WIP: Just to not lose this.

Makefile

@@ -651,7 +651,8 @@ OPTIONS_OBJS += src/quic_rx.o src/mux_quic.o src/h3.o src/quic_tx.o	\
                 src/quic_cc_nocc.o src/qpack-dec.o src/quic_cc.o	\
                 src/cfgparse-quic.o src/qmux_trace.o src/qpack-enc.o	\
                 src/qpack-tbl.o src/h3_stats.o src/quic_stats.o		\
-                src/quic_fctl.o src/cbuf.o src/quic_rules.o
+                src/quic_fctl.o src/cbuf.o src/quic_rules.o \
+                src/quic_drs.o src/quic_cc_bbr.o
 endif
 
 ifneq ($(USE_QUIC_OPENSSL_COMPAT:0=),)

include/haproxy/quic_cc-t.h

@@ -36,6 +36,7 @@
 
 extern struct quic_cc_algo quic_cc_algo_nr;
 extern struct quic_cc_algo quic_cc_algo_cubic;
+extern struct quic_cc_algo quic_cc_algo_bbr;
 extern struct quic_cc_algo *default_quic_cc_algo;
 
 /* Fake algorithm with its fixed window */
@@ -80,14 +81,15 @@ struct quic_cc_event {
 enum quic_cc_algo_type {
 	QUIC_CC_ALGO_TP_NEWRENO,
 	QUIC_CC_ALGO_TP_CUBIC,
+	QUIC_CC_ALGO_TP_BBR,
 	QUIC_CC_ALGO_TP_NOCC,
 };
 
 struct quic_cc {
 	/* <conn> is there only for debugging purpose. */
 	struct quic_conn *qc;
 	struct quic_cc_algo *algo;
-	uint32_t priv[18];
+	uint32_t priv[248];
 };
 
 struct quic_cc_path {

include/haproxy/quic_cc_drs.h

@@ -0,0 +1,38 @@
+#include <inttypes.h>
+
+#include <haproxy/window_filter.h>
+
+#define false 0
+#define true  1
+
+/* Rate sample */
+struct quic_rs {
+	uint64_t delivered;
+	uint64_t prior_delivered;
+	uint64_t tx_in_flight;
+	uint64_t lost;
+	uint64_t prior_lost;
+	uint32_t interval;
+	uint32_t prior_time;
+	uint32_t send_elapsed;
+	uint32_t ack_elapsed;
+	uint32_t is_app_limited;
+};
+
+/* Delivery rate sampling */
+struct quic_drs {
+	struct quic_rs rs;
+	struct wf wf;
+	uint64_t round_count;
+	uint64_t next_round_delivered;
+	uint64_t delivered;
+	uint64_t lost;
+	uint32_t delivered_ts;
+	uint32_t first_sent_ts;
+	int is_cwnd_limited; /* boolean */
+	int app_limited; /* boolean */
+};
+
+extern struct pool_head *pool_head_quic_drs;
+
+void quic_cc_drs_init(struct quic_drs *drs);

src/quic_cc.c

@@ -22,7 +22,7 @@
 
 #include <haproxy/quic_cc.h>
 
-struct quic_cc_algo *default_quic_cc_algo = &quic_cc_algo_cubic;
+struct quic_cc_algo *default_quic_cc_algo = &quic_cc_algo_bbr;
 
 /*
  * Initialize <cc> congestion control with <algo> as algorithm depending on <ipv4>