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vnc: added initial websocket protocol support

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This patch adds basic Websocket Protocol version 13 - RFC 6455 - support
to QEMU VNC. Binary encoding support on the client side is mandatory.

Because of the GnuTLS requirement the Websockets implementation is
optional (--enable-vnc-ws).

To activate Websocket support the VNC option "websocket"is used, for
example "-vnc :0,websocket".
The listen port for Websocket connections is (5700 + display) so if
QEMU VNC is started with :0 the Websocket port would be 5700.
As an alternative the Websocket port could be manually specified by
using ",websocket=<port>" instead.

Parts of the implementation base on Anthony Liguori's QEMU Websocket
patch from 2010 and on Joel Martin's LibVNC Websocket implementation.

Signed-off-by: Tim Hardeck <thardeck@suse.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Tim Hardeck 2013-01-21 11:04:44 +01:00 committed by Anthony Liguori
parent 32ed26808d
commit 7536ee4bc3
7 changed files with 591 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
configure vendored
View File

@ -158,6 +158,7 @@ vnc_tls=""
vnc_sasl=""
vnc_jpeg=""
vnc_png=""
vnc_ws=""
xen=""
xen_ctrl_version=""
xen_pci_passthrough=""
@ -724,6 +725,10 @@ for opt do
;;
--enable-vnc-png) vnc_png="yes"
;;
--disable-vnc-ws) vnc_ws="no"
;;
--enable-vnc-ws) vnc_ws="yes"
;;
--disable-slirp) slirp="no"
;;
--disable-uuid) uuid="no"
@ -1069,6 +1074,8 @@ echo " --disable-vnc-jpeg disable JPEG lossy compression for VNC server"
echo " --enable-vnc-jpeg enable JPEG lossy compression for VNC server"
echo " --disable-vnc-png disable PNG compression for VNC server (default)"
echo " --enable-vnc-png enable PNG compression for VNC server"
echo " --disable-vnc-ws disable Websockets support for VNC server"
echo " --enable-vnc-ws enable Websockets support for VNC server"
echo " --disable-curses disable curses output"
echo " --enable-curses enable curses output"
echo " --disable-curl disable curl connectivity"
@ -1712,8 +1719,8 @@ EOF
fi
##########################################
# VNC TLS detection
if test "$vnc" = "yes" -a "$vnc_tls" != "no" ; then
# VNC TLS/WS detection
if test "$vnc" = "yes" -a \( "$vnc_tls" != "no" -o "$vnc_ws" != "no" \) ; then
cat > $TMPC <<EOF
#include <gnutls/gnutls.h>
int main(void) { gnutls_session_t s; gnutls_init(&s, GNUTLS_SERVER); return 0; }
@ -1721,14 +1728,23 @@ EOF
vnc_tls_cflags=`$pkg_config --cflags gnutls 2> /dev/null`
vnc_tls_libs=`$pkg_config --libs gnutls 2> /dev/null`
if compile_prog "$vnc_tls_cflags" "$vnc_tls_libs" ; then
vnc_tls=yes
if test "$vnc_tls" != "no" ; then
vnc_tls=yes
fi
if test "$vnc_ws" != "no" ; then
vnc_ws=yes
fi
libs_softmmu="$vnc_tls_libs $libs_softmmu"
QEMU_CFLAGS="$QEMU_CFLAGS $vnc_tls_cflags"
else
if test "$vnc_tls" = "yes" ; then
feature_not_found "vnc-tls"
fi
if test "$vnc_ws" = "yes" ; then
feature_not_found "vnc-ws"
fi
vnc_tls=no
vnc_ws=no
fi
fi
@ -3283,6 +3299,7 @@ if test "$vnc" = "yes" ; then
echo "VNC SASL support $vnc_sasl"
echo "VNC JPEG support $vnc_jpeg"
echo "VNC PNG support $vnc_png"
echo "VNC WS support $vnc_ws"
fi
if test -n "$sparc_cpu"; then
echo "Target Sparc Arch $sparc_cpu"
@ -3461,6 +3478,10 @@ fi
if test "$vnc_png" = "yes" ; then
echo "CONFIG_VNC_PNG=y" >> $config_host_mak
fi
if test "$vnc_ws" = "yes" ; then
echo "CONFIG_VNC_WS=y" >> $config_host_mak
echo "VNC_WS_CFLAGS=$vnc_ws_cflags" >> $config_host_mak
fi
if test "$fnmatch" = "yes" ; then
echo "CONFIG_FNMATCH=y" >> $config_host_mak
fi

