From: Christopher Faulet <cfaulet@haproxy.com>
Date: Tue, 4 Jun 2024 17:01:18 +0000 (+0200)
Subject: MINOR: mux-quic: Don't send an emtpy H3 DATA frame during zero-copy forwarding
X-Git-Tag: v3.1-dev1~64
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=6697e87ae5e1f569dc87cf690b5ecfc049c4aab0;p=thirdparty%2Fhaproxy.git

MINOR: mux-quic: Don't send an emtpy H3 DATA frame during zero-copy forwarding

It may only happens when there is no data to forward but a last stream frame
must be sent with the FIN bit. It is not invalid, but it is useless to send
an empty H3 DATA frame in that case.
---

diff --git a/src/mux_quic.c b/src/mux_quic.c
index 8272b93da7..97cfb27ce0 100644
--- a/src/mux_quic.c
+++ b/src/mux_quic.c
@@ -3058,7 +3058,8 @@ static size_t qmux_strm_done_ff(struct stconn *sc)
 		goto end;
 	}
 
-	data += sd->iobuf.offset;
+	if (data)
+		data += sd->iobuf.offset;
 	total = qcs->qcc->app_ops->done_ff(qcs);
 
 	if (data || qcs->flags & QC_SF_FIN_STREAM)