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
  27 static 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
  44 gboolean 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     VNC_DEBUG("Start TLS WS handshake process\n");
  71     object_unref(OBJECT(vs->ioc));
  72     vs->ioc = QIO_CHANNEL(tls);
  73     vs->tls = qio_channel_tls_get_session(tls);
  74
  75     qio_channel_tls_handshake(tls,
  76                               vncws_tls_handshake_done,
  77                               vs,
  78                               NULL);
  79
  80     return TRUE;
  81 }
  82
  83
  84 static void vncws_handshake_done(Object *source,
  85                                  Error *err,
  86                                  gpointer user_data)
  87 {
  88     VncState *vs = user_data;
  89
  90     if (err) {
  91         VNC_DEBUG("Websock handshake failed %s\n", error_get_pretty(err));
  92         vnc_client_error(vs);
  93     } else {
  94         VNC_DEBUG("Websock handshake complete, starting VNC protocol\n");
  95         vnc_init_state(vs);
  96         vs->ioc_tag = qio_channel_add_watch(
  97             vs->ioc, G_IO_IN, vnc_client_io, vs, NULL);
  98     }
  99 }
 100
 101
 102 gboolean vncws_handshake_io(QIOChannel *ioc G_GNUC_UNUSED,
 103                             GIOCondition condition G_GNUC_UNUSED,
 104                             void *opaque)
 105 {
 106     VncState *vs = opaque;
 107     QIOChannelWebsock *wioc;
 108
 109     VNC_DEBUG("Websocket negotiate starting\n");
 110     if (vs->ioc_tag) {
 111         g_source_remove(vs->ioc_tag);
 112         vs->ioc_tag = 0;
 113     }
 114
 115     wioc = qio_channel_websock_new_server(vs->ioc);
 116
 117     object_unref(OBJECT(vs->ioc));
 118     vs->ioc = QIO_CHANNEL(wioc);
 119
 120     qio_channel_websock_handshake(wioc,
 121                                   vncws_handshake_done,
 122                                   vs,
 123                                   NULL);
 124
 125     return TRUE;
 126 }