Module header 

Structs

Flags

See https://datatracker.ietf.org/doc/html/rfc6762#autoid-48

Header

See https://datatracker.ietf.org/doc/html/rfc1035#autoid-40 与标准 DNS 不同，flags 字段的 zero 3bits 后两 bits 用于 AD、CD See https://datatracker.ietf.org/doc/html/rfc6762#autoid-48

Enums

Opcode

The OPCODE value according to RFC 1035

ResponseCode

Traits

WriteHeader

Functions

be_header