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/*
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* QEMU VNC display driver
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*
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* Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>
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* Copyright (C) 2006 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu-common.h" |
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#include "console.h" |
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#include "sysemu.h" |
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#include "qemu_socket.h" |
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#include "qemu-timer.h" |
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#define VNC_REFRESH_INTERVAL (1000 / 30) |
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#include "vnc_keysym.h" |
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#include "keymaps.c" |
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#include "d3des.h" |
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#ifdef CONFIG_VNC_TLS
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#include <gnutls/gnutls.h> |
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#include <gnutls/x509.h> |
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#endif /* CONFIG_VNC_TLS */ |
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|
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// #define _VNC_DEBUG 1
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#ifdef _VNC_DEBUG
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#define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
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|
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#if CONFIG_VNC_TLS && _VNC_DEBUG >= 2 |
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/* Very verbose, so only enabled for _VNC_DEBUG >= 2 */
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static void vnc_debug_gnutls_log(int level, const char* str) { |
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VNC_DEBUG("%d %s", level, str);
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} |
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#endif /* CONFIG_VNC_TLS && _VNC_DEBUG */ |
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#else
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#define VNC_DEBUG(fmt, ...) do { } while (0) |
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#endif
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typedef struct Buffer |
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{
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size_t capacity; |
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size_t offset; |
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uint8_t *buffer; |
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} Buffer; |
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|
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typedef struct VncState VncState; |
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typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len); |
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typedef void VncWritePixels(VncState *vs, void *data, int size); |
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typedef void VncSendHextileTile(VncState *vs, |
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int x, int y, int w, int h, |
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uint32_t *last_bg, |
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uint32_t *last_fg, |
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int *has_bg, int *has_fg); |
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#define VNC_MAX_WIDTH 2048 |
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#define VNC_MAX_HEIGHT 2048 |
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#define VNC_DIRTY_WORDS (VNC_MAX_WIDTH / (16 * 32)) |
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#define VNC_AUTH_CHALLENGE_SIZE 16 |
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enum {
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VNC_AUTH_INVALID = 0,
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VNC_AUTH_NONE = 1,
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VNC_AUTH_VNC = 2,
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VNC_AUTH_RA2 = 5,
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VNC_AUTH_RA2NE = 6,
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VNC_AUTH_TIGHT = 16,
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VNC_AUTH_ULTRA = 17,
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VNC_AUTH_TLS = 18,
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VNC_AUTH_VENCRYPT = 19
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}; |
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#ifdef CONFIG_VNC_TLS
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enum {
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VNC_WIREMODE_CLEAR, |
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VNC_WIREMODE_TLS, |
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}; |
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enum {
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VNC_AUTH_VENCRYPT_PLAIN = 256,
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VNC_AUTH_VENCRYPT_TLSNONE = 257,
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VNC_AUTH_VENCRYPT_TLSVNC = 258,
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VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
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VNC_AUTH_VENCRYPT_X509NONE = 260,
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VNC_AUTH_VENCRYPT_X509VNC = 261,
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VNC_AUTH_VENCRYPT_X509PLAIN = 262,
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}; |
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#define X509_CA_CERT_FILE "ca-cert.pem" |
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#define X509_CA_CRL_FILE "ca-crl.pem" |
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#define X509_SERVER_KEY_FILE "server-key.pem" |
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#define X509_SERVER_CERT_FILE "server-cert.pem" |
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#endif /* CONFIG_VNC_TLS */ |
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struct VncState
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{
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QEMUTimer *timer; |
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int lsock;
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int csock;
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DisplayState *ds; |
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int need_update;
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int width;
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int height;
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uint32_t dirty_row[VNC_MAX_HEIGHT][VNC_DIRTY_WORDS]; |
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char *old_data;
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int depth; /* internal VNC frame buffer byte per pixel */ |
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int has_resize;
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int has_hextile;
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int has_pointer_type_change;
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int absolute;
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int last_x;
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int last_y;
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int major;
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int minor;
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char *display;
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char *password;
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int auth;
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#ifdef CONFIG_VNC_TLS
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int subauth;
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int x509verify;
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char *x509cacert;
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char *x509cacrl;
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char *x509cert;
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char *x509key;
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#endif
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char challenge[VNC_AUTH_CHALLENGE_SIZE];
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#ifdef CONFIG_VNC_TLS
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int wiremode;
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gnutls_session_t tls_session; |
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#endif
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Buffer output; |
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Buffer input; |
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kbd_layout_t *kbd_layout; |
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/* current output mode information */
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VncWritePixels *write_pixels; |
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VncSendHextileTile *send_hextile_tile; |
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int pix_bpp, pix_big_endian;
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int red_shift, red_max, red_shift1;
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int green_shift, green_max, green_shift1;
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int blue_shift, blue_max, blue_shift1;
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VncReadEvent *read_handler; |
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size_t read_handler_expect; |
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/* input */
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uint8_t modifiers_state[256];
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}; |
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static VncState *vnc_state; /* needed for info vnc */ |
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void do_info_vnc(void) |
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{
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if (vnc_state == NULL) |
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term_printf("VNC server disabled\n");
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else {
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term_printf("VNC server active on: ");
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term_print_filename(vnc_state->display); |
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term_printf("\n");
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if (vnc_state->csock == -1) |
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term_printf("No client connected\n");
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else
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term_printf("Client connected\n");
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} |
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} |
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/* TODO
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1) Get the queue working for IO.
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2) there is some weirdness when using the -S option (the screen is grey
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and not totally invalidated
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3) resolutions > 1024
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*/
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static void vnc_write(VncState *vs, const void *data, size_t len); |
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static void vnc_write_u32(VncState *vs, uint32_t value); |
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static void vnc_write_s32(VncState *vs, int32_t value); |
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static void vnc_write_u16(VncState *vs, uint16_t value); |
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static void vnc_write_u8(VncState *vs, uint8_t value); |
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static void vnc_flush(VncState *vs); |
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static void vnc_update_client(void *opaque); |
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static void vnc_client_read(void *opaque); |
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static inline void vnc_set_bit(uint32_t *d, int k) |
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{
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d[k >> 5] |= 1 << (k & 0x1f); |
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} |
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static inline void vnc_clear_bit(uint32_t *d, int k) |
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{
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d[k >> 5] &= ~(1 << (k & 0x1f)); |
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} |
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static inline void vnc_set_bits(uint32_t *d, int n, int nb_words) |
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{
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int j;
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j = 0;
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while (n >= 32) { |
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d[j++] = -1;
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n -= 32;
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} |
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if (n > 0) |
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d[j++] = (1 << n) - 1; |
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while (j < nb_words)
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d[j++] = 0;
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} |
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static inline int vnc_get_bit(const uint32_t *d, int k) |
