Expose DNS common helpers in lns

lns.go

@@ -20,12 +20,36 @@ import (
 	core "dappco.re/go/core"
 	"dappco.re/go/lns/internal/nameutil"
 	"dappco.re/go/lns/pkg/covenant"
+	dnspkg "dappco.re/go/lns/pkg/dns"
 	"dappco.re/go/lns/pkg/primitives"
 )
 
 // ServiceName is the registered name for the LNS service group.
 const ServiceName = "lns"
 
+// DNS common constants mirror pkg/dns so callers can stay in the top-level
+// lns package for the reference DNS metadata.
+const DEFAULT_TTL = dnspkg.DEFAULT_TTL
+
+// DUMMY mirrors the DNS zero-length reference buffer used by pkg/dns.
+var DUMMY = dnspkg.DUMMY
+
+// Type map bitmaps mirror pkg/dns common constants.
+var (
+	TYPE_MAP_ROOT  = dnspkg.TYPE_MAP_ROOT
+	TYPE_MAP_EMPTY = dnspkg.TYPE_MAP_EMPTY
+	TYPE_MAP_NS    = dnspkg.TYPE_MAP_NS
+	TYPE_MAP_TXT   = dnspkg.TYPE_MAP_TXT
+	TYPE_MAP_A     = dnspkg.TYPE_MAP_A
+	TYPE_MAP_AAAA  = dnspkg.TYPE_MAP_AAAA
+)
+
+// HSTypes mirrors the DNS hsTypes lookup table from pkg/dns.
+var HSTypes = dnspkg.HSTypes
+
+// HSTypesByVal mirrors the DNS hsTypesByVal reverse lookup table from pkg/dns.
+var HSTypesByVal = dnspkg.HSTypesByVal
+
 // Service is the LNS service that manages .lthn name resolution,
 // covenant processing, and name-chain state queries.
 //
@@ -134,6 +158,56 @@ func GetServiceName() string {
 	return ServiceName
 }
 
+// GetDefaultTTL returns the reference DNS TTL used for synthesized records.
+func GetDefaultTTL() int {
+	return DEFAULT_TTL
+}
+
+// GetDummy returns the zero-length DNS reference buffer.
+func GetDummy() []byte {
+	return DUMMY
+}
+
+// GetTypeMapRoot returns the reference type bitmap for the root zone.
+func GetTypeMapRoot() []byte {
+	return TYPE_MAP_ROOT
+}
+
+// GetTypeMapEmpty returns the reference type bitmap for an empty response.
+func GetTypeMapEmpty() []byte {
+	return TYPE_MAP_EMPTY
+}
+
+// GetTypeMapNS returns the reference type bitmap for NS responses.
+func GetTypeMapNS() []byte {
+	return TYPE_MAP_NS
+}
+
+// GetTypeMapTXT returns the reference type bitmap for TXT responses.
+func GetTypeMapTXT() []byte {
+	return TYPE_MAP_TXT
+}
+
+// GetTypeMapA returns the reference type bitmap for A responses.
+func GetTypeMapA() []byte {
+	return TYPE_MAP_A
+}
+
+// GetTypeMapAAAA returns the reference type bitmap for AAAA responses.
+func GetTypeMapAAAA() []byte {
+	return TYPE_MAP_AAAA
+}
+
+// GetHSTypes returns the DNS record-type lookup table.
+func GetHSTypes() map[string]dnspkg.HSType {
+	return HSTypes
+}
+
+// GetHSTypesByVal returns the reverse DNS record-type lookup table.
+func GetHSTypesByVal() map[dnspkg.HSType]string {
+	return HSTypesByVal
+}
+
 // OnStartup satisfies core.Startable so LNS participates in Core lifecycle
 // discovery without requiring any explicit setup.
 func (s *Service) OnStartup(context.Context) core.Result {

lns_package_test.go

@@ -3,6 +3,7 @@
 package lns
 
 import (
+	"bytes"
 	"crypto/sha3"
 	"encoding/binary"
 	"strings"
@@ -11,6 +12,7 @@ import (
 	"golang.org/x/crypto/blake2b"
 
 	"dappco.re/go/lns/pkg/covenant"
+	dnspkg "dappco.re/go/lns/pkg/dns"
 	"dappco.re/go/lns/pkg/primitives"
 )
 
@@ -575,6 +577,56 @@ func TestPackageConstantGetters(t *testing.T) {
 	}
 }
 
+func TestPackageDNSCommonGetters(t *testing.T) {
+	if GetDefaultTTL() != DEFAULT_TTL {
+		t.Fatalf("GetDefaultTTL() = %d, want %d", GetDefaultTTL(), DEFAULT_TTL)
+	}
+
+	if !bytes.Equal(GetDummy(), DUMMY) {
+		t.Fatal("GetDummy should alias DUMMY")
+	}
+
+	if !bytes.Equal(GetTypeMapRoot(), TYPE_MAP_ROOT) {
+		t.Fatal("GetTypeMapRoot should alias TYPE_MAP_ROOT")
+	}
+
+	if !bytes.Equal(GetTypeMapEmpty(), TYPE_MAP_EMPTY) {
+		t.Fatal("GetTypeMapEmpty should alias TYPE_MAP_EMPTY")
+	}
+
+	if !bytes.Equal(GetTypeMapNS(), TYPE_MAP_NS) {
+		t.Fatal("GetTypeMapNS should alias TYPE_MAP_NS")
+	}
+
+	if !bytes.Equal(GetTypeMapTXT(), TYPE_MAP_TXT) {
+		t.Fatal("GetTypeMapTXT should alias TYPE_MAP_TXT")
+	}
+
+	if !bytes.Equal(GetTypeMapA(), TYPE_MAP_A) {
+		t.Fatal("GetTypeMapA should alias TYPE_MAP_A")
+	}
+
+	if !bytes.Equal(GetTypeMapAAAA(), TYPE_MAP_AAAA) {
+		t.Fatal("GetTypeMapAAAA should alias TYPE_MAP_AAAA")
+	}
+
+	if len(GetHSTypes()) != len(HSTypes) {
+		t.Fatal("GetHSTypes should alias HSTypes")
+	}
+
+	if len(GetHSTypesByVal()) != len(HSTypesByVal) {
+		t.Fatal("GetHSTypesByVal should alias HSTypesByVal")
+	}
+
+	if got := GetHSTypes()["DS"]; got != dnspkg.HSTypeDS {
+		t.Fatalf("GetHSTypes()[\"DS\"] = %d, want %d", got, dnspkg.HSTypeDS)
+	}
+
+	if got := GetHSTypesByVal()[dnspkg.HSTypeTXT]; got != "TXT" {
+		t.Fatalf("GetHSTypesByVal()[TXT] = %q, want %q", got, "TXT")
+	}
+}
+
 func TestPackageNameStateAliases(t *testing.T) {
 	var state NameState
 	var delta NameDelta