vnc_plugin.c

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/*
 * Remmina - The GTK+ Remote Desktop Client
 * Copyright (C) 2010-2011 Vic Lee
 * Copyright (C) 2014-2015 Antenore Gatta, Fabio Castelli, Giovanni Panozzo
 * Copyright (C) 2016-2022 Antenore Gatta, Giovanni Panozzo
 * Copyright (C) 2022-2023 Antenore Gatta, Giovanni Panozzo, Hiroyuki Tanaka
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA  02110-1301, USA.
 *
 *  In addition, as a special exception, the copyright holders give
 *  permission to link the code of portions of this program with the
 *  OpenSSL library under certain conditions as described in each
 *  individual source file, and distribute linked combinations
 *  including the two.
 *  You must obey the GNU General Public License in all respects
 *  for all of the code used other than OpenSSL. *  If you modify
 *  file(s) with this exception, you may extend this exception to your
 *  version of the file(s), but you are not obligated to do so. *  If you
 *  do not wish to do so, delete this exception statement from your
 *  version. *  If you delete this exception statement from all source
 *  files in the program, then also delete it here.
 *
 */
 
#include <gmodule.h>
#include "vnc_plugin.h"
#include <rfb/rfbclient.h>
 
#define REMMINA_PLUGIN_VNC_FEATURE_PREF_QUALITY            1
#define REMMINA_PLUGIN_VNC_FEATURE_PREF_VIEWONLY           2
#define REMMINA_PLUGIN_VNC_FEATURE_PREF_DISABLESERVERINPUT 3
#define REMMINA_PLUGIN_VNC_FEATURE_TOOL_REFRESH            4
#define REMMINA_PLUGIN_VNC_FEATURE_TOOL_CHAT               5
#define REMMINA_PLUGIN_VNC_FEATURE_SCALE                   6
#define REMMINA_PLUGIN_VNC_FEATURE_UNFOCUS                 7
#define REMMINA_PLUGIN_VNC_FEATURE_TOOL_SENDCTRLALTDEL     8
#define REMMINA_PLUGIN_VNC_FEATURE_PREF_COLOR              9
#define REMMINA_PLUGIN_VNC_FEATURE_DYNRESUPDATE            10
 
#define VNC_DEFAULT_PORT 5900
 
#define GET_PLUGIN_DATA(gp) (RemminaPluginVncData *)g_object_get_data(G_OBJECT(gp), "plugin-data")
 
static RemminaPluginService *remmina_plugin_service = NULL;
 
static int dot_cursor_x_hot = 2;
static int dot_cursor_y_hot = 2;
static const gchar *dot_cursor_xpm[] =
{ "5 5 3 1", "  c None", ". c #000000", "+  c #FFFFFF", " ... ", ".+++.", ".+ +.", ".+++.", " ... " };
 
 
#define LOCK_BUFFER(t)      if (t) { CANCEL_DEFER } pthread_mutex_lock(&gpdata->buffer_mutex);
#define UNLOCK_BUFFER(t)    pthread_mutex_unlock(&gpdata->buffer_mutex); if (t) { CANCEL_ASYNC }
 
struct onMainThread_cb_data {
    enum { FUNC_UPDATE_SCALE } func;
    GtkWidget *     widget;
    gint            x, y, width, height;
    RemminaProtocolWidget * gp;
    gboolean        scale;
 
    /* Mutex for thread synchronization */
    pthread_mutex_t     mu;
    /* Flag to catch cancellations */
    gboolean        cancelled;
};
 
static gboolean onMainThread_cb(struct onMainThread_cb_data *d)
{
    TRACE_CALL(__func__);
    if (!d->cancelled) {
        switch (d->func) {
        case FUNC_UPDATE_SCALE:
            remmina_plugin_vnc_update_scale(d->gp, d->scale);
            break;
        }
        pthread_mutex_unlock(&d->mu);
    } else {
        /* thread has been cancelled, so we must free d memory here */
        g_free(d);
    }
    return G_SOURCE_REMOVE;
}
 
 
static void onMainThread_cleanup_handler(gpointer data)
{
    TRACE_CALL(__func__);
    struct onMainThread_cb_data *d = data;
 
    d->cancelled = TRUE;
}
 
 
static void onMainThread_schedule_callback_and_wait(struct onMainThread_cb_data *d)
{
    TRACE_CALL(__func__);
    d->cancelled = FALSE;
    pthread_cleanup_push(onMainThread_cleanup_handler, d);
    pthread_mutex_init(&d->mu, NULL);
    pthread_mutex_lock(&d->mu);
    gdk_threads_add_idle((GSourceFunc)onMainThread_cb, (gpointer)d);
 
    pthread_mutex_lock(&d->mu);
 
    pthread_cleanup_pop(0);
    pthread_mutex_unlock(&d->mu);
    pthread_mutex_destroy(&d->mu);
}
 
static gboolean check_for_endianness()
{
    unsigned int x = 1;
    char *c = (char *)&x;
 
    return (int)*c;
}
 
static void remmina_plugin_vnc_event_push(RemminaProtocolWidget *gp, gint event_type, gpointer p1, gpointer p2, gpointer p3)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    RemminaPluginVncEvent *event;
 
    event = g_new(RemminaPluginVncEvent, 1);
    event->event_type = event_type;
    switch (event_type) {
    case REMMINA_PLUGIN_VNC_EVENT_KEY:
        event->event_data.key.keyval = GPOINTER_TO_UINT(p1);
        event->event_data.key.pressed = GPOINTER_TO_INT(p2);
        break;
    case REMMINA_PLUGIN_VNC_EVENT_POINTER:
        event->event_data.pointer.x = GPOINTER_TO_INT(p1);
        event->event_data.pointer.y = GPOINTER_TO_INT(p2);
        event->event_data.pointer.button_mask = GPOINTER_TO_INT(p3);
        break;
    case REMMINA_PLUGIN_VNC_EVENT_CUTTEXT:
    case REMMINA_PLUGIN_VNC_EVENT_CHAT_SEND:
        event->event_data.text.text = g_strdup((char *)p1);
        break;
    default:
        break;
    }
 
    pthread_mutex_lock(&gpdata->vnc_event_queue_mutex);
    g_queue_push_tail(gpdata->vnc_event_queue, event);
    pthread_mutex_unlock(&gpdata->vnc_event_queue_mutex);
 
    if (write(gpdata->vnc_event_pipe[1], "\0", 1)) {
        /* Ignore */
    }
}
 
static void remmina_plugin_vnc_event_free(RemminaPluginVncEvent *event)
{
    TRACE_CALL(__func__);
    switch (event->event_type) {
    case REMMINA_PLUGIN_VNC_EVENT_CUTTEXT:
    case REMMINA_PLUGIN_VNC_EVENT_CHAT_SEND:
        g_free(event->event_data.text.text);
        break;
    default:
        break;
    }
    g_free(event);
}
 
static void remmina_plugin_vnc_event_free_all(RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    RemminaPluginVncEvent *event;
 
    /* This is called from main thread after plugin thread has
     * been closed, so no queue locking is necessary here */
    while ((event = g_queue_pop_head(gpdata->vnc_event_queue)) != NULL)
        remmina_plugin_vnc_event_free(event);
}
 
static void remmina_plugin_vnc_scale_area(RemminaProtocolWidget *gp, gint *x, gint *y, gint *w, gint *h)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    GtkAllocation widget_allocation;
    gint width, height;
    gint sx, sy, sw, sh;
 
    if (gpdata->rgb_buffer == NULL)
        return;
 
    width = remmina_plugin_service->protocol_plugin_get_width(gp);
    height = remmina_plugin_service->protocol_plugin_get_height(gp);
 
    gtk_widget_get_allocation(GTK_WIDGET(gp), &widget_allocation);
 
    if (widget_allocation.width == width && widget_allocation.height == height)
        return; /* Same size, no scaling */
 
    /* We have to extend the scaled region 2 scaled pixels, to avoid gaps */
    sx = MIN(MAX(0, (*x) * widget_allocation.width / width - widget_allocation.width / width - 2), widget_allocation.width - 1);
    sy = MIN(MAX(0, (*y) * widget_allocation.height / height - widget_allocation.height / height - 2), widget_allocation.height - 1);
    sw = MIN(widget_allocation.width - sx, (*w) * widget_allocation.width / width + widget_allocation.width / width + 4);
    sh = MIN(widget_allocation.height - sy, (*h) * widget_allocation.height / height + widget_allocation.height / height + 4);
 
    *x = sx;
    *y = sy;
    *w = sw;
    *h = sh;
}
 
static void remmina_plugin_vnc_update_scale(RemminaProtocolWidget *gp, gboolean scale)
{
    TRACE_CALL(__func__);
    /* This function can be called from a non main thread */
 
    RemminaPluginVncData *gpdata;
    gint width, height;
    
    if (!remmina_plugin_service->is_main_thread()) {
        struct onMainThread_cb_data *d;
        d = (struct onMainThread_cb_data *)g_malloc(sizeof(struct onMainThread_cb_data));
        d->func = FUNC_UPDATE_SCALE;
        d->gp = gp;
        d->scale = scale;
        onMainThread_schedule_callback_and_wait(d);
        g_free(d);
        return;
    }
 
    gpdata = GET_PLUGIN_DATA(gp);
 
    width = remmina_plugin_service->protocol_plugin_get_width(gp);
    height = remmina_plugin_service->protocol_plugin_get_height(gp);
    if (scale)
        /* In scaled mode, drawing_area will get its dimensions from its parent */
        gtk_widget_set_size_request(GTK_WIDGET(gpdata->drawing_area), -1, -1);
    else
        /* In non scaled mode, the plugins forces dimensions of drawing area */
        gtk_widget_set_size_request(GTK_WIDGET(gpdata->drawing_area), width, height);
 
    remmina_plugin_service->protocol_plugin_update_align(gp);
}
 
gboolean remmina_plugin_vnc_setcursor(RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    GdkCursor *cur;
 
    LOCK_BUFFER(FALSE);
    gpdata->queuecursor_handler = 0;
 
    if (gpdata->queuecursor_surface) {
        cur = gdk_cursor_new_from_surface(gdk_display_get_default(), gpdata->queuecursor_surface, gpdata->queuecursor_x,
                          gpdata->queuecursor_y);
        gdk_window_set_cursor(gtk_widget_get_window(gpdata->drawing_area), cur);
        g_object_unref(cur);
        cairo_surface_destroy(gpdata->queuecursor_surface);
        gpdata->queuecursor_surface = NULL;
    } else {
        gdk_window_set_cursor(gtk_widget_get_window(gpdata->drawing_area), NULL);
    }
    UNLOCK_BUFFER(FALSE);
 
    return FALSE;
}
 
static void remmina_plugin_vnc_queuecursor(RemminaProtocolWidget *gp, cairo_surface_t *surface, gint x, gint y)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
 
    if (gpdata->queuecursor_surface)
        cairo_surface_destroy(gpdata->queuecursor_surface);
    gpdata->queuecursor_surface = surface;
    gpdata->queuecursor_x = x;
    gpdata->queuecursor_y = y;
    if (!gpdata->queuecursor_handler)
        gpdata->queuecursor_handler = IDLE_ADD((GSourceFunc)remmina_plugin_vnc_setcursor, gp);
}
 
typedef struct _RemminaKeyVal {
    guint   keyval;
    guint16 keycode;
} RemminaKeyVal;
 
/***************************** LibVNCClient related codes *********************************/
 
static const uint32_t remmina_plugin_vnc_no_encrypt_auth_types[] =
{ rfbNoAuth, rfbVncAuth, rfbMSLogon, 0 };
 
static RemminaPluginVncEvent *remmina_plugin_vnc_event_queue_pop_head(RemminaPluginVncData *gpdata)
{
    RemminaPluginVncEvent *event;
 