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{
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return (d[k >> 5] >> (k & 0x1f)) & 1; |
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} |
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static inline int vnc_and_bits(const uint32_t *d1, const uint32_t *d2, |
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int nb_words)
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{
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int i;
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for(i = 0; i < nb_words; i++) { |
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if ((d1[i] & d2[i]) != 0) |
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return 1; |
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} |
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return 0; |
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} |
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static void vnc_dpy_update(DisplayState *ds, int x, int y, int w, int h) |
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{
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VncState *vs = ds->opaque; |
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int i;
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h += y; |
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/* round x down to ensure the loop only spans one 16-pixel block per,
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iteration. otherwise, if (x % 16) != 0, the last iteration may span
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two 16-pixel blocks but we only mark the first as dirty
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*/
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w += (x % 16);
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x -= (x % 16);
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x = MIN(x, vs->width); |
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y = MIN(y, vs->height); |
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w = MIN(x + w, vs->width) - x; |
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h = MIN(h, vs->height); |
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for (; y < h; y++)
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for (i = 0; i < w; i += 16) |
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vnc_set_bit(vs->dirty_row[y], (x + i) / 16);
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} |
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static void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h, |
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int32_t encoding) |
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{
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vnc_write_u16(vs, x); |
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vnc_write_u16(vs, y); |
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vnc_write_u16(vs, w); |
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vnc_write_u16(vs, h); |
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vnc_write_s32(vs, encoding); |
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} |
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static void vnc_dpy_resize(DisplayState *ds, int w, int h) |
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{
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int size_changed;
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VncState *vs = ds->opaque; |
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ds->data = qemu_realloc(ds->data, w * h * vs->depth); |
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vs->old_data = qemu_realloc(vs->old_data, w * h * vs->depth); |
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if (ds->data == NULL || vs->old_data == NULL) { |
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fprintf(stderr, "vnc: memory allocation failed\n");
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exit(1);
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} |
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|
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if (ds->depth != vs->depth * 8) { |
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ds->depth = vs->depth * 8;
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console_color_init(ds); |
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} |
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size_changed = ds->width != w || ds->height != h; |
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ds->width = w; |
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ds->height = h; |
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ds->linesize = w * vs->depth; |
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if (size_changed) {
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vs->width = ds->width; |
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vs->height = ds->height; |
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if (vs->csock != -1 && vs->has_resize) { |
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vnc_write_u8(vs, 0); /* msg id */ |
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vnc_write_u8(vs, 0);
|
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vnc_write_u16(vs, 1); /* number of rects */ |
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vnc_framebuffer_update(vs, 0, 0, ds->width, ds->height, -223); |
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vnc_flush(vs); |
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} |
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} |
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memset(vs->dirty_row, 0xFF, sizeof(vs->dirty_row)); |
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memset(vs->old_data, 42, vs->ds->linesize * vs->ds->height);
|
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} |
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/* fastest code */
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static void vnc_write_pixels_copy(VncState *vs, void *pixels, int size) |
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{
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vnc_write(vs, pixels, size); |
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} |
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|
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/* slowest but generic code. */
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static void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v) |
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{
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unsigned int r, g, b; |
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r = (v >> vs->red_shift1) & vs->red_max; |
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g = (v >> vs->green_shift1) & vs->green_max; |
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b = (v >> vs->blue_shift1) & vs->blue_max; |
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v = (r << vs->red_shift) | |
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(g << vs->green_shift) | |
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(b << vs->blue_shift); |
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switch(vs->pix_bpp) {
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case 1: |
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buf[0] = v;
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break;
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case 2: |
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if (vs->pix_big_endian) {
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buf[0] = v >> 8; |
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buf[1] = v;
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} else {
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buf[1] = v >> 8; |
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buf[0] = v;
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} |
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break;
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default:
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case 4: |
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if (vs->pix_big_endian) {
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buf[0] = v >> 24; |
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buf[1] = v >> 16; |
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buf[2] = v >> 8; |
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buf[3] = v;
|
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} else {
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buf[3] = v >> 24; |
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buf[2] = v >> 16; |
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buf[1] = v >> 8; |
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buf[0] = v;
|
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} |
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break;
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} |
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} |
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|
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static void vnc_write_pixels_generic(VncState *vs, void *pixels1, int size) |
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{
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uint32_t *pixels = pixels1; |
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uint8_t buf[4];
|
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int n, i;
|
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|
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n = size >> 2;
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for(i = 0; i < n; i++) { |
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vnc_convert_pixel(vs, buf, pixels[i]); |
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vnc_write(vs, buf, vs->pix_bpp); |
| 381 |
} |
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} |
| 383 |
|
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static void send_framebuffer_update_raw(VncState *vs, int x, int y, int w, int h) |
| 385 |
{
|
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int i;
|
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uint8_t *row; |
| 388 |
|
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vnc_framebuffer_update(vs, x, y, w, h, 0);
|
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|
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row = vs->ds->data + y * vs->ds->linesize + x * vs->depth; |
| 392 |
for (i = 0; i < h; i++) { |
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vs->write_pixels(vs, row, w * vs->depth); |
| 394 |
row += vs->ds->linesize; |
| 395 |
} |
| 396 |
} |
| 397 |
|
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static void hextile_enc_cord(uint8_t *ptr, int x, int y, int w, int h) |
| 399 |
{
|
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ptr[0] = ((x & 0x0F) << 4) | (y & 0x0F); |
| 401 |
ptr[1] = (((w - 1) & 0x0F) << 4) | ((h - 1) & 0x0F); |
| 402 |
} |
| 403 |
|
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#define BPP 8 |
| 405 |
#include "vnchextile.h" |
| 406 |
#undef BPP
|
| 407 |
|
| 408 |
#define BPP 16 |
| 409 |
#include "vnchextile.h" |
| 410 |
#undef BPP
|
| 411 |
|
| 412 |
#define BPP 32 |
| 413 |
#include "vnchextile.h" |
| 414 |
#undef BPP
|
| 415 |
|
| 416 |
#define GENERIC
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| 417 |
#define BPP 32 |
| 418 |
#include "vnchextile.h" |
| 419 |
#undef BPP
|
| 420 |
#undef GENERIC
|
| 421 |
|
| 422 |
static void send_framebuffer_update_hextile(VncState *vs, int x, int y, int w, int h) |
| 423 |
{
|
| 424 |
int i, j;
|
| 425 |
int has_fg, has_bg;
|
| 426 |
uint32_t last_fg32, last_bg32; |
| 427 |
|
| 428 |
vnc_framebuffer_update(vs, x, y, w, h, 5);
|
| 429 |
|
| 430 |
has_fg = has_bg = 0;
|
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for (j = y; j < (y + h); j += 16) { |
| 432 |
for (i = x; i < (x + w); i += 16) { |
| 433 |
vs->send_hextile_tile(vs, i, j, |
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MIN(16, x + w - i), MIN(16, y + h - j), |
| 435 |
&last_bg32, &last_fg32, &has_bg, &has_fg); |
| 436 |
} |
| 437 |
} |
| 438 |
} |
| 439 |
|
| 440 |
static void send_framebuffer_update(VncState *vs, int x, int y, int w, int h) |
| 441 |
{
|
| 442 |
if (vs->has_hextile)
|
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send_framebuffer_update_hextile(vs, x, y, w, h); |
| 444 |
else
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send_framebuffer_update_raw(vs, x, y, w, h); |
| 446 |
} |
| 447 |
|
| 448 |
static void vnc_copy(DisplayState *ds, int src_x, int src_y, int dst_x, int dst_y, int w, int h) |
| 449 |
{
|
| 450 |
int src, dst;
|
| 451 |
uint8_t *src_row; |
| 452 |
uint8_t *dst_row; |
| 453 |
char *old_row;
|
| 454 |
int y = 0; |
| 455 |
int pitch = ds->linesize;
|
| 456 |
VncState *vs = ds->opaque; |
| 457 |
|
| 458 |
vnc_update_client(vs); |
| 459 |
|
| 460 |
if (dst_y > src_y) {
|
| 461 |
y = h - 1;
|
| 462 |
pitch = -pitch; |
| 463 |
} |
| 464 |
|
| 465 |
src = (ds->linesize * (src_y + y) + vs->depth * src_x); |
| 466 |
dst = (ds->linesize * (dst_y + y) + vs->depth * dst_x); |
| 467 |
|
| 468 |
src_row = ds->data + src; |
| 469 |
dst_row = ds->data + dst; |
| 470 |
old_row = vs->old_data + dst; |
| 471 |
|
| 472 |
for (y = 0; y < h; y++) { |
| 473 |
memmove(old_row, src_row, w * vs->depth); |
| 474 |
memmove(dst_row, src_row, w * vs->depth); |
| 475 |
src_row += pitch; |
| 476 |
dst_row += pitch; |
| 477 |
old_row += pitch; |
| 478 |
} |
| 479 |
|
| 480 |
vnc_write_u8(vs, 0); /* msg id */ |
| 481 |
vnc_write_u8(vs, 0);
|
| 482 |
vnc_write_u16(vs, 1); /* number of rects */ |
| 483 |
vnc_framebuffer_update(vs, dst_x, dst_y, w, h, 1);
|
| 484 |
vnc_write_u16(vs, src_x); |
| 485 |
vnc_write_u16(vs, src_y); |
| 486 |
vnc_flush(vs); |
| 487 |
} |
| 488 |
|
| 489 |
static int find_dirty_height(VncState *vs, int y, int last_x, int x) |
| 490 |
{
|
| 491 |
int h;
|
| 492 |
|
| 493 |
for (h = 1; h < (vs->height - y); h++) { |
| 494 |
int tmp_x;
|
| 495 |
if (!vnc_get_bit(vs->dirty_row[y + h], last_x))
|
| 496 |
break;
|
| 497 |
for (tmp_x = last_x; tmp_x < x; tmp_x++)
|
| 498 |
vnc_clear_bit(vs->dirty_row[y + h], tmp_x); |
| 499 |
} |
