MINOR: quic: define quic_pacing module

Add a new module quic_pacing. A new structure quic_pacer is defined.
This will be used as a pacing engine to implement smooth emission of
QUIC data.

Author: a-denoyelle

Makefile

@@ -653,7 +653,7 @@ 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_token.o src/quic_pacing.o
 endif
 
 ifneq ($(USE_QUIC_OPENSSL_COMPAT:0=),)

include/haproxy/quic_conn.h

@@ -45,6 +45,7 @@
 #include <haproxy/quic_enc.h>
 #include <haproxy/quic_frame.h>
 #include <haproxy/quic_loss.h>
+#include <haproxy/quic_pacing.h>
 #include <haproxy/quic_rx.h>
 #include <haproxy/mux_quic.h>
 

include/haproxy/quic_pacing-t.h

@@ -0,0 +1,11 @@
+#ifndef _HAPROXY_QUIC_PACING_T_H
+#define _HAPROXY_QUIC_PACING_T_H
+
+#include <haproxy/api-t.h>
+#include <haproxy/quic_cc-t.h>
+
+struct quic_pacer {
+	const struct quic_cc *cc; /* Congestion controler algo used for this connection */
+};
+
+#endif /* _HAPROXY_QUIC_PACING_T_H */

include/haproxy/quic_pacing.h

@@ -0,0 +1,15 @@
+#ifndef _HAPROXY_QUIC_PACING_H
+#define _HAPROXY_QUIC_PACING_H
+
+#include <haproxy/quic_pacing-t.h>
+
+#include <haproxy/list.h>
+#include <haproxy/quic_frame.h>
+
+static inline void quic_pacing_init(struct quic_pacer *pacer,
+                                    const struct quic_cc *cc)
+{
+	pacer->cc = cc;
+}
+
+#endif /* _HAPROXY_QUIC_PACING_H */

src/quic_pacing.c

@@ -0,0 +1 @@
+#include <haproxy/quic_pacing.h>