ngtcp2: use overflow buffer for extra HTTP/3 data

Fixes #4525
Closes #4603

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/http.h b/lib/http.h
index 87e979ee2..70d5dccec 100644
--- a/lib/http.h
+++ b/lib/http.h
@@ -193,6 +193,7 @@ struct HTTP {
 #ifdef ENABLE_QUIC
   /*********** for HTTP/3 we store stream-local data here *************/
   int64_t stream3_id; /* stream we are interested in */
+  bool firstheader;  /* FALSE until headers arrive */
   bool firstbody;  /* FALSE until body arrives */
   bool h3req;    /* FALSE until request is issued */
   bool upload_done;
@@ -200,6 +201,9 @@ struct HTTP {
 #ifdef USE_NGHTTP3
   size_t unacked_window;
   struct h3out *h3out; /* per-stream buffers for upload */
+  char *overflow_buf; /* excess data received during a single Curl_read */
+  size_t overflow_buflen; /* amount of data currently in overflow_buf */
+  size_t overflow_bufsize; /* size of the overflow_buf allocation */
 #endif
 };