| /* |
| * 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-core.h" |
| #include "sysemu/sysemu.h" |
| #include "qemu/error-report.h" |
| #include "qemu/main-loop.h" |
| #include "qemu/module.h" |
| #include "qemu/option.h" |
| #include "qemu/sockets.h" |
| #include "qemu/timer.h" |
| #include "authz/list.h" |
| #include "qemu/config-file.h" |
| #include "qapi/qapi-emit-events.h" |
| #include "qapi/qapi-events-ui.h" |
| #include "qapi/error.h" |
| #include "qapi/qapi-commands-ui.h" |
| #include "ui/input.h" |
| #include "crypto/hash.h" |
| #include "crypto/tlscredsanon.h" |
| #include "crypto/tlscredsx509.h" |
| #include "crypto/random.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_update_throttle_offset(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_TYPE_INET: |
| info->host = g_strdup(addr->u.inet.host); |
| info->service = g_strdup(addr->u.inet.port); |
| if (addr->u.inet.ipv6) { |
| info->family = NETWORK_ADDRESS_FAMILY_IPV6; |
| } else { |
| info->family = NETWORK_ADDRESS_FAMILY_IPV4; |
| } |
| break; |
| |
| case SOCKET_ADDRESS_TYPE_UNIX: |
| info->host = g_strdup(""); |
| info->service = g_strdup(addr->u.q_unix.path); |
| info->family = NETWORK_ADDRESS_FAMILY_UNIX; |
| break; |
| |
| case SOCKET_ADDRESS_TYPE_VSOCK: |
| case SOCKET_ADDRESS_TYPE_FD: |
| error_setg(errp, "Unsupported socket address type %s", |
| SocketAddressType_str(addr->type)); |
| break; |
| default: |
| abort(); |
| } |
| |
| 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->listener || !vd->listener->nsioc) { |
| return NULL; |
| } |
| |
| info = g_malloc0(sizeof(*info)); |
| vnc_init_basic_info_from_server_addr(vd->listener->sioc[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); |
| client->info->websocket = client->websocket; |
| 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)); |
| break; |
| case QAPI_EVENT_VNC_INITIALIZED: |
| qapi_event_send_vnc_initialized(si, vs->info); |
| break; |
| case QAPI_EVENT_VNC_DISCONNECTED: |
| qapi_event_send_vnc_disconnected(si, vs->info); |
| 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->listener || !vd->listener->nsioc) { |
| info->enabled = false; |
| } else { |
| info->enabled = true; |
| |
| /* for compatibility with the original command */ |
| info->has_clients = true; |
| info->clients = qmp_query_client_list(vd); |
| |
| addr = qio_channel_socket_get_local_address(vd->listener->sioc[0], |
| errp); |
| if (!addr) { |
| goto out_error; |
| } |
| |
| switch (addr->type) { |
| case SOCKET_ADDRESS_TYPE_INET: |
| info->host = g_strdup(addr->u.inet.host); |
| info->service = g_strdup(addr->u.inet.port); |
| if (addr->u.inet.ipv6) { |
| info->family = NETWORK_ADDRESS_FAMILY_IPV6; |
| } else { |
| info->family = NETWORK_ADDRESS_FAMILY_IPV4; |
| } |
| break; |
| |
| case SOCKET_ADDRESS_TYPE_UNIX: |
| info->host = g_strdup(""); |
| info->service = g_strdup(addr->u.q_unix.path); |
| info->family = NETWORK_ADDRESS_FAMILY_UNIX; |
| break; |
| |
| case SOCKET_ADDRESS_TYPE_VSOCK: |
| case SOCKET_ADDRESS_TYPE_FD: |
| error_setg(errp, "Unsupported socket address type %s", |
| SocketAddressType_str(addr->type)); |
| goto out_error; |
| default: |
| abort(); |
| } |
| |
| 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; vd->listener != NULL && i < vd->listener->nsioc; i++) { |
| info->server = qmp_query_server_entry( |
| vd->listener->sioc[i], false, vd->auth, vd->subauth, |
| info->server); |
| } |
| for (i = 0; vd->wslistener != NULL && i < vd->wslistener->nsioc; i++) { |
| info->server = qmp_query_server_entry( |
| vd->wslistener->sioc[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); |
| 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; |
| } |
| |
