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
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
|
//------------------------------------------------------------------------------
// <copyright file="CollaborationHelperFunctions.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
using System.Security.Permissions;
namespace System.Net.PeerToPeer.Collaboration
{
using System;
using System.Collections.ObjectModel;
using System.Runtime.InteropServices;
using System.Net.Mail;
using System.Security.Cryptography.X509Certificates;
using System.Diagnostics;
using System.Threading;
/// <summary>
/// This class contains some of the common functions needed for peer
/// collaboration
/// </summary>
internal static class CollaborationHelperFunctions
{
private static volatile bool s_Initialized;
private static object s_LockInitialized = new object();
private const short c_CollabVersion = 0x0001;
//
// Initialise windows collab. This has to be called before any collab operation
//
// <SecurityKernel Critical="True" Ring="0">
// <CallsSuppressUnmanagedCode Name="UnsafeCollabNativeMethods.PeerCollabStartup(System.Int16):System.Int32" />
// <ReferencesCritical Name="Method: PeerToPeerException.CreateFromHr(System.String,System.Int32):System.Net.PeerToPeer.PeerToPeerException" Ring="1" />
// </SecurityKernel>
[System.Security.SecurityCritical]
internal static void Initialize()
{
if (!s_Initialized){
lock (s_LockInitialized){
if (!s_Initialized){
if(!PeerToPeerOSHelper.SupportsP2P)
throw new PlatformNotSupportedException(SR.GetString(SR.P2P_NotAvailable));
int errorCode = UnsafeCollabNativeMethods.PeerCollabStartup(c_CollabVersion);
if (errorCode != 0){
Logging.P2PTraceSource.TraceEvent(TraceEventType.Error, 0, "PeerCollabStartup returned with errorcode {0}", errorCode);
throw PeerToPeerException.CreateFromHr(SR.GetString(SR.Collab_StartupFailed), errorCode);
}
s_Initialized = true;
}
}
}
}
//
// Converts Guid class to GUID structure that we can pass into native
//
internal static GUID ConvertGuidToGUID(Guid guid)
{
GUID newGuid = new GUID();
if (guid != null){
byte[] guidBytes = guid.ToByteArray();
string guidString = guid.ToString();
int startVal = 0;
int endVal = guidString.IndexOf('-');
newGuid.data1 = (uint)(Convert.ToUInt32(guidString.Substring(startVal, endVal - startVal), 16));
startVal = endVal + 1;
endVal = guidString.IndexOf('-', endVal + 1);
newGuid.data2 = (ushort)(Convert.ToUInt16(guidString.Substring(startVal, endVal - startVal), 16));
startVal = endVal + 1;
endVal = guidString.IndexOf('-', endVal + 1);
newGuid.data3 = (ushort)(Convert.ToUInt16(guidString.Substring(startVal, endVal - startVal), 16));
newGuid.data4 = guidBytes[8];
newGuid.data5 = guidBytes[9];
newGuid.data6 = guidBytes[10];
newGuid.data7 = guidBytes[11];
newGuid.data8 = guidBytes[12];
newGuid.data9 = guidBytes[13];
newGuid.data10 = guidBytes[14];
newGuid.data11 = guidBytes[15];
}
return newGuid;
}
//
// Converts native GUID structure to managed Guid class
//
internal static Guid ConvertGUIDToGuid(GUID guid)
{
byte[] bytes = new byte[8];
bytes[0] = guid.data4;
bytes[1] = guid.data5;
bytes[2] = guid.data6;
bytes[3] = guid.data7;
bytes[4] = guid.data8;
bytes[5] = guid.data9;
bytes[6] = guid.data10;
