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package dns
import "fmt"
type TXT struct {
Txt []string
}
func (t *TXT) Type() uint16 {
return TypeTXT
}
func (t *TXT) Pack(p *packer) error {
for _, s := range t.Txt {
if len(s) > 255 {
return fmt.Errorf("dns: txt string > 255 octets")
}
p.buf = append(p.buf, byte(len(s)))
p.buf = append(p.buf, s...)
}
return nil
}
func (t *TXT) Unpack(u *unpacker, length uint16) error {
end := u.off + int(length)
for u.off < end {
if u.off >= len(u.buf) {
return fmt.Errorf("dns: short txt")
}
l := int(u.buf[u.off])
u.off++
if u.off+l > end {
return fmt.Errorf("dns: txt string overflow")
}
t.Txt = append(t.Txt, string(u.buf[u.off:u.off+l]))
u.off += l
}
return nil
}
func (t *TXT) String() string {
return fmt.Sprintf("%v", t.Txt)
}
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