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 "vnc.h"
  23 #include "io/channel-websock.h"
  24
  25 static void vncws_tls_handshake_done(Object *source,
  26                                      Error *err,
  27                                      gpointer user_data)
  28 {
  29     VncState *vs = user_data;
  30
  31     if (err) {
  32         VNC_DEBUG("Handshake failed %s\n", error_get_pretty(err));
  33         vnc_client_error(vs);
  34     } else {
  35         VNC_DEBUG("TLS handshake complete, starting websocket handshake\n");
  36         vs->ioc_tag = qio_channel_add_watch(
  37             QIO_CHANNEL(vs->ioc), G_IO_IN, vncws_handshake_io, vs, NULL);
  38     }
  39 }
  40
  41
  42 gboolean vncws_tls_handshake_io(QIOChannel *ioc G_GNUC_UNUSED,
  43                                 GIOCondition condition G_GNUC_UNUSED,
  44                                 void *opaque)
  45 {
  46     VncState *vs = opaque;
  47     QIOChannelTLS *tls;
  48     Error *err = NULL;
  49
  50     VNC_DEBUG("TLS Websocket connection required\n");
  51     if (vs->ioc_tag) {
  52         g_source_remove(vs->ioc_tag);
  53         vs->ioc_tag = 0;
  54     }
  55
  56     tls = qio_channel_tls_new_server(
  57         vs->ioc,
  58         vs->vd->tlscreds,
  59         vs->vd->tlsaclname,
  60         &err);
  61     if (!tls) {
  62         VNC_DEBUG("Failed to setup TLS %s\n", error_get_pretty(err));
  63         error_free(err);
  64         vnc_client_error(vs);
  65         return TRUE;
  66     }
  67
  68     VNC_DEBUG("Start TLS WS handshake process\n");
  69     object_unref(OBJECT(vs->ioc));
  70     vs->ioc = QIO_CHANNEL(tls);
  71     vs->tls = qio_channel_tls_get_session(tls);
  72
  73     qio_channel_tls_handshake(tls,
  74                               vncws_tls_handshake_done,
  75                               vs,
  76                               NULL);
  77
  78     return TRUE;
  79 }
  80
  81
  82 static void vncws_handshake_done(Object *source,
  83                                  Error *err,
  84                                  gpointer user_data)
  85 {
  86     VncState *vs = user_data;
  87
  88     if (err) {
  89         VNC_DEBUG("Websock handshake failed %s\n", error_get_pretty(err));
  90         vnc_client_error(vs);
  91     } else {
  92         VNC_DEBUG("Websock handshake complete, starting VNC protocol\n");
  93         vnc_init_state(vs);
  94         vs->ioc_tag = qio_channel_add_watch(
  95             vs->ioc, G_IO_IN, vnc_client_io, vs, NULL);
  96     }
  97 }
  98
  99
 100 gboolean vncws_handshake_io(QIOChannel *ioc G_GNUC_UNUSED,
 101                             GIOCondition condition G_GNUC_UNUSED,
 102                             void *opaque)
 103 {
 104     VncState *vs = opaque;
 105     QIOChannelWebsock *wioc;
 106
 107     VNC_DEBUG("Websocket negotiate starting\n");
 108     if (vs->ioc_tag) {
 109         g_source_remove(vs->ioc_tag);
 110         vs->ioc_tag = 0;
 111     }
 112
 113     wioc = qio_channel_websock_new_server(vs->ioc);
 114
 115     object_unref(OBJECT(vs->ioc));
 116     vs->ioc = QIO_CHANNEL(wioc);
 117
 118     qio_channel_websock_handshake(wioc,
 119                                   vncws_handshake_done,
 120                                   vs,
 121                                   NULL);
 122
 123     return TRUE;
 124 }