Add tunnel

route/rule/rule_item_tunnel_destination.go

@@ -0,0 +1,35 @@
+package rule
+
+import (
+	"strings"
+
+	"github.com/sagernet/sing-box/adapter"
+	F "github.com/sagernet/sing/common/format"
+)
+
+var _ RuleItem = (*TunnelDestinationItem)(nil)
+
+type TunnelDestinationItem struct {
+	destinations   []string
+	destinationMap map[string]bool
+}
+
+func NewTunnelDestinationItem(destinations []string) *TunnelDestinationItem {
+	rule := &TunnelDestinationItem{destinations, make(map[string]bool)}
+	for _, destination := range destinations {
+		rule.destinationMap[destination] = true
+	}
+	return rule
+}
+
+func (r *TunnelDestinationItem) Match(metadata *adapter.InboundContext) bool {
+	return r.destinationMap[metadata.TunnelDestination]
+}
+
+func (r *TunnelDestinationItem) String() string {
+	if len(r.destinations) == 1 {
+		return F.ToString("tunnel_destination=", r.destinations[0])
+	} else {
+		return F.ToString("tunnel_destination=[", strings.Join(r.destinations, " "), "]")
+	}
+}