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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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#if 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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// #define _VNC_DEBUG 1
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#if _VNC_DEBUG
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#define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
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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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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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#if 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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#if CONFIG_VNC_TLS
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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
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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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#if 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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#if 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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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 = realloc(ds->data, w * h * vs->depth); |
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vs->old_data = 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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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 (vs->csock != -1 && vs->has_resize && size_changed) { |
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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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vs->width = ds->width; |
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vs->height = ds->height; |
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} |
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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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/* 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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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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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); |
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} |
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} |
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static void send_framebuffer_update_raw(VncState *vs, int x, int y, int w, int h) |
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{ |
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int i;
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uint8_t *row; |
380 |
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vnc_framebuffer_update(vs, x, y, w, h, 0);
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row = vs->ds->data + y * vs->ds->linesize + x * vs->depth; |
384 |
for (i = 0; i < h; i++) { |
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vs->write_pixels(vs, row, w * vs->depth); |
386 |
row += vs->ds->linesize; |
387 |
} |
388 |
} |
389 |
|
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static void hextile_enc_cord(uint8_t *ptr, int x, int y, int w, int h) |
391 |
{ |
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ptr[0] = ((x & 0x0F) << 4) | (y & 0x0F); |
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ptr[1] = (((w - 1) & 0x0F) << 4) | ((h - 1) & 0x0F); |
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} |
395 |
|
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#define BPP 8 |
397 |
#include "vnchextile.h" |
398 |
#undef BPP
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399 |
|
400 |
#define BPP 16 |
401 |
#include "vnchextile.h" |
402 |
#undef BPP
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403 |
|
404 |
#define BPP 32 |
405 |
#include "vnchextile.h" |
406 |
#undef BPP
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407 |
|
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#define GENERIC
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409 |
#define BPP 32 |
410 |
#include "vnchextile.h" |
411 |
#undef BPP
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412 |
#undef GENERIC
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413 |
|
414 |
static void send_framebuffer_update_hextile(VncState *vs, int x, int y, int w, int h) |
415 |
{ |
416 |
int i, j;
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417 |
int has_fg, has_bg;
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418 |
uint32_t last_fg32, last_bg32; |
419 |
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420 |
vnc_framebuffer_update(vs, x, y, w, h, 5);
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421 |
|
422 |
has_fg = has_bg = 0;
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423 |
for (j = y; j < (y + h); j += 16) { |
424 |
for (i = x; i < (x + w); i += 16) { |
425 |
vs->send_hextile_tile(vs, i, j, |
426 |
MIN(16, x + w - i), MIN(16, y + h - j), |
427 |
&last_bg32, &last_fg32, &has_bg, &has_fg); |
428 |
} |
429 |
} |
430 |
} |
431 |
|
432 |
static void send_framebuffer_update(VncState *vs, int x, int y, int w, int h) |
433 |
{ |
434 |
if (vs->has_hextile)
|
435 |
send_framebuffer_update_hextile(vs, x, y, w, h); |
436 |
else
|
437 |
send_framebuffer_update_raw(vs, x, y, w, h); |
438 |
} |
439 |
|
440 |
static void vnc_copy(DisplayState *ds, int src_x, int src_y, int dst_x, int dst_y, int w, int h) |
441 |
{ |
442 |
int src, dst;
|
443 |
uint8_t *src_row; |
444 |
uint8_t *dst_row; |
445 |
char *old_row;
|
446 |
int y = 0; |
447 |
int pitch = ds->linesize;
|
448 |
VncState *vs = ds->opaque; |
449 |
|
450 |
vnc_update_client(vs); |
451 |
|
452 |
if (dst_y > src_y) {
|
453 |
y = h - 1;
|
454 |
pitch = -pitch; |
455 |
} |
456 |
|
457 |
src = (ds->linesize * (src_y + y) + vs->depth * src_x); |
458 |
dst = (ds->linesize * (dst_y + y) + vs->depth * dst_x); |
459 |
|
460 |
src_row = ds->data + src; |
461 |
dst_row = ds->data + dst; |
462 |
old_row = vs->old_data + dst; |
463 |
|
464 |
for (y = 0; y < h; y++) { |
465 |
memmove(old_row, src_row, w * vs->depth); |
466 |
memmove(dst_row, src_row, w * vs->depth); |
467 |
src_row += pitch; |
468 |
dst_row += pitch; |
469 |
old_row += pitch; |
470 |
} |
471 |
|
472 |
vnc_write_u8(vs, 0); /* msg id */ |
473 |
vnc_write_u8(vs, 0);
|
474 |
vnc_write_u16(vs, 1); /* number of rects */ |
475 |
vnc_framebuffer_update(vs, dst_x, dst_y, w, h, 1);
|
476 |
vnc_write_u16(vs, src_x); |
477 |
vnc_write_u16(vs, src_y); |
478 |
vnc_flush(vs); |
479 |
} |
480 |
|
481 |
static int find_dirty_height(VncState *vs, int y, int last_x, int x) |
482 |
{ |
483 |
int h;
|
484 |
|
485 |
for (h = 1; h < (vs->height - y); h++) { |
486 |
int tmp_x;
|
487 |
if (!vnc_get_bit(vs->dirty_row[y + h], last_x))
|
488 |
break;
|
489 |
for (tmp_x = last_x; tmp_x < x; tmp_x++)
|
490 |
