Fix linter configuration

.golangci.yml

@@ -3,18 +3,22 @@ linters:
   enable:
     - gofumpt
     - govet
-#    - gci
+    - gci
     - staticcheck
+    - paralleltest
+    - ineffassign
 
 issues:
   exclude-dirs:
     - internal
 
 linters-settings:
-#  gci:
-#    sections:
-#      - standard
-#      - prefix(github.com/sagernet/sing)
-#      - default
-  staticcheck:
-    go: '1.19'
+  gci:
+    custom-order: true
+    sections:
+      - standard
+      - prefix(github.com/sagernet/)
+      - default
+
+run:
+  go: "1.23"

tun_linux.go

@@ -712,7 +712,7 @@ func (t *NativeTun) rules() []*netlink.Rule {
 			it.Family = unix.AF_INET
 			rules = append(rules, it)
 		}
-		priority++
+		// priority++
 	}
 	if p6 {
 		it = netlink.NewRule()
@@ -755,7 +755,7 @@ func (t *NativeTun) rules() []*netlink.Rule {
 		it.Table = t.options.IPRoute2TableIndex
 		it.Family = unix.AF_INET6
 		rules = append(rules, it)
-		priority6++
+		// priority6++
 	}
 	if p4 {
 		it = netlink.NewRule()