| 500 |
|
| 501 |
return h;
|
| 502 |
} |
| 503 |
|
| 504 |
static void vnc_update_client(void *opaque) |
| 505 |
{
|
| 506 |
VncState *vs = opaque; |
| 507 |
|
| 508 |
if (vs->need_update && vs->csock != -1) { |
| 509 |
int y;
|
| 510 |
uint8_t *row; |
| 511 |
char *old_row;
|
| 512 |
uint32_t width_mask[VNC_DIRTY_WORDS]; |
| 513 |
int n_rectangles;
|
| 514 |
int saved_offset;
|
| 515 |
int has_dirty = 0; |
| 516 |
|
| 517 |
vga_hw_update(); |
| 518 |
|
| 519 |
vnc_set_bits(width_mask, (vs->width / 16), VNC_DIRTY_WORDS);
|
| 520 |
|
| 521 |
/* Walk through the dirty map and eliminate tiles that
|
| 522 |
really aren't dirty */
|
| 523 |
row = vs->ds->data; |
| 524 |
old_row = vs->old_data; |
| 525 |
|
| 526 |
for (y = 0; y < vs->height; y++) { |
| 527 |
if (vnc_and_bits(vs->dirty_row[y], width_mask, VNC_DIRTY_WORDS)) {
|
| 528 |
int x;
|
| 529 |
uint8_t *ptr; |
| 530 |
char *old_ptr;
|
| 531 |
|
| 532 |
ptr = row; |
| 533 |
old_ptr = (char*)old_row;
|
| 534 |
|
| 535 |
for (x = 0; x < vs->ds->width; x += 16) { |
| 536 |
if (memcmp(old_ptr, ptr, 16 * vs->depth) == 0) { |
| 537 |
vnc_clear_bit(vs->dirty_row[y], (x / 16));
|
| 538 |
} else {
|
| 539 |
has_dirty = 1;
|
| 540 |
memcpy(old_ptr, ptr, 16 * vs->depth);
|
| 541 |
} |
| 542 |
|
| 543 |
ptr += 16 * vs->depth;
|
| 544 |
old_ptr += 16 * vs->depth;
|
| 545 |
} |
| 546 |
} |
| 547 |
|
| 548 |
row += vs->ds->linesize; |
| 549 |
old_row += vs->ds->linesize; |
| 550 |
} |
| 551 |
|
| 552 |
if (!has_dirty) {
|
| 553 |
qemu_mod_timer(vs->timer, qemu_get_clock(rt_clock) + VNC_REFRESH_INTERVAL); |
| 554 |
return;
|
| 555 |
} |
| 556 |
|
| 557 |
/* Count rectangles */
|
| 558 |
n_rectangles = 0;
|
| 559 |
vnc_write_u8(vs, 0); /* msg id */ |
| 560 |
vnc_write_u8(vs, 0);
|
| 561 |
saved_offset = vs->output.offset; |
| 562 |
vnc_write_u16(vs, 0);
|
| 563 |
|
| 564 |
for (y = 0; y < vs->height; y++) { |
| 565 |
int x;
|
| 566 |
int last_x = -1; |
| 567 |
for (x = 0; x < vs->width / 16; x++) { |
| 568 |
if (vnc_get_bit(vs->dirty_row[y], x)) {
|
| 569 |
if (last_x == -1) { |
| 570 |
last_x = x; |
| 571 |
} |
| 572 |
vnc_clear_bit(vs->dirty_row[y], x); |
| 573 |
} else {
|
| 574 |
if (last_x != -1) { |
| 575 |
int h = find_dirty_height(vs, y, last_x, x);
|
| 576 |
send_framebuffer_update(vs, last_x * 16, y, (x - last_x) * 16, h); |
| 577 |
n_rectangles++; |
| 578 |
} |
| 579 |
last_x = -1;
|
| 580 |
} |
| 581 |
} |
| 582 |
if (last_x != -1) { |
| 583 |
int h = find_dirty_height(vs, y, last_x, x);
|
| 584 |
send_framebuffer_update(vs, last_x * 16, y, (x - last_x) * 16, h); |
| 585 |
n_rectangles++; |
| 586 |
} |
| 587 |
} |
| 588 |
vs->output.buffer[saved_offset] = (n_rectangles >> 8) & 0xFF; |
| 589 |
vs->output.buffer[saved_offset + 1] = n_rectangles & 0xFF; |
| 590 |
vnc_flush(vs); |
| 591 |
|
| 592 |
} |
| 593 |
|
| 594 |
if (vs->csock != -1) { |
| 595 |
qemu_mod_timer(vs->timer, qemu_get_clock(rt_clock) + VNC_REFRESH_INTERVAL); |
| 596 |
} |
| 597 |
|
| 598 |
} |
| 599 |
|
| 600 |
static int vnc_listen_poll(void *opaque) |
| 601 |
{
|
| 602 |
VncState *vs = opaque; |
| 603 |
if (vs->csock == -1) |
| 604 |
return 1; |
| 605 |
return 0; |
| 606 |
} |
| 607 |
|
| 608 |
static void buffer_reserve(Buffer *buffer, size_t len) |
| 609 |
{
|
| 610 |
if ((buffer->capacity - buffer->offset) < len) {
|
| 611 |
buffer->capacity += (len + 1024);
|
| 612 |
buffer->buffer = qemu_realloc(buffer->buffer, buffer->capacity); |
| 613 |
if (buffer->buffer == NULL) { |
| 614 |
fprintf(stderr, "vnc: out of memory\n");
|
| 615 |
exit(1);
|
| 616 |
} |
| 617 |
} |
| 618 |
} |
| 619 |
|
| 620 |
static int buffer_empty(Buffer *buffer) |
| 621 |
{
|
| 622 |
return buffer->offset == 0; |
| 623 |
} |
| 624 |
|
| 625 |
static uint8_t *buffer_end(Buffer *buffer)
|
| 626 |
{
|
| 627 |
return buffer->buffer + buffer->offset;
|
| 628 |
} |
| 629 |
|
| 630 |
static void buffer_reset(Buffer *buffer) |
| 631 |
{
|
| 632 |
buffer->offset = 0;
|
| 633 |
} |
| 634 |
|
| 635 |
static void buffer_append(Buffer *buffer, const void *data, size_t len) |
| 636 |
{
|
| 637 |
memcpy(buffer->buffer + buffer->offset, data, len); |
| 638 |
buffer->offset += len; |
| 639 |
} |
| 640 |
|
| 641 |
static int vnc_client_io_error(VncState *vs, int ret, int last_errno) |
| 642 |
{
|
| 643 |
if (ret == 0 || ret == -1) { |
| 644 |
if (ret == -1) { |
| 645 |
switch (last_errno) {
|
| 646 |
case EINTR:
|
| 647 |
case EAGAIN:
|
| 648 |
#ifdef _WIN32
|
| 649 |
case WSAEWOULDBLOCK:
|
| 650 |
#endif
|
| 651 |
return 0; |
| 652 |
default:
|
| 653 |
break;
|
| 654 |
} |
| 655 |
} |
| 656 |
|
| 657 |
VNC_DEBUG("Closing down client sock %d %d\n", ret, ret < 0 ? last_errno : 0); |
| 658 |
qemu_set_fd_handler2(vs->csock, NULL, NULL, NULL, NULL); |
| 659 |
closesocket(vs->csock); |
| 660 |
vs->csock = -1;
|
| 661 |
vs->ds->idle = 1;
|
| 662 |
buffer_reset(&vs->input); |
| 663 |
buffer_reset(&vs->output); |
| 664 |
vs->need_update = 0;
|
| 665 |
#ifdef CONFIG_VNC_TLS
|
| 666 |
if (vs->tls_session) {
|
| 667 |
gnutls_deinit(vs->tls_session); |
| 668 |
vs->tls_session = NULL;
|
| 669 |
} |
| 670 |
vs->wiremode = VNC_WIREMODE_CLEAR; |
| 671 |
#endif /* CONFIG_VNC_TLS */ |
| 672 |
return 0; |
| 673 |
} |
| 674 |
return ret;
|
| 675 |
} |
| 676 |
|
| 677 |
static void vnc_client_error(VncState *vs) |
| 678 |
{
|
| 679 |
vnc_client_io_error(vs, -1, EINVAL);
|
| 680 |
} |
| 681 |
|
| 682 |
static void vnc_client_write(void *opaque) |
| 683 |
{
|
| 684 |
long ret;
|
| 685 |
VncState *vs = opaque; |
| 686 |
|
| 687 |
#ifdef CONFIG_VNC_TLS
|
| 688 |
if (vs->tls_session) {
|
| 689 |
ret = gnutls_write(vs->tls_session, vs->output.buffer, vs->output.offset); |
| 690 |
if (ret < 0) { |
| 691 |
if (ret == GNUTLS_E_AGAIN)
|
| 692 |
errno = EAGAIN; |
| 693 |
else
|
| 694 |
errno = EIO; |
| 695 |
ret = -1;
|
| 696 |
} |
| 697 |
} else
|
| 698 |
#endif /* CONFIG_VNC_TLS */ |
| 699 |
ret = send(vs->csock, vs->output.buffer, vs->output.offset, 0);
|
| 700 |
ret = vnc_client_io_error(vs, ret, socket_error()); |
| 701 |
if (!ret)
|
| 702 |
return;
|
| 703 |
|
| 704 |
memmove(vs->output.buffer, vs->output.buffer + ret, (vs->output.offset - ret)); |
| 705 |
vs->output.offset -= ret; |
| 706 |
|
| 707 |
if (vs->output.offset == 0) { |
| 708 |
qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs); |
| 709 |
} |
| 710 |
} |
| 711 |
|
| 712 |
static void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting) |
| 713 |
{
|
| 714 |
vs->read_handler = func; |
| 715 |
vs->read_handler_expect = expecting; |
| 716 |
} |
| 717 |
|
| 718 |
static void vnc_client_read(void *opaque) |
| 719 |
{
|
| 720 |
VncState *vs = opaque; |
| 721 |
long ret;
|
| 722 |
|
| 723 |
buffer_reserve(&vs->input, 4096);
|
| 724 |
|
| 725 |
#ifdef CONFIG_VNC_TLS
|
| 726 |
if (vs->tls_session) {
|
| 727 |
ret = gnutls_read(vs->tls_session, buffer_end(&vs->input), 4096);
|
| 728 |
if (ret < 0) { |
| 729 |
if (ret == GNUTLS_E_AGAIN)
|
| 730 |
errno = EAGAIN; |
| 731 |
else
|
| 732 |
errno = EIO; |
| 733 |
ret = -1;
|
| 734 |
} |
| 735 |
} else
|
| 736 |
#endif /* CONFIG_VNC_TLS */ |
| 737 |
ret = recv(vs->csock, buffer_end(&vs->input), 4096, 0); |
| 738 |
ret = vnc_client_io_error(vs, ret, socket_error()); |
| 739 |
if (!ret)
|
| 740 |
return;
|
| 741 |
|
| 742 |
vs->input.offset += ret; |
| 743 |
|
| 744 |
while (vs->read_handler && vs->input.offset >= vs->read_handler_expect) {
|
| 745 |
size_t len = vs->read_handler_expect; |
| 746 |
int ret;
|
| 747 |
|
| 748 |
ret = vs->read_handler(vs, vs->input.buffer, len); |
| 749 |
if (vs->csock == -1) |
| 750 |
return;
|
| 751 |
|
| 752 |
if (!ret) {
|
| 753 |
memmove(vs->input.buffer, vs->input.buffer + len, (vs->input.offset - len)); |
| 754 |
vs->input.offset -= len; |
| 755 |
} else {
|
| 756 |
vs->read_handler_expect = ret; |
| 757 |
} |
| 758 |
} |
| 759 |
} |
| 760 |
|
| 761 |
static void vnc_write(VncState *vs, const void *data, size_t len) |
| 762 |
{
|
| 763 |
buffer_reserve(&vs->output, len); |
| 764 |
|
| 765 |
if (buffer_empty(&vs->output)) {
|
| 766 |
qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, vnc_client_write, vs);
|
| 767 |
} |
| 768 |
|
| 769 |
buffer_append(&vs->output, data, len); |
| 770 |
} |
| 771 |
|
| 772 |
static void vnc_write_s32(VncState *vs, int32_t value) |
| 773 |
{
|
| 774 |
vnc_write_u32(vs, *(uint32_t *)&value); |
| 775 |
} |
| 776 |
|
| 777 |
static void vnc_write_u32(VncState *vs, uint32_t value) |
| 778 |
{
|
| 779 |
uint8_t buf[4];
|
| 780 |
|
| 781 |
buf[0] = (value >> 24) & 0xFF; |
| 782 |
buf[1] = (value >> 16) & 0xFF; |
| 783 |
buf[2] = (value >> 8) & 0xFF; |
| 784 |
buf[3] = value & 0xFF; |
| 785 |
|
| 786 |
vnc_write(vs, buf, 4);
|
| 787 |
} |
| 788 |
|
| 789 |
static void vnc_write_u16(VncState *vs, uint16_t value) |
| 790 |
{
|
| 791 |
uint8_t buf[2];
|
| 792 |
|
| 793 |
buf[0] = (value >> 8) & 0xFF; |
| 794 |
buf[1] = value & 0xFF; |
| 795 |
|
| 796 |
vnc_write(vs, buf, 2);
|
| 797 |
} |
| 798 |
|
| 799 |
static void vnc_write_u8(VncState *vs, uint8_t value) |
| 800 |
{
|
| 801 |
vnc_write(vs, (char *)&value, 1); |
| 802 |
} |
| 803 |
|
| 804 |
static void vnc_flush(VncState *vs) |
| 805 |
{
|
| 806 |
if (vs->output.offset)
|
| 807 |
vnc_client_write(vs); |
| 808 |
} |
| 809 |
|
| 810 |
static uint8_t read_u8(uint8_t *data, size_t offset)
|
| 811 |
{
|
| 812 |
return data[offset];
|
| 813 |
} |
| 814 |
|
| 815 |
static uint16_t read_u16(uint8_t *data, size_t offset)
|
| 816 |
{
|
| 817 |
return ((data[offset] & 0xFF) << 8) | (data[offset + 1] & 0xFF); |
| 818 |
} |
| 819 |
|
| 820 |
static int32_t read_s32(uint8_t *data, size_t offset)
|
| 821 |
{
|
| 822 |
return (int32_t)((data[offset] << 24) | (data[offset + 1] << 16) | |
| 823 |
(data[offset + 2] << 8) | data[offset + 3]); |
| 824 |
} |
| 825 |
|
| 826 |
static uint32_t read_u32(uint8_t *data, size_t offset)
|
| 827 |
{
|
| 828 |
return ((data[offset] << 24) | (data[offset + 1] << 16) | |
| 829 |
(data[offset + 2] << 8) | data[offset + 3]); |
| 830 |
} |
| 831 |
|
| 832 |
#ifdef CONFIG_VNC_TLS
|
| 833 |
static ssize_t vnc_tls_push(gnutls_transport_ptr_t transport,
|
| 834 |
const void *data, |
| 835 |
size_t len) {
|
| 836 |
struct VncState *vs = (struct VncState *)transport; |
| 837 |
int ret;
|
| 838 |
|
| 839 |
retry:
|
| 840 |
ret = send(vs->csock, data, len, 0);
|
| 841 |
if (ret < 0) { |
| 842 |
if (errno == EINTR)
|
| 843 |
goto retry;
|
| 844 |
return -1; |
| 845 |
} |
| 846 |
return ret;
|
| 847 |
} |
| 848 |
|
| 849 |
|
| 850 |
static ssize_t vnc_tls_pull(gnutls_transport_ptr_t transport,
|
| 851 |
void *data,
|
| 852 |
size_t len) {
|
| 853 |
struct VncState *vs = (struct VncState *)transport; |
| 854 |
int ret;
|
| 855 |
|
| 856 |
retry:
|
| 857 |
ret = recv(vs->csock, data, len, 0);
|
| 858 |
if (ret < 0) { |
| 859 |
if (errno == EINTR)
|
| 860 |
goto retry;
|
| 861 |
return -1; |
| 862 |
} |
| 863 |
return ret;
|
| 864 |
} |
| 865 |
#endif /* CONFIG_VNC_TLS */ |
| 866 |
|
| 867 |
static void client_cut_text(VncState *vs, size_t len, uint8_t *text) |
| 868 |
{
|
| 869 |
} |
| 870 |
|
| 871 |
static void check_pointer_type_change(VncState *vs, int absolute) |
| 872 |
{
|
| 873 |
if (vs->has_pointer_type_change && vs->absolute != absolute) {
|
| 874 |
vnc_write_u8(vs, 0);
|
| 875 |
vnc_write_u8(vs, 0);
|
| 876 |
vnc_write_u16(vs, 1);
|
| 877 |
vnc_framebuffer_update(vs, absolute, 0,
|
| 878 |
vs->ds->width, vs->ds->height, -257);
|
| 879 |
vnc_flush(vs); |
| 880 |
} |
| 881 |
vs->absolute = absolute; |
| 882 |
} |
| 883 |
|
| 884 |
static void pointer_event(VncState *vs, int button_mask, int x, int y) |
| 885 |
{
|
| 886 |
int buttons = 0; |
| 887 |
int dz = 0; |
| 888 |
|
| 889 |
if (button_mask & 0x01) |
| 890 |
buttons |= MOUSE_EVENT_LBUTTON; |
| 891 |
if (button_mask & 0x02) |
| 892 |
buttons |= MOUSE_EVENT_MBUTTON; |
| 893 |
if (button_mask & 0x04) |
| 894 |
buttons |= MOUSE_EVENT_RBUTTON; |
| 895 |
if (button_mask & 0x08) |
| 896 |
dz = -1;
|
| 897 |
if (button_mask & 0x10) |
| 898 |
dz = 1;
|
| 899 |
|
| 900 |
if (vs->absolute) {
|
| 901 |
kbd_mouse_event(x * 0x7FFF / (vs->ds->width - 1), |
| 902 |
y * 0x7FFF / (vs->ds->height - 1), |
| 903 |
dz, buttons); |
| 904 |
} else if (vs->has_pointer_type_change) { |
| 905 |
x -= 0x7FFF;
|
| 906 |
y -= 0x7FFF;
|
| 907 |
|
| 908 |
kbd_mouse_event(x, y, dz, buttons); |
| 909 |
} else {
|
| 910 |
if (vs->last_x != -1) |
| 911 |
kbd_mouse_event(x - vs->last_x, |
| 912 |
y - vs->last_y, |
| 913 |
dz, buttons); |
| 914 |
vs->last_x = x; |
| 915 |
vs->last_y = y; |
| 916 |
} |
| 917 |
|
| 918 |
check_pointer_type_change(vs, kbd_mouse_is_absolute()); |
| 919 |
} |
| 920 |
|
| 921 |
static void reset_keys(VncState *vs) |
| 922 |
{
|
| 923 |
int i;
|
| 924 |
for(i = 0; i < 256; i++) { |
| 925 |
if (vs->modifiers_state[i]) {
|
| 926 |
if (i & 0x80) |
| 927 |
kbd_put_keycode(0xe0);
|
| 928 |
kbd_put_keycode(i | 0x80);
|
| 929 |
vs->modifiers_state[i] = 0;
|
| 930 |
} |
| 931 |
} |
| 932 |
} |
| 933 |
|
| 934 |
static void press_key(VncState *vs, int keysym) |
| 935 |
{
|
| 936 |
kbd_put_keycode(keysym2scancode(vs->kbd_layout, keysym) & 0x7f);
|
| 937 |
kbd_put_keycode(keysym2scancode(vs->kbd_layout, keysym) | 0x80);
|
| 938 |
} |
| 939 |
|
| 940 |
static void do_key_event(VncState *vs, int down, int keycode, int sym) |
| 941 |
{
|
| 942 |
/* QEMU console switch */
|
| 943 |
switch(keycode) {
|
| 944 |
case 0x2a: /* Left Shift */ |
| 945 |
case 0x36: /* Right Shift */ |
| 946 |
case 0x1d: /* Left CTRL */ |
| 947 |
case 0x9d: /* Right CTRL */ |
| 948 |
case 0x38: /* Left ALT */ |
| 949 |
case 0xb8: /* Right ALT */ |
| 950 |
if (down)
|
| 951 |
vs->modifiers_state[keycode] = 1;
|
| 952 |
else
|
| 953 |
vs->modifiers_state[keycode] = 0;
|
| 954 |
break;
|
| 955 |
case 0x02 ... 0x0a: /* '1' to '9' keys */ |
| 956 |
if (down && vs->modifiers_state[0x1d] && vs->modifiers_state[0x38]) { |
| 957 |
/* Reset the modifiers sent to the current console */
|
| 958 |
reset_keys(vs); |
| 959 |
console_select(keycode - 0x02);
|
| 960 |
return;
|
| 961 |
} |
| 962 |
break;
|
| 963 |
case 0x3a: /* CapsLock */ |
| 964 |
case 0x45: /* NumLock */ |
| 965 |
if (!down)
|
| 966 |
vs->modifiers_state[keycode] ^= 1;
|
| 967 |
break;
|
| 968 |
} |
| 969 |
|
| 970 |
if (keycode_is_keypad(vs->kbd_layout, keycode)) {
|
| 971 |
/* If the numlock state needs to change then simulate an additional
|
| 972 |
keypress before sending this one. This will happen if the user
|
| 973 |
toggles numlock away from the VNC window.
