Re: [vdagent-windows v1] vdagent-win: check for locked session

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Hey, it looks good. But according to docs, it will not work on WinXP

https://msdn.microsoft.com/en-us/library/windows/desktop/aa383828%28v=vs.85%29.a
spx

Pavel

On Fri, 2016-05-06 at 13:50 +0200, Victor Toso wrote:
> From WTSRegisterSessionNotification() we are aware of session changes
> (WM_WTSSESSION_CHANGE) such as Lock/Unlock events.
> 
> We can use that to disable features such as drag-and-drop.
> Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1323628
> ---
>  vdagent/vdagent.cpp | 20 +++++++++++++++++++-
>  1 file changed, 19 insertions(+), 1 deletion(-)
> 
> diff --git a/vdagent/vdagent.cpp b/vdagent/vdagent.cpp
> index c976665..a01bc70 100644
> --- a/vdagent/vdagent.cpp
> +++ b/vdagent/vdagent.cpp
> @@ -146,6 +146,7 @@ private:
>      uint32_t _in_msg_pos;
>      bool _pending_input;
>      bool _running;
> +    bool _session_is_locked;
>      bool _desktop_switch;
>      DesktopLayout* _desktop_layout;
>      bool _updating_display_config;
> @@ -205,6 +206,7 @@ VDAgent::VDAgent()
>      , _in_msg_pos (0)
>      , _pending_input (false)
>      , _running (false)
> +    , _session_is_locked (false)
>      , _desktop_switch (false)
>      , _desktop_layout (NULL)
>      , _display_setting (VD_AGENT_REGISTRY_KEY)
> @@ -1282,7 +1284,19 @@ void VDAgent::dispatch_message(VDAgentMessage* msg,
> uint32_t port)
>      case VD_AGENT_ANNOUNCE_CAPABILITIES:
>          res = handle_announce_capabilities((VDAgentAnnounceCapabilities*)msg-
> >data, msg->size);
>          break;
> -    case VD_AGENT_FILE_XFER_START:
> +    case VD_AGENT_FILE_XFER_START: {
> +        VDAgentFileXferStatusMessage status;
> +        if (_session_is_locked) {
> +            VDAgentFileXferStartMessage *s = (VDAgentFileXferStartMessage
> *)msg->data;
> +            status.id = s->id;
> +            status.result = VD_AGENT_FILE_XFER_STATUS_ERROR;
> +            vd_printf("Fail to start file-xfer %u due: Locked session",
> status.id);
> +            write_message(VD_AGENT_FILE_XFER_STATUS, sizeof(status),
> &status);
> +        } else if (_file_xfer.dispatch(msg, &status)) {
> +            write_message(VD_AGENT_FILE_XFER_STATUS, sizeof(status),
> &status);
> +        }
> +        break;
> +    }
>      case VD_AGENT_FILE_XFER_STATUS:
>      case VD_AGENT_FILE_XFER_DATA: {
>          VDAgentFileXferStatusMessage status;
> @@ -1489,6 +1503,10 @@ LRESULT CALLBACK VDAgent::wnd_proc(HWND hwnd, UINT
> message, WPARAM wparam, LPARA
>      case WM_WTSSESSION_CHANGE:
>          if (wparam == WTS_SESSION_LOGON) {
>              a->set_control_event(CONTROL_LOGON);
> +        } else if (wparam == WTS_SESSION_LOCK) {
> +            a->_session_is_locked = true;
> +        } else if (wparam == WTS_SESSION_UNLOCK) {
> +            a->_session_is_locked = false;
>          }
>          break;
>      default:
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