seiso.moe
1package magna
2
3import "encoding/binary"
4
5// Decode decodes a question from buf at the offset
6func (q *Question) Decode(buf []byte, offset int) (int, error) {
7 var err error
8 q.QName, offset, err = decode_domain(buf, offset)
9 if err != nil {
10 return offset, err
11 }
12
13 qtype, offset, err := getU16(buf, offset)
14 if err != nil {
15 return offset, err
16 }
17
18 qclass, offset, err := getU16(buf, offset)
19 if err != nil {
20 return offset, err
21 }
22
23 q.QType = DNSType(qtype)
24 q.QClass = DNSClass(qclass)
25 return offset, nil
26}
27
28// Encode serializes a Question into bytes, using a map to handle domain name compression offsets.
29func (q *Question) Encode(bytes []byte, offsets *map[string]uint16) []byte {
30 bytes = encode_domain(bytes, q.QName, offsets)
31 bytes = binary.BigEndian.AppendUint16(bytes, uint16(q.QType))
32 bytes = binary.BigEndian.AppendUint16(bytes, uint16(q.QClass))
33 return bytes
34}