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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 | } |