Lengthen PATH_CHALLENGE timeout
@@ -2971,7 +2971,7 @@ static ssize_t conn_write_path_challenge(ngtcp2_conn *conn, ngtcp2_path *path,
/* TODO reconsider this. This might get larger pretty quickly than
validation timeout which is just around 3*PTO. */
- expiry = ts + NGTCP2_DEFAULT_INITIAL_RTT * (1ull << pv->loss_count);
+ expiry = ts + 6 * NGTCP2_DEFAULT_INITIAL_RTT * (1ull << pv->loss_count);
ngtcp2_pv_add_entry(pv, lfr.path_challenge.data, expiry);
