auto import from //depot/cupcake/@135843

1 files changed, 2446 insertions, 0 deletions

diff --git a/vnc.c b/vnc.c
new file mode 100644
index 0000000..8b7d19f
--- /dev/null
+++ b/vnc.c
@@ -0,0 +1,2446 @@
+/*
+ * QEMU VNC display driver
+ *
+ * Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>
+ * Copyright (C) 2006 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu-common.h"
+#include "console.h"
+#include "sysemu.h"
+#include "qemu_socket.h"
+#include "qemu-timer.h"
+
+#define VNC_REFRESH_INTERVAL (1000 / 30)
+
+#include "vnc_keysym.h"
+#include "keymaps.c"
+#include "d3des.h"
+
+#ifdef CONFIG_VNC_TLS
+#include <gnutls/gnutls.h>
+#include <gnutls/x509.h>
+#endif /* CONFIG_VNC_TLS */
+
+// #define _VNC_DEBUG 1
+
+#ifdef _VNC_DEBUG
+#define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
+
+#if CONFIG_VNC_TLS && _VNC_DEBUG >= 2
+/* Very verbose, so only enabled for _VNC_DEBUG >= 2 */
+static void vnc_debug_gnutls_log(int level, const char* str) {
+    VNC_DEBUG("%d %s", level, str);
+}
+#endif /* CONFIG_VNC_TLS && _VNC_DEBUG */
+#else
+#define VNC_DEBUG(fmt, ...) do { } while (0)
+#endif
+
+
+typedef struct Buffer
+{
+    size_t capacity;
+    size_t offset;
+    uint8_t *buffer;
+} Buffer;
+
+typedef struct VncState VncState;
+
+typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len);
+
+typedef void VncWritePixels(VncState *vs, void *data, int size);
+
+typedef void VncSendHextileTile(VncState *vs,
+                                int x, int y, int w, int h,
+                                void *last_bg,
+                                void *last_fg,
+                                int *has_bg, int *has_fg);
+
+#define VNC_MAX_WIDTH 2048
+#define VNC_MAX_HEIGHT 2048
+#define VNC_DIRTY_WORDS (VNC_MAX_WIDTH / (16 * 32))
+
+#define VNC_AUTH_CHALLENGE_SIZE 16
+
+enum {
+    VNC_AUTH_INVALID = 0,
+    VNC_AUTH_NONE = 1,
+    VNC_AUTH_VNC = 2,
+    VNC_AUTH_RA2 = 5,
+    VNC_AUTH_RA2NE = 6,
+    VNC_AUTH_TIGHT = 16,
+    VNC_AUTH_ULTRA = 17,
+    VNC_AUTH_TLS = 18,
+    VNC_AUTH_VENCRYPT = 19
+};
+
+#ifdef CONFIG_VNC_TLS
+enum {
+    VNC_WIREMODE_CLEAR,
+    VNC_WIREMODE_TLS,
+};
+
+enum {
+    VNC_AUTH_VENCRYPT_PLAIN = 256,
+    VNC_AUTH_VENCRYPT_TLSNONE = 257,
+    VNC_AUTH_VENCRYPT_TLSVNC = 258,
+    VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
+    VNC_AUTH_VENCRYPT_X509NONE = 260,
+    VNC_AUTH_VENCRYPT_X509VNC = 261,
+    VNC_AUTH_VENCRYPT_X509PLAIN = 262,
+};
+
+#define X509_CA_CERT_FILE "ca-cert.pem"
+#define X509_CA_CRL_FILE "ca-crl.pem"
+#define X509_SERVER_KEY_FILE "server-key.pem"
+#define X509_SERVER_CERT_FILE "server-cert.pem"
+
+#endif /* CONFIG_VNC_TLS */
+
+struct VncState
+{
+    QEMUTimer *timer;
+    int lsock;
+    int csock;
+    DisplayState *ds;
+    int need_update;
+    int width;
+    int height;
+    uint32_t dirty_row[VNC_MAX_HEIGHT][VNC_DIRTY_WORDS];
+    char *old_data;
+    int depth; /* internal VNC frame buffer byte per pixel */
+    int has_resize;
+    int has_hextile;
+    int has_pointer_type_change;
+    int has_WMVi;
+    int absolute;
+    int last_x;
+    int last_y;
+
+    int major;
+    int minor;
+
+    char *display;
+    char *password;
+    int auth;
+#ifdef CONFIG_VNC_TLS
+    int subauth;
+    int x509verify;
+
+    char *x509cacert;
+    char *x509cacrl;
+    char *x509cert;
+    char *x509key;
+#endif
+    char challenge[VNC_AUTH_CHALLENGE_SIZE];
+
+#ifdef CONFIG_VNC_TLS
+    int wiremode;
+    gnutls_session_t tls_session;
+#endif
+
+    Buffer output;
+    Buffer input;
+    kbd_layout_t *kbd_layout;
+    /* current output mode information */
+    VncWritePixels *write_pixels;
+    VncSendHextileTile *send_hextile_tile;
+    int pix_bpp, pix_big_endian;
+    int client_red_shift, client_red_max, server_red_shift, server_red_max;
+    int client_green_shift, client_green_max, server_green_shift, server_green_max;
+    int client_blue_shift, client_blue_max, server_blue_shift, server_blue_max;
+
+    VncReadEvent *read_handler;
+    size_t read_handler_expect;
+    /* input */
+    uint8_t modifiers_state[256];
+};
+
+static VncState *vnc_state; /* needed for info vnc */
+
+void do_info_vnc(void)
+{
+    if (vnc_state == NULL)
+	term_printf("VNC server disabled\n");
+    else {
+	term_printf("VNC server active on: ");
+	term_print_filename(vnc_state->display);
+	term_printf("\n");
+
+	if (vnc_state->csock == -1)
+	    term_printf("No client connected\n");
+	else
+	    term_printf("Client connected\n");
+    }
+}
+
+/* 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 void vnc_write(VncState *vs, const void *data, size_t len);
+static void vnc_write_u32(VncState *vs, uint32_t value);
+static void vnc_write_s32(VncState *vs, int32_t value);
+static void vnc_write_u16(VncState *vs, uint16_t value);
+static void vnc_write_u8(VncState *vs, uint8_t value);
+static void vnc_flush(VncState *vs);
+static void vnc_update_client(void *opaque);
+static void vnc_client_read(void *opaque);
+
+static void vnc_colordepth(DisplayState *ds, int depth);
+
+static inline void vnc_set_bit(uint32_t *d, int k)
+{
+    d[k >> 5] |= 1 << (k & 0x1f);
+}
+
+static inline void vnc_clear_bit(uint32_t *d, int k)
+{
+    d[k >> 5] &= ~(1 << (k & 0x1f));
+}
+
+static inline void vnc_set_bits(uint32_t *d, int n, int nb_words)
+{
+    int j;
+
+    j = 0;
+    while (n >= 32) {
+        d[j++] = -1;
+        n -= 32;
+    }
+    if (n > 0)
+        d[j++] = (1 << n) - 1;
+    while (j < nb_words)
+        d[j++] = 0;
+}
+
+static inline int vnc_get_bit(const uint32_t *d, int k)
+{
+    return (d[k >> 5] >> (k & 0x1f)) & 1;
+}
+
+static inline int vnc_and_bits(const uint32_t *d1, const uint32_t *d2,
+                               int nb_words)
+{
+    int i;
+    for(i = 0; i < nb_words; i++) {
+        if ((d1[i] & d2[i]) != 0)
+            return 1;
+    }
+    return 0;
+}
+
+static void vnc_dpy_update(DisplayState *ds, int x, int y, int w, int h)
+{
+    VncState *vs = ds->opaque;
+    int i;
+
+    h += y;
+
+    /* round x down to ensure the loop only spans one 16-pixel block per,
+       iteration.  otherwise, if (x % 16) != 0, the last iteration may span
+       two 16-pixel blocks but we only mark the first as dirty
+    */
+    w += (x % 16);
+    x -= (x % 16);
+
+    x = MIN(x, vs->width);
+    y = MIN(y, vs->height);
+    w = MIN(x + w, vs->width) - x;
+    h = MIN(h, vs->height);
+
+    for (; y < h; y++)
+	for (i = 0; i < w; i += 16)
+	    vnc_set_bit(vs->dirty_row[y], (x + i) / 16);
+}
+
+static void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
+				   int32_t encoding)
+{
+    vnc_write_u16(vs, x);
+    vnc_write_u16(vs, y);
+    vnc_write_u16(vs, w);
+    vnc_write_u16(vs, h);
+
+    vnc_write_s32(vs, encoding);
+}
+
+static void vnc_dpy_resize(DisplayState *ds, int w, int h)
+{
+    int size_changed;
+    VncState *vs = ds->opaque;
+
+    ds->data = qemu_realloc(ds->data, w * h * vs->depth);
+    vs->old_data = qemu_realloc(vs->old_data, w * h * vs->depth);
+
+    if (ds->data == NULL || vs->old_data == NULL) {
+	fprintf(stderr, "vnc: memory allocation failed\n");
+	exit(1);
+    }
+