|
| 974 |
*/
|
| 975 |
if (keysym_is_numlock(vs->kbd_layout, sym & 0xFFFF)) { |
| 976 |
if (!vs->modifiers_state[0x45]) { |
| 977 |
vs->modifiers_state[0x45] = 1; |
| 978 |
press_key(vs, 0xff7f);
|
| 979 |
} |
| 980 |
} else {
|
| 981 |
if (vs->modifiers_state[0x45]) { |
| 982 |
vs->modifiers_state[0x45] = 0; |
| 983 |
press_key(vs, 0xff7f);
|
| 984 |
} |
| 985 |
} |
| 986 |
} |
| 987 |
|
| 988 |
if (is_graphic_console()) {
|
| 989 |
if (keycode & 0x80) |
| 990 |
kbd_put_keycode(0xe0);
|
| 991 |
if (down)
|
| 992 |
kbd_put_keycode(keycode & 0x7f);
|
| 993 |
else
|
| 994 |
kbd_put_keycode(keycode | 0x80);
|
| 995 |
} else {
|
| 996 |
/* QEMU console emulation */
|
| 997 |
if (down) {
|
| 998 |
switch (keycode) {
|
| 999 |
case 0x2a: /* Left Shift */ |
| 1000 |
case 0x36: /* Right Shift */ |
| 1001 |
case 0x1d: /* Left CTRL */ |
| 1002 |
case 0x9d: /* Right CTRL */ |
| 1003 |
case 0x38: /* Left ALT */ |
| 1004 |
case 0xb8: /* Right ALT */ |
| 1005 |
break;
|
| 1006 |
case 0xc8: |
| 1007 |
kbd_put_keysym(QEMU_KEY_UP); |
| 1008 |
break;
|
| 1009 |
case 0xd0: |
| 1010 |
kbd_put_keysym(QEMU_KEY_DOWN); |
| 1011 |
break;
|
| 1012 |
case 0xcb: |
| 1013 |
kbd_put_keysym(QEMU_KEY_LEFT); |
| 1014 |
break;
|
| 1015 |
case 0xcd: |
| 1016 |
kbd_put_keysym(QEMU_KEY_RIGHT); |
| 1017 |
break;
|
| 1018 |
case 0xd3: |
| 1019 |
kbd_put_keysym(QEMU_KEY_DELETE); |
| 1020 |
break;
|
| 1021 |
case 0xc7: |
| 1022 |
kbd_put_keysym(QEMU_KEY_HOME); |
| 1023 |
break;
|
| 1024 |
case 0xcf: |
| 1025 |
kbd_put_keysym(QEMU_KEY_END); |
| 1026 |
break;
|
| 1027 |
case 0xc9: |
| 1028 |
kbd_put_keysym(QEMU_KEY_PAGEUP); |
| 1029 |
break;
|
| 1030 |
case 0xd1: |
| 1031 |
kbd_put_keysym(QEMU_KEY_PAGEDOWN); |
| 1032 |
break;
|
| 1033 |
default:
|
| 1034 |
kbd_put_keysym(sym); |
| 1035 |
break;
|
| 1036 |
} |
| 1037 |
} |
| 1038 |
} |
| 1039 |
} |
| 1040 |
|
| 1041 |
static void key_event(VncState *vs, int down, uint32_t sym) |
| 1042 |
{
|
| 1043 |
int keycode;
|
| 1044 |
|
| 1045 |
if (sym >= 'A' && sym <= 'Z' && is_graphic_console()) |
| 1046 |
sym = sym - 'A' + 'a'; |
| 1047 |
|
| 1048 |
keycode = keysym2scancode(vs->kbd_layout, sym & 0xFFFF);
|
| 1049 |
do_key_event(vs, down, keycode, sym); |
| 1050 |
} |
| 1051 |
|
| 1052 |
static void ext_key_event(VncState *vs, int down, |
| 1053 |
uint32_t sym, uint16_t keycode) |
| 1054 |
{
|
| 1055 |
/* if the user specifies a keyboard layout, always use it */
|
| 1056 |
if (keyboard_layout)
|
| 1057 |
key_event(vs, down, sym); |
| 1058 |
else
|
| 1059 |
do_key_event(vs, down, keycode, sym); |
| 1060 |
} |
| 1061 |
|
| 1062 |
static void framebuffer_update_request(VncState *vs, int incremental, |
| 1063 |
int x_position, int y_position, |
| 1064 |
int w, int h) |
| 1065 |
{
|
| 1066 |
if (x_position > vs->ds->width)
|
| 1067 |
x_position = vs->ds->width; |
| 1068 |
if (y_position > vs->ds->height)
|
| 1069 |
y_position = vs->ds->height; |
| 1070 |
if (x_position + w >= vs->ds->width)
|
| 1071 |
w = vs->ds->width - x_position; |
| 1072 |
if (y_position + h >= vs->ds->height)
|
| 1073 |
h = vs->ds->height - y_position; |
| 1074 |
|
| 1075 |
int i;
|
| 1076 |
vs->need_update = 1;
|
| 1077 |
if (!incremental) {
|
| 1078 |
char *old_row = vs->old_data + y_position * vs->ds->linesize;
|
| 1079 |
|
| 1080 |
for (i = 0; i < h; i++) { |
| 1081 |
vnc_set_bits(vs->dirty_row[y_position + i], |
| 1082 |
(vs->ds->width / 16), VNC_DIRTY_WORDS);
|
| 1083 |
memset(old_row, 42, vs->ds->width * vs->depth);
|
| 1084 |
old_row += vs->ds->linesize; |
| 1085 |
} |
| 1086 |
} |
| 1087 |
} |
| 1088 |
|
| 1089 |
static void send_ext_key_event_ack(VncState *vs) |
| 1090 |
{
|
| 1091 |
vnc_write_u8(vs, 0);
|
| 1092 |
vnc_write_u8(vs, 0);
|
| 1093 |
vnc_write_u16(vs, 1);
|
| 1094 |
vnc_framebuffer_update(vs, 0, 0, vs->ds->width, vs->ds->height, -258); |
| 1095 |
vnc_flush(vs); |
| 1096 |
} |
| 1097 |
|
| 1098 |
static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings) |
| 1099 |
{
|
| 1100 |
int i;
|
| 1101 |
|
| 1102 |
vs->has_hextile = 0;
|
| 1103 |
vs->has_resize = 0;
|
| 1104 |
vs->has_pointer_type_change = 0;
|
| 1105 |
vs->absolute = -1;
|
| 1106 |
vs->ds->dpy_copy = NULL;
|
| 1107 |
|
| 1108 |
for (i = n_encodings - 1; i >= 0; i--) { |
| 1109 |
switch (encodings[i]) {
|
| 1110 |
case 0: /* Raw */ |
| 1111 |
vs->has_hextile = 0;
|
| 1112 |
break;
|
| 1113 |
case 1: /* CopyRect */ |
| 1114 |
vs->ds->dpy_copy = vnc_copy; |
| 1115 |
break;
|
| 1116 |
case 5: /* Hextile */ |
| 1117 |
vs->has_hextile = 1;
|
| 1118 |
break;
|
| 1119 |
case -223: /* DesktopResize */ |
| 1120 |
vs->has_resize = 1;
|
| 1121 |
break;
|
| 1122 |
case -257: |
| 1123 |
vs->has_pointer_type_change = 1;
|
| 1124 |
break;
|
| 1125 |
case -258: |
| 1126 |
send_ext_key_event_ack(vs); |
| 1127 |
break;
|
| 1128 |
default:
|
| 1129 |
break;
|
| 1130 |
} |
| 1131 |
} |
| 1132 |
|
| 1133 |
check_pointer_type_change(vs, kbd_mouse_is_absolute()); |
| 1134 |
} |
| 1135 |
|
| 1136 |
static int compute_nbits(unsigned int val) |
| 1137 |
{
|
| 1138 |
int n;
|
| 1139 |
n = 0;
|
| 1140 |
while (val != 0) { |
| 1141 |
n++; |
| 1142 |
val >>= 1;
|
| 1143 |
} |
| 1144 |
return n;
|
| 1145 |
} |
| 1146 |
|
| 1147 |
static void set_pixel_format(VncState *vs, |
| 1148 |
int bits_per_pixel, int depth, |
| 1149 |
int big_endian_flag, int true_color_flag, |
| 1150 |
int red_max, int green_max, int blue_max, |
| 1151 |
int red_shift, int green_shift, int blue_shift) |
| 1152 |
{
|
| 1153 |
int host_big_endian_flag;
|
| 1154 |
|
| 1155 |
#ifdef WORDS_BIGENDIAN
|
| 1156 |
host_big_endian_flag = 1;
|
| 1157 |
#else
|
| 1158 |
host_big_endian_flag = 0;
|
| 1159 |
#endif
|
| 1160 |
if (!true_color_flag) {
|
| 1161 |
fail:
|
| 1162 |
vnc_client_error(vs); |
| 1163 |
return;
|
| 1164 |
} |
| 1165 |
if (bits_per_pixel == 32 && |
| 1166 |
host_big_endian_flag == big_endian_flag && |
| 1167 |
red_max == 0xff && green_max == 0xff && blue_max == 0xff && |
| 1168 |
red_shift == 16 && green_shift == 8 && blue_shift == 0) { |
| 1169 |
vs->depth = 4;
|
| 1170 |
vs->write_pixels = vnc_write_pixels_copy; |
| 1171 |
vs->send_hextile_tile = send_hextile_tile_32; |
| 1172 |
} else
|
| 1173 |
if (bits_per_pixel == 16 && |
| 1174 |
host_big_endian_flag == big_endian_flag && |
| 1175 |
red_max == 31 && green_max == 63 && blue_max == 31 && |
| 1176 |
red_shift == 11 && green_shift == 5 && blue_shift == 0) { |
| 1177 |
vs->depth = 2;
|
| 1178 |
vs->write_pixels = vnc_write_pixels_copy; |
| 1179 |
vs->send_hextile_tile = send_hextile_tile_16; |
| 1180 |
} else
|
| 1181 |
if (bits_per_pixel == 8 && |
| 1182 |
red_max == 7 && green_max == 7 && blue_max == 3 && |
| 1183 |
red_shift == 5 && green_shift == 2 && blue_shift == 0) { |
| 1184 |
vs->depth = 1;
|
| 1185 |
vs->write_pixels = vnc_write_pixels_copy; |
| 1186 |
vs->send_hextile_tile = send_hextile_tile_8; |
| 1187 |
} else
|
| 1188 |
{
|
| 1189 |
/* generic and slower case */
|
| 1190 |
if (bits_per_pixel != 8 && |
| 1191 |
bits_per_pixel != 16 &&
|
| 1192 |
bits_per_pixel != 32)
|
| 1193 |
goto fail;
|
| 1194 |
vs->depth = 4;
|
| 1195 |
vs->red_shift = red_shift; |
| 1196 |
vs->red_max = red_max; |
| 1197 |
vs->red_shift1 = 24 - compute_nbits(red_max);
|
| 1198 |
vs->green_shift = green_shift; |
| 1199 |
vs->green_max = green_max; |
| 1200 |
vs->green_shift1 = 16 - compute_nbits(green_max);
|
| 1201 |
vs->blue_shift = blue_shift; |
| 1202 |
vs->blue_max = blue_max; |
| 1203 |
vs->blue_shift1 = 8 - compute_nbits(blue_max);
|
| 1204 |
vs->pix_bpp = bits_per_pixel / 8;
|
| 1205 |
vs->pix_big_endian = big_endian_flag; |
| 1206 |
vs->write_pixels = vnc_write_pixels_generic; |
| 1207 |
vs->send_hextile_tile = send_hextile_tile_generic; |
| 1208 |
} |
| 1209 |
|
| 1210 |
vnc_dpy_resize(vs->ds, vs->ds->width, vs->ds->height); |
| 1211 |
|
| 1212 |
vga_hw_invalidate(); |
| 1213 |
vga_hw_update(); |
| 1214 |
} |
| 1215 |
|
| 1216 |
static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len) |
| 1217 |
{
|
| 1218 |
int i;
|
| 1219 |
uint16_t limit; |
| 1220 |
|
| 1221 |
switch (data[0]) { |
| 1222 |
case 0: |
| 1223 |
if (len == 1) |
| 1224 |
return 20; |
| 1225 |
|
| 1226 |
set_pixel_format(vs, read_u8(data, 4), read_u8(data, 5), |
| 1227 |
read_u8(data, 6), read_u8(data, 7), |
| 1228 |
read_u16(data, 8), read_u16(data, 10), |
| 1229 |
read_u16(data, 12), read_u8(data, 14), |
| 1230 |
read_u8(data, 15), read_u8(data, 16)); |
| 1231 |
break;
|
| 1232 |
case 2: |
| 1233 |
if (len == 1) |
| 1234 |
return 4; |
| 1235 |
|
| 1236 |
if (len == 4) |
| 1237 |
return 4 + (read_u16(data, 2) * 4); |
| 1238 |
|
| 1239 |
limit = read_u16(data, 2);
|
| 1240 |
for (i = 0; i < limit; i++) { |
| 1241 |
int32_t val = read_s32(data, 4 + (i * 4)); |
| 1242 |
memcpy(data + 4 + (i * 4), &val, sizeof(val)); |
| 1243 |
} |
| 1244 |
|
| 1245 |
set_encodings(vs, (int32_t *)(data + 4), limit);
|
| 1246 |
break;
|
| 1247 |
case 3: |
| 1248 |
if (len == 1) |
| 1249 |
return 10; |
| 1250 |
|
| 1251 |
framebuffer_update_request(vs, |
| 1252 |
read_u8(data, 1), read_u16(data, 2), read_u16(data, 4), |
| 1253 |
read_u16(data, 6), read_u16(data, 8)); |
| 1254 |
break;
|
| 1255 |
case 4: |
| 1256 |
if (len == 1) |
| 1257 |
return 8; |
| 1258 |
|
| 1259 |
key_event(vs, read_u8(data, 1), read_u32(data, 4)); |
| 1260 |
break;
|
| 1261 |
case 5: |
| 1262 |
if (len == 1) |
| 1263 |
return 6; |
| 1264 |
|
