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Added support for ENUM Source-URI Extension (#1301)

This commit is contained in:
Alexandru Ionut Tripon 2021-09-27 16:50:21 +03:00 committed by GitHub
parent 4e8fe099f4
commit 1630ffe2ca
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 55 additions and 0 deletions
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21
edns.go
View File

@ -14,6 +14,7 @@ const (
EDNS0LLQ = 0x1 // long lived queries: http://tools.ietf.org/html/draft-sekar-dns-llq-01
EDNS0UL = 0x2 // update lease draft: http://files.dns-sd.org/draft-sekar-dns-ul.txt
EDNS0NSID = 0x3 // nsid (See RFC 5001)
EDNS0ESU = 0x4 // ENUM Source-URI draft: https://datatracker.ietf.org/doc/html/draft-kaplan-enum-source-uri-00
EDNS0DAU = 0x5 // DNSSEC Algorithm Understood
EDNS0DHU = 0x6 // DS Hash Understood
EDNS0N3U = 0x7 // NSEC3 Hash Understood
@ -56,6 +57,8 @@ func makeDataOpt(code uint16) EDNS0 {
return new(EDNS0_PADDING)
case EDNS0EDE:
return new(EDNS0_EDE)
case EDNS0ESU:
return &EDNS0_ESU{Code: EDNS0ESU}
default:
e := new(EDNS0_LOCAL)
e.Code = code
@ -111,6 +114,8 @@ func (rr *OPT) String() string {
s += "\n; PADDING: " + o.String()
case *EDNS0_EDE:
s += "\n; EDE: " + o.String()
case *EDNS0_ESU:
s += "\n; ESU: " + o.String()
}
}
return s
@ -819,3 +824,19 @@ func (e *EDNS0_EDE) unpack(b []byte) error {
e.ExtraText = string(b[2:])
return nil
}
// The EDNS0_ESU option for ENUM Source-URI Extension
type EDNS0_ESU struct {
Code uint16
Uri string
}
// Option implements the EDNS0 interface.
func (e *EDNS0_ESU) Option() uint16 { return EDNS0ESU }
func (e *EDNS0_ESU) String() string { return e.Uri }
func (e *EDNS0_ESU) copy() EDNS0 { return &EDNS0_ESU{e.Code, e.Uri} }
func (e *EDNS0_ESU) pack() ([]byte, error) { return []byte(e.Uri), nil }
func (e *EDNS0_ESU) unpack(b []byte) error {
e.Uri = string(b)
return nil
}

34
edns_test.go
View File

@ -158,3 +158,37 @@ func TestZ(t *testing.T) {
t.Error("expected DO to be set")
}
}
func TestEDNS0_ESU(t *testing.T) {
p := []byte{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x29, 0x04,
0xC4, 0x00, 0x00, 0x00, 0x00, 0x00, 0x28, 0x00,
0x04, 0x00, 0x24, 0x73, 0x69, 0x70, 0x3A, 0x2B,
0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38,
0x39, 0x40, 0x74, 0x65, 0x73, 0x74, 0x2E, 0x63,
0x6F, 0x6D, 0x3B, 0x75, 0x73, 0x65, 0x72, 0x3D,
0x63, 0x67, 0x72, 0x61, 0x74, 0x65, 0x73,
}
m := new(Msg)
if err := m.Unpack(p); err != nil {
t.Fatalf("failed to unpack: %v", err)
}
opt := m.IsEdns0()
if opt == nil {
t.Fatalf("expected edns0 option")
}
if len(opt.Option) != 1 {
t.Fatalf("expected only one option: %v", opt.Option)
}
edns0 := opt.Option[0]
esu, ok := edns0.(*EDNS0_ESU)
if !ok {
t.Fatalf("expected option of type EDNS0_ESU, got %t", edns0)
}
expect := "sip:+123456789@test.com;user=cgrates"
if esu.Uri != expect {
t.Errorf("unpacked option is different; expected %v, got %v", expect, esu.Uri)
}
}