dcerpc/tcp: fix fragmentation handling

Really count the fragments, and set it done when last was received

rust/src/dcerpc/dcerpc.rs

@@ -645,8 +645,8 @@ impl DCERPCState {
                         &mut tx.stub_data_buffer_ts,
                         &mut tx.stub_data_buffer_reset_ts,
                     );
-                    tx.req_done = true;
-                    tx.frag_cnt_ts = 1;
+                    tx.req_done = tx.stub_data_buffer_reset_ts;
+                    tx.frag_cnt_ts += 1;
                     if let Some(flow) = self.flow {
                         sc_app_layer_parser_trigger_raw_stream_inspection(flow, Direction::ToServer as i32);
                     }
@@ -660,8 +660,8 @@ impl DCERPCState {
                         &mut tx.stub_data_buffer_tc,
                         &mut tx.stub_data_buffer_reset_tc,
                     );
-                    tx.resp_done = true;
-                    tx.frag_cnt_tc = 1;
+                    tx.resp_done = tx.stub_data_buffer_reset_tc;
+                    tx.frag_cnt_tc += 1;
                     if let Some(flow) = self.flow {
                         sc_app_layer_parser_trigger_raw_stream_inspection(flow, Direction::ToClient as i32);
                     }