    CANCEL_DEFER;
    pthread_mutex_lock(&gpdata->vnc_event_queue_mutex);
 
    event = g_queue_pop_head(gpdata->vnc_event_queue);
 
    pthread_mutex_unlock(&gpdata->vnc_event_queue_mutex);
    CANCEL_ASYNC;
 
    return event;
}
 
static void remmina_plugin_vnc_process_vnc_event(RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    RemminaPluginVncEvent *event;
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    rfbClient *cl;
    gchar buf[100];
 
    cl = (rfbClient *)gpdata->client;
    while ((event = remmina_plugin_vnc_event_queue_pop_head(gpdata)) != NULL) {
        if (cl) {
            switch (event->event_type) {
            case REMMINA_PLUGIN_VNC_EVENT_KEY:
                SendKeyEvent(cl, event->event_data.key.keyval, event->event_data.key.pressed);
                break;
            case REMMINA_PLUGIN_VNC_EVENT_POINTER:
                SendPointerEvent(cl, event->event_data.pointer.x, event->event_data.pointer.y,
                         event->event_data.pointer.button_mask);
                break;
            case REMMINA_PLUGIN_VNC_EVENT_CUTTEXT:
                if (event->event_data.text.text) {
                    rfbClientLog("sending clipboard text '%s'\n", event->event_data.text.text);
                    SendClientCutText(cl, event->event_data.text.text, strlen(event->event_data.text.text));
                }
                break;
            case REMMINA_PLUGIN_VNC_EVENT_CHAT_OPEN:
                TextChatOpen(cl);
                break;
            case REMMINA_PLUGIN_VNC_EVENT_CHAT_SEND:
                TextChatSend(cl, event->event_data.text.text);
                break;
            case REMMINA_PLUGIN_VNC_EVENT_CHAT_CLOSE:
                TextChatClose(cl);
                TextChatFinish(cl);
                break;
            default:
                rfbClientLog("Ignoring VNC event: 0x%x\n", event->event_type);
                break;
            }
        }
        remmina_plugin_vnc_event_free(event);
    }
    if (read(gpdata->vnc_event_pipe[0], buf, sizeof(buf))) {
        /* Ignore */
    }
}
 
typedef struct _RemminaPluginVncCuttextParam {
    RemminaProtocolWidget * gp;
    gchar *         text;
    gint            textlen;
} RemminaPluginVncCuttextParam;
 
static void remmina_plugin_vnc_update_quality(rfbClient *cl, gint quality)
{
    TRACE_CALL(__func__);
    RemminaProtocolWidget *gp = rfbClientGetClientData(cl, NULL);
    RemminaFile *remminafile;
    gchar *enc = NULL;
 
    switch (quality) {
    case 9:
        cl->appData.useBGR233 = 0;
        cl->appData.encodingsString = "copyrect zlib hextile raw";
        cl->appData.compressLevel = 1;
        cl->appData.qualityLevel = 9;
        break;
    case 2:
        cl->appData.useBGR233 = 0;
        cl->appData.encodingsString = "tight zrle ultra copyrect hextile zlib corre rre raw";
        cl->appData.compressLevel = 2;
        cl->appData.qualityLevel = 7;
        break;
    case 1:
        cl->appData.useBGR233 = 0;
        cl->appData.encodingsString = "tight zrle ultra copyrect hextile zlib corre rre raw";
        cl->appData.compressLevel = 3;
        cl->appData.qualityLevel = 5;
        break;
    case 0:
    default:
        // bpp8 and tight encoding is not supported in libvnc
        cl->appData.useBGR233 = 1;
        cl->appData.encodingsString = "copyrect zrle ultra zlib hextile corre rre raw";
        cl->appData.qualityLevel = 1;
        break;
    }
    remminafile = remmina_plugin_service->protocol_plugin_get_file(gp);
    enc = g_strdup(remmina_plugin_service->file_get_string(remminafile, "encodings"));
    if (enc) {
        cl->appData.encodingsString = g_strdup(enc);
        g_free (enc), enc = NULL;
    }
    gboolean tight = remmina_plugin_service->file_get_int (remminafile, "tightencoding", FALSE);
    if (tight) {
        if (!g_strrstr ( g_strdup(cl->appData.encodingsString), "tight\0")) {
            cl->appData.encodingsString = g_strdup_printf("%s %s", "tight", g_strdup(cl->appData.encodingsString));
        }
    }
 
    REMMINA_PLUGIN_DEBUG("Quality: %d", quality);
    REMMINA_PLUGIN_DEBUG("Encodings: %s", cl->appData.encodingsString);
}
 
static void remmina_plugin_vnc_update_colordepth(rfbClient *cl, gint colordepth)
{
    TRACE_CALL(__func__);
 
    cl->format.depth = colordepth;
    cl->appData.requestedDepth = colordepth;
 
    cl->format.trueColour = 1;
    cl->format.bigEndian = check_for_endianness()?FALSE:TRUE;
 
    switch (colordepth) {
    case 8:
        cl->format.depth = 8;
        cl->format.bitsPerPixel = 8;
        cl->format.blueMax = 3;
        cl->format.blueShift = 6;
        cl->format.greenMax = 7;
        cl->format.greenShift = 3;
        cl->format.redMax = 7;
        cl->format.redShift = 0;
        break;
    case 16:
        cl->format.depth = 15;
        cl->format.bitsPerPixel = 16;
        cl->format.redShift = 11;
        cl->format.greenShift = 6;
        cl->format.blueShift = 1;
        cl->format.redMax = 31;
        cl->format.greenMax = 31;
        cl->format.blueMax = 31;
        break;
    case 32:
    default:
        cl->format.depth = 24;
        cl->format.bitsPerPixel = 32;
        cl->format.blueShift = 0;
        cl->format.redShift = 16;
        cl->format.greenShift = 8;
        cl->format.blueMax = 0xff;
        cl->format.redMax = 0xff;
        cl->format.greenMax = 0xff;
        break;
    }
 
    rfbClientLog("colordepth          = %d\n", colordepth);
    rfbClientLog("format.depth        = %d\n", cl->format.depth);
    rfbClientLog("format.bitsPerPixel = %d\n", cl->format.bitsPerPixel);
    rfbClientLog("format.blueShift    = %d\n", cl->format.blueShift);
    rfbClientLog("format.redShift     = %d\n", cl->format.redShift);
    rfbClientLog("format.trueColour   = %d\n", cl->format.trueColour);
    rfbClientLog("format.greenShift   = %d\n", cl->format.greenShift);
    rfbClientLog("format.blueMax      = %d\n", cl->format.blueMax);
    rfbClientLog("format.redMax       = %d\n", cl->format.redMax);
    rfbClientLog("format.greenMax     = %d\n", cl->format.greenMax);
    rfbClientLog("format.bigEndian    = %d\n", cl->format.bigEndian);
}
 
static rfbBool remmina_plugin_vnc_rfb_allocfb(rfbClient *cl)
{
    TRACE_CALL(__func__);
    RemminaProtocolWidget *gp = rfbClientGetClientData(cl, NULL);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    gint width, height, depth, size;
    gboolean scale;
    cairo_surface_t *new_surface, *old_surface;
 
    width = cl->width;
    height = cl->height;
    depth = cl->format.bitsPerPixel;
    size = width * height * (depth / 8);
 
    new_surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
    if (cairo_surface_status(new_surface) != CAIRO_STATUS_SUCCESS)
        return FALSE;
    old_surface = gpdata->rgb_buffer;
 
    LOCK_BUFFER(TRUE);
 
    remmina_plugin_service->protocol_plugin_set_width(gp, width);
    remmina_plugin_service->protocol_plugin_set_height(gp, height);
 
    gpdata->rgb_buffer = new_surface;
 
    if (gpdata->vnc_buffer)
        g_free(gpdata->vnc_buffer);
    gpdata->vnc_buffer = (guchar *)g_malloc(size);
    cl->frameBuffer = gpdata->vnc_buffer;
 
    UNLOCK_BUFFER(TRUE);
 
    if (old_surface)
        cairo_surface_destroy(old_surface);
 
    scale = (remmina_plugin_service->remmina_protocol_widget_get_current_scale_mode(gp) != REMMINA_PROTOCOL_WIDGET_SCALE_MODE_NONE);
    remmina_plugin_vnc_update_scale(gp, scale);
 
    /* Notify window of change so that scroll border can be hidden or shown if needed */
    remmina_plugin_service->protocol_plugin_desktop_resize(gp);
 
    /* Refresh the client’s updateRect - bug in xvncclient */
    cl->updateRect.w = width;
    cl->updateRect.h = height;
 
    return TRUE;
}
 
static gint remmina_plugin_vnc_bits(gint n)
{
    TRACE_CALL(__func__);
    gint b = 0;
 
    while (n) {
        b++;
        n >>= 1;
    }
    return b ? b : 1;
}
 
static gboolean remmina_plugin_vnc_queue_draw_area_real(RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    gint x, y, w, h;
 
    if (GTK_IS_WIDGET(gp) && gpdata->connected) {
        LOCK_BUFFER(FALSE);
        x = gpdata->queuedraw_x;
        y = gpdata->queuedraw_y;
        w = gpdata->queuedraw_w;
        h = gpdata->queuedraw_h;
        gpdata->queuedraw_handler = 0;
        UNLOCK_BUFFER(FALSE);
 
        gtk_widget_queue_draw_area(GTK_WIDGET(gp), x, y, w, h);
    }
    return FALSE;
}
 
static void remmina_plugin_vnc_queue_draw_area(RemminaProtocolWidget *gp, gint x, gint y, gint w, gint h)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    gint nx2, ny2, ox2, oy2;
 
    LOCK_BUFFER(TRUE);
    if (gpdata->queuedraw_handler) {
        nx2 = x + w;
        ny2 = y + h;
        ox2 = gpdata->queuedraw_x + gpdata->queuedraw_w;
        oy2 = gpdata->queuedraw_y + gpdata->queuedraw_h;
        gpdata->queuedraw_x = MIN(gpdata->queuedraw_x, x);
        gpdata->queuedraw_y = MIN(gpdata->queuedraw_y, y);
        gpdata->queuedraw_w = MAX(ox2, nx2) - gpdata->queuedraw_x;
        gpdata->queuedraw_h = MAX(oy2, ny2) - gpdata->queuedraw_y;
    } else {
        gpdata->queuedraw_x = x;
        gpdata->queuedraw_y = y;
        gpdata->queuedraw_w = w;
        gpdata->queuedraw_h = h;
        gpdata->queuedraw_handler = IDLE_ADD((GSourceFunc)remmina_plugin_vnc_queue_draw_area_real, gp);
    }
    UNLOCK_BUFFER(TRUE);
}
 
static void remmina_plugin_vnc_rfb_fill_buffer(rfbClient *cl, guchar *dest, gint dest_rowstride, guchar *src,
                           gint src_rowstride, guchar *mask, gint w, gint h)
{
    TRACE_CALL(__func__);
    guchar *srcptr;
    gint bytesPerPixel;
    guint32 src_pixel;
    gint ix, iy;
    gint i;
    guchar c;
    gint rs, gs, bs, rm, gm, bm, rl, gl, bl, rr, gr, br;
    gint r;
    guint32 *destptr;
 
    union {
        struct {
            guchar a, r, g, b;
        } colors;
        guint32 argb;
    } dst_pixel;
 
    bytesPerPixel = cl->format.bitsPerPixel / 8;
    switch (cl->format.bitsPerPixel) {
    case 32:
        /* The following codes fill in the Alpha channel swap red/green value */
        for (iy = 0; iy < h; iy++) {
            destptr = (guint32 *)(dest + iy * dest_rowstride);
            srcptr = src + iy * src_rowstride;
            for (ix = 0; ix < w; ix++) {
                if (!mask || *mask++) {
                    dst_pixel.colors.a = 0xff;
                    dst_pixel.colors.r = *(srcptr + 2);
                    dst_pixel.colors.g = *(srcptr + 1);
                    dst_pixel.colors.b = *srcptr;
                    *destptr++ = ntohl(dst_pixel.argb);
                } else {
                    *destptr++ = 0;
                }
                srcptr += 4;
            }
        }
        break;
    default:
        rm = cl->format.redMax;
        gm = cl->format.greenMax;
        bm = cl->format.blueMax;
        rr = remmina_plugin_vnc_bits(rm);
        gr = remmina_plugin_vnc_bits(gm);
        br = remmina_plugin_vnc_bits(bm);
        rl = 8 - rr;
        gl = 8 - gr;
        bl = 8 - br;
        rs = cl->format.redShift;
        gs = cl->format.greenShift;
        bs = cl->format.blueShift;
        for (iy = 0; iy < h; iy++) {
            destptr = (guint32 *)(dest + iy * dest_rowstride);
            srcptr = src + iy * src_rowstride;
            for (ix = 0; ix < w; ix++) {
                src_pixel = 0;
                for (i = 0; i < bytesPerPixel; i++)
                    src_pixel += (*srcptr++) << (8 * i);
 