vnc_clear_bit(vs->dirty_row[y + h], tmp_x); |
491 |
} |
492 |
|
493 |
return h;
|
494 |
} |
495 |
|
496 |
static void vnc_update_client(void *opaque) |
497 |
{ |
498 |
VncState *vs = opaque; |
499 |
|
500 |
if (vs->need_update && vs->csock != -1) { |
501 |
int y;
|
502 |
uint8_t *row; |
503 |
char *old_row;
|
504 |
uint32_t width_mask[VNC_DIRTY_WORDS]; |
505 |
int n_rectangles;
|
506 |
int saved_offset;
|
507 |
int has_dirty = 0; |
508 |
|
509 |
vga_hw_update(); |
510 |
|
511 |
vnc_set_bits(width_mask, (vs->width / 16), VNC_DIRTY_WORDS);
|
512 |
|
513 |
/* Walk through the dirty map and eliminate tiles that
|
514 |
really aren't dirty */
|
515 |
row = vs->ds->data; |
516 |
old_row = vs->old_data; |
517 |
|
518 |
for (y = 0; y < vs->height; y++) { |
519 |
if (vnc_and_bits(vs->dirty_row[y], width_mask, VNC_DIRTY_WORDS)) {
|
520 |
int x;
|
521 |
uint8_t *ptr; |
522 |
char *old_ptr;
|
523 |
|
524 |
ptr = row; |
525 |
old_ptr = (char*)old_row;
|
526 |
|
527 |
for (x = 0; x < vs->ds->width; x += 16) { |
528 |
if (memcmp(old_ptr, ptr, 16 * vs->depth) == 0) { |
529 |
vnc_clear_bit(vs->dirty_row[y], (x / 16));
|
530 |
} else {
|
531 |
has_dirty = 1;
|
532 |
memcpy(old_ptr, ptr, 16 * vs->depth);
|
533 |
} |
534 |
|
535 |
ptr += 16 * vs->depth;
|
536 |
old_ptr += 16 * vs->depth;
|
537 |
} |
538 |
} |
539 |
|
540 |
row += vs->ds->linesize; |
541 |
old_row += vs->ds->linesize; |
542 |
} |
543 |
|
544 |
if (!has_dirty) {
|
545 |
qemu_mod_timer(vs->timer, qemu_get_clock(rt_clock) + VNC_REFRESH_INTERVAL); |
546 |
return;
|
547 |
} |
548 |
|
549 |
/* Count rectangles */
|
550 |
n_rectangles = 0;
|
551 |
vnc_write_u8(vs, 0); /* msg id */ |
552 |
vnc_write_u8(vs, 0);
|
553 |
saved_offset = vs->output.offset; |
554 |
vnc_write_u16(vs, 0);
|
555 |
|
556 |
for (y = 0; y < vs->height; y++) { |
557 |
int x;
|
558 |
int last_x = -1; |
559 |
for (x = 0; x < vs->width / 16; x++) { |
560 |
if (vnc_get_bit(vs->dirty_row[y], x)) {
|
561 |
if (last_x == -1) { |
562 |
last_x = x; |
563 |
} |
564 |
vnc_clear_bit(vs->dirty_row[y], x); |
565 |
} else {
|
566 |
if (last_x != -1) { |
567 |
int h = find_dirty_height(vs, y, last_x, x);
|
568 |
send_framebuffer_update(vs, last_x * 16, y, (x - last_x) * 16, h); |
569 |
n_rectangles++; |
570 |
} |
571 |
last_x = -1;
|
572 |
} |
573 |
} |
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 |
} |
580 |
vs->output.buffer[saved_offset] = (n_rectangles >> 8) & 0xFF; |
581 |
vs->output.buffer[saved_offset + 1] = n_rectangles & 0xFF; |
582 |
vnc_flush(vs); |
583 |
|
584 |
} |
585 |
|
586 |
if (vs->csock != -1) { |
587 |
qemu_mod_timer(vs->timer, qemu_get_clock(rt_clock) + VNC_REFRESH_INTERVAL); |
588 |
} |
589 |
|
590 |
} |
591 |
|
592 |
static int vnc_listen_poll(void *opaque) |
593 |
{ |
594 |
VncState *vs = opaque; |
595 |
if (vs->csock == -1) |
596 |
return 1; |
597 |
return 0; |
598 |
} |
599 |
|
600 |
static void buffer_reserve(Buffer *buffer, size_t len) |
601 |
{ |
602 |
if ((buffer->capacity - buffer->offset) < len) {
|
603 |
buffer->capacity += (len + 1024);
|
604 |
buffer->buffer = realloc(buffer->buffer, buffer->capacity); |
605 |
if (buffer->buffer == NULL) { |
606 |
fprintf(stderr, "vnc: out of memory\n");
|
607 |
exit(1);
|
608 |
} |
609 |
} |
610 |
} |
611 |
|
612 |
static int buffer_empty(Buffer *buffer) |
613 |
{ |
614 |
return buffer->offset == 0; |
615 |
} |
616 |
|
617 |
static uint8_t *buffer_end(Buffer *buffer)
|
618 |
{ |
619 |
return buffer->buffer + buffer->offset;
|
620 |
} |
621 |
|
622 |
static void buffer_reset(Buffer *buffer) |
623 |
{ |
624 |
buffer->offset = 0;
|
625 |
} |
626 |
|
627 |
static void buffer_append(Buffer *buffer, const void *data, size_t len) |
628 |
{ |
629 |
memcpy(buffer->buffer + buffer->offset, data, len); |
630 |
buffer->offset += len; |
631 |
} |
632 |
|
633 |
static int vnc_client_io_error(VncState *vs, int ret, int last_errno) |
634 |
{ |
635 |
if (ret == 0 || ret == -1) { |
636 |
if (ret == -1) { |
637 |
switch (last_errno) {
|
638 |
case EINTR:
|
639 |
case EAGAIN:
|
640 |
#ifdef _WIN32
|
641 |
case WSAEWOULDBLOCK:
|
642 |
#endif
|
643 |
return 0; |
644 |
default:
|
645 |
break;
|
646 |
} |
647 |
} |
648 |
|
649 |
VNC_DEBUG("Closing down client sock %d %d\n", ret, ret < 0 ? last_errno : 0); |
650 |
qemu_set_fd_handler2(vs->csock, NULL, NULL, NULL, NULL); |
651 |
closesocket(vs->csock); |
652 |
vs->csock = -1;
|
653 |
buffer_reset(&vs->input); |
654 |
buffer_reset(&vs->output); |
655 |
vs->need_update = 0;
|
656 |
#if CONFIG_VNC_TLS
|
657 |
if (vs->tls_session) {
|
658 |
gnutls_deinit(vs->tls_session); |
659 |
vs->tls_session = NULL;
|
660 |
} |
661 |
vs->wiremode = VNC_WIREMODE_CLEAR; |
662 |
#endif /* CONFIG_VNC_TLS */ |
663 |
return 0; |
664 |
} |
665 |
return ret;
|
666 |
} |
667 |
|
668 |
static void vnc_client_error(VncState *vs) |
669 |
{ |
670 |
vnc_client_io_error(vs, -1, EINVAL);
|
671 |
} |
672 |
|
673 |
static void vnc_client_write(void *opaque) |
674 |
{ |
675 |
long ret;
|
676 |
VncState *vs = opaque; |
677 |
|
678 |
#if CONFIG_VNC_TLS
|
679 |
if (vs->tls_session) {
|
680 |
ret = gnutls_write(vs->tls_session, vs->output.buffer, vs->output.offset); |
681 |
if (ret < 0) { |
682 |
if (ret == GNUTLS_E_AGAIN)
|
683 |
errno = EAGAIN; |
684 |
else
|
685 |
errno = EIO; |
686 |
ret = -1;
|
687 |
} |
688 |
} else
|
689 |
#endif /* CONFIG_VNC_TLS */ |
690 |
ret = send(vs->csock, vs->output.buffer, vs->output.offset, 0);
|
691 |
ret = vnc_client_io_error(vs, ret, socket_error()); |
692 |
if (!ret)
|
693 |
return;
|
694 |
|
695 |
memmove(vs->output.buffer, vs->output.buffer + ret, (vs->output.offset - ret)); |
696 |
vs->output.offset -= ret; |
697 |
|
698 |
if (vs->output.offset == 0) { |
699 |
qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs); |
700 |
} |
701 |
} |
702 |
|
703 |
static void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting) |
704 |
{ |
705 |
vs->read_handler = func; |
706 |
vs->read_handler_expect = expecting; |
707 |
} |
708 |
|
709 |
static void vnc_client_read(void *opaque) |
710 |
{ |
711 |
VncState *vs = opaque; |
712 |
long ret;
|
713 |
|
714 |
buffer_reserve(&vs->input, 4096);
|
715 |
|
716 |
#if CONFIG_VNC_TLS
|
717 |
if (vs->tls_session) {
|
718 |
ret = gnutls_read(vs->tls_session, buffer_end(&vs->input), 4096);
|
719 |
if (ret < 0) { |
720 |
if (ret == GNUTLS_E_AGAIN)
|
721 |
errno = EAGAIN; |
722 |
else
|
723 |
errno = EIO; |
724 |
ret = -1;
|
725 |
} |
726 |
} else
|
727 |
#endif /* CONFIG_VNC_TLS */ |
728 |
ret = recv(vs->csock, buffer_end(&vs->input), 4096, 0); |
729 |
ret = vnc_client_io_error(vs, ret, socket_error()); |
730 |
if (!ret)
|
731 |
return;
|
732 |
|
733 |
vs->input.offset += ret; |
734 |
|
735 |
while (vs->read_handler && vs->input.offset >= vs->read_handler_expect) {
|
736 |
size_t len = vs->read_handler_expect; |
737 |
int ret;
|
738 |
|
739 |
ret = vs->read_handler(vs, vs->input.buffer, len); |
740 |
if (vs->csock == -1) |
741 |
return;
|
742 |
|
743 |
if (!ret) {
|
744 |
memmove(vs->input.buffer, vs->input.buffer + len, (vs->input.offset - len)); |
745 |
vs->input.offset -= len; |
746 |
} else {
|
747 |
vs->read_handler_expect = ret; |
748 |
} |
749 |
