func UnpackSrcOfAuth(in *bytes.Reader, n uint16, p []byte) (*SrcOfAuth, error) {
if n <= 22 {
return nil, fmt.Errorf("soa with %d bytes", n)
}
ret := new(SrcOfAuth)
was := in.Len()
labels, e := domain.UnpackLabels(in, p)
if e != nil {
return nil, e
}
ret.Mname = labels
labels, e = domain.UnpackLabels(in, p)
if e != nil {
return nil, e
}
ret.Rname = labels
now := in.Len()
if was-now+20 != int(n) {
return nil, errors.New("invalid soa field length")
}
buf := make([]byte, 20)
_, e = in.Read(buf)
if e != nil {
return nil, e
}
ret.Serial = enc.Uint32(buf[0:4])
ret.Refresh = enc.Uint32(buf[4:8])
ret.Retry = enc.Uint32(buf[8:12])
ret.Expire = enc.Uint32(buf[12:16])
ret.Minimum = enc.Uint32(buf[16:20])
return ret, nil
}
func unpackLabels(in *bytes.Reader, n uint16, p []byte) ([]string, error) {
if n == 0 {
return nil, errors.New("zero labels len")
}
was := in.Len()
d, e := domain.UnpackLabels(in, p)
now := in.Len()
if was-now != int(n) {
return nil, fmt.Errorf("domain length expect %d, actual %d",
n, was-now)
}
return d, e
}
