Implement route rules

adapter/router.go

@@ -4,19 +4,23 @@ import (
 	"context"
 	"net"
 
+	"github.com/oschwald/geoip2-golang"
 	N "github.com/sagernet/sing/common/network"
 )
 
 type Router interface {
+	Start() error
+	Close() error
+
 	DefaultOutbound() Outbound
 	Outbound(tag string) (Outbound, bool)
 	RouteConnection(ctx context.Context, conn net.Conn, metadata InboundContext) error
 	RoutePacketConnection(ctx context.Context, conn N.PacketConn, metadata InboundContext) error
-	Close() error
+	GeoIPReader() *geoip2.Reader
 }
 
 type Rule interface {
-	Match(metadata InboundContext) bool
+	Match(metadata *InboundContext) bool
 	Outbound() string
 	String() string
 }