                if (!mask || *mask++) {
                    dst_pixel.colors.a = 0xff;
                    c = (guchar)((src_pixel >> rs) & rm) << rl;
                    for (r = rr; r < 8; r *= 2)
                        c |= c >> r;
                    dst_pixel.colors.r = c;
                    c = (guchar)((src_pixel >> gs) & gm) << gl;
                    for (r = gr; r < 8; r *= 2)
                        c |= c >> r;
                    dst_pixel.colors.g = c;
                    c = (guchar)((src_pixel >> bs) & bm) << bl;
                    for (r = br; r < 8; r *= 2)
                        c |= c >> r;
                    dst_pixel.colors.b = c;
                    *destptr++ = ntohl(dst_pixel.argb);
                } else {
                    *destptr++ = 0;
                }
            }
        }
        break;
    }
}
 
static void remmina_plugin_vnc_rfb_updatefb(rfbClient *cl, int x, int y, int w, int h)
{
    TRACE_CALL(__func__);
    RemminaProtocolWidget *gp = rfbClientGetClientData(cl, NULL);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    gint bytesPerPixel;
    gint rowstride;
    gint width;
 
    LOCK_BUFFER(TRUE);
 
    if (w >= 1 || h >= 1) {
        width = remmina_plugin_service->protocol_plugin_get_width(gp);
        bytesPerPixel = cl->format.bitsPerPixel / 8;
        rowstride = cairo_image_surface_get_stride(gpdata->rgb_buffer);
        cairo_surface_flush(gpdata->rgb_buffer);
        remmina_plugin_vnc_rfb_fill_buffer(cl, cairo_image_surface_get_data(gpdata->rgb_buffer) + y * rowstride + x * 4,
                           rowstride, gpdata->vnc_buffer + ((y * width + x) * bytesPerPixel), width * bytesPerPixel, NULL,
                           w, h);
        cairo_surface_mark_dirty(gpdata->rgb_buffer);
    }
 
    if ((remmina_plugin_service->remmina_protocol_widget_get_current_scale_mode(gp) != REMMINA_PROTOCOL_WIDGET_SCALE_MODE_NONE))
        remmina_plugin_vnc_scale_area(gp, &x, &y, &w, &h);
 
    UNLOCK_BUFFER(TRUE);
 
    remmina_plugin_vnc_queue_draw_area(gp, x, y, w, h);
}
 
static void remmina_plugin_vnc_rfb_finished(rfbClient *cl) __attribute__ ((unused));
static void remmina_plugin_vnc_rfb_finished(rfbClient *cl)
{
    TRACE_CALL(__func__);
    REMMINA_PLUGIN_DEBUG("FinishedFrameBufferUpdate");
}
 
static void remmina_plugin_vnc_rfb_led_state(rfbClient *cl, int value, int pad)
{
    TRACE_CALL(__func__);
    REMMINA_PLUGIN_DEBUG("Led state - value: %d, pad: %d", value, pad);
}
 
static gboolean remmina_plugin_vnc_queue_cuttext(RemminaPluginVncCuttextParam *param)
{
    TRACE_CALL(__func__);
    RemminaProtocolWidget *gp = param->gp;
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    GDateTime *t;
    glong diff;
    const char *cur_charset;
    gchar *text;
    gsize br, bw;
 
    if (GTK_IS_WIDGET(gp) && gpdata->connected) {
        t = g_date_time_new_now_utc();
        diff = g_date_time_difference(t, gpdata->clipboard_timer) / 100000; // tenth of second
        if (diff >= 10) {
            g_date_time_unref(gpdata->clipboard_timer);
            gpdata->clipboard_timer = t;
            /* Convert text from VNC latin-1 to current GTK charset (usually UTF-8) */
            g_get_charset(&cur_charset);
            text = g_convert_with_fallback(param->text, param->textlen, cur_charset, "ISO-8859-1", "?", &br, &bw, NULL);
            gtk_clipboard_set_text(gtk_clipboard_get(GDK_SELECTION_CLIPBOARD), text, bw);
            g_free(text);
        } else {
            g_date_time_unref(t);
        }
    }
    g_free(param->text);
    g_free(param);
    return FALSE;
}
 
static void remmina_plugin_vnc_rfb_cuttext(rfbClient *cl, const char *text, int textlen)
{
    TRACE_CALL(__func__);
    RemminaPluginVncCuttextParam *param;
 
    param = g_new(RemminaPluginVncCuttextParam, 1);
    param->gp = (RemminaProtocolWidget *)rfbClientGetClientData(cl, NULL);
    param->text = g_malloc(textlen);
    memcpy(param->text, text, textlen);
    param->textlen = textlen;
    IDLE_ADD((GSourceFunc)remmina_plugin_vnc_queue_cuttext, param);
}
 
static char *
remmina_plugin_vnc_rfb_password(rfbClient *cl)
{
    TRACE_CALL(__func__);
    RemminaProtocolWidget *gp = rfbClientGetClientData(cl, NULL);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    RemminaFile *remminafile;
    gchar *pwd = NULL;
 
    gpdata->auth_called = TRUE;
    remminafile = remmina_plugin_service->protocol_plugin_get_file(gp);
 
    if (gpdata->auth_first)
        pwd = g_strdup(remmina_plugin_service->file_get_string(remminafile, "password"));
    if (!pwd) {
        gboolean save;
        gint ret;
        gboolean disablepasswordstoring = remmina_plugin_service->file_get_int(remminafile, "disablepasswordstoring", FALSE);
        ret = remmina_plugin_service->protocol_plugin_init_auth(gp,
                                    (disablepasswordstoring ? 0 : REMMINA_MESSAGE_PANEL_FLAG_SAVEPASSWORD),
                                    _("Enter VNC password"),
                                    NULL,
                                    remmina_plugin_service->file_get_string(remminafile, "password"),
                                    NULL,
                                    NULL);
        if (ret != GTK_RESPONSE_OK) {
            gpdata->connected = FALSE;
            return NULL;
        }
        pwd = remmina_plugin_service->protocol_plugin_init_get_password(gp);
        save = remmina_plugin_service->protocol_plugin_init_get_savepassword(gp);
        if (save)
            remmina_plugin_service->file_set_string(remminafile, "password", pwd);
        else
            remmina_plugin_service->file_set_string(remminafile, "password", NULL);
    }
    return pwd;
}
 
static rfbCredential *
remmina_plugin_vnc_rfb_credential(rfbClient *cl, int credentialType)
{
    TRACE_CALL(__func__);
    rfbCredential *cred;
    RemminaProtocolWidget *gp = rfbClientGetClientData(cl, NULL);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    RemminaFile *remminafile;
    gint ret;
    gchar *s1, *s2;
    gboolean disablepasswordstoring;
 
    gpdata->auth_called = TRUE;
    remminafile = remmina_plugin_service->protocol_plugin_get_file(gp);
 
    cred = g_new0(rfbCredential, 1);
 
    switch (credentialType) {
    case rfbCredentialTypeUser:
 
        s1 = g_strdup(remmina_plugin_service->file_get_string(remminafile, "username"));
 
        s2 = g_strdup(remmina_plugin_service->file_get_string(remminafile, "password"));
 
        if (gpdata->auth_first && s1 && s2) {
            cred->userCredential.username = s1;
            cred->userCredential.password = s2;
        } else {
            g_free(s1);
            g_free(s2);
 
            disablepasswordstoring = remmina_plugin_service->file_get_int(remminafile, "disablepasswordstoring", FALSE);
            ret = remmina_plugin_service->protocol_plugin_init_auth(gp,
                                        (disablepasswordstoring ? 0 : REMMINA_MESSAGE_PANEL_FLAG_SAVEPASSWORD) | REMMINA_MESSAGE_PANEL_FLAG_USERNAME,
                                        _("Enter VNC authentication credentials"),
                                        remmina_plugin_service->file_get_string(remminafile, "username"),
                                        remmina_plugin_service->file_get_string(remminafile, "password"),
                                        NULL,
                                        NULL);
            if (ret == GTK_RESPONSE_OK) {
                gboolean save = remmina_plugin_service->protocol_plugin_init_get_savepassword(gp);
                cred->userCredential.username = remmina_plugin_service->protocol_plugin_init_get_username(gp);
                cred->userCredential.password = remmina_plugin_service->protocol_plugin_init_get_password(gp);
                if (save) {
                    remmina_plugin_service->file_set_string(remminafile, "username", cred->userCredential.username);
                    remmina_plugin_service->file_set_string(remminafile, "password", cred->userCredential.password);
                } else {
                    remmina_plugin_service->file_set_string(remminafile, "username", NULL);
                    remmina_plugin_service->file_set_string(remminafile, "password", NULL);
                }
            } else {
                g_free(cred);
                cred = NULL;
                gpdata->connected = FALSE;
            }
        }
        break;
 
    case rfbCredentialTypeX509:
        if (gpdata->auth_first &&
            remmina_plugin_service->file_get_string(remminafile, "cacert")) {
            cred->x509Credential.x509CACertFile = g_strdup(remmina_plugin_service->file_get_string(remminafile, "cacert"));
            cred->x509Credential.x509CACrlFile = g_strdup(remmina_plugin_service->file_get_string(remminafile, "cacrl"));
            cred->x509Credential.x509ClientCertFile = g_strdup(remmina_plugin_service->file_get_string(remminafile, "clientcert"));
            cred->x509Credential.x509ClientKeyFile = g_strdup(remmina_plugin_service->file_get_string(remminafile, "clientkey"));
        } else {
            ret = remmina_plugin_service->protocol_plugin_init_authx509(gp);
 
            if (ret == GTK_RESPONSE_OK) {
                cred->x509Credential.x509CACertFile = remmina_plugin_service->protocol_plugin_init_get_cacert(gp);
                cred->x509Credential.x509CACrlFile = remmina_plugin_service->protocol_plugin_init_get_cacrl(gp);
                cred->x509Credential.x509ClientCertFile = remmina_plugin_service->protocol_plugin_init_get_clientcert(gp);
                cred->x509Credential.x509ClientKeyFile = remmina_plugin_service->protocol_plugin_init_get_clientkey(gp);
            } else {
                g_free(cred);
                cred = NULL;
                gpdata->connected = FALSE;
            }
        }
        break;
 
    default:
        g_free(cred);
        cred = NULL;
        break;
    }
    return cred;
}
 
static void remmina_plugin_vnc_rfb_cursor_shape(rfbClient *cl, int xhot, int yhot, int width, int height, int bytesPerPixel)
{
    TRACE_CALL(__func__);
    RemminaProtocolWidget *gp = rfbClientGetClientData(cl, NULL);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
 
    if (!gtk_widget_get_window(GTK_WIDGET(gp)))
        return;
 
    if (width && height) {
        gint stride = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, width);
        guchar *data = g_malloc(stride * height);
        remmina_plugin_vnc_rfb_fill_buffer(cl, data, stride, cl->rcSource,
                           width * cl->format.bitsPerPixel / 8, cl->rcMask, width, height);
        cairo_surface_t *surface = cairo_image_surface_create_for_data(data, CAIRO_FORMAT_ARGB32, width, height, stride);
        if (cairo_surface_status(surface) != CAIRO_STATUS_SUCCESS) {
            g_free(data);
            return;
        }
        if (cairo_surface_set_user_data(surface, NULL, NULL, g_free) != CAIRO_STATUS_SUCCESS) {
            g_free(data);
            return;
        }
 
