diff --git a/config.c b/config.c
index 06aac8c..05be7fc 100644
--- a/config.c
+++ b/config.c
@@ -26,11 +26,11 @@ static void configure_daemon_log_param(int daemon_mode) {
             g_prog_config.run_in_background = 0;
             set_log_destination(LOG_TO_CONSOLE);
             break;
-        case 1:
         case 2:
             g_prog_config.run_in_background = 1;
             set_log_destination(LOG_TO_CONSOLE);
             break;
+        case 1:
         case 3:
             g_prog_config.run_in_background = 1;
             set_log_file_path(g_prog_config.logfile);
@@ -78,6 +78,41 @@ RESULT parse_cmdline_conf_file(int argc, char* argv[]) {
     return SUCCESS;
 }
 
+#define _STR(x) #x
+#define STR(x) _STR(x)
+static void print_cmdline_help() {
+    PR_RAW(
+        "\t--help, -h\t显示本帮助\n"
+        "\t--kill, -k [1]\t终止其他实例并退出。加任意非 0 参数表示终止其他实例后继续进行认证\n"
+        "\t--save, -w\t保存本次认证所用参数\n"
+        "\t--username, -u <...>\t用户名\n"
+        "\t--password, -p <...>\t密码\n"
+        "\t--nic, -n <...>\t\t要使用的网络界面名\n"
+        "\t--stage-timeout, -t <num>\t单个认证阶段的超时时间 [默认" STR(DEFAULT_STAGE_TIMEOUT) "]\n"
+        "\t--wait-after-fail, -r <num>\t认证失败后重新认证前的等待时间（注意当服务器要求重新认证时将直接开始认证）[默认" STR(DEFAULT_WAIT_AFTER_FAIL_SECS) "]\n"
+        "\t--max-fail, -l <num>\t最大允许认证失败次数 [默认" STR(DEFAULT_MAX_FAILURES) "]\n"
+        "\t--no-auto-reauth, -x\t认证掉线后不允许自动重连 [默认" STR(DEFAULT_RESTART_ON_LOGOFF) "]\n"
+        "\t--daemonize, -b <0-3>\t后台运行方式： [默认0]\n"
+            "\t\t\t\t0 = 不后台\n"
+            "\t\t\t\t1 = 后台运行，输出到当前控制台\n"
+            "\t\t\t\t2 = 同3，为保持兼容性而设\n"
+            "\t\t\t\t3 = 后台运行，输出到日志文件\n"
+        "\t--run-on-success, -c <...>\t认证完成后运行此命令 [默认无]\n"
+        "\t--dhcp-script <...>\t\t同上\n"
+        "\t--proxy-lan-iface, -z <...>\t代理认证时的 LAN 网络界面名 [默认无]\n"
+        "\t--auth-round, -j <num>\t需要认证的次数 [默认1]\n"
+        "\t--max-retries <num>\t最大超时重试的次数 [默认3]\n"
+        "\t--pid-file <...>\tPID 文件路径，设为none可禁用 [默认" DEFAULT_PIDFILE "]\n"
+        "\t--conf-file <...>\t配置文件路径 [默认" DEFAULT_CONFFILE "]\n"
+        "\t--if-impl <...>\t\t选择此网络操作抽象模块 [默认" DEFAULT_IF_IMPL "]\n"
+        "\t--pkt-plugin <...>\t启用此名称的数据包修改器 [默认无]\n"
+        "\t--module <...>\t\t同上\n"
+    );
+    
+    packet_plugin_print_cmdline_help();
+    exit(EXIT_SUCCESS);
+}
+
 RESULT parse_cmdline_opts(int argc, char* argv[]) {
     int opt = 0;
     int longIndex = 0;
@@ -91,16 +126,15 @@ RESULT parse_cmdline_opts(int argc, char* argv[]) {
 	    { "username", required_argument, NULL, 'u' },
 	    { "password", required_argument, NULL, 'p' },
 	    { "nic", required_argument, NULL, 'n' },
-	    { "auth-timeout", required_argument, NULL, 't' },
+	    { "stage-timeout", required_argument, NULL, 't' },
 	    { "wait-after-fail", required_argument, NULL, 'r' },
 	    { "max-fail", required_argument, NULL, 'l' },
-	    { "no-auto-reauth", required_argument, NULL, 'x' },
+	    { "no-auto-reauth", no_argument, NULL, 'x' },
 	    { "daemonize", required_argument, NULL, 'b' },
 	    { "run-on-success", required_argument, NULL, 'c' }, /* They are */
 	    { "dhcp-script", required_argument, NULL, 'c' },    /* both 'c' */
 	    { "proxy-lan-iface", required_argument, NULL, 'z' },
 	    { "auth-round", required_argument, NULL, 'j' },
-	    { "decode-config", required_argument, NULL, 'q' },
 	    { "max-retries", required_argument, NULL, 0},
 	    { "pid-file", required_argument, NULL, 0},
 	    { "if-impl", required_argument, NULL, 0},
@@ -117,7 +151,8 @@ RESULT parse_cmdline_opts(int argc, char* argv[]) {
     while (opt != -1) {
         switch (opt) {
             case 'h':
-                //print_help(argv[0]); /* 调用本函数将退出程序 */
+                print_cmdline_help(); /* 调用本函数将退出程序 */
+                break;
             case 'k':
                 if (optarg == NULL)
                     g_prog_config.kill_type = KILL_ONLY; /* 结束其他实例并退出 */
@@ -137,7 +172,7 @@ RESULT parse_cmdline_opts(int argc, char* argv[]) {
                 COPY_N_ARG_TO(g_prog_config.ifname, IFNAMSIZ);
                 break;
             case 't':
-                g_prog_config.stage_timeout = atoi(optarg); /* 此处不设置限制，但原始的代码中有最大99秒的限制 */
+                g_prog_config.stage_timeout = atoi(optarg); /* 此处不设置限制，但原始的代码中有最大99秒的限制 */ //TODO
                 break;
             case 'r':
                 g_prog_config.wait_after_fail_secs = atoi(optarg); /* 同上 */
@@ -146,7 +181,7 @@ RESULT parse_cmdline_opts(int argc, char* argv[]) {
                 g_prog_config.max_failures = atoi(optarg);
                 break;
             case 'x':
-                g_prog_config.restart_on_logoff = atoi(optarg);
+                g_prog_config.restart_on_logoff = 1;
                 break;
             case 'b':
                 daemon_mode = atoi(optarg) % 4;
diff --git a/eap_state_machine.c b/eap_state_machine.c
index 52b2d11..18f1dbf 100644
--- a/eap_state_machine.c
+++ b/eap_state_machine.c
@@ -213,6 +213,7 @@ static RESULT state_mach_process_failure(ETH_EAP_FRAME* frame) {
 }
 
