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-rw-r--r--ui/vnc.c3790
1 files changed, 3790 insertions, 0 deletions
diff --git a/ui/vnc.c b/ui/vnc.c
new file mode 100644
index 00000000..52c68095
--- /dev/null
+++ b/ui/vnc.c
@@ -0,0 +1,3790 @@
+/*
+ * 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 "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 "qemu/osdep.h"
+#include "ui/input.h"
+#include "qapi-event.h"
+#include "crypto/hash.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/%d: %s -> %s\n", __func__,
+ vs->csock, 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 char *addr_to_string(const char *format,
+ struct sockaddr_storage *sa,
+ socklen_t salen) {
+ char *addr;
+ char host[NI_MAXHOST];
+ char serv[NI_MAXSERV];
+ int err;
+ size_t addrlen;
+
+ if ((err = getnameinfo((struct sockaddr *)sa, salen,
+ host, sizeof(host),
+ serv, sizeof(serv),
+ NI_NUMERICHOST | NI_NUMERICSERV)) != 0) {
+ VNC_DEBUG("Cannot resolve address %d: %s\n",
+ err, gai_strerror(err));
+ return NULL;
+ }
+
+ /* Enough for the existing format + the 2 vars we're
+ * substituting in. */
+ addrlen = strlen(format) + strlen(host) + strlen(serv);
+ addr = g_malloc(addrlen + 1);
+ snprintf(addr, addrlen, format, host, serv);
+ addr[addrlen] = '\0';
+
+ return addr;
+}
+
+
+char *vnc_socket_local_addr(const char *format, int fd) {
+ struct sockaddr_storage sa;
+ socklen_t salen;
+
+ salen = sizeof(sa);
+ if (getsockname(fd, (struct sockaddr*)&sa, &salen) < 0)
+ return NULL;
+
+ return addr_to_string(format, &sa, salen);
+}
+
+char *vnc_socket_remote_addr(const char *format, int fd) {
+ struct sockaddr_storage sa;
+ socklen_t salen;
+
+ salen = sizeof(sa);
+ if (getpeername(fd, (struct sockaddr*)&sa, &salen) < 0)
+ return NULL;
+
+ return addr_to_string(format, &sa, salen);
+}
+
+static VncBasicInfo *vnc_basic_info_get(struct sockaddr_storage *sa,
+ socklen_t salen)
+{
+ VncBasicInfo *info;
+ char host[NI_MAXHOST];
+ char serv[NI_MAXSERV];
+ int err;
+
+ if ((err = getnameinfo((struct sockaddr *)sa, salen,
+ host, sizeof(host),
+ serv, sizeof(serv),
+ NI_NUMERICHOST | NI_NUMERICSERV)) != 0) {
+ VNC_DEBUG("Cannot resolve address %d: %s\n",
+ err, gai_strerror(err));
+ return NULL;
+ }
+
+ info = g_malloc0(sizeof(VncBasicInfo));
+ info->host = g_strdup(host);
+ info->service = g_strdup(serv);
+ info->family = inet_netfamily(sa->ss_family);
+ return info;
+}
+
+static VncBasicInfo *vnc_basic_info_get_from_server_addr(int fd)
+{
+ struct sockaddr_storage sa;
+ socklen_t salen;
+
+ salen = sizeof(sa);
+ if (getsockname(fd, (struct sockaddr*)&sa, &salen) < 0) {
+ return NULL;
+ }
+
+ return vnc_basic_info_get(&sa, salen);
+}
+
+static VncBasicInfo *vnc_basic_info_get_from_remote_addr(int fd)
+{
+ struct sockaddr_storage sa;
+ socklen_t salen;
+
+ salen = sizeof(sa);
+ if (getpeername(fd, (struct sockaddr*)&sa, &salen) < 0) {
+ return NULL;
+ }
+
+ return vnc_basic_info_get(&sa, salen);
+}
+
+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:
+#ifdef CONFIG_VNC_TLS
+ 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";
+ }
+#else
+ return "vencrypt";
+#endif
+ case VNC_AUTH_SASL:
+ return "sasl";
+ }
+ return "unknown";
+}
+
+static VncServerInfo *vnc_server_info_get(VncDisplay *vd)
+{
+ VncServerInfo *info;
+ VncBasicInfo *bi = vnc_basic_info_get_from_server_addr(vd->lsock);
+ if (!bi) {
+ return NULL;
+ }
+
+ info = g_malloc(sizeof(*info));
+ info->base = bi;
+ info->has_auth = true;
+ info->auth = g_strdup(vnc_auth_name(vd));
+ return info;
+}
+
+static void vnc_client_cache_auth(VncState *client)
+{
+ if (!client->info) {
+ return;
+ }
+
+#ifdef CONFIG_VNC_TLS
+ if (client->tls.session &&
+ client->tls.dname) {
+ client->info->has_x509_dname = true;
+ client->info->x509_dname = g_strdup(client->tls.dname);
+ }
+#endif
+#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)
+{
+ VncBasicInfo *bi = vnc_basic_info_get_from_remote_addr(client->csock);
+
+ if (bi) {
+ client->info = g_malloc0(sizeof(*client->info));
+ client->info->base = bi;
+ }
+}
+
