protocol

type DNSHeader struct {
	ID      uint16 `json:"id"`        // an unsigned 16 bit integer containing the transaction id generated by the software who made the request.
	Flags   uint16 `json:"-"`         // an unsigned 16 bit integer containing various service flags that are communicated between the DNS client and the DNS server.
	QDCount uint16 `json:"questions"` // an unsigned 16 bit integer specifying the number of entries in the question section.
	ANCount uint16 `json:"answers"`   // an unsigned 16 bit integer specifying the number of resource records in the answer section.
	NSCount uint16 `json:"-"`         // an unsigned 16 bit integer specifying the number of name server resource records in the authority records section.
	ARCount uint16 `json:"-"`         // an unsigned 16 bit integer specifying the number of resource records in the additional records section.
}

type DNSQuery struct {
	Header   *DNSHeader
	Question *DNSQuestion
}

type DNSQuestion struct {
	QuestionName  []byte // Encoded domain using the RFC 1035 instructions
	QuestionType  uint16 // QTYPE field of RFC 1035
	QuestionClass uint16 // QCLASS field of RFC 1035, default = 1
}

type DNSResource struct {
	Header *DNSResourceHeader
	Data   []byte
}

type DNSResourceHeader struct {
	Name   string `json:"domain"`
	Type   uint16 `json:"type"`
	Class  uint16 `json:"class"`
	TTL    uint32 `json:"ttl"`
	Length uint16 `json:"length"`
}

type DNSResponse struct {
	Header  *DNSHeader
	Answers []*DNSResource
}

type DNSStringAnswer struct {
	Header *DNSResourceHeader `json:"metadata"`
	Data   string             `json:"resource"`
}

type DNSStringResponse struct {
	Header  *DNSHeader         `json:"header"`
	Answers []*DNSStringAnswer `json:"answers"`
}