 void eap_state_machine_recv_handler(ETH_EAP_FRAME* frame) {
+    /* Keep a copy of the frame, since if_impl may not hold it */
     if (PRIV->last_recv_frame != NULL) {
         free_frame(&PRIV->last_recv_frame);
     }
@@ -246,7 +247,7 @@ void eap_state_machine_recv_handler(ETH_EAP_FRAME* frame) {
                 break;
         }
     }
-    packet_plugin_on_frame_received(frame);
+    packet_plugin_on_frame_received(PRIV->last_recv_frame);
 }
 
 static void state_watchdog(void* frame) {
@@ -255,6 +256,7 @@ static void state_watchdog(void* frame) {
 }
 
 static RESULT trans_to_preparing(ETH_EAP_FRAME* frame) {
+    PR_INFO("MiniEAP " VERSION "已启动");
     IF_IMPL* _if_impl = get_if_impl();
     RESULT ret = switch_to_state(EAP_STATE_START_SENT, frame);
     _if_impl->start_capture(_if_impl); // Blocking...
diff --git a/include/config.h b/include/config.h
index ea8df58..11063f9 100644
--- a/include/config.h
+++ b/include/config.h
@@ -97,7 +97,7 @@ typedef struct _prog_config {
      * and timed access control.
      */
     int restart_on_logoff;
-    #define DEFAULT_RESTART_ON_LOGOFF FALSE
+    #define DEFAULT_RESTART_ON_LOGOFF TRUE
 