8
qemu-options.hx
View File

@ -1096,6 +1096,14 @@ client is specified by the @var{display}. For reverse network
connections (@var{host}:@var{d},@code{reverse}), the @var{d} argument
is a TCP port number, not a display number.
@item websocket
Opens an additional TCP listening port dedicated to VNC Websocket connections.
By defintion the Websocket port is 5700+@var{display}. If @var{host} is
specified connections will only be allowed from this host.
As an alternative the Websocket port could be specified by using
@code{websocket}=@var{port}.
@item password
Require that password based authentication is used for client connections.

1
ui/Makefile.objs
View File

@ -4,6 +4,7 @@ vnc-obj-y += vnc-enc-tight.o vnc-palette.o
vnc-obj-y += vnc-enc-zrle.o
vnc-obj-$(CONFIG_VNC_TLS) += vnc-tls.o vnc-auth-vencrypt.o
vnc-obj-$(CONFIG_VNC_SASL) += vnc-auth-sasl.o
vnc-obj-$(CONFIG_VNC_WS) += vnc-ws.o
vnc-obj-y += vnc-jobs.o
common-obj-y += keymaps.o console.o cursor.o input.o qemu-pixman.o

284
ui/vnc-ws.c Normal file
View File

@ -0,0 +1,284 @@
/*
* QEMU VNC display driver: Websockets support
*
* Copyright (C) 2010 Joel Martin
* Copyright (C) 2012 Tim Hardeck
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, see <http://www.gnu.org/licenses/>.
*/
#include "vnc.h"
void vncws_handshake_read(void *opaque)
{
VncState *vs = opaque;
uint8_t *handshake_end;
long ret;
buffer_reserve(&vs->ws_input, 4096);
ret = vnc_client_read_buf(vs, buffer_end(&vs->ws_input), 4096);
if (!ret) {
if (vs->csock == -1) {
vnc_disconnect_finish(vs);
}
return;
}
vs->ws_input.offset += ret;
handshake_end = (uint8_t *)g_strstr_len((char *)vs->ws_input.buffer,
vs->ws_input.offset, WS_HANDSHAKE_END);
if (handshake_end) {
qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs);
vncws_process_handshake(vs, vs->ws_input.buffer, vs->ws_input.offset);
buffer_advance(&vs->ws_input, handshake_end - vs->ws_input.buffer +
strlen(WS_HANDSHAKE_END));
}
}
long vnc_client_read_ws(VncState *vs)
{
int ret, err;
uint8_t *payload;
size_t payload_size, frame_size;
VNC_DEBUG("Read websocket %p size %zd offset %zd\n", vs->ws_input.buffer,
vs->ws_input.capacity, vs->ws_input.offset);
buffer_reserve(&vs->ws_input, 4096);
ret = vnc_client_read_buf(vs, buffer_end(&vs->ws_input), 4096);
if (!ret) {
return 0;
}
vs->ws_input.offset += ret;
/* make sure that nothing is left in the ws_input buffer */
do {
err = vncws_decode_frame(&vs->ws_input, &payload,
&payload_size, &frame_size);
if (err <= 0) {
return err;
}
buffer_reserve(&vs->input, payload_size);
buffer_append(&vs->input, payload, payload_size);
buffer_advance(&vs->ws_input, frame_size);
} while (vs->ws_input.offset > 0);
return ret;
}
long vnc_client_write_ws(VncState *vs)
{
long ret;
VNC_DEBUG("Write WS: Pending output %p size %zd offset %zd\n",
vs->output.buffer, vs->output.capacity, vs->output.offset);
vncws_encode_frame(&vs->ws_output, vs->output.buffer, vs->output.offset);
buffer_reset(&vs->output);
ret = vnc_client_write_buf(vs, vs->ws_output.buffer, vs->ws_output.offset);
if (!ret) {
return 0;
}
buffer_advance(&vs->ws_output, ret);
if (vs->ws_output.offset == 0) {
qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs);
}
return ret;
}
static char *vncws_extract_handshake_entry(const char *handshake,
size_t handshake_len, const char *name)
{
char *begin, *end, *ret = NULL;
char *line = g_strdup_printf("%s%s: ", WS_HANDSHAKE_DELIM, name);
begin = g_strstr_len(handshake, handshake_len, line);
if (begin != NULL) {
begin += strlen(line);
end = g_strstr_len(begin, handshake_len - (begin - handshake),
WS_HANDSHAKE_DELIM);
if (end != NULL) {
ret = g_strndup(begin, end - begin);
}
}
g_free(line);
return ret;
}
static void vncws_send_handshake_response(VncState *vs, const char* key)
{
char combined_key[WS_CLIENT_KEY_LEN + WS_GUID_LEN + 1];
char hash[SHA1_DIGEST_LEN];
size_t hash_size = SHA1_DIGEST_LEN;
