Implement NtAccessCheck.
diff --git a/server/protocol.def b/server/protocol.def
index 2dd38c6..bbf2213 100644
--- a/server/protocol.def
+++ b/server/protocol.def
@@ -2344,6 +2344,20 @@
obj_handle_t new_handle; /* duplicated handle */
@END
+@REQ(access_check)
+ obj_handle_t handle; /* handle to the token */
+ unsigned int desired_access; /* desired access to the object */
+ unsigned int mapping_read; /* mapping from generic read to specific rights */
+ unsigned int mapping_write; /* mapping from generic write to specific rights */
+ unsigned int mapping_execute; /* mapping from generic execute to specific rights */
+ unsigned int mapping_all; /* mapping from generic all to specific rights */
+ VARARG(sd,security_descriptor); /* security descriptor to check */
+@REPLY
+ unsigned int access_granted; /* access rights actually granted */
+ unsigned int access_status; /* was access granted? */
+ unsigned int privileges_len; /* length needed to store privileges */
+ VARARG(privileges,LUID_AND_ATTRIBUTES); /* privileges used during access check */
+@END
/* Create a mailslot */
@REQ(create_mailslot)
