feat: add DOMAIN-REGEX rule

constant/rule.go

@@ -5,6 +5,7 @@ const (
 	Domain RuleType = iota
 	DomainSuffix
 	DomainKeyword
+	DomainRegex
 	GEOSITE
 	GEOIP
 	IPCIDR
@@ -40,6 +41,8 @@ func (rt RuleType) String() string {
 		return "DomainSuffix"
 	case DomainKeyword:
 		return "DomainKeyword"
+	case DomainRegex:
+		return "DomainRegex"
 	case GEOSITE:
 		return "GeoSite"
 	case GEOIP:

rules/common/domain_regex.go

@@ -0,0 +1,42 @@
+package common
+
+import (
+	"regexp"
+	"strings"
+
+	C "github.com/metacubex/mihomo/constant"
+)
+
+type DomainRegex struct {
+	*Base
+	regex   string
+	adapter string
+}
+
+func (dr *DomainRegex) RuleType() C.RuleType {
+	return C.DomainRegex
+}
+
+func (dr *DomainRegex) Match(metadata *C.Metadata) (bool, string) {
+	domain := metadata.RuleHost()
+	match, _ := regexp.MatchString(dr.regex, domain)
+	return match, dr.adapter
+}
+
+func (dr *DomainRegex) Adapter() string {
+	return dr.adapter
+}
+
+func (dr *DomainRegex) Payload() string {
+	return dr.regex
+}
+
+func NewDomainRegex(regex string, adapter string) *DomainRegex {
+	return &DomainRegex{
+		Base:    &Base{},
+		regex:   strings.ToLower(regex),
+		adapter: adapter,
+	}
+}
+
+//var _ C.Rule = (*DomainRegex)(nil)

rules/parser.go

@@ -17,6 +17,8 @@ func ParseRule(tp, payload, target string, params []string, subRules map[string]
 		parsed = RC.NewDomainSuffix(payload, target)
 	case "DOMAIN-KEYWORD":
 		parsed = RC.NewDomainKeyword(payload, target)
+	case "DOMAIN-REGEX":
+		parsed = RC.NewDomainRegex(payload, target)
 	case "GEOSITE":
 		parsed, parseErr = RC.NewGEOSITE(payload, target)
 	case "GEOIP":