+    if (ds->depth != vs->depth * 8) {
+        ds->depth = vs->depth * 8;
+        console_color_init(ds);
+    }
+    size_changed = ds->width != w || ds->height != h;
+    ds->width = w;
+    ds->height = h;
+    ds->linesize = w * vs->depth;
+    if (size_changed) {
+        vs->width = ds->width;
+        vs->height = ds->height;
+        if (vs->csock != -1 && vs->has_resize) {
+            vnc_write_u8(vs, 0);  /* msg id */
+            vnc_write_u8(vs, 0);
+            vnc_write_u16(vs, 1); /* number of rects */
+            vnc_framebuffer_update(vs, 0, 0, ds->width, ds->height, -223);
+            vnc_flush(vs);
+        }
+    }
+
+    memset(vs->dirty_row, 0xFF, sizeof(vs->dirty_row));
+    memset(vs->old_data, 42, vs->ds->linesize * vs->ds->height);
+}
+
+/* fastest code */
+static void vnc_write_pixels_copy(VncState *vs, void *pixels, int size)
+{
+    vnc_write(vs, pixels, size);
+}
+
+/* slowest but generic code. */
+static void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v)
+{
+    uint8_t r, g, b;
+
+    r = ((v >> vs->server_red_shift) & vs->server_red_max) * (vs->client_red_max + 1) /
+        (vs->server_red_max + 1);
+    g = ((v >> vs->server_green_shift) & vs->server_green_max) * (vs->client_green_max + 1) /
+        (vs->server_green_max + 1);
+    b = ((v >> vs->server_blue_shift) & vs->server_blue_max) * (vs->client_blue_max + 1) /
+        (vs->server_blue_max + 1);
+    v = (r << vs->client_red_shift) |
+        (g << vs->client_green_shift) |
+        (b << vs->client_blue_shift);
+    switch(vs->pix_bpp) {
+    case 1:
+        buf[0] = v;
+        break;
+    case 2:
+        if (vs->pix_big_endian) {
+            buf[0] = v >> 8;
+            buf[1] = v;
+        } else {
+            buf[1] = v >> 8;
+            buf[0] = v;
+        }
+        break;
+    default:
+    case 4:
+        if (vs->pix_big_endian) {
+            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 (vs->depth == 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->pix_bpp);
+        }
+    } else if (vs->depth == 2) {
+        uint16_t *pixels = pixels1;
+        int n, i;
+        n = size >> 1;
+        for(i = 0; i < n; i++) {
+            vnc_convert_pixel(vs, buf, pixels[i]);
+            vnc_write(vs, buf, vs->pix_bpp);
+        }
+    } else if (vs->depth == 1) {
+        uint8_t *pixels = pixels1;
+        int n, i;
+        n = size;
+        for(i = 0; i < n; i++) {
+            vnc_convert_pixel(vs, buf, pixels[i]);
+            vnc_write(vs, buf, vs->pix_bpp);
+        }
+    } else {
+        fprintf(stderr, "vnc_write_pixels_generic: VncState color depth not supported\n");
+    }
+}
+
+static void send_framebuffer_update_raw(VncState *vs, int x, int y, int w, int h)
+{
+    int i;
+    uint8_t *row;
+
+    vnc_framebuffer_update(vs, x, y, w, h, 0);
+
+    row = vs->ds->data + y * vs->ds->linesize + x * vs->depth;
+    for (i = 0; i < h; i++) {
+	vs->write_pixels(vs, row, w * vs->depth);
+	row += vs->ds->linesize;
+    }
+}
+
+static void hextile_enc_cord(uint8_t *ptr, int x, int y, int w, int h)
+{
+    ptr[0] = ((x & 0x0F) << 4) | (y & 0x0F);
+    ptr[1] = (((w - 1) & 0x0F) << 4) | ((h - 1) & 0x0F);
+}
+
+#define BPP 8
+#include "vnchextile.h"
+#undef BPP
+
+#define BPP 16
+#include "vnchextile.h"
+#undef BPP
+
+#define BPP 32
+#include "vnchextile.h"
+#undef BPP
+
+#define GENERIC
+#define BPP 8
+#include "vnchextile.h"
+#undef BPP
+#undef GENERIC
+
+#define GENERIC
+#define BPP 16
+#include "vnchextile.h"
+#undef BPP
+#undef GENERIC
+
+#define GENERIC
+#define BPP 32
+#include "vnchextile.h"
+#undef BPP
+#undef GENERIC
+
+static void send_framebuffer_update_hextile(VncState *vs, int x, int y, int w, int h)
+{
+    int i, j;
+    int has_fg, has_bg;
+    uint8_t *last_fg, *last_bg;
+
+    vnc_framebuffer_update(vs, x, y, w, h, 5);
+
+    last_fg = (uint8_t *) malloc(vs->depth);
+    last_bg = (uint8_t *) malloc(vs->depth);
+    has_fg = has_bg = 0;
+    for (j = y; j < (y + h); j += 16) {
+	for (i = x; i < (x + w); i += 16) {
+            vs->send_hextile_tile(vs, i, j,
+                                  MIN(16, x + w - i), MIN(16, y + h - j),
+                                  last_bg, last_fg, &has_bg, &has_fg);
+	}
+    }
+    free(last_fg);
+    free(last_bg);
+
+}
+
+static void send_framebuffer_update(VncState *vs, int x, int y, int w, int h)
+{
+	if (vs->has_hextile)
+	    send_framebuffer_update_hextile(vs, x, y, w, h);
+	else
+	    send_framebuffer_update_raw(vs, x, y, w, h);
+}
+
+static void vnc_copy(DisplayState *ds, int src_x, int src_y, int dst_x, int dst_y, int w, int h)
+{
+    int src, dst;
+    uint8_t *src_row;
+    uint8_t *dst_row;
+    char *old_row;
+    int y = 0;
+    int pitch = ds->linesize;
+    VncState *vs = ds->opaque;
+
+    vnc_update_client(vs);
+
+    if (dst_y > src_y) {
+	y = h - 1;
+	pitch = -pitch;
+    }
+
+    src = (ds->linesize * (src_y + y) + vs->depth * src_x);
+    dst = (ds->linesize * (dst_y + y) + vs->depth * dst_x);
+
+    src_row = ds->data + src;
+    dst_row = ds->data + dst;
+    old_row = vs->old_data + dst;
+
+    for (y = 0; y < h; y++) {
+	memmove(old_row, src_row, w * vs->depth);
+	memmove(dst_row, src_row, w * vs->depth);
+	src_row += pitch;
+	dst_row += pitch;
+	old_row += pitch;
+    }
+
+    vnc_write_u8(vs, 0);  /* msg id */
+    vnc_write_u8(vs, 0);
+    vnc_write_u16(vs, 1); /* number of rects */
+    vnc_framebuffer_update(vs, dst_x, dst_y, w, h, 1);
+    vnc_write_u16(vs, src_x);
+    vnc_write_u16(vs, src_y);
+    vnc_flush(vs);
+}
+
+static int find_dirty_height(VncState *vs, int y, int last_x, int x)
+{
+    int h;
+
+    for (h = 1; h < (vs->height - y); h++) {
+	int tmp_x;
+	if (!vnc_get_bit(vs->dirty_row[y + h], last_x))
+	    break;
+	for (tmp_x = last_x; tmp_x < x; tmp_x++)
+	    vnc_clear_bit(vs->dirty_row[y + h], tmp_x);
+    }
+
+    return h;
+}
+
+static void vnc_update_client(void *opaque)
+{
+    VncState *vs = opaque;
+
+    if (vs->need_update && vs->csock != -1) {
+	int y;
+	uint8_t *row;
+	char *old_row;
+	uint32_t width_mask[VNC_DIRTY_WORDS];
+	int n_rectangles;
+	int saved_offset;
+	int has_dirty = 0;
+
+        vga_hw_update();
+
+        vnc_set_bits(width_mask, (vs->width / 16), VNC_DIRTY_WORDS);
+
+	/* Walk through the dirty map and eliminate tiles that
+	   really aren't dirty */
+	row = vs->ds->data;
+	old_row = vs->old_data;
+
+	for (y = 0; y < vs->height; y++) {
+	    if (vnc_and_bits(vs->dirty_row[y], width_mask, VNC_DIRTY_WORDS)) {
+		int x;
+		uint8_t *ptr;
+		char *old_ptr;
+
+		ptr = row;
+		old_ptr = (char*)old_row;
+
+		for (x = 0; x < vs->ds->width; x += 16) {
+		    if (memcmp(old_ptr, ptr, 16 * vs->depth) == 0) {
+			vnc_clear_bit(vs->dirty_row[y], (x / 16));
+		    } else {
+			has_dirty = 1;
+			memcpy(old_ptr, ptr, 16 * vs->depth);
+		    }
+
+		    ptr += 16 * vs->depth;
+		    old_ptr += 16 * vs->depth;
+		}
+	    }
+
+	    row += vs->ds->linesize;
+	    old_row += vs->ds->linesize;
+	}
+
+	if (!has_dirty) {
+	    qemu_mod_timer(vs->timer, qemu_get_clock(rt_clock) + VNC_REFRESH_INTERVAL);
+	    return;
+	}
+
+	/* Count rectangles */
