From 3fc8163fbd7e11d5273e11c034b15e1836d9b07b Mon Sep 17 00:00:00 2001
From: Eric Anderson <ejona@google.com>
Date: Mon, 15 May 2017 09:06:11 -0700
Subject: [PATCH] okhttp: Make implicit cast explicit to declare it safe

---
 okhttp/src/main/java/io/grpc/okhttp/OkHttpClientStream.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/okhttp/src/main/java/io/grpc/okhttp/OkHttpClientStream.java b/okhttp/src/main/java/io/grpc/okhttp/OkHttpClientStream.java
index ef7cf31221..d1ff6ab5d9 100644
--- a/okhttp/src/main/java/io/grpc/okhttp/OkHttpClientStream.java
+++ b/okhttp/src/main/java/io/grpc/okhttp/OkHttpClientStream.java
@@ -282,7 +282,9 @@ class OkHttpClientStream extends AbstractClientStream2 {
      */
     @GuardedBy("lock")
     public void transportDataReceived(okio.Buffer frame, boolean endOfStream) {
-      long length = frame.size();
+      // We only support 16 KiB frames, and the max permitted in HTTP/2 is 16 MiB. This is verified
+      // in OkHttp's Http2 deframer. In addition, this code is after the data has been read.
+      int length = (int) frame.size();
       window -= length;
       if (window < 0) {
         frameWriter.rstStream(id(), ErrorCode.FLOW_CONTROL_ERROR);