Add fakeip support

adapter/fakeip.go

@@ -0,0 +1,23 @@
+package adapter
+
+import (
+	"net/netip"
+
+	"github.com/sagernet/sing-dns"
+)
+
+type FakeIPStore interface {
+	Service
+	Contains(address netip.Addr) bool
+	Create(domain string, strategy dns.DomainStrategy) (netip.Addr, error)
+	Lookup(address netip.Addr) (string, bool)
+	Reset() error
+}
+
+type FakeIPStorage interface {
+	FakeIPMetadata() *FakeIPMetadata
+	FakeIPSaveMetadata(metadata *FakeIPMetadata) error
+	FakeIPStore(address netip.Addr, domain string) error
+	FakeIPLoad(address netip.Addr) (string, bool)
+	FakeIPReset() error
+}