+	n_rectangles = 0;
+	vnc_write_u8(vs, 0);  /* msg id */
+	vnc_write_u8(vs, 0);
+	saved_offset = vs->output.offset;
+	vnc_write_u16(vs, 0);
+
+	for (y = 0; y < vs->height; y++) {
+	    int x;
+	    int last_x = -1;
+	    for (x = 0; x < vs->width / 16; x++) {
+		if (vnc_get_bit(vs->dirty_row[y], x)) {
+		    if (last_x == -1) {
+			last_x = x;
+		    }
+		    vnc_clear_bit(vs->dirty_row[y], x);
+		} else {
+		    if (last_x != -1) {
+			int h = find_dirty_height(vs, y, last_x, x);
+			send_framebuffer_update(vs, last_x * 16, y, (x - last_x) * 16, h);
+			n_rectangles++;
+		    }
+		    last_x = -1;
+		}
+	    }
+	    if (last_x != -1) {
+		int h = find_dirty_height(vs, y, last_x, x);
+		send_framebuffer_update(vs, last_x * 16, y, (x - last_x) * 16, h);
+		n_rectangles++;
+	    }
+	}
+	vs->output.buffer[saved_offset] = (n_rectangles >> 8) & 0xFF;
+	vs->output.buffer[saved_offset + 1] = n_rectangles & 0xFF;
+	vnc_flush(vs);
+
+    }
+
+    if (vs->csock != -1) {
+        qemu_mod_timer(vs->timer, qemu_get_clock(rt_clock) + VNC_REFRESH_INTERVAL);
+    }
+
+}
+
+static int vnc_listen_poll(void *opaque)
+{
+    VncState *vs = opaque;
+    if (vs->csock == -1)
+	return 1;
+    return 0;
+}
+
+static void buffer_reserve(Buffer *buffer, size_t len)
+{
+    if ((buffer->capacity - buffer->offset) < len) {
+	buffer->capacity += (len + 1024);
+	buffer->buffer = qemu_realloc(buffer->buffer, buffer->capacity);
+	if (buffer->buffer == NULL) {
+	    fprintf(stderr, "vnc: out of memory\n");
+	    exit(1);
+	}
+    }
+}
+
+static int buffer_empty(Buffer *buffer)
+{
+    return buffer->offset == 0;
+}
+
+static uint8_t *buffer_end(Buffer *buffer)
+{
+    return buffer->buffer + buffer->offset;
+}
+
+static void buffer_reset(Buffer *buffer)
+{
+	buffer->offset = 0;
+}
+
+static void buffer_append(Buffer *buffer, const void *data, size_t len)
+{
+    memcpy(buffer->buffer + buffer->offset, data, len);
+    buffer->offset += len;
+}
+
+static 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 EWOULDBLOCK:
+#endif
+                    return 0;
+                default:
+                    break;
+            }
+        }
+
+	VNC_DEBUG("Closing down client sock %d %d\n", ret, ret < 0 ? last_errno : 0);
+	qemu_set_fd_handler2(vs->csock, NULL, NULL, NULL, NULL);
+	socket_close(vs->csock);
+	vs->csock = -1;
+	vs->ds->idle = 1;
+	buffer_reset(&vs->input);
+	buffer_reset(&vs->output);
+	vs->need_update = 0;
+#ifdef CONFIG_VNC_TLS
+	if (vs->tls_session) {
+	    gnutls_deinit(vs->tls_session);
+	    vs->tls_session = NULL;
+	}
+	vs->wiremode = VNC_WIREMODE_CLEAR;
+#endif /* CONFIG_VNC_TLS */
+	return 0;
+    }
+    return ret;
+}
+
+static void vnc_client_error(VncState *vs)
+{
+    vnc_client_io_error(vs, -1, EINVAL);
+}
+
+static void vnc_client_write(void *opaque)
+{
+    long ret;
+    VncState *vs = opaque;
+
+#ifdef CONFIG_VNC_TLS
+    if (vs->tls_session) {
+	ret = gnutls_write(vs->tls_session, vs->output.buffer, vs->output.offset);
+	if (ret < 0) {
+	    if (ret == GNUTLS_E_AGAIN)
+		errno = EAGAIN;
+	    else
+		errno = EIO;
+	    ret = -1;
+	}
+    } else
+#endif /* CONFIG_VNC_TLS */
+	ret = socket_send(vs->csock, vs->output.buffer, vs->output.offset);
+    ret = vnc_client_io_error(vs, ret, errno_str);
+    if (!ret)
+	return;
+
+    memmove(vs->output.buffer, vs->output.buffer + ret, (vs->output.offset - ret));
+    vs->output.offset -= ret;
+
+    if (vs->output.offset == 0) {
+	qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs);
+    }
+}
+
+static void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting)
+{
+    vs->read_handler = func;
+    vs->read_handler_expect = expecting;
+}
+
+static void vnc_client_read(void *opaque)
+{
+    VncState *vs = opaque;
+    long ret;
+
+    buffer_reserve(&vs->input, 4096);
+
+#ifdef CONFIG_VNC_TLS
+    if (vs->tls_session) {
+	ret = gnutls_read(vs->tls_session, buffer_end(&vs->input), 4096);
+	if (ret < 0) {
+	    if (ret == GNUTLS_E_AGAIN)
+		errno = EAGAIN;
+	    else
+		errno = EIO;
+	    ret = -1;
+	}
+    } else
+#endif /* CONFIG_VNC_TLS */
+	ret = socket_recv(vs->csock, buffer_end(&vs->input), 4096);
+    ret = vnc_client_io_error(vs, ret, errno_str);
+    if (!ret)
+	return;
+
+    vs->input.offset += ret;
+
+    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)
+	    return;
+
+	if (!ret) {
+	    memmove(vs->input.buffer, vs->input.buffer + len, (vs->input.offset - len));
+	    vs->input.offset -= len;
+	} else {
+	    vs->read_handler_expect = ret;
+	}
+    }
+}
+
+static void vnc_write(VncState *vs, const void *data, size_t len)
+{
+    buffer_reserve(&vs->output, len);
+
+    if (buffer_empty(&vs->output)) {
+	qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, vnc_client_write, vs);
+    }
+
+    buffer_append(&vs->output, data, len);
+}
+
+static void vnc_write_s32(VncState *vs, int32_t value)
+{
+    vnc_write_u32(vs, *(uint32_t *)&value);
+}
+
+static 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);
+}
+
+static 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);
+}
+
+static void vnc_write_u8(VncState *vs, uint8_t value)
+{
+    vnc_write(vs, (char *)&value, 1);
+}
+
+static void vnc_flush(VncState *vs)
+{
+    if (vs->output.offset)
+	vnc_client_write(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]);
+}
+
+static 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]);
+}
+
+#ifdef CONFIG_VNC_TLS
+static ssize_t vnc_tls_push(gnutls_transport_ptr_t transport,
+                            const void *data,
+                            size_t len) {
+    struct VncState *vs = (struct VncState *)transport;
+
+    return socket_send(vs->csock, data, len);
+}
+
+
+static ssize_t vnc_tls_pull(gnutls_transport_ptr_t transport,
+                            void *data,
+                            size_t len) {
+    struct VncState *vs = (struct VncState *)transport;
+
+    return socket_recv(vs->csock, data, len);
+}
+#endif /* CONFIG_VNC_TLS */
+
+static void client_cut_text(VncState *vs, size_t len, uint8_t *text)
+{
+}
+
+static void check_pointer_type_change(VncState *vs, int absolute)
+{
+    if (vs->has_pointer_type_change && vs->absolute != absolute) {
+	vnc_write_u8(vs, 0);
+	vnc_write_u8(vs, 0);
+	vnc_write_u16(vs, 1);
+	vnc_framebuffer_update(vs, absolute, 0,
+			       vs->ds->width, vs->ds->height, -257);
+	vnc_flush(vs);
+    }
+    vs->absolute = absolute;
+}
+
+static void pointer_event(VncState *vs, int button_mask, int x, int y)
+{
+    int buttons = 0;
+    int dz = 0;
+
+    if (button_mask & 0x01)
+	buttons |= MOUSE_EVENT_LBUTTON;
+    if (button_mask & 0x02)
+	buttons |= MOUSE_EVENT_MBUTTON;
+    if (button_mask & 0x04)
+	buttons |= MOUSE_EVENT_RBUTTON;
+    if (button_mask & 0x08)
+	dz = -1;
+    if (button_mask & 0x10)
+	dz = 1;
+
+    if (vs->absolute) {
+	kbd_mouse_event(x * 0x7FFF / (vs->ds->width - 1),
+			y * 0x7FFF / (vs->ds->height - 1),
+			dz, buttons);
+    } else if (vs->has_pointer_type_change) {
+	x -= 0x7FFF;
+	y -= 0x7FFF;
+
+	kbd_mouse_event(x, y, dz, buttons);
+    } else {
+	if (vs->last_x != -1)
+	    kbd_mouse_event(x - vs->last_x,
+			    y - vs->last_y,
