check for overly large header field in send_headers

src/proto/streams/send.rs

@@ -85,6 +85,10 @@ impl Send {
             }
         }
 
+        if frame.has_too_big_field() {
+            return Err(UserError::HeaderTooBig);
+        }
+
         let end_stream = frame.is_end_stream();
 
         // Update the state
@@ -216,6 +220,10 @@ impl Send {
             return Err(UserError::UnexpectedFrameType);
         }
 
+        if frame.has_too_big_field() {
+            return Err(UserError::HeaderTooBig);
+        }
+
         stream.state.send_close();
 
         trace!("send_trailers -- queuing; frame={:?}", frame);