/* * QEMU VNC display driver * * Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws> * Copyright (C) 2006 Fabrice Bellard * Copyright (C) 2009 Red Hat, Inc * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "qemu/osdep.h" #include "vnc.h" #include "vnc-jobs.h" #include "trace.h" #include "hw/qdev.h" #include "sysemu/sysemu.h" #include "qemu/error-report.h" #include "qemu/sockets.h" #include "qemu/timer.h" #include "qemu/acl.h" #include "qemu/config-file.h" #include "qapi/qmp/qerror.h" #include "qapi/qmp/types.h" #include "qmp-commands.h" #include "ui/input.h" #include "qapi-event.h" #include "crypto/hash.h" #include "crypto/tlscredsanon.h" #include "crypto/tlscredsx509.h" #include "qom/object_interfaces.h" #include "qemu/cutils.h" #include "io/dns-resolver.h" #define VNC_REFRESH_INTERVAL_BASE GUI_REFRESH_INTERVAL_DEFAULT #define VNC_REFRESH_INTERVAL_INC 50 #define VNC_REFRESH_INTERVAL_MAX GUI_REFRESH_INTERVAL_IDLE static const struct timeval VNC_REFRESH_STATS = { 0, 500000 }; static const struct timeval VNC_REFRESH_LOSSY = { 2, 0 }; #include "vnc_keysym.h" #include "crypto/cipher.h" static QTAILQ_HEAD(, VncDisplay) vnc_displays = QTAILQ_HEAD_INITIALIZER(vnc_displays); static int vnc_cursor_define(VncState *vs); static void vnc_release_modifiers(VncState *vs); static void vnc_set_share_mode(VncState *vs, VncShareMode mode) { #ifdef _VNC_DEBUG static const char *mn[] = { [0] = "undefined", [VNC_SHARE_MODE_CONNECTING] = "connecting", [VNC_SHARE_MODE_SHARED] = "shared", [VNC_SHARE_MODE_EXCLUSIVE] = "exclusive", [VNC_SHARE_MODE_DISCONNECTED] = "disconnected", }; fprintf(stderr, "%s/%p: %s -> %s\n", __func__, vs->ioc, mn[vs->share_mode], mn[mode]); #endif switch (vs->share_mode) { case VNC_SHARE_MODE_CONNECTING: vs->vd->num_connecting--; break; case VNC_SHARE_MODE_SHARED: vs->vd->num_shared--; break; case VNC_SHARE_MODE_EXCLUSIVE: vs->vd->num_exclusive--; break; default: break; } vs->share_mode = mode; switch (vs->share_mode) { case VNC_SHARE_MODE_CONNECTING: vs->vd->num_connecting++; break; case VNC_SHARE_MODE_SHARED: vs->vd->num_shared++; break; case VNC_SHARE_MODE_EXCLUSIVE: vs->vd->num_exclusive++; break; default: break; } } static void vnc_init_basic_info(SocketAddress *addr, VncBasicInfo *info, Error **errp) { switch (addr->type) { case SOCKET_ADDRESS_KIND_INET: info->host = g_strdup(addr->u.inet.data->host); info->service = g_strdup(addr->u.inet.data->port); if (addr->u.inet.data->ipv6) { info->family = NETWORK_ADDRESS_FAMILY_IPV6; } else { info->family = NETWORK_ADDRESS_FAMILY_IPV4; } break; case SOCKET_ADDRESS_KIND_UNIX: info->host = g_strdup(""); info->service = g_strdup(addr->u.q_unix.data->path); info->family = NETWORK_ADDRESS_FAMILY_UNIX; break; default: error_setg(errp, "Unsupported socket kind %d", addr->type); break; } return; } static void vnc_init_basic_info_from_server_addr(QIOChannelSocket *ioc, VncBasicInfo *info, Error **errp) { SocketAddress *addr = NULL; if (!ioc) { error_setg(errp, "No listener socket available"); return; } addr = qio_channel_socket_get_local_address(ioc, errp); if (!addr) { return; } vnc_init_basic_info(addr, info, errp); qapi_free_SocketAddress(addr); } static void vnc_init_basic_info_from_remote_addr(QIOChannelSocket *ioc, VncBasicInfo *info, Error **errp) { SocketAddress *addr = NULL; addr = qio_channel_socket_get_remote_address(ioc, errp); if (!addr) { return; } vnc_init_basic_info(addr, info, errp); qapi_free_SocketAddress(addr); } static const char *vnc_auth_name(VncDisplay *vd) { switch (vd->auth) { case VNC_AUTH_INVALID: return "invalid"; case VNC_AUTH_NONE: return "none"; case VNC_AUTH_VNC: return "vnc"; case VNC_AUTH_RA2: return "ra2"; case VNC_AUTH_RA2NE: return "ra2ne"; case VNC_AUTH_TIGHT: return "tight"; case VNC_AUTH_ULTRA: return "ultra"; case VNC_AUTH_TLS: return "tls"; case VNC_AUTH_VENCRYPT: switch (vd->subauth) { case VNC_AUTH_VENCRYPT_PLAIN: return "vencrypt+plain"; case VNC_AUTH_VENCRYPT_TLSNONE: return "vencrypt+tls+none"; case VNC_AUTH_VENCRYPT_TLSVNC: return "vencrypt+tls+vnc"; case VNC_AUTH_VENCRYPT_TLSPLAIN: return "vencrypt+tls+plain"; case VNC_AUTH_VENCRYPT_X509NONE: return "vencrypt+x509+none"; case VNC_AUTH_VENCRYPT_X509VNC: return "vencrypt+x509+vnc"; case VNC_AUTH_VENCRYPT_X509PLAIN: return "vencrypt+x509+plain"; case VNC_AUTH_VENCRYPT_TLSSASL: return "vencrypt+tls+sasl"; case VNC_AUTH_VENCRYPT_X509SASL: return "vencrypt+x509+sasl"; default: return "vencrypt"; } case VNC_AUTH_SASL: return "sasl"; } return "unknown"; } static VncServerInfo *vnc_server_info_get(VncDisplay *vd) { VncServerInfo *info; Error *err = NULL; if (!vd->nlsock) { return NULL; } info = g_malloc0(sizeof(*info)); vnc_init_basic_info_from_server_addr(vd->lsock[0], qapi_VncServerInfo_base(info), &err); info->has_auth = true; info->auth = g_strdup(vnc_auth_name(vd)); if (err) { qapi_free_VncServerInfo(info); info = NULL; error_free(err); } return info; } static void vnc_client_cache_auth(VncState *client) { if (!client->info) { return; } if (client->tls) { client->info->x509_dname = qcrypto_tls_session_get_peer_name(client->tls); client->info->has_x509_dname = client->info->x509_dname != NULL; } #ifdef CONFIG_VNC_SASL if (client->sasl.conn && client->sasl.username) { client->info->has_sasl_username = true; client->info->sasl_username = g_strdup(client->sasl.username); } #endif } static void vnc_client_cache_addr(VncState *client) { Error *err = NULL; client->info = g_malloc0(sizeof(*client->info)); vnc_init_basic_info_from_remote_addr(client->sioc, qapi_VncClientInfo_base(client->info), &err); if (err) { qapi_free_VncClientInfo(client->info); client->info = NULL; error_free(err); } } static void vnc_qmp_event(VncState *vs, QAPIEvent event) { VncServerInfo *si; if (!vs->info) { return; } si = vnc_server_info_get(vs->vd); if (!si) { return; } switch (event) { case QAPI_EVENT_VNC_CONNECTED: qapi_event_send_vnc_connected(si, qapi_VncClientInfo_base(vs->info), &error_abort); break; case QAPI_EVENT_VNC_INITIALIZED: qapi_event_send_vnc_initialized(si, vs->info, &error_abort); break; case QAPI_EVENT_VNC_DISCONNECTED: qapi_event_send_vnc_disconnected(si, vs->info, &error_abort); break; default: break; } qapi_free_VncServerInfo(si); } static VncClientInfo *qmp_query_vnc_client(const VncState *client) { VncClientInfo *info; Error *err = NULL; info = g_malloc0(sizeof(*info)); vnc_init_basic_info_from_remote_addr(client->sioc, qapi_VncClientInfo_base(info), &err); if (err) { error_free(err); qapi_free_VncClientInfo(info); return NULL; } info->websocket = client->websocket; if (client->tls) { info->x509_dname = qcrypto_tls_session_get_peer_name(client->tls); info->has_x509_dname = info->x509_dname != NULL; } #ifdef CONFIG_VNC_SASL if (client->sasl.conn && client->sasl.username) { info->has_sasl_username = true; info->sasl_username = g_strdup(client->sasl.username); } #endif return info; } static VncDisplay *vnc_display_find(const char *id) { VncDisplay *vd; if (id == NULL) { return QTAILQ_FIRST(&vnc_displays); } QTAILQ_FOREACH(vd, &vnc_displays, next) { if (strcmp(id, vd->id) == 0) { return vd; } } return NULL; } static VncClientInfoList *qmp_query_client_list(VncDisplay *vd) { VncClientInfoList *cinfo, *prev = NULL; VncState *client; QTAILQ_FOREACH(client, &vd->clients, next) { cinfo = g_new0(VncClientInfoList, 1); cinfo->value = qmp_query_vnc_client(client); cinfo->next = prev; prev = cinfo; } return prev; } VncInfo *qmp_query_vnc(Error **errp) { VncInfo *info = g_malloc0(sizeof(*info)); VncDisplay *vd = vnc_display_find(NULL); SocketAddress *addr = NULL; if (vd == NULL || !vd->nlsock) { info->enabled = false; } else { info->enabled = true; /* for compatibility with the original command */ info->has_clients = true; info->clients = qmp_query_client_list(vd); if (vd->lsock == NULL) { return info; } addr = qio_channel_socket_get_local_address(vd->lsock[0], errp); if (!addr) { goto out_error; } switch (addr->type) { case SOCKET_ADDRESS_KIND_INET: info->host = g_strdup(addr->u.inet.data->host); info->service = g_strdup(addr->u.inet.data->port); if (addr->u.inet.data->ipv6) { info->family = NETWORK_ADDRESS_FAMILY_IPV6; } else { info->family = NETWORK_ADDRESS_FAMILY_IPV4; } break; case SOCKET_ADDRESS_KIND_UNIX: info->host = g_strdup(""); info->service = g_strdup(addr->u.q_unix.data->path); info->family = NETWORK_ADDRESS_FAMILY_UNIX; break; default: error_setg(errp, "Unsupported socket kind %d", addr->type); goto out_error; } info->has_host = true; info->has_service = true; info->has_family = true; info->has_auth = true; info->auth = g_strdup(vnc_auth_name(vd)); } qapi_free_SocketAddress(addr); return info; out_error: qapi_free_SocketAddress(addr); qapi_free_VncInfo(info); return NULL; } static void qmp_query_auth(int auth, int subauth, VncPrimaryAuth *qmp_auth, VncVencryptSubAuth *qmp_vencrypt, bool *qmp_has_vencrypt); static VncServerInfo2List *qmp_query_server_entry(QIOChannelSocket *ioc, bool websocket, int auth, int subauth, VncServerInfo2List *prev) { VncServerInfo2List *list; VncServerInfo2 *info; Error *err = NULL; SocketAddress *addr; addr = qio_channel_socket_get_local_address(ioc, &err); if (!addr) { error_free(err); return prev; } info = g_new0(VncServerInfo2, 1); vnc_init_basic_info(addr, qapi_VncServerInfo2_base(info), &err); qapi_free_SocketAddress(addr); if (err) { qapi_free_VncServerInfo2(info); error_free(err); return prev; } info->websocket = websocket; qmp_query_auth(auth, subauth, &info->auth, &info->vencrypt, &info->has_vencrypt); list = g_new0(VncServerInfo2List, 1); list->value = info; list->next = prev; return list; } static void qmp_query_auth(int auth, int subauth, VncPrimaryAuth *qmp_auth, VncVencryptSubAuth *qmp_vencrypt, bool *qmp_has_vencrypt) { switch (auth) { case VNC_AUTH_VNC: *qmp_auth = VNC_PRIMARY_AUTH_VNC; break; case VNC_AUTH_RA2: *qmp_auth = VNC_PRIMARY_AUTH_RA2; break; case VNC_AUTH_RA2NE: *qmp_auth = VNC_PRIMARY_AUTH_RA2NE; break; case VNC_AUTH_TIGHT: *qmp_auth = VNC_PRIMARY_AUTH_TIGHT; break; case VNC_AUTH_ULTRA: *qmp_auth = VNC_PRIMARY_AUTH_ULTRA; break; case VNC_AUTH_TLS: *qmp_auth = VNC_PRIMARY_AUTH_TLS; break; case VNC_AUTH_VENCRYPT: *qmp_auth = VNC_PRIMARY_AUTH_VENCRYPT; *qmp_has_vencrypt = true; switch (subauth) { case VNC_AUTH_VENCRYPT_PLAIN: *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_PLAIN; break; case VNC_AUTH_VENCRYPT_TLSNONE: *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_TLS_NONE; break; case VNC_AUTH_VENCRYPT_TLSVNC: *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_TLS_VNC; break; case VNC_AUTH_VENCRYPT_TLSPLAIN: *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_TLS_PLAIN; break; case VNC_AUTH_VENCRYPT_X509NONE: *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_X509_NONE; break; case VNC_AUTH_VENCRYPT_X509VNC: *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_X509_VNC; break; case VNC_AUTH_VENCRYPT_X509PLAIN: *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_X509_PLAIN; break; case VNC_AUTH_VENCRYPT_TLSSASL: *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_TLS_SASL; break; case VNC_AUTH_VENCRYPT_X509SASL: *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_X509_SASL; break; default: *qmp_has_vencrypt = false; break; } break; case VNC_AUTH_SASL: *qmp_auth = VNC_PRIMARY_AUTH_SASL; break; case VNC_AUTH_NONE: default: *qmp_auth = VNC_PRIMARY_AUTH_NONE; break; } } VncInfo2List *qmp_query_vnc_servers(Error **errp) { VncInfo2List *item, *prev = NULL; VncInfo2 *info; VncDisplay *vd; DeviceState *dev; size_t i; QTAILQ_FOREACH(vd, &vnc_displays, next) { info = g_new0(VncInfo2, 1); info->id = g_strdup(vd->id); info->clients = qmp_query_client_list(vd); qmp_query_auth(vd->auth, vd->subauth, &info->auth, &info->vencrypt, &info->has_vencrypt); if (vd->dcl.con) { dev = DEVICE(object_property_get_link(OBJECT(vd->dcl.con), "device", NULL)); info->has_display = true; info->display = g_strdup(dev->id); } for (i = 0; i < vd->nlsock; i++) { info->server = qmp_query_server_entry( vd->lsock[i], false, vd->auth, vd->subauth, info->server); } for (i = 0; i < vd->nlwebsock; i++) { info->server = qmp_query_server_entry( vd->lwebsock[i], true, vd->ws_auth, vd->ws_subauth, info->server); } item = g_new0(VncInfo2List, 1); item->value = info; item->next = prev; prev = item; } return prev; } /* TODO 1) Get the queue working for IO. 2) there is some weirdness when using the -S option (the screen is grey and not totally invalidated 3) resolutions > 1024 */ static int vnc_update_client(VncState *vs, int has_dirty, bool sync); static void vnc_disconnect_start(VncState *vs); static void vnc_colordepth(VncState *vs); static void framebuffer_update_request(VncState *vs, int incremental, int x_position, int y_position, int w, int h); static void vnc_refresh(DisplayChangeListener *dcl); static int vnc_refresh_server_surface(VncDisplay *vd); static int vnc_width(VncDisplay *vd) { return MIN(VNC_MAX_WIDTH, ROUND_UP(surface_width(vd->ds), VNC_DIRTY_PIXELS_PER_BIT)); } static int vnc_height(VncDisplay *vd) { return MIN(VNC_MAX_HEIGHT, surface_height(vd->ds)); } static void vnc_set_area_dirty(DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT), VncDisplay *vd, int x, int y, int w, int h) { int width = vnc_width(vd); int height = vnc_height(vd); /* this is needed this to ensure we updated all affected * blocks if x % VNC_DIRTY_PIXELS_PER_BIT != 0 */ w += (x % VNC_DIRTY_PIXELS_PER_BIT); x -= (x % VNC_DIRTY_PIXELS_PER_BIT); x = MIN(x, width); y = MIN(y, height); w = MIN(x + w, width) - x; h = MIN(y + h, height); for (; y < h; y++) { bitmap_set(dirty[y], x / VNC_DIRTY_PIXELS_PER_BIT, DIV_ROUND_UP(w, VNC_DIRTY_PIXELS_PER_BIT)); } } static void vnc_dpy_update(DisplayChangeListener *dcl, int x, int y, int w, int h) { VncDisplay *vd = container_of(dcl, VncDisplay, dcl); struct VncSurface *s = &vd->guest; vnc_set_area_dirty(s->dirty, vd, x, y, w, h); } void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h, int32_t encoding) { vnc_write_u16(vs, x); vnc_write_u16(vs, y); vnc_write_u16(vs, w); vnc_write_u16(vs, h); vnc_write_s32(vs, encoding); } static void vnc_desktop_resize(VncState *vs) { if (vs->ioc == NULL || !vnc_has_feature(vs, VNC_FEATURE_RESIZE)) { return; } if (vs->client_width == pixman_image_get_width(vs->vd->server) && vs->client_height == pixman_image_get_height(vs->vd->server)) { return; } vs->client_width = pixman_image_get_width(vs->vd->server); vs->client_height = pixman_image_get_height(vs->vd->server); vnc_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); vnc_write_u8(vs, 0); vnc_write_u16(vs, 1); /* number of rects */ vnc_framebuffer_update(vs, 0, 0, vs->client_width, vs->client_height, VNC_ENCODING_DESKTOPRESIZE); vnc_unlock_output(vs); vnc_flush(vs); } static void vnc_abort_display_jobs(VncDisplay *vd) { VncState *vs; QTAILQ_FOREACH(vs, &vd->clients, next) { vnc_lock_output(vs); vs->abort = true; vnc_unlock_output(vs); } QTAILQ_FOREACH(vs, &vd->clients, next) { vnc_jobs_join(vs); } QTAILQ_FOREACH(vs, &vd->clients, next) { vnc_lock_output(vs); vs->abort = false; vnc_unlock_output(vs); } } int vnc_server_fb_stride(VncDisplay *vd) { return pixman_image_get_stride(vd->server); } void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y) { uint8_t *ptr; ptr = (uint8_t *)pixman_image_get_data(vd->server); ptr += y * vnc_server_fb_stride(vd); ptr += x * VNC_SERVER_FB_BYTES; return ptr; } static void vnc_update_server_surface(VncDisplay *vd) { int width, height; qemu_pixman_image_unref(vd->server); vd->server = NULL; if (QTAILQ_EMPTY(&vd->clients)) { return; } width = vnc_width(vd); height = vnc_height(vd); vd->server = pixman_image_create_bits(VNC_SERVER_FB_FORMAT, width, height, NULL, 0); memset(vd->guest.dirty, 0x00, sizeof(vd->guest.dirty)); vnc_set_area_dirty(vd->guest.dirty, vd, 0, 0, width, height); } static void vnc_dpy_switch(DisplayChangeListener *dcl, DisplaySurface *surface) { VncDisplay *vd = container_of(dcl, VncDisplay, dcl); VncState *vs; vnc_abort_display_jobs(vd); vd->ds = surface; /* server surface */ vnc_update_server_surface(vd); /* guest surface */ qemu_pixman_image_unref(vd->guest.fb); vd->guest.fb = pixman_image_ref(surface->image); vd->guest.format = surface->format; QTAILQ_FOREACH(vs, &vd->clients, next) { vnc_colordepth(vs); vnc_desktop_resize(vs); if (vs->vd->cursor) { vnc_cursor_define(vs); } memset(vs->dirty, 0x00, sizeof(vs->dirty)); vnc_set_area_dirty(vs->dirty, vd, 0, 0, vnc_width(vd), vnc_height(vd)); } } /* fastest code */ static void vnc_write_pixels_copy(VncState *vs, void *pixels, int size) { vnc_write(vs, pixels, size); } /* slowest but generic code. */ void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v) { uint8_t r, g, b; #if VNC_SERVER_FB_FORMAT == PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8) r = (((v & 0x00ff0000) >> 16) << vs->client_pf.rbits) >> 8; g = (((v & 0x0000ff00) >> 8) << vs->client_pf.gbits) >> 8; b = (((v & 0x000000ff) >> 0) << vs->client_pf.bbits) >> 8; #else # error need some bits here if you change VNC_SERVER_FB_FORMAT #endif v = (r << vs->client_pf.rshift) | (g << vs->client_pf.gshift) | (b << vs->client_pf.bshift); switch (vs->client_pf.bytes_per_pixel) { case 1: buf[0] = v; break; case 2: if (vs->client_be) { buf[0] = v >> 8; buf[1] = v; } else { buf[1] = v >> 8; buf[0] = v; } break; default: case 4: if (vs->client_be) { buf[0] = v >> 24; buf[1] = v >> 16; buf[2] = v >> 8; buf[3] = v; } else { buf[3] = v >> 24; buf[2] = v >> 16; buf[1] = v >> 8; buf[0] = v; } break; } } static void vnc_write_pixels_generic(VncState *vs, void *pixels1, int size) { uint8_t buf[4]; if (VNC_SERVER_FB_BYTES == 4) { uint32_t *pixels = pixels1; int n, i; n = size >> 2; for (i = 0; i < n; i++) { vnc_convert_pixel(vs, buf, pixels[i]); vnc_write(vs, buf, vs->client_pf.bytes_per_pixel); } } } int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h) { int i; uint8_t *row; VncDisplay *vd = vs->vd; row = vnc_server_fb_ptr(vd, x, y); for (i = 0; i < h; i++) { vs->write_pixels(vs, row, w * VNC_SERVER_FB_BYTES); row += vnc_server_fb_stride(vd); } return 1; } int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h) { int n = 0; bool encode_raw = false; size_t saved_offs = vs->output.offset; switch(vs->vnc_encoding) { case VNC_ENCODING_ZLIB: n = vnc_zlib_send_framebuffer_update(vs, x, y, w, h); break; case VNC_ENCODING_HEXTILE: vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_HEXTILE); n = vnc_hextile_send_framebuffer_update(vs, x, y, w, h); break; case VNC_ENCODING_TIGHT: n = vnc_tight_send_framebuffer_update(vs, x, y, w, h); break; case VNC_ENCODING_TIGHT_PNG: n = vnc_tight_png_send_framebuffer_update(vs, x, y, w, h); break; case VNC_ENCODING_ZRLE: n = vnc_zrle_send_framebuffer_update(vs, x, y, w, h); break; case VNC_ENCODING_ZYWRLE: n = vnc_zywrle_send_framebuffer_update(vs, x, y, w, h); break; default: encode_raw = true; break; } /* If the client has the same pixel format as our internal buffer and * a RAW encoding would need less space fall back to RAW encoding to * save bandwidth and processing power in the client. */ if (!encode_raw && vs->write_pixels == vnc_write_pixels_copy && 12 + h * w * VNC_SERVER_FB_BYTES <= (vs->output.offset - saved_offs)) { vs->output.offset = saved_offs; encode_raw = true; } if (encode_raw) { vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_RAW); n = vnc_raw_send_framebuffer_update(vs, x, y, w, h); } return n; } static void vnc_copy(VncState *vs, int src_x, int src_y, int dst_x, int dst_y, int w, int h) { /* send bitblit op to the vnc client */ vnc_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); vnc_write_u8(vs, 0); vnc_write_u16(vs, 1); /* number of rects */ vnc_framebuffer_update(vs, dst_x, dst_y, w, h, VNC_ENCODING_COPYRECT); vnc_write_u16(vs, src_x); vnc_write_u16(vs, src_y); vnc_unlock_output(vs); vnc_flush(vs); } static void vnc_dpy_copy(DisplayChangeListener *dcl, int src_x, int src_y, int dst_x, int dst_y, int w, int h) { VncDisplay *vd = container_of(dcl, VncDisplay, dcl); VncState *vs, *vn; uint8_t *src_row; uint8_t *dst_row; int i, x, y, pitch, inc, w_lim, s; int cmp_bytes; if (!vd->server) { /* no client connected */ return; } vnc_refresh_server_surface(vd); QTAILQ_FOREACH_SAFE(vs, &vd->clients, next, vn) { if (vnc_has_feature(vs, VNC_FEATURE_COPYRECT)) { vs->force_update = 1; vnc_update_client(vs, 1, true); /* vs might be free()ed here */ } } if (!vd->server) { /* no client connected */ return; } /* do bitblit op on the local surface too */ pitch = vnc_server_fb_stride(vd); src_row = vnc_server_fb_ptr(vd, src_x, src_y); dst_row = vnc_server_fb_ptr(vd, dst_x, dst_y); y = dst_y; inc = 1; if (dst_y > src_y) { /* copy backwards */ src_row += pitch * (h-1); dst_row += pitch * (h-1); pitch = -pitch; y = dst_y + h - 1; inc = -1; } w_lim = w - (VNC_DIRTY_PIXELS_PER_BIT - (dst_x % VNC_DIRTY_PIXELS_PER_BIT)); if (w_lim < 0) { w_lim = w; } else { w_lim = w - (w_lim % VNC_DIRTY_PIXELS_PER_BIT); } for (i = 0; i < h; i++) { for (x = 0; x <= w_lim; x += s, src_row += cmp_bytes, dst_row += cmp_bytes) { if (x == w_lim) { if ((s = w - w_lim) == 0) break; } else if (!x) { s = (VNC_DIRTY_PIXELS_PER_BIT - (dst_x % VNC_DIRTY_PIXELS_PER_BIT)); s = MIN(s, w_lim); } else { s = VNC_DIRTY_PIXELS_PER_BIT; } cmp_bytes = s * VNC_SERVER_FB_BYTES; if (memcmp(src_row, dst_row, cmp_bytes) == 0) continue; memmove(dst_row, src_row, cmp_bytes); QTAILQ_FOREACH(vs, &vd->clients, next) { if (!vnc_has_feature(vs, VNC_FEATURE_COPYRECT)) { set_bit(((x + dst_x) / VNC_DIRTY_PIXELS_PER_BIT), vs->dirty[y]); } } } src_row += pitch - w * VNC_SERVER_FB_BYTES; dst_row += pitch - w * VNC_SERVER_FB_BYTES; y += inc; } QTAILQ_FOREACH(vs, &vd->clients, next) { if (vnc_has_feature(vs, VNC_FEATURE_COPYRECT)) { vnc_copy(vs, src_x, src_y, dst_x, dst_y, w, h); } } } static void vnc_mouse_set(DisplayChangeListener *dcl, int x, int y, int visible) { /* can we ask the client(s) to move the pointer ??? */ } static int vnc_cursor_define(VncState *vs) { QEMUCursor *c = vs->vd->cursor; int isize; if (vnc_has_feature(vs, VNC_FEATURE_RICH_CURSOR)) { vnc_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); vnc_write_u8(vs, 0); /* padding */ vnc_write_u16(vs, 1); /* # of rects */ vnc_framebuffer_update(vs, c->hot_x, c->hot_y, c->width, c->height, VNC_ENCODING_RICH_CURSOR); isize = c->width * c->height * vs->client_pf.bytes_per_pixel; vnc_write_pixels_generic(vs, c->data, isize); vnc_write(vs, vs->vd->cursor_mask, vs->vd->cursor_msize); vnc_unlock_output(vs); return 0; } return -1; } static void vnc_dpy_cursor_define(DisplayChangeListener *dcl, QEMUCursor *c) { VncDisplay *vd = container_of(dcl, VncDisplay, dcl); VncState *vs; cursor_put(vd->cursor); g_free(vd->cursor_mask); vd->cursor = c; cursor_get(vd->cursor); vd->cursor_msize = cursor_get_mono_bpl(c) * c->height; vd->cursor_mask = g_malloc0(vd->cursor_msize); cursor_get_mono_mask(c, 0, vd->cursor_mask); QTAILQ_FOREACH(vs, &vd->clients, next) { vnc_cursor_define(vs); } } static int find_and_clear_dirty_height(VncState *vs, int y, int last_x, int x, int height) { int h; for (h = 1; h < (height - y); h++) { if (!test_bit(last_x, vs->dirty[y + h])) { break; } bitmap_clear(vs->dirty[y + h], last_x, x - last_x); } return h; } static int vnc_update_client(VncState *vs, int has_dirty, bool sync) { if (vs->disconnecting) { vnc_disconnect_finish(vs); return 0; } vs->has_dirty += has_dirty; if (vs->need_update && !vs->disconnecting) { VncDisplay *vd = vs->vd; VncJob *job; int y; int