fix: BIO_set_retry_write when BIO_CTRL_FLUSH to allow writer returns …

…WouldBlock on flush
cloudflare · May 11, 2023 · c8daeb8 · c8daeb8
1 parent 7cfe206
commit c8daeb8
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/boring/src/ssl/bio.rs b/boring/src/ssl/bio.rs
@@ -166,9 +166,13 @@ unsafe extern "C" fn ctrl<S: Write>(
     let state = state::<S>(bio);
 
     if cmd == BIO_CTRL_FLUSH {
+        BIO_clear_retry_flags(bio);
         match catch_unwind(AssertUnwindSafe(|| state.stream.flush())) {
             Ok(Ok(())) => 1,
             Ok(Err(err)) => {
+                if retriable_error(&err) {
+                    BIO_set_retry_write(bio);
+                }
                 state.error = Some(err);
                 0
             }