private RPC_CALL_ATTRIBUTES_V2 GetCallInfo()
{
if (_callAttrs.Version != 0)
{
return(_callAttrs);
}
RPC_CALL_ATTRIBUTES_V2 attrs = new RPC_CALL_ATTRIBUTES_V2();
attrs.Version = 2;
attrs.Flags = RPC_CALL_ATTRIBUTES_FLAGS.RPC_QUERY_NO_AUTH_REQUIRED;
RpcError err = RpcServerInqCallAttributes(_clientHandle, ref attrs);
if (err == RpcError.RPC_S_INVALID_ARG) //may not support v2 on early edditions of XP/SP3
{
attrs.Version = 1;
err = RpcServerInqCallAttributes(_clientHandle, ref attrs);
}
if (err == RpcError.RPC_S_OK)
{
_callAttrs = attrs;
_isAuthenticated = false;
attrs.Flags = RPC_CALL_ATTRIBUTES_FLAGS.RPC_QUERY_IS_CLIENT_LOCAL |
RPC_CALL_ATTRIBUTES_FLAGS.RPC_QUERY_NO_AUTH_REQUIRED;
if ((err = RpcServerInqCallAttributes(_clientHandle, ref attrs)) == RpcError.RPC_S_OK)
{
_callAttrs.IsClientLocal = attrs.IsClientLocal;
if (_callAttrs.ProtocolSequence == RpcProtoseqType.LRPC)
{
attrs.Flags = RPC_CALL_ATTRIBUTES_FLAGS.RPC_QUERY_CLIENT_PID;
if ((err = RpcServerInqCallAttributes(_clientHandle, ref attrs)) == RpcError.RPC_S_OK)
{
_callAttrs.ClientPID = attrs.ClientPID;
}
}
}
if (_callAttrs.ProtocolSequence != RpcProtoseqType.LRPC)
{
using (Ptr <byte[]> callerAddress = new Ptr <byte[]>(new byte[1024]))
{
RPC_CALL_LOCAL_ADDRESS_V1 localAddress = new RPC_CALL_LOCAL_ADDRESS_V1();
localAddress.Version = 1;
localAddress.Buffer = callerAddress.Handle;
localAddress.BufferSize = 1024;
localAddress.AddressFormat = RpcLocalAddressFormat.Invalid;
_callAttrs = attrs;
using (
Ptr <RPC_CALL_LOCAL_ADDRESS_V1> callerAddressv1 =
new Ptr <RPC_CALL_LOCAL_ADDRESS_V1>(localAddress))
{
attrs.CallLocalAddress = callerAddressv1.Handle;
attrs.Flags = RPC_CALL_ATTRIBUTES_FLAGS.RPC_QUERY_CALL_LOCAL_ADDRESS |
RPC_CALL_ATTRIBUTES_FLAGS.RPC_QUERY_NO_AUTH_REQUIRED;
if ((err = RpcServerInqCallAttributes(_clientHandle, ref attrs)) == RpcError.RPC_S_OK)
{
_clientAddress = new byte[callerAddressv1.Data.BufferSize];
Array.Copy(callerAddress.Data, _clientAddress, _clientAddress.Length);
}
}
}
}
using (Ptr <byte[]> clientPrincipal = new Ptr <byte[]>(new byte[1024]))
{
attrs.ClientPrincipalName = clientPrincipal.Handle;
attrs.ClientPrincipalNameBufferLength = 1024;
attrs.Flags = RPC_CALL_ATTRIBUTES_FLAGS.RPC_QUERY_CLIENT_PRINCIPAL_NAME;
if ((err = RpcServerInqCallAttributes(_clientHandle, ref attrs)) == RpcError.RPC_S_OK)
{
_clientPrincipalName = Marshal.PtrToStringUni(clientPrincipal.Handle);
if (!String.IsNullOrEmpty(_clientPrincipalName))
{
_isAuthenticated = true;
//On Windows XP this only returns a value on LRPC so we know they are local
if (attrs.Version == 1)
{
_callAttrs.IsClientLocal = RpcCallClientLocality.Local;
}
}
}
}
}
else
{
Log.Warning("RpcServerInqCallAttributes error {0} = {1}", err, new RpcException(err).Message);
}
return(_callAttrs);
}