diff --git a/config.c b/config.c
index d3ccbed..7c4c6eb 100644
--- a/config.c
+++ b/config.c
@@ -65,10 +65,7 @@ RESULT parse_cmdline_conf_file(int argc, char* argv[]) {
                 PR_ERR("--conf-file必须有一个参数");
                 return FAILURE;
             } else {
-                int _len = strnlen(argv[i + 1], MAX_PATH);
-                g_prog_config.conffile = (char*)malloc(_len + 1);
-                strncpy(g_prog_config.conffile, argv[i + 1], _len);
-                g_prog_config.conffile[_len] = '\0';
+                g_prog_config.conffile = strndup(argv[i + 1], MAX_PATH);
             }
         }
     }
@@ -132,13 +129,13 @@ static void parse_one_opt(const char* option, const char* argument) {
     } else if (ISOPT("password")) {
         COPY_N_ARG_TO(g_eap_config.password, PASSWORD_MAX_LEN);
     } else if (ISOPT("nic")) {
-        COPY_N_ARG_TO(g_prog_config.ifname, IFNAMSIZ);
+        COPY_N_ARG_TO(g_prog_config.ifname, IFNAMSIZ - 1);
     } else if (ISOPT("daemonize")) {
         g_prog_config.daemon_type = atoi(argument) % 4;
     } else if (ISOPT("pkt-plugin") || ISOPT("module")) {
         insert_data(&g_prog_config.packet_plugin_list, (void*)argument);
     } else if (ISOPT("if-impl")) {
-        COPY_N_ARG_TO(g_prog_config.if_impl, IFNAMSIZ);
+        COPY_N_ARG_TO(g_prog_config.if_impl, IFNAMSIZ - 1);
     } else if (ISOPT("save")) {
         g_prog_config.save_now = 1;
     } else if (ISOPT("help")) {
@@ -160,7 +157,7 @@ static void parse_one_opt(const char* option, const char* argument) {
             g_prog_config.kill_type = KILL_AND_START; /* 结束其他实例，本实例继续运行 */
     } else if (ISOPT("proxy-lan-iface")) {
         g_proxy_config.proxy_on = 1;
-        COPY_N_ARG_TO(g_proxy_config.lan_ifname, IFNAMSIZ);
+        COPY_N_ARG_TO(g_proxy_config.lan_ifname, IFNAMSIZ - 1);
     } else if (ISOPT("auth-round")) {
         g_prog_config.auth_round = atoi(argument);
     } else if (ISOPT("pid-file")) {
diff --git a/packet_plugin/rjv3/packet_plugin_rjv3.c b/packet_plugin/rjv3/packet_plugin_rjv3.c
index c671c88..612c6f1 100644
--- a/packet_plugin/rjv3/packet_plugin_rjv3.c
+++ b/packet_plugin/rjv3/packet_plugin_rjv3.c
@@ -345,7 +345,7 @@ void rjv3_save_config(struct _packet_plugin* this) {
     conf_parser_add_value("max-dhcp-count", my_itoa(PRIV->max_dhcp_count, itoa_buf, 10));
 }
 
-static void packet_plugin_rjv3_print_banner() {
+static void packet_plugin_rjv3_print_banner(struct _packet_plugin* this) {
     PR_INFO("\nRJv3 for MiniEAP " VERSION "\n"
             "V3 校验算法来自 hyrathb@GitHub\n"
             "Hamster Tian, 2016\n\n");