SeQuerySessionIdTokenEx

NTSTATUS __stdcall SeQuerySessionIdTokenEx(PVOID Token, UINT64 *SessionId, UINT8 *IsServiceSession){
  _ETHREAD *CurrentThread; 
  UINT64 *v5; 
  bool v7; 
  unsigned int v8; 
  _EJOB *ServerSilo; 
  CurrentThread = (_ETHREAD *)KeGetCurrentThread();
  ServerSilo = 0i64;
  v5 = SessionId;
  --*((_WORD *)CurrentThread + 242);
  v7 = 1;
  LOBYTE(SessionId) = 1;
  ExAcquireResourceSharedLite(*((PERESOURCE *)Token + 6), (BOOL)SessionId);
  v8 = *((_DWORD *)Token + 30);
  *(_DWORD *)v5 = v8;
  ExReleaseResourceLite(*((PERESOURCE *)Token + 6));
  KeLeaveCriticalRegionThread((__int64)KeGetCurrentThread());
  if( v8 )
    v7 = (int)PsGetSiloBySessionId(v8, &ServerSilo) >= 0
      && v8 == (unsigned int)PsGetServerSiloServiceSessionId(ServerSilo);
  *IsServiceSession = v7;
  return 0;
}

Referenced by:

PiPnpRtlApplyMandatoryFilters
PiPnpRtlIsDeviceValidForSession
PiUEventApplyAdditionalFilters