bytes[7] = guid.data11;
return new Guid((int)guid.data1, (short)guid.data2, (short)guid.data3, bytes);
}
//
// Converts native PEER_CONTACT to PeerContact class
//
// <SecurityKernel Critical="True" Ring="1">
// <ReferencesCritical Name="Method: ConvertPEER_CONTACTToPeerContact(PEER_CONTACT, Boolean):PeerContact" Ring="1" />
// </SecurityKernel>
[System.Security.SecurityCritical]
internal static PeerContact ConvertPEER_CONTACTToPeerContact(PEER_CONTACT pc)
{
return ConvertPEER_CONTACTToPeerContact(pc, false);
}
// <SecurityKernel Critical="True" Ring="0">
// <SatisfiesLinkDemand Name="Marshal.Copy(System.IntPtr,System.Byte[],System.Int32,System.Int32):System.Void" />
// <SatisfiesLinkDemand Name="SafeHandle.get_IsInvalid():System.Boolean" />
// <SatisfiesLinkDemand Name="Marshal.GetLastWin32Error():System.Int32" />
// <SatisfiesLinkDemand Name="SafeHandle.DangerousGetHandle():System.IntPtr" />
// <SatisfiesLinkDemand Name="X509Store..ctor(System.IntPtr)" />
// <SatisfiesLinkDemand Name="SafeHandle.Dispose():System.Void" />
// <CallsSuppressUnmanagedCode Name="UnsafeCollabNativeMethods.CertOpenStore(System.IntPtr,System.UInt32,System.IntPtr,System.UInt32,System.Net.PeerToPeer.Collaboration.PEER_DATA&):System.Net.PeerToPeer.Collaboration.SafeCertStore" />
// <ReferencesCritical Name="Local certHandle of type: SafeCertStore" Ring="1" />
// <ReferencesCritical Name="Method: PeerToPeerException.CreateFromHr(System.String,System.Int32):System.Net.PeerToPeer.PeerToPeerException" Ring="1" />
// <ReferencesCritical Name="Method: PeerContact..ctor()" Ring="2" />
// <ReferencesCritical Name="Method: MyContact..ctor()" Ring="3" />
// </SecurityKernel>
[System.Security.SecurityCritical]
internal static PeerContact ConvertPEER_CONTACTToPeerContact(PEER_CONTACT pc, bool isMyContact)
{
PeerContact peerContact = (isMyContact ? new MyContact(): new PeerContact());
peerContact.PeerName = new PeerName(pc.pwzPeerName);
peerContact.DisplayName = pc.pwzDisplayName;
peerContact.Nickname = pc.pwzNickname;
peerContact.EmailAddress = (pc.pwzEmailAddress != null) ? new MailAddress(pc.pwzEmailAddress) : null;
if(!isMyContact)
peerContact.SubscribeAllowed = pc.WatcherPermissions;
peerContact.IsSubscribed = (isMyContact ? true : pc.fWatch);
byte[] data = null;
if (pc.credentials.cbData != 0){
data = new byte[pc.credentials.cbData];
Marshal.Copy(pc.credentials.pbData, data, 0, (int)pc.credentials.cbData);
}
if (data != null){
SafeCertStore certHandle = UnsafeCollabNativeMethods.CertOpenStore(new IntPtr(/*CERT_STORE_PROV_PKCS7*/ 5),
0x00000001/*X509_ASN_ENCODING*/| 0x00010000/*PKCS_7_ASN_ENCODING*/,
IntPtr.Zero,
0x00000001/*CERT_STORE_NO_CRYPT_RELEASE_FLAG*/,
ref pc.credentials);
if (certHandle == null || certHandle.IsInvalid){
int win32ErrorCode = Marshal.GetLastWin32Error();
throw PeerToPeerException.CreateFromHr(SR.GetString(SR.Collab_CredentialsError), win32ErrorCode);
}
try{
X509Store certStore = new X509Store(certHandle.DangerousGetHandle());
peerContact.Credentials = new X509Certificate2(certStore.Certificates[0]);
}
finally{
if(certHandle != null) certHandle.Dispose();
}
}
return peerContact;
}
// <SecurityKernel Critical="True" Ring="0">
// <SatisfiesLinkDemand Name="SafeHandle.get_IsInvalid():System.Boolean" />