| 1265 |
pointer_event(vs, read_u8(data, 1), read_u16(data, 2), read_u16(data, 4)); |
| 1266 |
break;
|
| 1267 |
case 6: |
| 1268 |
if (len == 1) |
| 1269 |
return 8; |
| 1270 |
|
| 1271 |
if (len == 8) { |
| 1272 |
uint32_t dlen = read_u32(data, 4);
|
| 1273 |
if (dlen > 0) |
| 1274 |
return 8 + dlen; |
| 1275 |
} |
| 1276 |
|
| 1277 |
client_cut_text(vs, read_u32(data, 4), data + 8); |
| 1278 |
break;
|
| 1279 |
case 255: |
| 1280 |
if (len == 1) |
| 1281 |
return 2; |
| 1282 |
|
| 1283 |
switch (read_u8(data, 1)) { |
| 1284 |
case 0: |
| 1285 |
if (len == 2) |
| 1286 |
return 12; |
| 1287 |
|
| 1288 |
ext_key_event(vs, read_u16(data, 2),
|
| 1289 |
read_u32(data, 4), read_u32(data, 8)); |
| 1290 |
break;
|
| 1291 |
default:
|
| 1292 |
printf("Msg: %d\n", read_u16(data, 0)); |
| 1293 |
vnc_client_error(vs); |
| 1294 |
break;
|
| 1295 |
} |
| 1296 |
break;
|
| 1297 |
default:
|
| 1298 |
printf("Msg: %d\n", data[0]); |
| 1299 |
vnc_client_error(vs); |
| 1300 |
break;
|
| 1301 |
} |
| 1302 |
|
| 1303 |
vnc_read_when(vs, protocol_client_msg, 1);
|
| 1304 |
return 0; |
| 1305 |
} |
| 1306 |
|
| 1307 |
static int protocol_client_init(VncState *vs, uint8_t *data, size_t len) |
| 1308 |
{
|
| 1309 |
char pad[3] = { 0, 0, 0 }; |
| 1310 |
char buf[1024]; |
| 1311 |
int size;
|
| 1312 |
|
| 1313 |
vs->width = vs->ds->width; |
| 1314 |
vs->height = vs->ds->height; |
| 1315 |
vnc_write_u16(vs, vs->ds->width); |
| 1316 |
vnc_write_u16(vs, vs->ds->height); |
| 1317 |
|
| 1318 |
vnc_write_u8(vs, vs->depth * 8); /* bits-per-pixel */ |
| 1319 |
vnc_write_u8(vs, vs->depth * 8); /* depth */ |
| 1320 |
#ifdef WORDS_BIGENDIAN
|
| 1321 |
vnc_write_u8(vs, 1); /* big-endian-flag */ |
| 1322 |
#else
|
| 1323 |
vnc_write_u8(vs, 0); /* big-endian-flag */ |
| 1324 |
#endif
|
| 1325 |
vnc_write_u8(vs, 1); /* true-color-flag */ |
| 1326 |
if (vs->depth == 4) { |
| 1327 |
vnc_write_u16(vs, 0xFF); /* red-max */ |
| 1328 |
vnc_write_u16(vs, 0xFF); /* green-max */ |
| 1329 |
vnc_write_u16(vs, 0xFF); /* blue-max */ |
| 1330 |
vnc_write_u8(vs, 16); /* red-shift */ |
| 1331 |
vnc_write_u8(vs, 8); /* green-shift */ |
| 1332 |
vnc_write_u8(vs, 0); /* blue-shift */ |
| 1333 |
vs->send_hextile_tile = send_hextile_tile_32; |
| 1334 |
} else if (vs->depth == 2) { |
| 1335 |
vnc_write_u16(vs, 31); /* red-max */ |
| 1336 |
vnc_write_u16(vs, 63); /* green-max */ |
| 1337 |
vnc_write_u16(vs, 31); /* blue-max */ |
| 1338 |
vnc_write_u8(vs, 11); /* red-shift */ |
| 1339 |
vnc_write_u8(vs, 5); /* green-shift */ |
| 1340 |
vnc_write_u8(vs, 0); /* blue-shift */ |
| 1341 |
vs->send_hextile_tile = send_hextile_tile_16; |
| 1342 |
} else if (vs->depth == 1) { |
| 1343 |
/* XXX: change QEMU pixel 8 bit pixel format to match the VNC one ? */
|
| 1344 |
vnc_write_u16(vs, 7); /* red-max */ |
| 1345 |
vnc_write_u16(vs, 7); /* green-max */ |
| 1346 |
vnc_write_u16(vs, 3); /* blue-max */ |
| 1347 |
vnc_write_u8(vs, 5); /* red-shift */ |
| 1348 |
vnc_write_u8(vs, 2); /* green-shift */ |
| 1349 |
vnc_write_u8(vs, 0); /* blue-shift */ |
| 1350 |
vs->send_hextile_tile = send_hextile_tile_8; |
| 1351 |
} |
| 1352 |
vs->write_pixels = vnc_write_pixels_copy; |
| 1353 |
|
| 1354 |
vnc_write(vs, pad, 3); /* padding */ |
| 1355 |
|
| 1356 |
if (qemu_name)
|
| 1357 |
size = snprintf(buf, sizeof(buf), "QEMU (%s)", qemu_name); |
| 1358 |
else
|
| 1359 |
size = snprintf(buf, sizeof(buf), "QEMU"); |
| 1360 |
|
| 1361 |
vnc_write_u32(vs, size); |
| 1362 |
vnc_write(vs, buf, size); |
| 1363 |
vnc_flush(vs); |
| 1364 |
|
| 1365 |
vnc_read_when(vs, protocol_client_msg, 1);
|
| 1366 |
|
| 1367 |
return 0; |
| 1368 |
} |
| 1369 |
|
| 1370 |
static void make_challenge(VncState *vs) |
| 1371 |
{
|
| 1372 |
int i;
|
| 1373 |
|
| 1374 |
srand(time(NULL)+getpid()+getpid()*987654+rand()); |
| 1375 |
|
| 1376 |
for (i = 0 ; i < sizeof(vs->challenge) ; i++) |
| 1377 |
vs->challenge[i] = (int) (256.0*rand()/(RAND_MAX+1.0)); |
| 1378 |
} |
| 1379 |
|
| 1380 |
static int protocol_client_auth_vnc(VncState *vs, uint8_t *data, size_t len) |
| 1381 |
{
|
| 1382 |
unsigned char response[VNC_AUTH_CHALLENGE_SIZE]; |
| 1383 |
int i, j, pwlen;
|
| 1384 |
unsigned char key[8]; |
| 1385 |
|
| 1386 |
if (!vs->password || !vs->password[0]) { |
| 1387 |
VNC_DEBUG("No password configured on server");
|
| 1388 |
vnc_write_u32(vs, 1); /* Reject auth */ |
| 1389 |
if (vs->minor >= 8) { |
| 1390 |
static const char err[] = "Authentication failed"; |
| 1391 |
vnc_write_u32(vs, sizeof(err));
|
| 1392 |
vnc_write(vs, err, sizeof(err));
|
| 1393 |
} |
| 1394 |
vnc_flush(vs); |
| 1395 |
vnc_client_error(vs); |
| 1396 |
return 0; |
| 1397 |
} |
| 1398 |
|
| 1399 |
memcpy(response, vs->challenge, VNC_AUTH_CHALLENGE_SIZE); |
| 1400 |
|
| 1401 |
/* Calculate the expected challenge response */
|
| 1402 |
pwlen = strlen(vs->password); |
| 1403 |
for (i=0; i<sizeof(key); i++) |
| 1404 |
key[i] = i<pwlen ? vs->password[i] : 0;
|
| 1405 |
deskey(key, EN0); |
| 1406 |
for (j = 0; j < VNC_AUTH_CHALLENGE_SIZE; j += 8) |
| 1407 |
des(response+j, response+j); |
| 1408 |
|
| 1409 |
/* Compare expected vs actual challenge response */
|
| 1410 |
if (memcmp(response, data, VNC_AUTH_CHALLENGE_SIZE) != 0) { |
| 1411 |
VNC_DEBUG("Client challenge reponse did not match\n");
|
| 1412 |
vnc_write_u32(vs, 1); /* Reject auth */ |
| 1413 |
if (vs->minor >= 8) { |
| 1414 |
static const char err[] = "Authentication failed"; |
| 1415 |
vnc_write_u32(vs, sizeof(err));
|
| 1416 |
vnc_write(vs, err, sizeof(err));
|
| 1417 |
} |
| 1418 |
vnc_flush(vs); |
| 1419 |
vnc_client_error(vs); |
| 1420 |
} else {
|
| 1421 |
VNC_DEBUG("Accepting VNC challenge response\n");
|
| 1422 |
vnc_write_u32(vs, 0); /* Accept auth */ |
| 1423 |
vnc_flush(vs); |
| 1424 |
|
| 1425 |
vnc_read_when(vs, protocol_client_init, 1);
|
| 1426 |
} |
| 1427 |
return 0; |
| 1428 |
} |
| 1429 |
|
| 1430 |
static int start_auth_vnc(VncState *vs) |
| 1431 |
{
|
| 1432 |
make_challenge(vs); |
| 1433 |
/* Send client a 'random' challenge */
|
| 1434 |
vnc_write(vs, vs->challenge, sizeof(vs->challenge));
|
| 1435 |
vnc_flush(vs); |
| 1436 |
|
| 1437 |
vnc_read_when(vs, protocol_client_auth_vnc, sizeof(vs->challenge));
|
| 1438 |
return 0; |
| 1439 |
} |
| 1440 |
|
| 1441 |
|
| 1442 |
#ifdef CONFIG_VNC_TLS
|
| 1443 |
#define DH_BITS 1024 |
| 1444 |
static gnutls_dh_params_t dh_params;
|
| 1445 |
|
| 1446 |
static int vnc_tls_initialize(void) |
| 1447 |
{
|
| 1448 |
static int tlsinitialized = 0; |
| 1449 |
|
| 1450 |
if (tlsinitialized)
|
| 1451 |
return 1; |
| 1452 |
|
| 1453 |
if (gnutls_global_init () < 0) |
| 1454 |
return 0; |
| 1455 |
|
| 1456 |
/* XXX ought to re-generate diffie-hellmen params periodically */
|
| 1457 |
if (gnutls_dh_params_init (&dh_params) < 0) |
| 1458 |
return 0; |
| 1459 |
if (gnutls_dh_params_generate2 (dh_params, DH_BITS) < 0) |
| 1460 |
return 0; |
| 1461 |
|
| 1462 |
#if _VNC_DEBUG == 2 |
| 1463 |
gnutls_global_set_log_level(10);
|
| 1464 |
gnutls_global_set_log_function(vnc_debug_gnutls_log); |
| 1465 |
#endif
|
| 1466 |
|
| 1467 |
tlsinitialized = 1;
|
| 1468 |
|
| 1469 |
return 1; |
| 1470 |
} |
| 1471 |
|
| 1472 |
static gnutls_anon_server_credentials vnc_tls_initialize_anon_cred(void) |
| 1473 |
{
|
| 1474 |
gnutls_anon_server_credentials anon_cred; |
| 1475 |
int ret;
|
| 1476 |
|
| 1477 |
if ((ret = gnutls_anon_allocate_server_credentials(&anon_cred)) < 0) { |
| 1478 |
VNC_DEBUG("Cannot allocate credentials %s\n", gnutls_strerror(ret));
|
| 1479 |
return NULL; |
| 1480 |
} |
| 1481 |
|
| 1482 |
gnutls_anon_set_server_dh_params(anon_cred, dh_params); |
| 1483 |
|
| 1484 |
return anon_cred;
|
| 1485 |
} |
| 1486 |
|
| 1487 |
|
| 1488 |
static gnutls_certificate_credentials_t vnc_tls_initialize_x509_cred(VncState *vs)
|
| 1489 |
{
|
| 1490 |
gnutls_certificate_credentials_t x509_cred; |
| 1491 |
int ret;
|
| 1492 |
|
| 1493 |
if (!vs->x509cacert) {
|
| 1494 |
VNC_DEBUG("No CA x509 certificate specified\n");
|
| 1495 |
return NULL; |
| 1496 |
} |
| 1497 |
if (!vs->x509cert) {
|
| 1498 |
VNC_DEBUG("No server x509 certificate specified\n");
|
| 1499 |
return NULL; |
| 1500 |
} |
| 1501 |
if (!vs->x509key) {
|
| 1502 |
VNC_DEBUG("No server private key specified\n");
|
| 1503 |
return NULL; |
| 1504 |
} |
| 1505 |
|
| 1506 |
if ((ret = gnutls_certificate_allocate_credentials(&x509_cred)) < 0) { |
| 1507 |
VNC_DEBUG("Cannot allocate credentials %s\n", gnutls_strerror(ret));
|
| 1508 |
return NULL; |
| 1509 |
} |
| 1510 |
if ((ret = gnutls_certificate_set_x509_trust_file(x509_cred,
|
| 1511 |
vs->x509cacert, |
| 1512 |
GNUTLS_X509_FMT_PEM)) < 0) {
|
| 1513 |
VNC_DEBUG("Cannot load CA certificate %s\n", gnutls_strerror(ret));
|
| 1514 |
gnutls_certificate_free_credentials(x509_cred); |
| 1515 |
return NULL; |
| 1516 |
} |
| 1517 |
|
| 1518 |
if ((ret = gnutls_certificate_set_x509_key_file (x509_cred,
|
| 1519 |
vs->x509cert, |
| 1520 |
vs->x509key, |
| 1521 |
GNUTLS_X509_FMT_PEM)) < 0) {
|
| 1522 |
VNC_DEBUG("Cannot load certificate & key %s\n", gnutls_strerror(ret));
|
| 1523 |
gnutls_certificate_free_credentials(x509_cred); |
| 1524 |
return NULL; |
| 1525 |
} |
| 1526 |
|
| 1527 |
if (vs->x509cacrl) {
|
| 1528 |
if ((ret = gnutls_certificate_set_x509_crl_file(x509_cred,
|
| 1529 |
vs->x509cacrl, |
| 1530 |
GNUTLS_X509_FMT_PEM)) < 0) {
|
| 1531 |
