protocol

type DNSFlags struct {
	QueryResponse       fields.MessageType  `json:"query_response"`
	OpCode              fields.OpCode       `json:"op_code"`
	AuthoritativeAnswer bool                `json:"authoritative_answer"`
	Truncated           bool                `json:"truncated"`
	RecursionDesired    bool                `json:"recursion_desired"`
	RecursionAvailable  bool                `json:"recursion_available"`
	ResponseCode        fields.ResponseCode `json:"response_code"`
}

type DNSHeader struct {
	Identifier                     uint16 `json:"identifier"`
	Flags                          uint16 `json:"flags"`
	TotalQuestions                 uint16 `json:"num_questions"`
	TotalAnswerResourceRecords     uint16 `json:"num_answers"`
	TotalAuthorityResourceRecords  uint16 `json:"num_authority"`
	TotalAdditionalResourceRecords uint16 `json:"num_additional"`
}

type DNSPDU struct {
	Header                    DNSHeader           `json:"header"`
	Flags                     DNSFlags            `json:"flags"`
	Questions                 []DNSQuestion       `json:"questions"`
	AnswerResourceRecords     []DNSResourceRecord `json:"answers"`
	AuthorityResourceRecords  []DNSResourceRecord `json:"authority"`
	AdditionalResourceRecords []DNSResourceRecord `json:"additional"`
}

type DNSQuestion struct {
	Labels []string           `json:"labels"`
	Type   fields.RecordType  `json:"type"`
	Class  fields.RecordClass `json:"class"`
}

type DNSResourceRecord struct {
	Labels             []string           `json:"labels"`
	Type               fields.RecordType  `json:"type"`
	Class              fields.RecordClass `json:"class"`
	TimeToLive         uint32             `json:"ttl"`
	ResourceDataLength uint16             `json:"rd_length"`
	ResourceData       []byte             `json:"rd"`
}