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(vs->ioc,
  44                                             G_IO_IN | G_IO_HUP | G_IO_ERR,
  45                                             vncws_handshake_io, vs, NULL);
  46     }
  47 }
  48
  49
  50 gboolean 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
  97 static 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
 120 gboolean 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 }