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#include "qemu/bswap.h"
  26
  27static void vncws_tls_handshake_done(QIOTask *task,
  28                                     gpointer user_data)
  29{
  30    VncState *vs = user_data;
  31    Error *err = NULL;
  32
  33    if (qio_task_propagate_error(task, &err)) {
  34        VNC_DEBUG("Handshake failed %s\n", error_get_pretty(err));
  35        vnc_client_error(vs);
  36        error_free(err);
  37    } else {
  38        VNC_DEBUG("TLS handshake complete, starting websocket handshake\n");
  39        vs->ioc_tag = qio_channel_add_watch(
  40            QIO_CHANNEL(vs->ioc), G_IO_IN, vncws_handshake_io, vs, NULL);
  41    }
  42}
  43
  44
  45gboolean vncws_tls_handshake_io(QIOChannel *ioc G_GNUC_UNUSED,
  46                                GIOCondition condition G_GNUC_UNUSED,
  47                                void *opaque)
  48{
  49    VncState *vs = opaque;
  50    QIOChannelTLS *tls;
  51    Error *err = NULL;
  52
  53    VNC_DEBUG("TLS Websocket connection required\n");
  54    if (vs->ioc_tag) {
  55        g_source_remove(vs->ioc_tag);
  56        vs->ioc_tag = 0;
  57    }
  58
  59    tls = qio_channel_tls_new_server(
  60        vs->ioc,
  61        vs->vd->tlscreds,
  62        vs->vd->tlsaclname,
  63        &err);
  64    if (!tls) {
  65        VNC_DEBUG("Failed to setup TLS %s\n", error_get_pretty(err));
  66        error_free(err);
  67        vnc_client_error(vs);
  68        return TRUE;
  69    }
  70
  71    qio_channel_set_name(QIO_CHANNEL(tls), "vnc-ws-server-tls");
  72
  73    VNC_DEBUG("Start TLS WS handshake process\n");
  74    object_unref(OBJECT(vs->ioc));
  75    vs->ioc = QIO_CHANNEL(tls);
  76    vs->tls = qio_channel_tls_get_session(tls);
  77
  78    qio_channel_tls_handshake(tls,
  79                              vncws_tls_handshake_done,
  80                              vs,
  81                              NULL);
  82
  83    return TRUE;
  84}
  85
  86
  87static void vncws_handshake_done(QIOTask *task,
  88                                 gpointer user_data)
  89{
  90    VncState *vs = user_data;
  91    Error *err = NULL;
  92
  93    if (qio_task_propagate_error(task, &err)) {
  94        VNC_DEBUG("Websock handshake failed %s\n", error_get_pretty(err));
  95        vnc_client_error(vs);
  96        error_free(err);
  97    } else {
  98        VNC_DEBUG("Websock handshake complete, starting VNC protocol\n");
  99        vnc_start_protocol(vs);
 100        vs->ioc_tag = qio_channel_add_watch(
 101            vs->ioc, G_IO_IN, vnc_client_io, vs, NULL);
 102    }
 103}
 104
 105
 106gboolean vncws_handshake_io(QIOChannel *ioc G_GNUC_UNUSED,
 107                            GIOCondition condition G_GNUC_UNUSED,
 108                            void *opaque)
 109{
 110    VncState *vs = opaque;
 111    QIOChannelWebsock *wioc;
 112
 113    VNC_DEBUG("Websocket negotiate starting\n");
 114    if (vs->ioc_tag) {
 115        g_source_remove(vs->ioc_tag);
 116        vs->ioc_tag = 0;
 117    }
 118
 119    wioc = qio_channel_websock_new_server(vs->ioc);
 120    qio_channel_set_name(QIO_CHANNEL(wioc), "vnc-ws-server-websock");
 121
 122    object_unref(OBJECT(vs->ioc));
 123    vs->ioc = QIO_CHANNEL(wioc);
 124
 125    qio_channel_websock_handshake(wioc,
 126                                  vncws_handshake_done,
 127                                  vs,
 128                                  NULL);
 129
 130    return TRUE;
 131}
 132