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xemu/ui/vnc.c
Daniel P. Berrange f9148c8ae7 ui: fix setup of VNC websockets auth scheme with TLS 
The way the websockets TLS code was integrated into the VNC server
made it essentially useless. The only time that the websockets TLS
support could be used is if the primary VNC server had its existing
TLS support disabled. ie QEMU had to be launched with:

  # qemu -vnc localhost:1,websockets=5902,x509=/path/to/certs

Note the absence of the 'tls' flag. This is already a bug, because
the docs indicate that 'x509' is ignored unless 'tls' is given.

If the primary VNC server had TLS turned on via the 'tls' flag,
then this prevented the websockets TLS support from being used,
because it activates the VeNCrypt auth which would have resulted
in TLS being run over a TLS session. Of course no websockets VNC
client supported VeNCrypt so in practice, since the browser clients
cannot setup a nested TLS session over the main HTTPS connection,
so it would not even get past auth.

This patch causes us to decide our auth scheme separately for the
main VNC server vs the websockets VNC server. We take account of
the fact that if TLS is enabled, then the websockets client will
use https, so setting up VeNCrypt is thus redundant as it would
lead to nested TLS sessions.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2015-03-18 09:25:13 +01:00

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/*
* 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/sockets.h"
#include "qemu/timer.h"
#include "qemu/acl.h"
#include "qemu/config-file.h"
#include "qapi/qmp/types.h"
#include "qmp-commands.h"
#include "qemu/osdep.h"
#include "ui/input.h"
#include "qapi-event.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 "d3des.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);
#ifdef CONFIG_VNC_WS
info->base->websocket = client->websocket;
#endif
#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_set(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_set(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);
}
#ifdef CONFIG_VNC_WS
if (vd->lwebsock != -1) {
info->server = qmp_query_server_entry(vd->lwebsock, true,
info->server);
}
#endif
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(struct 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_handler2(vs->csock, NULL, 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);
#ifdef CONFIG_VNC_WS
buffer_free(&vs->ws_input);
buffer_free(&vs->ws_output);
#endif /* CONFIG_VNC_WS */
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 {
#ifdef CONFIG_VNC_WS
if (vs->ws_tls.session) {
ret = vnc_client_write_tls(&vs->ws_tls.session, data, datalen);
} else
#endif /* CONFIG_VNC_WS */
#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_handler2(vs->csock, NULL, 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 */
{
#ifdef CONFIG_VNC_WS
if (vs->encode_ws) {
vnc_client_write_ws(vs);
} else
#endif /* CONFIG_VNC_WS */
{
vnc_client_write_plain(vs);
}
}
}
void vnc_client_write(void *opaque)
{
VncState *vs = opaque;
vnc_lock_output(vs);
if (vs->output.offset
#ifdef CONFIG_VNC_WS
|| vs->ws_output.offset
#endif
) {
vnc_client_write_locked(opaque);
} else if (vs->csock != -1) {
qemu_set_fd_handler2(vs->csock, NULL, 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 {
#ifdef CONFIG_VNC_WS
if (vs->ws_tls.session) {
ret = vnc_client_read_tls(&vs->ws_tls.session, data, datalen);
} else
#endif /* CONFIG_VNC_WS */
#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 */
#ifdef CONFIG_VNC_WS
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
#endif /* CONFIG_VNC_WS */
{
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_handler2(vs->csock, NULL, 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
#ifdef CONFIG_VNC_WS
|| vs->ws_output.offset
#endif
)) {
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;
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;
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;
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];
int i, j, pwlen;
unsigned char key[8];
time_t now = time(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;
