Add package_name_regex route, DNS and headless rule item

route/rule/rule_default.go

@@ -209,6 +209,14 @@ func NewDefaultRule(ctx context.Context, logger log.ContextLogger, options optio
 		rule.items = append(rule.items, item)
 		rule.allItems = append(rule.allItems, item)
 	}
+	if len(options.PackageNameRegex) > 0 {
+		item, err := NewPackageNameRegexItem(options.PackageNameRegex)
+		if err != nil {
+			return nil, E.Cause(err, "package_name_regex")
+		}
+		rule.items = append(rule.items, item)
+		rule.allItems = append(rule.allItems, item)
+	}
 	if len(options.User) > 0 {
 		item := NewUserItem(options.User)
 		rule.items = append(rule.items, item)

route/rule/rule_dns.go

@@ -251,6 +251,14 @@ func NewDefaultDNSRule(ctx context.Context, logger log.ContextLogger, options op
 		rule.items = append(rule.items, item)
 		rule.allItems = append(rule.allItems, item)
 	}
+	if len(options.PackageNameRegex) > 0 {
+		item, err := NewPackageNameRegexItem(options.PackageNameRegex)
+		if err != nil {
+			return nil, E.Cause(err, "package_name_regex")
+		}
+		rule.items = append(rule.items, item)
+		rule.allItems = append(rule.allItems, item)
+	}
 	if len(options.User) > 0 {
 		item := NewUserItem(options.User)
 		rule.items = append(rule.items, item)

route/rule/rule_headless.go

@@ -153,6 +153,14 @@ func NewDefaultHeadlessRule(ctx context.Context, options option.DefaultHeadlessR
 		rule.items = append(rule.items, item)
 		rule.allItems = append(rule.allItems, item)
 	}
+	if len(options.PackageNameRegex) > 0 {
+		item, err := NewPackageNameRegexItem(options.PackageNameRegex)
+		if err != nil {
+			return nil, E.Cause(err, "package_name_regex")
+		}
+		rule.items = append(rule.items, item)
+		rule.allItems = append(rule.allItems, item)
+	}
 	if networkManager != nil {
 		if len(options.NetworkType) > 0 {
 			item := NewNetworkTypeItem(networkManager, common.Map(options.NetworkType, option.InterfaceType.Build))

route/rule/rule_item_package_name_regex.go

@@ -0,0 +1,56 @@
+package rule
+
+import (
+	"regexp"
+	"strings"
+
+	"github.com/sagernet/sing-box/adapter"
+	E "github.com/sagernet/sing/common/exceptions"
+	F "github.com/sagernet/sing/common/format"
+)
+
+var _ RuleItem = (*PackageNameRegexItem)(nil)
+
+type PackageNameRegexItem struct {
+	matchers    []*regexp.Regexp
+	description string
+}
+
+func NewPackageNameRegexItem(expressions []string) (*PackageNameRegexItem, error) {
+	matchers := make([]*regexp.Regexp, 0, len(expressions))
+	for i, regex := range expressions {
+		matcher, err := regexp.Compile(regex)
+		if err != nil {
+			return nil, E.Cause(err, "parse expression ", i)
+		}
+		matchers = append(matchers, matcher)
+	}
+	description := "package_name_regex="
+	eLen := len(expressions)
+	if eLen == 1 {
+		description += expressions[0]
+	} else if eLen > 3 {
+		description += F.ToString("[", strings.Join(expressions[:3], " "), "]")
+	} else {
+		description += F.ToString("[", strings.Join(expressions, " "), "]")
+	}
+	return &PackageNameRegexItem{matchers, description}, nil
+}
+
+func (r *PackageNameRegexItem) Match(metadata *adapter.InboundContext) bool {
+	if metadata.ProcessInfo == nil || len(metadata.ProcessInfo.AndroidPackageNames) == 0 {
+		return false
+	}
+	for _, matcher := range r.matchers {
+		for _, packageName := range metadata.ProcessInfo.AndroidPackageNames {
+			if matcher.MatchString(packageName) {
+				return true
+			}
+		}
+	}
+	return false
+}
+
+func (r *PackageNameRegexItem) String() string {
+	return r.description
+}

route/rule/rule_set.go

@@ -60,7 +60,7 @@ func HasHeadlessRule(rules []option.HeadlessRule, cond func(rule option.DefaultH
 }
 
 func isProcessHeadlessRule(rule option.DefaultHeadlessRule) bool {
-	return len(rule.ProcessName) > 0 || len(rule.ProcessPath) > 0 || len(rule.ProcessPathRegex) > 0 || len(rule.PackageName) > 0
+	return len(rule.ProcessName) > 0 || len(rule.ProcessPath) > 0 || len(rule.ProcessPathRegex) > 0 || len(rule.PackageName) > 0 || len(rule.PackageNameRegex) > 0
 }
 
 func isWIFIHeadlessRule(rule option.DefaultHeadlessRule) bool {