[PATCH net-next 2/5] net: include quic.h in include/uapi/linux for QUIC protocol

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This commit introduces quic.h to the include/uapi/linux directory,
providing header file with necessary definitions for QUIC. Including
quic.h enables both user space applications and kernel consumers to
access QUIC-related Send/Receive Control Messages, Socket Options and
Events/Notifications APIs.

Signed-off-by: Xin Long <lucien.xin@xxxxxxxxx>
Signed-off-by: Moritz Buhl <mbuhl@xxxxxxxxxxx>
Signed-off-by: Tyler Fanelli <tfanelli@xxxxxxxxxx>
Signed-off-by: Pengtao He <hepengtao@xxxxxxxxxx>
---
 include/uapi/linux/quic.h | 192 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 192 insertions(+)
 create mode 100644 include/uapi/linux/quic.h

diff --git a/include/uapi/linux/quic.h b/include/uapi/linux/quic.h
new file mode 100644
index 000000000000..aab7b85838d6
--- /dev/null
+++ b/include/uapi/linux/quic.h
@@ -0,0 +1,192 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
+/* QUIC kernel implementation
+ * (C) Copyright Red Hat Corp. 2023
+ *
+ * This file is part of the QUIC kernel implementation
+ *
+ * Written or modified by:
+ *    Xin Long <lucien.xin@xxxxxxxxx>
+ */
+
+#ifndef __uapi_quic_h__
+#define __uapi_quic_h__
+
+#include <linux/socket.h>
+#ifdef __KERNEL__
+#include <linux/types.h>
+#else
+#include <stdint.h>
+#endif
+
+/* Send or Receive Options APIs */
+enum quic_cmsg_type {
+	QUIC_STREAM_INFO,
+	QUIC_HANDSHAKE_INFO,
+};
+
+#define QUIC_STREAM_TYPE_SERVER_MASK	0x01
+#define QUIC_STREAM_TYPE_UNI_MASK	0x02
+#define QUIC_STREAM_TYPE_MASK		0x03
+
+enum quic_msg_flags {
+	/* flags for stream_flags */
+	MSG_STREAM_NEW		= 0x400,
+	MSG_STREAM_FIN		= 0x200,
+	MSG_STREAM_UNI		= 0x800,
+	MSG_STREAM_DONTWAIT	= 0x10000,
+
+	/* extented flags for msg_flags */
+	MSG_DATAGRAM		= 0x10,
+	MSG_NOTIFICATION	= 0x8000,
+};
+
+enum quic_crypto_level {
+	QUIC_CRYPTO_APP,
+	QUIC_CRYPTO_INITIAL,
+	QUIC_CRYPTO_HANDSHAKE,
+	QUIC_CRYPTO_EARLY,
+	QUIC_CRYPTO_MAX,
+};
+
+struct quic_handshake_info {
+	uint8_t	crypto_level;
+};
+
+struct quic_stream_info {
+	int64_t  stream_id;
+	uint32_t stream_flags;
+};
+
+/* Socket Options APIs */
+#define QUIC_SOCKOPT_EVENT				0
+#define QUIC_SOCKOPT_STREAM_OPEN			1
+#define QUIC_SOCKOPT_STREAM_RESET			2
+#define QUIC_SOCKOPT_STREAM_STOP_SENDING		3
+#define QUIC_SOCKOPT_CONNECTION_CLOSE			4
+#define QUIC_SOCKOPT_CONNECTION_MIGRATION		5
+#define QUIC_SOCKOPT_KEY_UPDATE				6
+#define QUIC_SOCKOPT_TRANSPORT_PARAM			7
+#define QUIC_SOCKOPT_CONFIG				8
+#define QUIC_SOCKOPT_TOKEN				9
+#define QUIC_SOCKOPT_ALPN				10
+#define QUIC_SOCKOPT_SESSION_TICKET			11
+#define QUIC_SOCKOPT_CRYPTO_SECRET			12
+#define QUIC_SOCKOPT_TRANSPORT_PARAM_EXT		13
