActiveConnections.erase(*this);
}
}
/*!
* \brief send the next message in the buffer over the network
*/
void CTcpConnection::vUploadNextMessage()
{
boost::lock_guard<x2e::Mutex> lock(m_xUploadBufferMutex);
if( m_boUploadActive )
{
CNetworkDatacontainer::tstReqUploadLogMsg& stReqUploadLogMsg
= *(reinterpret_cast<CNetworkDatacontainer::tstReqUploadLogMsg*>(m_xNetworkDatacontainer.pvGetVarPtr(nenReqUploadLogMsg)));
stReqUploadLogMsg.stLogMessage = m_xUploadBuffer[--m_i32UploadBufferUnread];
if( m_i32UploadBufferUnread == 0 )
{
m_boUploadActive = false;
}
// DEBUG_PRINT("%u %x %d",stLogMsg.u32MsgId,stLogMsg.au8Data[0],m_i32UploadBufferUnread);
sxReqUploadLogMsgMessage.vWrite(m_xNetworkDatacontainer,m_xOutStream);
if( m_xOutStream.boIsOK() )
{
boost::asio::async_write(
m_xSocket,
boost::asio::buffer(m_xTxBuff,m_xOutStream.u32GetByteCount()),
boost::bind(
&CTcpConnection::vWriteHandler,
this,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred
)
);
}
else
{
tenStreamError enError;
m_xOutStream.vGetError(enError);
ERROR_PRINT("network outstream has error %d",enError);
m_xOutStream.vReset();
}
}
}
/**
* \brief adds a logged message to the upload buffer and triggers start of upload
* \param[in] stLogMsg message to upload
* \warning should run in network task
*/
void CTcpConnection::vUploadLogMessage(const tstLogMessage& stLogMsg)
{
// DEBUG_PRINT("entry");
boost::lock_guard<x2e::Mutex> lock(m_xUploadBufferMutex);
m_xUploadBuffer.push_front(stLogMsg);
++m_i32UploadBufferUnread;
if( !m_boUploadActive )
{
m_boUploadActive = true;
vUploadNextMessage();
}
// DEBUG_PRINT("exit");
}
|