char *accept = NULL, *response = NULL;
gnutls_datum_t in;
g_strlcpy(combined_key, key, WS_CLIENT_KEY_LEN + 1);
g_strlcat(combined_key, WS_GUID, WS_CLIENT_KEY_LEN + WS_GUID_LEN + 1);
/* hash and encode it */
in.data = (void *)combined_key;
in.size = WS_CLIENT_KEY_LEN + WS_GUID_LEN;
if (gnutls_fingerprint(GNUTLS_DIG_SHA1, &in, hash, &hash_size)
== GNUTLS_E_SUCCESS) {
accept = g_base64_encode((guchar *)hash, SHA1_DIGEST_LEN);
}
if (accept == NULL) {
VNC_DEBUG("Hashing Websocket combined key failed\n");
vnc_client_error(vs);
return;
}
response = g_strdup_printf(WS_HANDSHAKE, accept);
vnc_write(vs, response, strlen(response));
vnc_flush(vs);
g_free(accept);
g_free(response);
vs->encode_ws = 1;
vnc_init_state(vs);
}
void vncws_process_handshake(VncState *vs, uint8_t *line, size_t size)
{
char *protocols = vncws_extract_handshake_entry((const char *)line, size,
"Sec-WebSocket-Protocol");
char *version = vncws_extract_handshake_entry((const char *)line, size,
"Sec-WebSocket-Version");
char *key = vncws_extract_handshake_entry((const char *)line, size,
"Sec-WebSocket-Key");
if (protocols && version && key
&& g_strrstr(protocols, "binary")
&& !strcmp(version, WS_SUPPORTED_VERSION)
&& strlen(key) == WS_CLIENT_KEY_LEN) {
vncws_send_handshake_response(vs, key);
} else {
VNC_DEBUG("Defective Websockets header or unsupported protocol\n");
vnc_client_error(vs);
}
g_free(protocols);
g_free(version);
g_free(key);
}
void vncws_encode_frame(Buffer *output, const void *payload,
const size_t payload_size)
{
size_t header_size = 0;
unsigned char opcode = WS_OPCODE_BINARY_FRAME;
union {
char buf[WS_HEAD_MAX_LEN];
WsHeader ws;
} header;
if (!payload_size) {
return;
}
header.ws.b0 = 0x80 | (opcode & 0x0f);
if (payload_size <= 125) {
header.ws.b1 = (uint8_t)payload_size;
header_size = 2;
} else if (payload_size < 65536) {
header.ws.b1 = 0x7e;
header.ws.u.s16.l16 = cpu_to_be16((uint16_t)payload_size);
header_size = 4;
} else {
header.ws.b1 = 0x7f;
header.ws.u.s64.l64 = cpu_to_be64(payload_size);
header_size = 10;
}
buffer_reserve(output, header_size + payload_size);
buffer_append(output, header.buf, header_size);
buffer_append(output, payload, payload_size);
}
int vncws_decode_frame(Buffer *input, uint8_t **payload,
size_t *payload_size, size_t *frame_size)
{
unsigned char opcode = 0, fin = 0, has_mask = 0;
size_t header_size = 0;
uint32_t *payload32;
WsHeader *header = (WsHeader *)input->buffer;
WsMask mask;
int i;
if (input->offset < WS_HEAD_MIN_LEN + 4) {
/* header not complete */
return 0;
}
fin = (header->b0 & 0x80) >> 7;
opcode = header->b0 & 0x0f;
has_mask = (header->b1 & 0x80) >> 7;
*payload_size = header->b1 & 0x7f;
if (opcode == WS_OPCODE_CLOSE) {
/* disconnect */
return -1;
}
/* Websocket frame sanity check:
* * Websocket fragmentation is not supported.
* * All websockets frames sent by a client have to be masked.
* * Only binary encoding is supported.
*/
if (!fin || !has_mask || opcode != WS_OPCODE_BINARY_FRAME) {
VNC_DEBUG("Received faulty/unsupported Websocket frame\n");
return -2;
}
if (*payload_size < 126) {
header_size = 6;
mask = header->u.m;
} else if (*payload_size == 126 && input->offset >= 8) {
*payload_size = be16_to_cpu(header->u.s16.l16);
header_size = 8;
mask = header->u.s16.m16;
} else if (*payload_size == 127 && input->offset >= 14) {
*payload_size = be64_to_cpu(header->u.s64.l64);
header_size = 14;
mask = header->u.s64.m64;
} else {
/* header not complete */
return 0;
}
*frame_size = header_size + *payload_size;
if (input->offset < *frame_size) {
/* frame not complete */
return 0;
}
*payload = input->buffer + header_size;
/* unmask frame */
/* process 1 frame (32 bit op) */
payload32 = (uint32_t *)(*payload);
for (i = 0; i < *payload_size / 4; i++) {
payload32[i] ^= mask.u;
}
/* process the remaining bytes (if any) */
for (i *= 4; i < *payload_size; i++) {
(*payload)[i] ^= mask.c[i % 4];
}
return 1;
}

