new file mode 100644
--- /dev/null
+++ b/src/event/quic/ngx_event_quic_output.h
@@ -0,0 +1,40 @@
+
+/*
+ * Copyright (C) Nginx, Inc.
+ */
+
+
+#ifndef _NGX_EVENT_QUIC_OUTPUT_H_INCLUDED_
+#define _NGX_EVENT_QUIC_OUTPUT_H_INCLUDED_
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+
+
+size_t ngx_quic_max_udp_payload(ngx_connection_t *c);
+
+ngx_int_t ngx_quic_output(ngx_connection_t *c);
+
+ngx_int_t ngx_quic_negotiate_version(ngx_connection_t *c,
+    ngx_quic_header_t *inpkt);
+
+int ngx_quic_send_alert(ngx_ssl_conn_t *ssl_conn,
+    enum ssl_encryption_level_t level, uint8_t alert);
+
+ngx_int_t ngx_quic_send_stateless_reset(ngx_connection_t *c,
+    ngx_quic_conf_t *conf, ngx_quic_header_t *pkt);
+ngx_int_t ngx_quic_send_cc(ngx_connection_t *c);
+ngx_int_t ngx_quic_send_early_cc(ngx_connection_t *c,
+    ngx_quic_header_t *inpkt, ngx_uint_t err, const char *reason);
+
+ngx_int_t ngx_quic_send_retry(ngx_connection_t *c,
+    ngx_quic_conf_t *conf, ngx_quic_header_t *pkt);
+ngx_int_t ngx_quic_send_new_token(ngx_connection_t *c);
+
+ngx_int_t ngx_quic_send_ack(ngx_connection_t *c,
+    ngx_quic_send_ctx_t *ctx);
+ngx_int_t ngx_quic_send_ack_range(ngx_connection_t *c,
+    ngx_quic_send_ctx_t *ctx, uint64_t smallest, uint64_t largest);
+
+#endif /* _NGX_EVENT_QUIC_OUTPUT_H_INCLUDED_ */