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(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
  45 gboolean 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
  87 static 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
 106 gboolean 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 }