86
ui/vnc-ws.h Normal file
View File

@ -0,0 +1,86 @@
/*
* QEMU VNC display driver: Websockets support
*
* Copyright (C) 2010 Joel Martin
* Copyright (C) 2012 Tim Hardeck
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __QEMU_UI_VNC_WS_H
#define __QEMU_UI_VNC_WS_H
#include <gnutls/gnutls.h>
#define B64LEN(__x) (((__x + 2) / 3) * 12 / 3)
#define SHA1_DIGEST_LEN 20
#define WS_ACCEPT_LEN (B64LEN(SHA1_DIGEST_LEN) + 1)
#define WS_CLIENT_KEY_LEN 24
#define WS_GUID "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
#define WS_GUID_LEN strlen(WS_GUID)
#define WS_HANDSHAKE "HTTP/1.1 101 Switching Protocols\r\n\
Upgrade: websocket\r\n\
Connection: Upgrade\r\n\
Sec-WebSocket-Accept: %s\r\n\
Sec-WebSocket-Protocol: binary\r\n\
\r\n"
#define WS_HANDSHAKE_DELIM "\r\n"
#define WS_HANDSHAKE_END "\r\n\r\n"
#define WS_SUPPORTED_VERSION "13"
#define WS_HEAD_MIN_LEN sizeof(uint16_t)
#define WS_HEAD_MAX_LEN (WS_HEAD_MIN_LEN + sizeof(uint64_t) + sizeof(uint32_t))
typedef union WsMask {
char c[4];
uint32_t u;
} WsMask;
typedef struct QEMU_PACKED WsHeader {
unsigned char b0;
unsigned char b1;
union {
struct QEMU_PACKED {
uint16_t l16;
WsMask m16;
} s16;
struct QEMU_PACKED {
uint64_t l64;
WsMask m64;
} s64;
WsMask m;
} u;
} WsHeader;
enum {
WS_OPCODE_CONTINUATION = 0x0,
WS_OPCODE_TEXT_FRAME = 0x1,
WS_OPCODE_BINARY_FRAME = 0x2,
WS_OPCODE_CLOSE = 0x8,
WS_OPCODE_PING = 0x9,
WS_OPCODE_PONG = 0xA
};
void vncws_handshake_read(void *opaque);
long vnc_client_write_ws(VncState *vs);
long vnc_client_read_ws(VncState *vs);
void vncws_process_handshake(VncState *vs, uint8_t *line, size_t size);
void vncws_encode_frame(Buffer *output, const void *payload,
const size_t payload_size);
int vncws_decode_frame(Buffer *input, uint8_t **payload,
size_t *payload_size, size_t *frame_size);
#endif /* __QEMU_UI_VNC_WS_H */