+#define QUIC_SOCKOPT_RETIRE_CONNECTION_ID		14
+#define QUIC_SOCKOPT_ACTIVE_CONNECTION_ID		15
+
+#define QUIC_VERSION_V1			0x1
+#define QUIC_VERSION_V2			0x6b3343cf
+
+struct quic_transport_param {
+	uint8_t		remote;
+	uint8_t		disable_active_migration;
+	uint8_t		grease_quic_bit;
+	uint8_t		stateless_reset;
+	uint8_t		disable_1rtt_encryption;
+	uint8_t		disable_compatible_version;
+	uint64_t	max_udp_payload_size;
+	uint64_t	ack_delay_exponent;
+	uint64_t	max_ack_delay;
+	uint64_t	active_connection_id_limit;
+	uint64_t	max_idle_timeout;
+	uint64_t	max_datagram_frame_size;
+	uint64_t	max_data;
+	uint64_t	max_stream_data_bidi_local;
+	uint64_t	max_stream_data_bidi_remote;
+	uint64_t	max_stream_data_uni;
+	uint64_t	max_streams_bidi;
+	uint64_t	max_streams_uni;
+};
+
+struct quic_config {
+	uint32_t	version;
+	uint32_t	plpmtud_probe_interval;
+	uint64_t	initial_smoothed_rtt;
+	uint8_t		congestion_control_algo;
+	uint8_t		validate_peer_address;
+	uint32_t	payload_cipher_type;
+	uint8_t		receive_session_ticket;
+	uint8_t		certificate_request;
+};
+
+struct quic_crypto_secret {
+	uint8_t send;  /* send or recv */
+	uint8_t level; /* crypto level */
+	uint32_t type; /* TLS_CIPHER_* */
+	uint8_t secret[48];
+};
+
+enum {
+	QUIC_CONG_ALG_RENO,
+	QUIC_CONG_ALG_CUBIC,
+	QUIC_CONG_ALG_MAX,
+};
+
+struct quic_errinfo {
+	uint64_t stream_id;
+	uint32_t errcode;
+};
+
+struct quic_connection_id_info {
+	uint32_t source;
+	uint32_t dest;
+};
+
+struct quic_event_option {
+	uint8_t type;
+	uint8_t on;
+};
+
+/* Event APIs */
+enum quic_event_type {
+	QUIC_EVENT_NONE,
+	QUIC_EVENT_STREAM_UPDATE,
+	QUIC_EVENT_STREAM_MAX_STREAM,
+	QUIC_EVENT_CONNECTION_CLOSE,
+	QUIC_EVENT_CONNECTION_MIGRATION,
+	QUIC_EVENT_KEY_UPDATE,
+	QUIC_EVENT_NEW_TOKEN,
+	QUIC_EVENT_NEW_SESSION_TICKET,
+	QUIC_EVENT_END,
+	QUIC_EVENT_MAX = QUIC_EVENT_END - 1,
+};
+
+enum {
+	QUIC_STREAM_SEND_STATE_READY,
+	QUIC_STREAM_SEND_STATE_SEND,
+	QUIC_STREAM_SEND_STATE_SENT,
+	QUIC_STREAM_SEND_STATE_RECVD,
+	QUIC_STREAM_SEND_STATE_RESET_SENT,
+	QUIC_STREAM_SEND_STATE_RESET_RECVD,
+
+	QUIC_STREAM_RECV_STATE_RECV,
+	QUIC_STREAM_RECV_STATE_SIZE_KNOWN,
+	QUIC_STREAM_RECV_STATE_RECVD,
+	QUIC_STREAM_RECV_STATE_READ,
+	QUIC_STREAM_RECV_STATE_RESET_RECVD,
+	QUIC_STREAM_RECV_STATE_RESET_READ,
+};
+
+struct quic_stream_update {
+	uint64_t id;
+	uint32_t state;
+	uint32_t errcode;
+	uint64_t finalsz;
+};
+
+struct quic_connection_close {
+	uint32_t errcode;
+	uint8_t frame;
+	uint8_t phrase[];
+};
+
+union quic_event {
+	struct quic_stream_update update;
+	struct quic_connection_close close;
+	uint64_t max_stream;
+	uint8_t local_migration;
+	uint8_t key_update_phase;
+};
+
+#endif /* __uapi_quic_h__ */
-- 
2.43.0





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