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 "vnc.h"
  22 #include "io/channel-websock.h"
  23
  24 static void vncws_tls_handshake_done(Object *source,
  25                                      Error *err,
  26                                      gpointer user_data)
  27 {
  28     VncState *vs = user_data;
  29
  30     if (err) {
  31         VNC_DEBUG("Handshake failed %s\n", error_get_pretty(err));
  32         vnc_client_error(vs);
  33     } else {
  34         VNC_DEBUG("TLS handshake complete, starting websocket handshake\n");
  35         vs->ioc_tag = qio_channel_add_watch(
  36             QIO_CHANNEL(vs->ioc), G_IO_IN, vncws_handshake_io, vs, NULL);
  37     }
  38 }
  39
  40
  41 gboolean vncws_tls_handshake_io(QIOChannel *ioc G_GNUC_UNUSED,
  42                                 GIOCondition condition G_GNUC_UNUSED,
  43                                 void *opaque)
  44 {
  45     VncState *vs = opaque;
  46     QIOChannelTLS *tls;
  47     Error *err = NULL;
  48
  49     VNC_DEBUG("TLS Websocket connection required\n");
  50     if (vs->ioc_tag) {
  51         g_source_remove(vs->ioc_tag);
  52         vs->ioc_tag = 0;
  53     }
  54
  55     tls = qio_channel_tls_new_server(
  56         vs->ioc,
  57         vs->vd->tlscreds,
  58         vs->vd->tlsaclname,
  59         &err);
  60     if (!tls) {
  61         VNC_DEBUG("Failed to setup TLS %s\n", error_get_pretty(err));
  62         error_free(err);
  63         vnc_client_error(vs);
  64         return TRUE;
  65     }
  66
  67     VNC_DEBUG("Start TLS WS handshake process\n");
  68     object_unref(OBJECT(vs->ioc));
  69     vs->ioc = QIO_CHANNEL(tls);
  70     vs->tls = qio_channel_tls_get_session(tls);
  71
  72     qio_channel_tls_handshake(tls,
  73                               vncws_tls_handshake_done,
  74                               vs,
  75                               NULL);
  76
  77     return TRUE;
  78 }
  79
  80
  81 static void vncws_handshake_done(Object *source,
  82                                  Error *err,
  83                                  gpointer user_data)
  84 {
  85     VncState *vs = user_data;
  86
  87     if (err) {
  88         VNC_DEBUG("Websock handshake failed %s\n", error_get_pretty(err));
  89         vnc_client_error(vs);
  90     } else {
  91         VNC_DEBUG("Websock handshake complete, starting VNC protocol\n");
  92         vnc_init_state(vs);
  93         vs->ioc_tag = qio_channel_add_watch(
  94             vs->ioc, G_IO_IN, vnc_client_io, vs, NULL);
  95     }
  96 }
  97
  98
  99 gboolean vncws_handshake_io(QIOChannel *ioc G_GNUC_UNUSED,
 100                             GIOCondition condition G_GNUC_UNUSED,
 101                             void *opaque)
 102 {
 103     VncState *vs = opaque;
 104     QIOChannelWebsock *wioc;
 105
 106     VNC_DEBUG("Websocket negotiate starting\n");
 107     if (vs->ioc_tag) {
 108         g_source_remove(vs->ioc_tag);
 109         vs->ioc_tag = 0;
 110     }
 111
 112     wioc = qio_channel_websock_new_server(vs->ioc);
 113
 114     object_unref(OBJECT(vs->ioc));
 115     vs->ioc = QIO_CHANNEL(wioc);
 116
 117     qio_channel_websock_handshake(wioc,
 118                                   vncws_handshake_done,
 119                                   vs,
 120                                   NULL);
 121
 122     return TRUE;
 123 }