BUG/MINOR: quic: Missing probing packets when coalescing
Before having a look at the next encryption level to build packets if there is
no more ack-eliciting frames to send we must check we have not to probe from
the current encryption level anymore. If not, we only send one datagram instead
of sending two datagrams giving less chance to recover from packet loss.
diff --git a/src/xprt_quic.c b/src/xprt_quic.c
index bac4ab3..253aa85 100644
--- a/src/xprt_quic.c
+++ b/src/xprt_quic.c
@@ -2882,7 +2882,7 @@
* select the next level.
*/
if ((tel == QUIC_TLS_ENC_LEVEL_INITIAL || tel == QUIC_TLS_ENC_LEVEL_HANDSHAKE) &&
- (LIST_ISEMPTY(&qel->pktns->tx.frms))) {
+ (LIST_ISEMPTY(&qel->pktns->tx.frms) && !qel->pktns->tx.pto_probe)) {
/* If QUIC_TLS_ENC_LEVEL_HANDSHAKE was already reached let's try QUIC_TLS_ENC_LEVEL_APP */
if (tel == QUIC_TLS_ENC_LEVEL_HANDSHAKE && next_tel == tel)
next_tel = QUIC_TLS_ENC_LEVEL_APP;