187
ui/vnc.c
View File

@ -420,7 +420,6 @@ out_error:
static int vnc_update_client(VncState *vs, int has_dirty);
static int vnc_update_client_sync(VncState *vs, int has_dirty);
static void vnc_disconnect_start(VncState *vs);
static void vnc_disconnect_finish(VncState *vs);
static void vnc_init_timer(VncDisplay *vd);
static void vnc_remove_timer(VncDisplay *vd);
@ -486,7 +485,7 @@ static int buffer_empty(Buffer *buffer)
return buffer->offset == 0;
}
static uint8_t *buffer_end(Buffer *buffer)
uint8_t *buffer_end(Buffer *buffer)
{
return buffer->buffer + buffer->offset;
}
@ -1023,7 +1022,7 @@ static void vnc_disconnect_start(VncState *vs)
vs->csock = -1;
}
static void vnc_disconnect_finish(VncState *vs)
void vnc_disconnect_finish(VncState *vs)
{
int i;
@ -1034,6 +1033,10 @@ static void vnc_disconnect_finish(VncState *vs)
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 */
qobject_decref(vs->info);
@ -1199,7 +1202,16 @@ static void vnc_client_write_locked(void *opaque)
vnc_client_write_sasl(vs);
} else
#endif /* CONFIG_VNC_SASL */
vnc_client_write_plain(vs);
{
#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)
@ -1207,7 +1219,11 @@ void vnc_client_write(void *opaque)
VncState *vs = opaque;
vnc_lock_output(vs);
if (vs->output.offset) {
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);
@ -1301,7 +1317,21 @@ void vnc_client_read(void *opaque)
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);
@ -1372,7 +1402,11 @@ void vnc_write_u8(VncState *vs, uint8_t value)
void vnc_flush(VncState *vs)
{
vnc_lock_output(vs);
if (vs->csock != -1 && vs->output.offset) {
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);
@ -2662,7 +2696,7 @@ static void vnc_remove_timer(VncDisplay *vd)
}
}
static void vnc_connect(VncDisplay *vd, int csock, int skipauth)
static void vnc_connect(VncDisplay *vd, int csock, int skipauth, bool websocket)
{
VncState *vs = g_malloc0(sizeof(VncState));
int i;
@ -2689,13 +2723,34 @@ static void vnc_connect(VncDisplay *vd, int csock, int skipauth)
VNC_DEBUG("New client on socket %d\n", csock);
dcl->idle = 0;
socket_set_nonblock(vs->csock);
qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs);
#ifdef CONFIG_VNC_WS
if (websocket) {
vs->websocket = 1;
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, QEVENT_VNC_CONNECTED);
vnc_set_share_mode(vs, VNC_SHARE_MODE_CONNECTING);
vs->vd = vd;
#ifdef CONFIG_VNC_WS
if (!vs->websocket)
#endif
{
vnc_init_state(vs);
}
}
void vnc_init_state(VncState *vs)
{
VncDisplay *vd = vs->vd;
vs->ds = vd->ds;
vs->last_x = -1;
vs->last_y = -1;
@ -2727,21 +2782,41 @@ static void vnc_connect(VncDisplay *vd, int csock, int skipauth)
/* vs might be free()ed here */
}
static void vnc_listen_read(void *opaque)
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 */
vga_hw_update();
#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);
}
int csock = qemu_accept(vs->lsock, (struct sockaddr *)&addr, &addrlen);
if (csock != -1) {
vnc_connect(vs, csock, 0);
vnc_connect(vs, csock, 0, websocket);
}
}
static void vnc_listen_regular_read(void *opaque)
{
vnc_listen_read(opaque, 0);
}
#ifdef CONFIG_VNC_WS
static void vnc_listen_websocket_read(void *opaque)
{
vnc_listen_read(opaque, 1);
}
#endif /* CONFIG_VNC_WS */
void vnc_display_init(DisplayState *ds)
{
VncDisplay *vs = g_malloc0(sizeof(*vs));