        LOCK_BUFFER(TRUE);
        remmina_plugin_vnc_queuecursor(gp, surface, xhot, yhot);
        UNLOCK_BUFFER(TRUE);
    }
}
 
static void remmina_plugin_vnc_rfb_bell(rfbClient *cl)
{
    TRACE_CALL(__func__);
    REMMINA_PLUGIN_DEBUG("Bell message received");
    RemminaProtocolWidget *gp;
    RemminaFile *remminafile;
    GdkWindow *window;
 
    gp = (RemminaProtocolWidget *)(rfbClientGetClientData(cl, NULL));
    remminafile = remmina_plugin_service->protocol_plugin_get_file(gp);
 
    if (remmina_plugin_service->file_get_int(remminafile, "disableserverbell", FALSE))
        return;
 
    window = gtk_widget_get_window(GTK_WIDGET(gp));
 
    if (window)
        gdk_window_beep(window);
    REMMINA_PLUGIN_DEBUG("Beep emitted");
}
 
/* Translate known VNC messages. It’s for intltool only, not for gcc */
#ifdef __DO_NOT_COMPILE_ME__
N_("Unable to connect to VNC server")
N_("Couldn’t convert '%s' to host address")
N_("VNC connection failed: %s")
N_("Your connection has been rejected.")
#endif
#define MAX_ERROR_LENGTH 1000
static gchar vnc_error[MAX_ERROR_LENGTH + 1];
static gboolean vnc_encryption_disable_requested;
 
static void remmina_plugin_vnc_rfb_output(const char *format, ...)
{
    TRACE_CALL(__func__);
    gchar *f, *p, *ff;
 
    if (!rfbEnableClientLogging)
        return;
 
    va_list args;
    va_start(args, format);
    /* eliminate the last \n */
    f = g_strdup(format);
    if (f[strlen(f) - 1] == '\n') f[strlen(f) - 1] = '\0';
 
    if (g_strcmp0(f, "VNC connection failed: %s") == 0) {
        p = va_arg(args, gchar *);
        g_snprintf(vnc_error, MAX_ERROR_LENGTH, _(f), _(p));
    } else if (g_strcmp0(f, "The VNC server requested an unknown authentication method. %s") == 0) {
        p = va_arg(args, gchar *);
        if (vnc_encryption_disable_requested) {
            ff = g_strconcat(_("The VNC server requested an unknown authentication method. %s"),
                     ". ",
                     _("Please retry after turning on encryption for this profile."),
                     NULL);
            g_snprintf(vnc_error, MAX_ERROR_LENGTH, ff, p);
            g_free(ff);
        } else {
            g_snprintf(vnc_error, MAX_ERROR_LENGTH, _(f), p);
        }
    } else {
        g_vsnprintf(vnc_error, MAX_ERROR_LENGTH, _(f), args);
    }
    g_free(f);
    va_end(args);
 
    REMMINA_PLUGIN_DEBUG("VNC returned: %s", vnc_error);
}
 
static void remmina_plugin_vnc_chat_on_send(RemminaProtocolWidget *gp, const gchar *text)
{
    TRACE_CALL(__func__);
    gchar *ptr;
 
    /* Need to add a line-feed for UltraVNC */
    ptr = g_strdup_printf("%s\n", text);
    remmina_plugin_vnc_event_push(gp, REMMINA_PLUGIN_VNC_EVENT_CHAT_SEND, ptr, NULL, NULL);
    g_free(ptr);
}
 
static void remmina_plugin_vnc_chat_on_destroy(RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    remmina_plugin_vnc_event_push(gp, REMMINA_PLUGIN_VNC_EVENT_CHAT_CLOSE, NULL, NULL, NULL);
}
 
/* Send CTRL+ALT+DEL keys keystrokes to the plugin drawing_area widget */
static void remmina_plugin_vnc_send_ctrlaltdel(RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    guint keys[] = { GDK_KEY_Control_L, GDK_KEY_Alt_L, GDK_KEY_Delete };
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
 
    remmina_plugin_service->protocol_plugin_send_keys_signals(gpdata->drawing_area,
                                  keys, G_N_ELEMENTS(keys), GDK_KEY_PRESS | GDK_KEY_RELEASE);
}
 
static gboolean remmina_plugin_vnc_close_chat(RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    remmina_plugin_service->protocol_plugin_chat_close(gp);
    return FALSE;
}
 
static gboolean remmina_plugin_vnc_open_chat(RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    rfbClient *cl;
 
    cl = (rfbClient *)gpdata->client;
 
    remmina_plugin_service->protocol_plugin_chat_open(gp, cl->desktopName, remmina_plugin_vnc_chat_on_send,
                              remmina_plugin_vnc_chat_on_destroy);
    remmina_plugin_vnc_event_push(gp, REMMINA_PLUGIN_VNC_EVENT_CHAT_OPEN, NULL, NULL, NULL);
    return FALSE;
}
 
static void remmina_plugin_vnc_rfb_chat(rfbClient *cl, int value, char *text)
{
    TRACE_CALL(__func__);
    RemminaProtocolWidget *gp;
 
    gp = (RemminaProtocolWidget *)(rfbClientGetClientData(cl, NULL));
    switch (value) {
    case rfbTextChatOpen:
        IDLE_ADD((GSourceFunc)remmina_plugin_vnc_open_chat, gp);
        break;
    case rfbTextChatClose:
        /* Do nothing… but wait for the next rfbTextChatFinished signal */
        break;
    case rfbTextChatFinished:
        IDLE_ADD((GSourceFunc)remmina_plugin_vnc_close_chat, gp);
        break;
    default:
        /* value is the text length */
        remmina_plugin_service->protocol_plugin_chat_receive(gp, text);
        break;
    }
}
 
static gboolean remmina_plugin_vnc_incoming_connection(RemminaProtocolWidget *gp, rfbClient *cl)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    fd_set fds;
 
    gpdata->listen_sock = ListenAtTcpPort(cl->listenPort);
    if (gpdata->listen_sock < 0)
        return FALSE;
 
    remmina_plugin_service->protocol_plugin_init_show_listen(gp, cl->listenPort);
 
    remmina_plugin_service->protocol_plugin_start_reverse_tunnel(gp, cl->listenPort);
 
    FD_ZERO(&fds);
    if (gpdata->listen_sock >= 0)
        FD_SET(gpdata->listen_sock, &fds);
 
    select(gpdata->listen_sock + 1, &fds, NULL, NULL, NULL);
 
    if (!FD_ISSET(gpdata->listen_sock, &fds)) {
        close(gpdata->listen_sock);
        gpdata->listen_sock = -1;
        return FALSE;
    }
 
    if (FD_ISSET(gpdata->listen_sock, &fds))
        cl->sock = AcceptTcpConnection(gpdata->listen_sock);
    if (cl->sock >= 0) {
        close(gpdata->listen_sock);
        gpdata->listen_sock = -1;
    }
    if (cl->sock < 0 || !SetNonBlocking(cl->sock))
        return FALSE;
 
    return TRUE;
}
 
 
static gboolean remmina_plugin_vnc_main_loop(RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    gint ret;
    gint i;
    rfbClient *cl;
    fd_set fds;
    struct timeval timeout;
 
    if (!gpdata->connected) {
        gpdata->running = FALSE;
        return FALSE;
    }
 
    cl = (rfbClient *)gpdata->client;
 
    /*
     * Do not explicitly wait while data is on the buffer, see:
     * - https://jira.glyptodon.com/browse/GUAC-1056
     * - https://jira.glyptodon.com/browse/GUAC-1056?focusedCommentId=14348&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14348
     * - https://github.com/apache/guacamole-server/blob/67680bd2d51e7949453f0f7ffc7f4234a1136715/src/protocols/vnc/vnc.c#L155
     */
    if (cl->buffered)
        goto handle_buffered;
 
    timeout.tv_sec = 10;
    timeout.tv_usec = 0;
    FD_ZERO(&fds);
    FD_SET(cl->sock, &fds);
    FD_SET(gpdata->vnc_event_pipe[0], &fds);
    ret = select(MAX(cl->sock, gpdata->vnc_event_pipe[0]) + 1, &fds, NULL, NULL, &timeout);
 
    /* Sometimes it returns <0 when opening a modal dialog in other window. Absolutely weird */
    /* So we continue looping anyway */
    if (ret <= 0)
        return TRUE;
 
    if (FD_ISSET(gpdata->vnc_event_pipe[0], &fds))
        remmina_plugin_vnc_process_vnc_event(gp);
    if (FD_ISSET(cl->sock, &fds)) {
        i = WaitForMessage(cl, 500);
        if (i < 0)
            return TRUE;
handle_buffered:
        if (!HandleRFBServerMessage(cl)) {
            gpdata->running = FALSE;
            if (gpdata->connected && !remmina_plugin_service->protocol_plugin_is_closed(gp))
                remmina_plugin_service->protocol_plugin_signal_connection_closed(gp);
            return FALSE;
        }
    }
 
    return TRUE;
}
 
static gboolean remmina_plugin_vnc_main(RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    RemminaFile *remminafile;
    rfbClient *cl = NULL;
    gchar *host;
    gchar *s = NULL;
    
    remminafile = remmina_plugin_service->protocol_plugin_get_file(gp);
    gpdata->running = TRUE;
 
    rfbClientLog = rfbClientErr = remmina_plugin_vnc_rfb_output;
 
    gint colordepth = remmina_plugin_service->file_get_int(remminafile, "colordepth", 32);
    gint quality = remmina_plugin_service->file_get_int(remminafile, "quality", 9);
 
    while (gpdata->connected) {
        gpdata->auth_called = FALSE;
 
        host = remmina_plugin_service->protocol_plugin_start_direct_tunnel(gp, VNC_DEFAULT_PORT, TRUE);
 
        if (host == NULL) {
            REMMINA_PLUGIN_DEBUG("host is null");
            gpdata->connected = FALSE;
            break;
        }
 
        /* int bitsPerSample,int samplesPerPixel, int bytesPerPixel */
        switch (colordepth) {
        case 8:
            cl = rfbGetClient(2, 3, 1);
            break;
        case 15:
        case 16:
            cl = rfbGetClient(5, 3, 2);
            break;
        case 24:
            cl = rfbGetClient(6, 3, 3);
            break;
        case 32:
        default:
            cl = rfbGetClient(8, 3, 4);
            break;
        }
        REMMINA_PLUGIN_DEBUG("Color depth: %d", colordepth);
        cl->MallocFrameBuffer = remmina_plugin_vnc_rfb_allocfb;
        cl->canHandleNewFBSize = TRUE;
        cl->GetPassword = remmina_plugin_vnc_rfb_password;
        cl->GetCredential = remmina_plugin_vnc_rfb_credential;
        cl->GotFrameBufferUpdate = remmina_plugin_vnc_rfb_updatefb;
        cl->HandleKeyboardLedState = remmina_plugin_vnc_rfb_led_state;
        cl->GotXCutText = (
            remmina_plugin_service->file_get_int(remminafile, "disableclipboard", FALSE) ?
            NULL : remmina_plugin_vnc_rfb_cuttext);
        cl->GotCursorShape = remmina_plugin_vnc_rfb_cursor_shape;
        cl->Bell = remmina_plugin_vnc_rfb_bell;
        cl->HandleTextChat = remmina_plugin_vnc_rfb_chat;
        rfbClientSetClientData(cl, NULL, gp);
 
        if (host[0] == '\0') {
            cl->serverHost = g_strdup(host);
            cl->listenSpecified = TRUE;
            if (remmina_plugin_service->file_get_int(remminafile, "ssh_tunnel_enabled", FALSE))
                /* When we use reverse tunnel, the local port does not really matter.
                 * Hardcode a default port just in case the remote port is customized
                 * to a privilege port then we will have problem listening. */
                cl->listenPort = 5500;
            else
                cl->listenPort = remmina_plugin_service->file_get_int(remminafile, "listenport", 5500);
 