} |
750 |
} |
751 |
|
752 |
static void vnc_write(VncState *vs, const void *data, size_t len) |
753 |
{ |
754 |
buffer_reserve(&vs->output, len); |
755 |
|
756 |
if (buffer_empty(&vs->output)) {
|
757 |
qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, vnc_client_write, vs);
|
758 |
} |
759 |
|
760 |
buffer_append(&vs->output, data, len); |
761 |
} |
762 |
|
763 |
static void vnc_write_s32(VncState *vs, int32_t value) |
764 |
{ |
765 |
vnc_write_u32(vs, *(uint32_t *)&value); |
766 |
} |
767 |
|
768 |
static void vnc_write_u32(VncState *vs, uint32_t value) |
769 |
{ |
770 |
uint8_t buf[4];
|
771 |
|
772 |
buf[0] = (value >> 24) & 0xFF; |
773 |
buf[1] = (value >> 16) & 0xFF; |
774 |
buf[2] = (value >> 8) & 0xFF; |
775 |
buf[3] = value & 0xFF; |
776 |
|
777 |
vnc_write(vs, buf, 4);
|
778 |
} |
779 |
|
780 |
static void vnc_write_u16(VncState *vs, uint16_t value) |
781 |
{ |
782 |
uint8_t buf[2];
|
783 |
|
784 |
buf[0] = (value >> 8) & 0xFF; |
785 |
buf[1] = value & 0xFF; |
786 |
|
787 |
vnc_write(vs, buf, 2);
|
788 |
} |
789 |
|
790 |
static void vnc_write_u8(VncState *vs, uint8_t value) |
791 |
{ |
792 |
vnc_write(vs, (char *)&value, 1); |
793 |
} |
794 |
|
795 |
static void vnc_flush(VncState *vs) |
796 |
{ |
797 |
if (vs->output.offset)
|
798 |
vnc_client_write(vs); |
799 |
} |
800 |
|
801 |
static uint8_t read_u8(uint8_t *data, size_t offset)
|
802 |
{ |
803 |
return data[offset];
|
804 |
} |
805 |
|
806 |
static uint16_t read_u16(uint8_t *data, size_t offset)
|
807 |
{ |
808 |
return ((data[offset] & 0xFF) << 8) | (data[offset + 1] & 0xFF); |
809 |
} |
810 |
|
811 |
static int32_t read_s32(uint8_t *data, size_t offset)
|
812 |
{ |
813 |
return (int32_t)((data[offset] << 24) | (data[offset + 1] << 16) | |
814 |
(data[offset + 2] << 8) | data[offset + 3]); |
815 |
} |
816 |
|
817 |
static uint32_t read_u32(uint8_t *data, size_t offset)
|
818 |
{ |
819 |
return ((data[offset] << 24) | (data[offset + 1] << 16) | |
820 |
(data[offset + 2] << 8) | data[offset + 3]); |
821 |
} |
822 |
|
823 |
#if CONFIG_VNC_TLS
|
824 |
static ssize_t vnc_tls_push(gnutls_transport_ptr_t transport,
|
825 |
const void *data, |
826 |
size_t len) { |
827 |
struct VncState *vs = (struct VncState *)transport; |
828 |
int ret;
|
829 |
|
830 |
retry:
|
831 |
ret = send(vs->csock, data, len, 0);
|
832 |
if (ret < 0) { |
833 |
if (errno == EINTR)
|
834 |
goto retry;
|
835 |
return -1; |
836 |
} |
837 |
return ret;
|
838 |
} |
839 |
|
840 |
|
841 |
static ssize_t vnc_tls_pull(gnutls_transport_ptr_t transport,
|
842 |
void *data,
|
843 |
size_t len) { |
844 |
struct VncState *vs = (struct VncState *)transport; |
845 |
int ret;
|
846 |
|
847 |
retry:
|
848 |
ret = recv(vs->csock, data, len, 0);
|
849 |
if (ret < 0) { |
850 |
if (errno == EINTR)
|
851 |
goto retry;
|
852 |
return -1; |
853 |
} |
854 |
return ret;
|
855 |
} |
856 |
#endif /* CONFIG_VNC_TLS */ |
857 |
|
858 |
static void client_cut_text(VncState *vs, size_t len, uint8_t *text) |
859 |
{ |
860 |
} |
861 |
|
862 |
static void check_pointer_type_change(VncState *vs, int absolute) |
863 |
{ |
864 |
if (vs->has_pointer_type_change && vs->absolute != absolute) {
|
865 |
vnc_write_u8(vs, 0);
|
866 |
vnc_write_u8(vs, 0);
|
867 |
vnc_write_u16(vs, 1);
|
868 |
vnc_framebuffer_update(vs, absolute, 0,
|
869 |
vs->ds->width, vs->ds->height, -257);
|
870 |
vnc_flush(vs); |
871 |
} |
872 |
vs->absolute = absolute; |
873 |
} |
874 |
|
875 |
static void pointer_event(VncState *vs, int button_mask, int x, int y) |
876 |
{ |
877 |
int buttons = 0; |
878 |
int dz = 0; |
879 |
|
880 |
if (button_mask & 0x01) |
881 |
buttons |= MOUSE_EVENT_LBUTTON; |
882 |
if (button_mask & 0x02) |
883 |
buttons |= MOUSE_EVENT_MBUTTON; |
884 |
if (button_mask & 0x04) |
885 |
buttons |= MOUSE_EVENT_RBUTTON; |
886 |
if (button_mask & 0x08) |
887 |
dz = -1;
|
888 |
if (button_mask & 0x10) |
889 |
dz = 1;
|
890 |
|
891 |
if (vs->absolute) {
|
892 |
kbd_mouse_event(x * 0x7FFF / (vs->ds->width - 1), |
893 |
y * 0x7FFF / (vs->ds->height - 1), |
894 |
dz, buttons); |
895 |
} else if (vs->has_pointer_type_change) { |
896 |
x -= 0x7FFF;
|
897 |
y -= 0x7FFF;
|
898 |
|
899 |
kbd_mouse_event(x, y, dz, buttons); |
900 |
} else {
|
901 |
if (vs->last_x != -1) |
902 |
kbd_mouse_event(x - vs->last_x, |
903 |
y - vs->last_y, |
904 |
dz, buttons); |
905 |
vs->last_x = x; |
906 |
vs->last_y = y; |
907 |
} |
908 |
|
909 |
check_pointer_type_change(vs, kbd_mouse_is_absolute()); |
910 |
} |
911 |
|
912 |
static void reset_keys(VncState *vs) |
913 |
{ |
914 |
int i;
|
915 |
for(i = 0; i < 256; i++) { |
916 |
if (vs->modifiers_state[i]) {
|
917 |
if (i & 0x80) |
918 |
kbd_put_keycode(0xe0);
|
919 |
kbd_put_keycode(i | 0x80);
|
920 |
vs->modifiers_state[i] = 0;
|
921 |
} |
922 |
} |
923 |
} |
924 |
|
925 |
static void press_key(VncState *vs, int keysym) |
926 |
{ |
927 |
kbd_put_keycode(keysym2scancode(vs->kbd_layout, keysym) & 0x7f);
|
928 |
kbd_put_keycode(keysym2scancode(vs->kbd_layout, keysym) | 0x80);
|
929 |
} |
930 |
|
931 |
static void do_key_event(VncState *vs, int down, uint32_t sym) |
932 |
{ |
933 |
int keycode;
|
934 |
|
935 |
keycode = keysym2scancode(vs->kbd_layout, sym & 0xFFFF);
|
936 |
|
937 |
/* QEMU console switch */
|
938 |
switch(keycode) {
|
939 |
case 0x2a: /* Left Shift */ |
940 |
case 0x36: /* Right Shift */ |
941 |
case 0x1d: /* Left CTRL */ |
942 |
case 0x9d: /* Right CTRL */ |
943 |
case 0x38: /* Left ALT */ |
944 |
case 0xb8: /* Right ALT */ |
945 |
if (down)
|
946 |
vs->modifiers_state[keycode] = 1;
|
947 |
else
|
948 |
vs->modifiers_state[keycode] = 0;
|
949 |
break;
|
950 |
case 0x02 ... 0x0a: /* '1' to '9' keys */ |
951 |
if (down && vs->modifiers_state[0x1d] && vs->modifiers_state[0x38]) { |
952 |
/* Reset the modifiers sent to the current console */
|
953 |
reset_keys(vs); |
954 |
console_select(keycode - 0x02);
|
955 |
return;
|
956 |
} |
957 |
break;
|
958 |
case 0x3a: /* CapsLock */ |
959 |
case 0x45: /* NumLock */ |
960 |
if (!down)
|
961 |
vs->modifiers_state[keycode] ^= 1;
|
962 |
break;
|
963 |
} |
964 |
|
965 |
if (keycode_is_keypad(vs->kbd_layout, keycode)) {
|
966 |
/* If the numlock state needs to change then simulate an additional
|
967 |
keypress before sending this one. This will happen if the user
|
968 |
toggles numlock away from the VNC window.
|
969 |
*/
|
970 |
if (keysym_is_numlock(vs->kbd_layout, sym & 0xFFFF)) { |
971 |
if (!vs->modifiers_state[0x45]) { |
972 |
vs->modifiers_state[0x45] = 1; |
973 |
press_key(vs, 0xff7f);
|
974 |
} |
975 |
} else {
|
976 |
if (vs->modifiers_state[0x45]) { |
977 |
vs->modifiers_state[0x45] = 0; |
978 |
press_key(vs, 0xff7f);
|
979 |
} |
980 |
} |
981 |
} |
982 |
|
983 |
if (is_graphic_console()) {
|
984 |
if (keycode & 0x80) |
985 |
kbd_put_keycode(0xe0);
|
986 |
if (down)
|
987 |
kbd_put_keycode(keycode & 0x7f);
|
988 |
else
|
989 |
kbd_put_keycode(keycode | 0x80);
|
990 |
} else {
|
991 |
/* QEMU console emulation */
|
992 |
if (down) {
|
993 |
switch (keycode) {
|
994 |
case 0x2a: /* Left Shift */ |
995 |
case 0x36: /* Right Shift */ |
996 |
case 0x1d: /* Left CTRL */ |
997 |
case 0x9d: /* Right CTRL */ |