@ -2753,6 +2828,9 @@ void vnc_display_init(DisplayState *ds)
vnc_display = vs;
vs->lsock = -1;
#ifdef CONFIG_VNC_WS
vs->lwebsock = -1;
#endif
vs->ds = ds;
QTAILQ_INIT(&vs->clients);
@ -2794,6 +2872,15 @@ static void vnc_display_close(DisplayState *ds)
close(vs->lsock);
vs->lsock = -1;
}
#ifdef CONFIG_VNC_WS
g_free(vs->ws_display);
vs->ws_display = NULL;
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;
#ifdef CONFIG_VNC_TLS
vs->subauth = VNC_AUTH_INVALID;
@ -2915,6 +3002,36 @@ void vnc_display_open(DisplayState *ds, const char *display, Error **errp)
} else if (strncmp(options, "sasl", 4) == 0) {
sasl = 1; /* Require SASL auth */
#endif
#ifdef CONFIG_VNC_WS
} else if (strncmp(options, "websocket", 9) == 0) {
char *start, *end;
vs->websocket = 1;
/* Check for 'websocket=<port>' */
start = strchr(options, '=');
end = strchr(options, ',');
if (start && (!end || (start < end))) {
int len = end ? end-(start+1) : strlen(start+1);
if (len < 6) {
/* extract the host specification from display */
char *host = NULL, *port = NULL, *host_end = NULL;
port = g_strndup(start + 1, len);
/* ipv6 hosts have colons */
end = strchr(display, ',');
host_end = g_strrstr_len(display, end - display, ":");
if (host_end) {
host = g_strndup(display, host_end - display + 1);
} else {
host = g_strndup(":", 1);
}
vs->ws_display = g_strconcat(host, port, NULL);
g_free(host);
g_free(port);
}
}
#endif /* CONFIG_VNC_WS */
#ifdef CONFIG_VNC_TLS
} else if (strncmp(options, "tls", 3) == 0) {
tls = 1; /* Require TLS */
@ -3073,6 +3190,9 @@ void vnc_display_open(DisplayState *ds, const char *display, Error **errp)
/* connect to viewer */
int csock;
vs->lsock = -1;
#ifdef CONFIG_VNC_WS
vs->lwebsock = -1;
#endif
if (strncmp(display, "unix:", 5) == 0) {
csock = unix_connect(display+5, errp);
} else {
@ -3081,7 +3201,7 @@ void vnc_display_open(DisplayState *ds, const char *display, Error **errp)
if (csock < 0) {
goto fail;
}
vnc_connect(vs, csock, 0);
vnc_connect(vs, csock, 0, 0);
} else {
/* listen for connects */
char *dpy;
@ -3092,25 +3212,56 @@ void vnc_display_open(DisplayState *ds, const char *display, Error **errp)
} else {
vs->lsock = inet_listen(display, dpy, 256,
SOCK_STREAM, 5900, errp);
}
if (vs->lsock < 0) {
g_free(dpy);
goto fail;
if (vs->lsock < 0) {
g_free(dpy);
goto fail;
}
#ifdef CONFIG_VNC_WS
if (vs->websocket) {
if (vs->ws_display) {
vs->lwebsock = inet_listen(vs->ws_display, NULL, 256,
SOCK_STREAM, 0, errp);
} else {
vs->lwebsock = inet_listen(vs->display, NULL, 256,
SOCK_STREAM, 5700, errp);
}
if (vs->lwebsock < 0) {
if (vs->lsock) {
close(vs->lsock);
vs->lsock = -1;
}
g_free(dpy);
goto fail;
}
}
#endif /* CONFIG_VNC_WS */
}
g_free(vs->display);
vs->display = dpy;
qemu_set_fd_handler2(vs->lsock, NULL, vnc_listen_read, NULL, vs);
qemu_set_fd_handler2(vs->lsock, NULL,
vnc_listen_regular_read, NULL, vs);
#ifdef CONFIG_VNC_WS
if (vs->websocket) {
qemu_set_fd_handler2(vs->lwebsock, NULL,
vnc_listen_websocket_read, NULL, vs);
}
#endif /* CONFIG_VNC_WS */
}
return;
fail:
g_free(vs->display);
vs->display = NULL;
#ifdef CONFIG_VNC_WS
g_free(vs->ws_display);
vs->ws_display = NULL;
#endif /* CONFIG_VNC_WS */
}
void vnc_display_add_client(DisplayState *ds, int csock, int skipauth)
{
VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
vnc_connect(vs, csock, skipauth);
vnc_connect(vs, csock, skipauth, 0);
}

