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 "vnc.h" 23 #include "io/channel-websock.h" 24 25 static void vncws_tls_handshake_done(Object *source, 26 Error *err, 27 gpointer user_data) 28 { 29 VncState *vs = user_data; 30 31 if (err) { 32 VNC_DEBUG("Handshake failed %s\n", error_get_pretty(err)); 33 vnc_client_error(vs); 34 } else { 35 VNC_DEBUG("TLS handshake complete, starting websocket handshake\n"); 36 vs->ioc_tag = qio_channel_add_watch( 37 QIO_CHANNEL(vs->ioc), G_IO_IN, vncws_handshake_io, vs, NULL); 38 } 39 } 40 41 42 gboolean vncws_tls_handshake_io(QIOChannel *ioc G_GNUC_UNUSED, 43 GIOCondition condition G_GNUC_UNUSED, 44 void *opaque) 45 { 46 VncState *vs = opaque; 47 QIOChannelTLS *tls; 48 Error *err = NULL; 49 50 VNC_DEBUG("TLS Websocket connection required\n"); 51 if (vs->ioc_tag) { 52 g_source_remove(vs->ioc_tag); 53 vs->ioc_tag = 0; 54 } 55 56 tls = qio_channel_tls_new_server( 57 vs->ioc, 58 vs->vd->tlscreds, 59 vs->vd->tlsaclname, 60 &err); 61 if (!tls) { 62 VNC_DEBUG("Failed to setup TLS %s\n", error_get_pretty(err)); 63 error_free(err); 64 vnc_client_error(vs); 65 return TRUE; 66 } 67 68 VNC_DEBUG("Start TLS WS handshake process\n"); 69 object_unref(OBJECT(vs->ioc)); 70 vs->ioc = QIO_CHANNEL(tls); 71 vs->tls = qio_channel_tls_get_session(tls); 72 73 qio_channel_tls_handshake(tls, 74 vncws_tls_handshake_done, 75 vs, 76 NULL); 77 78 return TRUE; 79 } 80 81 82 static void vncws_handshake_done(Object *source, 83 Error *err, 84 gpointer user_data) 85 { 86 VncState *vs = user_data; 87 88 if (err) { 89 VNC_DEBUG("Websock handshake failed %s\n", error_get_pretty(err)); 90 vnc_client_error(vs); 91 } else { 92 VNC_DEBUG("Websock handshake complete, starting VNC protocol\n"); 93 vnc_init_state(vs); 94 vs->ioc_tag = qio_channel_add_watch( 95 vs->ioc, G_IO_IN, vnc_client_io, vs, NULL); 96 } 97 } 98 99 100 gboolean vncws_handshake_io(QIOChannel *ioc G_GNUC_UNUSED, 101 GIOCondition condition G_GNUC_UNUSED, 102 void *opaque) 103 { 104 VncState *vs = opaque; 105 QIOChannelWebsock *wioc; 106 107 VNC_DEBUG("Websocket negotiate starting\n"); 108 if (vs->ioc_tag) { 109 g_source_remove(vs->ioc_tag); 110 vs->ioc_tag = 0; 111 } 112 113 wioc = qio_channel_websock_new_server(vs->ioc); 114 115 object_unref(OBJECT(vs->ioc)); 116 vs->ioc = QIO_CHANNEL(wioc); 117 118 qio_channel_websock_handshake(wioc, 119 vncws_handshake_done, 120 vs, 121 NULL); 122 123 return TRUE; 124 } 125