| assert(pixman_image_get_width(vs->vd->server) < 65536 && |
| pixman_image_get_width(vs->vd->server) >= 0); |
| assert(pixman_image_get_height(vs->vd->server) < 65536 && |
| pixman_image_get_height(vs->vd->server) >= 0); |
| 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); |
| if (vs->update == VNC_STATE_UPDATE_NONE && |
| vs->job_update != VNC_STATE_UPDATE_NONE) { |
| /* job aborted before completion */ |
| vs->update = vs->job_update; |
| vs->job_update = VNC_STATE_UPDATE_NONE; |
| } |
| 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 bool vnc_check_pageflip(DisplaySurface *s1, |
| DisplaySurface *s2) |
| { |
| return (s1 != NULL && |
| s2 != NULL && |
| surface_width(s1) == surface_width(s2) && |
| surface_height(s1) == surface_height(s2) && |
| surface_format(s1) == surface_format(s2)); |
| |
| } |
| |
| static void vnc_dpy_switch(DisplayChangeListener *dcl, |
| DisplaySurface *surface) |
| { |
| static const char placeholder_msg[] = |
| "Display output is not active."; |
| static DisplaySurface *placeholder; |
| VncDisplay *vd = container_of(dcl, VncDisplay, dcl); |
| bool pageflip = vnc_check_pageflip(vd->ds, surface); |
| VncState *vs; |
| |
| if (surface == NULL) { |
| if (placeholder == NULL) { |
| placeholder = qemu_create_message_surface(640, 480, placeholder_msg); |
| } |
| surface = placeholder; |
| } |
| |
| vnc_abort_display_jobs(vd); |
| vd->ds = surface; |
| |
| /* guest surface */ |
| qemu_pixman_image_unref(vd->guest.fb); |
| vd->guest.fb = pixman_image_ref(surface->image); |
| vd->guest.format = surface->format; |
| |
| if (pageflip) { |
| vnc_set_area_dirty(vd->guest.dirty, vd, 0, 0, |
| surface_width(surface), |
| surface_height(surface)); |
| return; |
| } |
| |
| /* server surface */ |
| vnc_update_server_surface(vd); |
| |
| 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)); |
| vnc_update_throttle_offset(vs); |
| } |
| } |
| |
| /* 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; |
| |
| 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: |
| vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_RAW); |
| n = vnc_raw_send_framebuffer_update(vs, x, y, w, h); |
| break; |
| } |
| return n; |
| } |
| |
| 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; |
| } |
| |
| /* |
| * Figure out how much pending data we should allow in the output |
| * buffer before we throttle incremental display updates, and/or |
| * drop audio samples. |
| * |
| * We allow for equiv of 1 full display's worth of FB updates, |
| * and 1 second of audio samples. If audio backlog was larger |
| * than that the client would already suffering awful audio |
| * glitches, so dropping samples is no worse really). |
| */ |
| static void vnc_update_throttle_offset(VncState *vs) |
| { |
| size_t offset = |
| vs->client_width * vs->client_height * vs->client_pf.bytes_per_pixel; |
| |
| if (vs->audio_cap) { |
| int bps; |
| switch (vs->as.fmt) { |
| default: |
| case AUDIO_FORMAT_U8: |
| case AUDIO_FORMAT_S8: |
| bps = 1; |
| break; |
| case AUDIO_FORMAT_U16: |
| case AUDIO_FORMAT_S16: |
| bps = 2; |
| break; |
| case AUDIO_FORMAT_U32: |
| case AUDIO_FORMAT_S32: |
| bps = 4; |
| break; |
| } |
| offset += vs->as.freq * bps * vs->as.nchannels; |
| } |
| |
| /* Put a floor of 1MB on offset, so that if we have a large pending |
| * buffer and the display is resized to a small size & back again |
| * we don't suddenly apply a tiny send limit |
| */ |
| offset = MAX(offset, 1024 * 1024); |
| |
| if (vs->throttle_output_offset != offset) { |
| trace_vnc_client_throttle_threshold( |
| vs, vs->ioc, vs->throttle_output_offset, offset, vs->client_width, |
| vs->client_height, vs->client_pf.bytes_per_pixel, vs->audio_cap); |