// <SatisfiesLinkDemand Name="Marshal.GetLastWin32Error():System.Int32" />
// <SatisfiesLinkDemand Name="SafeHandle.DangerousGetHandle():System.IntPtr" />
// <SatisfiesLinkDemand Name="X509Store..ctor(System.IntPtr)" />
// <SatisfiesLinkDemand Name="SafeHandle.Dispose():System.Void" />
// <CallsSuppressUnmanagedCode Name="UnsafeCollabNativeMethods.CertOpenStore(System.IntPtr,System.UInt32,System.IntPtr,System.UInt32,System.IntPtr):System.Net.PeerToPeer.Collaboration.SafeCertStore" />
// <CallsSuppressUnmanagedCode Name="UnsafeCollabNativeMethods.CertSaveStore(System.Net.PeerToPeer.Collaboration.SafeCertStore,System.UInt32,System.UInt32,System.UInt32,System.Net.PeerToPeer.Collaboration.PEER_DATA&,System.UInt32):System.Boolean" />
// <ReferencesCritical Name="Local certHandle of type: SafeCertStore" Ring="1" />
// <ReferencesCritical Name="Parameter safeCredentials of type: SafeCollabMemory" Ring="1" />
// <ReferencesCritical Name="Method: PeerToPeerException.CreateFromHr(System.String,System.Int32):System.Net.PeerToPeer.PeerToPeerException" Ring="1" />
// <ReferencesCritical Name="Method: SafeCollabMemory..ctor(System.Int32)" Ring="1" />
// </SecurityKernel>
[System.Security.SecurityCritical]
internal static PEER_CONTACT ConvertPeerContactToPEER_CONTACT(PeerContact peerContact, ref SafeCollabMemory safeCredentials)
{
PEER_CONTACT pc = new PEER_CONTACT();
pc.pwzDisplayName = peerContact.DisplayName;
pc.pwzEmailAddress = (peerContact.EmailAddress == null) ? null : peerContact.EmailAddress.ToString();
pc.pwzNickname = peerContact.Nickname;
pc.pwzPeerName = peerContact.PeerName.ToString();
pc.fWatch = peerContact.IsSubscribed;
pc.WatcherPermissions = peerContact.SubscribeAllowed;
PEER_DATA pd = new PEER_DATA();
if (peerContact.Credentials != null){
SafeCertStore certHandle = UnsafeCollabNativeMethods.CertOpenStore(new IntPtr(/*CERT_STORE_PROV_MEMORY*/ 2),
0,
IntPtr.Zero,
0x00002000/*CERT_STORE_CREATE_NEW_FLAG*/ | 0x00000001/*CERT_STORE_NO_CRYPT_RELEASE_FLAG*/,
IntPtr.Zero);
if (certHandle == null || certHandle.IsInvalid){
int win32ErrorCode = Marshal.GetLastWin32Error();
throw PeerToPeerException.CreateFromHr(SR.GetString(SR.Collab_CredentialsError), win32ErrorCode);
}
try{
X509Store certStore = new X509Store(certHandle.DangerousGetHandle());
certStore.Add(peerContact.Credentials as X509Certificate2);
bool returnCode = UnsafeCollabNativeMethods.CertSaveStore(certHandle,
0x00000001/*X509_ASN_ENCODING*/| 0x00010000/*PKCS_7_ASN_ENCODING*/,
2 /*CERT_STORE_SAVE_AS_STORE*/,
2, /*CERT_STORE_SAVE_TO_MEMORY*/
ref pd,
0);
if ((pd.cbData != 0) && (returnCode)){
safeCredentials = new SafeCollabMemory((int)pd.cbData);
pd.pbData = safeCredentials.DangerousGetHandle();
returnCode = UnsafeCollabNativeMethods.CertSaveStore(certHandle,
0x00000001/*X509_ASN_ENCODING*/| 0x00010000/*PKCS_7_ASN_ENCODING*/,
2 /*CERT_STORE_SAVE_AS_STORE*/,
2, /*CERT_STORE_SAVE_TO_MEMORY*/
ref pd,// Clean up memory from here;
0);
}
else{
pd.cbData = 0;
pd.pbData = IntPtr.Zero;
}
}
finally{
if (certHandle != null) certHandle.Dispose();
}
}
else{
pd.cbData = 0;
pd.pbData = IntPtr.Zero;
}
pc.credentials = pd;
return pc;
}
//
// Converts address bytes to a SOCKADDR_IN6 that can be passed into
