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 #include "trace.h"
  27
  28 static void vncws_tls_handshake_done(QIOTask *task,
  29                                      gpointer user_data)
  30 {
  31     VncState *vs = user_data;
  32     Error *err = NULL;
  33
  34     if (qio_task_propagate_error(task, &err)) {
  35         VNC_DEBUG("Handshake failed %s\n", error_get_pretty(err));
  36         vnc_client_error(vs);
  37         error_free(err);
  38     } else {
  39         VNC_DEBUG("TLS handshake complete, starting websocket handshake\n");
  40         if (vs->ioc_tag) {
  41             g_source_remove(vs->ioc_tag);
  42         }
  43         vs->ioc_tag = qio_channel_add_watch(
  44             QIO_CHANNEL(vs->ioc), G_IO_IN, vncws_handshake_io, vs, NULL);
  45     }
  46 }
  47
  48
  49 gboolean vncws_tls_handshake_io(QIOChannel *ioc G_GNUC_UNUSED,
  50                                 GIOCondition condition G_GNUC_UNUSED,
  51                                 void *opaque)
  52 {
  53     VncState *vs = opaque;
  54     QIOChannelTLS *tls;
  55     Error *err = NULL;
  56
  57     if (vs->ioc_tag) {
  58         g_source_remove(vs->ioc_tag);
  59         vs->ioc_tag = 0;
  60     }
  61
  62     tls = qio_channel_tls_new_server(
  63         vs->ioc,
  64         vs->vd->tlscreds,
  65         vs->vd->tlsaclname,
  66         &err);
  67     if (!tls) {
  68         VNC_DEBUG("Failed to setup TLS %s\n", error_get_pretty(err));
  69         error_free(err);
  70         vnc_client_error(vs);
  71         return TRUE;
  72     }
  73
  74     qio_channel_set_name(QIO_CHANNEL(tls), "vnc-ws-server-tls");
  75
  76     object_unref(OBJECT(vs->ioc));
  77     vs->ioc = QIO_CHANNEL(tls);
  78     trace_vnc_client_io_wrap(vs, vs->ioc, "tls");
  79     vs->tls = qio_channel_tls_get_session(tls);
  80
  81     qio_channel_tls_handshake(tls,
  82                               vncws_tls_handshake_done,
  83                               vs,
  84                               NULL);
  85
  86     return TRUE;
  87 }
  88
  89
  90 static void vncws_handshake_done(QIOTask *task,
  91                                  gpointer user_data)
  92 {
  93     VncState *vs = user_data;
  94     Error *err = NULL;
  95
  96     if (qio_task_propagate_error(task, &err)) {
  97         VNC_DEBUG("Websock handshake failed %s\n", error_get_pretty(err));
  98         vnc_client_error(vs);
  99         error_free(err);
 100     } else {
 101         VNC_DEBUG("Websock handshake complete, starting VNC protocol\n");
 102         vnc_start_protocol(vs);
 103         if (vs->ioc_tag) {
 104             g_source_remove(vs->ioc_tag);
 105         }
 106         vs->ioc_tag = qio_channel_add_watch(
 107             vs->ioc, G_IO_IN, vnc_client_io, vs, NULL);
 108     }
 109 }
 110
 111
 112 gboolean vncws_handshake_io(QIOChannel *ioc G_GNUC_UNUSED,
 113                             GIOCondition condition G_GNUC_UNUSED,
 114                             void *opaque)
 115 {
 116     VncState *vs = opaque;
 117     QIOChannelWebsock *wioc;
 118
 119     if (vs->ioc_tag) {
 120         g_source_remove(vs->ioc_tag);
 121         vs->ioc_tag = 0;
 122     }
 123
 124     wioc = qio_channel_websock_new_server(vs->ioc);
 125     qio_channel_set_name(QIO_CHANNEL(wioc), "vnc-ws-server-websock");
 126
 127     object_unref(OBJECT(vs->ioc));
 128     vs->ioc = QIO_CHANNEL(wioc);
 129     trace_vnc_client_io_wrap(vs, vs->ioc, "websock");
 130
 131     qio_channel_websock_handshake(wioc,
 132                                   vncws_handshake_done,
 133                                   vs,
 134                                   NULL);
 135
 136     return TRUE;
 137 }