xref: /openbmc/qemu/ui/vnc-ws.c (revision 0f74e61d)
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->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 
91 static 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 
113 gboolean 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