ReactOS 0.4.16-dev-197-g92996da
connect.c
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1/*
2 * PROJECT: ReactOS Client/Server Runtime SubSystem
3 * LICENSE: GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
4 * PURPOSE: CSR Client Library - CSR connection and calling
5 * COPYRIGHT: Copyright 2005-2013 Alex Ionescu <alex@relsoft.net>
6 * Copyright 2012-2022 Hermès Bélusca-Maïto <hermes.belusca-maito@reactos.org>
7 */
8
9/* INCLUDES *******************************************************************/
10
11#include "csrlib.h"
12
13#define NTOS_MODE_USER
14#include <ndk/ldrfuncs.h>
15#include <ndk/lpcfuncs.h>
16#include <ndk/mmfuncs.h>
17#include <ndk/obfuncs.h>
18#include <ndk/umfuncs.h>
19
20#include <csrsrv.h> // For CSR_CSRSS_SECTION_SIZE
21
22#define NDEBUG
23#include <debug.h>
24
25/* GLOBALS ********************************************************************/
26
32
33typedef NTSTATUS
37
39
40/* FUNCTIONS ******************************************************************/
41
42static NTSTATUS
44 _In_ PCWSTR ObjectDirectory)
45{
47 SIZE_T PortNameLength;
49 LARGE_INTEGER CsrSectionViewSize;
50 HANDLE CsrSectionHandle;
51 PORT_VIEW LpcWrite;
52 REMOTE_PORT_VIEW LpcRead;
55 PSID SystemSid = NULL;
56 CSR_API_CONNECTINFO ConnectionInfo;
57 ULONG ConnectionInfoLength = sizeof(ConnectionInfo);
58
59 DPRINT("%s(%S)\n", __FUNCTION__, ObjectDirectory);
60
61 /* Calculate the total port name size */
62 PortNameLength = ((wcslen(ObjectDirectory) + 1) * sizeof(WCHAR)) +
63 sizeof(CSR_PORT_NAME);
64 if (PortNameLength > UNICODE_STRING_MAX_BYTES)
65 {
66 DPRINT1("PortNameLength too big: %Iu\n", PortNameLength);
68 }
69
70 /* Set the port name */
71 PortName.Length = 0;
72 PortName.MaximumLength = (USHORT)PortNameLength;
73
74 /* Allocate a buffer for it */
75 PortName.Buffer = RtlAllocateHeap(RtlGetProcessHeap(), HEAP_ZERO_MEMORY, PortNameLength);
76 if (PortName.Buffer == NULL)
77 {
79 }
80
81 /* Create the name */
82 RtlAppendUnicodeToString(&PortName, ObjectDirectory);
85
86 /* Create a section for the port memory */
87 CsrSectionViewSize.QuadPart = CSR_CSRSS_SECTION_SIZE;
88 Status = NtCreateSection(&CsrSectionHandle,
90 NULL,
91 &CsrSectionViewSize,
94 NULL);
95 if (!NT_SUCCESS(Status))
96 {
97 DPRINT1("Failure allocating CSR Section\n");
98 return Status;
99 }
100
101 /* Set up the port view structures to match them with the section */
102 LpcWrite.Length = sizeof(LpcWrite);
103 LpcWrite.SectionHandle = CsrSectionHandle;
104 LpcWrite.SectionOffset = 0;
105 LpcWrite.ViewSize = CsrSectionViewSize.u.LowPart;
106 LpcWrite.ViewBase = 0;
107 LpcWrite.ViewRemoteBase = 0;
108 LpcRead.Length = sizeof(LpcRead);
109 LpcRead.ViewSize = 0;
110 LpcRead.ViewBase = 0;
111
112 /* Setup the QoS */
115 SecurityQos.EffectiveOnly = TRUE;
116
117 /* Setup the connection info */
118 ConnectionInfo.DebugFlags = 0;
119
120 /* Create a SID for us */
122 1,
124 0,
125 0,
126 0,
127 0,
128 0,
129 0,
130 0,
131 &SystemSid);
132 if (!NT_SUCCESS(Status))
133 {
134 /* Failure */
135 DPRINT1("Couldn't allocate SID\n");
136 NtClose(CsrSectionHandle);
137 return Status;
138 }
139
140 /* Connect to the port */
142 &PortName,
143 &SecurityQos,
144 &LpcWrite,
145 SystemSid,
146 &LpcRead,
147 NULL,
148 &ConnectionInfo,
149 &ConnectionInfoLength);
150 RtlFreeSid(SystemSid);
151 NtClose(CsrSectionHandle);
152 if (!NT_SUCCESS(Status))
153 {
154 /* Failure */
155 DPRINT1("Couldn't connect to CSR port\n");
156 return Status;
157 }
158
159 /* Save the delta between the sections, for capture usage later */
161 (ULONG_PTR)LpcWrite.ViewBase;
162
163 /* Save the Process */
164 CsrProcessId = ConnectionInfo.ServerProcessId;
165
166 /* Save CSR Section data */
167 NtCurrentPeb()->ReadOnlySharedMemoryBase = ConnectionInfo.SharedSectionBase;
168 NtCurrentPeb()->ReadOnlySharedMemoryHeap = ConnectionInfo.SharedSectionHeap;
169 NtCurrentPeb()->ReadOnlyStaticServerData = ConnectionInfo.SharedStaticServerData;
170
171 /* Create the port heap */