// native
//
internal static void ByteArrayToSin6Addr(byte[] addrBytes, ref SOCKADDR_IN6 sin6)
{
sin6.sin6_addr0 = addrBytes[0];
sin6.sin6_addr1 = addrBytes[1];
sin6.sin6_addr2 = addrBytes[2];
sin6.sin6_addr3 = addrBytes[3];
sin6.sin6_addr4 = addrBytes[4];
sin6.sin6_addr5 = addrBytes[5];
sin6.sin6_addr6 = addrBytes[6];
sin6.sin6_addr7 = addrBytes[7];
sin6.sin6_addr8 = addrBytes[8];
sin6.sin6_addr9 = addrBytes[9];
sin6.sin6_addr10 = addrBytes[10];
sin6.sin6_addr11 = addrBytes[11];
sin6.sin6_addr12 = addrBytes[12];
sin6.sin6_addr13 = addrBytes[13];
sin6.sin6_addr14 = addrBytes[14];
sin6.sin6_addr15 = addrBytes[15];
}
//
// Converts native structure PEER_PEOPLE_NEAR_ME to managed PeerNearMe class
//
// <SecurityKernel Critical="True" Ring="0">
// <SatisfiesLinkDemand Name="Marshal.PtrToStringUni(System.IntPtr):System.String" />
// <ReferencesCritical Name="Method: ConvertPEER_ENDPOINTToPeerEndPoint(PEER_ENDPOINT):PeerEndPoint" Ring="1" />
// </SecurityKernel>
[System.Security.SecurityCritical]
internal static PeerNearMe PEER_PEOPLE_NEAR_METoPeerNearMe(PEER_PEOPLE_NEAR_ME ppnm)
{
PeerNearMe peerNearMe = new PeerNearMe();
peerNearMe.Id = CollaborationHelperFunctions.ConvertGUIDToGuid(ppnm.id);
peerNearMe.Nickname = Marshal.PtrToStringUni(ppnm.pwzNickname); ;
PEER_ENDPOINT pe = ppnm.endpoint;
PeerEndPoint peerEP = ConvertPEER_ENDPOINTToPeerEndPoint(pe);
peerNearMe.PeerEndPoints.Add(peerEP);
return peerNearMe;
}
//
// Converts native PEER_OBJECT structure into PeerObject class
//
// <SecurityKernel Critical="True" Ring="0">
// <SatisfiesLinkDemand Name="Marshal.Copy(System.IntPtr,System.Byte[],System.Int32,System.Int32):System.Void" />
// </SecurityKernel>
[System.Security.SecurityCritical]
internal static PeerObject ConvertPEER_OBJECTToPeerObject(PEER_OBJECT po)
{
byte[] data = null;
if (po.data.cbData != 0){
data = new byte[po.data.cbData];
Marshal.Copy(po.data.pbData, data, 0, (int)po.data.cbData);
}
return new PeerObject(ConvertGUIDToGuid(po.guid), data, (PeerScope)po.dwPublicationScope);
}
//
// Converts native PEER_APPLICATION structure into PeerApplication class
//
// <SecurityKernel Critical="True" Ring="0">
// <SatisfiesLinkDemand Name="Marshal.Copy(System.IntPtr,System.Byte[],System.Int32,System.Int32):System.Void" />
// <SatisfiesLinkDemand Name="Marshal.PtrToStringUni(System.IntPtr):System.String" />
// </SecurityKernel>
[System.Security.SecurityCritical]
internal static PeerApplication ConvertPEER_APPLICATIONToPeerApplication(PEER_APPLICATION pa)
{
byte[] data = null;
if (pa.data.cbData != 0){
data = new byte[pa.data.cbData];
Marshal.Copy(pa.data.pbData, data, 0, (int)pa.data.cbData);
}
return new PeerApplication( ConvertGUIDToGuid(pa.guid),
Marshal.PtrToStringUni(pa.pwzDescription),
data,
null, null, PeerScope.None);
}
//
// Converts native PEER_ENDPOINT structure into PeerEndPoint class
//
// <SecurityKernel Critical="True" Ring="0">
// <SatisfiesLinkDemand Name="Marshal.PtrToStringUni(System.IntPtr):System.String" />
// </SecurityKernel>
[System.Security.SecurityCritical]
internal static PeerEndPoint ConvertPEER_ENDPOINTToPeerEndPoint(PEER_ENDPOINT pe)
{
byte[] addrBytes = new byte[]{ pe.peerAddress.sin6.sin6_addr0, pe.peerAddress.sin6.sin6_addr1,
