feat: support DOMAIN-WILDCARD rule (#2124)

only support asterisk(*) and question mark(?)

rules/common/domain_wildcard.go

@@ -0,0 +1,41 @@
+package common
+
+import (
+	"strings"
+
+	"github.com/metacubex/mihomo/component/wildcard"
+	C "github.com/metacubex/mihomo/constant"
+)
+
+type DomainWildcard struct {
+	*Base
+	pattern string
+	adapter string
+}
+
+func (dw *DomainWildcard) RuleType() C.RuleType {
+	return C.DomainWildcard
+}
+
+func (dw *DomainWildcard) Match(metadata *C.Metadata, _ C.RuleMatchHelper) (bool, string) {
+	return wildcard.Match(dw.pattern, metadata.Host), dw.adapter
+}
+
+func (dw *DomainWildcard) Adapter() string {
+	return dw.adapter
+}
+
+func (dw *DomainWildcard) Payload() string {
+	return dw.pattern
+}
+
+var _ C.Rule = (*DomainWildcard)(nil)
+
+func NewDomainWildcard(pattern string, adapter string) (*DomainWildcard, error) {
+	pattern = strings.ToLower(pattern)
+	return &DomainWildcard{
+		Base:    &Base{},
+		pattern: pattern,
+		adapter: adapter,
+	}, nil
+}

rules/parser.go

@@ -19,6 +19,8 @@ func ParseRule(tp, payload, target string, params []string, subRules map[string]
 		parsed = RC.NewDomainKeyword(payload, target)
 	case "DOMAIN-REGEX":
 		parsed, parseErr = RC.NewDomainRegex(payload, target)
+	case "DOMAIN-WILDCARD":
+		parsed, parseErr = RC.NewDomainWildcard(payload, target)
 	case "GEOSITE":
 		parsed, parseErr = RC.NewGEOSITE(payload, target)
 	case "GEOIP":