diff --git a/inc/tsg_rule.h b/inc/tsg_rule.h
index 778c19c..b1c25a6 100644
--- a/inc/tsg_rule.h
+++ b/inc/tsg_rule.h
@@ -9,6 +9,14 @@ extern "C"
 {
 #endif
 
+#define	MAX_DOAMIN_LEN	2048
+
+struct _identify_info
+{
+	tsg_protocol_t proto;	//enum _tsg_protocol (tsg_types.h)
+	int domain_len;
+	char domain[MAX_DOAMIN_LEN];
+};
 
 typedef	enum _PULL_RESULT_TYPE
 {
@@ -30,13 +38,13 @@ int tsg_rule_init(const char *conffile);
 int tsg_scan_nesting_addr(Maat_feather_t maat_feather, const struct streaminfo *a_stream, tsg_protocol_t proto, scan_status_t *mid, Maat_rule_t*result, int result_num);
 
 //return 0 if failed, return >0 on success;
-int tsg_pull_policy_result(struct streaminfo *a_stream, PULL_RESULT_TYPE pull_result_type, Maat_rule_t *result, int result_num, enum tsg_protocol *protocol, char *domain, int *domain_len);
+int tsg_pull_policy_result(struct streaminfo *a_stream, PULL_RESULT_TYPE pull_result_type, Maat_rule_t *result, int result_num, struct _identify_info *identify_info);
 
 //return -1 if failed, return 0 on success;
 int tsg_shared_table_init(const char *conffile, Maat_feather_t maat_feather, void *logger);
 
 //return value: -1: failed, 0: not hit, >0: hit count 
-int tsg_scan_shared_policy(Maat_feather_t maat_feather, void *pkt, int pkt_len, Maat_rule_t *result, int result_num, char *domain, int *domain_len, scan_status_t *mid, void *logger, int thread_seq);
+int tsg_scan_shared_policy(Maat_feather_t maat_feather, void *pkt, int pkt_len, Maat_rule_t *result, int result_num, struct _identify_info *identify_info, scan_status_t *mid, void *logger, int thread_seq);
 
 #ifdef __cplusplus
 }