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->tlsaclname, 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