WIP: quic: implement BBR congestion control algo for QUIC

Author: haproxyFred

Makefile

@@ -652,7 +652,8 @@ OPTIONS_OBJS += src/quic_rx.o src/mux_quic.o src/h3.o src/quic_tx.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_token.o src/quic_pacing.o src/quic_cc_drs.o
+                src/quic_token.o src/quic_pacing.o src/quic_cc_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 */
@@ -81,14 +82,15 @@ 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[20];
+	uint32_t priv[116];
 };
 
 struct quic_cc_path {
@@ -116,6 +118,7 @@ struct quic_cc_path {
 	/* Number of in flight ack-eliciting packets. */
 	uint64_t ifae_pkts;
 	uint64_t delivery_rate; /* bytes per second */
+	size_t send_quantum;
 };
 
 struct quic_cc_algo {

include/haproxy/quic_cc.h

@@ -95,6 +95,7 @@ static inline void quic_cc_path_init(struct quic_cc_path *path, int ipv4, unsign
 	path->ifae_pkts = 0;
 	quic_cc_init(&path->cc, algo, qc);
 	path->delivery_rate = 0;
+	path->send_quantum = path->mtu * 10;
 }
 
 /* Return the remaining <room> available on <path> QUIC path for prepared data