+static void vnc_qmp_event(VncState *vs, QAPIEvent event)
+{
+ VncServerInfo *si;
+
+ if (!vs->info) {
+ return;
+ }
+ g_assert(vs->info->base);
+
+ si = vnc_server_info_get(vs->vd);
+ if (!si) {
+ return;
+ }
+
+ switch (event) {
+ case QAPI_EVENT_VNC_CONNECTED:
+ qapi_event_send_vnc_connected(si, vs->info->base, &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)
+{
+ struct sockaddr_storage sa;
+ socklen_t salen = sizeof(sa);
+ char host[NI_MAXHOST];
+ char serv[NI_MAXSERV];
+ VncClientInfo *info;
+
+ if (getpeername(client->csock, (struct sockaddr *)&sa, &salen) < 0) {
+ return NULL;
+ }
+
+ if (getnameinfo((struct sockaddr *)&sa, salen,
+ host, sizeof(host),
+ serv, sizeof(serv),
+ NI_NUMERICHOST | NI_NUMERICSERV) < 0) {
+ return NULL;
+ }
+
+ info = g_malloc0(sizeof(*info));
+ info->base = g_malloc0(sizeof(*info->base));
+ info->base->host = g_strdup(host);
+ info->base->service = g_strdup(serv);
+ info->base->family = inet_netfamily(sa.ss_family);
+ info->base->websocket = client->websocket;
+
+#ifdef CONFIG_VNC_TLS
+ if (client->tls.session && client->tls.dname) {
+ info->has_x509_dname = true;
+ info->x509_dname = g_strdup(client->tls.dname);
+ }
+#endif
+#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);
+
+ if (vd == NULL || !vd->enabled) {
+ info->enabled = false;
+ } else {
+ struct sockaddr_storage sa;
+ socklen_t salen = sizeof(sa);
+ char host[NI_MAXHOST];
+ char serv[NI_MAXSERV];
+
+ info->enabled = true;
+
+ /* for compatibility with the original command */
+ info->has_clients = true;
+ info->clients = qmp_query_client_list(vd);
+
+ if (vd->lsock == -1) {
+ return info;
+ }
+
+ if (getsockname(vd->lsock, (struct sockaddr *)&sa,
+ &salen) == -1) {
+ error_setg(errp, QERR_UNDEFINED_ERROR);
+ goto out_error;
+ }
+
+ if (getnameinfo((struct sockaddr *)&sa, salen,
+ host, sizeof(host),
+ serv, sizeof(serv),
+ NI_NUMERICHOST | NI_NUMERICSERV) < 0) {
+ error_setg(errp, QERR_UNDEFINED_ERROR);
+ goto out_error;
+ }
+
+ info->has_host = true;
+ info->host = g_strdup(host);
+
+ info->has_service = true;
+ info->service = g_strdup(serv);
+
+ info->has_family = true;
+ info->family = inet_netfamily(sa.ss_family);
+
+ info->has_auth = true;
+ info->auth = g_strdup(vnc_auth_name(vd));
+ }
+
+ return info;
+
+out_error:
+ qapi_free_VncInfo(info);
+ return NULL;
+}
+
+static VncBasicInfoList *qmp_query_server_entry(int socket,
+ bool websocket,
+ VncBasicInfoList *prev)
+{
+ VncBasicInfoList *list;
+ VncBasicInfo *info;
+ struct sockaddr_storage sa;
+ socklen_t salen = sizeof(sa);
+ char host[NI_MAXHOST];
+ char serv[NI_MAXSERV];
+
+ if (getsockname(socket, (struct sockaddr *)&sa, &salen) < 0 ||
+ getnameinfo((struct sockaddr *)&sa, salen,
+ host, sizeof(host), serv, sizeof(serv),
+ NI_NUMERICHOST | NI_NUMERICSERV) < 0) {
+ return prev;
+ }
+
+ info = g_new0(VncBasicInfo, 1);
+ info->host = g_strdup(host);
+ info->service = g_strdup(serv);
+ info->family = inet_netfamily(sa.ss_family);
+ info->websocket = websocket;
+
+ list = g_new0(VncBasicInfoList, 1);
+ list->value = info;
+ list->next = prev;
+ return list;
+}
+
+static void qmp_query_auth(VncDisplay *vd, VncInfo2 *info)
+{
+ switch (vd->auth) {
+ case VNC_AUTH_VNC:
+ info->auth = VNC_PRIMARY_AUTH_VNC;
+ break;
+ case VNC_AUTH_RA2:
+ info->auth = VNC_PRIMARY_AUTH_RA2;
+ break;
+ case VNC_AUTH_RA2NE:
+ info->auth = VNC_PRIMARY_AUTH_RA2NE;
+ break;
+ case VNC_AUTH_TIGHT:
+ info->auth = VNC_PRIMARY_AUTH_TIGHT;
+ break;
+ case VNC_AUTH_ULTRA:
+ info->auth = VNC_PRIMARY_AUTH_ULTRA;
+ break;
+ case VNC_AUTH_TLS:
+ info->auth = VNC_PRIMARY_AUTH_TLS;
+ break;
+ case VNC_AUTH_VENCRYPT:
+ info->auth = VNC_PRIMARY_AUTH_VENCRYPT;
+#ifdef CONFIG_VNC_TLS
+ info->has_vencrypt = true;
+ switch (vd->subauth) {
+ case VNC_AUTH_VENCRYPT_PLAIN:
+ info->vencrypt = VNC_VENCRYPT_SUB_AUTH_PLAIN;
+ break;
+ case VNC_AUTH_VENCRYPT_TLSNONE:
+ info->vencrypt = VNC_VENCRYPT_SUB_AUTH_TLS_NONE;
+ break;
+ case VNC_AUTH_VENCRYPT_TLSVNC:
+ info->vencrypt = VNC_VENCRYPT_SUB_AUTH_TLS_VNC;
+ break;
+ case VNC_AUTH_VENCRYPT_TLSPLAIN:
