--- a/algo.h	Fri Mar 29 20:44:13 2013 +0800
+++ b/algo.h	Fri Mar 29 23:29:48 2013 +0800
@@ -83,10 +83,20 @@
 int have_algo(char* algo, size_t algolen, algo_type algos[]);
 void buf_put_algolist(buffer * buf, algo_type localalgos[]);
 
+enum kexguess2_used {
+	KEXGUESS2_LOOK,
+	KEXGUESS2_NO,
+	KEXGUESS2_YES,
+};
+
+#define KEXGUESS2_ALGO_NAME "[email protected]"
+#define KEXGUESS2_ALGO_ID 99
+
+
 algo_type * svr_buf_match_algo(buffer* buf, algo_type localalgos[],
-		int *goodguess);
+		enum kexguess2_used *kexguess2, int *goodguess);
 algo_type * cli_buf_match_algo(buffer* buf, algo_type localalgos[],
-		int *goodguess);
+		enum kexguess2_used *kexguess2, int *goodguess);
 
 #ifdef ENABLE_USER_ALGO_LIST
 int check_user_algos(const char* user_algo_list, algo_type * algos,