2 * COPYRIGHT: See COPYING in the top level directory
3 * PROJECT: ReactOS kernel
4 * FILE: lib/ntdll/csr/connect.c
5 * PURPOSE: Routines for connecting and calling CSR
6 * PROGRAMMER: Alex Ionescu (alex@relsoft.net)
9 /* INCLUDES *******************************************************************/
15 /* GLOBALS ********************************************************************/
20 ULONG_PTR CsrPortMemoryDelta
;
21 BOOLEAN InsideCsrProcess
= FALSE
;
24 (NTAPI
*PCSR_SERVER_API_ROUTINE
)(IN PPORT_MESSAGE Request
,
25 IN PPORT_MESSAGE Reply
);
27 PCSR_SERVER_API_ROUTINE CsrServerApiRoutine
;
29 #define UNICODE_PATH_SEP L"\\"
31 /* FUNCTIONS ******************************************************************/
48 CsrClientCallServer(IN OUT PCSR_API_MESSAGE ApiMessage
,
49 IN OUT PCSR_CAPTURE_BUFFER CaptureBuffer OPTIONAL
,
50 IN CSR_API_NUMBER ApiNumber
,
55 PULONG_PTR OffsetPointer
;
57 /* Fill out the Port Message Header. */
58 ApiMessage
->Header
.u2
.ZeroInit
= 0;
59 ApiMessage
->Header
.u1
.s1
.TotalLength
=
60 FIELD_OFFSET(CSR_API_MESSAGE
, Data
) + DataLength
;
61 ApiMessage
->Header
.u1
.s1
.DataLength
=
62 ApiMessage
->Header
.u1
.s1
.TotalLength
- sizeof(PORT_MESSAGE
);
64 /* Fill out the CSR Header. */
65 ApiMessage
->ApiNumber
= ApiNumber
;
66 ApiMessage
->CsrCaptureData
= NULL
;
68 DPRINT("API: %lx, u1.s1.DataLength: %x, u1.s1.TotalLength: %x\n",
70 ApiMessage
->Header
.u1
.s1
.DataLength
,
71 ApiMessage
->Header
.u1
.s1
.TotalLength
);
73 /* Check if we are already inside a CSR Server. */
74 if (!InsideCsrProcess
)
76 /* Check if we got a Capture Buffer. */
80 * We have to convert from our local (client) view
81 * to the remote (server) view.
83 ApiMessage
->CsrCaptureData
= (PCSR_CAPTURE_BUFFER
)
84 ((ULONG_PTR
)CaptureBuffer
+ CsrPortMemoryDelta
);
86 /* Lock the buffer. */
87 CaptureBuffer
->BufferEnd
= NULL
;
90 * Each client pointer inside the CSR message is converted into
91 * a server pointer, and each pointer to these message pointers
92 * is converted into an offset.
94 PointerCount
= CaptureBuffer
->PointerCount
;
95 OffsetPointer
= CaptureBuffer
->PointerOffsetsArray
;
96 while (PointerCount
--)
98 if (*OffsetPointer
!= 0)
100 *(PULONG_PTR
)*OffsetPointer
+= CsrPortMemoryDelta
;
101 *OffsetPointer
-= (ULONG_PTR
)ApiMessage
;
107 /* Send the LPC Message. */
108 Status
= NtRequestWaitReplyPort(CsrApiPort
,
110 &ApiMessage
->Header
);
112 /* Check if we got a Capture Buffer. */
116 * We have to convert back from the remote (server) view
117 * to our local (client) view.
119 ApiMessage
->CsrCaptureData
= (PCSR_CAPTURE_BUFFER
)
120 ((ULONG_PTR
)ApiMessage
->CsrCaptureData
- CsrPortMemoryDelta
);
123 * Convert back the offsets into pointers to CSR message
124 * pointers, and convert back these message server pointers
125 * into client pointers.
