/*
 * gquic_process.h
 *
 *  Created on: 2019��4��2��
 *      Author: root
 */

#ifndef SRC_GQUIC_GQUIC_PROCESS_H_
#define SRC_GQUIC_GQUIC_PROCESS_H_

#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>

#include "gquic.h"

#define VERSION_LEN  4
#define VER_Q046                   0x51303436
/**************************************************************************/
/*                      Public flag                                       */
/**************************************************************************/


#define PACKET_PUBLIC_FLAGS_MAX 0x7f
#define PUBLIC_FLAG_VER_FST_BYTE         0x51
#define PUBLIC_FLAG_VER         0x01
#define PUBLIC_FLAG_RST         0x02
#define PUBLIC_FLAG_NONCE       0x04
#define BYTE_CNTID_8            0x08
#define BYTE_CNTID_0            0x00
enum gquic_connid_len {
  PACKET_0BYTE_CONNECTION_ID = 0,
  PACKET_8BYTE_CONNECTION_ID = 8
};

#define PKT_NUM_6               0x30
#define PKT_NUM_4               0x20
#define PKT_NUM_2               0x10
#define PKT_NUM_1               0x00

//enum gquic_pkt_num_len {
//  PACKET_1BYTE_PACKET_NUMBER = 1,
//  PACKET_2BYTE_PACKET_NUMBER = 2,
//  PACKET_4BYTE_PACKET_NUMBER = 4,
//  PACKET_6BYTE_PACKET_NUMBER = 6
//};

// Used to indicate a QuicSequenceNumberLength using two flag bits.
enum gquic_pkt_num_len_flags {
  PACKET_FLAGS_1BYTE_PACKET = 0,           // 00
  PACKET_FLAGS_2BYTE_PACKET = 1,           // 01
  PACKET_FLAGS_4BYTE_PACKET = 1 << 1,      // 10
  PACKET_FLAGS_6BYTE_PACKET = 1 << 1 | 1,  // 11
};

//#define PUBLIC_FLAG_MULTIPATH   0x40
#define UNUSE                   0x80
#define MSG_AUTH_HASH_LEN       12
#define PUB_HEAD_SEQ_SFT        4

/**************************************************************************/
/*                      Frame type                                       */
/**************************************************************************/
#define FRAM_SPECIAL                0xE0
#define STREAM 				        0x80
#define STREAM_F                    0x40           //fin
#define STREAM_D                    0x20           //data length
#define STREAM_OOO                  0x1C           //offset length
#define STREAM_SS                   0x03           //stream length
#define ACK 						0x40
#define ACK_LL                      0x0c
#define ACK_MM                      0x03
#define ACK_N                       0x20
#define CONGESTION_FEEDBACK 		0x20
#define PADDING 		 			0x00
#define RST_STREAM			 		0x01
#define CONNECTION_CLOSE 			0x02
#define GOAWAY 						0x03
#define WINDOW_UPDATE 		 		0x04
#define BLOCKED 		 			0x05
#define STOP_WAITING 		 		0x06
#define PING	 		 			0x07


#define STREAM_ID_1BYTE  0x00
#define STREAM_ID_2BYTE  0x01
#define STREAM_ID_3BYTE  0x02
#define STREAM_ID_4BYTE  0x03


enum frame_type_t{
	FRAME_UNKNOWN = 0,
	FRAME_STREAM,
	FRAME_ACK,
	FRAME_CONGESTION_FEEDBACK,
	FRAME_PADDING,
	FRAME_RST_STREAM,
	FRAME_CONNECTION_CLOSE,
	FRAME_GOAWAY,
	FRAME_WINDOW_UPDATE,
	FRAME_BLOCKED,
	FRAME_STOP_WAITING,
	FRAME_PING
};

/**************************************************************************/
/*                      Message tag                                       */
/**************************************************************************/
#define CHLO 0x43484C4F
#define SHLO 0x53484C4F
#define REJ  0x52454A00
#define PRST 0x50525354

enum message_tag_t{
	MTAG_UNKNOWN = 0,
    MTAG_CHLO,
    MTAG_SHLO,
    MTAG_REJ,
    MTAG_PRST
};

struct gquic_frame_hdr{
	enum frame_type_t frame_type;
	UCHAR is_fin;
	UCHAR data_len_byte;
	UCHAR offset_len;
	UCHAR stream_id_len;
	UINT8 stream_id;
	UINT16 data_len;
	UCHAR padding_len;
	enum message_tag_t tag;
	UINT32 tag_num;
};

struct gquic_pkt_hdr{
	UINT64 connection_id;
	int connection_id_len;
	UINT8 nonce_flag;
	UINT8 reset_flag;
	UINT8 version_flag;
	UINT32 packet_number_len;
	UINT32 version;
	UINT8 version_int8;
	UINT32 packet_number;
	UCHAR auth_hash[MSG_AUTH_HASH_LEN];
//	struct gquic_frame_hdr* frame_hdr;
};

/**************************************************************************/
/*                      Tag                                               */
/**************************************************************************/
#define TAG_PAD  0x50414400
#define TAG_SNI  0x534E4900
#define TAG_VER  0x56455200
#define TAG_CCS  0x43435300
#define TAG_UAID 0x55414944
#define TAG_PDMD 0x50444d44
#define TAG_STK  0x53544b00
#define TAG_SNO  0x534E4F00
#define TAG_PROF 0x50524F46
#define TAG_SCFG 0x53434647
#define TAG_RREJ 0x5252454A
#define TAG_CRT  0x435254FF
#define TAG_AEAD 0x41454144
#define TAG_SCID 0x53434944
#define TAG_PUBS 0x50554253
#define TAG_KEXS 0x4B455853
#define TAG_OBIT 0x4F424954
#define TAG_EXPY 0x45585059
#define TAG_NONC 0x4E4F4E43
#define TAG_MSPC 0x4D535043
#define TAG_TCID 0x54434944
#define TAG_SRBF 0x53524246
#define TAG_ICSL 0x4943534C
#define TAG_SCLS 0x53434C53
#define TAG_COPT 0x434F5054
#define TAG_CCRT 0x43435254
#define TAG_IRTT 0x49525454
#define TAG_CFCW 0x43464357
#define TAG_SFCW 0x53464357
#define TAG_CETV 0x43455456
#define TAG_XLCT 0x584C4354
#define TAG_NONP 0x4E4F4E50
#define TAG_CSCT 0x43534354
#define TAG_CTIM 0x4354494D
#define TAG_MIDS 0x4D494453
#define TAG_FHOL 0x46484F4C
#define TAG_STTL 0x5354544C
#define TAG_SMHL 0x534D484C
#define TAG_TBKP 0x54424B50

/* Public Reset Tag */
#define TAG_RNON 0x524E4F4E
#define TAG_RSEQ 0x52534551
#define TAG_CADR 0x43414452



UINT8 gquic_process(struct streaminfo *pstream, struct quic_stream* a_quic_stream, int thread_seq, void* a_packet);
UINT32 read_offset_len(UINT8 frame_type);
UINT32 read_stream_len(UINT8 frame_type);
UINT32 read_largest_observed_len(UINT8 frame_type);
UINT32 read_missing_packet_len(UINT8 frame_type);

UINT32 get_stream_id(char* g_data_t, UINT8 frame_type, UINT32 *skip_len);
UINT32 read_seq_num_len(UINT8 flags);
int read_conn_id_len(UINT8 flags);


#endif