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package dns_test
import (
"strings"
"testing"
"github.com/miekg/dns"
)
const TypeISBN uint16 = 0xFF00
// A crazy new RR type :)
type ISBN struct {
x string // rdata with 10 or 13 numbers, dashes or spaces allowed
}
func NewISBN() dns.PrivateRdata { return &ISBN{""} }
func (rd *ISBN) Len() int { return len([]byte(rd.x)) }
func (rd *ISBN) String() string { return rd.x }
func (rd *ISBN) Parse(txt []string) error {
rd.x = strings.TrimSpace(strings.Join(txt, " "))
return nil
}
func (rd *ISBN) Pack(buf []byte) (int, error) {
b := []byte(rd.x)
n := copy(buf, b)
if n != len(b) {
return n, dns.ErrBuf
}
return n, nil
}
func (rd *ISBN) Unpack(buf []byte) (int, error) {
rd.x = string(buf)
return len(buf), nil
}
func (rd *ISBN) Copy(dest dns.PrivateRdata) error {
isbn, ok := dest.(*ISBN)
if !ok {
return dns.ErrRdata
}
isbn.x = rd.x
return nil
}
var testrecord = strings.Join([]string{"example.org.", "3600", "IN", "ISBN", "12-3 456789-0-123"}, "\t")
func TestPrivateText(t *testing.T) {
dns.PrivateHandle("ISBN", TypeISBN, NewISBN)
defer dns.PrivateHandleRemove(TypeISBN)
rr, err := dns.NewRR(testrecord)
if err != nil {
t.Fatal(err)
}
if rr.String() != testrecord {
t.Errorf("record string representation did not match original %#v != %#v", rr.String(), testrecord)
}
}
func TestPrivateByteSlice(t *testing.T) {
dns.PrivateHandle("ISBN", TypeISBN, NewISBN)
defer dns.PrivateHandleRemove(TypeISBN)
rr, err := dns.NewRR(testrecord)
if err != nil {
t.Fatal(err)
}
buf := make([]byte, 100)
off, err := dns.PackRR(rr, buf, 0, nil, false)
if err != nil {
t.Errorf("got error packing ISBN: %v", err)
}
custrr := rr.(*dns.PrivateRR)
if ln := custrr.Data.Len() + len(custrr.Header().Name) + 11; ln != off {
t.Errorf("offset is not matching to length of Private RR: %d!=%d", off, ln)
}
rr1, off1, err := dns.UnpackRR(buf[:off], 0)
if err != nil {
t.Errorf("got error unpacking ISBN: %v", err)
return
}
if off1 != off {
t.Errorf("offset after unpacking differs: %d != %d", off1, off)
}
if rr1.String() != testrecord {
t.Errorf("record string representation did not match original %#v != %#v", rr1.String(), testrecord)
}
}
const TypeVERSION uint16 = 0xFF01
type VERSION struct {
x string
}
func NewVersion() dns.PrivateRdata { return &VERSION{""} }
func (rd *VERSION) String() string { return rd.x }
func (rd *VERSION) Parse(txt []string) error {
rd.x = strings.TrimSpace(strings.Join(txt, " "))
return nil
}
func (rd *VERSION) Pack(buf []byte) (int, error) {
b := []byte(rd.x)
n := copy(buf, b)
if n != len(b) {
return n, dns.ErrBuf
}
return n, nil
}
func (rd *VERSION) Unpack(buf []byte) (int, error) {
rd.x = string(buf)
return len(buf), nil
}
func (rd *VERSION) Copy(dest dns.PrivateRdata) error {
isbn, ok := dest.(*VERSION)
if !ok {
return dns.ErrRdata
}
isbn.x = rd.x
return nil
}
func (rd *VERSION) Len() int {
return len([]byte(rd.x))
}
var smallzone = `$ORIGIN example.org.
@ 3600 IN SOA sns.dns.icann.org. noc.dns.icann.org. (
2014091518 7200 3600 1209600 3600
)
A 1.2.3.4
ok ISBN 1231-92110-12
go VERSION (
1.3.1 ; comment
)
www ISBN 1231-92110-16
* CNAME @
`
func TestPrivateZoneParser(t *testing.T) {
dns.PrivateHandle("ISBN", TypeISBN, NewISBN)
dns.PrivateHandle("VERSION", TypeVERSION, NewVersion)
defer dns.PrivateHandleRemove(TypeISBN)
defer dns.PrivateHandleRemove(TypeVERSION)
r := strings.NewReader(smallzone)
z := dns.NewZoneParser(r, ".", "")
for _, ok := z.Next(); ok; _, ok = z.Next() {
}
if err := z.Err(); err != nil {
t.Fatal(err)
}
}