            remmina_plugin_vnc_incoming_connection(gp, cl);
        } else {
            if (strstr(host, "unix://") == host) {
                cl->serverHost = g_strdup(host + strlen("unix://"));
                cl->serverPort  = 0;
            } else {
                remmina_plugin_service->get_server_port(host, VNC_DEFAULT_PORT, &s, &cl->serverPort);
                cl->serverHost = g_strdup(s);
                g_free(s);
                /* Support short-form (:0, :1) */
                if (cl->serverPort < 100)
                    cl->serverPort += VNC_DEFAULT_PORT;
            }
        }
        g_free(host);
        host = NULL;
 
        if (cl->serverHost && strstr(cl->serverHost, "unix://") != cl->serverHost && remmina_plugin_service->file_get_string(remminafile, "proxy")) {
            remmina_plugin_service->get_server_port(
                remmina_plugin_service->file_get_string(remminafile, "server"),
                VNC_DEFAULT_PORT,
                &cl->destHost,
                &cl->destPort);
            remmina_plugin_service->get_server_port(
                remmina_plugin_service->file_get_string(remminafile, "proxy"),
                VNC_DEFAULT_PORT,
                &cl->serverHost,
                &cl->serverPort);
            REMMINA_PLUGIN_DEBUG("cl->serverHost: %s", cl->serverHost);
            REMMINA_PLUGIN_DEBUG("cl->serverPort: %d", cl->serverPort);
            REMMINA_PLUGIN_DEBUG("cl->destHost: %s", cl->destHost);
            REMMINA_PLUGIN_DEBUG("cl->destPort: %d", cl->destPort);
        }
 
        cl->appData.useRemoteCursor = (
            remmina_plugin_service->file_get_int(remminafile, "showcursor", FALSE) ? FALSE : TRUE);
 
        remmina_plugin_vnc_update_quality(cl, quality);
        remmina_plugin_vnc_update_colordepth(cl, colordepth);
        if ((cl->format.depth == 8) && (quality == 9))
            cl->appData.encodingsString = "copyrect zlib hextile raw";
        else if ((cl->format.depth == 8) && (quality == 2))
            cl->appData.encodingsString = "zrle ultra copyrect hextile zlib corre rre raw";
        else if ((cl->format.depth == 8) && (quality == 1))
            cl->appData.encodingsString = "zrle ultra copyrect hextile zlib corre rre raw";
        else if ((cl->format.depth == 8) && (quality == 0))
            cl->appData.encodingsString = "zrle ultra copyrect hextile zlib corre rre raw";
        SetFormatAndEncodings(cl);
 
        if (remmina_plugin_service->file_get_int(remminafile, "disableencryption", FALSE)) {
            vnc_encryption_disable_requested = TRUE;
            SetClientAuthSchemes(cl, remmina_plugin_vnc_no_encrypt_auth_types, -1);
        } else {
            vnc_encryption_disable_requested = FALSE;
        }
 
        if (rfbInitClient(cl, NULL, NULL)) {
            REMMINA_PLUGIN_DEBUG("Client initialization successfull");
            break;
        } else {
            REMMINA_PLUGIN_DEBUG("Client initialization failed");
        }
 
        /* If the authentication is not called, it has to be a fatal error and must quit */
        if (!gpdata->auth_called) {
            REMMINA_PLUGIN_DEBUG("Client not authenticated");
            gpdata->connected = FALSE;
            break;
        }
 
        /* vnc4server reports "already in use" after authentication. Workaround here */
        if (strstr(vnc_error, "The server is already in use")) {
            gpdata->connected = FALSE;
            gpdata->auth_called = FALSE;
            break;
        }
        /* Don't assume authentication failed for known network-related errors in
           libvncclient/sockets.c. */
        if (strstr(vnc_error, "read (") || strstr(vnc_error, "select\n") ||
            strstr(vnc_error, "write\n") || strstr(vnc_error, "Connection timed out")) {
            gpdata->connected = FALSE;
            gpdata->auth_called = FALSE;
            break;
        }
 
        /* Otherwise, it’s a password error. Try to clear saved password if any */
        remmina_plugin_service->file_set_string(remminafile, "password", NULL);
 
        if (!gpdata->connected)
            break;
 
        remmina_plugin_service->protocol_plugin_init_show_retry(gp);
 
        /* It’s safer to sleep a while before reconnect */
        sleep(2);
 
        gpdata->auth_first = FALSE;
    }
 
    if (!gpdata->connected) {
        REMMINA_PLUGIN_DEBUG("Client not connected with error: %s", vnc_error);
        if (cl && !gpdata->auth_called && !(remmina_plugin_service->protocol_plugin_has_error(gp)))
            remmina_plugin_service->protocol_plugin_set_error(gp, "%s", vnc_error);
        gpdata->running = FALSE;
 
        remmina_plugin_service->protocol_plugin_signal_connection_closed(gp);
 
        return FALSE;
    }
 
    REMMINA_PLUGIN_DEBUG("Client connected");
    remmina_plugin_service->protocol_plugin_init_save_cred(gp);
 
    gpdata->client = cl;
 
    remmina_plugin_service->protocol_plugin_signal_connection_opened(gp);
 
    if (remmina_plugin_service->file_get_int(remminafile, "disableserverinput", FALSE))
        PermitServerInput(cl, 1);
 
    if (gpdata->thread) {
        while (remmina_plugin_vnc_main_loop(gp)) {
        }
        gpdata->running = FALSE;
    } else {
        IDLE_ADD((GSourceFunc)remmina_plugin_vnc_main_loop, gp);
    }
 
    return FALSE;
}
 
 
static gpointer
remmina_plugin_vnc_main_thread(gpointer data)
{
    TRACE_CALL(__func__);
    pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
 
    CANCEL_ASYNC
    remmina_plugin_vnc_main((RemminaProtocolWidget *)data);
    return NULL;
}
 
 
static RemminaPluginVncCoordinates remmina_plugin_vnc_scale_coordinates(GtkWidget *widget, RemminaProtocolWidget *gp, gint x, gint y)
{
    GtkAllocation widget_allocation;
    RemminaPluginVncCoordinates result;
 
    if ((remmina_plugin_service->remmina_protocol_widget_get_current_scale_mode(gp) != REMMINA_PROTOCOL_WIDGET_SCALE_MODE_NONE)) {
        gtk_widget_get_allocation(widget, &widget_allocation);
        result.x = x * remmina_plugin_service->protocol_plugin_get_width(gp) / widget_allocation.width;
        result.y = y * remmina_plugin_service->protocol_plugin_get_height(gp) / widget_allocation.height;
    } else {
        result.x = x;
        result.y = y;
    }
 
    return result;
}
 
static gboolean remmina_plugin_vnc_on_motion(GtkWidget *widget, GdkEventMotion *event, RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    RemminaFile *remminafile;
    RemminaPluginVncCoordinates coordinates;
 
    if (!gpdata->connected || !gpdata->client)
        return FALSE;
    remminafile = remmina_plugin_service->protocol_plugin_get_file(gp);
    if (remmina_plugin_service->file_get_int(remminafile, "viewonly", FALSE))
        return FALSE;
 
    coordinates = remmina_plugin_vnc_scale_coordinates(widget, gp, event->x, event->y);
    remmina_plugin_vnc_event_push(gp, REMMINA_PLUGIN_VNC_EVENT_POINTER, GINT_TO_POINTER(coordinates.x), GINT_TO_POINTER(coordinates.y),
                      GINT_TO_POINTER(gpdata->button_mask));
    return TRUE;
}
 
static gboolean remmina_plugin_vnc_on_button(GtkWidget *widget, GdkEventButton *event, RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    RemminaFile *remminafile;
    RemminaPluginVncCoordinates coordinates;
    gint mask;
 
    if (!gpdata->connected || !gpdata->client)
        return FALSE;
    remminafile = remmina_plugin_service->protocol_plugin_get_file(gp);
    if (remmina_plugin_service->file_get_int(remminafile, "viewonly", FALSE))
        return FALSE;
 
    /* We only accept 3 buttons */
    if (event->button < 1 || event->button > 3)
        return FALSE;
    /* We bypass 2button-press and 3button-press events */
    if (event->type != GDK_BUTTON_PRESS && event->type != GDK_BUTTON_RELEASE)
        return TRUE;
 
    mask = (1 << (event->button - 1));
    gpdata->button_mask = (event->type == GDK_BUTTON_PRESS ? (gpdata->button_mask | mask) :
                   (gpdata->button_mask & (0xff - mask)));
 
    coordinates = remmina_plugin_vnc_scale_coordinates(widget, gp, event->x, event->y);
    remmina_plugin_vnc_event_push(gp, REMMINA_PLUGIN_VNC_EVENT_POINTER, GINT_TO_POINTER(coordinates.x), GINT_TO_POINTER(coordinates.y),
                      GINT_TO_POINTER(gpdata->button_mask));
    return TRUE;
}
 
static gint delta_to_mask(float delta, float *accum, gint mask_plus, gint mask_minus)
{
    *accum += delta;
    if (*accum >= 1.0) {
        *accum = 0.0;
        return mask_plus;
    } else if (*accum <= -1.0) {
        *accum = 0.0;
        return mask_minus;
    }
    return 0;
}
 
static gboolean remmina_plugin_vnc_on_scroll(GtkWidget *widget, GdkEventScroll *event, RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    RemminaFile *remminafile;
    RemminaPluginVncCoordinates coordinates;
    gint mask;
 
    if (!gpdata->connected || !gpdata->client)
        return FALSE;
    remminafile = remmina_plugin_service->protocol_plugin_get_file(gp);
    if (remmina_plugin_service->file_get_int(remminafile, "viewonly", FALSE))
        return FALSE;
 
    switch (event->direction) {
    case GDK_SCROLL_UP:
        mask = (1 << 3);
        gpdata->scroll_y_accumulator = 0;
        break;
    case GDK_SCROLL_DOWN:
        mask = (1 << 4);
        gpdata->scroll_y_accumulator = 0;
        break;
    case GDK_SCROLL_LEFT:
        mask = (1 << 5);
        gpdata->scroll_x_accumulator = 0;
        break;
    case GDK_SCROLL_RIGHT:
        mask = (1 << 6);
        gpdata->scroll_x_accumulator = 0;
        break;
#if GTK_CHECK_VERSION(3, 4, 0)
    case GDK_SCROLL_SMOOTH:
        /* RFB does not seems to support SMOOTH scroll, so we accumulate GTK delta requested
         * up to 1.0 and then send a normal RFB wheel scroll when the accumulator reaches 1.0 */
        mask = delta_to_mask(event->delta_y, &(gpdata->scroll_y_accumulator), (1 << 4), (1 << 3));
        mask |= delta_to_mask(event->delta_x, &(gpdata->scroll_x_accumulator), (1 << 6), (1 << 5));
        if (!mask)
            return FALSE;
        break;
#endif
    default:
        return FALSE;
    }
 
    coordinates = remmina_plugin_vnc_scale_coordinates(widget, gp, event->x, event->y);
    remmina_plugin_vnc_event_push(gp, REMMINA_PLUGIN_VNC_EVENT_POINTER, GINT_TO_POINTER(coordinates.x), GINT_TO_POINTER(coordinates.y),
                      GINT_TO_POINTER(mask | gpdata->button_mask));
    remmina_plugin_vnc_event_push(gp, REMMINA_PLUGIN_VNC_EVENT_POINTER, GINT_TO_POINTER(coordinates.x), GINT_TO_POINTER(coordinates.y),
                      GINT_TO_POINTER(gpdata->button_mask));
 
    return TRUE;
}
 
static void remmina_plugin_vnc_release_key(RemminaProtocolWidget *gp, guint16 keycode)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    RemminaKeyVal *k;
    gint i;
 
    if (!gpdata)
        return;
 
    if (keycode == 0) {
        /* Send all release key events for previously pressed keys */
        for (i = 0; i < gpdata->pressed_keys->len; i++) {
            k = g_ptr_array_index(gpdata->pressed_keys, i);
            remmina_plugin_vnc_event_push(gp, REMMINA_PLUGIN_VNC_EVENT_KEY, GUINT_TO_POINTER(k->keyval),
                              GINT_TO_POINTER(FALSE), NULL);
            g_free(k);
        }
        g_ptr_array_set_size(gpdata->pressed_keys, 0);
    } else {
        /* Unregister the keycode only */
        for (i = 0; i < gpdata->pressed_keys->len; i++) {
            k = g_ptr_array_index(gpdata->pressed_keys, i);
            if (k->keycode == keycode) {
                g_free(k);
                g_ptr_array_remove_index_fast(gpdata->pressed_keys, i);
                break;
            }
        }
    }
}
 
static gboolean remmina_plugin_vnc_on_key(GtkWidget *widget, GdkEventKey *event, RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    RemminaFile *remminafile;
    RemminaKeyVal *k;
    guint event_keyval;
    guint keyval;
 
    if (!gpdata->connected || !gpdata->client)
        return FALSE;
    remminafile = remmina_plugin_service->protocol_plugin_get_file(gp);
    if (remmina_plugin_service->file_get_int(remminafile, "viewonly", FALSE))
        return FALSE;
 
    gpdata->scroll_x_accumulator = 0;
    gpdata->scroll_y_accumulator = 0;
 