998 |
case 0x38: /* Left ALT */ |
999 |
case 0xb8: /* Right ALT */ |
1000 |
break;
|
1001 |
case 0xc8: |
1002 |
kbd_put_keysym(QEMU_KEY_UP); |
1003 |
break;
|
1004 |
case 0xd0: |
1005 |
kbd_put_keysym(QEMU_KEY_DOWN); |
1006 |
break;
|
1007 |
case 0xcb: |
1008 |
kbd_put_keysym(QEMU_KEY_LEFT); |
1009 |
break;
|
1010 |
case 0xcd: |
1011 |
kbd_put_keysym(QEMU_KEY_RIGHT); |
1012 |
break;
|
1013 |
case 0xd3: |
1014 |
kbd_put_keysym(QEMU_KEY_DELETE); |
1015 |
break;
|
1016 |
case 0xc7: |
1017 |
kbd_put_keysym(QEMU_KEY_HOME); |
1018 |
break;
|
1019 |
case 0xcf: |
1020 |
kbd_put_keysym(QEMU_KEY_END); |
1021 |
break;
|
1022 |
case 0xc9: |
1023 |
kbd_put_keysym(QEMU_KEY_PAGEUP); |
1024 |
break;
|
1025 |
case 0xd1: |
1026 |
kbd_put_keysym(QEMU_KEY_PAGEDOWN); |
1027 |
break;
|
1028 |
default:
|
1029 |
kbd_put_keysym(sym); |
1030 |
break;
|
1031 |
} |
1032 |
} |
1033 |
} |
1034 |
} |
1035 |
|
1036 |
static void key_event(VncState *vs, int down, uint32_t sym) |
1037 |
{ |
1038 |
if (sym >= 'A' && sym <= 'Z' && is_graphic_console()) |
1039 |
sym = sym - 'A' + 'a'; |
1040 |
do_key_event(vs, down, sym); |
1041 |
} |
1042 |
|
1043 |
static void framebuffer_update_request(VncState *vs, int incremental, |
1044 |
int x_position, int y_position, |
1045 |
int w, int h) |
1046 |
{ |
1047 |
if (x_position > vs->ds->width)
|
1048 |
x_position = vs->ds->width; |
1049 |
if (y_position > vs->ds->height)
|
1050 |
y_position = vs->ds->height; |
1051 |
if (x_position + w >= vs->ds->width)
|
1052 |
w = vs->ds->width - x_position; |
1053 |
if (y_position + h >= vs->ds->height)
|
1054 |
h = vs->ds->height - y_position; |
1055 |
|
1056 |
int i;
|
1057 |
vs->need_update = 1;
|
1058 |
if (!incremental) {
|
1059 |
char *old_row = vs->old_data + y_position * vs->ds->linesize;
|
1060 |
|
1061 |
for (i = 0; i < h; i++) { |
1062 |
vnc_set_bits(vs->dirty_row[y_position + i], |
1063 |
(vs->ds->width / 16), VNC_DIRTY_WORDS);
|
1064 |
memset(old_row, 42, vs->ds->width * vs->depth);
|
1065 |
old_row += vs->ds->linesize; |
1066 |
} |
1067 |
} |
1068 |
} |
1069 |
|
1070 |
static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings) |
1071 |
{ |
1072 |
int i;
|
1073 |
|
1074 |
vs->has_hextile = 0;
|
1075 |
vs->has_resize = 0;
|
1076 |
vs->has_pointer_type_change = 0;
|
1077 |
vs->absolute = -1;
|
1078 |
vs->ds->dpy_copy = NULL;
|
1079 |
|
1080 |
for (i = n_encodings - 1; i >= 0; i--) { |
1081 |
switch (encodings[i]) {
|
1082 |
case 0: /* Raw */ |
1083 |
vs->has_hextile = 0;
|
1084 |
break;
|
1085 |
case 1: /* CopyRect */ |
1086 |
vs->ds->dpy_copy = vnc_copy; |
1087 |
break;
|
1088 |
case 5: /* Hextile */ |
1089 |
vs->has_hextile = 1;
|
1090 |
break;
|
1091 |
case -223: /* DesktopResize */ |
1092 |
vs->has_resize = 1;
|
1093 |
break;
|
1094 |
case -257: |
1095 |
vs->has_pointer_type_change = 1;
|
1096 |
break;
|
1097 |
default:
|
1098 |
break;
|
1099 |
} |
1100 |
} |
1101 |
|
1102 |
check_pointer_type_change(vs, kbd_mouse_is_absolute()); |
1103 |
} |
1104 |
|
1105 |
static int compute_nbits(unsigned int val) |
1106 |
{ |
1107 |
int n;
|
1108 |
n = 0;
|
1109 |
while (val != 0) { |
1110 |
n++; |
1111 |
val >>= 1;
|
1112 |
} |
1113 |
return n;
|
1114 |
} |
1115 |
|
1116 |
static void set_pixel_format(VncState *vs, |
1117 |
int bits_per_pixel, int depth, |
1118 |
int big_endian_flag, int true_color_flag, |
1119 |
int red_max, int green_max, int blue_max, |
1120 |
int red_shift, int green_shift, int blue_shift) |
1121 |
{ |
1122 |
int host_big_endian_flag;
|
1123 |
|
1124 |
#ifdef WORDS_BIGENDIAN
|
1125 |
host_big_endian_flag = 1;
|
1126 |
#else
|
1127 |
host_big_endian_flag = 0;
|
1128 |
#endif
|
1129 |
if (!true_color_flag) {
|
1130 |
fail:
|
1131 |
vnc_client_error(vs); |
1132 |
return;
|
1133 |
} |
1134 |
if (bits_per_pixel == 32 && |
1135 |
host_big_endian_flag == big_endian_flag && |
1136 |
red_max == 0xff && green_max == 0xff && blue_max == 0xff && |
1137 |
red_shift == 16 && green_shift == 8 && blue_shift == 0) { |
1138 |
vs->depth = 4;
|
1139 |
vs->write_pixels = vnc_write_pixels_copy; |
1140 |
vs->send_hextile_tile = send_hextile_tile_32; |
1141 |
} else
|
1142 |
if (bits_per_pixel == 16 && |
1143 |
host_big_endian_flag == big_endian_flag && |
1144 |
red_max == 31 && green_max == 63 && blue_max == 31 && |
1145 |
red_shift == 11 && green_shift == 5 && blue_shift == 0) { |
1146 |
vs->depth = 2;
|
1147 |
vs->write_pixels = vnc_write_pixels_copy; |
1148 |
vs->send_hextile_tile = send_hextile_tile_16; |
1149 |
} else
|
1150 |
if (bits_per_pixel == 8 && |
1151 |
red_max == 7 && green_max == 7 && blue_max == 3 && |
1152 |
red_shift == 5 && green_shift == 2 && blue_shift == 0) { |
1153 |
vs->depth = 1;
|
1154 |
vs->write_pixels = vnc_write_pixels_copy; |
1155 |
vs->send_hextile_tile = send_hextile_tile_8; |
1156 |
} else
|
1157 |
{ |
1158 |
/* generic and slower case */
|
1159 |
if (bits_per_pixel != 8 && |
1160 |
bits_per_pixel != 16 &&
|
1161 |
bits_per_pixel != 32)
|
1162 |
goto fail;
|
1163 |
vs->depth = 4;
|
1164 |
vs->red_shift = red_shift; |
1165 |
vs->red_max = red_max; |
1166 |
vs->red_shift1 = 24 - compute_nbits(red_max);
|
1167 |
vs->green_shift = green_shift; |
1168 |
vs->green_max = green_max; |
1169 |
vs->green_shift1 = 16 - compute_nbits(green_max);
|
1170 |
vs->blue_shift = blue_shift; |
1171 |
vs->blue_max = blue_max; |
1172 |
vs->blue_shift1 = 8 - compute_nbits(blue_max);
|
1173 |
vs->pix_bpp = bits_per_pixel / 8;
|
1174 |
vs->pix_big_endian = big_endian_flag; |
1175 |
vs->write_pixels = vnc_write_pixels_generic; |
1176 |
vs->send_hextile_tile = send_hextile_tile_generic; |
1177 |
} |
1178 |
|
1179 |
vnc_dpy_resize(vs->ds, vs->ds->width, vs->ds->height); |
1180 |
memset(vs->dirty_row, 0xFF, sizeof(vs->dirty_row)); |
1181 |
memset(vs->old_data, 42, vs->ds->linesize * vs->ds->height);
|
1182 |
|
1183 |
vga_hw_invalidate(); |
1184 |
vga_hw_update(); |
1185 |
} |
1186 |
|
1187 |
static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len) |
1188 |
{ |
1189 |
int i;
|
1190 |
uint16_t limit; |
1191 |
|
1192 |
switch (data[0]) { |
1193 |
case 0: |
1194 |
if (len == 1) |
1195 |
return 20; |
1196 |
|
1197 |
set_pixel_format(vs, read_u8(data, 4), read_u8(data, 5), |
1198 |
read_u8(data, 6), read_u8(data, 7), |
1199 |
read_u16(data, 8), read_u16(data, 10), |
1200 |
read_u16(data, 12), read_u8(data, 14), |
1201 |
read_u8(data, 15), read_u8(data, 16)); |
1202 |
break;
|
1203 |
case 2: |
1204 |
if (len == 1) |
1205 |
return 4; |
1206 |
|
1207 |
if (len == 4) |
1208 |
return 4 + (read_u16(data, 2) * 4); |
1209 |
|
1210 |
limit = read_u16(data, 2);
|
1211 |
for (i = 0; i < limit; i++) { |
1212 |
int32_t val = read_s32(data, 4 + (i * 4)); |
1213 |
memcpy(data + 4 + (i * 4), &val, sizeof(val)); |
1214 |
} |
1215 |
|
1216 |
set_encodings(vs, (int32_t *)(data + 4), limit);
|
1217 |
break;
|
1218 |
case 3: |
1219 |
if (len == 1) |
1220 |
return 10; |
1221 |
|
1222 |
framebuffer_update_request(vs, |
1223 |
read_u8(data, 1), read_u16(data, 2), read_u16(data, 4), |
1224 |
read_u16(data, 6), read_u16(data, 8)); |
1225 |
break;
|
1226 |
case 4: |
1227 |
if (len == 1) |
1228 |
return 8; |
1229 |
|
1230 |