+			    dz, buttons);
+	vs->last_x = x;
+	vs->last_y = y;
+    }
+
+    check_pointer_type_change(vs, kbd_mouse_is_absolute());
+}
+
+static void reset_keys(VncState *vs)
+{
+    int i;
+    for(i = 0; i < 256; i++) {
+        if (vs->modifiers_state[i]) {
+            if (i & 0x80)
+                kbd_put_keycode(0xe0);
+            kbd_put_keycode(i | 0x80);
+            vs->modifiers_state[i] = 0;
+        }
+    }
+}
+
+static void press_key(VncState *vs, int keysym)
+{
+    kbd_put_keycode(keysym2scancode(vs->kbd_layout, keysym) & 0x7f);
+    kbd_put_keycode(keysym2scancode(vs->kbd_layout, keysym) | 0x80);
+}
+
+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 (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;
+    }
+
+    if (keycode_is_keypad(vs->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->kbd_layout, sym & 0xFFFF)) {
+            if (!vs->modifiers_state[0x45]) {
+                vs->modifiers_state[0x45] = 1;
+                press_key(vs, 0xff7f);
+            }
+        } else {
+            if (vs->modifiers_state[0x45]) {
+                vs->modifiers_state[0x45] = 0;
+                press_key(vs, 0xff7f);
+            }
+        }
+    }
+
+    if (is_graphic_console()) {
+        if (keycode & 0x80)
+            kbd_put_keycode(0xe0);
+        if (down)
+            kbd_put_keycode(keycode & 0x7f);
+        else
+            kbd_put_keycode(keycode | 0x80);
+    } else {
+        /* 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;
+            default:
+                kbd_put_keysym(sym);
+                break;
+            }
+        }
+    }
+}
+
+static void key_event(VncState *vs, int down, uint32_t sym)
+{
+    int keycode;
+
+    if (sym >= 'A' && sym <= 'Z' && is_graphic_console())
+	sym = sym - 'A' + 'a';
+
+    keycode = keysym2scancode(vs->kbd_layout, sym & 0xFFFF);
+    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
+        do_key_event(vs, down, keycode, sym);
+}
+
+static void framebuffer_update_request(VncState *vs, int incremental,
+				       int x_position, int y_position,
+				       int w, int h)
+{
+    if (x_position > vs->ds->width)
+        x_position = vs->ds->width;
+    if (y_position > vs->ds->height)
+        y_position = vs->ds->height;
+    if (x_position + w >= vs->ds->width)
+        w = vs->ds->width  - x_position;
+    if (y_position + h >= vs->ds->height)
+        h = vs->ds->height - y_position;
+
+    int i;
+    vs->need_update = 1;
+    if (!incremental) {
+	char *old_row = vs->old_data + y_position * vs->ds->linesize;
+
+	for (i = 0; i < h; i++) {
+            vnc_set_bits(vs->dirty_row[y_position + i],
+                         (vs->ds->width / 16), VNC_DIRTY_WORDS);
+	    memset(old_row, 42, vs->ds->width * vs->depth);
+	    old_row += vs->ds->linesize;
+	}
+    }
+}
+
+static void send_ext_key_event_ack(VncState *vs)
+{
+    vnc_write_u8(vs, 0);
+    vnc_write_u8(vs, 0);
+    vnc_write_u16(vs, 1);
+    vnc_framebuffer_update(vs, 0, 0, vs->ds->width, vs->ds->height, -258);
+    vnc_flush(vs);
+}
+
+static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings)
+{
+    int i;
+
+    vs->has_hextile = 0;
+    vs->has_resize = 0;
+    vs->has_pointer_type_change = 0;
+    vs->has_WMVi = 0;
+    vs->absolute = -1;
+    vs->ds->dpy_copy = NULL;
+
+    for (i = n_encodings - 1; i >= 0; i--) {
+	switch (encodings[i]) {
+	case 0: /* Raw */
+	    vs->has_hextile = 0;
+	    break;
+	case 1: /* CopyRect */
+	    vs->ds->dpy_copy = vnc_copy;
+	    break;
+	case 5: /* Hextile */
+	    vs->has_hextile = 1;
+	    break;
+	case -223: /* DesktopResize */
+	    vs->has_resize = 1;
+	    break;
+	case -257:
+	    vs->has_pointer_type_change = 1;
+	    break;
+        case -258:
+            send_ext_key_event_ack(vs);
+            break;
+        case 0x574D5669:
+            vs->has_WMVi = 1;
+            break;
+	default:
+	    break;
+	}
+    }
+
+    check_pointer_type_change(vs, kbd_mouse_is_absolute());
+}
+
+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)
+{
+    int host_big_endian_flag;
+
+#ifdef WORDS_BIGENDIAN
+    host_big_endian_flag = 1;
+#else
+    host_big_endian_flag = 0;
+#endif
+    if (!true_color_flag) {
+    fail:
+	vnc_client_error(vs);
+        return;
+    }
+    if (bits_per_pixel == 32 &&
+        bits_per_pixel == vs->depth * 8 &&
+        host_big_endian_flag == big_endian_flag &&
+        red_max == 0xff && green_max == 0xff && blue_max == 0xff &&
+        red_shift == 16 && green_shift == 8 && blue_shift == 0) {
+        vs->depth = 4;
+        vs->write_pixels = vnc_write_pixels_copy;
+        vs->send_hextile_tile = send_hextile_tile_32;
+    } else
+    if (bits_per_pixel == 16 &&
+        bits_per_pixel == vs->depth * 8 && 
+        host_big_endian_flag == big_endian_flag &&
+        red_max == 31 && green_max == 63 && blue_max == 31 &&
+        red_shift == 11 && green_shift == 5 && blue_shift == 0) {
+        vs->depth = 2;
+        vs->write_pixels = vnc_write_pixels_copy;
+        vs->send_hextile_tile = send_hextile_tile_16;
+    } else
+    if (bits_per_pixel == 8 &&
+        bits_per_pixel == vs->depth * 8 &&
+        red_max == 7 && green_max == 7 && blue_max == 3 &&
+        red_shift == 5 && green_shift == 2 && blue_shift == 0) {
+        vs->depth = 1;
+        vs->write_pixels = vnc_write_pixels_copy;
+        vs->send_hextile_tile = send_hextile_tile_8;
+    } else
+    {
+        /* generic and slower case */
+        if (bits_per_pixel != 8 &&
+            bits_per_pixel != 16 &&
+            bits_per_pixel != 32)
+            goto fail;
+        if (vs->depth == 4) {
+            vs->send_hextile_tile = send_hextile_tile_generic_32;
+        } else if (vs->depth == 2) {
+           vs->send_hextile_tile = send_hextile_tile_generic_16;
+        } else {
+            vs->send_hextile_tile = send_hextile_tile_generic_8;
+        }
+
+        vs->pix_big_endian = big_endian_flag;
+        vs->write_pixels = vnc_write_pixels_generic;
+    }
+
+    vs->client_red_shift = red_shift;
+    vs->client_red_max = red_max;
+    vs->client_green_shift = green_shift;
+    vs->client_green_max = green_max;
+    vs->client_blue_shift = blue_shift;
+    vs->client_blue_max = blue_max;
+    vs->pix_bpp = bits_per_pixel / 8;
+
+    vga_hw_invalidate();
+    vga_hw_update();
+}
+
+static void pixel_format_message (VncState *vs) {
+    char pad[3] = { 0, 0, 0 };
+
+    vnc_write_u8(vs, vs->depth * 8); /* bits-per-pixel */
+    if (vs->depth == 4) vnc_write_u8(vs, 24); /* depth */
+    else vnc_write_u8(vs, vs->depth * 8); /* depth */
+
+#ifdef 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 */
+    if (vs->depth == 4) {
+        vnc_write_u16(vs, 0xFF);     /* red-max */
+        vnc_write_u16(vs, 0xFF);     /* green-max */
+        vnc_write_u16(vs, 0xFF);     /* blue-max */
+        vnc_write_u8(vs, 16);        /* red-shift */
+        vnc_write_u8(vs, 8);         /* green-shift */
+        vnc_write_u8(vs, 0);         /* blue-shift */
+        vs->send_hextile_tile = send_hextile_tile_32;
+    } else if (vs->depth == 2) {
+        vnc_write_u16(vs, 31);       /* red-max */