    /* When sending key release, try first to find out a previously sent keyval
     * to workaround bugs like https://bugs.freedesktop.org/show_bug.cgi?id=7430 */
 
    event_keyval = event->keyval;
    if (event->type == GDK_KEY_RELEASE) {
        for (int i = 0; i < gpdata->pressed_keys->len; i++) {
            k = g_ptr_array_index(gpdata->pressed_keys, i);
            if (k->keycode == event->hardware_keycode) {
                event_keyval = k->keyval;
                break;
            }
        }
    }
 
    keyval = remmina_plugin_service->pref_keymap_get_keyval(remmina_plugin_service->file_get_string(remminafile, "keymap"),
                                event_keyval);
 
    remmina_plugin_vnc_event_push(gp, REMMINA_PLUGIN_VNC_EVENT_KEY, GUINT_TO_POINTER(keyval),
                      GINT_TO_POINTER(event->type == GDK_KEY_PRESS ? TRUE : FALSE), NULL);
 
    /* Register/unregister the pressed key */
    if (event->type == GDK_KEY_PRESS) {
        k = g_new(RemminaKeyVal, 1);
        k->keyval = keyval;
        k->keycode = event->hardware_keycode;
        g_ptr_array_add(gpdata->pressed_keys, k);
    } else {
        remmina_plugin_vnc_release_key(gp, event->hardware_keycode);
    }
    return TRUE;
}
 
static void remmina_plugin_vnc_on_cuttext_request(GtkClipboard *clipboard, const gchar *text, RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    GDateTime *t;
    glong diff;
    gsize br, bw;
    gchar *latin1_text;
    const char *cur_charset;
 
    if (text) {
        /* A timer (1 second) to avoid clipboard "loopback": text cut out from VNC won’t paste back into VNC */
        t = g_date_time_new_now_utc();
        diff = g_date_time_difference(t, gpdata->clipboard_timer) / 100000; // tenth of second
        if (diff < 10)
            return;
        g_date_time_unref(gpdata->clipboard_timer);
        gpdata->clipboard_timer = t;
        /* Convert text from current charset to latin-1 before sending to remote server.
         * See RFC6143 7.5.6 */
        g_get_charset(&cur_charset);
        latin1_text = g_convert_with_fallback(text, -1, "ISO-8859-1", cur_charset, "?", &br, &bw, NULL);
        remmina_plugin_vnc_event_push(gp, REMMINA_PLUGIN_VNC_EVENT_CUTTEXT, (gpointer)latin1_text, NULL, NULL);
        g_free(latin1_text);
    }
}
 
static void remmina_plugin_vnc_on_cuttext(GtkClipboard *clipboard, GdkEvent *event, RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    RemminaFile *remminafile;
 
    if (!gpdata->connected || !gpdata->client)
        return;
    remminafile = remmina_plugin_service->protocol_plugin_get_file(gp);
    if (remmina_plugin_service->file_get_int(remminafile, "viewonly", FALSE))
        return;
 
    gtk_clipboard_request_text(clipboard, (GtkClipboardTextReceivedFunc)remmina_plugin_vnc_on_cuttext_request, gp);
}
 
static void remmina_plugin_vnc_on_realize(RemminaProtocolWidget *gp, gpointer data)
{
    TRACE_CALL(__func__);
    RemminaFile *remminafile;
    GdkCursor *cursor;
    GdkPixbuf *pixbuf;
 
    remminafile = remmina_plugin_service->protocol_plugin_get_file(gp);
 
    if (remmina_plugin_service->file_get_int(remminafile, "showcursor", FALSE)) {
        /* Hide local cursor (show a small dot instead) */
        pixbuf = gdk_pixbuf_new_from_xpm_data(dot_cursor_xpm);
        cursor = gdk_cursor_new_from_pixbuf(gdk_display_get_default(), pixbuf, dot_cursor_x_hot, dot_cursor_y_hot);
        g_object_unref(pixbuf);
        gdk_window_set_cursor(gtk_widget_get_window(GTK_WIDGET(gp)), cursor);
        g_object_unref(cursor);
    }
}
 
/******************************************************************************************/
 
static gboolean remmina_plugin_vnc_open_connection(RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    RemminaFile *remminafile;
 
    remminafile = remmina_plugin_service->protocol_plugin_get_file(gp);
 
    gpdata->connected = TRUE;
    gchar *server;
    gint port;
    const gchar* raw_server;
 
    remmina_plugin_service->protocol_plugin_register_hostkey(gp, gpdata->drawing_area);
 
    g_signal_connect(G_OBJECT(gp), "realize", G_CALLBACK(remmina_plugin_vnc_on_realize), NULL);
    g_signal_connect(G_OBJECT(gpdata->drawing_area), "motion-notify-event", G_CALLBACK(remmina_plugin_vnc_on_motion), gp);
    g_signal_connect(G_OBJECT(gpdata->drawing_area), "button-press-event", G_CALLBACK(remmina_plugin_vnc_on_button), gp);
    g_signal_connect(G_OBJECT(gpdata->drawing_area), "button-release-event", G_CALLBACK(remmina_plugin_vnc_on_button), gp);
    g_signal_connect(G_OBJECT(gpdata->drawing_area), "scroll-event", G_CALLBACK(remmina_plugin_vnc_on_scroll), gp);
    g_signal_connect(G_OBJECT(gpdata->drawing_area), "key-press-event", G_CALLBACK(remmina_plugin_vnc_on_key), gp);
    g_signal_connect(G_OBJECT(gpdata->drawing_area), "key-release-event", G_CALLBACK(remmina_plugin_vnc_on_key), gp);
 
    if (!remmina_plugin_service->file_get_int(remminafile, "disableclipboard", FALSE))
        gpdata->clipboard_handler = g_signal_connect(G_OBJECT(gtk_clipboard_get(GDK_SELECTION_CLIPBOARD)),
                                 "owner-change", G_CALLBACK(remmina_plugin_vnc_on_cuttext), gp);
 
 
    if (pthread_create(&gpdata->thread, NULL, remmina_plugin_vnc_main_thread, gp)) {
        /* I don’t think this will ever happen… */
        g_print("Could not initialize pthread. Falling back to non-thread mode…\n");
        g_timeout_add(0, (GSourceFunc)remmina_plugin_vnc_main, gp);
        gpdata->thread = 0;
    }
 
    raw_server = remmina_plugin_service->file_get_string(remminafile, "server");
 
    if (raw_server && strstr(raw_server, "unix://") == raw_server) {
        REMMINA_PLUGIN_AUDIT(_("Connected to %s via VNC"), raw_server);
    } else {
        remmina_plugin_service->get_server_port(raw_server,
                VNC_DEFAULT_PORT,
                &server,
                &port);
 
        REMMINA_PLUGIN_AUDIT(_("Connected to %s:%d via VNC"), server, port);
        g_free(server), server = NULL;
    }
#if LIBVNCSERVER_CHECK_VERSION_VERSION(0, 9, 14)
    remmina_plugin_service->protocol_plugin_unlock_dynres(gp);
#endif
    return TRUE;
}
 
static gboolean remmina_plugin_vnc_close_connection_timeout(RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
 
    gchar *server;
    gint port;
 
    RemminaFile *remminafile = remmina_plugin_service->protocol_plugin_get_file(gp);
    remmina_plugin_service->get_server_port(remmina_plugin_service->file_get_string(remminafile, "server"),
            VNC_DEFAULT_PORT,
            &server,
            &port);
 
    REMMINA_PLUGIN_AUDIT(_("Disconnected from %s:%d via VNC"), server, port);
    g_free(server), server = NULL;
 
    /* wait until the running attribute is set to false by the VNC thread */
    if (gpdata->running)
        return TRUE;
 
    /* unregister the clipboard monitor */
    if (gpdata->clipboard_handler) {
        g_signal_handler_disconnect(G_OBJECT(gtk_clipboard_get(GDK_SELECTION_CLIPBOARD)), gpdata->clipboard_handler);
        gpdata->clipboard_handler = 0;
    }
 
    if (gpdata->queuecursor_handler) {
        g_source_remove(gpdata->queuecursor_handler);
        gpdata->queuecursor_handler = 0;
    }
    if (gpdata->queuecursor_surface) {
        cairo_surface_destroy(gpdata->queuecursor_surface);
        gpdata->queuecursor_surface = NULL;
    }
 
    if (gpdata->queuedraw_handler) {
        g_source_remove(gpdata->queuedraw_handler);
        gpdata->queuedraw_handler = 0;
    }
    if (gpdata->listen_sock >= 0)
        close(gpdata->listen_sock);
    if (gpdata->client) {
        rfbClientCleanup((rfbClient *)gpdata->client);
        gpdata->client = NULL;
    }
    if (gpdata->rgb_buffer) {
        cairo_surface_destroy(gpdata->rgb_buffer);
        gpdata->rgb_buffer = NULL;
    }
    if (gpdata->vnc_buffer) {
        g_free(gpdata->vnc_buffer);
        gpdata->vnc_buffer = NULL;
    }
    g_ptr_array_free(gpdata->pressed_keys, TRUE);
    g_date_time_unref(gpdata->clipboard_timer);
    remmina_plugin_vnc_event_free_all(gp);
    g_queue_free(gpdata->vnc_event_queue);
    pthread_mutex_destroy(&gpdata->vnc_event_queue_mutex);
    close(gpdata->vnc_event_pipe[0]);
    close(gpdata->vnc_event_pipe[1]);
 
 
    pthread_mutex_destroy(&gpdata->buffer_mutex);
    remmina_plugin_service->protocol_plugin_signal_connection_closed(gp);
 
    return FALSE;
}
 
static gboolean remmina_plugin_vnc_close_connection(RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
 
    gpdata->connected = FALSE;
 
    if (gpdata->thread) {
        pthread_cancel(gpdata->thread);
        if (gpdata->thread) pthread_join(gpdata->thread, NULL);
        gpdata->running = FALSE;
        remmina_plugin_vnc_close_connection_timeout(gp);
    } else {
        g_timeout_add(200, (GSourceFunc)remmina_plugin_vnc_close_connection_timeout, gp);
    }
 
    return FALSE;
}
 
static gboolean remmina_plugin_vnc_query_feature(RemminaProtocolWidget *gp, const RemminaProtocolFeature *feature)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    switch (feature->id) {
    case REMMINA_PLUGIN_VNC_FEATURE_PREF_DISABLESERVERINPUT:
        return SupportsClient2Server((rfbClient *)(gpdata->client), rfbSetServerInput) ? TRUE : FALSE;
    case REMMINA_PLUGIN_VNC_FEATURE_TOOL_CHAT:
        return SupportsClient2Server((rfbClient *)(gpdata->client), rfbTextChat) ? TRUE : FALSE;
    default:
        return TRUE;
    }
}
 
