package dns_test import ( "strings" "testing" "github.com/miekg/dns" ) const TypeISBN uint16 = 0x0F01 // 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) } else { t.Log(rr.String()) } } 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) } 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) } else { t.Log(rr1.String()) } } const TypeVERSION uint16 = 0x0F02 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. @ 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) for x := range dns.ParseZone(r, ".", "") { if err := x.Error; err != nil { t.Fatal(err) } t.Log(x.RR) } }