Change outbound patch

config/outbound.go

@@ -0,0 +1,78 @@
+package config
+
+import (
+	"encoding/json"
+	"fmt"
+	"net"
+
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/option"
+)
+
+func patchOutbound(base option.Outbound, configOpt ConfigOptions) (*option.Outbound, string, error) {
+	var serverDomain string
+	var outbound option.Outbound
+
+	formatErr := func(err error) error {
+		return fmt.Errorf("error patching outbound[%s][%s]: %w", base.Tag, base.Type, err)
+	}
+
+	jsonData, err := base.MarshalJSON()
+	if err != nil {
+		return nil, "", formatErr(err)
+	}
+
+	var obj map[string]interface{}
+	err = json.Unmarshal(jsonData, &obj)
+	if err != nil {
+		return nil, "", formatErr(err)
+	}
+
+	if server, ok := obj["server"].(string); ok {
+		if server != "" && net.ParseIP(server) == nil {
+			serverDomain = fmt.Sprintf("full:%s", server)
+		}
+	}
+
+	if !(base.Type == C.TypeSelector || base.Type == C.TypeURLTest || base.Type == C.TypeBlock || base.Type == C.TypeDNS) {
+		if configOpt.EnableFragment {
+			tlsFragment := option.TLSFragmentOptions{
+				Enabled: configOpt.TLSTricks.EnableFragment,
+				Size:    configOpt.TLSTricks.FragmentSize,
+				Sleep:   configOpt.TLSTricks.FragmentSleep,
+			}
+			obj["tls_fragment"] = tlsFragment
+		} else {
+			obj["tls_fragment"] = nil
+		}
+
+		if tls, ok := obj["tls"].(map[string]interface{}); ok {
+			tlsTricks := option.TLSTricksOptions{
+				MixedCaseSNI: configOpt.TLSTricks.EnableMixedSNICase,
+			}
+
+			if configOpt.TLSTricks.EnablePadding {
+				tlsTricks.PaddingMode = "random"
+				tlsTricks.PaddingSize = configOpt.TLSTricks.PaddingSize
+			}
+
+			if tlsTricks.MixedCaseSNI || tlsTricks.PaddingMode != "" {
+				tls["tls_tricks"] = tlsTricks
+			} else {
+				tls["tls_tricks"] = nil
+			}
+		}
+	}
+
+	modifiedJson, err := json.Marshal(obj)
+	if err != nil {
+		return nil, "", formatErr(err)
+	}
+
+	err = outbound.UnmarshalJSON(modifiedJson)
+	if err != nil {
+		return nil, "", formatErr(err)
+	}
+
+	return &outbound, serverDomain, nil
+}