| } |
| |
| vs->throttle_output_offset = offset; |
| } |
| |
| static bool vnc_should_update(VncState *vs) |
| { |
| switch (vs->update) { |
| case VNC_STATE_UPDATE_NONE: |
| break; |
| case VNC_STATE_UPDATE_INCREMENTAL: |
| /* Only allow incremental updates if the pending send queue |
| * is less than the permitted threshold, and the job worker |
| * is completely idle. |
| */ |
| if (vs->output.offset < vs->throttle_output_offset && |
| vs->job_update == VNC_STATE_UPDATE_NONE) { |
| return true; |
| } |
| trace_vnc_client_throttle_incremental( |
| vs, vs->ioc, vs->job_update, vs->output.offset); |
| break; |
| case VNC_STATE_UPDATE_FORCE: |
| /* Only allow forced updates if the pending send queue |
| * does not contain a previous forced update, and the |
| * job worker is completely idle. |
| * |
| * Note this means we'll queue a forced update, even if |
| * the output buffer size is otherwise over the throttle |
| * output limit. |
| */ |
| if (vs->force_update_offset == 0 && |
| vs->job_update == VNC_STATE_UPDATE_NONE) { |
| return true; |
| } |
| trace_vnc_client_throttle_forced( |
| vs, vs->ioc, vs->job_update, vs->force_update_offset); |
| break; |
| } |
| return false; |
| } |
| |
| static int vnc_update_client(VncState *vs, int has_dirty) |
| { |
| VncDisplay *vd = vs->vd; |
| VncJob *job; |
| int y; |
| int height, width; |
| int n = 0; |
| |
| if (vs->disconnecting) { |
| vnc_disconnect_finish(vs); |
| return 0; |
| } |
| |
| vs->has_dirty += has_dirty; |
| if (!vnc_should_update(vs)) { |
| return 0; |
| } |
| |
| if (!vs->has_dirty && vs->update != VNC_STATE_UPDATE_FORCE) { |
| 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; |
| } |
| } |
| } |
| |
| vs->job_update = vs->update; |
| vs->update = VNC_STATE_UPDATE_NONE; |
| vnc_job_push(job); |
| vs->has_dirty = 0; |
| return n; |
| } |
| |
| /* audio */ |
| static void audio_capture_notify(void *opaque, audcnotification_e cmd) |
| { |
| VncState *vs = opaque; |
| |
| assert(vs->magic == VNC_MAGIC); |
| 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; |
| |
| assert(vs->magic == VNC_MAGIC); |
| vnc_lock_output(vs); |
| if (vs->output.offset < vs->throttle_output_offset) { |
| 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); |
| } else { |
| trace_vnc_client_throttle_audio(vs, vs->ioc, vs->output.offset); |
| } |
| 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->vd->audio_state, &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; |
| } |
| trace_vnc_client_disconnect_start(vs, vs->ioc); |
| vnc_set_share_mode(vs, VNC_SHARE_MODE_DISCONNECTED); |
| if (vs->ioc_tag) { |
| g_source_remove(vs->ioc_tag); |
| vs->ioc_tag = 0; |
| } |
| qio_channel_close(vs->ioc, NULL); |
| vs->disconnecting = TRUE; |
| } |
| |
| void vnc_disconnect_finish(VncState *vs) |
| { |
| int i; |
| |
| trace_vnc_client_disconnect_finish(vs, vs->ioc); |
| |
| 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); |
| qkbd_state_lift_all_keys(vs->vd->kbd); |
| |
| 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; |
| vs->magic = 0; |
| g_free(vs->zrle); |
| g_free(vs->tight); |
| g_free(vs); |
| } |
| |
| size_t vnc_client_io_error(VncState *vs, ssize_t ret, Error *err) |
| { |
| if (ret <= 0) { |
| if (ret == 0) { |
| trace_vnc_client_eof(vs, vs->ioc); |
| vnc_disconnect_start(vs); |
| } else if (ret != QIO_CHANNEL_ERR_BLOCK) { |
| trace_vnc_client_io_error(vs, vs->ioc, |
| err ? error_get_pretty(err) : "Unknown"); |
| vnc_disconnect_start(vs); |
| } |
| |
| error_free(err); |
| 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 |
| * 0 on I/O error, and disconnects the client socket. |
| */ |
| size_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 |
