fix: match custom service without epc

Author: lzf575

server/libs/grpc/grpc_service.go

@@ -200,7 +200,7 @@ func (s *ServiceTable) QueryCustomService(epcID int32, isIPv6 bool, ipv4 uint32,
 			return 0
 		}
 		serviceID := s.customServiceIpv6Table[genEpcIDIPv6Key(epcID, ipv6, 0, serverPort)]
-		if serviceID > 0 || serverPort == 0 {
+		if serviceID > 0 {
 			return serviceID
 		}
 		serviceID = s.customServiceIpv6Table[genEpcIDIPv6Key(epcID, ipv6, 0, 0)]
@@ -209,7 +209,7 @@ func (s *ServiceTable) QueryCustomService(epcID int32, isIPv6 bool, ipv4 uint32,
 		}
 		// thirdly query without epc
 		serviceID = s.customServiceIpv6Table[genEpcIDIPv6Key(0, ipv6, 0, serverPort)]
-		if serviceID > 0 || serverPort == 0 {
+		if serviceID > 0 {
 			return serviceID
 		}
 		// fourthly query without epc/port
@@ -219,7 +219,7 @@ func (s *ServiceTable) QueryCustomService(epcID int32, isIPv6 bool, ipv4 uint32,
 		return 0
 	}
 	serviceID := s.customServiceIpv4Table[genEpcIDIPv4Key(epcID, ipv4, serverPort)]
-	if serviceID > 0 || serverPort == 0 {
+	if serviceID > 0 {
 		return serviceID
 	}
 	serviceID = s.customServiceIpv4Table[genEpcIDIPv4Key(epcID, ipv4, 0)]
@@ -228,7 +228,7 @@ func (s *ServiceTable) QueryCustomService(epcID int32, isIPv6 bool, ipv4 uint32,
 	}
 	// thirdly query without epc
 	serviceID = s.customServiceIpv4Table[genEpcIDIPv4Key(0, ipv4, serverPort)]
-	if serviceID > 0 || serverPort == 0 {
+	if serviceID > 0 {
 		return serviceID
 	}
 	// fourthly query without epc/port