LXR qemu/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
  28static 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
  49gboolean 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->tlsauthzid,
  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                              NULL);
  86
  87    return TRUE;
  88}
  89
  90
  91static void vncws_handshake_done(QIOTask *task,
  92                                 gpointer user_data)
  93{
  94    VncState *vs = user_data;
  95    Error *err = NULL;
  96
  97    if (qio_task_propagate_error(task, &err)) {
  98        VNC_DEBUG("Websock handshake failed %s\n", error_get_pretty(err));
  99        vnc_client_error(vs);
 100        error_free(err);
 101    } else {
 102        VNC_DEBUG("Websock handshake complete, starting VNC protocol\n");
 103        vnc_start_protocol(vs);
 104        if (vs->ioc_tag) {
 105            g_source_remove(vs->ioc_tag);
 106        }
 107        vs->ioc_tag = qio_channel_add_watch(
 108            vs->ioc, G_IO_IN, vnc_client_io, vs, NULL);
 109    }
 110}
 111
 112
 113gboolean vncws_handshake_io(QIOChannel *ioc G_GNUC_UNUSED,
 114                            GIOCondition condition G_GNUC_UNUSED,
 115                            void *opaque)
 116{
 117    VncState *vs = opaque;
 118    QIOChannelWebsock *wioc;
 119
 120    if (vs->ioc_tag) {
 121        g_source_remove(vs->ioc_tag);
 122        vs->ioc_tag = 0;
 123    }
 124
 125    wioc = qio_channel_websock_new_server(vs->ioc);
 126    qio_channel_set_name(QIO_CHANNEL(wioc), "vnc-ws-server-websock");
 127
 128    object_unref(OBJECT(vs->ioc));
 129    vs->ioc = QIO_CHANNEL(wioc);
 130    trace_vnc_client_io_wrap(vs, vs->ioc, "websock");
 131
 132    qio_channel_websock_handshake(wioc,
 133                                  vncws_handshake_done,
 134                                  vs,
 135                                  NULL);
 136
 137    return TRUE;
 138}
 139