+ info->vencrypt = VNC_VENCRYPT_SUB_AUTH_TLS_PLAIN;
+ break;
+ case VNC_AUTH_VENCRYPT_X509NONE:
+ info->vencrypt = VNC_VENCRYPT_SUB_AUTH_X509_NONE;
+ break;
+ case VNC_AUTH_VENCRYPT_X509VNC:
+ info->vencrypt = VNC_VENCRYPT_SUB_AUTH_X509_VNC;
+ break;
+ case VNC_AUTH_VENCRYPT_X509PLAIN:
+ info->vencrypt = VNC_VENCRYPT_SUB_AUTH_X509_PLAIN;
+ break;
+ case VNC_AUTH_VENCRYPT_TLSSASL:
+ info->vencrypt = VNC_VENCRYPT_SUB_AUTH_TLS_SASL;
+ break;
+ case VNC_AUTH_VENCRYPT_X509SASL:
+ info->vencrypt = VNC_VENCRYPT_SUB_AUTH_X509_SASL;
+ break;
+ default:
+ info->has_vencrypt = false;
+ break;
+ }
+#endif
+ break;
+ case VNC_AUTH_SASL:
+ info->auth = VNC_PRIMARY_AUTH_SASL;
+ break;
+ case VNC_AUTH_NONE:
+ default:
+ info->auth = VNC_PRIMARY_AUTH_NONE;
+ break;
+ }
+}
+
+VncInfo2List *qmp_query_vnc_servers(Error **errp)
+{
+ VncInfo2List *item, *prev = NULL;
+ VncInfo2 *info;
+ VncDisplay *vd;
+ DeviceState *dev;
+
+ 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, info);
+ 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);
+ }
+ if (vd->lsock != -1) {
+ info->server = qmp_query_server_entry(vd->lsock, false,
+ info->server);
+ }
+ if (vd->lwebsock != -1) {
+ info->server = qmp_query_server_entry(vd->lwebsock, true,
+ 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 void vnc_set_area_dirty(DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT],
+ VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT),
+ int width, int height,
+ int x, int y, int w, int h) {
+ /* 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;
+ int width = pixman_image_get_width(vd->server);
+ int height = pixman_image_get_height(vd->server);
+
+ vnc_set_area_dirty(s->dirty, width, height, 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);
+}
+
+void buffer_reserve(Buffer *buffer, size_t len)
+{
+ if ((buffer->capacity - buffer->offset) < len) {
+ buffer->capacity += (len + 1024);
+ buffer->buffer = g_realloc(buffer->buffer, buffer->capacity);
+ }
+}
+
+static int buffer_empty(Buffer *buffer)
+{
+ return buffer->offset == 0;
+}
+
+uint8_t *buffer_end(Buffer *buffer)
+{
+ return buffer->buffer + buffer->offset;
+}
+
+void buffer_reset(Buffer *buffer)
+{
+ buffer->offset = 0;
+}
+
+void buffer_free(Buffer *buffer)
+{
+ g_free(buffer->buffer);
+ buffer->offset = 0;
+ buffer->capacity = 0;
+ buffer->buffer = NULL;
+}
+
+void buffer_append(Buffer *buffer, const void *data, size_t len)
+{
+ memcpy(buffer->buffer + buffer->offset, data, len);
+ buffer->offset += len;
+}
+
+void buffer_advance(Buffer *buf, size_t len)
+{
+ memmove(buf->buffer, buf->buffer + len,
+ (buf->offset - len));
+ buf->offset -= len;
+}
+
+static void vnc_desktop_resize(VncState *vs)
+{
+ if (vs->csock == -1 || !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_dpy_switch(DisplayChangeListener *dcl,
+ DisplaySurface *surface)
+{
+ VncDisplay *vd = container_of(dcl, VncDisplay, dcl);
+ VncState *vs;
+ int width, height;
+
+ vnc_abort_display_jobs(vd);
+
+ /* server surface */
+ qemu_pixman_image_unref(vd->server);
+ vd->ds = surface;
+ width = MIN(VNC_MAX_WIDTH, ROUND_UP(surface_width(vd->ds),
+ VNC_DIRTY_PIXELS_PER_BIT));
+ height = MIN(VNC_MAX_HEIGHT, surface_height(vd->ds));
+ vd->server = pixman_image_create_bits(VNC_SERVER_FB_FORMAT,
+ width, height, NULL, 0);
+
+ /* guest surface */
+#if 0 /* FIXME */
+ if (ds_get_bytes_per_pixel(ds) != vd->guest.ds->pf.bytes_per_pixel)
+ console_color_init(ds);
+#endif
+ qemu_pixman_image_unref(vd->guest.fb);
+ vd->guest.fb = pixman_image_ref(surface->image);
+ vd->guest.format = surface->format;
+ memset(vd->guest.dirty, 0x00, sizeof(vd->guest.dirty));
+ vnc_set_area_dirty(vd->guest.dirty, width, height, 0, 0,
+ width, height);
+
+ 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, width, height, 0, 0,
+ width, height);
+ }
+}
+
+/* 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_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;
+
+ 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 */
+ }
+ }
+