| * 0 on I/O error, and disconnects the client socket. |
| */ |
| static size_t vnc_client_write_plain(VncState *vs) |
| { |
| size_t offset; |
| size_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; |
| |
| if (ret >= vs->force_update_offset) { |
| if (vs->force_update_offset != 0) { |
| trace_vnc_client_unthrottle_forced(vs, vs->ioc); |
| } |
| vs->force_update_offset = 0; |
| } else { |
| vs->force_update_offset -= ret; |
| } |
| offset = vs->output.offset; |
| buffer_advance(&vs->output, ret); |
| if (offset >= vs->throttle_output_offset && |
| vs->output.offset < vs->throttle_output_offset) { |
| trace_vnc_client_unthrottle_incremental(vs, vs->ioc, vs->output.offset); |
| } |
| |
| 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) |
| { |
| assert(vs->magic == VNC_MAGIC); |
| 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 |
| * 0 on I/O error or EOF, and disconnects the client socket. |
| */ |
| size_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, which may be less than |
| * the requested 'datalen' if the socket would block. Returns |
| * 0 on I/O error or EOF, and disconnects the client socket. |
| */ |
| static size_t vnc_client_read_plain(VncState *vs) |
| { |
| size_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; |
| |
| assert(vs->magic == VNC_MAGIC); |
| 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) |
| { |
| size_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; |
| |
| assert(vs->magic == VNC_MAGIC); |
| if (condition & G_IO_IN) { |
| if (vnc_client_read(vs) < 0) { |
| /* vs is free()ed here */ |
| return TRUE; |
| } |
| } |
| if (condition & G_IO_OUT) { |
| vnc_client_write(vs); |
| } |
| |
| if (vs->disconnecting) { |
| if (vs->ioc_tag != 0) { |
| g_source_remove(vs->ioc_tag); |
| } |
| vs->ioc_tag = 0; |
| } |
| return TRUE; |
| } |
| |
| |
| /* |
| * Scale factor to apply to vs->throttle_output_offset when checking for |
| * hard limit. Worst case normal usage could be x2, if we have a complete |
| * incremental update and complete forced update in the output buffer. |
| * So x3 should be good enough, but we pick x5 to be conservative and thus |
| * (hopefully) never trigger incorrectly. |
| */ |
| #define VNC_THROTTLE_OUTPUT_LIMIT_SCALE 5 |
| |
| void vnc_write(VncState *vs, const void *data, size_t len) |
| { |
| assert(vs->magic == VNC_MAGIC); |
| if (vs->disconnecting) { |
| return; |
| } |
| /* Protection against malicious client/guest to prevent our output |
| * buffer growing without bound if client stops reading data. This |
| * should rarely trigger, because we have earlier throttling code |
| * which stops issuing framebuffer updates and drops audio data |
| * if the throttle_output_offset value is exceeded. So we only reach |
| * this higher level if a huge number of pseudo-encodings get |
| * triggered while data can't be sent on the socket. |
| * |
| * NB throttle_output_offset can be zero during early protocol |
| * handshake, or from the job thread's VncState clone |
| */ |
| if (vs->throttle_output_offset != 0 && |
| (vs->output.offset / VNC_THROTTLE_OUTPUT_LIMIT_SCALE) > |
| vs->throttle_output_offset) { |
| trace_vnc_client_output_limit(vs, vs->ioc, vs->output.offset, |
| vs->throttle_output_offset); |
| vnc_disconnect_start(vs); |
| return; |
| } |
| 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); |
| } |
| if (vs->disconnecting) { |
| if (vs->ioc_tag != 0) { |
| g_source_remove(vs->ioc_tag); |
| } |
| vs->ioc_tag = 0; |
| } |
| 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, 0, width); |
| qemu_input_queue_abs(con, INPUT_AXIS_Y, y, 0, 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 press_key(VncState *vs, QKeyCode qcode) |
| { |
