mirror of
https://github.com/Waujito/youtubeUnblock.git
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129 lines
2.9 KiB
C
129 lines
2.9 KiB
C
#ifndef QUIC_H
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#define QUIC_H
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#include "types.h"
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/**
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* @macro
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*
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* :macro:`NGTCP2_INITIAL_SALT_V1` is a salt value which is used to
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* derive initial secret. It is used for QUIC v1.
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*/
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#define QUIC_INITIAL_SALT_V1 \
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"\x38\x76\x2c\xf7\xf5\x59\x34\xb3\x4d\x17\x9a\xe6\xa4\xc8\x0c\xad" \
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"\xcc\xbb\x7f\x0a"
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/**
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* @macro
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*
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* :macro:`NGTCP2_INITIAL_SALT_V2` is a salt value which is used to
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* derive initial secret. It is used for QUIC v2.
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*/
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#define QUIC_INITIAL_SALT_V2 \
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"\x0d\xed\xe3\xde\xf7\x00\xa6\xdb\x81\x93\x81\xbe\x6e\x26\x9d\xcb" \
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"\xf9\xbd\x2e\xd9"
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#define QUIC_INITIAL_TYPE 0
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#define QUIC_0_RTT_TYPE 1
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#define QUIC_HANDSHAKE_TYPE 2
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#define QUIC_RETRY_TYPE 3
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#define QUIC_INITIAL_TYPE_V1 0b00
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#define QUIC_0_RTT_TYPE_V1 0b01
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#define QUIC_HANDSHAKE_TYPE_V1 0b10
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#define QUIC_RETRY_TYPE_V1 0b11
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#define quic_convtype_v1(type) (type)
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#define QUIC_INITIAL_TYPE_V2 0b01
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#define QUIC_0_RTT_TYPE_V2 0b10
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#define QUIC_HANDSHAKE_TYPE_V2 0b11
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#define QUIC_RETRY_TYPE_V2 0b00
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#define quic_convtype_v2(type) (((type) + 1) & 0b11)
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#define QUIC_V1 1 // RFC 9000
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#define QUIC_V2 0x6b3343cf // RFC 9369
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static const uint32_t supported_versions[] = {
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QUIC_V1,
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QUIC_V2,
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};
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/**
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* Quic Large Header
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*/
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struct quic_lhdr {
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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uint8_t number_length:2;
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uint8_t reserved:2;
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uint8_t type:2;
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uint8_t fixed:1;
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uint8_t form:1;
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#elif __BYTE_ORDER == __BIG_ENDIAN
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uint8_t form:1;
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uint8_t fixed:1;
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uint8_t type:2;
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uint8_t reserved:2;
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uint8_t number_length:2;
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#else
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#error "Undefined endian"
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#endif
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uint32_t version;
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}__attribute__((packed));
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/**
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* Quic Large Header Ids
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* (separated from the original header because of varying dst
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*/
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struct quic_cids {
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uint8_t dst_len;
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uint8_t *dst_id;
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uint8_t src_len;
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uint8_t *src_id;
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};
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/**
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* Parses QUIС raw data (UDP payload) to quic large header and
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* quic payload.
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*
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* \qch_len is sizeof(qch) + qci->dst_len + qci->src_id
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* \payload is Type-Specific payload (#17.2).
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*/
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int quic_parse_data(uint8_t *raw_payload, uint32_t raw_payload_len,
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struct quic_lhdr **qch, uint32_t *qch_len,
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struct quic_cids *qci,
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uint8_t **payload, uint32_t *plen);
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/**
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* Parses QUIC variable-length integer. (#16)
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* \variable is a pointer to the sequence to be parsed
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* (varlen integer in big endian format)
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*
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* \mlen Used to signal about variable length and validate left length
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* in the buffer.
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*/
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uint64_t quic_parse_varlength(uint8_t *variable, uint64_t *mlen);
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// quici stands for QUIC Initial
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/**
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* This structure should be parsed
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*/
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struct quici_hdr {
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uint64_t token_len;
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uint8_t *token;
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uint64_t length;
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uint32_t packet_number;
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};
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/**
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* Parses QUIC initial payload.
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* \inpayload is a raw QUIC payload (payload after quic large header)
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*/
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int quic_parse_initial_message(uint8_t *inpayload, uint32_t inplen,
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const struct quic_lhdr *qch,
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struct quici_hdr *qhdr,
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uint8_t **payload, uint32_t *plen);
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#endif /* QUIC_H */
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