19
ui/vnc.h
View File

@ -99,6 +99,9 @@ typedef struct VncDisplay VncDisplay;
#ifdef CONFIG_VNC_SASL
#include "vnc-auth-sasl.h"
#endif
#ifdef CONFIG_VNC_WS
#include "vnc-ws.h"
#endif
struct VncRectStat
{
@ -142,6 +145,11 @@ struct VncDisplay
QEMUTimer *timer;
int timer_interval;
int lsock;
#ifdef CONFIG_VNC_WS
int lwebsock;
bool websocket;
char *ws_display;
#endif
DisplayState *ds;
kbd_layout_t *kbd_layout;
int lock_key_sync;
@ -269,11 +277,19 @@ struct VncState
#ifdef CONFIG_VNC_SASL
VncStateSASL sasl;
#endif
#ifdef CONFIG_VNC_WS
bool encode_ws;
bool websocket;
#endif
QObject *info;
Buffer output;
Buffer input;
#ifdef CONFIG_VNC_WS
Buffer ws_input;
Buffer ws_output;
#endif
/* current output mode information */
VncWritePixels *write_pixels;
PixelFormat client_pf;
@ -493,6 +509,8 @@ void vnc_write_u16(VncState *vs, uint16_t value);
void vnc_write_u8(VncState *vs, uint8_t value);
void vnc_flush(VncState *vs);
void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
void vnc_disconnect_finish(VncState *vs);
void vnc_init_state(VncState *vs);
/* Buffer I/O functions */
@ -511,6 +529,7 @@ void buffer_reset(Buffer *buffer);
void buffer_free(Buffer *buffer);
void buffer_append(Buffer *buffer, const void *data, size_t len);
void buffer_advance(Buffer *buf, size_t len);
uint8_t *buffer_end(Buffer *buffer);
/* Misc helpers */