pe.peerAddress.sin6.sin6_addr2, pe.peerAddress.sin6.sin6_addr3,
pe.peerAddress.sin6.sin6_addr4, pe.peerAddress.sin6.sin6_addr5,
pe.peerAddress.sin6.sin6_addr6, pe.peerAddress.sin6.sin6_addr7,
pe.peerAddress.sin6.sin6_addr8, pe.peerAddress.sin6.sin6_addr9,
pe.peerAddress.sin6.sin6_addr10, pe.peerAddress.sin6.sin6_addr11,
pe.peerAddress.sin6.sin6_addr12, pe.peerAddress.sin6.sin6_addr13,
pe.peerAddress.sin6.sin6_addr14, pe.peerAddress.sin6.sin6_addr15};
IPAddress IPAddr = new IPAddress(addrBytes, (long)pe.peerAddress.sin6.sin6_scope_id);
ushort port;
unchecked{
port = (ushort)IPAddress.NetworkToHostOrder((short)pe.peerAddress.sin6.sin6_port);
}
IPEndPoint IPEndPt = new IPEndPoint(IPAddr, port);
return new PeerEndPoint(IPEndPt, Marshal.PtrToStringUni(pe.pwzEndpointName));
}
//
// Converts IPEndpoint class into native PEER_ADDRESS structure
//
internal static PEER_ADDRESS ConvertIPEndpointToPEER_ADDRESS(IPEndPoint endPoint)
{
PEER_ADDRESS pa = new PEER_ADDRESS();
SOCKADDR_IN6 sin = new SOCKADDR_IN6();
sin.sin6_family = (ushort)endPoint.AddressFamily;
sin.sin6_flowinfo = 0; //
unchecked{
sin.sin6_port = (ushort)IPAddress.HostToNetworkOrder((short)endPoint.Port);
}
sin.sin6_scope_id = (uint)endPoint.Address.ScopeId;
CollaborationHelperFunctions.ByteArrayToSin6Addr(endPoint.Address.GetAddressBytes(), ref sin);
pa.dwSize = 32;
pa.sin6 = sin;
return pa;
}
//
// Cleans up the registered handle and the wait event. Called under lock from events.
//
// <SecurityKernel Critical="True" Ring="0">
// <SatisfiesLinkDemand Name="SafeHandle.get_IsInvalid():System.Boolean" />
// <SatisfiesLinkDemand Name="SafeHandle.Dispose():System.Void" />
// <ReferencesCritical Name="Parameter safeEvent of type: SafeCollabEvent" Ring="1" />
// </SecurityKernel>
[System.Security.SecurityCritical]
[SecurityPermissionAttribute(SecurityAction.LinkDemand, UnmanagedCode = true)]
internal static void CleanEventVars(ref RegisteredWaitHandle waitHandle,
ref SafeCollabEvent safeEvent,
ref AutoResetEvent firedEvent)
{
if (waitHandle != null){
waitHandle.Unregister(null);
waitHandle = null;
}
if ((safeEvent != null) && (!safeEvent.IsInvalid)){
safeEvent.Dispose();
}
if (firedEvent != null){
firedEvent.Close();
firedEvent = null;
}
}
// <SecurityKernel Critical="True" Ring="0">
// <SatisfiesLinkDemand Name="WaitHandle.get_SafeWaitHandle():Microsoft.Win32.SafeHandles.SafeWaitHandle" />
// <CallsSuppressUnmanagedCode Name="UnsafeCollabNativeMethods.PeerCollabRegisterEvent(Microsoft.Win32.SafeHandles.SafeWaitHandle,System.UInt32,System.Net.PeerToPeer.Collaboration.PEER_COLLAB_EVENT_REGISTRATION&,System.Net.PeerToPeer.Collaboration.SafeCollabEvent&):System.Int32" />
// <ReferencesCritical Name="Parameter safePresenceChangedEvent of type: SafeCollabEvent" Ring="1" />
// <ReferencesCritical Name="Method: PeerToPeerException.CreateFromHr(System.String,System.Int32):System.Net.PeerToPeer.PeerToPeerException" Ring="1" />
// </SecurityKernel>
[System.Security.SecurityCritical]
internal static void AddMyPresenceChanged(EventHandler<PresenceChangedEventArgs> callback,
ref EventHandler<PresenceChangedEventArgs> presenceChanged,
object lockPresenceChangedEvent,
ref RegisteredWaitHandle regPresenceChangedWaitHandle,