VNC_DEBUG("Cannot load CRL %s\n", gnutls_strerror(ret));
|
| 1532 |
gnutls_certificate_free_credentials(x509_cred); |
| 1533 |
return NULL; |
| 1534 |
} |
| 1535 |
} |
| 1536 |
|
| 1537 |
gnutls_certificate_set_dh_params (x509_cred, dh_params); |
| 1538 |
|
| 1539 |
return x509_cred;
|
| 1540 |
} |
| 1541 |
|
| 1542 |
static int vnc_validate_certificate(struct VncState *vs) |
| 1543 |
{
|
| 1544 |
int ret;
|
| 1545 |
unsigned int status; |
| 1546 |
const gnutls_datum_t *certs;
|
| 1547 |
unsigned int nCerts, i; |
| 1548 |
time_t now; |
| 1549 |
|
| 1550 |
VNC_DEBUG("Validating client certificate\n");
|
| 1551 |
if ((ret = gnutls_certificate_verify_peers2 (vs->tls_session, &status)) < 0) { |
| 1552 |
VNC_DEBUG("Verify failed %s\n", gnutls_strerror(ret));
|
| 1553 |
return -1; |
| 1554 |
} |
| 1555 |
|
| 1556 |
if ((now = time(NULL)) == ((time_t)-1)) { |
| 1557 |
return -1; |
| 1558 |
} |
| 1559 |
|
| 1560 |
if (status != 0) { |
| 1561 |
if (status & GNUTLS_CERT_INVALID)
|
| 1562 |
VNC_DEBUG("The certificate is not trusted.\n");
|
| 1563 |
|
| 1564 |
if (status & GNUTLS_CERT_SIGNER_NOT_FOUND)
|
| 1565 |
VNC_DEBUG("The certificate hasn't got a known issuer.\n");
|
| 1566 |
|
| 1567 |
if (status & GNUTLS_CERT_REVOKED)
|
| 1568 |
VNC_DEBUG("The certificate has been revoked.\n");
|
| 1569 |
|
| 1570 |
if (status & GNUTLS_CERT_INSECURE_ALGORITHM)
|
| 1571 |
VNC_DEBUG("The certificate uses an insecure algorithm\n");
|
| 1572 |
|
| 1573 |
return -1; |
| 1574 |
} else {
|
| 1575 |
VNC_DEBUG("Certificate is valid!\n");
|
| 1576 |
} |
| 1577 |
|
| 1578 |
/* Only support x509 for now */
|
| 1579 |
if (gnutls_certificate_type_get(vs->tls_session) != GNUTLS_CRT_X509)
|
| 1580 |
return -1; |
| 1581 |
|
| 1582 |
if (!(certs = gnutls_certificate_get_peers(vs->tls_session, &nCerts)))
|
| 1583 |
return -1; |
| 1584 |
|
| 1585 |
for (i = 0 ; i < nCerts ; i++) { |
| 1586 |
gnutls_x509_crt_t cert; |
| 1587 |
VNC_DEBUG ("Checking certificate chain %d\n", i);
|
| 1588 |
if (gnutls_x509_crt_init (&cert) < 0) |
| 1589 |
return -1; |
| 1590 |
|
| 1591 |
if (gnutls_x509_crt_import(cert, &certs[i], GNUTLS_X509_FMT_DER) < 0) { |
| 1592 |
gnutls_x509_crt_deinit (cert); |
| 1593 |
return -1; |
| 1594 |
} |
| 1595 |
|
| 1596 |
if (gnutls_x509_crt_get_expiration_time (cert) < now) {
|
| 1597 |
VNC_DEBUG("The certificate has expired\n");
|
| 1598 |
gnutls_x509_crt_deinit (cert); |
| 1599 |
return -1; |
| 1600 |
} |
| 1601 |
|
| 1602 |
if (gnutls_x509_crt_get_activation_time (cert) > now) {
|
| 1603 |
VNC_DEBUG("The certificate is not yet activated\n");
|
| 1604 |
gnutls_x509_crt_deinit (cert); |
| 1605 |
return -1; |
| 1606 |
} |
| 1607 |
|
| 1608 |
if (gnutls_x509_crt_get_activation_time (cert) > now) {
|
| 1609 |
VNC_DEBUG("The certificate is not yet activated\n");
|
| 1610 |
gnutls_x509_crt_deinit (cert); |
| 1611 |
return -1; |
| 1612 |
} |
| 1613 |
|
| 1614 |
gnutls_x509_crt_deinit (cert); |
| 1615 |
} |
| 1616 |
|
| 1617 |
return 0; |
| 1618 |
} |
| 1619 |
|
| 1620 |
|
| 1621 |
static int start_auth_vencrypt_subauth(VncState *vs) |
| 1622 |
{
|
| 1623 |
switch (vs->subauth) {
|
| 1624 |
case VNC_AUTH_VENCRYPT_TLSNONE:
|
| 1625 |
case VNC_AUTH_VENCRYPT_X509NONE:
|
| 1626 |
VNC_DEBUG("Accept TLS auth none\n");
|
| 1627 |
vnc_write_u32(vs, 0); /* Accept auth completion */ |
| 1628 |
vnc_read_when(vs, protocol_client_init, 1);
|
| 1629 |
break;
|
| 1630 |
|
| 1631 |
case VNC_AUTH_VENCRYPT_TLSVNC:
|
| 1632 |
case VNC_AUTH_VENCRYPT_X509VNC:
|
| 1633 |
VNC_DEBUG("Start TLS auth VNC\n");
|
| 1634 |
return start_auth_vnc(vs);
|
| 1635 |
|
| 1636 |
default: /* Should not be possible, but just in case */ |
| 1637 |
VNC_DEBUG("Reject auth %d\n", vs->auth);
|
| 1638 |
vnc_write_u8(vs, 1);
|
| 1639 |
if (vs->minor >= 8) { |
| 1640 |
static const char err[] = "Unsupported authentication type"; |
| 1641 |
vnc_write_u32(vs, sizeof(err));
|
| 1642 |
vnc_write(vs, err, sizeof(err));
|
| 1643 |
} |
| 1644 |
vnc_client_error(vs); |
| 1645 |
} |
| 1646 |
|
| 1647 |
return 0; |
| 1648 |
} |
| 1649 |
|
| 1650 |
static void vnc_handshake_io(void *opaque); |
| 1651 |
|
| 1652 |
static int vnc_continue_handshake(struct VncState *vs) { |
| 1653 |
int ret;
|
| 1654 |
|
| 1655 |
if ((ret = gnutls_handshake(vs->tls_session)) < 0) { |
| 1656 |
if (!gnutls_error_is_fatal(ret)) {
|
| 1657 |
VNC_DEBUG("Handshake interrupted (blocking)\n");
|
| 1658 |
if (!gnutls_record_get_direction(vs->tls_session))
|
| 1659 |
qemu_set_fd_handler(vs->csock, vnc_handshake_io, NULL, vs);
|
| 1660 |
else
|
| 1661 |
qemu_set_fd_handler(vs->csock, NULL, vnc_handshake_io, vs);
|
| 1662 |
return 0; |
| 1663 |
} |
| 1664 |
VNC_DEBUG("Handshake failed %s\n", gnutls_strerror(ret));
|
| 1665 |
vnc_client_error(vs); |
| 1666 |
return -1; |
| 1667 |
} |
| 1668 |
|
| 1669 |
if (vs->x509verify) {
|
| 1670 |
if (vnc_validate_certificate(vs) < 0) { |
| 1671 |
VNC_DEBUG("Client verification failed\n");
|
| 1672 |
vnc_client_error(vs); |
| 1673 |
return -1; |
| 1674 |
} else {
|
| 1675 |
VNC_DEBUG("Client verification passed\n");
|
| 1676 |
} |
| 1677 |
} |
| 1678 |
|
| 1679 |
VNC_DEBUG("Handshake done, switching to TLS data mode\n");
|
| 1680 |
vs->wiremode = VNC_WIREMODE_TLS; |
| 1681 |
qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, vnc_client_write, vs);
|
| 1682 |
|
| 1683 |
return start_auth_vencrypt_subauth(vs);
|
| 1684 |
} |
| 1685 |
|
| 1686 |
static void vnc_handshake_io(void *opaque) { |
| 1687 |
struct VncState *vs = (struct VncState *)opaque; |
| 1688 |
|
| 1689 |
VNC_DEBUG("Handshake IO continue\n");
|
| 1690 |
vnc_continue_handshake(vs); |
| 1691 |
} |
| 1692 |
|
| 1693 |
#define NEED_X509_AUTH(vs) \
|
| 1694 |
((vs)->subauth == VNC_AUTH_VENCRYPT_X509NONE || \ |
| 1695 |
(vs)->subauth == VNC_AUTH_VENCRYPT_X509VNC || \ |
| 1696 |
(vs)->subauth == VNC_AUTH_VENCRYPT_X509PLAIN) |
| 1697 |
|
| 1698 |
|
| 1699 |
static int vnc_start_tls(struct VncState *vs) { |
| 1700 |
static const int cert_type_priority[] = { GNUTLS_CRT_X509, 0 }; |
| 1701 |
static const int protocol_priority[]= { GNUTLS_TLS1_1, GNUTLS_TLS1_0, GNUTLS_SSL3, 0 }; |
| 1702 |
static const int kx_anon[] = {GNUTLS_KX_ANON_DH, 0}; |
| 1703 |
static const int kx_x509[] = {GNUTLS_KX_DHE_DSS, GNUTLS_KX_RSA, GNUTLS_KX_DHE_RSA, GNUTLS_KX_SRP, 0}; |
| 1704 |
|
| 1705 |
VNC_DEBUG("Do TLS setup\n");
|
| 1706 |
if (vnc_tls_initialize() < 0) { |
| 1707 |
VNC_DEBUG("Failed to init TLS\n");
|
| 1708 |
vnc_client_error(vs); |
| 1709 |
return -1; |
| 1710 |
} |
| 1711 |
if (vs->tls_session == NULL) { |
| 1712 |
if (gnutls_init(&vs->tls_session, GNUTLS_SERVER) < 0) { |
| 1713 |
vnc_client_error(vs); |
| 1714 |
return -1; |
| 1715 |
} |
| 1716 |
|
| 1717 |
if (gnutls_set_default_priority(vs->tls_session) < 0) { |
| 1718 |
gnutls_deinit(vs->tls_session); |
| 1719 |
vs->tls_session = NULL;
|
| 1720 |
vnc_client_error(vs); |
| 1721 |
return -1; |
| 1722 |
} |
| 1723 |
|
| 1724 |
if (gnutls_kx_set_priority(vs->tls_session, NEED_X509_AUTH(vs) ? kx_x509 : kx_anon) < 0) { |
| 1725 |
gnutls_deinit(vs->tls_session); |
| 1726 |
vs->tls_session = NULL;
|
| 1727 |
vnc_client_error(vs); |
| 1728 |
return -1; |
| 1729 |
} |
| 1730 |
|
| 1731 |
if (gnutls_certificate_type_set_priority(vs->tls_session, cert_type_priority) < 0) { |
| 1732 |
gnutls_deinit(vs->tls_session); |
| 1733 |
vs->tls_session = NULL;
|
| 1734 |
vnc_client_error(vs); |
| 1735 |
return -1; |
| 1736 |
} |
| 1737 |
|
| 1738 |
if (gnutls_protocol_set_priority(vs->tls_session, protocol_priority) < 0) { |
| 1739 |
gnutls_deinit(vs->tls_session); |
| 1740 |
vs->tls_session = NULL;
|
| 1741 |
vnc_client_error(vs); |
| 1742 |
return -1; |
| 1743 |
} |
| 1744 |
|
| 1745 |
if (NEED_X509_AUTH(vs)) {
|
| 1746 |
gnutls_certificate_server_credentials x509_cred = vnc_tls_initialize_x509_cred(vs); |
| 1747 |
if (!x509_cred) {
|
| 1748 |
gnutls_deinit(vs->tls_session); |
| 1749 |
vs->tls_session = NULL;
|
| 1750 |
vnc_client_error(vs); |
| 1751 |
return -1; |
| 1752 |
} |
| 1753 |
if (gnutls_credentials_set(vs->tls_session, GNUTLS_CRD_CERTIFICATE, x509_cred) < 0) { |
| 1754 |
gnutls_deinit(vs->tls_session); |
| 1755 |
vs->tls_session = NULL;
|
| 1756 |
gnutls_certificate_free_credentials(x509_cred); |
| 1757 |
vnc_client_error(vs); |
| 1758 |
return -1; |
| 1759 |
} |
| 1760 |
if (vs->x509verify) {
|
| 1761 |
VNC_DEBUG("Requesting a client certificate\n");
|
| 1762 |
gnutls_certificate_server_set_request (vs->tls_session, GNUTLS_CERT_REQUEST); |
| 1763 |
} |
| 1764 |
|
| 1765 |
} else {
|
| 1766 |
gnutls_anon_server_credentials anon_cred = vnc_tls_initialize_anon_cred(); |
| 1767 |
if (!anon_cred) {
|
| 1768 |
gnutls_deinit(vs->tls_session); |
| 1769 |
vs->tls_session = NULL;
|
| 1770 |
vnc_client_error(vs); |
| 1771 |
return -1; |
| 1772 |
} |
| 1773 |
if (gnutls_credentials_set(vs->tls_session, GNUTLS_CRD_ANON, anon_cred) < 0) { |
| 1774 |
gnutls_deinit(vs->tls_session); |
| 1775 |
vs->tls_session = NULL;
|
| 1776 |
gnutls_anon_free_server_credentials(anon_cred); |
| 1777 |
vnc_client_error(vs); |
| 1778 |
return -1; |
| 1779 |
} |
| 1780 |
} |
| 1781 |
|
| 1782 |
gnutls_transport_set_ptr(vs->tls_session, (gnutls_transport_ptr_t)vs); |
| 1783 |
gnutls_transport_set_push_function(vs->tls_session, vnc_tls_push); |
| 1784 |
gnutls_transport_set_pull_function(vs->tls_session, vnc_tls_pull); |
| 1785 |
} |
| 1786 |
|
| 1787 |
