Add tunnel

route/rule/rule_item_tunnel_source.go

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