173 LpcWrite.ViewBase,
174 LpcWrite.ViewSize,
175 PAGE_SIZE,
176 0,
177 0);
178 if (CsrPortHeap == NULL)
179 {
180 /* Failure */
181 DPRINT1("Couldn't create heap for CSR port\n");
185 }
186
187 /* Return success */
188 return STATUS_SUCCESS;
189}
190
191/*
192 * @implemented
193 */
195NTAPI
197 _In_ PCWSTR ObjectDirectory,
198 _In_ ULONG ServerId,
199 _In_ PVOID ConnectionInfo,
200 _Inout_ PULONG ConnectionInfoSize,
201 _Out_ PBOOLEAN ServerToServerCall)
202{
204 PIMAGE_NT_HEADERS NtHeader;
205
206 DPRINT("CsrClientConnectToServer: %lx %p\n", ServerId, ConnectionInfo);
207
208 /* Validate the Connection Info */
209 if (ConnectionInfo && (!ConnectionInfoSize || !*ConnectionInfoSize))
210 {
211 DPRINT1("Connection info given, but no length\n");
213 }
214
215 /* Check if we're inside a CSR Process */
217 {
218 /* Tell the client that we're already inside CSR */
219 if (ServerToServerCall) *ServerToServerCall = TRUE;
220 return STATUS_SUCCESS;
221 }
222
223 /*
224 * We might be in a CSR Process but not know it, if this is the first call.
225 * So let's find out.
226 */
227 if (!(NtHeader = RtlImageNtHeader(NtCurrentPeb()->ImageBaseAddress)))
228 {
229 /* The image isn't valid */
230 DPRINT1("Invalid image\n");
232 }
234
235 /* Now we can check if we are inside or not */
237 {
238 UNICODE_STRING CsrSrvName;
239 HANDLE hCsrSrv;
240 ANSI_STRING CsrServerRoutineName;
241
242 /* We're inside, so let's find csrsrv */
243 RtlInitUnicodeString(&CsrSrvName, L"csrsrv");
245 NULL,
246 &CsrSrvName,
247 &hCsrSrv);
248
249 /* Now get the Server to Server routine */
250 RtlInitAnsiString(&CsrServerRoutineName, "CsrCallServerFromServer");
252 &CsrServerRoutineName,
253 0L,
255
256 /* Use the local heap as port heap */
257 CsrPortHeap = RtlGetProcessHeap();
258
259 /* Tell the caller we're inside the server */
260 if (ServerToServerCall) *ServerToServerCall = InsideCsrProcess;
261 return STATUS_SUCCESS;
262 }
263
264 /* Now check if connection info is given */
265 if (ConnectionInfo)
266 {
267 CSR_API_MESSAGE ApiMessage;
268 PCSR_CLIENT_CONNECT ClientConnect = &ApiMessage.Data.CsrClientConnect;
269 PCSR_CAPTURE_BUFFER CaptureBuffer;
270
271 /* Well, we're definitely in a client now */
273
274 /* Do we have a connection to CSR yet? */
275 if (!CsrApiPort)
276 {
277 /* No, set it up now */
278 Status = CsrpConnectToServer(ObjectDirectory);
279 if (!NT_SUCCESS(Status))
280 {
281 /* Failed */
282 DPRINT1("Failure to connect to CSR\n");
283 return Status;
284 }
285 }
286
287 /* Setup the connect message header */
288 ClientConnect->ServerId = ServerId;
289 ClientConnect->ConnectionInfoSize = *ConnectionInfoSize;
290
291 /* Setup a buffer for the connection info */
292 CaptureBuffer = CsrAllocateCaptureBuffer(1, ClientConnect->ConnectionInfoSize);
293 if (CaptureBuffer == NULL)
294 {
296 }
297
298 /* Capture the connection info data */
299 CsrCaptureMessageBuffer(CaptureBuffer,
300 ConnectionInfo,
301 ClientConnect->ConnectionInfoSize,
302 &ClientConnect->ConnectionInfo);
303
304 /* Return the allocated length */
305 *ConnectionInfoSize = ClientConnect->ConnectionInfoSize;
306
307 /* Call CSR */
308 Status = CsrClientCallServer(&ApiMessage,
309 CaptureBuffer,
311 sizeof(*ClientConnect));
312
313 /* Copy the updated connection info data back into the user buffer */
314 RtlMoveMemory(ConnectionInfo,
315 ClientConnect->ConnectionInfo,
316 *ConnectionInfoSize);
317
318 /* Free the capture buffer */
319 CsrFreeCaptureBuffer(CaptureBuffer);
320 }
321 else
322 {
323 /* No connection info, just return */
325 }
326
327 /* Let the caller know if this was server to server */
328 DPRINT("Status was: 0x%lx. Are we in server: 0x%x\n", Status, InsideCsrProcess);
329 if (ServerToServerCall) *ServerToServerCall = InsideCsrProcess;
330
331 return Status;
332}
333
334#if 0
335//
336// Structures can be padded at the end, causing the size of the entire structure
337// minus the size of the last field, not to be equal to the offset of the last
338// field.