static void remmina_plugin_vnc_call_feature(RemminaProtocolWidget *gp, const RemminaProtocolFeature *feature)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    RemminaFile *remminafile;
    rfbClient*  client;
    uint8_t previous_bpp;
    remminafile = remmina_plugin_service->protocol_plugin_get_file(gp);
    switch (feature->id) {
    case REMMINA_PLUGIN_VNC_FEATURE_PREF_QUALITY:
        remmina_plugin_vnc_update_quality((rfbClient *)(gpdata->client),
                          remmina_plugin_service->file_get_int(remminafile, "quality", 9));
        remmina_plugin_vnc_update_colordepth((rfbClient *)(gpdata->client),
                             remmina_plugin_service->file_get_int(remminafile, "colordepth", 32));
        SetFormatAndEncodings((rfbClient *)(gpdata->client));
        break;
    case REMMINA_PLUGIN_VNC_FEATURE_PREF_COLOR:
        client = (rfbClient *)(gpdata->client);
        previous_bpp = client->format.bitsPerPixel;
        remmina_plugin_vnc_update_colordepth(client,
                             remmina_plugin_service->file_get_int(remminafile, "colordepth", 32));
        SetFormatAndEncodings(client);
        //Need to clear away old and reallocate if we're increasing bpp 
        if (client->format.bitsPerPixel > previous_bpp){
            remmina_plugin_vnc_rfb_allocfb((rfbClient *)(gpdata->client));
            SendFramebufferUpdateRequest((rfbClient *)(gpdata->client), 0, 0,
                         remmina_plugin_service->protocol_plugin_get_width(gp),
                         remmina_plugin_service->protocol_plugin_get_height(gp), FALSE);
        }
        break;
    case REMMINA_PLUGIN_VNC_FEATURE_PREF_VIEWONLY:
        break;
    case REMMINA_PLUGIN_VNC_FEATURE_PREF_DISABLESERVERINPUT:
        PermitServerInput((rfbClient *)(gpdata->client),
                  remmina_plugin_service->file_get_int(remminafile, "disableserverinput", FALSE) ? 1 : 0);
        break;
    case REMMINA_PLUGIN_VNC_FEATURE_UNFOCUS:
        remmina_plugin_vnc_release_key(gp, 0);
        break;
    case REMMINA_PLUGIN_VNC_FEATURE_SCALE:
        remmina_plugin_vnc_update_scale(gp, remmina_plugin_service->file_get_int(remminafile, "scale", FALSE));
        break;
    case REMMINA_PLUGIN_VNC_FEATURE_TOOL_REFRESH:
        SendFramebufferUpdateRequest((rfbClient *)(gpdata->client), 0, 0,
                         remmina_plugin_service->protocol_plugin_get_width(gp),
                         remmina_plugin_service->protocol_plugin_get_height(gp), FALSE);
        break;
    case REMMINA_PLUGIN_VNC_FEATURE_TOOL_CHAT:
        remmina_plugin_vnc_open_chat(gp);
        break;
    case REMMINA_PLUGIN_VNC_FEATURE_TOOL_SENDCTRLALTDEL:
        remmina_plugin_vnc_send_ctrlaltdel(gp);
        break;
    default:
        break;
    }
}
 
/* Send a keystroke to the plugin window */
static void remmina_plugin_vnc_keystroke(RemminaProtocolWidget *gp, const guint keystrokes[], const gint keylen)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
 
    remmina_plugin_service->protocol_plugin_send_keys_signals(gpdata->drawing_area,
                                  keystrokes, keylen, GDK_KEY_PRESS | GDK_KEY_RELEASE);
    return;
}
 
#if LIBVNCSERVER_CHECK_VERSION_VERSION(0, 9, 14)
static gboolean remmina_plugin_vnc_on_size_allocate(GtkWidget *widget, GtkAllocation *alloc, RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    RemminaScaleMode scale_mode = remmina_plugin_service->remmina_protocol_widget_get_current_scale_mode(gp);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
 
    if (scale_mode == REMMINA_PROTOCOL_WIDGET_SCALE_MODE_DYNRES){
        char str[1024];
        sprintf(str, "DEBUG: %d x %d", alloc->width, alloc->height);
        TRACE_CALL(str);
        if (gpdata->client){
            SendExtDesktopSize(gpdata->client, alloc->width, alloc->height);
        }
    }
    return TRUE;
}
#endif
 
static gboolean remmina_plugin_vnc_on_draw(GtkWidget *widget, cairo_t *context, RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata = GET_PLUGIN_DATA(gp);
    cairo_surface_t *surface;
    gint width, height;
    GtkAllocation widget_allocation;
 
    LOCK_BUFFER(FALSE);
 
    surface = gpdata->rgb_buffer;
    if (!surface) {
        UNLOCK_BUFFER(FALSE);
        return FALSE;
    }
 
    width = remmina_plugin_service->protocol_plugin_get_width(gp);
    height = remmina_plugin_service->protocol_plugin_get_height(gp);
 
    if ((remmina_plugin_service->remmina_protocol_widget_get_current_scale_mode(gp) != REMMINA_PROTOCOL_WIDGET_SCALE_MODE_NONE)) {
        gtk_widget_get_allocation(widget, &widget_allocation);
        cairo_scale(context,
                (double)widget_allocation.width / width,
                (double)widget_allocation.height / height);
    }
 
    cairo_rectangle(context, 0, 0, width, height);
    cairo_set_source_surface(context, surface, 0, 0);
    cairo_fill(context);
 
    UNLOCK_BUFFER(FALSE);
    return TRUE;
}
 
static void remmina_plugin_vnc_init(RemminaProtocolWidget *gp)
{
    TRACE_CALL(__func__);
    RemminaPluginVncData *gpdata;
    gint flags;
    gdouble aspect_ratio;
 
    gpdata = g_new0(RemminaPluginVncData, 1);
    g_object_set_data_full(G_OBJECT(gp), "plugin-data", gpdata, g_free);
 
    gboolean disable_smooth_scrolling = FALSE;
    RemminaFile *remminafile = remmina_plugin_service->protocol_plugin_get_file(gp);
 
    disable_smooth_scrolling = remmina_plugin_service->file_get_int(remminafile, "disablesmoothscrolling", FALSE);
    REMMINA_PLUGIN_DEBUG("Disable smooth scrolling is set to %d", disable_smooth_scrolling);
 
    gpdata->drawing_area = gtk_drawing_area_new();
    gtk_widget_show(gpdata->drawing_area);
 
    aspect_ratio = remmina_plugin_service->file_get_double(remminafile, "aspect_ratio", 0);
    if (aspect_ratio > 0){
        GtkWidget* aspectframe = gtk_aspect_frame_new(NULL, 0, 0, aspect_ratio, FALSE);
 
        gtk_frame_set_shadow_type(GTK_FRAME(aspectframe), GTK_SHADOW_NONE);
        gtk_widget_show(aspectframe);
        gtk_container_add(GTK_CONTAINER(aspectframe), gpdata->drawing_area);
        gtk_container_add(GTK_CONTAINER(gp), aspectframe);
    }
    else{
        gtk_container_add(GTK_CONTAINER(gp), gpdata->drawing_area);
    }
 
    gtk_widget_add_events(
        gpdata->drawing_area,
        GDK_POINTER_MOTION_MASK | GDK_BUTTON_PRESS_MASK
        | GDK_BUTTON_RELEASE_MASK | GDK_KEY_PRESS_MASK
        | GDK_KEY_RELEASE_MASK
        | GDK_SCROLL_MASK);
    gtk_widget_set_can_focus(gpdata->drawing_area, TRUE);
 
    if (!disable_smooth_scrolling) {
        REMMINA_PLUGIN_DEBUG("Adding GDK_SMOOTH_SCROLL_MASK");
        gtk_widget_add_events(gpdata->drawing_area, GDK_SMOOTH_SCROLL_MASK);
    }
 
 
    g_signal_connect(G_OBJECT(gpdata->drawing_area), "draw", G_CALLBACK(remmina_plugin_vnc_on_draw), gp);
#if LIBVNCSERVER_CHECK_VERSION_VERSION(0, 9, 14)
    g_signal_connect(G_OBJECT(gpdata->drawing_area), "size-allocate", G_CALLBACK(remmina_plugin_vnc_on_size_allocate), gp);
#endif
    gpdata->auth_first = TRUE;
    gpdata->clipboard_timer = g_date_time_new_now_utc();
    gpdata->listen_sock = -1;
    gpdata->pressed_keys = g_ptr_array_new();
    gpdata->vnc_event_queue = g_queue_new();
    pthread_mutex_init(&gpdata->vnc_event_queue_mutex, NULL);
    if (pipe(gpdata->vnc_event_pipe)) {
        g_print("Error creating pipes.\n");
        gpdata->vnc_event_pipe[0] = 0;
        gpdata->vnc_event_pipe[1] = 0;
    }
    flags = fcntl(gpdata->vnc_event_pipe[0], F_GETFL, 0);
    fcntl(gpdata->vnc_event_pipe[0], F_SETFL, flags | O_NONBLOCK);
 
    pthread_mutex_init(&gpdata->buffer_mutex, NULL);
}
 
/* Array of key/value pairs for color depths */
static gpointer colordepth_list[] =
{
    "32", N_("True colour (32 bpp)"),
    "16", N_("High colour (16 bpp)"),
    "8",  N_("256 colours (8 bpp)"),
    NULL
};
 
/* Array of key/value pairs for quality selection */
static gpointer quality_list[] =
{
    "2", N_("Good"),
    "9", N_("Best (slowest)"),
    "1", N_("Medium"),
    "0", N_("Poor (fastest)"),
    NULL
};
 
static gchar repeater_tooltip[] =
    N_("Connect to VNC using a repeater:\n"
       "  • The server field must contain the repeater ID, e.g. ID:123456789\n"
       "  • The repeater field have to be set to the repeater IP and port, like:\n"
       "    10.10.10.12:5901\n"
       "  • From the remote VNC server, you will connect to\n"
       "    the repeater, e.g. with x11vnc:\n"
       "    x11vnc -connect repeater=ID:123456789+10.10.10.12:5500");
 
static gchar vnciport_tooltip[] =
    N_("Listening for remote VNC connection:\n"
       "  • The “Listen on port” field is the port Remmina will listen to,\n"
       "    e.g. 8888\n"
       "  • From the remote VNC server, you will connect to\n"
       "    Remmina, e.g. with x11vnc:\n"
       "    x11vnc -display :0 -connect 192.168.1.36:8888");
 
static gchar aspect_ratio_tooltip[] =
    N_("Lock the aspect ratio when dynamic resolution is enabled:\n"
       "\n"
       "  • The aspect ratio should be entered as a decimal number, e.g. 1.777\n"
       "  • 16:9 corresponds roughly to 1.7777, 4:3 corresponds roughly to 1.333\n"
       "  • The default value of 0 does not enforce any aspect ratio");       
 
static gchar vncencodings_tooltip[] =
    N_("Overriding the pre-set VNC encoding quality:\n"
       "\n"
       "  • “Poor (fastest)” sets encoding to “copyrect zlib hextile raw”\n"
       "  • “Medium” sets encoding to “tight zrle ultra copyrect hextile zlib corre rre raw”\n"
       "  • “Good” sets encoding to “tight zrle ultra copyrect hextile zlib corre rre raw”\n"
       "  • “Best (slowest)” sets encoding to “copyrect zrle ultra zlib hextile corre rre raw”");
 