height, width; int n = 0; if (vs->output.offset && !vs->audio_cap && !vs->force_update) /* kernel send buffers are full -> drop frames to throttle */ return 0; if (!vs->has_dirty && !vs->audio_cap && !vs->force_update) return 0; /* * Send screen updates to the vnc client using the server * surface and server dirty map. guest surface updates * happening in parallel don't disturb us, the next pass will * send them to the client. */ job = vnc_job_new(vs); height = pixman_image_get_height(vd->server); width = pixman_image_get_width(vd->server); y = 0; for (;;) { int x, h; unsigned long x2; unsigned long offset = find_next_bit((unsigned long *) &vs->dirty, height * VNC_DIRTY_BPL(vs), y * VNC_DIRTY_BPL(vs)); if (offset == height * VNC_DIRTY_BPL(vs)) { /* no more dirty bits */ break; } y = offset / VNC_DIRTY_BPL(vs); x = offset % VNC_DIRTY_BPL(vs); x2 = find_next_zero_bit((unsigned long *) &vs->dirty[y], VNC_DIRTY_BPL(vs), x); bitmap_clear(vs->dirty[y], x, x2 - x); h = find_and_clear_dirty_height(vs, y, x, x2, height); x2 = MIN(x2, width / VNC_DIRTY_PIXELS_PER_BIT); if (x2 > x) { n += vnc_job_add_rect(job, x * VNC_DIRTY_PIXELS_PER_BIT, y, (x2 - x) * VNC_DIRTY_PIXELS_PER_BIT, h); } if (!x && x2 == width / VNC_DIRTY_PIXELS_PER_BIT) { y += h; if (y == height) { break; } } } vnc_job_push(job); if (sync) { vnc_jobs_join(vs); } vs->force_update = 0; vs->has_dirty = 0; return n; } if (vs->disconnecting) { vnc_disconnect_finish(vs); } else if (sync) { vnc_jobs_join(vs); } return 0; } /* audio */ static void audio_capture_notify(void *opaque, audcnotification_e cmd) { VncState *vs = opaque; switch (cmd) { case AUD_CNOTIFY_DISABLE: vnc_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_QEMU); vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO); vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_END); vnc_unlock_output(vs); vnc_flush(vs); break; case AUD_CNOTIFY_ENABLE: vnc_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_QEMU); vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO); vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_BEGIN); vnc_unlock_output(vs); vnc_flush(vs); break; } } static void audio_capture_destroy(void *opaque) { } static void audio_capture(void *opaque, void *buf, int size) { VncState *vs = opaque; vnc_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_QEMU); vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO); vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_DATA); vnc_write_u32(vs, size); vnc_write(vs, buf, size); vnc_unlock_output(vs); vnc_flush(vs); } static void audio_add(VncState *vs) { struct audio_capture_ops ops; if (vs->audio_cap) { error_report("audio already running"); return; } ops.notify = audio_capture_notify; ops.destroy = audio_capture_destroy; ops.capture = audio_capture; vs->audio_cap = AUD_add_capture(&vs->as, &ops, vs); if (!vs->audio_cap) { error_report("Failed to add audio capture"); } } static void audio_del(VncState *vs) { if (vs->audio_cap) { AUD_del_capture(vs->audio_cap, vs); vs->audio_cap = NULL; } } static void vnc_disconnect_start(VncState *vs) { if (vs->disconnecting) { return; } vnc_set_share_mode(vs, VNC_SHARE_MODE_DISCONNECTED); if (vs->ioc_tag) { g_source_remove(vs->ioc_tag); } qio_channel_close(vs->ioc, NULL); vs->disconnecting = TRUE; } void vnc_disconnect_finish(VncState *vs) { int i; vnc_jobs_join(vs); /* Wait encoding jobs */ vnc_lock_output(vs); vnc_qmp_event(vs, QAPI_EVENT_VNC_DISCONNECTED); buffer_free(&vs->input); buffer_free(&vs->output); qapi_free_VncClientInfo(vs->info); vnc_zlib_clear(vs); vnc_tight_clear(vs); vnc_zrle_clear(vs); #ifdef CONFIG_VNC_SASL vnc_sasl_client_cleanup(vs); #endif /* CONFIG_VNC_SASL */ audio_del(vs); vnc_release_modifiers(vs); if (vs->mouse_mode_notifier.notify != NULL) { qemu_remove_mouse_mode_change_notifier(&vs->mouse_mode_notifier); } QTAILQ_REMOVE(&vs->vd->clients, vs, next); if (QTAILQ_EMPTY(&vs->vd->clients)) { /* last client gone */ vnc_update_server_surface(vs->vd); } vnc_unlock_output(vs); qemu_mutex_destroy(&vs->output_mutex); if (vs->bh != NULL) { qemu_bh_delete(vs->bh); } buffer_free(&vs->jobs_buffer); for (i = 0; i < VNC_STAT_ROWS; ++i) { g_free(vs->lossy_rect[i]); } g_free(vs->lossy_rect); object_unref(OBJECT(vs->ioc)); vs->ioc = NULL; object_unref(OBJECT(vs->sioc)); vs->sioc = NULL; g_free(vs); } ssize_t vnc_client_io_error(VncState *vs, ssize_t ret, Error **errp) { if (ret <= 0) { if (ret == 0) { VNC_DEBUG("Closing down client sock: EOF\n"); vnc_disconnect_start(vs); } else if (ret != QIO_CHANNEL_ERR_BLOCK) { VNC_DEBUG("Closing down client sock: ret %zd (%s)\n", ret, errp ? error_get_pretty(*errp) : "Unknown"); vnc_disconnect_start(vs); } if (errp) { error_free(*errp); *errp = NULL; } return 0; } return ret; } void vnc_client_error(VncState *vs) { VNC_DEBUG("Closing down client sock: protocol error\n"); vnc_disconnect_start(vs); } /* * Called to write a chunk of data to the client socket. The data may * be the raw data, or may have already been encoded by SASL. * The data will be written either straight onto the socket, or * written via the GNUTLS wrappers, if TLS/SSL encryption is enabled * * NB, it is theoretically possible to have 2 layers of encryption, * both SASL, and this TLS layer. It is highly unlikely in practice * though, since SASL encryption will typically be a no-op if TLS * is active * * Returns the number of bytes written, which may be less than * the requested 'datalen' if the socket would block. Returns * -1 on error, and disconnects the client socket. */ ssize_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen) { Error *err = NULL; ssize_t ret; ret = qio_channel_write( vs->ioc, (const char *)data, datalen, &err); VNC_DEBUG("Wrote wire %p %zd -> %ld\n", data, datalen, ret); return vnc_client_io_error(vs, ret, &err); } /* * Called to write buffered data to the client socket, when not * using any SASL SSF encryption layers. Will write as much data * as possible without blocking. If all buffered data is written, * will switch the FD poll() handler back to read monitoring. * * Returns the number of bytes written, which may be less than * the buffered output data if the socket would block. Returns * -1 on error, and disconnects the client socket. */ static ssize_t vnc_client_write_plain(VncState *vs) { ssize_t ret; #ifdef CONFIG_VNC_SASL VNC_DEBUG("Write Plain: Pending output %p size %zd offset %zd. Wait SSF %d\n", vs->output.buffer, vs->output.capacity, vs->output.offset, vs->sasl.waitWriteSSF); if (vs->sasl.conn && vs->sasl.runSSF && vs->sasl.waitWriteSSF) { ret = vnc_client_write_buf(vs, vs->output.buffer, vs->sasl.waitWriteSSF); if (ret) vs->sasl.waitWriteSSF -= ret; } else #endif /* CONFIG_VNC_SASL */ ret = vnc_client_write_buf(vs, vs->output.buffer, vs->output.offset); if (!ret) return 0; buffer_advance(&vs->output, ret); if (vs->output.offset == 0) { if (vs->ioc_tag) { g_source_remove(vs->ioc_tag); } vs->ioc_tag = qio_channel_add_watch( vs->ioc, G_IO_IN, vnc_client_io, vs, NULL); } return ret; } /* * First function called whenever there is data to be written to * the client socket. Will delegate actual work according to whether * SASL SSF layers are enabled (thus requiring encryption calls) */ static void vnc_client_write_locked(VncState *vs) { #ifdef CONFIG_VNC_SASL if (vs->sasl.conn && vs->sasl.runSSF && !vs->sasl.waitWriteSSF) { vnc_client_write_sasl(vs); } else #endif /* CONFIG_VNC_SASL */ { vnc_client_write_plain(vs); } } static void vnc_client_write(VncState *vs) { vnc_lock_output(vs); if (vs->output.offset) { vnc_client_write_locked(vs); } else if (vs->ioc != NULL) { if (vs->ioc_tag) { g_source_remove(vs->ioc_tag); } vs->ioc_tag = qio_channel_add_watch( vs->ioc, G_IO_IN, vnc_client_io, vs, NULL); } vnc_unlock_output(vs); } void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting) { vs->read_handler = func; vs->read_handler_expect = expecting; } /* * Called to read a chunk of data from the client socket. The data may * be the raw data, or may need to be further decoded by SASL. * The data will be read either straight from to the socket, or * read via the GNUTLS wrappers, if TLS/SSL encryption is enabled * * NB, it is theoretically possible to have 2 layers of encryption, * both SASL, and this TLS layer. It is highly unlikely in practice * though, since SASL encryption will typically be a no-op if TLS * is active * * Returns the number of bytes read, which may be less than * the requested 'datalen' if the socket would block. Returns * -1 on error, and disconnects the client socket. */ ssize_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen) { ssize_t ret; Error *err = NULL; ret = qio_channel_read( vs->ioc, (char *)data, datalen, &err); VNC_DEBUG("Read wire %p %zd -> %ld\n", data, datalen, ret); return vnc_client_io_error(vs, ret, &err); } /* * Called to read data from the client socket to the input buffer, * when not using any SASL SSF encryption layers. Will read as much * data as possible without blocking. * * Returns the number of bytes read. Returns -1 on error, and * disconnects the client socket. */ static ssize_t vnc_client_read_plain(VncState *vs) { ssize_t ret; VNC_DEBUG("Read plain %p size %zd offset %zd\n", vs->input.buffer, vs->input.capacity, vs->input.offset); buffer_reserve(&vs->input, 4096); ret = vnc_client_read_buf(vs, buffer_end(&vs->input), 4096); if (!ret) return 0; vs->input.offset += ret; return ret; } static void vnc_jobs_bh(void *opaque) { VncState *vs = opaque; vnc_jobs_consume_buffer(vs); } /* * First function called whenever there is more data to be read from * the client socket. Will delegate actual work according to whether * SASL SSF layers are enabled (thus requiring decryption calls) * Returns 0 on success, -1 if client disconnected */ static int vnc_client_read(VncState *vs) { ssize_t ret; #ifdef CONFIG_VNC_SASL if (vs->sasl.conn && vs->sasl.runSSF) ret = vnc_client_read_sasl(vs); else #endif /* CONFIG_VNC_SASL */ ret = vnc_client_read_plain(vs); if (!ret) { if (vs->disconnecting) { vnc_disconnect_finish(vs); return -1; } return 0; } while (vs->read_handler && vs->input.offset >= vs->read_handler_expect) { size_t len = vs->read_handler_expect; int ret; ret = vs->read_handler(vs, vs->input.buffer, len); if (vs->disconnecting) { vnc_disconnect_finish(vs); return -1; } if (!ret) { buffer_advance(&vs->input, len); } else { vs->read_handler_expect = ret; } } return 0; } gboolean vnc_client_io(QIOChannel *ioc G_GNUC_UNUSED, GIOCondition condition, void *opaque) { VncState *vs = opaque; if (condition & G_IO_IN) { if (vnc_client_read(vs) < 0) { return TRUE; } } if (condition & G_IO_OUT) { vnc_client_write(vs); } return TRUE; } void vnc_write(VncState *vs, const void *data, size_t len) { buffer_reserve(&vs->output, len); if (vs->ioc != NULL && buffer_empty(&vs->output)) { if (vs->ioc_tag) { g_source_remove(vs->ioc_tag); } vs->ioc_tag = qio_channel_add_watch( vs->ioc, G_IO_IN | G_IO_OUT, vnc_client_io, vs, NULL); } buffer_append(&vs->output, data, len); } void vnc_write_s32(VncState *vs, int32_t value) { vnc_write_u32(vs, *(uint32_t *)&value); } void vnc_write_u32(VncState *vs, uint32_t value) { uint8_t buf[4]; buf[0] = (value >> 24) & 0xFF; buf[1] = (value >> 16) & 0xFF; buf[2] = (value >> 8) & 0xFF; buf[3] = value & 0xFF; vnc_write(vs, buf, 4); } void vnc_write_u16(VncState *vs, uint16_t value) { uint8_t buf[2]; buf[0] = (value >> 8) & 0xFF; buf[1] = value & 0xFF; vnc_write(vs, buf, 2); } void vnc_write_u8(VncState *vs, uint8_t value) { vnc_write(vs, (char *)&value, 1); } void vnc_flush(VncState *vs) { vnc_lock_output(vs); if (vs->ioc != NULL && vs->output.offset) { vnc_client_write_locked(vs); } vnc_unlock_output(vs); } static uint8_t