| qkbd_state_key_event(vs->vd->kbd, qcode, true); |
| qkbd_state_key_event(vs->vd->kbd, qcode, false); |
| } |
| |
| 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) |
| { |
| QKeyCode qcode = qemu_input_key_number_to_qcode(keycode); |
| |
| /* QEMU console switch */ |
| switch (qcode) { |
| case Q_KEY_CODE_1 ... Q_KEY_CODE_9: /* '1' to '9' keys */ |
| if (vs->vd->dcl.con == NULL && down && |
| qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_CTRL) && |
| qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_ALT)) { |
| /* Reset the modifiers sent to the current console */ |
| qkbd_state_lift_all_keys(vs->vd->kbd); |
| console_select(qcode - Q_KEY_CODE_1); |
| return; |
| } |
| default: |
| 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 (!qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_NUMLOCK)) { |
| trace_vnc_key_sync_numlock(true); |
| press_key(vs, Q_KEY_CODE_NUM_LOCK); |
| } |
| } else { |
| if (qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_NUMLOCK)) { |
| trace_vnc_key_sync_numlock(false); |
| press_key(vs, Q_KEY_CODE_NUM_LOCK); |
| } |
| } |
| } |
| |
| 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'); |
| bool shift = qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_SHIFT); |
| bool capslock = qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_CAPSLOCK); |
| if (capslock) { |
| if (uppercase == shift) { |
| trace_vnc_key_sync_capslock(false); |
| press_key(vs, Q_KEY_CODE_CAPS_LOCK); |
| } |
| } else { |
| if (uppercase != shift) { |
| trace_vnc_key_sync_capslock(true); |
| press_key(vs, Q_KEY_CODE_CAPS_LOCK); |
| } |
| } |
| } |
| |
| qkbd_state_key_event(vs->vd->kbd, qcode, down); |
| if (!qemu_console_is_graphic(NULL)) { |
| bool numlock = qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_NUMLOCK); |
| bool control = qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_CTRL); |
| /* 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 const char *code2name(int keycode) |
| { |
| return QKeyCode_str(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, |
| vs->vd->kbd, down) & 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) |
| { |
| if (incremental) { |
| if (vs->update != VNC_STATE_UPDATE_FORCE) { |
| vs->update = VNC_STATE_UPDATE_INCREMENTAL; |
| } |
| } else { |
| vs->update = VNC_STATE_UPDATE_FORCE; |
| 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: |
| /* |
| * VNC_ENCODING_ZRLE compresses better than VNC_ENCODING_ZLIB. |
| * So prioritize ZRLE, even if the client hints that it prefers |
| * ZLIB. |
| */ |
| if ((vs->features & VNC_FEATURE_ZRLE_MASK) == 0) { |
| 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 = ctpopl(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 = ctpopl(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 = ctpopl(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; |
| uint32_t freq; |
| 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 = AUDIO_FORMAT_U8; break; |
| case 1: vs->as.fmt = AUDIO_FORMAT_S8; break; |
| case 2: vs->as.fmt = AUDIO_FORMAT_U16; break; |
| case 3: vs->as.fmt = AUDIO_FORMAT_S16; break; |
| case 4: vs->as.fmt = AUDIO_FORMAT_U32; break; |
| case 5: vs->as.fmt = AUDIO_FORMAT_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 count %d\n", |
| read_u8(data, 5)); |
| vnc_client_error(vs); |
| break; |
| } |
| freq = read_u32(data, 6); |
| /* No official limit for protocol, but 48khz is a sensible |
| * upper bound for trustworthy clients, and this limit |
| * protects calculations involving 'vs->as.freq' later. |
| */ |
| if (freq > 48000) { |
| VNC_DEBUG("Invalid audio frequency %u > 48000", freq); |
| vnc_client_error(vs); |
| break; |
| } |
| vs->as.freq = freq; |