/* Array of RemminaProtocolSetting for basic settings.
 * Each item is composed by:
 * a) RemminaProtocolSettingType for setting type
 * b) Setting name
 * c) Setting description
 * d) Compact disposition
 * e) Values for REMMINA_PROTOCOL_SETTING_TYPE_SELECT or REMMINA_PROTOCOL_SETTING_TYPE_COMBO
 * f) Setting tooltip
 * g) Validation data pointer, will be passed to the validation callback method.
 * h) Validation callback method (Can be NULL. Every entry will be valid then.)
 *      use following prototype:
 *      gboolean mysetting_validator_method(gpointer key, gpointer value,
 *                          gpointer validator_data);
 *      gpointer key is a gchar* containing the setting's name,
 *      gpointer value contains the value which should be validated,
 *      gpointer validator_data contains your passed data.
 */
static const RemminaProtocolSetting remmina_plugin_vnc_basic_settings[] =
{
    { REMMINA_PROTOCOL_SETTING_TYPE_SERVER,   "server", NULL,            FALSE, "_rfb._tcp",     NULL,         NULL, NULL },
    { REMMINA_PROTOCOL_SETTING_TYPE_TEXT,     "proxy",  N_("Repeater"),      FALSE, NULL,        repeater_tooltip, NULL, NULL },
    { REMMINA_PROTOCOL_SETTING_TYPE_TEXT,     "username",   N_("Username"),      FALSE, NULL,        NULL,         NULL, NULL },
    { REMMINA_PROTOCOL_SETTING_TYPE_PASSWORD, "password",   N_("User password"), FALSE, NULL,        NULL,         NULL, NULL },
    { REMMINA_PROTOCOL_SETTING_TYPE_SELECT,   "colordepth", N_("Colour depth"),  FALSE, colordepth_list, NULL,         NULL, NULL },
    { REMMINA_PROTOCOL_SETTING_TYPE_SELECT,   "quality",    N_("Quality"),       FALSE, quality_list,    NULL,         NULL, NULL },
    { REMMINA_PROTOCOL_SETTING_TYPE_KEYMAP,   "keymap", NULL,            FALSE, NULL,        NULL,         NULL, NULL },
    { REMMINA_PROTOCOL_SETTING_TYPE_END,      NULL,     NULL,            FALSE, NULL,        NULL,         NULL, NULL }
};
 
// Same as above.
static const RemminaProtocolSetting remmina_plugin_vnci_basic_settings[] =
{
    { REMMINA_PROTOCOL_SETTING_TYPE_TEXT,     "listenport", N_("Listen on port"), FALSE, NULL,        vnciport_tooltip, NULL, NULL},
    { REMMINA_PROTOCOL_SETTING_TYPE_TEXT,     "username",   N_("Username"),       FALSE, NULL,        NULL,     NULL, NULL},
    { REMMINA_PROTOCOL_SETTING_TYPE_PASSWORD, "password",   N_("User password"),  FALSE, NULL,        NULL,     NULL, NULL},
    { REMMINA_PROTOCOL_SETTING_TYPE_SELECT,   "colordepth", N_("Colour depth"),   FALSE, colordepth_list, NULL,     NULL, NULL},
    { REMMINA_PROTOCOL_SETTING_TYPE_SELECT,   "quality",    N_("Quality"),        FALSE, quality_list,    NULL,     NULL, NULL},
    { REMMINA_PROTOCOL_SETTING_TYPE_KEYMAP,   "keymap", NULL,             FALSE, NULL,        NULL,     NULL, NULL},
    { REMMINA_PROTOCOL_SETTING_TYPE_END,      NULL,     NULL,             FALSE, NULL,        NULL,     NULL, NULL}
};
 
/* Array of RemminaProtocolSetting for advanced settings.
 * Each item is composed by:
 * a) RemminaProtocolSettingType for setting type
 * b) Setting name
 * c) Setting description
 * d) Compact disposition
 * e) Values for REMMINA_PROTOCOL_SETTING_TYPE_SELECT or REMMINA_PROTOCOL_SETTING_TYPE_COMBO
 * f) Setting Tooltip
 */
static const RemminaProtocolSetting remmina_plugin_vnc_advanced_settings[] =
{
    { REMMINA_PROTOCOL_SETTING_TYPE_TEXT,  "encodings",      N_("Override pre-set VNC encodings"),          FALSE, NULL, vncencodings_tooltip },
    { REMMINA_PROTOCOL_SETTING_TYPE_TEXT,  "aspect_ratio",       N_("Dynamic resolution enforced aspec ratio"),         FALSE, NULL, aspect_ratio_tooltip },
    { REMMINA_PROTOCOL_SETTING_TYPE_CHECK, "tightencoding", N_("Force tight encoding"),         TRUE, NULL, N_("Enabling this may help when the remote desktop looks scrambled") },
    { REMMINA_PROTOCOL_SETTING_TYPE_CHECK, "disablesmoothscrolling", N_("Disable smooth scrolling"),        FALSE, NULL, NULL },
    { REMMINA_PROTOCOL_SETTING_TYPE_CHECK, "disablepasswordstoring", N_("Forget passwords after use"),      TRUE,  NULL, NULL },
    { REMMINA_PROTOCOL_SETTING_TYPE_CHECK, "disableserverbell",  N_("Ignore remote bell messages"),     FALSE, NULL, NULL },
    { REMMINA_PROTOCOL_SETTING_TYPE_CHECK, "disableserverinput",     N_("Prevent local interaction on the server"), TRUE,  NULL, NULL },
    { REMMINA_PROTOCOL_SETTING_TYPE_CHECK, "showcursor",         N_("Show remote cursor"),          FALSE,  NULL, NULL },
    { REMMINA_PROTOCOL_SETTING_TYPE_CHECK, "disableclipboard",   N_("Turn off clipboard sync"),         TRUE,  NULL, NULL },
    { REMMINA_PROTOCOL_SETTING_TYPE_CHECK, "disableencryption",  N_("Turn off encryption"),         FALSE, NULL, NULL },
    { REMMINA_PROTOCOL_SETTING_TYPE_CHECK, "viewonly",       N_("View only"),               TRUE, NULL, NULL },
    { REMMINA_PROTOCOL_SETTING_TYPE_END,   NULL,             NULL,                      FALSE, NULL, NULL }
};
 
/* Array for available features.
 * The last element of the array must be REMMINA_PROTOCOL_FEATURE_TYPE_END. */
static const RemminaProtocolFeature remmina_plugin_vnc_features[] =
{
    { REMMINA_PROTOCOL_FEATURE_TYPE_PREF,    REMMINA_PLUGIN_VNC_FEATURE_PREF_QUALITY,        GINT_TO_POINTER(REMMINA_PROTOCOL_FEATURE_PREF_RADIO), "quality",
      quality_list },
    { REMMINA_PROTOCOL_FEATURE_TYPE_PREF,    REMMINA_PLUGIN_VNC_FEATURE_PREF_COLOR,      GINT_TO_POINTER(REMMINA_PROTOCOL_FEATURE_PREF_RADIO), "colordepth",
      colordepth_list },
    { REMMINA_PROTOCOL_FEATURE_TYPE_PREF,    REMMINA_PLUGIN_VNC_FEATURE_PREF_VIEWONLY,       GINT_TO_POINTER(REMMINA_PROTOCOL_FEATURE_PREF_CHECK), "viewonly",
      N_("View only") },
    { REMMINA_PROTOCOL_FEATURE_TYPE_PREF,    REMMINA_PLUGIN_VNC_FEATURE_PREF_DISABLESERVERINPUT, GINT_TO_POINTER(REMMINA_PROTOCOL_FEATURE_PREF_CHECK), "disableserverinput",N_("Prevent local interaction on the server")  },
    { REMMINA_PROTOCOL_FEATURE_TYPE_TOOL,    REMMINA_PLUGIN_VNC_FEATURE_TOOL_REFRESH,        N_("Refresh"),                    NULL,        NULL                           },
    { REMMINA_PROTOCOL_FEATURE_TYPE_TOOL,    REMMINA_PLUGIN_VNC_FEATURE_TOOL_CHAT,           N_("Open Chat…"),                    "face-smile",    NULL                           },
    { REMMINA_PROTOCOL_FEATURE_TYPE_TOOL,    REMMINA_PLUGIN_VNC_FEATURE_TOOL_SENDCTRLALTDEL,     N_("Send Ctrl+Alt+Delete"),               NULL,        NULL                           },
    { REMMINA_PROTOCOL_FEATURE_TYPE_SCALE,   REMMINA_PLUGIN_VNC_FEATURE_SCALE,           NULL,                         NULL,        NULL                           },
    { REMMINA_PROTOCOL_FEATURE_TYPE_UNFOCUS, REMMINA_PLUGIN_VNC_FEATURE_UNFOCUS,             NULL,                         NULL,        NULL                           },
#if LIBVNCSERVER_CHECK_VERSION_VERSION(0, 9, 14)
    { REMMINA_PROTOCOL_FEATURE_TYPE_DYNRESUPDATE, REMMINA_PLUGIN_VNC_FEATURE_DYNRESUPDATE,         NULL,               NULL, NULL },
#endif  
    { REMMINA_PROTOCOL_FEATURE_TYPE_END,     0,                          NULL,                         NULL,        NULL                           }
};
 
/* Protocol plugin definition and features */
static RemminaProtocolPlugin remmina_plugin_vnc =
{
    REMMINA_PLUGIN_TYPE_PROTOCOL,                   // Type
    VNC_PLUGIN_NAME,                                // Name
    VNC_PLUGIN_DESCRIPTION,                         // Description
    GETTEXT_PACKAGE,                                // Translation domain
    VNC_PLUGIN_VERSION,                             // Version number
    VNC_PLUGIN_APPICON,                             // Icon for normal connection
    VNC_PLUGIN_SSH_APPICON,                         // Icon for SSH connection
    remmina_plugin_vnc_basic_settings,              // Array for basic settings
    remmina_plugin_vnc_advanced_settings,           // Array for advanced settings
    REMMINA_PROTOCOL_SSH_SETTING_TUNNEL,            // SSH settings type
    remmina_plugin_vnc_features,                    // Array for available features
    remmina_plugin_vnc_init,                        // Plugin initialization
    remmina_plugin_vnc_open_connection,             // Plugin open connection
    remmina_plugin_vnc_close_connection,            // Plugin close connection
    remmina_plugin_vnc_query_feature,               // Query for available features
    remmina_plugin_vnc_call_feature,                // Call a feature
    remmina_plugin_vnc_keystroke                    // Send a keystroke
};
 
/* Protocol plugin definition and features */
static RemminaProtocolPlugin remmina_plugin_vnci =
{
    REMMINA_PLUGIN_TYPE_PROTOCOL,                   // Type
    VNCI_PLUGIN_NAME,                               // Name
    VNCI_PLUGIN_DESCRIPTION,                        // Description
    GETTEXT_PACKAGE,                                // Translation domain
    VERSION,                                        // Version number
    VNCI_PLUGIN_APPICON,                            // Icon for normal connection
    VNCI_PLUGIN_SSH_APPICON,                        // Icon for SSH connection
    remmina_plugin_vnci_basic_settings,             // Array for basic settings
    remmina_plugin_vnc_advanced_settings,           // Array for advanced settings
    REMMINA_PROTOCOL_SSH_SETTING_REVERSE_TUNNEL,    // SSH settings type
    remmina_plugin_vnc_features,                    // Array for available features
    remmina_plugin_vnc_init,                        // Plugin initialization
    remmina_plugin_vnc_open_connection,             // Plugin open connection
    remmina_plugin_vnc_close_connection,            // Plugin close connection
    remmina_plugin_vnc_query_feature,               // Query for available features
    remmina_plugin_vnc_call_feature,                // Call a feature
    remmina_plugin_vnc_keystroke,                   // Send a keystroke
    NULL,                                           // No screenshot support available
    NULL,                                           // RCW map event
    NULL                                            // RCW unmap event
};
 
G_MODULE_EXPORT gboolean
remmina_plugin_entry(RemminaPluginService *service)
{
    TRACE_CALL(__func__);
    remmina_plugin_service = service;
 
    bindtextdomain(GETTEXT_PACKAGE, REMMINA_RUNTIME_LOCALEDIR);
    bind_textdomain_codeset(GETTEXT_PACKAGE, "UTF-8");
 
    if (!service->register_plugin((RemminaPlugin *)&remmina_plugin_vnc))
        return FALSE;
 
    if (!service->register_plugin((RemminaPlugin *)&remmina_plugin_vnci))
        return FALSE;
 
    return TRUE;
}