deskey(key, EN0);
for (j = 0; j < VNC_AUTH_CHALLENGE_SIZE; j += 8)
des(response+j, response+j);
/* 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);
}
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);
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, min_stride, 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 = 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 {
guest_row0 = (uint8_t *)pixman_image_get_data(vd->guest.fb);
guest_stride = pixman_image_get_stride(vd->guest.fb);
}
min_stride = MIN(server_stride, guest_stride);
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 > min_stride) {
_cmp_bytes = min_stride - x * cmp_bytes;
}
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);
#ifdef CONFIG_VNC_WS
if (websocket) {
vs->websocket = 1;
#ifdef CONFIG_VNC_TLS
if (vd->ws_tls) {
qemu_set_fd_handler2(vs->csock, NULL, vncws_tls_handshake_peek,
NULL, vs);
} else
#endif /* CONFIG_VNC_TLS */
{
qemu_set_fd_handler2(vs->csock, NULL, vncws_handshake_read,
NULL, vs);
}
} else
#endif /* CONFIG_VNC_WS */
{
qemu_set_fd_handler2(vs->csock, NULL, 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);
#ifdef CONFIG_VNC_WS
if (!vs->websocket)
#endif
{
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);
#ifdef CONFIG_VNC_WS
if (websocket) {
csock = qemu_accept(vs->lwebsock, (struct sockaddr *)&addr, &addrlen);
} else
#endif /* CONFIG_VNC_WS */
{
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);
}
#ifdef CONFIG_VNC_WS
static void vnc_listen_websocket_read(void *opaque)
{
vnc_listen_read(opaque, true);
}
#endif /* CONFIG_VNC_WS */
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;
#ifdef CONFIG_VNC_WS
vs->lwebsock = -1;
#endif
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_handler2(vs->lsock, NULL, NULL, NULL, NULL);
close(vs->lsock);
vs->lsock = -1;
}
#ifdef CONFIG_VNC_WS
vs->ws_enabled = false;
if (vs->lwebsock != -1) {
qemu_set_fd_handler2(vs->lwebsock, NULL, NULL, NULL, NULL);
close(vs->lwebsock);
vs->lwebsock = -1;
}
#endif /* CONFIG_VNC_WS */
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 = g_strndup(vnc, h - vnc);
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 && 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;
}
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) {
#ifdef CONFIG_VNC_WS
vs->ws_enabled = true;
qemu_opt_set(wsopts, "port", websocket, &error_abort);
#else /* ! CONFIG_VNC_WS */
error_setg(errp, "Websockets protocol requires gnutls support");
goto fail;
#endif /* ! CONFIG_VNC_WS */
}
#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);
if (!vs->tls.acl) {
fprintf(stderr, "Failed to create x509 dname ACL\n");
exit(1);
}
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);
if (!vs->sasl.acl) {
fprintf(stderr, "Failed to create username ACL\n");
exit(1);
}
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;
#ifdef CONFIG_VNC_WS
vs->lwebsock = -1;
#endif
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);
vs->is_unix = true;
} else {
vs->lsock = inet_listen_opts(sopts, 5900, errp);
if (vs->lsock < 0) {
goto fail;
}
#ifdef CONFIG_VNC_WS
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;
}
}
#endif /* CONFIG_VNC_WS */
}
vs->enabled = true;
qemu_set_fd_handler2(vs->lsock, NULL,
vnc_listen_regular_read, NULL, vs);
#ifdef CONFIG_VNC_WS
if (vs->ws_enabled) {
qemu_set_fd_handler2(vs->lwebsock, NULL,
vnc_listen_websocket_read, NULL, vs);
}
#endif /* CONFIG_VNC_WS */
}
qemu_opts_del(sopts);
qemu_opts_del(wsopts);
return;
fail:
qemu_opts_del(sopts);
qemu_opts_del(wsopts);
vs->enabled = false;
#ifdef CONFIG_VNC_WS
vs->ws_enabled = false;
#endif /* CONFIG_VNC_WS */
}
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_func(const char *str)
{
QemuOptsList *olist = qemu_find_opts("vnc");
QemuOpts *opts = qemu_opts_parse(olist, str, 1);
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(QemuOpts *opts, void *opaque)
{
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 on `%s': %s",
qemu_opt_get(opts, "display"),
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);
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