read_u8(uint8_t *data, size_t offset) { return data[offset]; } static uint16_t read_u16(uint8_t *data, size_t offset) { return ((data[offset] & 0xFF) << 8) | (data[offset + 1] & 0xFF); } static int32_t read_s32(uint8_t *data, size_t offset) { return (int32_t)((data[offset] << 24) | (data[offset + 1] << 16) | (data[offset + 2] << 8) | data[offset + 3]); } uint32_t read_u32(uint8_t *data, size_t offset) { return ((data[offset] << 24) | (data[offset + 1] << 16) | (data[offset + 2] << 8) | data[offset + 3]); } static void client_cut_text(VncState *vs, size_t len, uint8_t *text) { } static void check_pointer_type_change(Notifier *notifier, void *data) { VncState *vs = container_of(notifier, VncState, mouse_mode_notifier); int absolute = qemu_input_is_absolute(); if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE) && vs->absolute != absolute) { vnc_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); vnc_write_u8(vs, 0); vnc_write_u16(vs, 1); vnc_framebuffer_update(vs, absolute, 0, pixman_image_get_width(vs->vd->server), pixman_image_get_height(vs->vd->server), VNC_ENCODING_POINTER_TYPE_CHANGE); vnc_unlock_output(vs); vnc_flush(vs); } vs->absolute = absolute; } static void pointer_event(VncState *vs, int button_mask, int x, int y) { static uint32_t bmap[INPUT_BUTTON__MAX] = { [INPUT_BUTTON_LEFT] = 0x01, [INPUT_BUTTON_MIDDLE] = 0x02, [INPUT_BUTTON_RIGHT] = 0x04, [INPUT_BUTTON_WHEEL_UP] = 0x08, [INPUT_BUTTON_WHEEL_DOWN] = 0x10, }; QemuConsole *con = vs->vd->dcl.con; int width = pixman_image_get_width(vs->vd->server); int height = pixman_image_get_height(vs->vd->server); if (vs->last_bmask != button_mask) { qemu_input_update_buttons(con, bmap, vs->last_bmask, button_mask); vs->last_bmask = button_mask; } if (vs->absolute) { qemu_input_queue_abs(con, INPUT_AXIS_X, x, width); qemu_input_queue_abs(con, INPUT_AXIS_Y, y, height); } else if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE)) { qemu_input_queue_rel(con, INPUT_AXIS_X, x - 0x7FFF); qemu_input_queue_rel(con, INPUT_AXIS_Y, y - 0x7FFF); } else { if (vs->last_x != -1) { qemu_input_queue_rel(con, INPUT_AXIS_X, x - vs->last_x); qemu_input_queue_rel(con, INPUT_AXIS_Y, y - vs->last_y); } vs->last_x = x; vs->last_y = y; } qemu_input_event_sync(); } static void reset_keys(VncState *vs) { int i; for(i = 0; i < 256; i++) { if (vs->modifiers_state[i]) { qemu_input_event_send_key_number(vs->vd->dcl.con, i, false); qemu_input_event_send_key_delay(vs->vd->key_delay_ms); vs->modifiers_state[i] = 0; } } } static void press_key(VncState *vs, int keysym) { int keycode = keysym2scancode(vs->vd->kbd_layout, keysym) & SCANCODE_KEYMASK; qemu_input_event_send_key_number(vs->vd->dcl.con, keycode, true); qemu_input_event_send_key_delay(vs->vd->key_delay_ms); qemu_input_event_send_key_number(vs->vd->dcl.con, keycode, false); qemu_input_event_send_key_delay(vs->vd->key_delay_ms); } static void vnc_led_state_change(VncState *vs) { if (!vnc_has_feature(vs, VNC_FEATURE_LED_STATE)) { return; } vnc_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); vnc_write_u8(vs, 0); vnc_write_u16(vs, 1); vnc_framebuffer_update(vs, 0, 0, 1, 1, VNC_ENCODING_LED_STATE); vnc_write_u8(vs, vs->vd->ledstate); vnc_unlock_output(vs); vnc_flush(vs); } static void kbd_leds(void *opaque, int ledstate) { VncDisplay *vd = opaque; VncState *client; trace_vnc_key_guest_leds((ledstate & QEMU_CAPS_LOCK_LED), (ledstate & QEMU_NUM_LOCK_LED), (ledstate & QEMU_SCROLL_LOCK_LED)); if (ledstate == vd->ledstate) { return; } vd->ledstate = ledstate; QTAILQ_FOREACH(client, &vd->clients, next) { vnc_led_state_change(client); } } static void do_key_event(VncState *vs, int down, int keycode, int sym) { /* QEMU console switch */ switch(keycode) { case 0x2a: /* Left Shift */ case 0x36: /* Right Shift */ case 0x1d: /* Left CTRL */ case 0x9d: /* Right CTRL */ case 0x38: /* Left ALT */ case 0xb8: /* Right ALT */ if (down) vs->modifiers_state[keycode] = 1; else vs->modifiers_state[keycode] = 0; break; case 0x02 ... 0x0a: /* '1' to '9' keys */ if (vs->vd->dcl.con == NULL && down && vs->modifiers_state[0x1d] && vs->modifiers_state[0x38]) { /* Reset the modifiers sent to the current console */ reset_keys(vs); console_select(keycode - 0x02); return; } break; case 0x3a: /* CapsLock */ case 0x45: /* NumLock */ if (down) vs->modifiers_state[keycode] ^= 1; break; } /* Turn off the lock state sync logic if the client support the led state extension. */ if (down && vs->vd->lock_key_sync && !vnc_has_feature(vs, VNC_FEATURE_LED_STATE) && keycode_is_keypad(vs->vd->kbd_layout, keycode)) { /* If the numlock state needs to change then simulate an additional keypress before sending this one. This will happen if the user toggles numlock away from the VNC window. */ if (keysym_is_numlock(vs->vd->kbd_layout, sym & 0xFFFF)) { if (!vs->modifiers_state[0x45]) { trace_vnc_key_sync_numlock(true); vs->modifiers_state[0x45] = 1; press_key(vs, 0xff7f); } } else { if (vs->modifiers_state[0x45]) { trace_vnc_key_sync_numlock(false); vs->modifiers_state[0x45] = 0; press_key(vs, 0xff7f); } } } if (down && vs->vd->lock_key_sync && !vnc_has_feature(vs, VNC_FEATURE_LED_STATE) && ((sym >= 'A' && sym <= 'Z') || (sym >= 'a' && sym <= 'z'))) { /* If the capslock state needs to change then simulate an additional keypress before sending this one. This will happen if the user toggles capslock away from the VNC window. */ int uppercase = !!(sym >= 'A' && sym <= 'Z'); int shift = !!(vs->modifiers_state[0x2a] | vs->modifiers_state[0x36]); int capslock = !!(vs->modifiers_state[0x3a]); if (capslock) { if (uppercase == shift) { trace_vnc_key_sync_capslock(false); vs->modifiers_state[0x3a] = 0; press_key(vs, 0xffe5); } } else { if (uppercase != shift) { trace_vnc_key_sync_capslock(true); vs->modifiers_state[0x3a] = 1; press_key(vs, 0xffe5); } } } if (qemu_console_is_graphic(NULL)) { qemu_input_event_send_key_number(vs->vd->dcl.con, keycode, down); qemu_input_event_send_key_delay(vs->vd->key_delay_ms); } else { bool numlock = vs->modifiers_state[0x45]; bool control = (vs->modifiers_state[0x1d] || vs->modifiers_state[0x9d]); /* QEMU console emulation */ if (down) { switch (keycode) { case 0x2a: /* Left Shift */ case 0x36: /* Right Shift */ case 0x1d: /* Left CTRL */ case 0x9d: /* Right CTRL */ case 0x38: /* Left ALT */ case 0xb8: /* Right ALT */ break; case 0xc8: kbd_put_keysym(QEMU_KEY_UP); break; case 0xd0: kbd_put_keysym(QEMU_KEY_DOWN); break; case 0xcb: kbd_put_keysym(QEMU_KEY_LEFT); break; case 0xcd: kbd_put_keysym(QEMU_KEY_RIGHT); break; case 0xd3: kbd_put_keysym(QEMU_KEY_DELETE); break; case 0xc7: kbd_put_keysym(QEMU_KEY_HOME); break; case 0xcf: kbd_put_keysym(QEMU_KEY_END); break; case 0xc9: kbd_put_keysym(QEMU_KEY_PAGEUP); break; case 0xd1: kbd_put_keysym(QEMU_KEY_PAGEDOWN); break; case 0x47: kbd_put_keysym(numlock ? '7' : QEMU_KEY_HOME); break; case 0x48: kbd_put_keysym(numlock ? '8' : QEMU_KEY_UP); break; case 0x49: kbd_put_keysym(numlock ? '9' : QEMU_KEY_PAGEUP); break; case 0x4b: kbd_put_keysym(numlock ? '4' : QEMU_KEY_LEFT); break; case 0x4c: kbd_put_keysym('5'); break; case 0x4d: kbd_put_keysym(numlock ? '6' : QEMU_KEY_RIGHT); break; case 0x4f: kbd_put_keysym(numlock ? '1' : QEMU_KEY_END); break; case 0x50: kbd_put_keysym(numlock ? '2' : QEMU_KEY_DOWN); break; case 0x51: kbd_put_keysym(numlock ? '3' : QEMU_KEY_PAGEDOWN); break; case 0x52: kbd_put_keysym('0'); break; case 0x53: kbd_put_keysym(numlock ? '.' : QEMU_KEY_DELETE); break; case 0xb5: kbd_put_keysym('/'); break; case 0x37: kbd_put_keysym('*'); break; case 0x4a: kbd_put_keysym('-'); break; case 0x4e: kbd_put_keysym('+'); break; case 0x9c: kbd_put_keysym('\n'); break; default: if (control) { kbd_put_keysym(sym & 0x1f); } else { kbd_put_keysym(sym); } break; } } } } static void vnc_release_modifiers(VncState *vs) { static const int keycodes[] = { /* shift, control, alt keys, both left & right */ 0x2a, 0x36, 0x1d, 0x9d, 0x38, 0xb8, }; int i, keycode; if (!qemu_console_is_graphic(NULL)) { return; } for (i = 0; i < ARRAY_SIZE(keycodes); i++) { keycode = keycodes[i]; if (!vs->modifiers_state[keycode]) { continue; } qemu_input_event_send_key_number(vs->vd->dcl.con, keycode, false); qemu_input_event_send_key_delay(vs->vd->key_delay_ms); } } static const char *code2name(int keycode) { return QKeyCode_lookup[qemu_input_key_number_to_qcode(keycode)]; } static void key_event(VncState *vs, int down, uint32_t sym) { int keycode; int lsym = sym; if (lsym >= 'A' && lsym <= 'Z' && qemu_console_is_graphic(NULL)) { lsym = lsym - 'A' + 'a'; } keycode = keysym2scancode(vs->vd->kbd_layout, lsym & 0xFFFF) & SCANCODE_KEYMASK; trace_vnc_key_event_map(down, sym, keycode, code2name(keycode)); do_key_event(vs, down, keycode, sym); } static void ext_key_event(VncState *vs, int down, uint32_t sym, uint16_t keycode) { /* if the user specifies a keyboard layout, always use it */ if (keyboard_layout) { key_event(vs, down, sym); } else { trace_vnc_key_event_ext(down, sym, keycode, code2name(keycode)); do_key_event(vs, down, keycode, sym); } } static void framebuffer_update_request(VncState *vs, int incremental, int x, int y, int w, int h) { vs->need_update = 1; if (incremental) { return; } vs->force_update = 1; vnc_set_area_dirty(vs->dirty, vs->vd, x, y, w, h); } static void send_ext_key_event_ack(VncState *vs) { vnc_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); vnc_write_u8(vs, 0); vnc_write_u16(vs, 1); vnc_framebuffer_update(vs, 0, 0, pixman_image_get_width(vs->vd->server), pixman_image_get_height(vs->vd->server), VNC_ENCODING_EXT_KEY_EVENT); vnc_unlock_output(vs); vnc_flush(vs); } static void send_ext_audio_ack(VncState *vs) { vnc_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); vnc_write_u8(vs, 0); vnc_write_u16(vs, 1); vnc_framebuffer_update(vs, 0, 0, pixman_image_get_width(vs->vd->server), pixman_image_get_height(vs->vd->server), VNC_ENCODING_AUDIO); vnc_unlock_output(vs); vnc_flush(vs); } static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings) { int i; unsigned int enc = 0; vs->features = 0; vs->vnc_encoding = 0; vs->tight.compression = 9; vs->tight.quality = -1; /* Lossless by default */ vs->absolute = -1; /* * Start from the end because the encodings are sent in order of preference. * This way the preferred encoding (first encoding defined in the array) * will be set at the end of the loop. */ for (i = n_encodings - 1; i >= 0; i--) { enc = encodings[i]; switch (enc) { case VNC_ENCODING_RAW: vs->vnc_encoding = enc; break; case VNC_ENCODING_COPYRECT: vs->features |= VNC_FEATURE_COPYRECT_MASK; break; case VNC_ENCODING_HEXTILE: vs->features |= VNC_FEATURE_HEXTILE_MASK; vs->vnc_encoding = enc; break; case VNC_ENCODING_TIGHT: vs->features |= VNC_FEATURE_TIGHT_MASK; vs->vnc_encoding = enc; break; #ifdef CONFIG_VNC_PNG case VNC_ENCODING_TIGHT_PNG: vs->features |= VNC_FEATURE_TIGHT_PNG_MASK; vs->vnc_encoding = enc; break; #endif case VNC_ENCODING_ZLIB: vs->features |= VNC_FEATURE_ZLIB_MASK; vs->vnc_encoding = enc; break; case VNC_ENCODING_ZRLE: vs->features |= VNC_FEATURE_ZRLE_MASK; vs->vnc_encoding = enc; break; case VNC_ENCODING_ZYWRLE: vs->features |= VNC_FEATURE_ZYWRLE_MASK; vs->vnc_encoding = enc; break; case VNC_ENCODING_DESKTOPRESIZE: vs->features |= VNC_FEATURE_RESIZE_MASK; break; case VNC_ENCODING_POINTER_TYPE_CHANGE: vs->features |= VNC_FEATURE_POINTER_TYPE_CHANGE_MASK; break; case VNC_ENCODING_RICH_CURSOR: vs->features |= VNC_FEATURE_RICH_CURSOR_MASK; if (vs->vd->cursor) { vnc_cursor_define(vs); } break; case VNC_ENCODING_EXT_KEY_EVENT: send_ext_key_event_ack(vs); break; case VNC_ENCODING_AUDIO: send_ext_audio_ack(vs); break; case VNC_ENCODING_WMVi: vs->features |= VNC_FEATURE_WMVI_MASK; break; case VNC_ENCODING_LED_STATE: vs->features |= VNC_FEATURE_LED_STATE_MASK; break; case VNC_ENCODING_COMPRESSLEVEL0 ... VNC_ENCODING_COMPRESSLEVEL0 + 9: vs->tight.compression = (enc & 0x0F); break; case VNC_ENCODING_QUALITYLEVEL0 ... VNC_ENCODING_QUALITYLEVEL0 + 9: if (vs->vd->lossy) { vs->tight.quality = (enc & 0x0F); } break; default: VNC_DEBUG("Unknown encoding: %d (0x%.8x): %d\n", i, enc, enc); break; } } vnc_desktop_resize(vs); check_pointer_type_change(&vs->mouse_mode_notifier, NULL); vnc_led_state_change(vs); } static void set_pixel_conversion(VncState *vs) { pixman_format_code_t fmt = qemu_pixman_get_format(&vs->client_pf); if (fmt == VNC_SERVER_FB_FORMAT) { vs->write_pixels = vnc_write_pixels_copy; vnc_hextile_set_pixel_conversion(vs, 0); } else { vs->write_pixels = vnc_write_pixels_generic; vnc_hextile_set_pixel_conversion(vs, 1); } } static void send_color_map(VncState *vs) { int i; vnc_write_u8(vs, VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES); vnc_write_u8(vs, 0); /* padding */ vnc_write_u16(vs, 0); /* first color */ vnc_write_u16(vs, 256); /* # of colors */ for (i = 0; i < 256; i++) { PixelFormat *pf = &vs->client_pf; vnc_write_u16(vs, (((i >> pf->rshift) & pf->rmax) << (16 - pf->rbits))); vnc_write_u16(vs, (((i >> pf->gshift) & pf->gmax) << (16 - pf->gbits))); vnc_write_u16(vs, (((i >> pf->bshift) & pf->bmax) << (16 - pf->bbits))); } } static void set_pixel_format(VncState *vs, int bits_per_pixel, int big_endian_flag, int true_color_flag, int red_max, int green_max, int blue_max, int red_shift, int green_shift, int blue_shift) { if (!true_color_flag) { /* Expose a reasonable default 256 color map */ bits_per_pixel = 8; red_max = 7; green_max = 7; blue_max = 3; red_shift = 0; green_shift = 3; blue_shift = 6; } switch (bits_per_pixel) { case 8: case 16: case 32: break; default: vnc_client_error(vs); return; } vs->client_pf.rmax = red_max ? red_max : 0xFF; vs->client_pf.rbits = hweight_long(red_max); vs->client_pf.rshift = red_shift; vs->client_pf.rmask = red_max << red_shift; vs->client_pf.gmax = green_max ? green_max : 0xFF; vs->client_pf.gbits = hweight_long(green_max); vs->client_pf.gshift = green_shift; vs->client_pf.gmask = green_max << green_shift; vs->client_pf.bmax = blue_max ? blue_max : 0xFF; vs->client_pf.bbits = hweight_long(blue_max); vs->client_pf.bshift = blue_shift; vs->client_pf.bmask = blue_max << blue_shift; vs->client_pf.bits_per_pixel = bits_per_pixel; vs->client_pf.bytes_per_pixel = bits_per_pixel / 8; vs->client_pf.depth = bits_per_pixel == 32 ? 24 : bits_per_pixel; vs->client_be = big_endian_flag; if (!true_color_flag) { send_color_map(vs); } set_pixel_conversion(vs); graphic_hw_invalidate(vs->vd->dcl.con); graphic_hw_update(vs->vd->dcl.con); } static void pixel_format_message (VncState *vs) { char pad[3] = { 0, 0, 0 }; vs->client_pf = qemu_default_pixelformat(32); vnc_write_u8(vs, vs->client_pf.bits_per_pixel); /* bits-per-pixel */ vnc_write_u8(vs, vs->client_pf.depth); /* depth */ #ifdef HOST_WORDS_BIGENDIAN vnc_write_u8(vs, 1); /* big-endian-flag */ #else vnc_write_u8(vs, 0); /* big-endian-flag */ #endif vnc_write_u8(vs, 1); /* true-color-flag */ vnc_write_u16(vs, vs->client_pf.rmax); /* red-max */ vnc_write_u16(vs, vs->client_pf.gmax); /* green-max */ vnc_write_u16(vs, vs->client_pf.bmax); /* blue-max */ vnc_write_u8(vs, vs->client_pf.rshift); /* red-shift */ vnc_write_u8(vs, vs->client_pf.gshift); /* green-shift */ vnc_write_u8(vs, vs->client_pf.bshift); /* blue-shift */ vnc_write(vs, pad, 3); /* padding */ vnc_hextile_set_pixel_conversion(vs, 0); vs->write_pixels = vnc_write_pixels_copy; } static void vnc_colordepth(VncState *vs) { if (vnc_has_feature(vs, VNC_FEATURE_WMVI)) { /* Sending a WMVi message to notify the client*/ vnc_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); vnc_write_u8(vs, 0); vnc_write_u16(vs, 1); /* number of rects */ vnc_framebuffer_update(vs, 0, 0, pixman_image_get_width(vs->vd->server), pixman_image_get_height(vs->vd->server), VNC_ENCODING_WMVi); pixel_format_message(vs); vnc_unlock_output(vs); vnc_flush(vs); } else { set_pixel_conversion(vs); } } static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len) { int i; uint16_t limit; VncDisplay *vd = vs->vd; if (data[0] > 3) { update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_BASE); } switch (data[0]) { case VNC_MSG_CLIENT_SET_PIXEL_FORMAT: if (len == 1) return 20; set_pixel_format(vs, read_u8(data, 4), read_u8(data, 6), read_u8(data, 7), read_u16(data, 8), read_u16(data, 10), read_u16(data, 12), read_u8(data, 14), read_u8(data, 15), read_u8(data, 16)); break; case VNC_MSG_CLIENT_SET_ENCODINGS: if (len == 1) return 4; if (len == 4) { limit = read_u16(data, 2); if (limit > 0) return 4 + (limit * 4); } else limit = read_u16(data, 2); for (i = 0; i < limit; i++) { int32_t val = read_s32(data, 4 + (i * 4)); memcpy(data + 4 + (i * 4), &val, sizeof(val)); } set_encodings(vs, (int32_t *)(data + 4), limit); break; case VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST: if (len == 1) return 10; framebuffer_update_request(vs, read_u8(data, 1), read_u16(data, 2), read_u16(data, 4), read_u16(data, 6), read_u16(data, 8)); break; case VNC_MSG_CLIENT_KEY_EVENT: if (len == 1) return 8; key_event(vs, read_u8(data, 1), read_u32(data, 4)); break; case VNC_MSG_CLIENT_POINTER_EVENT: if (len == 1) return 6; pointer_event(vs, read_u8(data, 1), read_u16(data, 2), read_u16(data, 4)); break; case VNC_MSG_CLIENT_CUT_TEXT: if (len == 1) { return 8; } if (len == 8) { uint32_t dlen = read_u32(data, 4); if (dlen > (1 << 20)) { error_report("vnc: client_cut_text msg payload has %u bytes" " which exceeds our limit of 1MB.", dlen); vnc_client_error(vs); break; } if (dlen > 0) { return 8 + dlen; } } client_cut_text(vs, read_u32(data, 4), data + 8); break; case VNC_MSG_CLIENT_QEMU: if (len == 1) return 2; switch (read_u8(data, 1)) { case VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT: if (len == 2) return 12; ext_key_event(vs, read_u16(data, 2), read_u32(data, 4), read_u32(data, 8)); break; case VNC_MSG_CLIENT_QEMU_AUDIO: if (len == 2) return 4; switch (read_u16 (data, 2)) { case VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE: audio_add(vs); break; case VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE: audio_del(vs); break; case VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT: if (len == 4) return 10; switch (read_u8(data, 4)) { case 0: vs->as.fmt = AUD_FMT_U8; break; case 1: vs->as.fmt = AUD_FMT_S8; break; case 2: vs->as.fmt = AUD_FMT_U16; break; case 3: vs->as.fmt = AUD_FMT_S16; break; case 4: vs->as.fmt = AUD_FMT_U32; break; case 5: vs->as.fmt = AUD_FMT_S32; break; default: VNC_DEBUG("Invalid audio format %d\n", read_u8(data, 4)); vnc_client_error(vs); break; } vs->as.nchannels = read_u8(data, 5); if (vs->as.nchannels != 1 && vs->as.nchannels != 2) { VNC_DEBUG("Invalid audio channel coount %d\n", read_u8(data, 5)); vnc_client_error(vs); break; } vs->as.freq = read_u32(data, 6); break; default: VNC_DEBUG("Invalid audio message %d\n", read_u8(data, 4)); vnc_client_error(vs); break; } break; default: VNC_DEBUG("Msg: %d\n", read_u16(data, 0)); vnc_client_error(vs); break; } break; default: VNC_DEBUG("Msg: %d\n", data[0]); vnc_client_error(vs); break; } vnc_read_when(vs, protocol_client_msg, 1); return 0; } static int protocol_client_init(VncState *vs, uint8_t *data, size_t len) { char buf[1024]; VncShareMode mode; int size; mode = data[0] ? VNC_SHARE_MODE_SHARED : VNC_SHARE_MODE_EXCLUSIVE; switch (vs->vd->share_policy) { case VNC_SHARE_POLICY_IGNORE: /* * Ignore the shared flag. Nothing to do here. * * Doesn't conform to the rfb spec but is traditional qemu * behavior, thus left here as option for compatibility * reasons. */ break; case VNC_SHARE_POLICY_ALLOW_EXCLUSIVE: /* * Policy: Allow clients ask for exclusive access. * * Implementation: When a client asks for exclusive access, * disconnect all others. Shared connects are allowed as long * as no exclusive connection exists. * * This is how the rfb spec suggests to handle the shared flag. */ if (mode == VNC_SHARE_MODE_EXCLUSIVE) { VncState *client; QTAILQ_FOREACH(client, &vs->vd->clients, next) { if (vs == client) { continue; } if (client->share_mode != VNC_SHARE_MODE_EXCLUSIVE && client->share_mode != VNC_SHARE_MODE_SHARED) { continue; } vnc_disconnect_start(client); } } if (mode == VNC_SHARE_MODE_SHARED) { if (vs->vd->num_exclusive > 0) { vnc_disconnect_start(vs); return 0; } } break; case VNC_SHARE_POLICY_FORCE_SHARED: /* * Policy: Shared connects only. * Implementation: Disallow clients asking for exclusive access. * * Useful for shared desktop sessions where you don't want * someone forgetting to say -shared when running the vnc * client disconnect everybody else. */ if (mode == VNC_SHARE_MODE_EXCLUSIVE) { vnc_disconnect_start(vs); return 0; } break; } vnc_set_share_mode(vs, mode); if (vs->vd->num_shared > vs->vd->connections_limit) { vnc_disconnect_start(vs); return 0; } vs->client_width = pixman_image_get_width(vs->vd->server); vs->client_height = pixman_image_get_height(vs->vd->server); vnc_write_u16(vs, vs->client_width); vnc_write_u16(vs, vs->client_height); pixel_format_message(vs); if (qemu_name) { size = snprintf(buf, sizeof(buf), "QEMU (%s)", qemu_name); if (size > sizeof(buf)) { size = sizeof(buf); } } else { size = snprintf(buf, sizeof(buf), "QEMU"); } vnc_write_u32(vs, size); vnc_write(vs, buf, size); vnc_flush(vs); vnc_client_cache_auth(vs); vnc_qmp_event(vs, QAPI_EVENT_VNC_INITIALIZED); vnc_read_when(vs, protocol_client_msg, 1); return 0; } void start_client_init(VncState *vs) { vnc_read_when(vs, protocol_client_init, 1); } static void make_challenge(VncState *vs) { int i; srand(time(NULL)+getpid()+getpid()*987654+rand()); for (i = 0 ; i < sizeof(vs->challenge) ; i++) vs->challenge[i] = (int) (256.0*rand()/(RAND_MAX+1.0)); } static int protocol_client_auth_vnc(VncState *vs, uint8_t *data, size_t len) { unsigned char response[VNC_AUTH_CHALLENGE_SIZE]; size_t i, pwlen; unsigned char key[8]; time_t now = time(NULL); QCryptoCipher *cipher = NULL; Error *err = NULL; if (!vs->vd->password) { VNC_DEBUG("No password configured on server"); goto reject; } if (vs->vd->expires < now) { VNC_DEBUG("Password is expired"); goto reject; } memcpy(response, vs->challenge, VNC_AUTH_CHALLENGE_SIZE); /* Calculate the expected challenge response */ pwlen = strlen(vs->vd->password); for (i=0; i<sizeof(key); i++) key[i] = i<pwlen ? vs->vd->password[i] : 0; cipher = qcrypto_cipher_new( QCRYPTO_CIPHER_ALG_DES_RFB, QCRYPTO_CIPHER_MODE_ECB, key, G_N_ELEMENTS(key), &err); if (!cipher) { VNC_DEBUG("Cannot initialize cipher %s", error_get_pretty(err)); error_free(err); goto reject; } if (qcrypto_cipher_encrypt(cipher, vs->challenge, response, VNC_AUTH_CHALLENGE_SIZE, &err) < 0) { VNC_DEBUG("Cannot encrypt challenge %s", error_get_pretty(err)); error_free(err); goto reject; } /* Compare expected vs actual challenge response */ if (memcmp(response, data, VNC_AUTH_CHALLENGE_SIZE) != 0) { VNC_DEBUG("Client challenge response did not match\n"); goto reject; } else { VNC_DEBUG("Accepting VNC challenge response\n"); vnc_write_u32(vs, 0); /* Accept auth */ vnc_flush(vs); start_client_init(vs); } qcrypto_cipher_free(cipher); return 0; reject: vnc_write_u32(vs, 1); /* Reject auth */ if (vs->minor >= 8) { static const char err[] = "Authentication failed"; vnc_write_u32(vs, sizeof(err)); vnc_write(vs, err, sizeof(err)); } vnc_flush(vs); vnc_client_error(vs); qcrypto_cipher_free(cipher); return 0; } void start_auth_vnc(VncState *vs) { make_challenge(vs); /* Send client a 'random' challenge */ vnc_write(vs, vs->challenge, sizeof(vs->challenge)); vnc_flush(vs); vnc_read_when(vs, protocol_client_auth_vnc, sizeof(vs->challenge)); } static int protocol_client_auth(VncState *vs, uint8_t *data, size_t len) { /* We only advertise 1 auth scheme at a time, so client * must pick the one we sent. Verify this */ if (data[0] != vs->auth) { /* Reject auth */ VNC_DEBUG("Reject auth %d because it didn't match advertized\n", (int)data[0]); vnc_write_u32(vs, 1); if (vs->minor >= 8) { static const char err[] = "Authentication failed"; vnc_write_u32(vs, sizeof(err)); vnc_write(vs, err, sizeof(err)); } vnc_client_error(vs); } else { /* Accept requested auth */ VNC_DEBUG("Client requested auth %d\n", (int)data[0]); switch (vs->auth) { case VNC_AUTH_NONE: VNC_DEBUG("Accept auth none\n"); if (vs->minor >= 8) { vnc_write_u32(vs, 0); /* Accept auth completion */ vnc_flush(vs); } start_client_init(vs); break; case VNC_AUTH_VNC: VNC_DEBUG("Start VNC auth\n"); start_auth_vnc(vs); break; case VNC_AUTH_VENCRYPT: VNC_DEBUG("Accept VeNCrypt auth\n"); start_auth_vencrypt(vs); break; #ifdef CONFIG_VNC_SASL case VNC_AUTH_SASL: VNC_DEBUG("Accept SASL auth\n"); start_auth_sasl(vs); break; #endif /* CONFIG_VNC_SASL */ default: /* Should not be possible, but just in case */ VNC_DEBUG("Reject auth %d server code bug\n", vs->auth); vnc_write_u8(vs, 1); if (vs->minor >= 8) { static const char err[] = "Authentication failed"; vnc_write_u32(vs, sizeof(err)); vnc_write(vs, err, sizeof(err)); } vnc_client_error(vs); } } return 0; } static int protocol_version(VncState *vs, uint8_t *version, size_t len) { char local[13]; memcpy(local, version, 12); local[12] = 0; if (sscanf(local, "RFB %03d.