VNC_DEBUG("Start TLS handshake process\n");
|
| 1788 |
return vnc_continue_handshake(vs);
|
| 1789 |
} |
| 1790 |
|
| 1791 |
static int protocol_client_vencrypt_auth(VncState *vs, uint8_t *data, size_t len) |
| 1792 |
{
|
| 1793 |
int auth = read_u32(data, 0); |
| 1794 |
|
| 1795 |
if (auth != vs->subauth) {
|
| 1796 |
VNC_DEBUG("Rejecting auth %d\n", auth);
|
| 1797 |
vnc_write_u8(vs, 0); /* Reject auth */ |
| 1798 |
vnc_flush(vs); |
| 1799 |
vnc_client_error(vs); |
| 1800 |
} else {
|
| 1801 |
VNC_DEBUG("Accepting auth %d, starting handshake\n", auth);
|
| 1802 |
vnc_write_u8(vs, 1); /* Accept auth */ |
| 1803 |
vnc_flush(vs); |
| 1804 |
|
| 1805 |
if (vnc_start_tls(vs) < 0) { |
| 1806 |
VNC_DEBUG("Failed to complete TLS\n");
|
| 1807 |
return 0; |
| 1808 |
} |
| 1809 |
|
| 1810 |
if (vs->wiremode == VNC_WIREMODE_TLS) {
|
| 1811 |
VNC_DEBUG("Starting VeNCrypt subauth\n");
|
| 1812 |
return start_auth_vencrypt_subauth(vs);
|
| 1813 |
} else {
|
| 1814 |
VNC_DEBUG("TLS handshake blocked\n");
|
| 1815 |
return 0; |
| 1816 |
} |
| 1817 |
} |
| 1818 |
return 0; |
| 1819 |
} |
| 1820 |
|
| 1821 |
static int protocol_client_vencrypt_init(VncState *vs, uint8_t *data, size_t len) |
| 1822 |
{
|
| 1823 |
if (data[0] != 0 || |
| 1824 |
data[1] != 2) { |
| 1825 |
VNC_DEBUG("Unsupported VeNCrypt protocol %d.%d\n", (int)data[0], (int)data[1]); |
| 1826 |
vnc_write_u8(vs, 1); /* Reject version */ |
| 1827 |
vnc_flush(vs); |
| 1828 |
vnc_client_error(vs); |
| 1829 |
} else {
|
| 1830 |
VNC_DEBUG("Sending allowed auth %d\n", vs->subauth);
|
| 1831 |
vnc_write_u8(vs, 0); /* Accept version */ |
| 1832 |
vnc_write_u8(vs, 1); /* Number of sub-auths */ |
| 1833 |
vnc_write_u32(vs, vs->subauth); /* The supported auth */
|
| 1834 |
vnc_flush(vs); |
| 1835 |
vnc_read_when(vs, protocol_client_vencrypt_auth, 4);
|
| 1836 |
} |
| 1837 |
return 0; |
| 1838 |
} |
| 1839 |
|
| 1840 |
static int start_auth_vencrypt(VncState *vs) |
| 1841 |
{
|
| 1842 |
/* Send VeNCrypt version 0.2 */
|
| 1843 |
vnc_write_u8(vs, 0);
|
| 1844 |
vnc_write_u8(vs, 2);
|
| 1845 |
|
| 1846 |
vnc_read_when(vs, protocol_client_vencrypt_init, 2);
|
| 1847 |
return 0; |
| 1848 |
} |
| 1849 |
#endif /* CONFIG_VNC_TLS */ |
| 1850 |
|
| 1851 |
static int protocol_client_auth(VncState *vs, uint8_t *data, size_t len) |
| 1852 |
{
|
| 1853 |
/* We only advertise 1 auth scheme at a time, so client
|
| 1854 |
* must pick the one we sent. Verify this */
|
| 1855 |
if (data[0] != vs->auth) { /* Reject auth */ |
| 1856 |
VNC_DEBUG("Reject auth %d\n", (int)data[0]); |
| 1857 |
vnc_write_u32(vs, 1);
|
| 1858 |
if (vs->minor >= 8) { |
| 1859 |
static const char err[] = "Authentication failed"; |
| 1860 |
vnc_write_u32(vs, sizeof(err));
|
| 1861 |
vnc_write(vs, err, sizeof(err));
|
| 1862 |
} |
| 1863 |
vnc_client_error(vs); |
| 1864 |
} else { /* Accept requested auth */ |
| 1865 |
VNC_DEBUG("Client requested auth %d\n", (int)data[0]); |
| 1866 |
switch (vs->auth) {
|
| 1867 |
case VNC_AUTH_NONE:
|
| 1868 |
VNC_DEBUG("Accept auth none\n");
|
| 1869 |
if (vs->minor >= 8) { |
| 1870 |
vnc_write_u32(vs, 0); /* Accept auth completion */ |
| 1871 |
vnc_flush(vs); |
| 1872 |
} |
| 1873 |
vnc_read_when(vs, protocol_client_init, 1);
|
| 1874 |
break;
|
| 1875 |
|
| 1876 |
case VNC_AUTH_VNC:
|
| 1877 |
VNC_DEBUG("Start VNC auth\n");
|
| 1878 |
return start_auth_vnc(vs);
|
| 1879 |
|
| 1880 |
#ifdef CONFIG_VNC_TLS
|
| 1881 |
case VNC_AUTH_VENCRYPT:
|
| 1882 |
VNC_DEBUG("Accept VeNCrypt auth\n");;
|
| 1883 |
return start_auth_vencrypt(vs);
|
| 1884 |
#endif /* CONFIG_VNC_TLS */ |
| 1885 |
|
| 1886 |
default: /* Should not be possible, but just in case */ |
| 1887 |
VNC_DEBUG("Reject auth %d\n", vs->auth);
|
| 1888 |
vnc_write_u8(vs, 1);
|
| 1889 |
if (vs->minor >= 8) { |
| 1890 |
static const char err[] = "Authentication failed"; |
| 1891 |
vnc_write_u32(vs, sizeof(err));
|
| 1892 |
vnc_write(vs, err, sizeof(err));
|
| 1893 |
} |
| 1894 |
vnc_client_error(vs); |
| 1895 |
} |
| 1896 |
} |
| 1897 |
return 0; |
| 1898 |
} |
| 1899 |
|
| 1900 |
static int protocol_version(VncState *vs, uint8_t *version, size_t len) |
| 1901 |
{
|
| 1902 |
char local[13]; |
| 1903 |
|
| 1904 |
memcpy(local, version, 12);
|
| 1905 |
local[12] = 0; |
| 1906 |
|
| 1907 |
if (sscanf(local, "RFB %03d.%03d\n", &vs->major, &vs->minor) != 2) { |
| 1908 |
VNC_DEBUG("Malformed protocol version %s\n", local);
|
| 1909 |
vnc_client_error(vs); |
| 1910 |
return 0; |
| 1911 |
} |
| 1912 |
VNC_DEBUG("Client request protocol version %d.%d\n", vs->major, vs->minor);
|
| 1913 |
if (vs->major != 3 || |
| 1914 |
(vs->minor != 3 &&
|
| 1915 |
vs->minor != 4 &&
|
| 1916 |
vs->minor != 5 &&
|
| 1917 |
vs->minor != 7 &&
|
| 1918 |
vs->minor != 8)) {
|
| 1919 |
VNC_DEBUG("Unsupported client version\n");
|
| 1920 |
vnc_write_u32(vs, VNC_AUTH_INVALID); |
| 1921 |
vnc_flush(vs); |
| 1922 |
vnc_client_error(vs); |
| 1923 |
return 0; |
| 1924 |
} |
| 1925 |
/* Some broken clients report v3.4 or v3.5, which spec requires to be treated
|
| 1926 |
* as equivalent to v3.3 by servers
|
| 1927 |
*/
|
| 1928 |
if (vs->minor == 4 || vs->minor == 5) |
| 1929 |
vs->minor = 3;
|
| 1930 |
|
| 1931 |
if (vs->minor == 3) { |
| 1932 |
if (vs->auth == VNC_AUTH_NONE) {
|
| 1933 |
VNC_DEBUG("Tell client auth none\n");
|
| 1934 |
vnc_write_u32(vs, vs->auth); |
| 1935 |
vnc_flush(vs); |
| 1936 |
vnc_read_when(vs, protocol_client_init, 1);
|
| 1937 |
} else if (vs->auth == VNC_AUTH_VNC) { |
| 1938 |
VNC_DEBUG("Tell client VNC auth\n");
|
| 1939 |
vnc_write_u32(vs, vs->auth); |
| 1940 |
vnc_flush(vs); |
| 1941 |
start_auth_vnc(vs); |
| 1942 |
} else {
|
| 1943 |
VNC_DEBUG("Unsupported auth %d for protocol 3.3\n", vs->auth);
|
| 1944 |
vnc_write_u32(vs, VNC_AUTH_INVALID); |
| 1945 |
vnc_flush(vs); |
| 1946 |
vnc_client_error(vs); |
| 1947 |
} |
| 1948 |
} else {
|
| 1949 |
VNC_DEBUG("Telling client we support auth %d\n", vs->auth);
|
| 1950 |
vnc_write_u8(vs, 1); /* num auth */ |
| 1951 |
vnc_write_u8(vs, vs->auth); |
| 1952 |
vnc_read_when(vs, protocol_client_auth, 1);
|
| 1953 |
vnc_flush(vs); |
| 1954 |
} |
| 1955 |
|
| 1956 |
return 0; |
| 1957 |
} |
| 1958 |
|
| 1959 |
static void vnc_connect(VncState *vs) |
| 1960 |
{
|
| 1961 |
VNC_DEBUG("New client on socket %d\n", vs->csock);
|
| 1962 |
vs->ds->idle = 0;
|
| 1963 |
socket_set_nonblock(vs->csock); |
| 1964 |
qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs); |
| 1965 |
vnc_write(vs, "RFB 003.008\n", 12); |
| 1966 |
vnc_flush(vs); |
| 1967 |
vnc_read_when(vs, protocol_version, 12);
|
| 1968 |
memset(vs->old_data, 0, vs->ds->linesize * vs->ds->height);
|
| 1969 |
memset(vs->dirty_row, 0xFF, sizeof(vs->dirty_row)); |
| 1970 |
vs->has_resize = 0;
|
| 1971 |
vs->has_hextile = 0;
|
| 1972 |
vs->ds->dpy_copy = NULL;
|
| 1973 |
vnc_update_client(vs); |
| 1974 |
} |
| 1975 |
|
| 1976 |
static void vnc_listen_read(void *opaque) |
| 1977 |
{
|
| 1978 |
VncState *vs = opaque; |
| 1979 |
struct sockaddr_in addr;
|
| 1980 |
socklen_t addrlen = sizeof(addr);
|
| 1981 |
|
| 1982 |
/* Catch-up */
|
| 1983 |
vga_hw_update(); |
| 1984 |
|
| 1985 |
vs->csock = accept(vs->lsock, (struct sockaddr *)&addr, &addrlen);
|
| 1986 |
if (vs->csock != -1) { |
| 1987 |
vnc_connect(vs); |
| 1988 |
} |
| 1989 |
} |
| 1990 |
|
| 1991 |
extern int parse_host_port(struct sockaddr_in *saddr, const char *str); |
| 1992 |
|
| 1993 |
void vnc_display_init(DisplayState *ds)
|
| 1994 |
{
|
| 1995 |
VncState *vs; |
| 1996 |
|
| 1997 |
vs = qemu_mallocz(sizeof(VncState));
|
| 1998 |
if (!vs)
|
| 1999 |
exit(1);
|
| 2000 |
|
| 2001 |
ds->opaque = vs; |
| 2002 |
ds->idle = 1;
|
| 2003 |
vnc_state = vs; |
| 2004 |
vs->display = NULL;
|
| 2005 |
vs->password = NULL;
|
| 2006 |
|
| 2007 |
vs->lsock = -1;
|
| 2008 |
vs->csock = -1;
|
| 2009 |
vs->depth = 4;
|
| 2010 |
vs->last_x = -1;
|
| 2011 |
vs->last_y = -1;
|
| 2012 |
|
| 2013 |
vs->ds = ds; |
| 2014 |
|
| 2015 |
if (keyboard_layout)
|
| 2016 |
vs->kbd_layout = init_keyboard_layout(keyboard_layout); |
| 2017 |
else
|
| 2018 |
vs->kbd_layout = init_keyboard_layout("en-us");
|
| 2019 |
|
| 2020 |
if (!vs->kbd_layout)
|
| 2021 |
exit(1);
|
| 2022 |
|
| 2023 |
vs->timer = qemu_new_timer(rt_clock, vnc_update_client, vs); |
| 2024 |
|
| 2025 |
vs->ds->data = NULL;
|
| 2026 |
vs->ds->dpy_update = vnc_dpy_update; |
| 2027 |
vs->ds->dpy_resize = vnc_dpy_resize; |
| 2028 |
vs->ds->dpy_refresh = NULL;
|
| 2029 |
|
| 2030 |
vnc_dpy_resize(vs->ds, 640, 400); |
| 2031 |
} |
| 2032 |
|
| 2033 |
#ifdef CONFIG_VNC_TLS
|
| 2034 |
static int vnc_set_x509_credential(VncState *vs, |
| 2035 |
const char *certdir, |
| 2036 |
const char *filename, |
| 2037 |
char **cred,
|
| 2038 |
int ignoreMissing)
|
| 2039 |
{
|
| 2040 |
struct stat sb;
|
| 2041 |
|
| 2042 |
if (*cred) {
|
| 2043 |
qemu_free(*cred); |
| 2044 |
*cred = NULL;
|
| 2045 |
} |
| 2046 |
|
| 2047 |
if (!(*cred = qemu_malloc(strlen(certdir) + strlen(filename) + 2))) |
| 2048 |
return -1; |
| 2049 |
|
| 2050 |
strcpy(*cred, certdir); |
| 2051 |
strcat(*cred, "/");
|
| 2052 |
strcat(*cred, filename); |
| 2053 |
|
| 2054 |
VNC_DEBUG("Check %s\n", *cred);
|
| 2055 |
if (stat(*cred, &sb) < 0) { |
| 2056 |
qemu_free(*cred); |
| 2057 |
*cred = NULL;
|
| 2058 |
if (ignoreMissing && errno == ENOENT)
|
| 2059 |
return 0; |
| 2060 |
return -1; |
| 2061 |
} |
| 2062 |
|
| 2063 |
