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