kcenon::network::protocols::quic::long_header Struct Reference

QUIC Long Header format (RFC 9000 Section 17.2) More...

#include <packet.h>

Collaboration diagram for kcenon::network::protocols::quic::long_header:

Public Member Functions
auto	type () const noexcept -> packet_type
	Get the packet type from first byte.
auto	is_retry () const noexcept -> bool
	Check if this is a Retry packet (has integrity tag, no packet number)

Public Attributes
uint8_t	first_byte {0}
	Header form, fixed bit, type, reserved, PN length.
uint32_t	version {0}
	QUIC version.
connection_id	dest_conn_id
	Destination Connection ID.
connection_id	src_conn_id
	Source Connection ID.
std::vector< uint8_t >	token
	Token (Initial and Retry only)
uint64_t	packet_number {0}
	Packet number (after header protection removal)
size_t	packet_number_length {0}
	Packet number length (1-4 bytes)
std::array< uint8_t, 16 >	retry_integrity_tag {}
	Retry integrity tag (Retry packets only, 16 bytes)

Detailed Description

QUIC Long Header format (RFC 9000 Section 17.2)

Long headers are used during connection establishment. They include source and destination connection IDs.

Format: +-+-+-+-+-+-+-+-+ |1|1|T T|X X X X| First byte: Header Form (1), Fixed Bit (1), +-+-+-+-+-+-+-+-+ Long Packet Type (2), Type-Specific Bits (4) | Version (32) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |DCID Len (8)| +-+-+-+-+-+-+-+-+ |Destination Connection ID (0..160)| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |SCID Len (8)| +-+-+-+-+-+-+-+-+ |Source Connection ID (0..160)| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Definition at line 94 of file packet.h.

Member Function Documentation

is_retry()

auto kcenon::network::protocols::quic::long_header::is_retry ( ) const -> bool

nodiscardnoexcept

Check if this is a Retry packet (has integrity tag, no packet number)

Definition at line 65 of file packet.cpp.

{
    return type() == packet_type::retry;
}

References kcenon::network::protocols::quic::retry, and type().

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type()

auto kcenon::network::protocols::quic::long_header::type ( ) const -> packet_type

nodiscardnoexcept

Get the packet type from first byte.

Returns

Packet type (Initial, 0-RTT, Handshake, or Retry)

Definition at line 60 of file packet.cpp.

{
    return static_cast<packet_type>((first_byte >> 4) & 0x03);
}

References first_byte.

Referenced by is_retry(), and kcenon::network::protocols::quic::packet_parser::parse_long_header().

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Member Data Documentation

dest_conn_id

connection_id kcenon::network::protocols::quic::long_header::dest_conn_id

Destination Connection ID.

Definition at line 98 of file packet.h.

Referenced by kcenon::network::protocols::quic::packet_parser::parse_long_header().

first_byte

uint8_t kcenon::network::protocols::quic::long_header::first_byte {0}

Header form, fixed bit, type, reserved, PN length.

Definition at line 96 of file packet.h.

{0};           

Referenced by kcenon::network::protocols::quic::packet_parser::parse_long_header(), and type().

packet_number

uint64_t kcenon::network::protocols::quic::long_header::packet_number {0}

Packet number (after header protection removal)

Definition at line 103 of file packet.h.

{0};       

packet_number_length

size_t kcenon::network::protocols::quic::long_header::packet_number_length {0}

Packet number length (1-4 bytes)

Definition at line 104 of file packet.h.

{0};  

Referenced by kcenon::network::protocols::quic::packet_parser::parse_long_header().

retry_integrity_tag

std::array<uint8_t, 16> kcenon::network::protocols::quic::long_header::retry_integrity_tag {}

Retry integrity tag (Retry packets only, 16 bytes)

Definition at line 107 of file packet.h.

{};

src_conn_id

connection_id kcenon::network::protocols::quic::long_header::src_conn_id

Source Connection ID.

Definition at line 99 of file packet.h.

Referenced by kcenon::network::protocols::quic::packet_parser::parse_long_header().

token

std::vector<uint8_t> kcenon::network::protocols::quic::long_header::token

Token (Initial and Retry only)

Definition at line 102 of file packet.h.

Referenced by kcenon::network::protocols::quic::packet_parser::parse_long_header().

version

uint32_t kcenon::network::protocols::quic::long_header::version {0}

QUIC version.

Definition at line 97 of file packet.h.

{0};             

Referenced by kcenon::network::protocols::quic::packet_parser::parse_long_header().

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The documentation for this struct was generated from the following files:

• src/internal/protocols/quic/packet.h
• src/protocols/quic/packet.cpp