+        vnc_write_u16(vs, 63);       /* green-max */
+        vnc_write_u16(vs, 31);       /* blue-max */
+        vnc_write_u8(vs, 11);        /* red-shift */
+        vnc_write_u8(vs, 5);         /* green-shift */
+        vnc_write_u8(vs, 0);         /* blue-shift */
+        vs->send_hextile_tile = send_hextile_tile_16;
+    } else if (vs->depth == 1) {
+        /* XXX: change QEMU pixel 8 bit pixel format to match the VNC one ? */
+        vnc_write_u16(vs, 7);        /* red-max */
+        vnc_write_u16(vs, 7);        /* green-max */
+        vnc_write_u16(vs, 3);        /* blue-max */
+        vnc_write_u8(vs, 5);         /* red-shift */
+        vnc_write_u8(vs, 2);         /* green-shift */
+        vnc_write_u8(vs, 0);         /* blue-shift */
+        vs->send_hextile_tile = send_hextile_tile_8;
+    }
+    vs->client_red_max = vs->server_red_max;
+    vs->client_green_max = vs->server_green_max;
+    vs->client_blue_max = vs->server_blue_max;
+    vs->client_red_shift = vs->server_red_shift;
+    vs->client_green_shift = vs->server_green_shift;
+    vs->client_blue_shift = vs->server_blue_shift;
+    vs->pix_bpp = vs->depth * 8;
+    vs->write_pixels = vnc_write_pixels_copy;
+
+    vnc_write(vs, pad, 3);           /* padding */
+}
+
+static void vnc_colordepth(DisplayState *ds, int depth)
+{
+    int host_big_endian_flag;
+    struct VncState *vs = ds->opaque;
+
+    switch (depth) {
+        case 24:
+            if (ds->depth == 32) return;
+            depth = 32;
+            break;
+        case 15:
+        case 8:
+        case 0:
+            return;
+        default:
+            break;
+    }
+
+#ifdef WORDS_BIGENDIAN
+    host_big_endian_flag = 1;
+#else
+    host_big_endian_flag = 0;
+#endif   
+    
+    switch (depth) {
+        case 8:
+            vs->depth = depth / 8;
+            vs->server_red_max = 7;
+            vs->server_green_max = 7;
+            vs->server_blue_max = 3;
+            vs->server_red_shift = 5;
+            vs->server_green_shift = 2;
+            vs->server_blue_shift = 0;
+            break;
+        case 16:
+            vs->depth = depth / 8;
+            vs->server_red_max = 31;
+            vs->server_green_max = 63;
+            vs->server_blue_max = 31;
+            vs->server_red_shift = 11;
+            vs->server_green_shift = 5;
+            vs->server_blue_shift = 0;
+            break;
+        case 32:
+            vs->depth = 4;
+            vs->server_red_max = 255;
+            vs->server_green_max = 255;
+            vs->server_blue_max = 255;
+            vs->server_red_shift = 16;
+            vs->server_green_shift = 8;
+            vs->server_blue_shift = 0;
+            break;
+        default:
+            return;
+    }
+
+    if (vs->csock != -1 && vs->has_WMVi) {
+        /* Sending a WMVi message to notify the client*/
+        vnc_write_u8(vs, 0);  /* msg id */
+        vnc_write_u8(vs, 0);
+        vnc_write_u16(vs, 1); /* number of rects */
+        vnc_framebuffer_update(vs, 0, 0, ds->width, ds->height, 0x574D5669);
+        pixel_format_message(vs);
+        vnc_flush(vs);
+    } else {
+        if (vs->pix_bpp == 4 && vs->depth == 4 &&
+                host_big_endian_flag == vs->pix_big_endian &&
+                vs->client_red_max == 0xff && vs->client_green_max == 0xff && vs->client_blue_max == 0xff &&
+                vs->client_red_shift == 16 && vs->client_green_shift == 8 && vs->client_blue_shift == 0) {
+            vs->write_pixels = vnc_write_pixels_copy;
+            vs->send_hextile_tile = send_hextile_tile_32;
+        } else if (vs->pix_bpp == 2 && vs->depth == 2 &&
+                host_big_endian_flag == vs->pix_big_endian &&
+                vs->client_red_max == 31 && vs->client_green_max == 63 && vs->client_blue_max == 31 &&
+                vs->client_red_shift == 11 && vs->client_green_shift == 5 && vs->client_blue_shift == 0) {
+            vs->write_pixels = vnc_write_pixels_copy;
+            vs->send_hextile_tile = send_hextile_tile_16;
+        } else if (vs->pix_bpp == 1 && vs->depth == 1 &&
+                host_big_endian_flag == vs->pix_big_endian &&
+                vs->client_red_max == 7 && vs->client_green_max == 7 && vs->client_blue_max == 3 &&
+                vs->client_red_shift == 5 && vs->client_green_shift == 2 && vs->client_blue_shift == 0) {
+            vs->write_pixels = vnc_write_pixels_copy;
+            vs->send_hextile_tile = send_hextile_tile_8;
+        } else {
+            if (vs->depth == 4) {
+                vs->send_hextile_tile = send_hextile_tile_generic_32;
+            } else if (vs->depth == 2) {
+                vs->send_hextile_tile = send_hextile_tile_generic_16;
+            } else {
+                vs->send_hextile_tile = send_hextile_tile_generic_8;
+            }
+            vs->write_pixels = vnc_write_pixels_generic;
+        }
+    }
+}
+
+static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len)
+{
+    int i;
+    uint16_t limit;
+
+    switch (data[0]) {
+    case 0:
+	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 2:
+	if (len == 1)
+	    return 4;
+
+	if (len == 4)
+	    return 4 + (read_u16(data, 2) * 4);
+
+	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 3:
+	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 4:
+	if (len == 1)
+	    return 8;
+
+	key_event(vs, read_u8(data, 1), read_u32(data, 4));
+	break;
+    case 5:
+	if (len == 1)
+	    return 6;
+
+	pointer_event(vs, read_u8(data, 1), read_u16(data, 2), read_u16(data, 4));
+	break;
+    case 6:
+	if (len == 1)
+	    return 8;
+
+	if (len == 8) {
+            uint32_t dlen = read_u32(data, 4);
+            if (dlen > 0)
+                return 8 + dlen;
+        }
+
+	client_cut_text(vs, read_u32(data, 4), data + 8);
+	break;
+    case 255:
+        if (len == 1)
+            return 2;
+
+        switch (read_u8(data, 1)) {
+        case 0:
+            if (len == 2)
+                return 12;
+
+            ext_key_event(vs, read_u16(data, 2),
+                          read_u32(data, 4), read_u32(data, 8));
+            break;
+        default:
+            printf("Msg: %d\n", read_u16(data, 0));
+            vnc_client_error(vs);
+            break;
+        }
+        break;
+    default:
+	printf("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];
+    int size;
+
+    vs->width = vs->ds->width;
+    vs->height = vs->ds->height;
+    vnc_write_u16(vs, vs->ds->width);
+    vnc_write_u16(vs, vs->ds->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_read_when(vs, protocol_client_msg, 1);
+
+    return 0;
+}
+
+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];
+
+    if (!vs->password || !vs->password[0]) {
+	VNC_DEBUG("No password configured on server");
+	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;
+    }
+
+    memcpy(response, vs->challenge, VNC_AUTH_CHALLENGE_SIZE);
+
+    /* Calculate the expected challenge response */
+    pwlen = strlen(vs->password);
+    for (i=0; i<sizeof(key); i++)
+        key[i] = i<pwlen ? vs->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 reponse did not match\n");
