-
Notifications
You must be signed in to change notification settings - Fork 0
/
VirtualDevice.cpp
310 lines (259 loc) · 7.23 KB
/
VirtualDevice.cpp
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
// VirtualDevice.cpp : Implementation of CVirtualDevice
#include "stdafx.h"
#include "VirtualDevice.h"
/////////////////////////////////////////////////////////////////////////////
// CVirtualDevice
HRESULT CVirtualDevice::OnCommandPrefixChanged(IPremiseObject *pObject, VARIANT newValue)
{
ATLTRACE2("[%S]CVirtualDevice::OnCommandPrefixChanged\n", m_bstrCommandPrefix);
if (newValue.vt != VT_BSTR)
m_bstrCommandPrefix = L"unknown";
else
m_bstrCommandPrefix = newValue.bstrVal;
ATLTRACE2(" %S\n", newValue.bstrVal);
return S_OK;
}
HRESULT CVirtualDevice::OnOpenChanged(IPremiseObject *pObject, VARIANT varNewValue)
{
HRESULT hr = S_OK;
ATLTRACE2("[%S]CVirtualDevice::OnOpenChanged(0x%p, %d)\n", m_bstrCommandPrefix, pObject, varNewValue.boolVal);
ObjectLock lock(this); //protect this object from reentrancy
_ASSERTE(m_spSite.IsEqualObject(pObject));
hr = ClosePort();
_ASSERT(SUCCEEDED(hr));
if(varNewValue.boolVal != 0)
{
hr = OpenPort(NULL);
// this is normal, some other app is using a serial port
if(FAILED(hr))
pObject->SetValueEx(SVCC_NOTIFY|SVCC_DRIVER, L"Open", &CComVariant(false));
}
return S_OK;
}
//
// IPremisePort::Write
//
HRESULT CVirtualDevice::Write(const void *pv, ULONG cb, ULONG *pcbWritten)
{
HRESULT hr = S_OK;
CComQIPtr<IPremisePort> spPremisePort;
CComQIPtr<IPremiseObject> spProcessor;
ATLTRACE2("[%S]CVirtualDevice::Write\n", m_bstrCommandPrefix);
ObjectLock lock(this);
CComVariant var;
// Get the parent (CrestonProcessor)
if (m_spSite)
hr = m_spSite->get_Parent(&spProcessor);
else
return E_FAIL;
_ASSERTE(spProcessor);
if (FAILED(hr))
return hr;
// Get the Port
CComQIPtr<IPremiseObject> pPort;
FAILED_ASSERT_RETURN_HR(spProcessor->GetValue(L"Network", &var));
pPort = var.punkVal;
if(pPort != NULL)
{
//get direct port object
CComVariant var;
//ATLTRACE2(" Getting _PortInstance\n");
HRESULT hr = pPort->GetValue(L"_PortInstance", &var);
//_ASSERTE(SUCCEEDED(hr)); -- commented out because we may try this before the serial ports
//are actually initialized. We watch changes on _PortInstance, so we are OK anyways
spPremisePort = var.punkVal;
if (spPremisePort == NULL)
{
//ATLTRACE2(" spPremisePort == NULL\n");
return S_FALSE;
}
long bOpen = 0;
//ATLTRACE2(" Getting OpenStatus\n");
spPremisePort->GetOpenStatus(&bOpen);
if (bOpen)
{
// prefix + ":" + data + "\r\n" + "\0"
long cbTotal = m_bstrCommandPrefix.Length() + 1 + cb + 2 + 1;
char* pszWrite = (char*)calloc(cbTotal+1, sizeof(char)); // calloc fills with nulls
_ASSERTE(pszWrite);
if (pszWrite == NULL)
return E_FAIL;
// Write prefix to COM port
if(pcbWritten != NULL)
*pcbWritten = 0;
if (m_bstrCommandPrefix.Length() > 0)
sprintf(pszWrite, "%S:", m_bstrCommandPrefix);
// Copy pv into pszWrite ensuring there is a CRLF at the end
strncpy(pszWrite+lstrlen(pszWrite), (char*)pv, cb);
*(pszWrite+cbTotal-3) = '\r';
*(pszWrite+cbTotal-2) = '\n';
// Write the data to the COM port
ATLTRACE2("Writing %d bytes: %s\n", cbTotal, pszWrite);
hr = spPremisePort->Write(pszWrite, cbTotal-1, pcbWritten);
if (FAILED(hr))
{
free(pszWrite);
return hr;
}
strncpy(pszWrite, (char*)pv, cb);
*(pszWrite+cb) = '\0';
m_spSite->SetValueEx(SVCC_NOTIFY|SVCC_DRIVER, L"LastCommandSent", &CComVariant(pszWrite));
// if(pcbWritten != NULL)
// *pcbWritten = cb;
free(pszWrite);
}
}
// TODO: Implement NotifyClients?
//NotifyClients(L"OnWrite", (const BYTE*)pv, cb);
return S_OK;
}
//
// IPremisePort::OpenPort
//
// Don't really need to do much...
