private uint RpcEntryPoint(IntPtr clientHandle, uint szInput, IntPtr input, out uint szOutput, out IntPtr output)
{
output = IntPtr.Zero;
szOutput = 0;
try
{
byte[] bytesIn = new byte[szInput];
Marshal.Copy(input, bytesIn, 0, bytesIn.Length);
byte[] bytesOut;
using (RpcCallInfo call = new RpcCallInfo(clientHandle))
{
bytesOut = Execute(call, bytesIn);
}
if (bytesOut == null)
{
return((uint)RPC_STATUS.RPC_S_NOT_LISTENING);
}
szOutput = (uint)bytesOut.Length;
output = RpcRuntime.Alloc(szOutput);
Marshal.Copy(bytesOut, 0, output, bytesOut.Length);
return((uint)RPC_STATUS.RPC_S_OK);
}
catch (Exception ex)
{
RpcRuntime.Free(output);
output = IntPtr.Zero;
szOutput = 0;
RpcTrace.Error(ex);
return((uint)RPC_STATUS.RPC_E_FAIL);
}
}
private static byte[] InvokeRpc(RpcHandle handle, Guid iid, byte[] input)
{
RpcTrace.Verbose("InvokeRpc on {0}, sending {1} bytes", handle.Handle, input.Length);
Ptr <MIDL_STUB_DESC> pStub;
if (!handle.GetPtr(out pStub))
{
pStub =
handle.CreatePtr(new MIDL_STUB_DESC(handle, handle.Pin(ClientInterfaceFactory.CreatExplicitBytesClient(iid)),
RpcRuntime.TYPE_FORMAT,
false));
}
int szResponse = 0;
IntPtr response, result;
using (Ptr <byte[]> pInputBuffer = new Ptr <byte[]>(input))
{
if (RpcRuntime.Is64BitProcess)
{
try
{
result = NativeMethods.NdrClientCall2x64(pStub.Handle, RpcRuntime.FUNC_FORMAT_PTR.Handle, handle.Handle,
input.Length,
pInputBuffer.Handle, out szResponse, out response);
}
catch (SEHException ex)
{
RpcTrace.Error(ex);
Guard.Assert(ex.ErrorCode);
throw;
}
}
else
{
using (Ptr <Int32[]> pStack32 = new Ptr <Int32[]>(new Int32[10]))
{
pStack32.Data[0] = handle.Handle.ToInt32();
pStack32.Data[1] = input.Length;
pStack32.Data[2] = pInputBuffer.Handle.ToInt32();
pStack32.Data[3] = pStack32.Handle.ToInt32() + (sizeof(int) * 6);
pStack32.Data[4] = pStack32.Handle.ToInt32() + (sizeof(int) * 8);
pStack32.Data[5] = 0; //reserved
pStack32.Data[6] = 0; //output: int dwSizeResponse
pStack32.Data[8] = 0; //output: byte* lpResponse
try
{
result = NativeMethods.NdrClientCall2x86(pStub.Handle, RpcRuntime.FUNC_FORMAT_PTR.Handle, pStack32.Handle);
}
catch (SEHException ex)
{
RpcTrace.Error(ex);
Guard.Assert(ex.ErrorCode);
throw;
}
szResponse = pStack32.Data[6];
response = new IntPtr(pStack32.Data[8]);
}
}
GC.KeepAlive(pInputBuffer);
}
// on local machine
// if 32 bit server just throws Exception in server side handler
// then 32 bits client can see "-2147467259" debug view of pointer result
// then 64 bits client can see "2147500037" debug view of pointer result
// then 32 bits client can do ToInt32 and things work fine
// then 64 bits client can do ToInt32 and get arithmetic overflow exception
// hence using ToInt64 for 64 bits client
if (IntPtr.Size == 8)
{
Guard.Assert(result.ToInt64());
}
else
{
Guard.Assert(result.ToInt32());
}
RpcTrace.Verbose("InvokeRpc.InvokeRpc response on {0}, received {1} bytes", handle.Handle, szResponse);
byte[] output = new byte[szResponse];
if (szResponse > 0 && response != IntPtr.Zero)
{
Marshal.Copy(response, output, 0, output.Length);
}
RpcRuntime.Free(response);
return(output);
}