Update EDNS0_UL to draft-sekar-dns-ul-02 (#1028)
This commit is contained in:
parent
40eab7a196
commit
4334efe802
26
edns.go
26
edns.go
|
@ -360,7 +360,7 @@ func (e *EDNS0_COOKIE) copy() EDNS0 { return &EDNS0_COOKIE{e.Code, e.C
|
|||
// The EDNS0_UL (Update Lease) (draft RFC) option is used to tell the server to set
|
||||
// an expiration on an update RR. This is helpful for clients that cannot clean
|
||||
// up after themselves. This is a draft RFC and more information can be found at
|
||||
// http://files.dns-sd.org/draft-sekar-dns-ul.txt
|
||||
// https://tools.ietf.org/html/draft-sekar-dns-ul-02
|
||||
//
|
||||
// o := new(dns.OPT)
|
||||
// o.Hdr.Name = "."
|
||||
|
@ -370,24 +370,36 @@ func (e *EDNS0_COOKIE) copy() EDNS0 { return &EDNS0_COOKIE{e.Code, e.C
|
|||
// e.Lease = 120 // in seconds
|
||||
// o.Option = append(o.Option, e)
|
||||
type EDNS0_UL struct {
|
||||
Code uint16 // Always EDNS0UL
|
||||
Lease uint32
|
||||
Code uint16 // Always EDNS0UL
|
||||
Lease uint32
|
||||
KeyLease uint32
|
||||
}
|
||||
|
||||
// Option implements the EDNS0 interface.
|
||||
func (e *EDNS0_UL) Option() uint16 { return EDNS0UL }
|
||||
func (e *EDNS0_UL) String() string { return strconv.FormatUint(uint64(e.Lease), 10) }
|
||||
func (e *EDNS0_UL) copy() EDNS0 { return &EDNS0_UL{e.Code, e.Lease} }
|
||||
func (e *EDNS0_UL) String() string { return fmt.Sprintf("%d %d", e.Lease, e.KeyLease) }
|
||||
func (e *EDNS0_UL) copy() EDNS0 { return &EDNS0_UL{e.Code, e.Lease, e.KeyLease} }
|
||||
|
||||
// Copied: http://golang.org/src/pkg/net/dnsmsg.go
|
||||
func (e *EDNS0_UL) pack() ([]byte, error) {
|
||||
b := make([]byte, 4)
|
||||
var b []byte
|
||||
if e.KeyLease == 0 {
|
||||
b = make([]byte, 4)
|
||||
} else {
|
||||
b = make([]byte, 8)
|
||||
binary.BigEndian.PutUint32(b[4:], e.KeyLease)
|
||||
}
|
||||
binary.BigEndian.PutUint32(b, e.Lease)
|
||||
return b, nil
|
||||
}
|
||||
|
||||
func (e *EDNS0_UL) unpack(b []byte) error {
|
||||
if len(b) < 4 {
|
||||
switch len(b) {
|
||||
case 4:
|
||||
e.KeyLease = 0
|
||||
case 8:
|
||||
e.KeyLease = binary.BigEndian.Uint32(b[4:])
|
||||
default:
|
||||
return ErrBuf
|
||||
}
|
||||
e.Lease = binary.BigEndian.Uint32(b)
|
||||
|
|
24
edns_test.go
24
edns_test.go
|
@ -109,3 +109,27 @@ func TestEDNS0_SUBNETUnpack(t *testing.T) {
|
|||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestEDNS0_UL(t *testing.T) {
|
||||
cases := []struct {
|
||||
l uint32
|
||||
kl uint32
|
||||
}{
|
||||
{0x01234567, 0},
|
||||
{0x76543210, 0xFEDCBA98},
|
||||
}
|
||||
for _, c := range cases {
|
||||
expect := EDNS0_UL{EDNS0UL, c.l, c.kl}
|
||||
b, err := expect.pack()
|
||||
if err != nil {
|
||||
t.Fatalf("failed to pack: %v", err)
|
||||
}
|
||||
actual := EDNS0_UL{EDNS0UL, ^uint32(0), ^uint32(0)}
|
||||
if err := actual.unpack(b); err != nil {
|
||||
t.Fatalf("failed to unpack: %v", err)
|
||||
}
|
||||
if expect != actual {
|
||||
t.Errorf("unpacked option is different; expected %v, got %v", expect, actual)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue