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1.1 root 1: /*++
2: *
3: * VDD v1.0
4: *
5: * Copyright (c) 1991, Microsoft Corporation
6: *
7: * VDD.C - Sample VDD for NT-MVDM
8: *
9: --*/
10: #include "fax32.h"
11: #include "vddsvc.h"
12:
13:
14: USHORT Sub16CS;
15: USHORT Sub16IP;
16:
17: BOOL
18: VDDInitialize(
19: IN PVOID DllHandle,
20: IN ULONG Reason,
21: IN PCONTEXT Context OPTIONAL
22: )
23:
24: /*++
25:
26: Routine Description:
27:
28:
29: Arguments:
30:
31: DllHandle - Not Used
32:
33: Reason - Attach or Detach
34:
35: Context - Not Used
36:
37: Return Value:
38:
39: SUCCESS - TRUE
40: FAILURE - FALSE
41:
42: --*/
43:
44: {
45:
46: switch ( Reason ) {
47:
48: case DLL_PROCESS_ATTACH:
49: // Allocate VDD's local heap if needed. Check that NT FAX driver
50: // is available by opening that device.
51: //....
52: // Install user hook for callback service.
53:
54: if(!VDDInstallUserHook (DllHandle,&FAXVDDCreate, &FAXVDDTerminate,
55: &FAXVDDBlock, &FAXVDDResume))
56: OutputDebugString("FAX32: UserHook not installed\n");
57: else
58: OutputDebugString("FAX32: UserHook installed!\n");
59:
60: // UserHook # 2
61: if(!VDDInstallUserHook (DllHandle,&FAXVDDCreate, NULL,
62: NULL, &FAXVDDResume))
63: OutputDebugString("FAX32: UserHook #2 not installed\n");
64: else
65: OutputDebugString("FAX32: UserHook #2 installed!\n");
66:
67: break;
68:
69: case DLL_PROCESS_DETACH:
70: // Deallocate VDD's local heap if needed
71: // communicate to appropriate Device driver about your departure
72: //...
73: // Deinstall user hook for callback service.
74: if(!VDDDeInstallUserHook (DllHandle))
75: OutputDebugString("FAX32: UserHook not deinstalled\n");
76: else
77: OutputDebugString("FAX32: UserHook deinstalled!\n");
78:
79: break;
80: default:
81: break;
82: }
83:
84: return TRUE;
85: }
86:
87: // Sample function
88: VOID FAXVDDTerminate(USHORT usPDB)
89: {
90: USHORT uSaveCS, uSaveIP;
91:
92: OutputDebugString("FAX32: Terminate message\n");
93:
94: // VDDHostSimulate
95:
96: uSaveCS = getCS();
97: uSaveIP = getIP();
98: setCS(Sub16CS);
99: setIP(Sub16IP);
100: VDDSimulate16();
101: setCS(uSaveCS);
102: setIP(uSaveIP);
103:
104: }
105:
106: // Sample function
107: VOID FAXVDDCreate(USHORT usPDB)
108: {
109: OutputDebugString("FAX32: Create Message\n");
110: }
111:
112: // Sample function
113: VOID FAXVDDBlock(VOID)
114: {
115: OutputDebugString("FAX32: Block Message\n");
116: }
117:
118: // Sample function
119: VOID FAXVDDResume(VOID)
120: {
121: OutputDebugString("FAX32: Resume Message\n");
122: }
123:
124:
125: VOID
126: FAXVDDTerminateVDM(
127: VOID
128: )
129: /*++
130:
131: Arguments:
132:
133: Return Value:
134:
135: SUCCESS - TRUE
136: FAILURE - FALSE
137:
138: --*/
139:
140:
141: {
142:
143: // Cleanup any resource taken for this vdm
144:
145:
146: return;
147: }
148:
149:
150: VOID
151: FAXVDDRegisterInit(
152: VOID
153: )
154: /*++
155:
156: Arguments:
157:
158: Return Value:
159:
160: SUCCESS - TRUE
161: FAILURE - FALSE
162:
163: --*/
164:
165:
166: {
167: // Save addresses for fax16
168: Sub16CS = getDS();
169: Sub16IP = getAX();
170:
171: OutputDebugString("FAX32: GET_ADD\n");
172:
173: // Called from the BOP manager. If VDDInitialize has done all the
174: // checking and resources alloaction, just return success.
175:
176: setCF(0);
177: return;
178: }
179:
180:
181: #define GET_A_FAX 1
182: #define SEND_A_FAX 2
183:
184: VOID
185: FAXVDDDispatch(
186: VOID
187: )
188: /*++
189:
190: Arguments:
191: Client (DX) = Command code
192: 01 - get a message from NT device driver
193: 02 - send a message through NT device driver
194: 03 - address of 16 bit routine
195:
196: Client (ES:BX) = Message Buffer
197: Client (CX) = Buffer Size
198:
199: Return Value:
200:
201: SUCCESS - Client Carry Clear and CX has the count transferred
202: FAILURE - Client Carry Set
203:
204: --*/
205:
206:
207: {
208: PCHAR Buffer;
209: USHORT cb;
210: USHORT uCom;
211: BOOL Success = TRUE; // In this sample operation always succeeds
212:
213: uCom = getDX();
214:
215: cb = getCX();
216: Buffer = (PCHAR) GetVDMPointer ((ULONG)((getES() << 16)|getBX()),cb,FALSE);
217: switch (uCom) {
218: case GET_A_FAX:
219: // Make a DeviceIOControl or ReadFile on NT FAX driver with
220: // cb and Buffer.Then set CX if success.
221:
222: if (Success) {
223: setCX(cb);
224: setCF(0);
225: }
226: else
227: setCF(1);
228:
229: break;
230:
231:
232: case SEND_A_FAX:
233: // Make a DeviceIOControl or WriteFile on NT FAX driver with
234: // cb and Buffer.Then set CX if success.
235:
236: if (Success) {
237: setCX(cb);
238: setCF(0);
239: }
240: else
241: setCF(1);
242:
243: break;
244: default:
245: setCF(1);
246: }
247: return;
248: }
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