+	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);
+    } else {
+	VNC_DEBUG("Accepting VNC challenge response\n");
+	vnc_write_u32(vs, 0); /* Accept auth */
+	vnc_flush(vs);
+
+	vnc_read_when(vs, protocol_client_init, 1);
+    }
+    return 0;
+}
+
+static int 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));
+    return 0;
+}
+
+
+#ifdef CONFIG_VNC_TLS
+#define DH_BITS 1024
+static gnutls_dh_params_t dh_params;
+
+static int vnc_tls_initialize(void)
+{
+    static int tlsinitialized = 0;
+
+    if (tlsinitialized)
+	return 1;
+
+    if (gnutls_global_init () < 0)
+	return 0;
+
+    /* XXX ought to re-generate diffie-hellmen params periodically */
+    if (gnutls_dh_params_init (&dh_params) < 0)
+	return 0;
+    if (gnutls_dh_params_generate2 (dh_params, DH_BITS) < 0)
+	return 0;
+
+#if _VNC_DEBUG == 2
+    gnutls_global_set_log_level(10);
+    gnutls_global_set_log_function(vnc_debug_gnutls_log);
+#endif
+
+    tlsinitialized = 1;
+
+    return 1;
+}
+
+static gnutls_anon_server_credentials vnc_tls_initialize_anon_cred(void)
+{
+    gnutls_anon_server_credentials anon_cred;
+    int ret;
+
+    if ((ret = gnutls_anon_allocate_server_credentials(&anon_cred)) < 0) {
+	VNC_DEBUG("Cannot allocate credentials %s\n", gnutls_strerror(ret));
+	return NULL;
+    }
+
+    gnutls_anon_set_server_dh_params(anon_cred, dh_params);
+
+    return anon_cred;
+}
+
+
+static gnutls_certificate_credentials_t vnc_tls_initialize_x509_cred(VncState *vs)
+{
+    gnutls_certificate_credentials_t x509_cred;
+    int ret;
+
+    if (!vs->x509cacert) {
+	VNC_DEBUG("No CA x509 certificate specified\n");
+	return NULL;
+    }
+    if (!vs->x509cert) {
+	VNC_DEBUG("No server x509 certificate specified\n");
+	return NULL;
+    }
+    if (!vs->x509key) {
+	VNC_DEBUG("No server private key specified\n");
+	return NULL;
+    }
+
+    if ((ret = gnutls_certificate_allocate_credentials(&x509_cred)) < 0) {
+	VNC_DEBUG("Cannot allocate credentials %s\n", gnutls_strerror(ret));
+	return NULL;
+    }
+    if ((ret = gnutls_certificate_set_x509_trust_file(x509_cred,
+						      vs->x509cacert,
+						      GNUTLS_X509_FMT_PEM)) < 0) {
+	VNC_DEBUG("Cannot load CA certificate %s\n", gnutls_strerror(ret));
+	gnutls_certificate_free_credentials(x509_cred);
+	return NULL;
+    }
+
+    if ((ret = gnutls_certificate_set_x509_key_file (x509_cred,
+						     vs->x509cert,
+						     vs->x509key,
+						     GNUTLS_X509_FMT_PEM)) < 0) {
+	VNC_DEBUG("Cannot load certificate & key %s\n", gnutls_strerror(ret));
+	gnutls_certificate_free_credentials(x509_cred);
+	return NULL;
+    }
+
+    if (vs->x509cacrl) {
+	if ((ret = gnutls_certificate_set_x509_crl_file(x509_cred,
+							vs->x509cacrl,
+							GNUTLS_X509_FMT_PEM)) < 0) {
+	    VNC_DEBUG("Cannot load CRL %s\n", gnutls_strerror(ret));
+	    gnutls_certificate_free_credentials(x509_cred);
+	    return NULL;
+	}
+    }
+
+    gnutls_certificate_set_dh_params (x509_cred, dh_params);
+
+    return x509_cred;
+}
+
+static int vnc_validate_certificate(struct VncState *vs)
+{
+    int ret;
+    unsigned int status;
+    const gnutls_datum_t *certs;
+    unsigned int nCerts, i;
+    time_t now;
+
+    VNC_DEBUG("Validating client certificate\n");
+    if ((ret = gnutls_certificate_verify_peers2 (vs->tls_session, &status)) < 0) {
+	VNC_DEBUG("Verify failed %s\n", gnutls_strerror(ret));
+	return -1;
+    }
+
+    if ((now = time(NULL)) == ((time_t)-1)) {
+	return -1;
+    }
+
+    if (status != 0) {
+	if (status & GNUTLS_CERT_INVALID)
+	    VNC_DEBUG("The certificate is not trusted.\n");
+
+	if (status & GNUTLS_CERT_SIGNER_NOT_FOUND)
+	    VNC_DEBUG("The certificate hasn't got a known issuer.\n");
+
+	if (status & GNUTLS_CERT_REVOKED)
+	    VNC_DEBUG("The certificate has been revoked.\n");
+
+	if (status & GNUTLS_CERT_INSECURE_ALGORITHM)
+	    VNC_DEBUG("The certificate uses an insecure algorithm\n");
+
+	return -1;
+    } else {
+	VNC_DEBUG("Certificate is valid!\n");
+    }
+
+    /* Only support x509 for now */
+    if (gnutls_certificate_type_get(vs->tls_session) != GNUTLS_CRT_X509)
+	return -1;
+
+    if (!(certs = gnutls_certificate_get_peers(vs->tls_session, &nCerts)))
+	return -1;
+
+    for (i = 0 ; i < nCerts ; i++) {
+	gnutls_x509_crt_t cert;
+	VNC_DEBUG ("Checking certificate chain %d\n", i);
+	if (gnutls_x509_crt_init (&cert) < 0)
+	    return -1;
+
+	if (gnutls_x509_crt_import(cert, &certs[i], GNUTLS_X509_FMT_DER) < 0) {
+	    gnutls_x509_crt_deinit (cert);
+	    return -1;
+	}
+
+	if (gnutls_x509_crt_get_expiration_time (cert) < now) {
+	    VNC_DEBUG("The certificate has expired\n");
+	    gnutls_x509_crt_deinit (cert);
+	    return -1;
+	}
+
+	if (gnutls_x509_crt_get_activation_time (cert) > now) {
+	    VNC_DEBUG("The certificate is not yet activated\n");
+	    gnutls_x509_crt_deinit (cert);
+	    return -1;
+	}
+
+	if (gnutls_x509_crt_get_activation_time (cert) > now) {
+	    VNC_DEBUG("The certificate is not yet activated\n");
+	    gnutls_x509_crt_deinit (cert);
+	    return -1;
+	}
+
+	gnutls_x509_crt_deinit (cert);
+    }
+
+    return 0;
+}
+
+
+static int start_auth_vencrypt_subauth(VncState *vs)
+{
+    switch (vs->subauth) {
+    case VNC_AUTH_VENCRYPT_TLSNONE:
+    case VNC_AUTH_VENCRYPT_X509NONE:
+       VNC_DEBUG("Accept TLS auth none\n");
+       vnc_write_u32(vs, 0); /* Accept auth completion */
+       vnc_read_when(vs, protocol_client_init, 1);
+       break;
+
+    case VNC_AUTH_VENCRYPT_TLSVNC:
+    case VNC_AUTH_VENCRYPT_X509VNC:
+       VNC_DEBUG("Start TLS auth VNC\n");
+       return start_auth_vnc(vs);
+
+    default: /* Should not be possible, but just in case */
+       VNC_DEBUG("Reject auth %d\n", vs->auth);
+       vnc_write_u8(vs, 1);
+       if (vs->minor >= 8) {
+           static const char err[] = "Unsupported authentication type";
+           vnc_write_u32(vs, sizeof(err));
+           vnc_write(vs, err, sizeof(err));
+       }
+       vnc_client_error(vs);
+    }
+
+    return 0;
+}
+
+static void vnc_handshake_io(void *opaque);
+
+static int vnc_continue_handshake(struct VncState *vs) {
+    int ret;
+
+    if ((ret = gnutls_handshake(vs->tls_session)) < 0) {
+       if (!gnutls_error_is_fatal(ret)) {
+           VNC_DEBUG("Handshake interrupted (blocking)\n");
+           if (!gnutls_record_get_direction(vs->tls_session))
+               qemu_set_fd_handler(vs->csock, vnc_handshake_io, NULL, vs);
+           else
+               qemu_set_fd_handler(vs->csock, NULL, vnc_handshake_io, vs);
+           return 0;
+       }
+       VNC_DEBUG("Handshake failed %s\n", gnutls_strerror(ret));
+       vnc_client_error(vs);
+       return -1;
+    }
+
+    if (vs->x509verify) {
+	if (vnc_validate_certificate(vs) < 0) {
+	    VNC_DEBUG("Client verification failed\n");
+	    vnc_client_error(vs);
+	    return -1;
+	} else {
+	    VNC_DEBUG("Client verification passed\n");
+	}
+    }
+
+    VNC_DEBUG("Handshake done, switching to TLS data mode\n");
+    vs->wiremode = VNC_WIREMODE_TLS;
+    qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, vnc_client_write, vs);
+
+    return start_auth_vencrypt_subauth(vs);