key_event(vs, read_u8(data, 1), read_u32(data, 4)); |
1231 |
break;
|
1232 |
case 5: |
1233 |
if (len == 1) |
1234 |
return 6; |
1235 |
|
1236 |
pointer_event(vs, read_u8(data, 1), read_u16(data, 2), read_u16(data, 4)); |
1237 |
break;
|
1238 |
case 6: |
1239 |
if (len == 1) |
1240 |
return 8; |
1241 |
|
1242 |
if (len == 8) { |
1243 |
uint32_t dlen = read_u32(data, 4);
|
1244 |
if (dlen > 0) |
1245 |
return 8 + dlen; |
1246 |
} |
1247 |
|
1248 |
client_cut_text(vs, read_u32(data, 4), data + 8); |
1249 |
break;
|
1250 |
default:
|
1251 |
printf("Msg: %d\n", data[0]); |
1252 |
vnc_client_error(vs); |
1253 |
break;
|
1254 |
} |
1255 |
|
1256 |
vnc_read_when(vs, protocol_client_msg, 1);
|
1257 |
return 0; |
1258 |
} |
1259 |
|
1260 |
static int protocol_client_init(VncState *vs, uint8_t *data, size_t len) |
1261 |
{ |
1262 |
char pad[3] = { 0, 0, 0 }; |
1263 |
char buf[1024]; |
1264 |
int size;
|
1265 |
|
1266 |
vs->width = vs->ds->width; |
1267 |
vs->height = vs->ds->height; |
1268 |
vnc_write_u16(vs, vs->ds->width); |
1269 |
vnc_write_u16(vs, vs->ds->height); |
1270 |
|
1271 |
vnc_write_u8(vs, vs->depth * 8); /* bits-per-pixel */ |
1272 |
vnc_write_u8(vs, vs->depth * 8); /* depth */ |
1273 |
#ifdef WORDS_BIGENDIAN
|
1274 |
vnc_write_u8(vs, 1); /* big-endian-flag */ |
1275 |
#else
|
1276 |
vnc_write_u8(vs, 0); /* big-endian-flag */ |
1277 |
#endif
|
1278 |
vnc_write_u8(vs, 1); /* true-color-flag */ |
1279 |
if (vs->depth == 4) { |
1280 |
vnc_write_u16(vs, 0xFF); /* red-max */ |
1281 |
vnc_write_u16(vs, 0xFF); /* green-max */ |
1282 |
vnc_write_u16(vs, 0xFF); /* blue-max */ |
1283 |
vnc_write_u8(vs, 16); /* red-shift */ |
1284 |
vnc_write_u8(vs, 8); /* green-shift */ |
1285 |
vnc_write_u8(vs, 0); /* blue-shift */ |
1286 |
vs->send_hextile_tile = send_hextile_tile_32; |
1287 |
} else if (vs->depth == 2) { |
1288 |
vnc_write_u16(vs, 31); /* red-max */ |
1289 |
vnc_write_u16(vs, 63); /* green-max */ |
1290 |
vnc_write_u16(vs, 31); /* blue-max */ |
1291 |
vnc_write_u8(vs, 11); /* red-shift */ |
1292 |
vnc_write_u8(vs, 5); /* green-shift */ |
1293 |
vnc_write_u8(vs, 0); /* blue-shift */ |
1294 |
vs->send_hextile_tile = send_hextile_tile_16; |
1295 |
} else if (vs->depth == 1) { |
1296 |
/* XXX: change QEMU pixel 8 bit pixel format to match the VNC one ? */
|
1297 |
vnc_write_u16(vs, 7); /* red-max */ |
1298 |
vnc_write_u16(vs, 7); /* green-max */ |
1299 |
vnc_write_u16(vs, 3); /* blue-max */ |
1300 |
vnc_write_u8(vs, 5); /* red-shift */ |
1301 |
vnc_write_u8(vs, 2); /* green-shift */ |
1302 |
vnc_write_u8(vs, 0); /* blue-shift */ |
1303 |
vs->send_hextile_tile = send_hextile_tile_8; |
1304 |
} |
1305 |
vs->write_pixels = vnc_write_pixels_copy; |
1306 |
|
1307 |
vnc_write(vs, pad, 3); /* padding */ |
1308 |
|
1309 |
if (qemu_name)
|
1310 |
size = snprintf(buf, sizeof(buf), "QEMU (%s)", qemu_name); |
1311 |
else
|
1312 |
size = snprintf(buf, sizeof(buf), "QEMU"); |
1313 |
|
1314 |
vnc_write_u32(vs, size); |
1315 |
vnc_write(vs, buf, size); |
1316 |
vnc_flush(vs); |
1317 |
|
1318 |
vnc_read_when(vs, protocol_client_msg, 1);
|
1319 |
|
1320 |
return 0; |
1321 |
} |
1322 |
|
1323 |
static void make_challenge(VncState *vs) |
1324 |
{ |
1325 |
int i;
|
1326 |
|
1327 |
srand(time(NULL)+getpid()+getpid()*987654+rand()); |
1328 |
|
1329 |
for (i = 0 ; i < sizeof(vs->challenge) ; i++) |
1330 |
vs->challenge[i] = (int) (256.0*rand()/(RAND_MAX+1.0)); |
1331 |
} |
1332 |
|
1333 |
static int protocol_client_auth_vnc(VncState *vs, uint8_t *data, size_t len) |
1334 |
{ |
1335 |
unsigned char response[VNC_AUTH_CHALLENGE_SIZE]; |
1336 |
int i, j, pwlen;
|
1337 |
unsigned char key[8]; |
1338 |
|
1339 |
if (!vs->password || !vs->password[0]) { |
1340 |
VNC_DEBUG("No password configured on server");
|
1341 |
vnc_write_u32(vs, 1); /* Reject auth */ |
1342 |
if (vs->minor >= 8) { |
1343 |
static const char err[] = "Authentication failed"; |
1344 |
vnc_write_u32(vs, sizeof(err));
|
1345 |
vnc_write(vs, err, sizeof(err));
|
1346 |
} |
1347 |
vnc_flush(vs); |
1348 |
vnc_client_error(vs); |
1349 |
return 0; |
1350 |
} |
1351 |
|
1352 |
memcpy(response, vs->challenge, VNC_AUTH_CHALLENGE_SIZE); |
1353 |
|
1354 |
/* Calculate the expected challenge response */
|
1355 |
pwlen = strlen(vs->password); |
1356 |
for (i=0; i<sizeof(key); i++) |
1357 |
key[i] = i<pwlen ? vs->password[i] : 0;
|
1358 |
deskey(key, EN0); |
1359 |
for (j = 0; j < VNC_AUTH_CHALLENGE_SIZE; j += 8) |
1360 |
des(response+j, response+j); |
1361 |
|
1362 |
/* Compare expected vs actual challenge response */
|
1363 |
if (memcmp(response, data, VNC_AUTH_CHALLENGE_SIZE) != 0) { |
1364 |
VNC_DEBUG("Client challenge reponse did not match\n");
|
1365 |
vnc_write_u32(vs, 1); /* Reject auth */ |
1366 |
if (vs->minor >= 8) { |
1367 |
static const char err[] = "Authentication failed"; |
1368 |
vnc_write_u32(vs, sizeof(err));
|
1369 |
vnc_write(vs, err, sizeof(err));
|
1370 |
} |
1371 |
vnc_flush(vs); |
1372 |
vnc_client_error(vs); |
1373 |
} else {
|
1374 |
VNC_DEBUG("Accepting VNC challenge response\n");
|
1375 |
vnc_write_u32(vs, 0); /* Accept auth */ |
1376 |
vnc_flush(vs); |
1377 |
|
1378 |
vnc_read_when(vs, protocol_client_init, 1);
|
1379 |
} |
1380 |
return 0; |
1381 |
} |
1382 |
|
1383 |
static int start_auth_vnc(VncState *vs) |
1384 |
{ |
1385 |
make_challenge(vs); |
1386 |
/* Send client a 'random' challenge */
|
1387 |
vnc_write(vs, vs->challenge, sizeof(vs->challenge));
|
1388 |
vnc_flush(vs); |
1389 |
|
1390 |
vnc_read_when(vs, protocol_client_auth_vnc, sizeof(vs->challenge));
|
1391 |
return 0; |
1392 |
} |
1393 |
|
1394 |
|
1395 |
#if CONFIG_VNC_TLS
|
1396 |
#define DH_BITS 1024 |
1397 |
static gnutls_dh_params_t dh_params;
|
1398 |
|
1399 |
static int vnc_tls_initialize(void) |
1400 |
{ |
1401 |
static int tlsinitialized = 0; |
1402 |
|
1403 |
if (tlsinitialized)
|
1404 |
return 1; |
1405 |
|
1406 |
if (gnutls_global_init () < 0) |
1407 |
return 0; |
1408 |
|
1409 |
/* XXX ought to re-generate diffie-hellmen params periodically */
|
1410 |
if (gnutls_dh_params_init (&dh_params) < 0) |
1411 |
return 0; |
1412 |
if (gnutls_dh_params_generate2 (dh_params, DH_BITS) < 0) |
1413 |
return 0; |
1414 |
|
1415 |
#if _VNC_DEBUG == 2 |
1416 |
gnutls_global_set_log_level(10);
|
1417 |
gnutls_global_set_log_function(vnc_debug_gnutls_log); |
1418 |
#endif
|
1419 |
|
1420 |
tlsinitialized = 1;
|
1421 |
|
1422 |
return 1; |
1423 |
} |
1424 |
|
1425 |
static gnutls_anon_server_credentials vnc_tls_initialize_anon_cred(void) |
1426 |
{ |
1427 |
gnutls_anon_server_credentials anon_cred; |
1428 |
int ret;
|
1429 |
|
1430 |
if ((ret = gnutls_anon_allocate_server_credentials(&anon_cred)) < 0) { |
1431 |
VNC_DEBUG("Cannot allocate credentials %s\n", gnutls_strerror(ret));
|
1432 |
return NULL; |
1433 |
} |
1434 |
|
1435 |
gnutls_anon_set_server_dh_params(anon_cred, dh_params); |
1436 |
|
1437 |
return anon_cred;
|
1438 |
} |
1439 |
|
1440 |
|
1441 |
static gnutls_certificate_credentials_t vnc_tls_initialize_x509_cred(VncState *vs)
|
1442 |
{ |
1443 |
gnutls_certificate_credentials_t x509_cred; |
1444 |
int ret;
|
1445 |
|
1446 |
if (!vs->x509cacert) {
|
1447 |