ref AutoResetEvent presenceChangedEvent,
ref SafeCollabEvent safePresenceChangedEvent,
WaitOrTimerCallback PresenceChangedCallback)
{
//
// Register a wait handle if one has not been registered already
//
lock (lockPresenceChangedEvent){
if (presenceChanged == null){
presenceChangedEvent = new AutoResetEvent(false);
//
// Register callback with a wait handle
//
regPresenceChangedWaitHandle = ThreadPool.RegisterWaitForSingleObject(presenceChangedEvent, //Event that triggers the callback
PresenceChangedCallback, //callback to be called
null, //state to be passed
-1, //Timeout - aplicable only for timers
false //call us everytime the event is set
);
PEER_COLLAB_EVENT_REGISTRATION pcer = new PEER_COLLAB_EVENT_REGISTRATION();
pcer.eventType = PeerCollabEventType.MyPresenceChanged;
pcer.pInstance = IntPtr.Zero;
//
// Register event with collab
//
int errorCode = UnsafeCollabNativeMethods.PeerCollabRegisterEvent(
presenceChangedEvent.SafeWaitHandle,
1,
ref pcer,
out safePresenceChangedEvent);
if (errorCode != 0){
Logging.P2PTraceSource.TraceEvent(TraceEventType.Error, 0, "PeerCollabRegisterEvent returned with errorcode {0}", errorCode);
throw PeerToPeerException.CreateFromHr(SR.GetString(SR.Collab_PresenceChangedRegFailed), errorCode);
}
}
presenceChanged += callback;
}
Logging.P2PTraceSource.TraceEvent(TraceEventType.Information, 0, "AddMyPresenceChanged() successful.");
}
// <SecurityKernel Critical="True" Ring="0">
// <SatisfiesLinkDemand Name="WaitHandle.get_SafeWaitHandle():Microsoft.Win32.SafeHandles.SafeWaitHandle" />
// <CallsSuppressUnmanagedCode Name="UnsafeCollabNativeMethods.PeerCollabRegisterEvent(Microsoft.Win32.SafeHandles.SafeWaitHandle,System.UInt32,System.Net.PeerToPeer.Collaboration.PEER_COLLAB_EVENT_REGISTRATION&,System.Net.PeerToPeer.Collaboration.SafeCollabEvent&):System.Int32" />
// <ReferencesCritical Name="Parameter safeAppChangedEvent of type: SafeCollabEvent" Ring="1" />
// <ReferencesCritical Name="Method: PeerToPeerException.CreateFromHr(System.String,System.Int32):System.Net.PeerToPeer.PeerToPeerException" Ring="1" />
// </SecurityKernel>
[System.Security.SecurityCritical]
internal static void AddMyApplicationChanged(EventHandler<ApplicationChangedEventArgs> callback,
ref EventHandler<ApplicationChangedEventArgs> applicationChanged,
object lockAppChangedEvent,
ref RegisteredWaitHandle regAppChangedWaitHandle,
ref AutoResetEvent appChangedEvent,
ref SafeCollabEvent safeAppChangedEvent,
WaitOrTimerCallback ApplicationChangedCallback)
{
//
// Register a wait handle if one has not been registered already
//
lock (lockAppChangedEvent){
if (applicationChanged == null){
appChangedEvent = new AutoResetEvent(false);
//
// Register callback with a wait handle
//
regAppChangedWaitHandle = ThreadPool.RegisterWaitForSingleObject(appChangedEvent, //Event that triggers the callback
ApplicationChangedCallback, //callback to be called
null, //state to be passed
-1, //Timeout - aplicable only for timers
false //call us everytime the event is set
);
PEER_COLLAB_EVENT_REGISTRATION pcer = new PEER_COLLAB_EVENT_REGISTRATION();
pcer.eventType = PeerCollabEventType.MyApplicationChanged;
pcer.pInstance = IntPtr.Zero;
//
// Register event with collab
//
