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
  26 static 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
  43 gboolean 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
  83 static 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
 101 gboolean 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 }