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