VNC_DEBUG("No CA x509 certificate specified\n");
|
1448 |
return NULL; |
1449 |
} |
1450 |
if (!vs->x509cert) {
|
1451 |
VNC_DEBUG("No server x509 certificate specified\n");
|
1452 |
return NULL; |
1453 |
} |
1454 |
if (!vs->x509key) {
|
1455 |
VNC_DEBUG("No server private key specified\n");
|
1456 |
return NULL; |
1457 |
} |
1458 |
|
1459 |
if ((ret = gnutls_certificate_allocate_credentials(&x509_cred)) < 0) { |
1460 |
VNC_DEBUG("Cannot allocate credentials %s\n", gnutls_strerror(ret));
|
1461 |
return NULL; |
1462 |
} |
1463 |
if ((ret = gnutls_certificate_set_x509_trust_file(x509_cred,
|
1464 |
vs->x509cacert, |
1465 |
GNUTLS_X509_FMT_PEM)) < 0) {
|
1466 |
VNC_DEBUG("Cannot load CA certificate %s\n", gnutls_strerror(ret));
|
1467 |
gnutls_certificate_free_credentials(x509_cred); |
1468 |
return NULL; |
1469 |
} |
1470 |
|
1471 |
if ((ret = gnutls_certificate_set_x509_key_file (x509_cred,
|
1472 |
vs->x509cert, |
1473 |
vs->x509key, |
1474 |
GNUTLS_X509_FMT_PEM)) < 0) {
|
1475 |
VNC_DEBUG("Cannot load certificate & key %s\n", gnutls_strerror(ret));
|
1476 |
gnutls_certificate_free_credentials(x509_cred); |
1477 |
return NULL; |
1478 |
} |
1479 |
|
1480 |
if (vs->x509cacrl) {
|
1481 |
if ((ret = gnutls_certificate_set_x509_crl_file(x509_cred,
|
1482 |
vs->x509cacrl, |
1483 |
GNUTLS_X509_FMT_PEM)) < 0) {
|
1484 |
VNC_DEBUG("Cannot load CRL %s\n", gnutls_strerror(ret));
|
1485 |
gnutls_certificate_free_credentials(x509_cred); |
1486 |
return NULL; |
1487 |
} |
1488 |
} |
1489 |
|
1490 |
gnutls_certificate_set_dh_params (x509_cred, dh_params); |
1491 |
|
1492 |
return x509_cred;
|
1493 |
} |
1494 |
|
1495 |
static int vnc_validate_certificate(struct VncState *vs) |
1496 |
{ |
1497 |
int ret;
|
1498 |
unsigned int status; |
1499 |
const gnutls_datum_t *certs;
|
1500 |
unsigned int nCerts, i; |
1501 |
time_t now; |
1502 |
|
1503 |
VNC_DEBUG("Validating client certificate\n");
|
1504 |
if ((ret = gnutls_certificate_verify_peers2 (vs->tls_session, &status)) < 0) { |
1505 |
VNC_DEBUG("Verify failed %s\n", gnutls_strerror(ret));
|
1506 |
return -1; |
1507 |
} |
1508 |
|
1509 |
if ((now = time(NULL)) == ((time_t)-1)) { |
1510 |
return -1; |
1511 |
} |
1512 |
|
1513 |
if (status != 0) { |
1514 |
if (status & GNUTLS_CERT_INVALID)
|
1515 |
VNC_DEBUG("The certificate is not trusted.\n");
|
1516 |
|
1517 |
if (status & GNUTLS_CERT_SIGNER_NOT_FOUND)
|
1518 |
VNC_DEBUG("The certificate hasn't got a known issuer.\n");
|
1519 |
|
1520 |
if (status & GNUTLS_CERT_REVOKED)
|
1521 |
VNC_DEBUG("The certificate has been revoked.\n");
|
1522 |
|
1523 |
if (status & GNUTLS_CERT_INSECURE_ALGORITHM)
|
1524 |
VNC_DEBUG("The certificate uses an insecure algorithm\n");
|
1525 |
|
1526 |
return -1; |
1527 |
} else {
|
1528 |
VNC_DEBUG("Certificate is valid!\n");
|
1529 |
} |
1530 |
|
1531 |
/* Only support x509 for now */
|
1532 |
if (gnutls_certificate_type_get(vs->tls_session) != GNUTLS_CRT_X509)
|
1533 |
return -1; |
1534 |
|
1535 |
if (!(certs = gnutls_certificate_get_peers(vs->tls_session, &nCerts)))
|
1536 |
return -1; |
1537 |
|
1538 |
for (i = 0 ; i < nCerts ; i++) { |
1539 |
gnutls_x509_crt_t cert; |
1540 |
VNC_DEBUG ("Checking certificate chain %d\n", i);
|
1541 |
if (gnutls_x509_crt_init (&cert) < 0) |
1542 |
return -1; |
1543 |
|
1544 |
if (gnutls_x509_crt_import(cert, &certs[i], GNUTLS_X509_FMT_DER) < 0) { |
1545 |
gnutls_x509_crt_deinit (cert); |
1546 |
return -1; |
1547 |
} |
1548 |
|
1549 |
if (gnutls_x509_crt_get_expiration_time (cert) < now) {
|
1550 |
VNC_DEBUG("The certificate has expired\n");
|
1551 |
gnutls_x509_crt_deinit (cert); |
1552 |
return -1; |
1553 |
} |
1554 |
|
1555 |
if (gnutls_x509_crt_get_activation_time (cert) > now) {
|
1556 |
VNC_DEBUG("The certificate is not yet activated\n");
|
1557 |
gnutls_x509_crt_deinit (cert); |
1558 |
return -1; |
1559 |
} |
1560 |
|
1561 |
if (gnutls_x509_crt_get_activation_time (cert) > now) {
|
1562 |
VNC_DEBUG("The certificate is not yet activated\n");
|
1563 |
gnutls_x509_crt_deinit (cert); |
1564 |
return -1; |
1565 |
} |
1566 |
|
1567 |
gnutls_x509_crt_deinit (cert); |
1568 |
} |
1569 |
|
1570 |
return 0; |
1571 |
} |
1572 |
|
1573 |
|
1574 |
static int start_auth_vencrypt_subauth(VncState *vs) |
1575 |
{ |
1576 |
switch (vs->subauth) {
|
1577 |
case VNC_AUTH_VENCRYPT_TLSNONE:
|
1578 |
case VNC_AUTH_VENCRYPT_X509NONE:
|
1579 |
VNC_DEBUG("Accept TLS auth none\n");
|
1580 |
vnc_write_u32(vs, 0); /* Accept auth completion */ |
1581 |
vnc_read_when(vs, protocol_client_init, 1);
|
1582 |
break;
|
1583 |
|
1584 |
case VNC_AUTH_VENCRYPT_TLSVNC:
|
1585 |
case VNC_AUTH_VENCRYPT_X509VNC:
|
1586 |
VNC_DEBUG("Start TLS auth VNC\n");
|
1587 |
return start_auth_vnc(vs);
|
1588 |
|
1589 |
default: /* Should not be possible, but just in case */ |
1590 |
VNC_DEBUG("Reject auth %d\n", vs->auth);
|
1591 |
vnc_write_u8(vs, 1);
|
1592 |
if (vs->minor >= 8) { |
1593 |
static const char err[] = "Unsupported authentication type"; |
1594 |
vnc_write_u32(vs, sizeof(err));
|
1595 |
vnc_write(vs, err, sizeof(err));
|
1596 |
} |
1597 |
vnc_client_error(vs); |
1598 |
} |
1599 |
|
1600 |
return 0; |
1601 |
} |
1602 |
|
1603 |
static void vnc_handshake_io(void *opaque); |
1604 |
|
1605 |
static int vnc_continue_handshake(struct VncState *vs) { |
1606 |
int ret;
|
1607 |
|
1608 |
if ((ret = gnutls_handshake(vs->tls_session)) < 0) { |
1609 |
if (!gnutls_error_is_fatal(ret)) {
|
1610 |
VNC_DEBUG("Handshake interrupted (blocking)\n");
|
1611 |
if (!gnutls_record_get_direction(vs->tls_session))
|
1612 |
qemu_set_fd_handler(vs->csock, vnc_handshake_io, NULL, vs);
|
1613 |
else
|
1614 |
qemu_set_fd_handler(vs->csock, NULL, vnc_handshake_io, vs);
|
1615 |
return 0; |
1616 |
} |
1617 |
VNC_DEBUG("Handshake failed %s\n", gnutls_strerror(ret));
|
1618 |
vnc_client_error(vs); |
1619 |
return -1; |
1620 |
} |
1621 |
|
1622 |
if (vs->x509verify) {
|
1623 |
if (vnc_validate_certificate(vs) < 0) { |
1624 |
VNC_DEBUG("Client verification failed\n");
|
1625 |
vnc_client_error(vs); |
1626 |
return -1; |
1627 |
} else {
|
1628 |
VNC_DEBUG("Client verification passed\n");
|
1629 |
} |
1630 |
} |
1631 |
|
1632 |
VNC_DEBUG("Handshake done, switching to TLS data mode\n");
|
1633 |
vs->wiremode = VNC_WIREMODE_TLS; |
1634 |
qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, vnc_client_write, vs);
|
1635 |
|
1636 |
return start_auth_vencrypt_subauth(vs);
|
1637 |
} |
1638 |
|
1639 |
static void vnc_handshake_io(void *opaque) { |
1640 |
struct VncState *vs = (struct VncState *)opaque; |
1641 |
|
1642 |
VNC_DEBUG("Handshake IO continue\n");
|
1643 |
vnc_continue_handshake(vs); |
1644 |
} |
1645 |
|
1646 |
#define NEED_X509_AUTH(vs) \
|
1647 |
((vs)->subauth == VNC_AUTH_VENCRYPT_X509NONE || \ |
1648 |
(vs)->subauth == VNC_AUTH_VENCRYPT_X509VNC || \ |
1649 |
(vs)->subauth == VNC_AUTH_VENCRYPT_X509PLAIN) |
1650 |
|
1651 |
|
1652 |
static int vnc_start_tls(struct VncState *vs) { |
1653 |
static const int cert_type_priority[] = { GNUTLS_CRT_X509, 0 }; |
1654 |
static const int protocol_priority[]= { GNUTLS_TLS1_1, GNUTLS_TLS1_0, GNUTLS_SSL3, 0 }; |
1655 |
static const int kx_anon[] = {GNUTLS_KX_ANON_DH, 0}; |