%03d\n", &vs->major, &vs->minor) != 2) { VNC_DEBUG("Malformed protocol version %s\n", local); vnc_client_error(vs); return 0; } VNC_DEBUG("Client request protocol version %d.%d\n", vs->major, vs->minor); if (vs->major != 3 || (vs->minor != 3 && vs->minor != 4 && vs->minor != 5 && vs->minor != 7 && vs->minor != 8)) { VNC_DEBUG("Unsupported client version\n"); vnc_write_u32(vs, VNC_AUTH_INVALID); vnc_flush(vs); vnc_client_error(vs); return 0; } /* Some broken clients report v3.4 or v3.5, which spec requires to be treated * as equivalent to v3.3 by servers */ if (vs->minor == 4 || vs->minor == 5) vs->minor = 3; if (vs->minor == 3) { if (vs->auth == VNC_AUTH_NONE) { VNC_DEBUG("Tell client auth none\n"); vnc_write_u32(vs, vs->auth); vnc_flush(vs); start_client_init(vs); } else if (vs->auth == VNC_AUTH_VNC) { VNC_DEBUG("Tell client VNC auth\n"); vnc_write_u32(vs, vs->auth); vnc_flush(vs); start_auth_vnc(vs); } else { VNC_DEBUG("Unsupported auth %d for protocol 3.3\n", vs->auth); vnc_write_u32(vs, VNC_AUTH_INVALID); vnc_flush(vs); vnc_client_error(vs); } } else { VNC_DEBUG("Telling client we support auth %d\n", vs->auth); vnc_write_u8(vs, 1); /* num auth */ vnc_write_u8(vs, vs->auth); vnc_read_when(vs, protocol_client_auth, 1); vnc_flush(vs); } return 0; } static VncRectStat *vnc_stat_rect(VncDisplay *vd, int x, int y) { struct VncSurface *vs = &vd->guest; return &vs->stats[y / VNC_STAT_RECT][x / VNC_STAT_RECT]; } void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h) { int i, j; w = (x + w) / VNC_STAT_RECT; h = (y + h) / VNC_STAT_RECT; x /= VNC_STAT_RECT; y /= VNC_STAT_RECT; for (j = y; j <= h; j++) { for (i = x; i <= w; i++) { vs->lossy_rect[j][i] = 1; } } } static int vnc_refresh_lossy_rect(VncDisplay *vd, int x, int y) { VncState *vs; int sty = y / VNC_STAT_RECT; int stx = x / VNC_STAT_RECT; int has_dirty = 0; y = y / VNC_STAT_RECT * VNC_STAT_RECT; x = x / VNC_STAT_RECT * VNC_STAT_RECT; QTAILQ_FOREACH(vs, &vd->clients, next) { int j; /* kernel send buffers are full -> refresh later */ if (vs->output.offset) { continue; } if (!vs->lossy_rect[sty][stx]) { continue; } vs->lossy_rect[sty][stx] = 0; for (j = 0; j < VNC_STAT_RECT; ++j) { bitmap_set(vs->dirty[y + j], x / VNC_DIRTY_PIXELS_PER_BIT, VNC_STAT_RECT / VNC_DIRTY_PIXELS_PER_BIT); } has_dirty++; } return has_dirty; } static int vnc_update_stats(VncDisplay *vd, struct timeval * tv) { int width = MIN(pixman_image_get_width(vd->guest.fb), pixman_image_get_width(vd->server)); int height = MIN(pixman_image_get_height(vd->guest.fb), pixman_image_get_height(vd->server)); int x, y; struct timeval res; int has_dirty = 0; for (y = 0; y < height; y += VNC_STAT_RECT) { for (x = 0; x < width; x += VNC_STAT_RECT) { VncRectStat *rect = vnc_stat_rect(vd, x, y); rect->updated = false; } } qemu_timersub(tv, &VNC_REFRESH_STATS, &res); if (timercmp(&vd->guest.last_freq_check, &res, >)) { return has_dirty; } vd->guest.last_freq_check = *tv; for (y = 0; y < height; y += VNC_STAT_RECT) { for (x = 0; x < width; x += VNC_STAT_RECT) { VncRectStat *rect= vnc_stat_rect(vd, x, y); int count = ARRAY_SIZE(rect->times); struct timeval min, max; if (!timerisset(&rect->times[count - 1])) { continue ; } max = rect->times[(rect->idx + count - 1) % count]; qemu_timersub(tv, &max, &res); if (timercmp(&res, &VNC_REFRESH_LOSSY, >)) { rect->freq = 0; has_dirty += vnc_refresh_lossy_rect(vd, x, y); memset(rect->times, 0, sizeof (rect->times)); continue ; } min = rect->times[rect->idx]; max = rect->times[(rect->idx + count - 1) % count]; qemu_timersub(&max, &min, &res); rect->freq = res.tv_sec + res.tv_usec / 1000000.; rect->freq /= count; rect->freq = 1. / rect->freq; } } return has_dirty; } double vnc_update_freq(VncState *vs, int x, int y, int w, int h) { int i, j; double total = 0; int num = 0; x = (x / VNC_STAT_RECT) * VNC_STAT_RECT; y = (y / VNC_STAT_RECT) * VNC_STAT_RECT; for (j = y; j <= y + h; j += VNC_STAT_RECT) { for (i = x; i <= x + w; i += VNC_STAT_RECT) { total += vnc_stat_rect(vs->vd, i, j)->freq; num++; } } if (num) { return total / num; } else { return 0; } } static void vnc_rect_updated(VncDisplay *vd, int x, int y, struct timeval * tv) { VncRectStat *rect; rect = vnc_stat_rect(vd, x, y); if (rect->updated) { return ; } rect->times[rect->idx] = *tv; rect->idx = (rect->idx + 1) % ARRAY_SIZE(rect->times); rect->updated = true; } static int vnc_refresh_server_surface(VncDisplay *vd) { int width = MIN(pixman_image_get_width(vd->guest.fb), pixman_image_get_width(vd->server)); int height = MIN(pixman_image_get_height(vd->guest.fb), pixman_image_get_height(vd->server)); int cmp_bytes, server_stride, line_bytes, guest_ll, guest_stride, y = 0; uint8_t *guest_row0 = NULL, *server_row0; VncState *vs; int has_dirty = 0; pixman_image_t *tmpbuf = NULL; struct timeval tv = { 0, 0 }; if (!vd->non_adaptive) { gettimeofday(&tv, NULL); has_dirty = vnc_update_stats(vd, &tv); } /* * Walk through the guest dirty map. * Check and copy modified bits from guest to server surface. * Update server dirty map. */ server_row0 = (uint8_t *)pixman_image_get_data(vd->server); server_stride = guest_stride = guest_ll = pixman_image_get_stride(vd->server); cmp_bytes = MIN(VNC_DIRTY_PIXELS_PER_BIT * VNC_SERVER_FB_BYTES, server_stride); if (vd->guest.format != VNC_SERVER_FB_FORMAT) { int width = pixman_image_get_width(vd->server); tmpbuf = qemu_pixman_linebuf_create(VNC_SERVER_FB_FORMAT, width); } else { int guest_bpp = PIXMAN_FORMAT_BPP(pixman_image_get_format(vd->guest.fb)); guest_row0 = (uint8_t *)pixman_image_get_data(vd->guest.fb); guest_stride = pixman_image_get_stride(vd->guest.fb); guest_ll = pixman_image_get_width(vd->guest.fb) * ((guest_bpp + 7) / 8); } line_bytes = MIN(server_stride, guest_ll); for (;;) { int x; uint8_t *guest_ptr, *server_ptr; unsigned long offset = find_next_bit((unsigned long *) &vd->guest.dirty, height * VNC_DIRTY_BPL(&vd->guest), y * VNC_DIRTY_BPL(&vd->guest)); if (offset == height * VNC_DIRTY_BPL(&vd->guest)) { /* no more dirty bits */ break; } y = offset / VNC_DIRTY_BPL(&vd->guest); x = offset % VNC_DIRTY_BPL(&vd->guest); server_ptr = server_row0 + y * server_stride + x * cmp_bytes; if (vd->guest.format != VNC_SERVER_FB_FORMAT) { qemu_pixman_linebuf_fill(tmpbuf, vd->guest.fb, width, 0, y); guest_ptr = (uint8_t *)pixman_image_get_data(tmpbuf); } else { guest_ptr = guest_row0 + y * guest_stride; } guest_ptr += x * cmp_bytes; for (; x < DIV_ROUND_UP(width, VNC_DIRTY_PIXELS_PER_BIT); x++, guest_ptr += cmp_bytes, server_ptr += cmp_bytes) { int _cmp_bytes = cmp_bytes; if (!test_and_clear_bit(x, vd->guest.dirty[y])) { continue; } if ((x + 1) * cmp_bytes > line_bytes) { _cmp_bytes = line_bytes - x * cmp_bytes; } assert(_cmp_bytes >= 0); if (memcmp(server_ptr, guest_ptr, _cmp_bytes) == 0) { continue; } memcpy(server_ptr, guest_ptr, _cmp_bytes); if (!vd->non_adaptive) { vnc_rect_updated(vd, x * VNC_DIRTY_PIXELS_PER_BIT, y, &tv); } QTAILQ_FOREACH(vs, &vd->clients, next) { set_bit(x, vs->dirty[y]); } has_dirty++; } y++; } qemu_pixman_image_unref(tmpbuf); return has_dirty; } static void vnc_refresh(DisplayChangeListener *dcl) { VncDisplay *vd = container_of(dcl, VncDisplay, dcl); VncState *vs, *vn; int has_dirty, rects = 0; if (QTAILQ_EMPTY(&vd->clients)) { update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_MAX); return; } graphic_hw_update(vd->dcl.con); if (vnc_trylock_display(vd)) { update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_BASE); return; } has_dirty = vnc_refresh_server_surface(vd); vnc_unlock_display(vd); QTAILQ_FOREACH_SAFE(vs, &vd->clients, next, vn) { rects += vnc_update_client(vs, has_dirty, false); /* vs might be free()ed here */ } if (has_dirty && rects) { vd->dcl.update_interval /= 2; if (vd->dcl.update_interval < VNC_REFRESH_INTERVAL_BASE) { vd->dcl.update_interval = VNC_REFRESH_INTERVAL_BASE; } } else { vd->dcl.update_interval += VNC_REFRESH_INTERVAL_INC; if (vd->dcl.update_interval > VNC_REFRESH_INTERVAL_MAX) { vd->dcl.update_interval = VNC_REFRESH_INTERVAL_MAX; } } } static void vnc_connect(VncDisplay *vd, QIOChannelSocket *sioc, bool skipauth, bool websocket) { VncState *vs = g_new0(VncState, 1); bool first_client = QTAILQ_EMPTY(&vd->clients); int i; vs->sioc = sioc; object_ref(OBJECT(vs->sioc)); vs->ioc = QIO_CHANNEL(sioc); object_ref(OBJECT(vs->ioc)); vs->vd = vd; buffer_init(&vs->input, "vnc-input/%p", sioc); buffer_init(&vs->output, "vnc-output/%p", sioc); buffer_init(&vs->jobs_buffer, "vnc-jobs_buffer/%p", sioc); buffer_init(&vs->tight.tight, "vnc-tight/%p", sioc); buffer_init(&vs->tight.zlib, "vnc-tight-zlib/%p", sioc); buffer_init(&vs->tight.gradient, "vnc-tight-gradient/%p", sioc); #ifdef CONFIG_VNC_JPEG buffer_init(&vs->tight.jpeg, "vnc-tight-jpeg/%p", sioc); #endif #ifdef CONFIG_VNC_PNG buffer_init(&vs->tight.png, "vnc-tight-png/%p", sioc); #endif buffer_init(&vs->zlib.zlib, "vnc-zlib/%p", sioc); buffer_init(&vs->zrle.zrle, "vnc-zrle/%p", sioc); buffer_init(&vs->zrle.fb, "vnc-zrle-fb/%p", sioc); buffer_init(&vs->zrle.zlib, "vnc-zrle-zlib/%p", sioc); if (skipauth) { vs->auth = VNC_AUTH_NONE; vs->subauth = VNC_AUTH_INVALID; } else { if (websocket) { vs->auth = vd->ws_auth; vs->subauth = VNC_AUTH_INVALID; } else { vs->auth = vd->auth; vs->subauth = vd->subauth; } } VNC_DEBUG("Client sioc=%p ws=%d auth=%d subauth=%d\n", sioc, websocket, vs->auth, vs->subauth); vs->lossy_rect = g_malloc0(VNC_STAT_ROWS * sizeof (*vs->lossy_rect)); for (i = 0; i < VNC_STAT_ROWS; ++i) { vs->lossy_rect[i] = g_new0(uint8_t, VNC_STAT_COLS); } VNC_DEBUG("New client on socket %p\n", vs->sioc); update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_BASE); qio_channel_set_blocking(vs->ioc, false, NULL); if (websocket) { vs->websocket = 1; if (vd->tlscreds) { vs->ioc_tag = qio_channel_add_watch( vs->ioc, G_IO_IN, vncws_tls_handshake_io, vs, NULL); } else { vs->ioc_tag = qio_channel_add_watch( vs->ioc, G_IO_IN, vncws_handshake_io, vs, NULL); } } else { vs->ioc_tag = qio_channel_add_watch( vs->ioc, G_IO_IN, vnc_client_io, vs, NULL); } vnc_client_cache_addr(vs); vnc_qmp_event(vs, QAPI_EVENT_VNC_CONNECTED); vnc_set_share_mode(vs, VNC_SHARE_MODE_CONNECTING); vs->last_x = -1; vs->last_y = -1; vs->as.freq = 44100; vs->as.nchannels = 2; vs->as.fmt = AUD_FMT_S16; vs->as.endianness = 0; qemu_mutex_init(&vs->output_mutex); vs->bh = qemu_bh_new(vnc_jobs_bh, vs); QTAILQ_INSERT_TAIL(&vd->clients, vs, next); if (first_client) { vnc_update_server_surface(vd); } graphic_hw_update(vd->dcl.con); if (!vs->websocket) { vnc_start_protocol(vs); } if (vd->num_connecting > vd->connections_limit) { QTAILQ_FOREACH(vs, &vd->clients, next) { if (vs->share_mode == VNC_SHARE_MODE_CONNECTING) { vnc_disconnect_start(vs); return; } } } } void vnc_start_protocol(VncState *vs) { vnc_write(vs, "RFB 003.008\n", 12); vnc_flush(vs); vnc_read_when(vs, protocol_version, 12); vs->mouse_mode_notifier.notify = check_pointer_type_change; qemu_add_mouse_mode_change_notifier(&vs->mouse_mode_notifier); } static gboolean vnc_listen_io(QIOChannel *ioc, GIOCondition condition, void *opaque) { VncDisplay *vd = opaque; QIOChannelSocket *sioc = NULL; Error *err = NULL; bool isWebsock = false; size_t i; for (i = 0; i < vd->nlwebsock; i++) { if (ioc == QIO_CHANNEL(vd->lwebsock[i])) { isWebsock = true; break; } } sioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(ioc), &err); if (sioc != NULL) { qio_channel_set_name(QIO_CHANNEL(sioc), isWebsock ? "vnc-ws-server" : "vnc-server"); qio_channel_set_delay(QIO_CHANNEL(sioc), false); vnc_connect(vd, sioc, false, isWebsock); object_unref(OBJECT(sioc)); } else { /* client probably closed connection before we got there */ error_free(err); } return TRUE; } static const DisplayChangeListenerOps dcl_ops = { .dpy_name = "vnc", .dpy_refresh = vnc_refresh, .dpy_gfx_copy = vnc_dpy_copy, .dpy_gfx_update = vnc_dpy_update, .dpy_gfx_switch = vnc_dpy_switch, .dpy_gfx_check_format = qemu_pixman_check_format, .dpy_mouse_set = vnc_mouse_set, .dpy_cursor_define = vnc_dpy_cursor_define, }; void vnc_display_init(const char *id) { VncDisplay *vd; if (vnc_display_find(id) != NULL) { return; } vd = g_malloc0(sizeof(*vd)); vd->id = strdup(id); QTAILQ_INSERT_TAIL(&vnc_displays, vd, next); QTAILQ_INIT(&vd->clients); vd->expires = TIME_MAX; if (keyboard_layout) { trace_vnc_key_map_init(keyboard_layout); vd->kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout); } else { vd->kbd_layout = init_keyboard_layout(name2keysym, "en-us"); } if (!vd->kbd_layout) { exit(1); } vd->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE; vd->connections_limit = 32; qemu_mutex_init(&vd->mutex); vnc_start_worker_thread(); vd->dcl.ops = &dcl_ops; register_displaychangelistener(&vd->dcl); } static void vnc_display_close(VncDisplay *vd) { size_t i; if (!vd) { return; } vd->is_unix = false; for (i = 0; i < vd->nlsock; i++) { if (vd->lsock_tag[i]) { g_source_remove(vd->lsock_tag[i]); } object_unref(OBJECT(vd->lsock[i])); } g_free(vd->lsock); g_free(vd->lsock_tag); vd->lsock = NULL; vd->nlsock = 0; for (i = 0; i < vd->nlwebsock; i++) { if (vd->lwebsock_tag[i]) { g_source_remove(vd->lwebsock_tag[i]); } object_unref(OBJECT(vd->lwebsock[i])); } g_free(vd->lwebsock); g_free(vd->lwebsock_tag); vd->lwebsock = NULL; vd->nlwebsock = 0; vd->auth = VNC_AUTH_INVALID; vd->subauth = VNC_AUTH_INVALID; if (vd->tlscreds) { object_unparent(OBJECT(vd->tlscreds)); vd->tlscreds = NULL; } g_free(vd->tlsaclname); vd->tlsaclname = NULL; if (vd->lock_key_sync) { qemu_remove_led_event_handler(vd->led); } } int vnc_display_password(const char *id, const char *password) { VncDisplay *vd = vnc_display_find(id); if (!vd) { return -EINVAL; } if (vd->auth == VNC_AUTH_NONE) { error_printf_unless_qmp("If you want use passwords please enable " "password auth using '-vnc ${dpy},password'.\n"); return -EINVAL; } g_free(vd->password); vd->password = g_strdup(password); return 0; } int vnc_display_pw_expire(const char *id, time_t expires) { VncDisplay *vd = vnc_display_find(id); if (!vd) { return -EINVAL; } vd->expires = expires; return 0; } static void vnc_display_print_local_addr(VncDisplay *vd) { SocketAddress *addr; Error *err = NULL; if (!vd->nlsock) { return; } addr = qio_channel_socket_get_local_address(vd->lsock[0], &err); if (!addr) { return; } if (addr->type != SOCKET_ADDRESS_KIND_INET) { qapi_free_SocketAddress(addr); return; } error_printf_unless_qmp("VNC server running on %s:%s\n", addr->u.inet.data->host, addr->u.inet.data->port); qapi_free_SocketAddress(addr); } static QemuOptsList qemu_vnc_opts = { .name = "vnc", .head = QTAILQ_HEAD_INITIALIZER(qemu_vnc_opts.head), .implied_opt_name = "vnc", .desc = { { .name = "vnc", .type = QEMU_OPT_STRING, },{ .name = "websocket", .type = QEMU_OPT_STRING, },{ .name = "tls-creds", .type = QEMU_OPT_STRING, },{ /* Deprecated in favour of tls-creds */ .name = "x509", .type = QEMU_OPT_STRING, },{ .name = "share", .type = QEMU_OPT_STRING, },{ .name = "display", .type = QEMU_OPT_STRING, },{ .name = "head", .type = QEMU_OPT_NUMBER, },{ .name = "connections", .type = QEMU_OPT_NUMBER, },{ .name = "to", .type = QEMU_OPT_NUMBER, },{ .name = "ipv4", .type = QEMU_OPT_BOOL, },{ .name = "ipv6", .type = QEMU_OPT_BOOL, },{ .name = "password", .type = QEMU_OPT_BOOL, },{ .name = "reverse", .type = QEMU_OPT_BOOL, },{ .name = "lock-key-sync", .type = QEMU_OPT_BOOL, },{ .name = "key-delay-ms", .type = QEMU_OPT_NUMBER, },{ .name = "sasl", .type = QEMU_OPT_BOOL, },{ /* Deprecated in favour of tls-creds */ .name = "tls", .type = QEMU_OPT_BOOL, },{ /* Deprecated in favour of tls-creds */ .name = "x509verify", .type = QEMU_OPT_STRING, },{ .name = "acl", .type = QEMU_OPT_BOOL, },{ .name = "lossy", .type = QEMU_OPT_BOOL, },{ .name = "non-adaptive", .type = QEMU_OPT_BOOL, }, { /* end of list */ } }, }; static int vnc_display_setup_auth(int *auth, int *subauth, QCryptoTLSCreds *tlscreds, bool password, bool sasl, bool websocket, Error **errp) { /* * We have a choice of 3 authentication options * * 1. none * 2. vnc * 3. sasl * * The channel can be run in 2 modes * * 1. clear * 2. tls * * And TLS can use 2 types of credentials * * 1. anon * 2. x509 * * We thus have 9 possible logical combinations * * 1. clear + none * 2. clear + vnc * 3. clear + sasl * 4. tls + anon + none * 5. tls + anon + vnc * 6. tls + anon + sasl * 7. tls + x509 + none * 8. tls + x509 + vnc * 9. tls + x509 + sasl * * These need to be mapped into the VNC auth schemes * in an appropriate manner. In regular VNC, all the * TLS options get mapped into VNC_AUTH_VENCRYPT * sub-auth types. * * In websockets, the https:// protocol already provides * TLS support, so there is no need to make use of the * VeNCrypt extension. Furthermore, websockets browser * clients could not use VeNCrypt even if they wanted to, * as they cannot control when the TLS handshake takes * place. Thus there is no option but to rely on https://, * meaning combinations 4->6 and 7->9 will be mapped to * VNC auth schemes in the same way as combos 1->3. * * Regardless of fact that we have a different mapping to * VNC auth mechs for plain VNC vs websockets VNC, the end * result has the same security characteristics. */ if (websocket || !tlscreds) { if (password) { VNC_DEBUG("Initializing VNC server with password auth\n"); *auth = VNC_AUTH_VNC; } else if (sasl) { VNC_DEBUG("Initializing VNC server with SASL auth\n"); *auth = VNC_AUTH_SASL; } else { VNC_DEBUG("Initializing VNC server with no auth\n"); *auth = VNC_AUTH_NONE; } *subauth = VNC_AUTH_INVALID; } else { bool is_x509 = object_dynamic_cast(OBJECT(tlscreds), TYPE_QCRYPTO_TLS_CREDS_X509) != NULL; bool is_anon = object_dynamic_cast(OBJECT(tlscreds), TYPE_QCRYPTO_TLS_CREDS_ANON) != NULL; if (!is_x509 && !is_anon) { error_setg(errp, "Unsupported TLS cred type %s", object_get_typename(OBJECT(tlscreds))); return -1; } *auth = VNC_AUTH_VENCRYPT; if (password) { if (is_x509) { VNC_DEBUG("Initializing VNC server with x509 password auth\n"); *subauth = VNC_AUTH_VENCRYPT_X509VNC; } else { VNC_DEBUG("Initializing VNC server with TLS password auth\n"); *subauth = VNC_AUTH_VENCRYPT_TLSVNC; } } else if (sasl) { if (is_x509) { VNC_DEBUG("Initializing VNC server with x509 SASL auth\n"); *subauth = VNC_AUTH_VENCRYPT_X509SASL; } else { VNC_DEBUG("Initializing VNC server with TLS SASL auth\n"); *subauth = VNC_AUTH_VENCRYPT_TLSSASL; } } else { if (is_x509) { VNC_DEBUG("Initializing VNC server with x509 no auth\n"); *subauth = VNC_AUTH_VENCRYPT_X509NONE; } else { VNC_DEBUG("Initializing VNC server with TLS no auth\n"); *subauth = VNC_AUTH_VENCRYPT_TLSNONE; } } } return 0; } /* * Handle back compat with old CLI syntax by creating some * suitable QCryptoTLSCreds objects */ static QCryptoTLSCreds * vnc_display_create_creds(bool x509, bool x509verify, const char *dir, const char *id, Error **errp) { gchar *credsid = g_strdup_printf("tlsvnc%s", id); Object *parent = object_get_objects_root(); Object *creds; Error *err = NULL; if (x509) { creds = object_new_with_props(TYPE_QCRYPTO_TLS_CREDS_X509, parent, credsid, &err, "endpoint", "server", "dir", dir, "verify-peer", x509verify ? "yes" : "no", NULL); } else { creds = object_new_with_props(TYPE_QCRYPTO_TLS_CREDS_ANON, parent, credsid, &err, "endpoint", "server", NULL); } g_free(credsid); if (err) { error_propagate(errp, err); return NULL; } return QCRYPTO_TLS_CREDS(creds); } static int vnc_display_get_address(const char *addrstr, bool websocket, int displaynum, int to, bool has_ipv4, bool has_ipv6, bool ipv4, bool ipv6, SocketAddress **retaddr, Error **errp) { int ret = -1; SocketAddress *addr = NULL; addr = g_new0(SocketAddress, 1); if (strncmp(addrstr, "unix:", 5) == 0) { addr->type = SOCKET_ADDRESS_KIND_UNIX; addr->u.q_unix.data = g_new0(UnixSocketAddress, 1); addr->u.q_unix.data->path = g_strdup(addrstr + 5); if (websocket) { error_setg(errp, "UNIX sockets not supported with websock"); goto cleanup; } if (to) { error_setg(errp, "Port range not support with UNIX socket"); goto cleanup; } ret = 0; } else { const char *port; size_t hostlen; unsigned long long baseport = 0; InetSocketAddress *inet; port = strrchr(addrstr, ':'); if (!port) { if (websocket) { hostlen = 0; port = addrstr; } else { error_setg(errp, "no vnc port specified"); goto cleanup; } } else { hostlen = port - addrstr; port++; if (*port == '\0') { error_setg(errp, "vnc port cannot be empty"); goto cleanup; } } addr->type = SOCKET_ADDRESS_KIND_INET; inet = addr->u.inet.data = g_new0(InetSocketAddress, 1); if (addrstr[0] == '[' && addrstr[hostlen - 1] == ']') { inet->host = g_strndup(addrstr + 1, hostlen - 2); } else { inet->host = g_strndup(addrstr, hostlen); } /* plain VNC port is just an offset, for websocket * port is absolute */ if (websocket) { if (g_str_equal(addrstr, "") || g_str_equal(addrstr, "on")) { if (displaynum == -1) { error_setg(errp, "explicit websocket port is required"); goto cleanup; } inet->port = g_strdup_printf( "%d", displaynum + 5700); if (to) { inet->has_to = true; inet->to = to + 5700; } } else { inet->port = g_strdup(port); } } else { if (parse_uint_full(port, &baseport, 10) < 0) { error_setg(errp, "can't convert to a number: %s", port); goto cleanup; } if (baseport > 65535 || baseport + 5900 > 65535) { error_setg(errp, "port %s out of range", port); goto cleanup; } inet->port = g_strdup_printf( "%d", (int)baseport + 5900); if (to) { inet->has_to = true; inet->to = to + 5900; } } inet->ipv4 = ipv4; inet->has_ipv4 = has_ipv4; inet->ipv6 = ipv6; inet->has_ipv6 = has_ipv6; ret = baseport; } *retaddr = addr; cleanup: if (ret < 0) { qapi_free_SocketAddress(addr); } return ret; } static int vnc_display_get_addresses(QemuOpts *opts, SocketAddress ***retsaddr, size_t *retnsaddr, SocketAddress ***retwsaddr, size_t *retnwsaddr, Error **errp) { SocketAddress *saddr = NULL; SocketAddress *wsaddr = NULL; QemuOptsIter addriter; const char *addr; int to = qemu_opt_get_number(opts, "to", 