[Feature]

1.Add Network rule, match network type(TCP/UDP)
2.Add logic rules(NOT,OR,AND)
-AND,((DOMAIN,baidu.com),(NETWORK,UDP)),REJECT

(cherry picked from commit d7092e2e37f2c48282c878edea1b2ebc2912b09a)

rule/common/domain_keyword.go

@@ -0,0 +1,49 @@
+package common
+
+import (
+	"strings"
+
+	C "github.com/Dreamacro/clash/constant"
+)
+
+type DomainKeyword struct {
+	keyword   string
+	adapter   string
+	ruleExtra *C.RuleExtra
+}
+
+func (dk *DomainKeyword) RuleType() C.RuleType {
+	return C.DomainKeyword
+}
+
+func (dk *DomainKeyword) Match(metadata *C.Metadata) bool {
+	if metadata.AddrType != C.AtypDomainName {
+		return false
+	}
+	domain := metadata.Host
+	return strings.Contains(domain, dk.keyword)
+}
+
+func (dk *DomainKeyword) Adapter() string {
+	return dk.adapter
+}
+
+func (dk *DomainKeyword) Payload() string {
+	return dk.keyword
+}
+
+func (dk *DomainKeyword) ShouldResolveIP() bool {
+	return false
+}
+
+func (dk *DomainKeyword) RuleExtra() *C.RuleExtra {
+	return dk.ruleExtra
+}
+
+func NewDomainKeyword(keyword string, adapter string, ruleExtra *C.RuleExtra) *DomainKeyword {
+	return &DomainKeyword{
+		keyword:   strings.ToLower(keyword),
+		adapter:   adapter,
+		ruleExtra: ruleExtra,
+	}
+}