/*
 * quic.h
 *
 *  Created on: 2019-4-4
 *      Author: root
 */

#ifndef _GQUIC_H_
#define _GQUIC_H_

//https://github.com/quicwg/base-drafts/wiki/QUIC-Versions
enum _QUIC_VERSION
{
	QUIC_VERSION_UNKNOWN=0,
	//google
	GQUIC_VERSION_Q001=0x51303031,
	GQUIC_VERSION_Q002=0x51303032,
	GQUIC_VERSION_Q003=0x51303033,
	GQUIC_VERSION_Q004=0x51303034,
	GQUIC_VERSION_Q005=0x51303035,
	GQUIC_VERSION_Q006=0x51303036,
	GQUIC_VERSION_Q007=0x51303037,
	GQUIC_VERSION_Q008=0x51303038,
	GQUIC_VERSION_Q009=0x51303039,
	
	GQUIC_VERSION_Q010=0x51303130,
	GQUIC_VERSION_Q011=0x51303131,
	GQUIC_VERSION_Q012=0x51303132,
	GQUIC_VERSION_Q013=0x51303133,
	GQUIC_VERSION_Q014=0x51303134,
	GQUIC_VERSION_Q015=0x51303135,
	GQUIC_VERSION_Q016=0x51303136,
	GQUIC_VERSION_Q017=0x51303137,
	GQUIC_VERSION_Q018=0x51303138,
	GQUIC_VERSION_Q019=0x51303139,
	
	GQUIC_VERSION_Q020=0x51303230,
	GQUIC_VERSION_Q021=0x51303231,
	GQUIC_VERSION_Q022=0x51303332,
	GQUIC_VERSION_Q023=0x51303333,
	GQUIC_VERSION_Q024=0x51303234,
	GQUIC_VERSION_Q025=0x51303235,
	GQUIC_VERSION_Q026=0x51303236,
	GQUIC_VERSION_Q027=0x51303237,
	GQUIC_VERSION_Q028=0x51303238,
	GQUIC_VERSION_Q029=0x51303239,
	
	GQUIC_VERSION_Q030=0x51303330,
	GQUIC_VERSION_Q031=0x51303331,
	GQUIC_VERSION_Q032=0x51303332,
	GQUIC_VERSION_Q033=0x51303333,
	GQUIC_VERSION_Q034=0x51303334,
	GQUIC_VERSION_Q035=0x51303335,
	GQUIC_VERSION_Q036=0x51303336,
	GQUIC_VERSION_Q037=0x51303337,
	GQUIC_VERSION_Q038=0x51303338,
	GQUIC_VERSION_Q039=0x51303339,

	GQUIC_VERSION_Q040=0x51303430,
	GQUIC_VERSION_Q041=0x51303431,
	GQUIC_VERSION_Q042=0x51303432,
	GQUIC_VERSION_Q043=0x51303433,
	GQUIC_VERSION_Q044=0x51303434,
	GQUIC_VERSION_Q045=0x51303435,
	GQUIC_VERSION_Q046=0x51303436,
	GQUIC_VERSION_Q047=0x51303437,
	GQUIC_VERSION_Q048=0x51303438,  //Google QUIC with TLS
	GQUIC_VERSION_Q049=0x51303439,	//Google QUIC with TLS

    GQUIC_VERSION_Q050=0x51303530,
    GQUIC_VERSION_Q051=0x51303531,
    GQUIC_VERSION_Q052=0x51303532,
    GQUIC_VERSION_Q053=0x51303533,
    GQUIC_VERSION_Q054=0x51303534,
    GQUIC_VERSION_Q055=0x51303535,
    GQUIC_VERSION_Q056=0x51303536,
    GQUIC_VERSION_Q057=0x51303537,
    GQUIC_VERSION_Q058=0x51303538,
    GQUIC_VERSION_Q059=0x51303539,
    
    GQUIC_VERSION_Q099=0x51303939,

	//Google Proxied QUIC
	PQUIC_VERSION_PROX=0x50524f58
	//GOQUIC_VERSION_GO=0x51474f[0-255],
	//quicly
	//QUICKLY_VERSION_QUICLY=0x91c170[0-255]