+}
+
+static void vnc_handshake_io(void *opaque) {
+    struct VncState *vs = (struct VncState *)opaque;
+
+    VNC_DEBUG("Handshake IO continue\n");
+    vnc_continue_handshake(vs);
+}
+
+#define NEED_X509_AUTH(vs)			      \
+    ((vs)->subauth == VNC_AUTH_VENCRYPT_X509NONE ||   \
+     (vs)->subauth == VNC_AUTH_VENCRYPT_X509VNC ||    \
+     (vs)->subauth == VNC_AUTH_VENCRYPT_X509PLAIN)
+
+
+static int vnc_start_tls(struct VncState *vs) {
+    static const int cert_type_priority[] = { GNUTLS_CRT_X509, 0 };
+    static const int protocol_priority[]= { GNUTLS_TLS1_1, GNUTLS_TLS1_0, GNUTLS_SSL3, 0 };
+    static const int kx_anon[] = {GNUTLS_KX_ANON_DH, 0};
+    static const int kx_x509[] = {GNUTLS_KX_DHE_DSS, GNUTLS_KX_RSA, GNUTLS_KX_DHE_RSA, GNUTLS_KX_SRP, 0};
+
+    VNC_DEBUG("Do TLS setup\n");
+    if (vnc_tls_initialize() < 0) {
+	VNC_DEBUG("Failed to init TLS\n");
+	vnc_client_error(vs);
+	return -1;
+    }
+    if (vs->tls_session == NULL) {
+	if (gnutls_init(&vs->tls_session, GNUTLS_SERVER) < 0) {
+	    vnc_client_error(vs);
+	    return -1;
+	}
+
+	if (gnutls_set_default_priority(vs->tls_session) < 0) {
+	    gnutls_deinit(vs->tls_session);
+	    vs->tls_session = NULL;
+	    vnc_client_error(vs);
+	    return -1;
+	}
+
+	if (gnutls_kx_set_priority(vs->tls_session, NEED_X509_AUTH(vs) ? kx_x509 : kx_anon) < 0) {
+	    gnutls_deinit(vs->tls_session);
+	    vs->tls_session = NULL;
+	    vnc_client_error(vs);
+	    return -1;
+	}
+
+	if (gnutls_certificate_type_set_priority(vs->tls_session, cert_type_priority) < 0) {
+	    gnutls_deinit(vs->tls_session);
+	    vs->tls_session = NULL;
+	    vnc_client_error(vs);
+	    return -1;
+	}
+
+	if (gnutls_protocol_set_priority(vs->tls_session, protocol_priority) < 0) {
+	    gnutls_deinit(vs->tls_session);
+	    vs->tls_session = NULL;
+	    vnc_client_error(vs);
+	    return -1;
+	}
+
+	if (NEED_X509_AUTH(vs)) {
+	    gnutls_certificate_server_credentials x509_cred = vnc_tls_initialize_x509_cred(vs);
+	    if (!x509_cred) {
+		gnutls_deinit(vs->tls_session);
+		vs->tls_session = NULL;
+		vnc_client_error(vs);
+		return -1;
+	    }
+	    if (gnutls_credentials_set(vs->tls_session, GNUTLS_CRD_CERTIFICATE, x509_cred) < 0) {
+		gnutls_deinit(vs->tls_session);
+		vs->tls_session = NULL;
+		gnutls_certificate_free_credentials(x509_cred);
+		vnc_client_error(vs);
+		return -1;
+	    }
+	    if (vs->x509verify) {
+		VNC_DEBUG("Requesting a client certificate\n");
+		gnutls_certificate_server_set_request (vs->tls_session, GNUTLS_CERT_REQUEST);
+	    }
+
+	} else {
+	    gnutls_anon_server_credentials anon_cred = vnc_tls_initialize_anon_cred();
+	    if (!anon_cred) {
+		gnutls_deinit(vs->tls_session);
+		vs->tls_session = NULL;
+		vnc_client_error(vs);
+		return -1;
+	    }
+	    if (gnutls_credentials_set(vs->tls_session, GNUTLS_CRD_ANON, anon_cred) < 0) {
+		gnutls_deinit(vs->tls_session);
+		vs->tls_session = NULL;
+		gnutls_anon_free_server_credentials(anon_cred);
+		vnc_client_error(vs);
+		return -1;
+	    }
+	}
+
+	gnutls_transport_set_ptr(vs->tls_session, (gnutls_transport_ptr_t)vs);
+	gnutls_transport_set_push_function(vs->tls_session, vnc_tls_push);
+	gnutls_transport_set_pull_function(vs->tls_session, vnc_tls_pull);
+    }
+
+    VNC_DEBUG("Start TLS handshake process\n");
+    return vnc_continue_handshake(vs);
+}
+
+static int protocol_client_vencrypt_auth(VncState *vs, uint8_t *data, size_t len)
+{
+    int auth = read_u32(data, 0);
+
+    if (auth != vs->subauth) {
+	VNC_DEBUG("Rejecting auth %d\n", auth);
+	vnc_write_u8(vs, 0); /* Reject auth */
+	vnc_flush(vs);
+	vnc_client_error(vs);
+    } else {
+	VNC_DEBUG("Accepting auth %d, starting handshake\n", auth);
+	vnc_write_u8(vs, 1); /* Accept auth */
+	vnc_flush(vs);
+
+	if (vnc_start_tls(vs) < 0) {
+	    VNC_DEBUG("Failed to complete TLS\n");
+	    return 0;
+	}
+
+	if (vs->wiremode == VNC_WIREMODE_TLS) {
+	    VNC_DEBUG("Starting VeNCrypt subauth\n");
+	    return start_auth_vencrypt_subauth(vs);
+	} else {
+	    VNC_DEBUG("TLS handshake blocked\n");
+	    return 0;
+	}
+    }
+    return 0;
+}
+
+static int protocol_client_vencrypt_init(VncState *vs, uint8_t *data, size_t len)
+{
+    if (data[0] != 0 ||
+	data[1] != 2) {
+	VNC_DEBUG("Unsupported VeNCrypt protocol %d.%d\n", (int)data[0], (int)data[1]);
+	vnc_write_u8(vs, 1); /* Reject version */
+	vnc_flush(vs);
+	vnc_client_error(vs);
+    } else {
+	VNC_DEBUG("Sending allowed auth %d\n", vs->subauth);
+	vnc_write_u8(vs, 0); /* Accept version */
+	vnc_write_u8(vs, 1); /* Number of sub-auths */
+	vnc_write_u32(vs, vs->subauth); /* The supported auth */
+	vnc_flush(vs);
+	vnc_read_when(vs, protocol_client_vencrypt_auth, 4);
+    }
+    return 0;
+}
+
+static int start_auth_vencrypt(VncState *vs)
+{
+    /* Send VeNCrypt version 0.2 */
+    vnc_write_u8(vs, 0);
+    vnc_write_u8(vs, 2);
+
+    vnc_read_when(vs, protocol_client_vencrypt_init, 2);
+    return 0;
+}
+#endif /* CONFIG_VNC_TLS */
+
+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\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);
+           }
+           vnc_read_when(vs, protocol_client_init, 1);
+           break;
+
+       case VNC_AUTH_VNC:
+           VNC_DEBUG("Start VNC auth\n");
+           return start_auth_vnc(vs);
+
+#ifdef CONFIG_VNC_TLS
+       case VNC_AUTH_VENCRYPT:
+           VNC_DEBUG("Accept VeNCrypt auth\n");;
+           return start_auth_vencrypt(vs);
+#endif /* CONFIG_VNC_TLS */
+
+       default: /* Should not be possible, but just in case */
+           VNC_DEBUG("Reject auth %d\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);
+            vnc_read_when(vs, protocol_client_init, 1);
+       } 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 void vnc_connect(VncState *vs)
+{
+    VNC_DEBUG("New client on socket %d\n", vs->csock);
+    vs->ds->idle = 0;
+    socket_set_nonblock(vs->csock);
+    qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs);
+    vnc_write(vs, "RFB 003.008\n", 12);
+    vnc_flush(vs);
+    vnc_read_when(vs, protocol_version, 12);
+    memset(vs->old_data, 0, vs->ds->linesize * vs->ds->height);
+    memset(vs->dirty_row, 0xFF, sizeof(vs->dirty_row));
+    vs->has_resize = 0;
+    vs->has_hextile = 0;
+    vs->ds->dpy_copy = NULL;
+    vnc_update_client(vs);
+}
+
+static void vnc_listen_read(void *opaque)
+{
+    VncState *vs = opaque;
+
+    /* Catch-up */
+    vga_hw_update();
+
+    vs->csock = socket_accept(vs->lsock, NULL);
+    if (vs->csock != -1) {
+        vnc_connect(vs);
+    }
+}
+
+extern int parse_host_port(SockAddress* saddr, const char *str);
+
+void vnc_display_init(DisplayState *ds)
+{
+    VncState *vs;
+
+    vs = qemu_mallocz(sizeof(VncState));
+    if (!vs)
+	exit(1);
+
+    ds->opaque = vs;
+    ds->idle = 1;
+    vnc_state = vs;
+    vs->display = NULL;
+    vs->password = NULL;
+
+    vs->lsock = -1;
+    vs->csock = -1;
+    vs->last_x = -1;
+    vs->last_y = -1;
+
+    vs->ds = ds;
+
+    if (keyboard_layout)
+        vs->kbd_layout = init_keyboard_layout(keyboard_layout);
+    else
+        vs->kbd_layout = init_keyboard_layout("en-us");
+