+ /* 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)
+{
+ vs->has_dirty += has_dirty;
+ if (vs->need_update && vs->csock != -1) {
+ 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->csock == -1) {
+ 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->csock == -1)
+ return;
+ vnc_set_share_mode(vs, VNC_SHARE_MODE_DISCONNECTED);
+ qemu_set_fd_handler(vs->csock, NULL, NULL, NULL);
+ closesocket(vs->csock);
+ vs->csock = -1;
+}
+
+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);
+ buffer_free(&vs->ws_input);
+ buffer_free(&vs->ws_output);
+
+ qapi_free_VncClientInfo(vs->info);
+
+ vnc_zlib_clear(vs);
+ vnc_tight_clear(vs);
+ vnc_zrle_clear(vs);
+
+#ifdef CONFIG_VNC_TLS
+ vnc_tls_client_cleanup(vs);
+#endif /* CONFIG_VNC_TLS */
+#ifdef CONFIG_VNC_SASL
+ vnc_sasl_client_cleanup(vs);
+#endif /* CONFIG_VNC_SASL */
+ audio_del(vs);
+ vnc_release_modifiers(vs);
+
+ if (vs->initialized) {
+ QTAILQ_REMOVE(&vs->vd->clients, vs, next);
+ qemu_remove_mouse_mode_change_notifier(&vs->mouse_mode_notifier);
+ }
+
+ if (vs->vd->lock_key_sync)
+ qemu_remove_led_event_handler(vs->led);
+ 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);
+ g_free(vs);
+}
+
+int vnc_client_io_error(VncState *vs, int ret, int last_errno)
+{
+ if (ret == 0 || ret == -1) {
+ if (ret == -1) {
+ switch (last_errno) {
+ case EINTR:
+ case EAGAIN:
+#ifdef _WIN32
+ case WSAEWOULDBLOCK:
+#endif
+ return 0;
+ default:
+ break;
+ }
+ }
+
+ VNC_DEBUG("Closing down client sock: ret %d, errno %d\n",
+ ret, ret < 0 ? last_errno : 0);
+ vnc_disconnect_start(vs);
+
+ return 0;
+ }
+ return ret;
+}
+
+
+void vnc_client_error(VncState *vs)
+{
+ VNC_DEBUG("Closing down client sock: protocol error\n");
+ vnc_disconnect_start(vs);
+}
+
+#ifdef CONFIG_VNC_TLS
+static long vnc_client_write_tls(gnutls_session_t *session,
+ const uint8_t *data,
+ size_t datalen)
+{
+ long ret = gnutls_write(*session, data, datalen);
+ if (ret < 0) {
+ if (ret == GNUTLS_E_AGAIN) {
+ errno = EAGAIN;
+ } else {
+ errno = EIO;
+ }
+ ret = -1;
+ }
+ return ret;
+}
+#endif /* CONFIG_VNC_TLS */
+
+/*
+ * 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.
+ */
+long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen)
+{
+ long ret;
+#ifdef CONFIG_VNC_TLS
+ if (vs->tls.session) {
+ ret = vnc_client_write_tls(&vs->tls.session, data, datalen);
+ } else {
+#endif /* CONFIG_VNC_TLS */
+ ret = send(vs->csock, (const void *)data, datalen, 0);
+#ifdef CONFIG_VNC_TLS
+ }
+#endif /* CONFIG_VNC_TLS */
+ VNC_DEBUG("Wrote wire %p %zd -> %ld\n", data, datalen, ret);
+ return vnc_client_io_error(vs, ret, socket_error());
+}
+
+
+/*
+ * 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 long vnc_client_write_plain(VncState *vs)
+{
+ long 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) {
+ qemu_set_fd_handler(vs->csock, vnc_client_read, NULL, vs);
+ }
+
+ 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(void *opaque)
+{
+ VncState *vs = opaque;
+
+#ifdef CONFIG_VNC_SASL
+ if (vs->sasl.conn &&
+ vs->sasl.runSSF &&
+ !vs->sasl.waitWriteSSF) {
+ vnc_client_write_sasl(vs);
+ } else
+#endif /* CONFIG_VNC_SASL */
+ {
+ if (vs->encode_ws) {
+ vnc_client_write_ws(vs);
+ } else {
+ vnc_client_write_plain(vs);
+ }
+ }
+}
+
+void vnc_client_write(void *opaque)
+{
+ VncState *vs = opaque;
+
+ vnc_lock_output(vs);
+ if (vs->output.offset || vs->ws_output.offset) {
+ vnc_client_write_locked(opaque);
+ } else if (vs->csock != -1) {
+ qemu_set_fd_handler(vs->csock, vnc_client_read, NULL, vs);
+ }
+ vnc_unlock_output(vs);
+}
+
+void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting)
+{
+ vs->read_handler = func;
+ vs->read_handler_expect = expecting;
+}
+
+#ifdef CONFIG_VNC_TLS
+static long vnc_client_read_tls(gnutls_session_t *session, uint8_t *data,
+ size_t datalen)
+{
+ long ret = gnutls_read(*session, data, datalen);
+ if (ret < 0) {
+ if (ret == GNUTLS_E_AGAIN) {
+ errno = EAGAIN;
+ } else {
+ errno = EIO;
+ }
+ ret = -1;
+ }
+ return ret;
+}
+#endif /* CONFIG_VNC_TLS */
+
+/*
+ * 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.
