Better error reporting when connection fails to come up

- Handle early errors (openvpn exits before management connection is up)
    with a helpful error message that points the user to view log.
- Include only readable config files in the connection list
- Warn if no connection profiles found

TODO: handle startup errors from interactive service

manage.c

@@ -54,7 +54,6 @@ InitManagement(const mgmt_rtmsg_handler *handler)
     }
 }
 
-
 /*
  * Connect to the OpenVPN management interface and register
  * asynchronous socket event notification for it
@@ -205,7 +204,11 @@ OnManagement(SOCKET sk, LPARAM lParam)
             if (time(NULL) < c->manage.timeout)
                 connect(c->manage.sk, (SOCKADDR *)&c->manage.skaddr, sizeof(c->manage.skaddr));
             else
+            {
+                /* Connection to MI timed out. */
+                c->state = timedout;
                 rtmsg_handler[stop](c, "");
+            }
         }
         break;
 

openvpn-gui-res.h

@@ -156,6 +156,8 @@
 #define IDS_ERR_CONN_SCRIPT_FAILED      1248
 #define IDS_ERR_RUN_CONN_SCRIPT_TIMEOUT 1249
 #define IDS_ERR_CONFIG_EXIST            1251
+#define IDS_NFO_CONN_TIMEOUT            1252
+#define IDS_NFO_NO_CONFIGS              1253
 
 /* Program Startup Related */
 #define IDS_ERR_OPEN_DEBUG_FILE         1301
@@ -225,6 +227,8 @@
 #define IDS_ERR_OPEN_SCMGR              1706
 #define IDS_ERR_STOP_SERVICE            1707
 #define IDS_NFO_RESTARTED               1708
+#define IDS_ERR_ACCESS_SERVICE_PIPE     1709
+#define IDS_ERR_WRITE_SERVICE_PIPE      1710
 
 /* Registry Related */
 #define IDS_ERR_GET_WINDOWS_DIR         1801

openvpn.c

@@ -341,6 +341,7 @@ void
 OnStop(connection_t *c, UNUSED char *msg)
 {
     UINT txt_id, msg_id;
+    TCHAR *msg_xtra;
     SetMenuStatus(c, disconnected);
 
     switch (c->state)
@@ -366,9 +367,13 @@ OnStop(connection_t *c, UNUSED char *msg)
     case resuming:
     case connecting:
     case reconnecting:
+    case timedout:
         /* We have failed to (re)connect */
         txt_id = c->state == reconnecting ? IDS_NFO_STATE_FAILED_RECONN : IDS_NFO_STATE_FAILED;
         msg_id = c->state == reconnecting ? IDS_NFO_RECONN_FAILED : IDS_NFO_CONN_FAILED;
+        msg_xtra = c->state == timedout ? c->log_path : c->config_name;
+        if (c->state == timedout)
+            msg_id = IDS_NFO_CONN_TIMEOUT;
 
         c->state = disconnecting;
         CheckAndSetTrayIcon();
@@ -382,7 +387,7 @@ OnStop(connection_t *c, UNUSED char *msg)
             SetForegroundWindow(c->hwndStatus);
             ShowWindow(c->hwndStatus, SW_SHOW);
         }
-        ShowLocalizedMsg(msg_id, c->config_name);
+        ShowLocalizedMsg(msg_id, msg_xtra);
         SendMessage(c->hwndStatus, WM_CLOSE, 0, 0);
         break;
 
@@ -703,7 +708,7 @@ StartOpenVPN(connection_t *c)
         DWORD dwMode = PIPE_READMODE_MESSAGE;
         if (!SetNamedPipeHandleState(service, &dwMode, NULL, NULL))
         {
-            // TODO: add error message
+            ShowLocalizedMsg (IDS_ERR_ACCESS_SERVICE_PIPE);
             CloseHandle(c->exit_event);
             goto out;
         }
@@ -715,7 +720,7 @@ StartOpenVPN(connection_t *c)
 
         if (!WriteFile(service, startup_info, size * sizeof (TCHAR), &written, NULL))
         {
-            // TODO: add error message
+            ShowLocalizedMsg (IDS_ERR_WRITE_SERVICE_PIPE);
             CloseHandle(c->exit_event);
             goto out;
         }

openvpn_config.c

@@ -61,6 +61,22 @@ match(const WIN32_FIND_DATA *find, const TCHAR *ext)
     return match_false;
 }
 
