LXR qemu/ui/vnc-ws.c

   1/*
   2 * QEMU VNC display driver: Websockets support
   3 *
   4 * Copyright (C) 2010 Joel Martin
   5 * Copyright (C) 2012 Tim Hardeck
   6 *
   7 * This is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License as published by
   9 * the Free Software Foundation; either version 2 of the License, or
  10 * (at your option) any later version.
  11 *
  12 * This software is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this software; if not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21#include "qemu/osdep.h"
  22#include "qapi/error.h"
  23#include "vnc.h"
  24#include "io/channel-websock.h"
  25
  26static void vncws_tls_handshake_done(Object *source,
  27                                     Error *err,
  28                                     gpointer user_data)
  29{
  30    VncState *vs = user_data;
  31
  32    if (err) {
  33        VNC_DEBUG("Handshake failed %s\n", error_get_pretty(err));
  34        vnc_client_error(vs);
  35    } else {
  36        VNC_DEBUG("TLS handshake complete, starting websocket handshake\n");
  37        vs->ioc_tag = qio_channel_add_watch(
  38            QIO_CHANNEL(vs->ioc), G_IO_IN, vncws_handshake_io, vs, NULL);
  39    }
  40}
  41
  42
  43gboolean vncws_tls_handshake_io(QIOChannel *ioc G_GNUC_UNUSED,
  44                                GIOCondition condition G_GNUC_UNUSED,
  45                                void *opaque)
  46{
  47    VncState *vs = opaque;
  48    QIOChannelTLS *tls;
  49    Error *err = NULL;
  50
  51    VNC_DEBUG("TLS Websocket connection required\n");
  52    if (vs->ioc_tag) {
  53        g_source_remove(vs->ioc_tag);
  54        vs->ioc_tag = 0;
  55    }
  56
  57    tls = qio_channel_tls_new_server(
  58        vs->ioc,
  59        vs->vd->tlscreds,
  60        vs->vd->tlsaclname,
  61        &err);
  62    if (!tls) {
  63        VNC_DEBUG("Failed to setup TLS %s\n", error_get_pretty(err));
  64        error_free(err);
  65        vnc_client_error(vs);
  66        return TRUE;
  67    }
  68
  69    VNC_DEBUG("Start TLS WS handshake process\n");
  70    object_unref(OBJECT(vs->ioc));
  71    vs->ioc = QIO_CHANNEL(tls);
  72    vs->tls = qio_channel_tls_get_session(tls);
  73
  74    qio_channel_tls_handshake(tls,
  75                              vncws_tls_handshake_done,
  76                              vs,
  77                              NULL);
  78
  79    return TRUE;
  80}
  81
  82
  83static void vncws_handshake_done(Object *source,
  84                                 Error *err,
  85                                 gpointer user_data)
  86{
  87    VncState *vs = user_data;
  88
  89    if (err) {
  90        VNC_DEBUG("Websock handshake failed %s\n", error_get_pretty(err));
  91        vnc_client_error(vs);
  92    } else {
  93        VNC_DEBUG("Websock handshake complete, starting VNC protocol\n");
  94        vnc_init_state(vs);
  95        vs->ioc_tag = qio_channel_add_watch(
  96            vs->ioc, G_IO_IN, vnc_client_io, vs, NULL);
  97    }
  98}
  99
 100
 101gboolean vncws_handshake_io(QIOChannel *ioc G_GNUC_UNUSED,
 102                            GIOCondition condition G_GNUC_UNUSED,
 103                            void *opaque)
 104{
 105    VncState *vs = opaque;
 106    QIOChannelWebsock *wioc;
 107
 108    VNC_DEBUG("Websocket negotiate starting\n");
 109    if (vs->ioc_tag) {
 110        g_source_remove(vs->ioc_tag);
 111        vs->ioc_tag = 0;
 112    }
 113
 114    wioc = qio_channel_websock_new_server(vs->ioc);
 115
 116    object_unref(OBJECT(vs->ioc));
 117    vs->ioc = QIO_CHANNEL(wioc);
 118
 119    qio_channel_websock_handshake(wioc,
 120                                  vncws_handshake_done,
 121                                  vs,
 122                                  NULL);
 123
 124    return TRUE;
 125}
 126