127 PointerCount
= CaptureBuffer
->PointerCount
;
128 OffsetPointer
= CaptureBuffer
->PointerOffsetsArray
;
129 while (PointerCount
--)
131 if (*OffsetPointer
!= 0)
133 *OffsetPointer
+= (ULONG_PTR
)ApiMessage
;
134 *(PULONG_PTR
)*OffsetPointer
-= CsrPortMemoryDelta
;
140 /* Check for success. */
141 if (!NT_SUCCESS(Status
))
143 /* We failed. Overwrite the return value with the failure. */
144 DPRINT1("LPC Failed: %lx\n", Status
);
145 ApiMessage
->Status
= Status
;
150 /* This is a server-to-server call. Save our CID and do a direct call. */
151 DPRINT1("Next gen server-to-server call\n");
153 /* We check this equality inside CsrValidateMessageBuffer. */
154 ApiMessage
->Header
.ClientId
= NtCurrentTeb()->ClientId
;
156 Status
= CsrServerApiRoutine(&ApiMessage
->Header
,
157 &ApiMessage
->Header
);
159 /* Check for success. */
160 if (!NT_SUCCESS(Status
))
162 /* We failed. Overwrite the return value with the failure. */
163 ApiMessage
->Status
= Status
;
167 /* Return the CSR Result. */
168 DPRINT("Got back: 0x%lx\n", ApiMessage
->Status
);
169 return ApiMessage
->Status
;
174 CsrpConnectToServer(IN PWSTR ObjectDirectory
)
176 ULONG PortNameLength
;
177 UNICODE_STRING PortName
;
178 LARGE_INTEGER CsrSectionViewSize
;
180 HANDLE CsrSectionHandle
;
182 REMOTE_PORT_VIEW LpcRead
;
183 SECURITY_QUALITY_OF_SERVICE SecurityQos
;
184 SID_IDENTIFIER_AUTHORITY NtSidAuthority
= {SECURITY_NT_AUTHORITY
};
185 PSID SystemSid
= NULL
;
186 CSR_CONNECTION_INFO ConnectionInfo
;
187 ULONG ConnectionInfoLength
= sizeof(CSR_CONNECTION_INFO
);
189 DPRINT("%s(%S)\n", __FUNCTION__
, ObjectDirectory
);
191 /* Binary compatibility with MS KERNEL32 */
192 if (NULL
== ObjectDirectory
)
194 ObjectDirectory
= L
"\\Windows";
197 /* Calculate the total port name size */
198 PortNameLength
= ((wcslen(ObjectDirectory
) + 1) * sizeof(WCHAR
)) +
199 sizeof(CSR_PORT_NAME
);
201 /* Set the port name */
203 PortName
.MaximumLength
= PortNameLength
;
205 /* Allocate a buffer for it */
206 PortName
.Buffer
= RtlAllocateHeap(RtlGetProcessHeap(), HEAP_ZERO_MEMORY
, PortNameLength
);
207 if (PortName
.Buffer
== NULL
)
209 return STATUS_INSUFFICIENT_RESOURCES
;
212 /* Create the name */
213 RtlAppendUnicodeToString(&PortName
, ObjectDirectory
);
214 RtlAppendUnicodeToString(&PortName
, UNICODE_PATH_SEP
);
215 RtlAppendUnicodeToString(&PortName
, CSR_PORT_NAME
);
217 /* Create a section for the port memory */
218 CsrSectionViewSize
.QuadPart
= CSR_CSRSS_SECTION_SIZE
;
219 Status
= NtCreateSection(&CsrSectionHandle
,
226 if (!NT_SUCCESS(Status
))
228 DPRINT1("Failure allocating CSR Section\n");
232 /* Set up the port view structures to match them with the section */
233 LpcWrite
.Length
= sizeof(PORT_VIEW
);
234 LpcWrite
.SectionHandle
= CsrSectionHandle
;
235 LpcWrite
.SectionOffset
= 0;
236 LpcWrite
.ViewSize
= CsrSectionViewSize
.u
.LowPart
;
237 LpcWrite
.ViewBase
= 0;
238 LpcWrite
.ViewRemoteBase
= 0;
239 LpcRead
.Length
= sizeof(REMOTE_PORT_VIEW
);
240 LpcRead
.ViewSize
= 0;
241 LpcRead
.ViewBase
= 0;
244 SecurityQos
.ImpersonationLevel
= SecurityImpersonation
;
245 SecurityQos
.ContextTrackingMode
= SECURITY_DYNAMIC_TRACKING
;
246 SecurityQos
.EffectiveOnly
= TRUE
;
248 /* Setup the connection info */
249 ConnectionInfo
.Version
= 0x10000;
251 /* Create a SID for us */
252 Status
= RtlAllocateAndInitializeSid(&NtSidAuthority
,
254 SECURITY_LOCAL_SYSTEM_RID
,
263 if (!NT_SUCCESS(Status
))
266 DPRINT1("Couldn't allocate SID\n");
267 NtClose(CsrSectionHandle
);
271 /* Connect to the port */
272 Status
= NtSecureConnectPort(&CsrApiPort
,
280 &ConnectionInfoLength
);
281 NtClose(CsrSectionHandle
);
282 if (!NT_SUCCESS(Status
))
285 DPRINT1("Couldn't connect to CSR port\n");
289 /* Save the delta between the sections, for capture usage later */
290 CsrPortMemoryDelta
= (ULONG_PTR
)LpcWrite
.ViewRemoteBase
-
291 (ULONG_PTR
)LpcWrite
.ViewBase
;
293 /* Save the Process */
294 CsrProcessId
= ConnectionInfo
.ProcessId
;
296 /* Save CSR Section data */
297 NtCurrentPeb()->ReadOnlySharedMemoryBase