     /*
      * Wait seconds after failure before next try.
diff --git a/include/logging.h b/include/logging.h
index 7fbe69c..195398f 100644
--- a/include/logging.h
+++ b/include/logging.h
@@ -33,6 +33,9 @@
 #define PR_DBG(...) \
     print_log("D", FUNC_NAME, __VA_ARGS__);
 
+#define PR_RAW(...) \
+    print_log_raw(__VA_ARGS__)
+
 typedef enum _LOG_DESTINATION {
 	LOG_TO_FILE,
 	LOG_TO_CONSOLE
diff --git a/include/minieap_common.h b/include/minieap_common.h
index 20dd64d..a9418d2 100644
--- a/include/minieap_common.h
+++ b/include/minieap_common.h
@@ -1,6 +1,8 @@
 #ifndef _MINIEAP_MINIEAP_COMMON_H
 #define _MINIEAP_MINIEAP_COMMON_H
 
+#define VERSION "0.91"
+
 typedef enum _function_result {
     SUCCESS = 0,
     FAILURE = -1
diff --git a/include/packet_plugin.h b/include/packet_plugin.h
index b4d5d3e..4d78cfb 100644
--- a/include/packet_plugin.h
+++ b/include/packet_plugin.h
@@ -10,7 +10,7 @@ typedef struct _packet_plugin {
      * Can be used to free memory.
      */
     void (*destroy)(struct _packet_plugin* this);
-    
+
     /*
      * Called by main program when command line options are available.
      * Can be used to initialize custom options.
@@ -18,7 +18,7 @@ typedef struct _packet_plugin {
      * Return: if there is any error during the process (malformed value, etc)
      */
     RESULT (*process_cmdline_opts)(struct _packet_plugin* this, int argc, char* argv[]);
-    
+
     /*
      * Called by main program when it knows the config file path.
      * Can be used to read from config file.
@@ -30,26 +30,31 @@ typedef struct _packet_plugin {
      * Return: if there is any error during the process (malformed value, etc)
      */
     RESULT (*process_config_file)(struct _packet_plugin* this, const char* filepath);
-    
+
     /*
      * Validate the parameters (from config file or overriden by cmdline)
      *
      * Return: if all mandatory params are valid/not null
      */
     RESULT (*validate_params)(struct _packet_plugin* this);
-    
+
+    /*
+     * Print credit / version info
+     */
+    void  (*print_banner)(struct _packet_plugin* this);
+
     /*
      * Load the defaults
      *
      * Return: if all mandatory params are valid/not null
      */
     void (*load_default_params)(struct _packet_plugin* this);
-    
+
     /*
      * Called by main program when printing help for command line options.
      */
     void (*print_cmdline_help)(struct _packet_plugin* this);
-    
+
     /*
      * Called by main program when the main program finishes filling
      * the standard ethernet and EAP(OL) fields in a ready-to-send frame.
@@ -66,24 +71,29 @@ typedef struct _packet_plugin {
      * Return: if the frame is processed successfully
      */
     RESULT (*on_frame_received)(struct _packet_plugin* this, ETH_EAP_FRAME* frame);
-    
+
     /*
      * Sets the round number we are currently in.
      * This is useful in double authentication, where frames in round 1 and round 2
      * require different fields.
      */
     void (*set_auth_round)(struct _packet_plugin* this, int round);
-    
+
     /*
      * Plugin name, to be selected by user
      */
     char* name;
-    
+
     /*
      * Description, displayed to user
      */
     char* description;
-    
+
+    /*
+     * Version string, displayed to user
+     */
+    char* version;
+
     /*
      * Packet plugin internal use
      */
@@ -100,6 +110,7 @@ RESULT select_packet_plugin(const char* name);
 void packet_plugin_destroy();
 RESULT packet_plugin_process_cmdline_opts(int argc, char* argv[]);
 RESULT packet_plugin_validate_params();
+void packet_plugin_print_banner();
 void packet_plugin_load_default_params();
 RESULT packet_plugin_process_config_file(char* filepath);
 void packet_plugin_print_cmdline_help();
diff --git a/minieap.c b/minieap.c
index 2b17c42..62c6bcc 100644
--- a/minieap.c
+++ b/minieap.c
@@ -81,6 +81,9 @@ static int init_cfg(int argc, char* argv[]) {
     init_if_impl_list();
     init_packet_plugin_list();
 
