xref: /openbmc/qemu/ui/vnc-ws.c (revision 80e5db30)
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 
27 static void vncws_tls_handshake_done(QIOTask *task,
28                                      gpointer user_data)
29 {
30     VncState *vs = user_data;
31     Error *err = NULL;
32 
33     if (qio_task_propagate_error(task, &err)) {
34         VNC_DEBUG("Handshake failed %s\n", error_get_pretty(err));
35         vnc_client_error(vs);
36         error_free(err);
37     } else {
38         VNC_DEBUG("TLS handshake complete, starting websocket handshake\n");
39         vs->ioc_tag = qio_channel_add_watch(
40             QIO_CHANNEL(vs->ioc), G_IO_IN, vncws_handshake_io, vs, NULL);
41     }
42 }
43 
44 
45 gboolean vncws_tls_handshake_io(QIOChannel *ioc G_GNUC_UNUSED,
46                                 GIOCondition condition G_GNUC_UNUSED,
47                                 void *opaque)
48 {
49     VncState *vs = opaque;
50     QIOChannelTLS *tls;
51     Error *err = NULL;
52 
53     VNC_DEBUG("TLS Websocket connection required\n");
54     if (vs->ioc_tag) {
55         g_source_remove(vs->ioc_tag);
56         vs->ioc_tag = 0;
57     }
58 
59     tls = qio_channel_tls_new_server(
60         vs->ioc,
61         vs->vd->tlscreds,
62         vs->vd->tlsaclname,
63         &err);
64     if (!tls) {
65         VNC_DEBUG("Failed to setup TLS %s\n", error_get_pretty(err));
66         error_free(err);
67         vnc_client_error(vs);
68         return TRUE;
69     }
70 
71     qio_channel_set_name(QIO_CHANNEL(tls), "vnc-ws-server-tls");
72 
73     VNC_DEBUG("Start TLS WS handshake process\n");
74     object_unref(OBJECT(vs->ioc));
75     vs->ioc = QIO_CHANNEL(tls);
76     vs->tls = qio_channel_tls_get_session(tls);
77 
78     qio_channel_tls_handshake(tls,
79                               vncws_tls_handshake_done,
80                               vs,
81                               NULL);
82 
83     return TRUE;
84 }
85 
86 
87 static void vncws_handshake_done(QIOTask *task,
88                                  gpointer user_data)
89 {
90     VncState *vs = user_data;
91     Error *err = NULL;
92 
93     if (qio_task_propagate_error(task, &err)) {
94         VNC_DEBUG("Websock handshake failed %s\n", error_get_pretty(err));
95         vnc_client_error(vs);
96         error_free(err);
97     } else {
98         VNC_DEBUG("Websock handshake complete, starting VNC protocol\n");
99         vnc_start_protocol(vs);
100         vs->ioc_tag = qio_channel_add_watch(
101             vs->ioc, G_IO_IN, vnc_client_io, vs, NULL);
102     }
103 }
104 
105 
106 gboolean vncws_handshake_io(QIOChannel *ioc G_GNUC_UNUSED,
107                             GIOCondition condition G_GNUC_UNUSED,
108                             void *opaque)
109 {
110     VncState *vs = opaque;
111     QIOChannelWebsock *wioc;
112 
113     VNC_DEBUG("Websocket negotiate starting\n");
114     if (vs->ioc_tag) {
115         g_source_remove(vs->ioc_tag);
116         vs->ioc_tag = 0;
117     }
118 
119     wioc = qio_channel_websock_new_server(vs->ioc);
120     qio_channel_set_name(QIO_CHANNEL(wioc), "vnc-ws-server-websock");
121 
122     object_unref(OBJECT(vs->ioc));
123     vs->ioc = QIO_CHANNEL(wioc);
124 
125     qio_channel_websock_handshake(wioc,
126                                   vncws_handshake_done,
127                                   vs,
128                                   NULL);
129 
130     return TRUE;
131 }
132