0); bool has_ipv4 = qemu_opt_get(opts, "ipv4"); bool has_ipv6 = qemu_opt_get(opts, "ipv6"); bool ipv4 = qemu_opt_get_bool(opts, "ipv4", false); bool ipv6 = qemu_opt_get_bool(opts, "ipv6", false); size_t i; int displaynum = -1; int ret = -1; *retsaddr = NULL; *retnsaddr = 0; *retwsaddr = NULL; *retnwsaddr = 0; addr = qemu_opt_get(opts, "vnc"); if (addr == NULL || g_str_equal(addr, "none")) { ret = 0; goto cleanup; } if (qemu_opt_get(opts, "websocket") && !qcrypto_hash_supports(QCRYPTO_HASH_ALG_SHA1)) { error_setg(errp, "SHA1 hash support is required for websockets"); goto cleanup; } qemu_opt_iter_init(&addriter, opts, "vnc"); while ((addr = qemu_opt_iter_next(&addriter)) != NULL) { int rv; rv = vnc_display_get_address(addr, false, 0, to, has_ipv4, has_ipv6, ipv4, ipv6, &saddr, errp); if (rv < 0) { goto cleanup; } /* Historical compat - first listen address can be used * to set the default websocket port */ if (displaynum == -1) { displaynum = rv; } *retsaddr = g_renew(SocketAddress *, *retsaddr, *retnsaddr + 1); (*retsaddr)[(*retnsaddr)++] = saddr; } /* If we had multiple primary displays, we don't do defaults * for websocket, and require explicit config instead. */ if (*retnsaddr > 1) { displaynum = -1; } qemu_opt_iter_init(&addriter, opts, "websocket"); while ((addr = qemu_opt_iter_next(&addriter)) != NULL) { if (vnc_display_get_address(addr, true, displaynum, to, has_ipv4, has_ipv6, ipv4, ipv6, &wsaddr, errp) < 0) { goto cleanup; } /* Historical compat - if only a single listen address was * provided, then this is used to set the default listen * address for websocket too */ if (*retnsaddr == 1 && (*retsaddr)[0]->type == SOCKET_ADDRESS_KIND_INET && wsaddr->type == SOCKET_ADDRESS_KIND_INET && g_str_equal(wsaddr->u.inet.data->host, "") && !g_str_equal((*retsaddr)[0]->u.inet.data->host, "")) { g_free(wsaddr->u.inet.data->host); wsaddr->u.inet.data->host = g_strdup((*retsaddr)[0]->u.inet.data->host); } *retwsaddr = g_renew(SocketAddress *, *retwsaddr, *retnwsaddr + 1); (*retwsaddr)[(*retnwsaddr)++] = wsaddr; } ret = 0; cleanup: if (ret < 0) { for (i = 0; i < *retnsaddr; i++) { qapi_free_SocketAddress((*retsaddr)[i]); } g_free(*retsaddr); for (i = 0; i < *retnwsaddr; i++) { qapi_free_SocketAddress((*retwsaddr)[i]); } g_free(*retwsaddr); *retsaddr = *retwsaddr = NULL; *retnsaddr = *retnwsaddr = 0; } return ret; } static int vnc_display_connect(VncDisplay *vd, SocketAddress **saddr, size_t nsaddr, SocketAddress **wsaddr, size_t nwsaddr, Error **errp) { /* connect to viewer */ QIOChannelSocket *sioc = NULL; if (nwsaddr != 0) { error_setg(errp, "Cannot use websockets in reverse mode"); return -1; } if (nsaddr != 1) { error_setg(errp, "Expected a single address in reverse mode"); return -1; } vd->is_unix = saddr[0]->type == SOCKET_ADDRESS_KIND_UNIX; sioc = qio_channel_socket_new(); qio_channel_set_name(QIO_CHANNEL(sioc), "vnc-reverse"); if (qio_channel_socket_connect_sync(sioc, saddr[0], errp) < 0) { return -1; } vnc_connect(vd, sioc, false, false); object_unref(OBJECT(sioc)); return 0; } static int vnc_display_listen_addr(VncDisplay *vd, SocketAddress *addr, const char *name, QIOChannelSocket ***lsock, guint **lsock_tag, size_t *nlsock, Error **errp) { QIODNSResolver *resolver = qio_dns_resolver_get_instance(); SocketAddress **rawaddrs = NULL; size_t nrawaddrs = 0; Error *listenerr = NULL; bool listening = false; size_t i; if (qio_dns_resolver_lookup_sync(resolver, addr, &nrawaddrs, &rawaddrs, errp) < 0) { return -1; } for (i = 0; i < nrawaddrs; i++) { QIOChannelSocket *sioc = qio_channel_socket_new(); qio_channel_set_name(QIO_CHANNEL(sioc), name); if (qio_channel_socket_listen_sync( sioc, rawaddrs[i], listenerr == NULL ? &listenerr : NULL) < 0) { continue; } listening = true; (*nlsock)++; *lsock = g_renew(QIOChannelSocket *, *lsock, *nlsock); *lsock_tag = g_renew(guint, *lsock_tag, *nlsock); (*lsock)[*nlsock - 1] = sioc; (*lsock_tag)[*nlsock - 1] = 0; } for (i = 0; i < nrawaddrs; i++) { qapi_free_SocketAddress(rawaddrs[i]); } g_free(rawaddrs); if (listenerr) { if (!listening) { error_propagate(errp, listenerr); return -1; } else { error_free(listenerr); } } for (i = 0; i < *nlsock; i++) { (*lsock_tag)[i] = qio_channel_add_watch( QIO_CHANNEL((*lsock)[i]), G_IO_IN, vnc_listen_io, vd, NULL); } return 0; } static int vnc_display_listen(VncDisplay *vd, SocketAddress **saddr, size_t nsaddr, SocketAddress **wsaddr, size_t nwsaddr, Error **errp) { size_t i; for (i = 0; i < nsaddr; i++) { if (vnc_display_listen_addr(vd, saddr[i], "vnc-listen", &vd->lsock, &vd->lsock_tag, &vd->nlsock, errp) < 0) { return -1; } } for (i = 0; i < nwsaddr; i++) { if (vnc_display_listen_addr(vd, wsaddr[i], "vnc-ws-listen", &vd->lwebsock, &vd->lwebsock_tag, &vd->nlwebsock, errp) < 0) { return -1; } } return 0; } void vnc_display_open(const char *id, Error **errp) { VncDisplay *vd = vnc_display_find(id); QemuOpts *opts = qemu_opts_find(&qemu_vnc_opts, id); SocketAddress **saddr = NULL, **wsaddr = NULL; size_t nsaddr, nwsaddr; const char *share, *device_id; QemuConsole *con; bool password = false; bool reverse = false; const char *credid; bool sasl = false; #ifdef CONFIG_VNC_SASL int saslErr; #endif int acl = 0; int lock_key_sync = 1; int key_delay_ms; size_t i; if (!vd) { error_setg(errp, "VNC display not active"); return; } vnc_display_close(vd); if (!opts) { return; } if (vnc_display_get_addresses(opts, &saddr, &nsaddr, &wsaddr, &nwsaddr, errp) < 0) { goto fail; } if (saddr == NULL) { return; } password = qemu_opt_get_bool(opts, "password", false); if (password) { if (fips_get_state()) { error_setg(errp, "VNC password auth disabled due to FIPS mode, " "consider using the VeNCrypt or SASL authentication " "methods as an alternative"); goto fail; } if (!qcrypto_cipher_supports( QCRYPTO_CIPHER_ALG_DES_RFB, QCRYPTO_CIPHER_MODE_ECB)) { error_setg(errp, "Cipher backend does not support DES RFB algorithm"); goto fail; } } reverse = qemu_opt_get_bool(opts, "reverse", false); lock_key_sync = qemu_opt_get_bool(opts, "lock-key-sync", true); key_delay_ms = qemu_opt_get_number(opts, "key-delay-ms", 1); sasl = qemu_opt_get_bool(opts, "sasl", false); #ifndef CONFIG_VNC_SASL if (sasl) { error_setg(errp, "VNC SASL auth requires cyrus-sasl support"); goto fail; } #endif /* CONFIG_VNC_SASL */ credid = qemu_opt_get(opts, "tls-creds"); if (credid) { Object *creds; if (qemu_opt_get(opts, "tls") || qemu_opt_get(opts, "x509") || qemu_opt_get(opts, "x509verify")) { error_setg(errp, "'tls-creds' parameter is mutually exclusive with " "'tls', 'x509' and 'x509verify' parameters"); goto fail; } creds = object_resolve_path_component( object_get_objects_root(), credid); if (!creds) { error_setg(errp, "No TLS credentials with id '%s'", credid); goto fail; } vd->tlscreds = (QCryptoTLSCreds *) object_dynamic_cast(creds, TYPE_QCRYPTO_TLS_CREDS); if (!vd->tlscreds) { error_setg(errp, "Object with id '%s' is not TLS credentials", credid); goto fail; } object_ref(OBJECT(vd->tlscreds)); if (vd->tlscreds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { error_setg(errp, "Expecting TLS credentials with a server endpoint"); goto fail; } } else { const char *path; bool tls = false, x509 = false, x509verify = false; tls = qemu_opt_get_bool(opts, "tls", false); if (tls) { path = qemu_opt_get(opts, "x509"); if (path) { x509 = true; } else { path = qemu_opt_get(opts, "x509verify"); if (path) { x509 = true; x509verify = true; } } vd->tlscreds = vnc_display_create_creds(x509, x509verify, path, vd->id, errp); if (!vd->tlscreds) { goto fail; } } } acl = qemu_opt_get_bool(opts, "acl", false); share = qemu_opt_get(opts, "share"); if (share) { if (strcmp(share, "ignore") == 0) { vd->share_policy = VNC_SHARE_POLICY_IGNORE; } else if (strcmp(share, "allow-exclusive") == 0) { vd->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE; } else if (strcmp(share, "force-shared") == 0) { vd->share_policy = VNC_SHARE_POLICY_FORCE_SHARED; } else { error_setg(errp, "unknown vnc share= option"); goto fail; } } else { vd->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE; } vd->connections_limit = qemu_opt_get_number(opts, "connections", 32); #ifdef CONFIG_VNC_JPEG vd->lossy = qemu_opt_get_bool(opts, "lossy", false); #endif vd->non_adaptive = qemu_opt_get_bool(opts, "non-adaptive", false); /* adaptive updates are only used with tight encoding and * if lossy updates are enabled so we can disable all the * calculations otherwise */ if (!vd->lossy) { vd->non_adaptive = true; } if (acl) { if (strcmp(vd->id, "default") == 0) { vd->tlsaclname = g_strdup("vnc.x509dname"); } else { vd->tlsaclname = g_strdup_printf("vnc.%s.x509dname", vd->id); } qemu_acl_init(vd->tlsaclname); } #ifdef CONFIG_VNC_SASL if (acl && sasl) { char *aclname; if (strcmp(vd->id, "default") == 0) { aclname = g_strdup("vnc.username"); } else { aclname = g_strdup_printf("vnc.%s.username", vd->id); } vd->sasl.acl = qemu_acl_init(aclname); g_free(aclname); } #endif if (vnc_display_setup_auth(&vd->auth, &vd->subauth, vd->tlscreds, password, sasl, false, errp) < 0) { goto fail; } if (vnc_display_setup_auth(&vd->ws_auth, &vd->ws_subauth, vd->tlscreds, password, sasl, true, errp) < 0) { goto fail; } #ifdef CONFIG_VNC_SASL if ((saslErr = sasl_server_init(NULL, "qemu")) != SASL_OK) { error_setg(errp, "Failed to initialize SASL auth: %s", sasl_errstring(saslErr, NULL, NULL)); goto fail; } #endif vd->lock_key_sync = lock_key_sync; if (lock_key_sync) { vd->led = qemu_add_led_event_handler(kbd_leds, vd); } vd->ledstate = 0; vd->key_delay_ms = key_delay_ms; device_id = qemu_opt_get(opts, "display"); if (device_id) { int head = qemu_opt_get_number(opts, "head", 0); Error *err = NULL; con = qemu_console_lookup_by_device_name(device_id, head, &err); if (err) { error_propagate(errp, err); goto fail; } } else { con = NULL; } if (con != vd->dcl.con) { unregister_displaychangelistener(&vd->dcl); vd->dcl.con = con; register_displaychangelistener(&vd->dcl); } if (reverse) { if (vnc_display_connect(vd, saddr, nsaddr, wsaddr, nwsaddr, errp) < 0) { goto fail; } } else { if (vnc_display_listen(vd, saddr, nsaddr, wsaddr, nwsaddr, errp) < 0) { goto fail; } } if (qemu_opt_get(opts, "to")) { vnc_display_print_local_addr(vd); } cleanup: for (i = 0; i < nsaddr; i++) { qapi_free_SocketAddress(saddr[i]); } for (i = 0; i < nwsaddr; i++) { qapi_free_SocketAddress(wsaddr[i]); } return; fail: vnc_display_close(vd); goto cleanup; } void vnc_display_add_client(const char *id, int csock, bool skipauth) { VncDisplay *vd = vnc_display_find(id); QIOChannelSocket *sioc; if (!vd) { return; } sioc = qio_channel_socket_new_fd(csock, NULL); if (sioc) { qio_channel_set_name(QIO_CHANNEL(sioc), "vnc-server"); vnc_connect(vd, sioc, skipauth, false); object_unref(OBJECT(sioc)); } } static void vnc_auto_assign_id(QemuOptsList *olist, QemuOpts *opts) { int i = 2; char *id; id = g_strdup("default"); while (qemu_opts_find(olist, id)) { g_free(id); id = g_strdup_printf("vnc%d", i++); } qemu_opts_set_id(opts, id); } QemuOpts *vnc_parse(const char *str, Error **errp) { QemuOptsList *olist = qemu_find_opts("vnc"); QemuOpts *opts = qemu_opts_parse(olist, str, true, errp); const char *id; if (!opts) { return NULL; } id = qemu_opts_id(opts); if (!id) { /* auto-assign id if not present */ vnc_auto_assign_id(olist, opts); } return opts; } int vnc_init_func(void *opaque, QemuOpts *opts, Error **errp) { Error *local_err = NULL; char *id = (char *)qemu_opts_id(opts); assert(id); vnc_display_init(id); vnc_display_open(id, &local_err); if (local_err != NULL) { error_reportf_err(local_err, "Failed to start VNC server: "); exit(1); } return 0; } static void vnc_register_config(void) { qemu_add_opts(&qemu_vnc_opts); } opts_init(vnc_register_config);