+static bool
+CheckReadAccess (const TCHAR *path)
+{
+    HANDLE h;
+    bool ret = FALSE;
+
+    h = CreateFile (path, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
+                   FILE_ATTRIBUTE_NORMAL, NULL);
+    if ( h != INVALID_HANDLE_VALUE )
+    {
+        ret = TRUE;
+        CloseHandle (h);
+    }
+
+    return ret;
+}
 
 static int
 ConfigAlreadyExists(TCHAR *newconfig)
@@ -111,6 +127,8 @@ BuildFileList()
     HANDLE find_handle;
     TCHAR find_string[MAX_PATH];
     TCHAR subdir_table[MAX_CONFIG_SUBDIRS][MAX_PATH];
+    TCHAR fullpath[MAX_PATH];
+    static int warn_no_configs = 1;
     int subdirs = 0;
     int i;
 
@@ -134,7 +152,9 @@ BuildFileList()
         match_t match_type = match(&find_obj, o.ext_string);
         if (match_type == match_file)
         {
-            AddConfigFileToList(o.num_configs++, find_obj.cFileName, o.config_dir);
+            _sntprintf_0(fullpath, _T("%s\\%s"), o.config_dir, find_obj.cFileName);
+            if (CheckReadAccess (fullpath))
+                AddConfigFileToList(o.num_configs++, find_obj.cFileName, o.config_dir);
         }
         else if (match_type == match_dir)
         {
@@ -184,4 +204,9 @@ BuildFileList()
 
         FindClose(find_handle);
     }
+    if (o.num_configs == 0 && warn_no_configs)
+    {
+        ShowLocalizedMsg(IDS_NFO_NO_CONFIGS, o.config_dir);
+        warn_no_configs = 0;
+    }
 }

options.h

@@ -67,7 +67,8 @@ typedef enum {
     disconnecting,
     suspending,
     suspended,
-    resuming
+    resuming,
+    timedout
 } conn_state_t;
 
 /* Connections parameters */

res/openvpn-gui-res-en.rc

@@ -182,6 +182,7 @@ BEGIN
 
     /* OpenVPN */
     IDS_ERR_MANY_CONFIGS "OpenVPN GUI does not support more than %d configs. Please contact the author if you have the need for more."
+    IDS_NFO_NO_CONFIGS "No readable connection profiles (config files) found at %s"
     IDS_ERR_ONE_CONN_OLD_VER "You can only have one connection running at the same time when using an older version on OpenVPN than 2.0-beta6."
     IDS_ERR_STOP_SERV_OLD_VER "You cannot use OpenVPN GUI to start a connection while the OpenVPN Service is running (with OpenVPN 1.5/1.6). Stop OpenVPN Service first if you want to use OpenVPN GUI."
     IDS_ERR_CREATE_EVENT "CreateEvent failed on exit event: %s"
@@ -226,6 +227,8 @@ BEGIN
     IDS_ERR_CONFIG_EXIST "There already exist a config file named '%s'. You cannot " \
                          "have multiple config files with the same name, even if " \
                          "they reside in diffrent folders."
+    IDS_NFO_CONN_TIMEOUT "Connecting to management interface failed.\n" \
+                         "View log file (%s) for more details."
     /* main - Resources */
     IDS_ERR_OPEN_DEBUG_FILE "Error opening debug file (%s) for output."
     IDS_ERR_CREATE_PATH "Could not create %s path:\n%s"
@@ -322,6 +325,8 @@ BEGIN
     IDS_ERR_OPEN_SCMGR "OpenSCManager failed (%d)"
     IDS_ERR_STOP_SERVICE "Failed to stop OpenVPN Service"
     IDS_NFO_RESTARTED "OpenVPN Service Restarted."
+    IDS_ERR_ACCESS_SERVICE_PIPE "Access to service pipe failed."
+    IDS_ERR_WRITE_SERVICE_PIPE "Writing to service pipe failed."
 
     /* registry */
     IDS_ERR_GET_WINDOWS_DIR "Error getting Windows Directory."