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 | G_IO_HUP | G_IO_ERR,
  45            vncws_handshake_io, vs, NULL);
  46    }
  47}
  48
  49
  50gboolean vncws_tls_handshake_io(QIOChannel *ioc G_GNUC_UNUSED,
  51                                GIOCondition condition,
  52                                void *opaque)
  53{
  54    VncState *vs = opaque;
  55    QIOChannelTLS *tls;
  56    Error *err = NULL;
  57
  58    if (vs->ioc_tag) {
  59        g_source_remove(vs->ioc_tag);
  60        vs->ioc_tag = 0;
  61    }
  62
  63    if (condition & (G_IO_HUP | G_IO_ERR)) {
  64        vnc_client_error(vs);
  65        return TRUE;
  66    }
  67
  68    tls = qio_channel_tls_new_server(
  69        vs->ioc,
  70        vs->vd->tlscreds,
  71        vs->vd->tlsauthzid,
  72        &err);
  73    if (!tls) {
  74        VNC_DEBUG("Failed to setup TLS %s\n", error_get_pretty(err));
  75        error_free(err);
  76        vnc_client_error(vs);
  77        return TRUE;
  78    }
  79
  80    qio_channel_set_name(QIO_CHANNEL(tls), "vnc-ws-server-tls");
  81
  82    object_unref(OBJECT(vs->ioc));
  83    vs->ioc = QIO_CHANNEL(tls);
  84    trace_vnc_client_io_wrap(vs, vs->ioc, "tls");
  85    vs->tls = qio_channel_tls_get_session(tls);
  86
  87    qio_channel_tls_handshake(tls,
  88                              vncws_tls_handshake_done,
  89                              vs,
  90                              NULL,
  91                              NULL);
  92
  93    return TRUE;
  94}
  95
  96
  97static void vncws_handshake_done(QIOTask *task,
  98                                 gpointer user_data)
  99{
 100    VncState *vs = user_data;
 101    Error *err = NULL;
 102
 103    if (qio_task_propagate_error(task, &err)) {
 104        VNC_DEBUG("Websock handshake failed %s\n", error_get_pretty(err));
 105        vnc_client_error(vs);
 106        error_free(err);
 107    } else {
 108        VNC_DEBUG("Websock handshake complete, starting VNC protocol\n");
 109        vnc_start_protocol(vs);
 110        if (vs->ioc_tag) {
 111            g_source_remove(vs->ioc_tag);
 112        }
 113        vs->ioc_tag = qio_channel_add_watch(
 114            vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR,
 115            vnc_client_io, vs, NULL);
 116    }
 117}
 118
 119
 120gboolean vncws_handshake_io(QIOChannel *ioc G_GNUC_UNUSED,
 121                            GIOCondition condition,
 122                            void *opaque)
 123{
 124    VncState *vs = opaque;
 125    QIOChannelWebsock *wioc;
 126
 127    if (vs->ioc_tag) {
 128        g_source_remove(vs->ioc_tag);
 129        vs->ioc_tag = 0;
 130    }
 131
 132    if (condition & (G_IO_HUP | G_IO_ERR)) {
 133        vnc_client_error(vs);
 134        return TRUE;
 135    }
 136
 137    wioc = qio_channel_websock_new_server(vs->ioc);
 138    qio_channel_set_name(QIO_CHANNEL(wioc), "vnc-ws-server-websock");
 139
 140    object_unref(OBJECT(vs->ioc));
 141    vs->ioc = QIO_CHANNEL(wioc);
 142    trace_vnc_client_io_wrap(vs, vs->ioc, "websock");
 143
 144    qio_channel_websock_handshake(wioc,
 145                                  vncws_handshake_done,
 146                                  vs,
 147                                  NULL);
 148
 149    return TRUE;
 150}
 151