1656 |
static const int kx_x509[] = {GNUTLS_KX_DHE_DSS, GNUTLS_KX_RSA, GNUTLS_KX_DHE_RSA, GNUTLS_KX_SRP, 0}; |
1657 |
|
1658 |
VNC_DEBUG("Do TLS setup\n");
|
1659 |
if (vnc_tls_initialize() < 0) { |
1660 |
VNC_DEBUG("Failed to init TLS\n");
|
1661 |
vnc_client_error(vs); |
1662 |
return -1; |
1663 |
} |
1664 |
if (vs->tls_session == NULL) { |
1665 |
if (gnutls_init(&vs->tls_session, GNUTLS_SERVER) < 0) { |
1666 |
vnc_client_error(vs); |
1667 |
return -1; |
1668 |
} |
1669 |
|
1670 |
if (gnutls_set_default_priority(vs->tls_session) < 0) { |
1671 |
gnutls_deinit(vs->tls_session); |
1672 |
vs->tls_session = NULL;
|
1673 |
vnc_client_error(vs); |
1674 |
return -1; |
1675 |
} |
1676 |
|
1677 |
if (gnutls_kx_set_priority(vs->tls_session, NEED_X509_AUTH(vs) ? kx_x509 : kx_anon) < 0) { |
1678 |
gnutls_deinit(vs->tls_session); |
1679 |
vs->tls_session = NULL;
|
1680 |
vnc_client_error(vs); |
1681 |
return -1; |
1682 |
} |
1683 |
|
1684 |
if (gnutls_certificate_type_set_priority(vs->tls_session, cert_type_priority) < 0) { |
1685 |
gnutls_deinit(vs->tls_session); |
1686 |
vs->tls_session = NULL;
|
1687 |
vnc_client_error(vs); |
1688 |
return -1; |
1689 |
} |
1690 |
|
1691 |
if (gnutls_protocol_set_priority(vs->tls_session, protocol_priority) < 0) { |
1692 |
gnutls_deinit(vs->tls_session); |
1693 |
vs->tls_session = NULL;
|
1694 |
vnc_client_error(vs); |
1695 |
return -1; |
1696 |
} |
1697 |
|
1698 |
if (NEED_X509_AUTH(vs)) {
|
1699 |
gnutls_certificate_server_credentials x509_cred = vnc_tls_initialize_x509_cred(vs); |
1700 |
if (!x509_cred) {
|
1701 |
gnutls_deinit(vs->tls_session); |
1702 |
vs->tls_session = NULL;
|
1703 |
vnc_client_error(vs); |
1704 |
return -1; |
1705 |
} |
1706 |
if (gnutls_credentials_set(vs->tls_session, GNUTLS_CRD_CERTIFICATE, x509_cred) < 0) { |
1707 |
gnutls_deinit(vs->tls_session); |
1708 |
vs->tls_session = NULL;
|
1709 |
gnutls_certificate_free_credentials(x509_cred); |
1710 |
vnc_client_error(vs); |
1711 |
return -1; |
1712 |
} |
1713 |
if (vs->x509verify) {
|
1714 |
VNC_DEBUG("Requesting a client certificate\n");
|
1715 |
gnutls_certificate_server_set_request (vs->tls_session, GNUTLS_CERT_REQUEST); |
1716 |
} |
1717 |
|
1718 |
} else {
|
1719 |
gnutls_anon_server_credentials anon_cred = vnc_tls_initialize_anon_cred(); |
1720 |
if (!anon_cred) {
|
1721 |
gnutls_deinit(vs->tls_session); |
1722 |
vs->tls_session = NULL;
|
1723 |
vnc_client_error(vs); |
1724 |
return -1; |
1725 |
} |
1726 |
if (gnutls_credentials_set(vs->tls_session, GNUTLS_CRD_ANON, anon_cred) < 0) { |
1727 |
gnutls_deinit(vs->tls_session); |
1728 |
vs->tls_session = NULL;
|
1729 |
gnutls_anon_free_server_credentials(anon_cred); |
1730 |
vnc_client_error(vs); |
1731 |
return -1; |
1732 |
} |
1733 |
} |
1734 |
|
1735 |
gnutls_transport_set_ptr(vs->tls_session, (gnutls_transport_ptr_t)vs); |
1736 |
gnutls_transport_set_push_function(vs->tls_session, vnc_tls_push); |
1737 |
gnutls_transport_set_pull_function(vs->tls_session, vnc_tls_pull); |
1738 |
} |
1739 |
|
1740 |
VNC_DEBUG("Start TLS handshake process\n");
|
1741 |
return vnc_continue_handshake(vs);
|
1742 |
} |
1743 |
|
1744 |
static int protocol_client_vencrypt_auth(VncState *vs, uint8_t *data, size_t len) |
1745 |
{ |
1746 |
int auth = read_u32(data, 0); |
1747 |
|
1748 |
if (auth != vs->subauth) {
|
1749 |
VNC_DEBUG("Rejecting auth %d\n", auth);
|
1750 |
vnc_write_u8(vs, 0); /* Reject auth */ |
1751 |
vnc_flush(vs); |
1752 |
vnc_client_error(vs); |
1753 |
} else {
|
1754 |
VNC_DEBUG("Accepting auth %d, starting handshake\n", auth);
|
1755 |
vnc_write_u8(vs, 1); /* Accept auth */ |
1756 |
vnc_flush(vs); |
1757 |
|
1758 |
if (vnc_start_tls(vs) < 0) { |
1759 |
VNC_DEBUG("Failed to complete TLS\n");
|
1760 |
return 0; |
1761 |
} |
1762 |
|
1763 |
if (vs->wiremode == VNC_WIREMODE_TLS) {
|
1764 |
VNC_DEBUG("Starting VeNCrypt subauth\n");
|
1765 |
return start_auth_vencrypt_subauth(vs);
|
1766 |
} else {
|
1767 |
VNC_DEBUG("TLS handshake blocked\n");
|
1768 |
return 0; |
1769 |
} |
1770 |
} |
1771 |
return 0; |
1772 |
} |
1773 |
|
1774 |
static int protocol_client_vencrypt_init(VncState *vs, uint8_t *data, size_t len) |
1775 |
{ |
1776 |
if (data[0] != 0 || |
1777 |
data[1] != 2) { |
1778 |
VNC_DEBUG("Unsupported VeNCrypt protocol %d.%d\n", (int)data[0], (int)data[1]); |
1779 |
vnc_write_u8(vs, 1); /* Reject version */ |
1780 |
vnc_flush(vs); |
1781 |
vnc_client_error(vs); |
1782 |
} else {
|
1783 |
VNC_DEBUG("Sending allowed auth %d\n", vs->subauth);
|
1784 |
vnc_write_u8(vs, 0); /* Accept version */ |
1785 |
vnc_write_u8(vs, 1); /* Number of sub-auths */ |
1786 |
vnc_write_u32(vs, vs->subauth); /* The supported auth */
|
1787 |
vnc_flush(vs); |
1788 |
vnc_read_when(vs, protocol_client_vencrypt_auth, 4);
|
1789 |
} |
1790 |
return 0; |
1791 |
} |
1792 |
|
1793 |
static int start_auth_vencrypt(VncState *vs) |
1794 |
{ |
1795 |
/* Send VeNCrypt version 0.2 */
|
1796 |
vnc_write_u8(vs, 0);
|
1797 |
vnc_write_u8(vs, 2);
|
1798 |
|
1799 |
vnc_read_when(vs, protocol_client_vencrypt_init, 2);
|
1800 |
return 0; |
1801 |
} |
1802 |
#endif /* CONFIG_VNC_TLS */ |
1803 |
|
1804 |
static int protocol_client_auth(VncState *vs, uint8_t *data, size_t len) |
1805 |
{ |
1806 |
/* We only advertise 1 auth scheme at a time, so client
|
1807 |
* must pick the one we sent. Verify this */
|
1808 |
if (data[0] != vs->auth) { /* Reject auth */ |
1809 |
VNC_DEBUG("Reject auth %d\n", (int)data[0]); |
1810 |
vnc_write_u32(vs, 1);
|
1811 |
if (vs->minor >= 8) { |
1812 |
static const char err[] = "Authentication failed"; |
1813 |
vnc_write_u32(vs, sizeof(err));
|
1814 |
vnc_write(vs, err, sizeof(err));
|
1815 |
} |
1816 |
vnc_client_error(vs); |
1817 |
} else { /* Accept requested auth */ |
1818 |
VNC_DEBUG("Client requested auth %d\n", (int)data[0]); |
1819 |
switch (vs->auth) {
|
1820 |
case VNC_AUTH_NONE:
|
1821 |
VNC_DEBUG("Accept auth none\n");
|
1822 |
if (vs->minor >= 8) { |
1823 |
vnc_write_u32(vs, 0); /* Accept auth completion */ |
1824 |
vnc_flush(vs); |
1825 |
} |
1826 |
vnc_read_when(vs, protocol_client_init, 1);
|
1827 |
break;
|
1828 |
|
1829 |
case VNC_AUTH_VNC:
|
1830 |
VNC_DEBUG("Start VNC auth\n");
|
1831 |
return start_auth_vnc(vs);
|
1832 |
|
1833 |
#if CONFIG_VNC_TLS
|
1834 |
case VNC_AUTH_VENCRYPT:
|
1835 |
VNC_DEBUG("Accept VeNCrypt auth\n");;
|
1836 |
return start_auth_vencrypt(vs);
|
1837 |
#endif /* CONFIG_VNC_TLS */ |
1838 |
|
1839 |
default: /* Should not be possible, but just in case */ |
1840 |
VNC_DEBUG("Reject auth %d\n", vs->auth);
|
1841 |
vnc_write_u8(vs, 1);
|
1842 |
if (vs->minor >= 8) { |
1843 |
static const char err[] = "Authentication failed"; |
1844 |
vnc_write_u32(vs, sizeof(err));
|
1845 |
vnc_write(vs, err, sizeof(err));
|
1846 |
} |
1847 |
vnc_client_error(vs); |
1848 |
} |
1849 |
} |
1850 |
return 0; |
1851 |
} |
1852 |
|
1853 |
static int protocol_version(VncState *vs, uint8_t *version, size_t len) |
1854 |
{ |
1855 |
char local[13]; |
1856 |
|
1857 |
memcpy(local, version, 12);
|
1858 |
local[12] = 0; |
1859 |
|
1860 |
if (sscanf(local, "RFB %03d.%03d\n", &vs->major, &vs->minor) != 2) { |
1861 |