//
HRESULT CVirtualDevice::OpenPort(IPremisePortCallback* pc)
{
ATLTRACE2("[%S]CVirtualDevice::OpenPort\n", m_bstrCommandPrefix);
if(!pc)
return E_INVALIDARG;
ClosePort();
ObjectLock lock(this);
m_spCB = pc;
m_bOpen = true;
//ATLTRACE2(" m_pbOpen = TRUE\n");
m_spSite->SetValueEx(SVCC_NOTIFY|SVCC_DRIVER, L"Open", &CComVariant(m_bOpen));
m_spSite->SetValueEx(SVCC_NOTIFY|SVCC_DRIVER, L"LastCommandSent", &CComVariant(L""));
m_spSite->SetValueEx(SVCC_NOTIFY|SVCC_DRIVER, L"LastCommandReceived", &CComVariant(L""));
return S_OK;
}
//
// IPremisePort::ClosePort
//
HRESULT CVirtualDevice::ClosePort()
{
ATLTRACE2("[%S]CVirtualDevice::ClosePort\n", m_bstrCommandPrefix);
ClosePortEx(true);
return S_OK;
}
//
// IPremisePort::ClosePortEx
//
HRESULT CVirtualDevice::ClosePortEx(boolean bImmediate)
{
ATLTRACE2("[%S]CVirtualDevice::ClosePortEx\n", m_bstrCommandPrefix);
m_bOpen = FALSE;
m_spSite->SetValueEx(SVCC_NOTIFY|SVCC_DRIVER, L"Open", &CComVariant(false));
return S_OK;
}
//
// IPremisePort::GetOpenStatus
//
HRESULT CVirtualDevice::GetOpenStatus(long* pl)
{
//ATLTRACE2("CVirtualDevice::GetOpenStatus\n");
*pl = m_bOpen; //always return true
return S_OK;
}
//
// IPremisePort::GetHandle
//
HRESULT CVirtualDevice::GetHandle(long* pid)//gets a number which can uniquely identify this port
{
//ATLTRACE2("CVirtualDevice::GetHandle\n");
return S_OK;
}
//
// IPremisePort::GetDescription
//
HRESULT CVirtualDevice::GetDescription(BSTR* pbstrDesc)
{
//ATLTRACE2("CVirtualDevice::GetDescription\n");
if (pbstrDesc == NULL)
return E_POINTER;
// HACK: Not sure if this is the right "description".
m_bstrFile.CopyTo(pbstrDesc);
return S_OK;
}
//
// IPremisePort::SetCookie
//
HRESULT CVirtualDevice::SetCookie(DWORD dwCookie)
{
//ATLTRACE2("CVirtualDevice::SetCookie\n");
ObjectLock lock(this);
m_dwCookie = dwCookie;
return S_OK;
}
//
// IPremisePort::GetCookie
//
HRESULT CVirtualDevice::GetCookie(DWORD* pdwCookie)
{
//ATLTRACE2("CVirtualDevice::GetCookie\n");
if (pdwCookie == NULL)
return E_POINTER;
ObjectLock lock(this);
*pdwCookie = m_dwCookie;
return S_OK;
}
//
// IPremisePort::GetCallback
//
HRESULT CVirtualDevice::GetCallback(IPremisePortCallback** pCallback)
{
//ATLTRACE2("CVirtualDevice::GetCallback\n");
ObjectLock lock(this);
return m_spCB.CopyTo(pCallback);
}
//
// IPremisePort::SetCallback
//
HRESULT CVirtualDevice::SetCallback(IPremisePortCallback* pc)
{
//ATLTRACE2("CVirtualDevice::SetCallback\n");
ObjectLock lock(this);
m_spCB = pc;
return S_OK;
}
//
// IPremiseHandlePort::SetupPort
//
HRESULT CVirtualDevice::SetupPort(LPCOLESTR pszFile, DWORD dwDesiredAccess, DWORD dwShareMode,
DWORD dwCreationDisposition, DWORD dwFlagsAndAttributes)
{
//ATLTRACE2("CVirtualDevice::SetupPort\n");
ObjectLock lock(this);
m_bstrFile = pszFile;
return S_OK;
}
//
// IPremiseHandlePort::SetPortSpy
//
HRESULT CVirtualDevice::SetPortSpy(IUnknown* pSite)
{
//ATLTRACE2("CVirtualDevice::SetPortSpy\n");
ObjectLock lock(this);
pSite->QueryInterface(&m_spSite);
return S_OK;
}
HRESULT CVirtualDevice::OnBrokerDetach()
{
HRESULT hr = 0;
ATLTRACE2("[%S]CVirtualDevice::OnBrokerDetach\n", m_bstrCommandPrefix);
hr = ClosePort();
_ASSERT(SUCCEEDED(hr));
m_spSite->SetValueEx(SVCC_LOCAL|SVCC_NOTIFY, L"_PortInstance", &CComVariant((IUnknown*)NULL));
return S_OK;
}
HRESULT CVirtualDevice::OnBrokerAttach()
{
// this allows the driver to get to the IPremisePort
m_spSite->SetValueEx(SVCC_LOCAL|SVCC_NOTIFY, L"_PortInstance", &CComVariant(GetUnknown()));
CComVariant var;
m_spSite->GetValue(L"CommandPrefix", &var);
if (var.vt == VT_BSTR)
m_bstrCommandPrefix = var.bstrVal;
ATLTRACE2("[%S]CVirtualDevice::OnBrokerAttach\n", m_bstrCommandPrefix);
return S_OK;
}