int errorCode = UnsafeCollabNativeMethods.PeerCollabRegisterEvent(
appChangedEvent.SafeWaitHandle,
1,
ref pcer,
out safeAppChangedEvent);
if (errorCode != 0){
Logging.P2PTraceSource.TraceEvent(TraceEventType.Error, 0, "PeerCollabRegisterEvent returned with errorcode {0}", errorCode);
throw PeerToPeerException.CreateFromHr(SR.GetString(SR.Collab_ApplicationChangedRegFailed), errorCode);
}
}
applicationChanged += callback;
}
Logging.P2PTraceSource.TraceEvent(TraceEventType.Information, 0, "AddApplicationChanged() successful.");
}
// <SecurityKernel Critical="True" Ring="0">
// <SatisfiesLinkDemand Name="WaitHandle.get_SafeWaitHandle():Microsoft.Win32.SafeHandles.SafeWaitHandle" />
// <CallsSuppressUnmanagedCode Name="UnsafeCollabNativeMethods.PeerCollabRegisterEvent(Microsoft.Win32.SafeHandles.SafeWaitHandle,System.UInt32,System.Net.PeerToPeer.Collaboration.PEER_COLLAB_EVENT_REGISTRATION&,System.Net.PeerToPeer.Collaboration.SafeCollabEvent&):System.Int32" />
// <ReferencesCritical Name="Parameter safeObjChangedEvent of type: SafeCollabEvent" Ring="1" />
// <ReferencesCritical Name="Method: PeerToPeerException.CreateFromHr(System.String,System.Int32):System.Net.PeerToPeer.PeerToPeerException" Ring="1" />
// </SecurityKernel>
[System.Security.SecurityCritical]
internal static void AddMyObjectChanged(EventHandler<ObjectChangedEventArgs> callback,
ref EventHandler<ObjectChangedEventArgs> objectChanged,
object lockObjChangedEvent,
ref RegisteredWaitHandle regObjChangedWaitHandle,
ref AutoResetEvent objChangedEvent,
ref SafeCollabEvent safeObjChangedEvent,
WaitOrTimerCallback ObjectChangedCallback)
{
//
// Register a wait handle if one has not been registered already
//
lock (lockObjChangedEvent){
if (objectChanged == null){
objChangedEvent = new AutoResetEvent(false);
//
// Register callback with a wait handle
//
regObjChangedWaitHandle = ThreadPool.RegisterWaitForSingleObject(objChangedEvent, //Event that triggers the callback
ObjectChangedCallback, //callback to be called
null, //state to be passed
-1, //Timeout - aplicable only for timers
false //call us everytime the event is set
);
PEER_COLLAB_EVENT_REGISTRATION pcer = new PEER_COLLAB_EVENT_REGISTRATION();
pcer.eventType = PeerCollabEventType.MyObjectChanged;
pcer.pInstance = IntPtr.Zero;
//
// Register event with collab
//
int errorCode = UnsafeCollabNativeMethods.PeerCollabRegisterEvent(
objChangedEvent.SafeWaitHandle,
1,
ref pcer,
out safeObjChangedEvent);
if (errorCode != 0){
Logging.P2PTraceSource.TraceEvent(TraceEventType.Error, 0, "PeerCollabRegisterEvent returned with errorcode {0}", errorCode);
throw PeerToPeerException.CreateFromHr(SR.GetString(SR.Collab_ObjectChangedRegFailed), errorCode);
}
}
objectChanged += callback;
}
Logging.P2PTraceSource.TraceEvent(TraceEventType.Information, 0, "AddObjectChanged() successful.");
}
internal static void ThrowIfInvitationResponseInvalid(PeerInvitationResponse response)
{
// throw an exception if the response from the native API was PEER_INVITATION_RESPONSE_ERROR
if (response.PeerInvitationResponseType < PeerInvitationResponseType.Declined ||
response.PeerInvitationResponseType > PeerInvitationResponseType.Expired)
{
throw new PeerToPeerException(SR.GetString(SR.Collab_InviteFailed));
}
}
}
}
|