| 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_update_throttle_offset(vs); |
| 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; |
| } |
| |
| assert(pixman_image_get_width(vs->vd->server) < 65536 && |
| pixman_image_get_width(vs->vd->server) >= 0); |
| assert(pixman_image_get_height(vs->vd->server) < 65536 && |
| pixman_image_get_height(vs->vd->server) >= 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 authentication_failed(VncState *vs) |
| { |
| 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); |
| } |
| |
| 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) { |
| trace_vnc_auth_fail(vs, vs->auth, "password is not set", ""); |
| goto reject; |
| } |
| if (vs->vd->expires < now) { |
| trace_vnc_auth_fail(vs, vs->auth, "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) { |
| trace_vnc_auth_fail(vs, vs->auth, "cannot create cipher", |
| error_get_pretty(err)); |
| error_free(err); |
| goto reject; |
| } |
| |
| if (qcrypto_cipher_encrypt(cipher, |
| vs->challenge, |
| response, |
| VNC_AUTH_CHALLENGE_SIZE, |
| &err) < 0) { |
| trace_vnc_auth_fail(vs, vs->auth, "cannot encrypt challenge response", |
| error_get_pretty(err)); |
| error_free(err); |
| goto reject; |
| } |
| |
| /* Compare expected vs actual challenge response */ |
| if (memcmp(response, data, VNC_AUTH_CHALLENGE_SIZE) != 0) { |
| trace_vnc_auth_fail(vs, vs->auth, "mis-matched challenge response", ""); |
| goto reject; |
| } else { |
| trace_vnc_auth_pass(vs, vs->auth); |
| vnc_write_u32(vs, 0); /* Accept auth */ |
| vnc_flush(vs); |
| |
| start_client_init(vs); |
| } |
| |
| qcrypto_cipher_free(cipher); |
| return 0; |
| |
| reject: |
| authentication_failed(vs); |
| qcrypto_cipher_free(cipher); |
| return 0; |
| } |
| |
| void start_auth_vnc(VncState *vs) |
| { |
| Error *err = NULL; |
| |
| if (qcrypto_random_bytes(vs->challenge, sizeof(vs->challenge), &err)) { |
| trace_vnc_auth_fail(vs, vs->auth, "cannot get random bytes", |
| error_get_pretty(err)); |
| error_free(err); |
| authentication_failed(vs); |
| return; |
| } |
| |
| /* 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 */ |
| trace_vnc_auth_reject(vs, vs->auth, (int)data[0]); |
| authentication_failed(vs); |
| } else { /* Accept requested auth */ |
| trace_vnc_auth_start(vs, vs->auth); |
| switch (vs->auth) { |
| case VNC_AUTH_NONE: |
| if (vs->minor >= 8) { |
| vnc_write_u32(vs, 0); /* Accept auth completion */ |
| vnc_flush(vs); |
| } |
| trace_vnc_auth_pass(vs, vs->auth); |
| start_client_init(vs); |
| break; |
| |
| case VNC_AUTH_VNC: |
| start_auth_vnc(vs); |
| break; |
| |
| case VNC_AUTH_VENCRYPT: |
| start_auth_vencrypt(vs); |
| break; |
| |
| #ifdef CONFIG_VNC_SASL |
| case VNC_AUTH_SASL: |
| start_auth_sasl(vs); |
| break; |
| #endif /* CONFIG_VNC_SASL */ |
| |
| default: /* Should not be possible, but just in case */ |
| trace_vnc_auth_fail(vs, vs->auth, "Unhandled auth method", ""); |
| authentication_failed(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) { |
| trace_vnc_auth_start(vs, vs->auth); |
| if (vs->auth == VNC_AUTH_NONE) { |
| vnc_write_u32(vs, vs->auth); |
| vnc_flush(vs); |
| trace_vnc_auth_pass(vs, vs->auth); |
| 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 { |
| trace_vnc_auth_fail(vs, vs->auth, |
| "Unsupported auth method for v3.3", ""); |
| vnc_write_u32(vs, VNC_AUTH_INVALID); |
| vnc_flush(vs); |
| vnc_client_error(vs); |
| } |
| } else { |
| 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 = QEMU_ALIGN_DOWN(y, VNC_STAT_RECT); |
| x = QEMU_ALIGN_DOWN(x, 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 = QEMU_ALIGN_DOWN(x, VNC_STAT_RECT); |
| y = QEMU_ALIGN_DOWN(y, 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) |
|