+    PR_RAW("MiniEAP " VERSION "\n"
+           "Hamster Tian, 2016\n\n");
+
     load_default_params();
     if (IS_FAIL(init_program_config(argc, argv))) {
         PR_ERR("参数初始化错误");
@@ -94,6 +97,7 @@ static int init_cfg(int argc, char* argv[]) {
         return FAILURE;
     }
 
+    packet_plugin_print_banner();
     packet_plugin_load_default_params();
     if (IS_FAIL(init_plugin_config(argc, argv))) {
         PR_ERR("插件初始化错误");
diff --git a/packet_plugin/packet_plugin.c b/packet_plugin/packet_plugin.c
index cb610bb..5393de7 100644
--- a/packet_plugin/packet_plugin.c
+++ b/packet_plugin/packet_plugin.c
@@ -26,7 +26,8 @@ int init_packet_plugin_list() {
     int i = 0;
     for (; i < sizeof(list) / sizeof(PACKET_PLUGIN*); ++i) {
         PACKET_PLUGIN* (*func)() = list[i];
-        insert_data(&g_packet_plugin_list, func());
+        PACKET_PLUGIN* instance = func();
+        insert_data(&g_packet_plugin_list, instance);
     }
     return i;
 }
@@ -150,3 +151,12 @@ void packet_plugin_set_auth_round(int round) {
         PLUGIN->set_auth_round(PLUGIN, round);
     } while ((plugin_info = plugin_info->next));
 }
+
+void packet_plugin_print_banner() {
+    LIST_ELEMENT *plugin_info = g_active_packet_plugin_list;
+    if (g_active_packet_plugin_list == NULL) return;
+    do {
+        CHK_FUNC(PLUGIN->print_banner);
+        PLUGIN->print_banner(PLUGIN);
+    } while ((plugin_info = plugin_info->next));
+}
diff --git a/packet_plugin/rjv3/packet_plugin_rjv3.c b/packet_plugin/rjv3/packet_plugin_rjv3.c
index ce780cb..b2cf362 100644
--- a/packet_plugin/rjv3/packet_plugin_rjv3.c
+++ b/packet_plugin/rjv3/packet_plugin_rjv3.c
@@ -222,6 +222,12 @@ RESULT rjv3_process_config_file(struct _packet_plugin* this, const char* filepat
     return SUCCESS; // TODO
 }
 
+static void packet_plugin_rjv3_print_banner() {
+    PR_INFO("\nRJv3 for MiniEAP " VERSION "\n"
+            "V3 校验算法来自 hyrathb@GitHub\n"
+            "Hamster Tian, 2016\n\n");
+}
+
 PACKET_PLUGIN* packet_plugin_rjv3_new() {
     PACKET_PLUGIN* this = (PACKET_PLUGIN*)malloc(sizeof(PACKET_PLUGIN));
     if (this < 0) {
@@ -240,8 +246,10 @@ PACKET_PLUGIN* packet_plugin_rjv3_new() {
 
     this->name = "rjv3";
     this->description = "来自 hyrathb@GitHub 的 Ruijie V3 验证算法";
+    this->version = PACKET_PLUGIN_RJV3_VER_STR;
     this->destroy = rjv3_destroy;
     this->process_cmdline_opts = rjv3_process_cmdline_opts;
+    this->print_banner = packet_plugin_rjv3_print_banner;
     this->load_default_params = rjv3_load_default_params;
     this->print_cmdline_help = rjv3_print_cmdline_help;
     this->prepare_frame = rjv3_prepare_frame;
diff --git a/packet_plugin/rjv3/packet_plugin_rjv3.h b/packet_plugin/rjv3/packet_plugin_rjv3.h
index e1e1cfb..44f15ad 100644
--- a/packet_plugin/rjv3/packet_plugin_rjv3.h
+++ b/packet_plugin/rjv3/packet_plugin_rjv3.h
@@ -3,6 +3,8 @@
 
 #include "packet_plugin.h"
 
+#define PACKET_PLUGIN_RJV3_VER_STR  "0.90"
+
 #define DEFAULT_HEARTBEAT_INTERVAL  60
 #define DEFAULT_SERVICE_NAME        "internet"
 #define DEFAULT_VER_STR             "RG-SU For Linux V1.0"