	//IETF
	//IQUIC_VERSION_=0xf10000

};


#define QUIC_INTEREST_KEY		    (1<<QUIC_INTEREST_KEY_MASK)
#define QUIC_CLIENT_HELLO		    (1<<QUIC_CLIENT_HELLO_MASK)
#define QUIC_SERVER_HELLO		    (1<<QUIC_SERVER_HELLO_MASK)
#define QUIC_CACHED_CERT		    (1<<QUIC_CACHED_CERT_MASK)
#define QUIC_COMM_CERT		        (1<<QUIC_COMM_CERT_MASK)
#define QUIC_CERT_CHAIN		        (1<<QUIC_CERT_CHAIN_MASK)
#define QUIC_APPLICATION_DATA	    (1<<QUIC_APPLICATION_DATA_MASK)
#define QUIC_USEING_VERSION			(1<<QUIC_USEING_VERSION_MASK)
#define QUIC_NEGOTIATION_VERSION	(1<<QUIC_NEGOTIATION_VERSION_MASK)
#define QUIC_REJECTION			    (1<<QUIC_REJECTION_MASK)


enum quic_interested_region
{
	QUIC_INTEREST_KEY_MASK = 0,
	QUIC_CLIENT_HELLO_MASK,
	QUIC_SERVER_HELLO_MASK,
	QUIC_CACHED_CERT_MASK,
	QUIC_COMM_CERT_MASK,
	QUIC_CERT_CHAIN_MASK,
	QUIC_APPLICATION_DATA_MASK,
	QUIC_USEING_VERSION_MASK,
	QUIC_NEGOTIATION_VERSION_MASK,
	QUIC_REJECTION_MASK
};

typedef struct _quic_tlv
{
    unsigned int type;
	unsigned int length;
	void	*value;
}quic_tlv_t;

#define	MAX_CONNECT_ID_LEN	18

struct _quic_public_header
{
	unsigned char public_flags;
	unsigned char is_reset;
	unsigned char is_sepcial_packet;	// special Packets
	unsigned char is_version_negotiation;
	unsigned char server_CID_len;
	unsigned char client_CID_len;
	unsigned char negotiation_version_num;
	unsigned int quic_version;
	unsigned long long packet_number;
	unsigned char server_CID[MAX_CONNECT_ID_LEN];  ////use first 8 bytes if GQUIC version 1~43
	unsigned char client_CID[MAX_CONNECT_ID_LEN]; // no used if GQUIC version 1~43
	unsigned int *negotiation_version_list;
};
struct _gquic_frame_header
{
	unsigned char frame_type;
	unsigned char fin_state;
	unsigned short data_len;
	unsigned int stream_id;
	unsigned long long offset;
};


struct _quic_stream 
{
	unsigned char count;
	unsigned char sni_idx;
	unsigned char ua_idx;
	unsigned char ver_idx;
	unsigned int ext_tag_num; //number of extensions or tags
	quic_tlv_t *ext_tags;    //extensions or tags
};

struct _quic_info
{
	struct _quic_stream *rejection;
	struct _quic_stream *client_hello;
	struct _quic_stream *server_hello;
	struct _gquic_frame_header frame_hdr;
	struct _quic_public_header quic_hdr;
};

struct _quic_context
{
	int is_quic;
	int link_state;
	int call_business;
	void *business_pme;
	struct _quic_info quic_info;
};

//buff_len minimun 32bytes
int quic_version_int2string(unsigned int version, char *buff, int buff_len);
int quic_process(struct streaminfo *pstream, struct _quic_context* _context, int thread_seq, void* a_packet);

int quic_init_stream(void **pme, int thread_seq);  // **pme=(struct _quic_context* )
void quic_release_stream(struct streaminfo *a_tcp, void **pme, int thread_seq);
enum _QUIC_VERSION is_quic_protocol(struct streaminfo *pstream, struct _quic_context* _context, char *payload, int payload_len, int *used_len);

#endif /* SRC_GQUIC_H_ */