+ */
+long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen)
+{
+ long ret;
+#ifdef CONFIG_VNC_TLS
+ if (vs->tls.session) {
+ ret = vnc_client_read_tls(&vs->tls.session, data, datalen);
+ } else {
+#endif /* CONFIG_VNC_TLS */
+ ret = qemu_recv(vs->csock, data, datalen, 0);
+#ifdef CONFIG_VNC_TLS
+ }
+#endif /* CONFIG_VNC_TLS */
+ VNC_DEBUG("Read wire %p %zd -> %ld\n", data, datalen, ret);
+ return vnc_client_io_error(vs, ret, socket_error());
+}
+
+
+/*
+ * 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 long vnc_client_read_plain(VncState *vs)
+{
+ int 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)
+ */
+void vnc_client_read(void *opaque)
+{
+ VncState *vs = opaque;
+ long ret;
+
+#ifdef CONFIG_VNC_SASL
+ if (vs->sasl.conn && vs->sasl.runSSF)
+ ret = vnc_client_read_sasl(vs);
+ else
+#endif /* CONFIG_VNC_SASL */
+ if (vs->encode_ws) {
+ ret = vnc_client_read_ws(vs);
+ if (ret == -1) {
+ vnc_disconnect_start(vs);
+ return;
+ } else if (ret == -2) {
+ vnc_client_error(vs);
+ return;
+ }
+ } else {
+ ret = vnc_client_read_plain(vs);
+ }
+ if (!ret) {
+ if (vs->csock == -1)
+ vnc_disconnect_finish(vs);
+ return;
+ }
+
+ 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->csock == -1) {
+ vnc_disconnect_finish(vs);
+ return;
+ }
+
+ if (!ret) {
+ buffer_advance(&vs->input, len);
+ } else {
+ vs->read_handler_expect = ret;
+ }
+ }
+}
+
+void vnc_write(VncState *vs, const void *data, size_t len)
+{
+ buffer_reserve(&vs->output, len);
+
+ if (vs->csock != -1 && buffer_empty(&vs->output)) {
+ qemu_set_fd_handler(vs->csock, vnc_client_read, vnc_client_write, vs);
+ }
+
+ 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->csock != -1 && (vs->output.offset ||
+ vs->ws_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);
+ 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(0);
+ qemu_input_event_send_key_number(vs->vd->dcl.con, keycode, false);
+ qemu_input_event_send_key_delay(0);
+}
+
+static int current_led_state(VncState *vs)
+{
+ int ledstate = 0;
+
+ if (vs->modifiers_state[0x46]) {
+ ledstate |= QEMU_SCROLL_LOCK_LED;
+ }
+ if (vs->modifiers_state[0x45]) {
+ ledstate |= QEMU_NUM_LOCK_LED;
+ }
+ if (vs->modifiers_state[0x3a]) {
+ ledstate |= QEMU_CAPS_LOCK_LED;
+ }
+
+ return ledstate;
+}
+
+static void vnc_led_state_change(VncState *vs)
+{
+ int ledstate = 0;
+
+ if (!vnc_has_feature(vs, VNC_FEATURE_LED_STATE)) {
+ return;
+ }
+
+ ledstate = current_led_state(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, 1, 1, VNC_ENCODING_LED_STATE);
+ vnc_write_u8(vs, ledstate);
+ vnc_unlock_output(vs);
+ vnc_flush(vs);
+}
+
+static void kbd_leds(void *opaque, int ledstate)
+{
+ VncState *vs = opaque;
+ int caps, num, scr;
+ bool has_changed = (ledstate != current_led_state(vs));
+
+ trace_vnc_key_guest_leds((ledstate & QEMU_CAPS_LOCK_LED),
+ (ledstate & QEMU_NUM_LOCK_LED),
+ (ledstate & QEMU_SCROLL_LOCK_LED));
+
+ caps = ledstate & QEMU_CAPS_LOCK_LED ? 1 : 0;
+ num = ledstate & QEMU_NUM_LOCK_LED ? 1 : 0;
+ scr = ledstate & QEMU_SCROLL_LOCK_LED ? 1 : 0;
+
+ if (vs->modifiers_state[0x3a] != caps) {
+ vs->modifiers_state[0x3a] = caps;
+ }
+ if (vs->modifiers_state[0x45] != num) {
+ vs->modifiers_state[0x45] = num;
+ }
+ if (vs->modifiers_state[0x46] != scr) {
+ vs->modifiers_state[0x46] = scr;
+ }
+
+ /* Sending the current led state message to the client */
+ if (has_changed) {
+ vnc_led_state_change(vs);
+ }
+}
+
+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);
+ } 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);
+ }
+}
+
+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)
+{
+ int width = pixman_image_get_width(vs->vd->server);
+ int height = pixman_image_get_height(vs->vd->server);
+
+ vs->need_update = 1;
+
+ if (incremental) {
+ return;
+ }
+
+ vs->force_update = 1;
+ vnc_set_area_dirty(vs->dirty, width, height, 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;
+ 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 set_pixel_format(VncState *vs,
+ int bits_per_pixel, int depth,
+ 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) {
+ vnc_client_error(vs);
+ return;
+ }
+
+ 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;
+
+ 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, 5),
+ 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);
+ 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;
+
+#ifdef CONFIG_VNC_TLS
+ case VNC_AUTH_VENCRYPT:
+ VNC_DEBUG("Accept VeNCrypt auth\n");
+ start_auth_vencrypt(vs);
+ break;
+#endif /* CONFIG_VNC_TLS */
+
