feat: add whitelist support

bypass/bypass.go

@@ -235,11 +235,17 @@ func (bp *localBypass) Contains(ctx context.Context, network, addr string, opts
 	b := !bp.options.whitelist && matched ||
 		bp.options.whitelist && !matched
 	if b {
-		bp.options.logger.Debugf("bypass: %s", addr)
+		bp.options.logger.Debugf("bypass: %s, whitelist: %t", addr, bp.options.whitelist)
+	} else {
+		bp.options.logger.Debugf("pass: %s, whitelist: %t", addr, bp.options.whitelist)
 	}
 	return b
 }
 
+func (p *localBypass) IsWhitelist() bool {
+	return p.options.whitelist
+}
+
 func (bp *localBypass) parseLine(s string) string {
 	if n := strings.IndexByte(s, '#'); n >= 0 {
 		s = s[:n]

bypass/plugin/grpc.go

@@ -75,3 +75,7 @@ func (p *grpcPlugin) Close() error {
 	}
 	return nil
 }
+
+func (p *grpcPlugin) IsWhitelist() bool {
+	return false
+}

bypass/plugin/http.go

@@ -96,3 +96,7 @@ func (p *httpPlugin) Contains(ctx context.Context, network, addr string, opts ..
 	}
 	return res.OK
 }
+
+func (p *httpPlugin) IsWhitelist() bool {
+	return false
+}