339//
340typedef struct _TEST_EMBEDDED
341{
342 ULONG One;
343 ULONG Two;
344 ULONG Three;
345} TEST_EMBEDDED;
346
347typedef struct _TEST
348{
350 TEST_EMBEDDED Three;
351} TEST;
352
353C_ASSERT(sizeof(PORT_MESSAGE) == 0x18);
355C_ASSERT(sizeof(TEST_EMBEDDED) == 0xC);
356
357C_ASSERT(sizeof(TEST) != (sizeof(TEST_EMBEDDED) + sizeof(PORT_MESSAGE)));
358C_ASSERT((sizeof(TEST) - sizeof(TEST_EMBEDDED)) != FIELD_OFFSET(TEST, Three));
359#endif
360
361/*
362 * @implemented
363 */
365NTAPI
367 _Inout_ PCSR_API_MESSAGE ApiMessage,
368 _Inout_opt_ PCSR_CAPTURE_BUFFER CaptureBuffer,
369 _In_ CSR_API_NUMBER ApiNumber,
371{
373
374 /* Make sure the length is valid */
375 if (DataLength > (MAXSHORT - sizeof(CSR_API_MESSAGE)))
376 {
377 DPRINT1("DataLength too big: %lu\n", DataLength);
379 }
380
381 /* Fill out the Port Message Header */
382 ApiMessage->Header.u2.ZeroInit = 0;
383 /* DataLength = user_data_size + anything between
384 * header and data, including intermediate padding */
385 ApiMessage->Header.u1.s1.DataLength = (CSHORT)DataLength +
386 FIELD_OFFSET(CSR_API_MESSAGE, Data) - sizeof(ApiMessage->Header);
387 /* TotalLength = header_size + DataLength + any structure trailing padding */
388 ApiMessage->Header.u1.s1.TotalLength = (CSHORT)DataLength +
389 sizeof(CSR_API_MESSAGE) - sizeof(ApiMessage->Data);
390
391 /* Fill out the CSR Header */
392 ApiMessage->ApiNumber = ApiNumber;
393 ApiMessage->CsrCaptureData = NULL;
394
395 DPRINT("API: %lx, u1.s1.DataLength: %x, u1.s1.TotalLength: %x\n",
396 ApiNumber,
397 ApiMessage->Header.u1.s1.DataLength,
398 ApiMessage->Header.u1.s1.TotalLength);
399
400 /* Check if we are already inside a CSR Server */
401 if (!InsideCsrProcess)
402 {
403 ULONG PointerCount;
404 PULONG_PTR OffsetPointer;
405
406 /* Check if we got a Capture Buffer */
407 if (CaptureBuffer)
408 {
409 /*
410 * We have to convert from our local (client) view
411 * to the remote (server) view.
412 */
413 ApiMessage->CsrCaptureData = (PCSR_CAPTURE_BUFFER)
414 ((ULONG_PTR)CaptureBuffer + CsrPortMemoryDelta);
415
416 /* Lock the buffer */
417 CaptureBuffer->BufferEnd = NULL;
418
419 /*
420 * Each client pointer inside the CSR message is converted into
421 * a server pointer, and each pointer to these message pointers
422 * is converted into an offset.