= ConnectionInfo
.SharedSectionBase
;
298 NtCurrentPeb()->ReadOnlySharedMemoryHeap
= ConnectionInfo
.SharedSectionHeap
;
299 NtCurrentPeb()->ReadOnlyStaticServerData
= ConnectionInfo
.SharedSectionData
;
301 /* Create the port heap */
302 CsrPortHeap
= RtlCreateHeap(0,
308 if (CsrPortHeap
== NULL
)
311 DPRINT1("Couldn't create heap for CSR port\n");
314 return STATUS_INSUFFICIENT_RESOURCES
;
318 return STATUS_SUCCESS
;
326 CsrClientConnectToServer(IN PWSTR ObjectDirectory
,
328 IN PVOID ConnectionInfo
,
329 IN OUT PULONG ConnectionInfoSize
,
330 OUT PBOOLEAN ServerToServerCall
)
333 PIMAGE_NT_HEADERS NtHeader
;
334 UNICODE_STRING CsrSrvName
;
336 ANSI_STRING CsrServerRoutineName
;
337 CSR_API_MESSAGE ApiMessage
;
338 PCSR_CLIENT_CONNECT ClientConnect
= &ApiMessage
.Data
.CsrClientConnect
;
339 PCSR_CAPTURE_BUFFER CaptureBuffer
;
341 DPRINT("CsrClientConnectToServer: %lx %p\n", ServerId
, ConnectionInfo
);
343 /* Validate the Connection Info */
344 if (ConnectionInfo
&& (!ConnectionInfoSize
|| !*ConnectionInfoSize
))
346 DPRINT1("Connection info given, but no length\n");
347 return STATUS_INVALID_PARAMETER
;
350 /* Check if we're inside a CSR Process */
351 if (InsideCsrProcess
)
353 /* Tell the client that we're already inside CSR */
354 if (ServerToServerCall
) *ServerToServerCall
= TRUE
;
355 return STATUS_SUCCESS
;
359 * We might be in a CSR Process but not know it, if this is the first call.
362 if (!(NtHeader
= RtlImageNtHeader(NtCurrentPeb()->ImageBaseAddress
)))
364 /* The image isn't valid */
365 DPRINT1("Invalid image\n");
366 return STATUS_INVALID_IMAGE_FORMAT
;
368 InsideCsrProcess
= (NtHeader
->OptionalHeader
.Subsystem
== IMAGE_SUBSYSTEM_NATIVE
);
370 /* Now we can check if we are inside or not */
371 if (InsideCsrProcess
)
373 /* We're inside, so let's find csrsrv */
374 DPRINT1("Next-GEN CSRSS support\n");
375 RtlInitUnicodeString(&CsrSrvName
, L
"csrsrv");
376 Status
= LdrGetDllHandle(NULL
,
381 /* Now get the Server to Server routine */
382 RtlInitAnsiString(&CsrServerRoutineName
, "CsrCallServerFromServer");
383 Status
= LdrGetProcedureAddress(hCsrSrv
,
384 &CsrServerRoutineName
,
386 (PVOID
*)&CsrServerApiRoutine
);
388 /* Use the local heap as port heap */
389 CsrPortHeap
= RtlGetProcessHeap();
391 /* Tell the caller we're inside the server */
392 *ServerToServerCall
= InsideCsrProcess
;
393 return STATUS_SUCCESS
;
396 /* Now check if connection info is given */
399 /* Well, we're defintely in a client now */
400 InsideCsrProcess
= FALSE
;
402 /* Do we have a connection to CSR yet? */
405 /* No, set it up now */
406 if (!NT_SUCCESS(Status
= CsrpConnectToServer(ObjectDirectory
)))
409 DPRINT1("Failure to connect to CSR\n");
414 /* Setup the connect message header */
415 ClientConnect
->ServerId
= ServerId
;
416 ClientConnect
->ConnectionInfoSize
= *ConnectionInfoSize
;
418 /* Setup a buffer for the connection info */
419 CaptureBuffer
= CsrAllocateCaptureBuffer(1, ClientConnect
->ConnectionInfoSize
);
420 if (CaptureBuffer
== NULL
)
422 return STATUS_INSUFFICIENT_RESOURCES
;
425 /* Capture the connection info data */
426 CsrCaptureMessageBuffer(CaptureBuffer
,
428 ClientConnect
->ConnectionInfoSize
,
429 &ClientConnect
->ConnectionInfo
);
431 /* Return the allocated length */
432 *ConnectionInfoSize
= ClientConnect
->ConnectionInfoSize
;
435 Status
= CsrClientCallServer(&ApiMessage
,
437 CSR_CREATE_API_NUMBER(CSRSRV_SERVERDLL_INDEX
, CsrpClientConnect
),
438 sizeof(CSR_CLIENT_CONNECT
));
440 /* Copy the updated connection info data back into the user buffer */
441 RtlMoveMemory(ConnectionInfo
,
442 ClientConnect
->ConnectionInfo
,
443 *ConnectionInfoSize
);
445 /* Free the capture buffer */
446 CsrFreeCaptureBuffer(CaptureBuffer
);
450 /* No connection info, just return */
451 Status
= STATUS_SUCCESS
;
454 /* Let the caller know if this was server to server */
455 DPRINT("Status was: 0x%lx. Are we in server: 0x%x\n", Status
, InsideCsrProcess
);
456 if (ServerToServerCall
) *ServerToServerCall
= InsideCsrProcess
;