+    if (!vs->kbd_layout)
+	exit(1);
+
+    vs->timer = qemu_new_timer(rt_clock, vnc_update_client, vs);
+
+    vs->ds->data = NULL;
+    vs->ds->dpy_update = vnc_dpy_update;
+    vs->ds->dpy_resize = vnc_dpy_resize;
+    vs->ds->dpy_refresh = NULL;
+
+    vnc_colordepth(vs->ds, 32);
+    vnc_dpy_resize(vs->ds, 640, 400);
+}
+
+#ifdef CONFIG_VNC_TLS
+static int vnc_set_x509_credential(VncState *vs,
+				   const char *certdir,
+				   const char *filename,
+				   char **cred,
+				   int ignoreMissing)
+{
+    struct stat sb;
+
+    if (*cred) {
+	qemu_free(*cred);
+	*cred = NULL;
+    }
+
+    if (!(*cred = qemu_malloc(strlen(certdir) + strlen(filename) + 2)))
+	return -1;
+
+    strcpy(*cred, certdir);
+    strcat(*cred, "/");
+    strcat(*cred, filename);
+
+    VNC_DEBUG("Check %s\n", *cred);
+    if (stat(*cred, &sb) < 0) {
+	qemu_free(*cred);
+	*cred = NULL;
+	if (ignoreMissing && errno == ENOENT)
+	    return 0;
+	return -1;
+    }
+
+    return 0;
+}
+
+static int vnc_set_x509_credential_dir(VncState *vs,
+				       const char *certdir)
+{
+    if (vnc_set_x509_credential(vs, certdir, X509_CA_CERT_FILE, &vs->x509cacert, 0) < 0)
+	goto cleanup;
+    if (vnc_set_x509_credential(vs, certdir, X509_CA_CRL_FILE, &vs->x509cacrl, 1) < 0)
+	goto cleanup;
+    if (vnc_set_x509_credential(vs, certdir, X509_SERVER_CERT_FILE, &vs->x509cert, 0) < 0)
+	goto cleanup;
+    if (vnc_set_x509_credential(vs, certdir, X509_SERVER_KEY_FILE, &vs->x509key, 0) < 0)
+	goto cleanup;
+
+    return 0;
+
+ cleanup:
+    qemu_free(vs->x509cacert);
+    qemu_free(vs->x509cacrl);
+    qemu_free(vs->x509cert);
+    qemu_free(vs->x509key);
+    vs->x509cacert = vs->x509cacrl = vs->x509cert = vs->x509key = NULL;
+    return -1;
+}
+#endif /* CONFIG_VNC_TLS */
+
+void vnc_display_close(DisplayState *ds)
+{
+    VncState *vs = ds ? (VncState *)ds->opaque : vnc_state;
+
+    if (vs->display) {
+	qemu_free(vs->display);
+	vs->display = NULL;
+    }
+    if (vs->lsock != -1) {
+	qemu_set_fd_handler2(vs->lsock, NULL, NULL, NULL, NULL);
+	close(vs->lsock);
+	vs->lsock = -1;
+    }
+    if (vs->csock != -1) {
+	qemu_set_fd_handler2(vs->csock, NULL, NULL, NULL, NULL);
+	socket_close(vs->csock);
+	vs->csock = -1;
+	buffer_reset(&vs->input);
+	buffer_reset(&vs->output);
+	vs->need_update = 0;
+#ifdef CONFIG_VNC_TLS
+	if (vs->tls_session) {
+	    gnutls_deinit(vs->tls_session);
+	    vs->tls_session = NULL;
+	}
+	vs->wiremode = VNC_WIREMODE_CLEAR;
+#endif /* CONFIG_VNC_TLS */
+    }
+    vs->auth = VNC_AUTH_INVALID;
+#ifdef CONFIG_VNC_TLS
+    vs->subauth = VNC_AUTH_INVALID;
+    vs->x509verify = 0;
+#endif
+}
+
+int vnc_display_password(DisplayState *ds, const char *password)
+{
+    VncState *vs = ds ? (VncState *)ds->opaque : vnc_state;
+
+    if (vs->password) {
+	qemu_free(vs->password);
+	vs->password = NULL;
+    }
+    if (password && password[0]) {
+	if (!(vs->password = qemu_strdup(password)))
+	    return -1;
+    }
+
+    return 0;
+}
+
+int vnc_display_open(DisplayState *ds, const char *display)
+{
+    SockAddress  addr;
+#ifndef _WIN32
+    const char *p;
+#endif
+    int ret;
+    VncState *vs = ds ? (VncState *)ds->opaque : vnc_state;
+    const char *options;
+    int password = 0;
+    int reverse = 0;
+#ifdef CONFIG_VNC_TLS
+    int tls = 0, x509 = 0;
+#endif
+
+    sock_address_init_inet( &addr, SOCK_ADDRESS_INET_ANY, 0 );
+    vs->lsock = -1;
+
+    vnc_display_close(ds);
+    if (strcmp(display, "none") == 0)
+	return 0;
+
+    if (!(vs->display = strdup(display)))
+	return -1;
+
+    options = display;
+    while ((options = strchr(options, ','))) {
+	options++;
+	if (strncmp(options, "password", 8) == 0) {
+	    password = 1; /* Require password auth */
+	} else if (strncmp(options, "reverse", 7) == 0) {
+	    reverse = 1;
+#ifdef CONFIG_VNC_TLS
+	} else if (strncmp(options, "tls", 3) == 0) {
+	    tls = 1; /* Require TLS */
+	} else if (strncmp(options, "x509", 4) == 0) {
+	    char *start, *end;
+	    x509 = 1; /* Require x509 certificates */
+	    if (strncmp(options, "x509verify", 10) == 0)
+	        vs->x509verify = 1; /* ...and verify client certs */
+
+	    /* Now check for 'x509=/some/path' postfix
+	     * and use that to setup x509 certificate/key paths */
+	    start = strchr(options, '=');
+	    end = strchr(options, ',');
+	    if (start && (!end || (start < end))) {
+		int len = end ? end-(start+1) : strlen(start+1);
+		char *path = qemu_malloc(len+1);
+		strncpy(path, start+1, len);
+		path[len] = '\0';
+		VNC_DEBUG("Trying certificate path '%s'\n", path);
+		ret = vnc_set_x509_credential_dir(vs, path);
+                qemu_free(path);
+                if (ret < 0) {
+		    fprintf(stderr, "Failed to find x509 certificates/keys in %s\n", path);
+		    goto FAIL;
+		}
+	    } else {
+		fprintf(stderr, "No certificate path provided\n");
+		goto FAIL;
+	    }
+#endif
+	}
+    }
+
+    if (password) {
+#ifdef CONFIG_VNC_TLS
+	if (tls) {
+	    vs->auth = VNC_AUTH_VENCRYPT;
+	    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 {
+#endif
+	    VNC_DEBUG("Initializing VNC server with password auth\n");
+	    vs->auth = VNC_AUTH_VNC;
+#ifdef CONFIG_VNC_TLS
+	    vs->subauth = VNC_AUTH_INVALID;
+	}
+#endif
+    } else {
+#ifdef CONFIG_VNC_TLS
+	if (tls) {
+	    vs->auth = VNC_AUTH_VENCRYPT;
+	    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 {
+#endif
+	    VNC_DEBUG("Initializing VNC server with no auth\n");
+	    vs->auth = VNC_AUTH_NONE;
+#ifdef CONFIG_VNC_TLS
+	    vs->subauth = VNC_AUTH_INVALID;
+	}
+#endif
+    }
+#ifndef _WIN32
+    if (strstart(display, "unix:", &p)) {
+	sock_address_init_unix( &addr, p);
+	vs->lsock = socket_create( SOCKET_UNIX, SOCKET_STREAM );
+	if (vs->lsock == -1) {
+	    fprintf(stderr, "Could not create socket\n");
+	    goto FAIL;
+	}
+
+	if (!reverse) {
+	    unlink(p);
+	}
+    } else
+#endif
+    {
+	if (parse_host_port(&addr, display) < 0) {
+	    fprintf(stderr, "Could not parse VNC address\n");
+	    goto FAIL;
+	}
+
+	sock_address_set_port(&addr, reverse ? 0 : 5900);
+
+	vs->lsock = socket_create_inet( SOCKET_STREAM );
+	if (vs->lsock == -1) {
+	    fprintf(stderr, "Could not create socket\n");
+	    goto FAIL;
+	}
+
+	ret = socket_set_xreuseaddr(vs->lsock);
+	if (ret == -1) {
+	    fprintf(stderr, "setsockopt() failed\n");
+	    goto FAIL;
+	}
+    }
+
+    if (reverse) {
+        if (socket_connect(vs->lsock, &addr) == -1) {
+            fprintf(stderr, "Connection to VNC client failed\n");
+            goto FAIL;
+        }
+        vs->csock = vs->lsock;
+        vs->lsock = -1;
+        vnc_connect(vs);
+        return 0;
+    }
+
+    if (socket_bind(vs->lsock, &addr) == -1) {
+	fprintf(stderr, "bind() failed\n");
+	goto FAIL;
+    }
+
+    if (socket_listen(vs->lsock, 1) == -1) {
+	fprintf(stderr, "listen() failed\n");
+	goto FAIL;
+    }
+
+    return qemu_set_fd_handler2(vs->lsock, vnc_listen_poll, vnc_listen_read, NULL, vs);
+
+FAIL:
+    sock_address_done(&addr);
+
+    if (vs->lsock >= 0) {
+        socket_close(vs->lsock);
+        vs->lsock = -1;
+    }
+    free(vs->display);
+    vs->display = NULL;
+    return -1;
+}