+#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 = pixman_image_get_width(vd->guest.fb);
+ int height = pixman_image_get_height(vd->guest.fb);
+ 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, int csock,
+ bool skipauth, bool websocket)
+{
+ VncState *vs = g_malloc0(sizeof(VncState));
+ int i;
+
+ vs->csock = csock;
+ vs->vd = vd;
+
+ 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 sock=%d ws=%d auth=%d subauth=%d\n",
+ csock, 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_malloc0(VNC_STAT_COLS * sizeof (uint8_t));
+ }
+
+ VNC_DEBUG("New client on socket %d\n", csock);
+ update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_BASE);
+ qemu_set_nonblock(vs->csock);
+ if (websocket) {
+ vs->websocket = 1;
+#ifdef CONFIG_VNC_TLS
+ if (vd->ws_tls) {
+ qemu_set_fd_handler(vs->csock, vncws_tls_handshake_io, NULL, vs);
+ } else
+#endif /* CONFIG_VNC_TLS */
+ {
+ qemu_set_fd_handler(vs->csock, vncws_handshake_read, NULL, vs);
+ }
+ } else
+ {
+ qemu_set_fd_handler(vs->csock, vnc_client_read, NULL, vs);
+ }
+
+ vnc_client_cache_addr(vs);
+ vnc_qmp_event(vs, QAPI_EVENT_VNC_CONNECTED);
+ vnc_set_share_mode(vs, VNC_SHARE_MODE_CONNECTING);
+
+ if (!vs->websocket) {
+ vnc_init_state(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_init_state(VncState *vs)
+{
+ vs->initialized = true;
+ VncDisplay *vd = vs->vd;
+
+ 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);
+
+ graphic_hw_update(vd->dcl.con);
+
+ vnc_write(vs, "RFB 003.008\n", 12);
+ vnc_flush(vs);
+ vnc_read_when(vs, protocol_version, 12);
+ reset_keys(vs);
+ if (vs->vd->lock_key_sync)
+ vs->led = qemu_add_led_event_handler(kbd_leds, vs);
+
+ vs->mouse_mode_notifier.notify = check_pointer_type_change;
+ qemu_add_mouse_mode_change_notifier(&vs->mouse_mode_notifier);
+
+ /* vs might be free()ed here */
+}
+
+static void vnc_listen_read(void *opaque, bool websocket)
+{
+ VncDisplay *vs = opaque;
+ struct sockaddr_in addr;
+ socklen_t addrlen = sizeof(addr);
+ int csock;
+
+ /* Catch-up */
+ graphic_hw_update(vs->dcl.con);
+ if (websocket) {
+ csock = qemu_accept(vs->lwebsock, (struct sockaddr *)&addr, &addrlen);
+ } else {
+ csock = qemu_accept(vs->lsock, (struct sockaddr *)&addr, &addrlen);
+ }
+
+ if (csock != -1) {
+ socket_set_nodelay(csock);
+ vnc_connect(vs, csock, false, websocket);
+ }
+}
+
+static void vnc_listen_regular_read(void *opaque)
+{
+ vnc_listen_read(opaque, false);
+}
+
+static void vnc_listen_websocket_read(void *opaque)
+{
+ vnc_listen_read(opaque, 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 *vs;
+
+ if (vnc_display_find(id) != NULL) {
+ return;
+ }
+ vs = g_malloc0(sizeof(*vs));
+
+ vs->id = strdup(id);
+ QTAILQ_INSERT_TAIL(&vnc_displays, vs, next);
+
+ vs->lsock = -1;
+ vs->lwebsock = -1;
+
+ QTAILQ_INIT(&vs->clients);
+ vs->expires = TIME_MAX;
+
+ if (keyboard_layout) {
+ trace_vnc_key_map_init(keyboard_layout);
+ vs->kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
+ } else {
+ vs->kbd_layout = init_keyboard_layout(name2keysym, "en-us");
+ }
+
+ if (!vs->kbd_layout)
+ exit(1);
+
+ qemu_mutex_init(&vs->mutex);
+ vnc_start_worker_thread();
+
+ vs->dcl.ops = &dcl_ops;
+ register_displaychangelistener(&vs->dcl);
+}
+
+
+static void vnc_display_close(VncDisplay *vs)
+{
+ if (!vs)
+ return;
+ vs->enabled = false;
+ vs->is_unix = false;
+ if (vs->lsock != -1) {
+ qemu_set_fd_handler(vs->lsock, NULL, NULL, NULL);
+ close(vs->lsock);
+ vs->lsock = -1;
+ }
+ vs->ws_enabled = false;
+ if (vs->lwebsock != -1) {
+ qemu_set_fd_handler(vs->lwebsock, NULL, NULL, NULL);
+ close(vs->lwebsock);
+ vs->lwebsock = -1;
+ }
+ vs->auth = VNC_AUTH_INVALID;
+ vs->subauth = VNC_AUTH_INVALID;
+#ifdef CONFIG_VNC_TLS
+ vs->tls.x509verify = 0;
+#endif
+}
+
+int vnc_display_password(const char *id, const char *password)
+{
+ VncDisplay *vs = vnc_display_find(id);
+
+ if (!vs) {
+ return -EINVAL;
+ }
+ if (vs->auth == VNC_AUTH_NONE) {
+ error_printf_unless_qmp("If you want use passwords please enable "
+ "password auth using '-vnc ${dpy},password'.");
+ return -EINVAL;
+ }
+
+ g_free(vs->password);
+ vs->password = g_strdup(password);
+
+ return 0;
+}
+
+int vnc_display_pw_expire(const char *id, time_t expires)
+{
+ VncDisplay *vs = vnc_display_find(id);
+
+ if (!vs) {
+ return -EINVAL;
+ }
+
+ vs->expires = expires;
+ return 0;
+}
+
+char *vnc_display_local_addr(const char *id)
+{
+ VncDisplay *vs = vnc_display_find(id);
+
+ assert(vs);
+ return vnc_socket_local_addr("%s:%s", vs->lsock);
+}
+
+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 = "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 = "sasl",
