-char const *lcp_type(int type);
-char const *avp_name(int avp);
-char const *stopccn_result_code(int code);
-char const *cdn_result_code(int code);
-char const *error_code(int code);
-char const *auth_type(int type);
-char const *ppp_lcp_type(int type);
+char const *l2tp_code(int type);
+char const *l2tp_avp_name(int avp);
+char const *l2tp_stopccn_result_code(int code);
+char const *l2tp_cdn_result_code(int code);
+char const *l2tp_error_code(int code);
+char const *ppp_phase(int code);
+char const *ppp_state(int code);
+char const *ppp_auth_type(int type);
+char const *ppp_code(int type);
+char const *ppp_lcp_option(int type);