423 */
424 PointerCount = CaptureBuffer->PointerCount;
425 OffsetPointer = CaptureBuffer->PointerOffsetsArray;
426 while (PointerCount--)
427 {
428 if (*OffsetPointer != 0)
429 {
430 *(PULONG_PTR)*OffsetPointer += CsrPortMemoryDelta;
431 *OffsetPointer -= (ULONG_PTR)ApiMessage;
432 }
433 ++OffsetPointer;
434 }
435 }
436
437 /* Send the LPC Message */
439 &ApiMessage->Header,
440 &ApiMessage->Header);
441
442 /* Check if we got a Capture Buffer */
443 if (CaptureBuffer)
444 {
445 /*
446 * We have to convert back from the remote (server) view
447 * to our local (client) view.
448 */
449 ApiMessage->CsrCaptureData = (PCSR_CAPTURE_BUFFER)
450 ((ULONG_PTR)ApiMessage->CsrCaptureData - CsrPortMemoryDelta);
451
452 /*
453 * Convert back the offsets into pointers to CSR message
454 * pointers, and convert back these message server pointers
455 * into client pointers.
456 */
457 PointerCount = CaptureBuffer->PointerCount;
458 OffsetPointer = CaptureBuffer->PointerOffsetsArray;
459 while (PointerCount--)
460 {
461 if (*OffsetPointer != 0)
462 {
463 *OffsetPointer += (ULONG_PTR)ApiMessage;
464 *(PULONG_PTR)*OffsetPointer -= CsrPortMemoryDelta;
465 }
466 ++OffsetPointer;
467 }
468 }
469
470 /* Check for success */
471 if (!NT_SUCCESS(Status))
472 {
473 /* We failed. Overwrite the return value with the failure. */
474 DPRINT1("LPC Failed: %lx\n", Status);
475 ApiMessage->Status = Status;
476 }
477 }
478 else
479 {
480 /* This is a server-to-server call */
481 DPRINT("Server-to-server call\n");
482
483 /* Save our CID; we check this equality inside CsrValidateMessageBuffer */
484 ApiMessage->Header.ClientId = NtCurrentTeb()->ClientId;
485
486 /* Do a direct call */
487 Status = CsrServerApiRoutine(ApiMessage, ApiMessage);
488
489 /* Check for success */
490 if (!NT_SUCCESS(Status))
491 {
492 /* We failed. Overwrite the return value with the failure. */
493 ApiMessage->Status = Status;
494 }
495 }
496
497 /* Return the CSR Result */
498 DPRINT("Got back: 0x%lx\n", ApiMessage->Status);
499 return ApiMessage->Status;
500}
501
502/*
503 * @implemented
504 */
505HANDLE
506NTAPI
508{
509 return CsrProcessId;
510}
511
512/* EOF */
NTSTATUS NTAPI NtCreateSection(OUT PHANDLE SectionHandle, IN ACCESS_MASK DesiredAccess, IN POBJECT_ATTRIBUTES ObjectAttributes OPTIONAL, IN PLARGE_INTEGER MaximumSize OPTIONAL, IN ULONG SectionPageProtection OPTIONAL, IN ULONG AllocationAttributes, IN HANDLE FileHandle OPTIONAL)
Definition: section.c:3074
#define NtCurrentPeb()
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static UNICODE_STRING PortName
unsigned char BOOLEAN
LONG NTSTATUS
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#define DPRINT1
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PVOID NTAPI RtlAllocateHeap(IN PVOID HeapHandle, IN ULONG Flags, IN SIZE_T Size)
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@ Three
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@ Two
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_In_ ULONG _In_opt_ WDFREQUEST _In_opt_ PVOID _In_ size_t _In_ PVOID _In_ size_t _Out_ size_t * DataLength
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#define CSR_CREATE_API_NUMBER(ServerId, ApiId)
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#define CSRSRV_SERVERDLL_INDEX
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#define CSR_PORT_NAME
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ULONG CSR_API_NUMBER
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struct _CSR_CAPTURE_BUFFER * PCSR_CAPTURE_BUFFER
@ CsrpClientConnect
Definition: csrmsg.h:25
#define CSR_CSRSS_SECTION_SIZE
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#define NULL
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#define TRUE
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#define FALSE
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#define NTSTATUS
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#define RtlImageNtHeader
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#define HEAP_ZERO_MEMORY
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#define __FUNCTION__
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#define ULONG_PTR
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#define PAGE_SIZE
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NTSTATUS RtlAppendUnicodeToString(IN PUNICODE_STRING Str1, IN PWSTR Str2)