+ .type = QEMU_OPT_BOOL,
+ },{
+ .name = "tls",
+ .type = QEMU_OPT_BOOL,
+ },{
+ .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 void
+vnc_display_setup_auth(VncDisplay *vs,
+ bool password,
+ bool sasl,
+ bool tls,
+ bool x509,
+ bool websocket)
+{
+ /*
+ * 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 (password) {
+ if (tls) {
+ vs->auth = VNC_AUTH_VENCRYPT;
+ if (websocket) {
+ vs->ws_tls = true;
+ }
+ if (x509) {
+ VNC_DEBUG("Initializing VNC server with x509 password auth\n");
+ vs->subauth = VNC_AUTH_VENCRYPT_X509VNC;
+ } else {
+ VNC_DEBUG("Initializing VNC server with TLS password auth\n");
+ vs->subauth = VNC_AUTH_VENCRYPT_TLSVNC;
+ }
+ } else {
+ VNC_DEBUG("Initializing VNC server with password auth\n");
+ vs->auth = VNC_AUTH_VNC;
+ vs->subauth = VNC_AUTH_INVALID;
+ }
+ if (websocket) {
+ vs->ws_auth = VNC_AUTH_VNC;
+ } else {
+ vs->ws_auth = VNC_AUTH_INVALID;
+ }
+ } else if (sasl) {
+ if (tls) {
+ vs->auth = VNC_AUTH_VENCRYPT;
+ if (websocket) {
+ vs->ws_tls = true;
+ }
+ if (x509) {
+ VNC_DEBUG("Initializing VNC server with x509 SASL auth\n");
+ vs->subauth = VNC_AUTH_VENCRYPT_X509SASL;
+ } else {
+ VNC_DEBUG("Initializing VNC server with TLS SASL auth\n");
+ vs->subauth = VNC_AUTH_VENCRYPT_TLSSASL;
+ }
+ } else {
+ VNC_DEBUG("Initializing VNC server with SASL auth\n");
+ vs->auth = VNC_AUTH_SASL;
+ vs->subauth = VNC_AUTH_INVALID;
+ }
+ if (websocket) {
+ vs->ws_auth = VNC_AUTH_SASL;
+ } else {
+ vs->ws_auth = VNC_AUTH_INVALID;
+ }
+ } else {
+ if (tls) {
+ vs->auth = VNC_AUTH_VENCRYPT;
+ if (websocket) {
+ vs->ws_tls = true;
+ }
+ if (x509) {
+ VNC_DEBUG("Initializing VNC server with x509 no auth\n");
+ vs->subauth = VNC_AUTH_VENCRYPT_X509NONE;
+ } else {
+ VNC_DEBUG("Initializing VNC server with TLS no auth\n");
+ vs->subauth = VNC_AUTH_VENCRYPT_TLSNONE;
+ }
+ } else {
+ VNC_DEBUG("Initializing VNC server with no auth\n");
+ vs->auth = VNC_AUTH_NONE;
+ vs->subauth = VNC_AUTH_INVALID;
+ }
+ if (websocket) {
+ vs->ws_auth = VNC_AUTH_NONE;
+ } else {
+ vs->ws_auth = VNC_AUTH_INVALID;
+ }
+ }
+}
+
+void vnc_display_open(const char *id, Error **errp)
+{
+ VncDisplay *vs = vnc_display_find(id);
+ QemuOpts *opts = qemu_opts_find(&qemu_vnc_opts, id);
+ QemuOpts *sopts, *wsopts;
+ const char *share, *device_id;
+ QemuConsole *con;
+ bool password = false;
+ bool reverse = false;
+ const char *vnc;
+ const char *has_to;
+ char *h;
+ bool has_ipv4 = false;
+ bool has_ipv6 = false;
+ const char *websocket;
+ bool tls = false, x509 = false;
+#ifdef CONFIG_VNC_TLS
+ const char *path;
+#endif
+ bool sasl = false;
+#ifdef CONFIG_VNC_SASL
+ int saslErr;
+#endif
+#if defined(CONFIG_VNC_TLS) || defined(CONFIG_VNC_SASL)
+ int acl = 0;
+#endif
+ int lock_key_sync = 1;
+
+ if (!vs) {
+ error_setg(errp, "VNC display not active");
+ return;
+ }
+ vnc_display_close(vs);
+
+ if (!opts) {
+ return;
+ }
+ vnc = qemu_opt_get(opts, "vnc");
+ if (!vnc || strcmp(vnc, "none") == 0) {
+ return;
+ }
+
+ sopts = qemu_opts_create(&socket_optslist, NULL, 0, &error_abort);
+ wsopts = qemu_opts_create(&socket_optslist, NULL, 0, &error_abort);
+
+ h = strrchr(vnc, ':');
+ if (h) {
+ char *host;
+ size_t hlen = h - vnc;
+
+ if (vnc[0] == '[' && vnc[hlen - 1] == ']') {
+ host = g_strndup(vnc + 1, hlen - 2);
+ } else {
+ host = g_strndup(vnc, hlen);
+ }
+ qemu_opt_set(sopts, "host", host, &error_abort);
+ qemu_opt_set(wsopts, "host", host, &error_abort);
+ qemu_opt_set(sopts, "port", h+1, &error_abort);
+ g_free(host);
+ } else {
+ error_setg(errp, "no vnc port specified");
+ goto fail;
+ }
+
+ has_to = qemu_opt_get(opts, "to");
+ has_ipv4 = qemu_opt_get_bool(opts, "ipv4", false);
+ has_ipv6 = qemu_opt_get_bool(opts, "ipv6", false);
+ if (has_to) {
+ qemu_opt_set(sopts, "to", has_to, &error_abort);
+ qemu_opt_set(wsopts, "to", has_to, &error_abort);
+ }
+ if (has_ipv4) {
+ qemu_opt_set(sopts, "ipv4", "on", &error_abort);
+ qemu_opt_set(wsopts, "ipv4", "on", &error_abort);
+ }
+ if (has_ipv6) {
+ qemu_opt_set(sopts, "ipv6", "on", &error_abort);
+ qemu_opt_set(wsopts, "ipv6", "on", &error_abort);
+ }
+
+ 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)) {
+ 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);
+ 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 */
+ tls = qemu_opt_get_bool(opts, "tls", false);
+#ifdef CONFIG_VNC_TLS
+ path = qemu_opt_get(opts, "x509");
+ if (!path) {
+ path = qemu_opt_get(opts, "x509verify");
+ if (path) {
+ vs->tls.x509verify = true;
+ }
+ }
+ if (path) {
+ x509 = true;
+ if (vnc_tls_set_x509_creds_dir(vs, path) < 0) {