return 0; |
| 2064 |
} |
| 2065 |
|
| 2066 |
static int vnc_set_x509_credential_dir(VncState *vs, |
| 2067 |
const char *certdir) |
| 2068 |
{
|
| 2069 |
if (vnc_set_x509_credential(vs, certdir, X509_CA_CERT_FILE, &vs->x509cacert, 0) < 0) |
| 2070 |
goto cleanup;
|
| 2071 |
if (vnc_set_x509_credential(vs, certdir, X509_CA_CRL_FILE, &vs->x509cacrl, 1) < 0) |
| 2072 |
goto cleanup;
|
| 2073 |
if (vnc_set_x509_credential(vs, certdir, X509_SERVER_CERT_FILE, &vs->x509cert, 0) < 0) |
| 2074 |
goto cleanup;
|
| 2075 |
if (vnc_set_x509_credential(vs, certdir, X509_SERVER_KEY_FILE, &vs->x509key, 0) < 0) |
| 2076 |
goto cleanup;
|
| 2077 |
|
| 2078 |
return 0; |
| 2079 |
|
| 2080 |
cleanup:
|
| 2081 |
qemu_free(vs->x509cacert); |
| 2082 |
qemu_free(vs->x509cacrl); |
| 2083 |
qemu_free(vs->x509cert); |
| 2084 |
qemu_free(vs->x509key); |
| 2085 |
vs->x509cacert = vs->x509cacrl = vs->x509cert = vs->x509key = NULL;
|
| 2086 |
return -1; |
| 2087 |
} |
| 2088 |
#endif /* CONFIG_VNC_TLS */ |
| 2089 |
|
| 2090 |
void vnc_display_close(DisplayState *ds)
|
| 2091 |
{
|
| 2092 |
VncState *vs = ds ? (VncState *)ds->opaque : vnc_state; |
| 2093 |
|
| 2094 |
if (vs->display) {
|
| 2095 |
qemu_free(vs->display); |
| 2096 |
vs->display = NULL;
|
| 2097 |
} |
| 2098 |
if (vs->lsock != -1) { |
| 2099 |
qemu_set_fd_handler2(vs->lsock, NULL, NULL, NULL, NULL); |
| 2100 |
close(vs->lsock); |
| 2101 |
vs->lsock = -1;
|
| 2102 |
} |
| 2103 |
if (vs->csock != -1) { |
| 2104 |
qemu_set_fd_handler2(vs->csock, NULL, NULL, NULL, NULL); |
| 2105 |
closesocket(vs->csock); |
| 2106 |
vs->csock = -1;
|
| 2107 |
buffer_reset(&vs->input); |
| 2108 |
buffer_reset(&vs->output); |
| 2109 |
vs->need_update = 0;
|
| 2110 |
#ifdef CONFIG_VNC_TLS
|
| 2111 |
if (vs->tls_session) {
|
| 2112 |
gnutls_deinit(vs->tls_session); |
| 2113 |
vs->tls_session = NULL;
|
| 2114 |
} |
| 2115 |
vs->wiremode = VNC_WIREMODE_CLEAR; |
| 2116 |
#endif /* CONFIG_VNC_TLS */ |
| 2117 |
} |
| 2118 |
vs->auth = VNC_AUTH_INVALID; |
| 2119 |
#ifdef CONFIG_VNC_TLS
|
| 2120 |
vs->subauth = VNC_AUTH_INVALID; |
| 2121 |
vs->x509verify = 0;
|
| 2122 |
#endif
|
| 2123 |
} |
| 2124 |
|
| 2125 |
int vnc_display_password(DisplayState *ds, const char *password) |
| 2126 |
{
|
| 2127 |
VncState *vs = ds ? (VncState *)ds->opaque : vnc_state; |
| 2128 |
|
| 2129 |
if (vs->password) {
|
| 2130 |
qemu_free(vs->password); |
| 2131 |
vs->password = NULL;
|
| 2132 |
} |
| 2133 |
if (password && password[0]) { |
| 2134 |
if (!(vs->password = qemu_strdup(password)))
|
| 2135 |
return -1; |
| 2136 |
} |
| 2137 |
|
| 2138 |
return 0; |
| 2139 |
} |
| 2140 |
|
| 2141 |
int vnc_display_open(DisplayState *ds, const char *display) |
| 2142 |
{
|
| 2143 |
struct sockaddr *addr;
|
| 2144 |
struct sockaddr_in iaddr;
|
| 2145 |
#ifndef _WIN32
|
| 2146 |
struct sockaddr_un uaddr;
|
| 2147 |
const char *p; |
| 2148 |
#endif
|
| 2149 |
int reuse_addr, ret;
|
| 2150 |
socklen_t addrlen; |
| 2151 |
VncState *vs = ds ? (VncState *)ds->opaque : vnc_state; |
| 2152 |
const char *options; |
| 2153 |
int password = 0; |
| 2154 |
int reverse = 0; |
| 2155 |
#ifdef CONFIG_VNC_TLS
|
| 2156 |
int tls = 0, x509 = 0; |
| 2157 |
#endif
|
| 2158 |
|
| 2159 |
vnc_display_close(ds); |
| 2160 |
if (strcmp(display, "none") == 0) |
| 2161 |
return 0; |
| 2162 |
|
| 2163 |
if (!(vs->display = strdup(display)))
|
| 2164 |
return -1; |
| 2165 |
|
| 2166 |
options = display; |
| 2167 |
while ((options = strchr(options, ','))) { |
| 2168 |
options++; |
| 2169 |
if (strncmp(options, "password", 8) == 0) { |
| 2170 |
password = 1; /* Require password auth */ |
| 2171 |
} else if (strncmp(options, "reverse", 7) == 0) { |
| 2172 |
reverse = 1;
|
| 2173 |
#ifdef CONFIG_VNC_TLS
|
| 2174 |
} else if (strncmp(options, "tls", 3) == 0) { |
| 2175 |
tls = 1; /* Require TLS */ |
| 2176 |
} else if (strncmp(options, "x509", 4) == 0) { |
| 2177 |
char *start, *end;
|
| 2178 |
x509 = 1; /* Require x509 certificates */ |
| 2179 |
if (strncmp(options, "x509verify", 10) == 0) |
| 2180 |
vs->x509verify = 1; /* ...and verify client certs */ |
| 2181 |
|
| 2182 |
/* Now check for 'x509=/some/path' postfix
|
| 2183 |
* and use that to setup x509 certificate/key paths */
|
| 2184 |
start = strchr(options, '=');
|
| 2185 |
end = strchr(options, ',');
|
| 2186 |
if (start && (!end || (start < end))) {
|
| 2187 |
int len = end ? end-(start+1) : strlen(start+1); |
| 2188 |
char *path = qemu_malloc(len+1); |
| 2189 |
strncpy(path, start+1, len);
|
| 2190 |
path[len] = '\0';
|
| 2191 |
VNC_DEBUG("Trying certificate path '%s'\n", path);
|
| 2192 |
if (vnc_set_x509_credential_dir(vs, path) < 0) { |
| 2193 |
fprintf(stderr, "Failed to find x509 certificates/keys in %s\n", path);
|
| 2194 |
qemu_free(path); |
| 2195 |
qemu_free(vs->display); |
| 2196 |
vs->display = NULL;
|
| 2197 |
return -1; |
| 2198 |
} |
| 2199 |
qemu_free(path); |
| 2200 |
} else {
|
| 2201 |
fprintf(stderr, "No certificate path provided\n");
|
| 2202 |
qemu_free(vs->display); |
| 2203 |
vs->display = NULL;
|
| 2204 |
return -1; |
| 2205 |
} |
| 2206 |
#endif
|
| 2207 |
} |
| 2208 |
} |
| 2209 |
|
| 2210 |
if (password) {
|
| 2211 |
#ifdef CONFIG_VNC_TLS
|
| 2212 |
if (tls) {
|
| 2213 |
vs->auth = VNC_AUTH_VENCRYPT; |
| 2214 |
if (x509) {
|
| 2215 |
VNC_DEBUG("Initializing VNC server with x509 password auth\n");
|
| 2216 |
vs->subauth = VNC_AUTH_VENCRYPT_X509VNC; |
| 2217 |
} else {
|
| 2218 |
VNC_DEBUG("Initializing VNC server with TLS password auth\n");
|
| 2219 |
vs->subauth = VNC_AUTH_VENCRYPT_TLSVNC; |
| 2220 |
} |
| 2221 |
} else {
|
| 2222 |
#endif
|
| 2223 |
VNC_DEBUG("Initializing VNC server with password auth\n");
|
| 2224 |
vs->auth = VNC_AUTH_VNC; |
| 2225 |
#ifdef CONFIG_VNC_TLS
|
| 2226 |
vs->subauth = VNC_AUTH_INVALID; |
| 2227 |
} |
| 2228 |
#endif
|
| 2229 |
} else {
|
| 2230 |
#ifdef CONFIG_VNC_TLS
|
| 2231 |
if (tls) {
|
| 2232 |
vs->auth = VNC_AUTH_VENCRYPT; |
| 2233 |
if (x509) {
|
| 2234 |
VNC_DEBUG("Initializing VNC server with x509 no auth\n");
|
| 2235 |
vs->subauth = VNC_AUTH_VENCRYPT_X509NONE; |
| 2236 |
} else {
|
| 2237 |
VNC_DEBUG("Initializing VNC server with TLS no auth\n");
|
| 2238 |
vs->subauth = VNC_AUTH_VENCRYPT_TLSNONE; |
| 2239 |
} |
| 2240 |
} else {
|
| 2241 |
#endif
|
| 2242 |
VNC_DEBUG("Initializing VNC server with no auth\n");
|
| 2243 |
vs->auth = VNC_AUTH_NONE; |
| 2244 |
#ifdef CONFIG_VNC_TLS
|
| 2245 |
vs->subauth = VNC_AUTH_INVALID; |
| 2246 |
} |
| 2247 |
#endif
|
| 2248 |
} |
| 2249 |
#ifndef _WIN32
|
| 2250 |
if (strstart(display, "unix:", &p)) { |
| 2251 |
addr = (struct sockaddr *)&uaddr;
|
| 2252 |
addrlen = sizeof(uaddr);
|
| 2253 |
|
| 2254 |
vs->lsock = socket(PF_UNIX, SOCK_STREAM, 0);
|
| 2255 |
if (vs->lsock == -1) { |
| 2256 |
fprintf(stderr, "Could not create socket\n");
|
| 2257 |
free(vs->display); |
| 2258 |
vs->display = NULL;
|
| 2259 |
return -1; |
| 2260 |
} |
| 2261 |
|
| 2262 |
uaddr.sun_family = AF_UNIX; |
| 2263 |
memset(uaddr.sun_path, 0, 108); |
| 2264 |
snprintf(uaddr.sun_path, 108, "%s", p); |
| 2265 |
|
| 2266 |
if (!reverse) {
|
| 2267 |
unlink(uaddr.sun_path); |
| 2268 |
} |
| 2269 |
} else
|
| 2270 |
#endif
|
| 2271 |
{
|
| 2272 |
addr = (struct sockaddr *)&iaddr;
|
| 2273 |
addrlen = sizeof(iaddr);
|
| 2274 |
|
| 2275 |
if (parse_host_port(&iaddr, display) < 0) { |
| 2276 |
fprintf(stderr, "Could not parse VNC address\n");
|
| 2277 |
free(vs->display); |
| 2278 |
vs->display = NULL;
|
| 2279 |
return -1; |
| 2280 |
} |
| 2281 |
|
| 2282 |
iaddr.sin_port = htons(ntohs(iaddr.sin_port) + (reverse ? 0 : 5900)); |
| 2283 |
|
| 2284 |
vs->lsock = socket(PF_INET, SOCK_STREAM, 0);
|
| 2285 |
if (vs->lsock == -1) { |
| 2286 |
fprintf(stderr, "Could not create socket\n");
|
| 2287 |
free(vs->display); |
| 2288 |
vs->display = NULL;
|
| 2289 |
return -1; |
| 2290 |
} |
| 2291 |
|
| 2292 |
reuse_addr = 1;
|
| 2293 |
ret = setsockopt(vs->lsock, SOL_SOCKET, SO_REUSEADDR, |
| 2294 |
(const char *)&reuse_addr, sizeof(reuse_addr)); |
| 2295 |
if (ret == -1) { |
| 2296 |
fprintf(stderr, "setsockopt() failed\n");
|
| 2297 |
close(vs->lsock); |
| 2298 |
vs->lsock = -1;
|
| 2299 |
free(vs->display); |
| 2300 |
vs->display = NULL;
|
| 2301 |
return -1; |
| 2302 |
} |
| 2303 |
} |
| 2304 |
|
| 2305 |
if (reverse) {
|
| 2306 |
if (connect(vs->lsock, addr, addrlen) == -1) { |
| 2307 |
fprintf(stderr, "Connection to VNC client failed\n");
|
| 2308 |
close(vs->lsock); |
| 2309 |
vs->lsock = -1;
|
| 2310 |
free(vs->display); |
| 2311 |
vs->display = NULL;
|
| 2312 |
return -1; |
| 2313 |
} else {
|
| 2314 |
vs->csock = vs->lsock; |
| 2315 |
vs->lsock = -1;
|
| 2316 |
vnc_connect(vs); |
| 2317 |
return 0; |
| 2318 |
} |
| 2319 |
} |
| 2320 |
|
| 2321 |
if (bind(vs->lsock, addr, addrlen) == -1) { |
| 2322 |
fprintf(stderr, "bind() failed\n");
|
| 2323 |
close(vs->lsock); |
| 2324 |
vs->lsock = -1;
|
| 2325 |
free(vs->display); |
| 2326 |
vs->display = NULL;
|
| 2327 |
return -1; |
| 2328 |
} |
| 2329 |
|
| 2330 |
if (listen(vs->lsock, 1) == -1) { |
| 2331 |
fprintf(stderr, "listen() failed\n");
|
| 2332 |
close(vs->lsock); |
| 2333 |
vs->lsock = -1;
|
| 2334 |
free(vs->display); |
| 2335 |
vs->display = NULL;
|
| 2336 |
return -1; |
| 2337 |
} |
| 2338 |
|
| 2339 |
return qemu_set_fd_handler2(vs->lsock, vnc_listen_poll, vnc_listen_read, NULL, vs); |
| 2340 |
} |