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Status
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GLfloat GLfloat GLfloat GLfloat h
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_CRTIMP size_t __cdecl wcslen(_In_z_ const wchar_t *_Str)
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#define NtCurrentTeb
NTSTATUS NTAPI LdrGetDllHandle(_In_opt_ PWSTR DllPath, _In_opt_ PULONG DllCharacteristics, _In_ PUNICODE_STRING DllName, _Out_ PVOID *DllHandle)
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NTSTATUS NTAPI LdrGetProcedureAddress(_In_ PVOID BaseAddress, _In_opt_ _When_(Ordinal==0, _Notnull_) PANSI_STRING Name, _In_opt_ _When_(Name==NULL, _In_range_(>, 0)) ULONG Ordinal, _Out_ PVOID *ProcedureAddress)
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@ SecurityImpersonation
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#define _Out_
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#define _In_
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NTSYSAPI PVOID NTAPI RtlFreeSid(_In_ _Post_invalid_ PSID Sid)
#define PAGE_READWRITE
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#define SECTION_ALL_ACCESS
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#define SEC_RESERVE
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NTSYSAPI PVOID NTAPI RtlCreateHeap(IN ULONG Flags, IN PVOID HeapBase OPTIONAL, IN ULONG ReserveSize OPTIONAL, IN ULONG CommitSize OPTIONAL, IN PVOID Lock OPTIONAL, IN PRTL_HEAP_PARAMETERS Parameters OPTIONAL)
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NTSYSAPI VOID NTAPI RtlInitAnsiString(PANSI_STRING DestinationString, PCSZ SourceString)
#define UNICODE_STRING_MAX_BYTES
NTSYSAPI NTSTATUS NTAPI RtlAllocateAndInitializeSid(IN PSID_IDENTIFIER_AUTHORITY IdentifierAuthority, IN UCHAR SubAuthorityCount, IN ULONG SubAuthority0, IN ULONG SubAuthority1, IN ULONG SubAuthority2, IN ULONG SubAuthority3, IN ULONG SubAuthority4, IN ULONG SubAuthority5, IN ULONG SubAuthority6, IN ULONG SubAuthority7, OUT PSID *Sid)
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#define IMAGE_SUBSYSTEM_NATIVE
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NTSTATUS NTAPI NtSecureConnectPort(OUT PHANDLE PortHandle, IN PUNICODE_STRING PortName, IN PSECURITY_QUALITY_OF_SERVICE SecurityQos, IN OUT PPORT_VIEW ClientView OPTIONAL, IN PSID ServerSid OPTIONAL, IN OUT PREMOTE_PORT_VIEW ServerView OPTIONAL, OUT PULONG MaxMessageLength OPTIONAL, IN OUT PVOID ConnectionInformation OPTIONAL, IN OUT PULONG ConnectionInformationLength OPTIONAL)
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unsigned short USHORT
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PCSR_CAPTURE_BUFFER NTAPI CsrAllocateCaptureBuffer(_In_ ULONG ArgumentCount, _In_ ULONG BufferSize)
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VOID NTAPI CsrFreeCaptureBuffer(_In_ _Frees_ptr_ PCSR_CAPTURE_BUFFER CaptureBuffer)
Definition: capture.c:210
VOID NTAPI CsrCaptureMessageBuffer(_Inout_ PCSR_CAPTURE_BUFFER CaptureBuffer, _In_opt_ PVOID MessageBuffer, _In_ ULONG MessageLength, _Out_ PVOID *CapturedData)
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union _CSR_API_MESSAGE::@3482::@3484::@3486 Data
CSR_CLIENT_CONNECT CsrClientConnect
Definition: csrmsg.h:114
ULONG ConnectionInfoSize
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PVOID ConnectionInfo
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LPC_PVOID ViewBase
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Definition: connect.c:27
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Definition: connect.c:29
NTSTATUS NTAPI CsrClientConnectToServer(_In_ PCWSTR ObjectDirectory, _In_ ULONG ServerId, _In_ PVOID ConnectionInfo, _Inout_ PULONG ConnectionInfoSize, _Out_ PBOOLEAN ServerToServerCall)
Definition: connect.c:196
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Definition: connect.c:31
PCSR_SERVER_API_ROUTINE CsrServerApiRoutine
Definition: connect.c:38
NTSTATUS NTAPI CsrClientCallServer(_Inout_ PCSR_API_MESSAGE ApiMessage, _Inout_opt_ PCSR_CAPTURE_BUFFER CaptureBuffer, _In_ CSR_API_NUMBER ApiNumber, _In_ ULONG DataLength)
Definition: connect.c:366
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short CSHORT
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