+ error_setg(errp, "Failed to find x509 certificates/keys in %s",
+ path);
+ goto fail;
+ }
+ }
+#else /* ! CONFIG_VNC_TLS */
+ if (tls) {
+ error_setg(errp, "VNC TLS auth requires gnutls support");
+ goto fail;
+ }
+#endif /* ! CONFIG_VNC_TLS */
+#if defined(CONFIG_VNC_TLS) || defined(CONFIG_VNC_SASL)
+ acl = qemu_opt_get_bool(opts, "acl", false);
+#endif
+
+ share = qemu_opt_get(opts, "share");
+ if (share) {
+ if (strcmp(share, "ignore") == 0) {
+ vs->share_policy = VNC_SHARE_POLICY_IGNORE;
+ } else if (strcmp(share, "allow-exclusive") == 0) {
+ vs->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE;
+ } else if (strcmp(share, "force-shared") == 0) {
+ vs->share_policy = VNC_SHARE_POLICY_FORCE_SHARED;
+ } else {
+ error_setg(errp, "unknown vnc share= option");
+ goto fail;
+ }
+ } else {
+ vs->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE;
+ }
+ vs->connections_limit = qemu_opt_get_number(opts, "connections", 32);
+
+ websocket = qemu_opt_get(opts, "websocket");
+ if (websocket) {
+ vs->ws_enabled = true;
+ qemu_opt_set(wsopts, "port", websocket, &error_abort);
+ if (!qcrypto_hash_supports(QCRYPTO_HASH_ALG_SHA1)) {
+ error_setg(errp, "SHA1 hash support is required for websockets");
+ goto fail;
+ }
+ }
+
+#ifdef CONFIG_VNC_JPEG
+ vs->lossy = qemu_opt_get_bool(opts, "lossy", false);
+#endif
+ vs->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 (!vs->lossy) {
+ vs->non_adaptive = true;
+ }
+
+#ifdef CONFIG_VNC_TLS
+ if (acl && x509 && vs->tls.x509verify) {
+ char *aclname;
+
+ if (strcmp(vs->id, "default") == 0) {
+ aclname = g_strdup("vnc.x509dname");
+ } else {
+ aclname = g_strdup_printf("vnc.%s.x509dname", vs->id);
+ }
+ vs->tls.acl = qemu_acl_init(aclname);
+ g_free(aclname);
+ }
+#endif
+#ifdef CONFIG_VNC_SASL
+ if (acl && sasl) {
+ char *aclname;
+
+ if (strcmp(vs->id, "default") == 0) {
+ aclname = g_strdup("vnc.username");
+ } else {
+ aclname = g_strdup_printf("vnc.%s.username", vs->id);
+ }
+ vs->sasl.acl = qemu_acl_init(aclname);
+ g_free(aclname);
+ }
+#endif
+
+ vnc_display_setup_auth(vs, password, sasl, tls, x509, websocket);
+
+#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
+ vs->lock_key_sync = lock_key_sync;
+
+ device_id = qemu_opt_get(opts, "display");
+ if (device_id) {
+ DeviceState *dev;
+ int head = qemu_opt_get_number(opts, "head", 0);
+
+ dev = qdev_find_recursive(sysbus_get_default(), device_id);
+ if (dev == NULL) {
+ error_setg(errp, "Device '%s' not found", device_id);
+ goto fail;
+ }
+
+ con = qemu_console_lookup_by_device(dev, head);
+ if (con == NULL) {
+ error_setg(errp, "Device %s is not bound to a QemuConsole",
+ device_id);
+ goto fail;
+ }
+ } else {
+ con = NULL;
+ }
+
+ if (con != vs->dcl.con) {
+ unregister_displaychangelistener(&vs->dcl);
+ vs->dcl.con = con;
+ register_displaychangelistener(&vs->dcl);
+ }
+
+ if (reverse) {
+ /* connect to viewer */
+ int csock;
+ vs->lsock = -1;
+ vs->lwebsock = -1;
+ if (strncmp(vnc, "unix:", 5) == 0) {
+ csock = unix_connect(vnc+5, errp);
+ } else {
+ csock = inet_connect(vnc, errp);
+ }
+ if (csock < 0) {
+ goto fail;
+ }
+ vnc_connect(vs, csock, false, false);
+ } else {
+ /* listen for connects */
+ if (strncmp(vnc, "unix:", 5) == 0) {
+ vs->lsock = unix_listen(vnc+5, NULL, 0, errp);
+ if (vs->lsock < 0) {
+ goto fail;
+ }
+ vs->is_unix = true;
+ } else {
+ vs->lsock = inet_listen_opts(sopts, 5900, errp);
+ if (vs->lsock < 0) {
+ goto fail;
+ }
+ if (vs->ws_enabled) {
+ vs->lwebsock = inet_listen_opts(wsopts, 0, errp);
+ if (vs->lwebsock < 0) {
+ if (vs->lsock != -1) {
+ close(vs->lsock);
+ vs->lsock = -1;
+ }
+ goto fail;
+ }
+ }
+ }
+ vs->enabled = true;
+ qemu_set_fd_handler(vs->lsock, vnc_listen_regular_read, NULL, vs);
+ if (vs->ws_enabled) {
+ qemu_set_fd_handler(vs->lwebsock, vnc_listen_websocket_read,
+ NULL, vs);
+ }
+ }
+ qemu_opts_del(sopts);
+ qemu_opts_del(wsopts);
+ return;
+
+fail:
+ qemu_opts_del(sopts);
+ qemu_opts_del(wsopts);
+ vs->enabled = false;
+ vs->ws_enabled = false;
+}
+
+void vnc_display_add_client(const char *id, int csock, bool skipauth)
+{
+ VncDisplay *vs = vnc_display_find(id);
+
+ if (!vs) {
+ return;
+ }
+ vnc_connect(vs, csock, skipauth, false);
+}
+
+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_report("Failed to start VNC server: %s",
+ error_get_pretty(local_err));
+ error_free(local_err);
+ exit(1);
+ }
+ return 0;
+}
+
+static void vnc_register_config(void)
+{
+ qemu_add_opts(&qemu_vnc_opts);
+}
+machine_init(vnc_register_config);
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-02 06:42:24 +0000