Add back UoT support

test/shadowsocks_test.go

@@ -8,6 +8,7 @@ import (
 
 	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing-box/option"
+	"github.com/sagernet/sing-shadowsocks/shadowaead_2022"
 	F "github.com/sagernet/sing/common/format"
 
 	"github.com/stretchr/testify/require"
@@ -193,6 +194,68 @@ func testShadowsocksSelf(t *testing.T, method string, password string) {
 	testSuit(t, clientPort, testPort)
 }
 
+func TestShadowsocksUoT(t *testing.T) {
+	method := shadowaead_2022.List[0]
+	password := mkBase64(t, 16)
+	startInstance(t, option.Options{
+		Log: &option.LogOptions{
+			Level: "trace",
+		},
+		Inbounds: []option.Inbound{
+			{
+				Type: C.TypeMixed,
+				Tag:  "mixed-in",
+				MixedOptions: option.HTTPMixedInboundOptions{
+					ListenOptions: option.ListenOptions{
+						Listen:     option.ListenAddress(netip.IPv4Unspecified()),
+						ListenPort: clientPort,
+					},
+				},
+			},
+			{
+				Type: C.TypeShadowsocks,
+				ShadowsocksOptions: option.ShadowsocksInboundOptions{
+					ListenOptions: option.ListenOptions{
+						Listen:     option.ListenAddress(netip.IPv4Unspecified()),
+						ListenPort: serverPort,
+					},
+					Method:   method,
+					Password: password,
+				},
+			},
+		},
+		Outbounds: []option.Outbound{
+			{
+				Type: C.TypeDirect,
+			},
+			{
+				Type: C.TypeShadowsocks,
+				Tag:  "ss-out",
+				ShadowsocksOptions: option.ShadowsocksOutboundOptions{
+					ServerOptions: option.ServerOptions{
+						Server:     "127.0.0.1",
+						ServerPort: serverPort,
+					},
+					Method:   method,
+					Password: password,
+					UoT:      true,
+				},
+			},
+		},
+		Route: &option.RouteOptions{
+			Rules: []option.Rule{
+				{
+					DefaultOptions: option.DefaultRule{
+						Inbound:  []string{"mixed-in"},
+						Outbound: "ss-out",
+					},
+				},
+			},
+		},
+	})
+	testSuit(t, clientPort, testPort)
+}
+
 func mkBase64(t *testing.T, length int) string {
 	psk := make([]byte, length)
 	_, err := rand.Read(psk)