VNC_DEBUG("Malformed protocol version %s\n", local);
|
1862 |
vnc_client_error(vs); |
1863 |
return 0; |
1864 |
} |
1865 |
VNC_DEBUG("Client request protocol version %d.%d\n", vs->major, vs->minor);
|
1866 |
if (vs->major != 3 || |
1867 |
(vs->minor != 3 &&
|
1868 |
vs->minor != 4 &&
|
1869 |
vs->minor != 5 &&
|
1870 |
vs->minor != 7 &&
|
1871 |
vs->minor != 8)) {
|
1872 |
VNC_DEBUG("Unsupported client version\n");
|
1873 |
vnc_write_u32(vs, VNC_AUTH_INVALID); |
1874 |
vnc_flush(vs); |
1875 |
vnc_client_error(vs); |
1876 |
return 0; |
1877 |
} |
1878 |
/* Some broken clients report v3.4 or v3.5, which spec requires to be treated
|
1879 |
* as equivalent to v3.3 by servers
|
1880 |
*/
|
1881 |
if (vs->minor == 4 || vs->minor == 5) |
1882 |
vs->minor = 3;
|
1883 |
|
1884 |
if (vs->minor == 3) { |
1885 |
if (vs->auth == VNC_AUTH_NONE) {
|
1886 |
VNC_DEBUG("Tell client auth none\n");
|
1887 |
vnc_write_u32(vs, vs->auth); |
1888 |
vnc_flush(vs); |
1889 |
vnc_read_when(vs, protocol_client_init, 1);
|
1890 |
} else if (vs->auth == VNC_AUTH_VNC) { |
1891 |
VNC_DEBUG("Tell client VNC auth\n");
|
1892 |
vnc_write_u32(vs, vs->auth); |
1893 |
vnc_flush(vs); |
1894 |
start_auth_vnc(vs); |
1895 |
} else {
|
1896 |
VNC_DEBUG("Unsupported auth %d for protocol 3.3\n", vs->auth);
|
1897 |
vnc_write_u32(vs, VNC_AUTH_INVALID); |
1898 |
vnc_flush(vs); |
1899 |
vnc_client_error(vs); |
1900 |
} |
1901 |
} else {
|
1902 |
VNC_DEBUG("Telling client we support auth %d\n", vs->auth);
|
1903 |
vnc_write_u8(vs, 1); /* num auth */ |
1904 |
vnc_write_u8(vs, vs->auth); |
1905 |
vnc_read_when(vs, protocol_client_auth, 1);
|
1906 |
vnc_flush(vs); |
1907 |
} |
1908 |
|
1909 |
return 0; |
1910 |
} |
1911 |
|
1912 |
static void vnc_connect(VncState *vs) |
1913 |
{ |
1914 |
VNC_DEBUG("New client on socket %d\n", vs->csock);
|
1915 |
socket_set_nonblock(vs->csock); |
1916 |
qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs); |
1917 |
vnc_write(vs, "RFB 003.008\n", 12); |
1918 |
vnc_flush(vs); |
1919 |
vnc_read_when(vs, protocol_version, 12);
|
1920 |
memset(vs->old_data, 0, vs->ds->linesize * vs->ds->height);
|
1921 |
memset(vs->dirty_row, 0xFF, sizeof(vs->dirty_row)); |
1922 |
vs->has_resize = 0;
|
1923 |
vs->has_hextile = 0;
|
1924 |
vs->ds->dpy_copy = NULL;
|
1925 |
vnc_update_client(vs); |
1926 |
} |
1927 |
|
1928 |
static void vnc_listen_read(void *opaque) |
1929 |
{ |
1930 |
VncState *vs = opaque; |
1931 |
struct sockaddr_in addr;
|
1932 |
socklen_t addrlen = sizeof(addr);
|
1933 |
|
1934 |
/* Catch-up */
|
1935 |
vga_hw_update(); |
1936 |
|
1937 |
vs->csock = accept(vs->lsock, (struct sockaddr *)&addr, &addrlen);
|
1938 |
if (vs->csock != -1) { |
1939 |
vnc_connect(vs); |
1940 |
} |
1941 |
} |
1942 |
|
1943 |
extern int parse_host_port(struct sockaddr_in *saddr, const char *str); |
1944 |
|
1945 |
void vnc_display_init(DisplayState *ds)
|
1946 |
{ |
1947 |
VncState *vs; |
1948 |
|
1949 |
vs = qemu_mallocz(sizeof(VncState));
|
1950 |
if (!vs)
|
1951 |
exit(1);
|
1952 |
|
1953 |
ds->opaque = vs; |
1954 |
vnc_state = vs; |
1955 |
vs->display = NULL;
|
1956 |
vs->password = NULL;
|
1957 |
|
1958 |
vs->lsock = -1;
|
1959 |
vs->csock = -1;
|
1960 |
vs->depth = 4;
|
1961 |
vs->last_x = -1;
|
1962 |
vs->last_y = -1;
|
1963 |
|
1964 |
vs->ds = ds; |
1965 |
|
1966 |
if (!keyboard_layout)
|
1967 |
keyboard_layout = "en-us";
|
1968 |
|
1969 |
vs->kbd_layout = init_keyboard_layout(keyboard_layout); |
1970 |
if (!vs->kbd_layout)
|
1971 |
exit(1);
|
1972 |
|
1973 |
vs->timer = qemu_new_timer(rt_clock, vnc_update_client, vs); |
1974 |
|
1975 |
vs->ds->data = NULL;
|
1976 |
vs->ds->dpy_update = vnc_dpy_update; |
1977 |
vs->ds->dpy_resize = vnc_dpy_resize; |
1978 |
vs->ds->dpy_refresh = NULL;
|
1979 |
|
1980 |
memset(vs->dirty_row, 0xFF, sizeof(vs->dirty_row)); |
1981 |
|
1982 |
vnc_dpy_resize(vs->ds, 640, 400); |
1983 |
} |
1984 |
|
1985 |
#if CONFIG_VNC_TLS
|
1986 |
static int vnc_set_x509_credential(VncState *vs, |
1987 |
const char *certdir, |
1988 |
const char *filename, |
1989 |
char **cred,
|
1990 |
int ignoreMissing)
|
1991 |
{ |
1992 |
struct stat sb;
|
1993 |
|
1994 |
if (*cred) {
|
1995 |
qemu_free(*cred); |
1996 |
*cred = NULL;
|
1997 |
} |
1998 |
|
1999 |
if (!(*cred = qemu_malloc(strlen(certdir) + strlen(filename) + 2))) |
2000 |
return -1; |
2001 |
|
2002 |
strcpy(*cred, certdir); |
2003 |
strcat(*cred, "/");
|
2004 |
strcat(*cred, filename); |
2005 |
|
2006 |
VNC_DEBUG("Check %s\n", *cred);
|
2007 |
if (stat(*cred, &sb) < 0) { |
2008 |
qemu_free(*cred); |
2009 |
*cred = NULL;
|
2010 |
if (ignoreMissing && errno == ENOENT)
|
2011 |
return 0; |
2012 |
return -1; |
2013 |
} |
2014 |
|
2015 |
return 0; |
2016 |
} |
2017 |
|
2018 |
static int vnc_set_x509_credential_dir(VncState *vs, |
2019 |
const char *certdir) |
2020 |
{ |
2021 |
if (vnc_set_x509_credential(vs, certdir, X509_CA_CERT_FILE, &vs->x509cacert, 0) < 0) |
2022 |
goto cleanup;
|
2023 |
if (vnc_set_x509_credential(vs, certdir, X509_CA_CRL_FILE, &vs->x509cacrl, 1) < 0) |
2024 |
goto cleanup;
|
2025 |
if (vnc_set_x509_credential(vs, certdir, X509_SERVER_CERT_FILE, &vs->x509cert, 0) < 0) |
2026 |
goto cleanup;
|
2027 |
if (vnc_set_x509_credential(vs, certdir, X509_SERVER_KEY_FILE, &vs->x509key, 0) < 0) |
2028 |
goto cleanup;
|
2029 |
|
2030 |
return 0; |
2031 |
|
2032 |
cleanup:
|
2033 |
qemu_free(vs->x509cacert); |
2034 |
qemu_free(vs->x509cacrl); |
2035 |
qemu_free(vs->x509cert); |
2036 |
qemu_free(vs->x509key); |
2037 |
vs->x509cacert = vs->x509cacrl = vs->x509cert = vs->x509key = NULL;
|
2038 |
return -1; |
2039 |
} |
2040 |
#endif /* CONFIG_VNC_TLS */ |
2041 |
|
2042 |
void vnc_display_close(DisplayState *ds)
|
2043 |
{ |
2044 |
VncState *vs = ds ? (VncState *)ds->opaque : vnc_state; |
2045 |
|
2046 |
if (vs->display) {
|
2047 |
qemu_free(vs->display); |
2048 |
vs->display = NULL;
|
2049 |
} |
2050 |
if (vs->lsock != -1) { |
2051 |
qemu_set_fd_handler2(vs->lsock, NULL, NULL, NULL, NULL); |
2052 |
close(vs->lsock); |
2053 |
vs->lsock = -1;
|
2054 |
} |
2055 |
if (vs->csock != -1) { |
2056 |
qemu_set_fd_handler2(vs->csock, NULL, NULL, NULL, NULL); |
2057 |
closesocket(vs->csock); |
2058 |
vs->csock = -1;
|
2059 |
buffer_reset(&vs->input); |
2060 |
buffer_reset(&vs->output); |
2061 |
vs->need_update = 0;
|
2062 |
#if CONFIG_VNC_TLS
|
2063 |
if (vs->tls_session) {
|
2064 |
gnutls_deinit(vs->tls_session); |
2065 |
vs->tls_session = NULL;
|
2066 |
} |
2067 |
vs->wiremode = VNC_WIREMODE_CLEAR; |
2068 |
#endif /* CONFIG_VNC_TLS */ |
2069 |
} |
2070 |
vs->auth = VNC_AUTH_INVALID; |
2071 |
#if CONFIG_VNC_TLS
|
2072 |
vs->subauth = VNC_AUTH_INVALID; |
2073 |
vs->x509verify = 0;
|
2074 |
#endif
|
2075 |
} |
2076 |
|
2077 |
int vnc_display_password(DisplayState *ds, const char *password) |
2078 |
{ |
2079 |
VncState *vs = ds ? (VncState *)ds->opaque : vnc_state; |
2080 |
|
2081 |
if (vs->password) {
|
2082 |
qemu_free(vs->password); |
2083 |
vs->password = NULL;
|
2084 |
} |
2085 |
if (password && password[0]) { |
2086 |
if (!(vs->password = qemu_strdup(password)))
|
2087 |
return -1; |
2088 |
} |
2089 |
|
2090 |
return 0; |
2091 |
} |
2092 |
|
2093 |
int vnc_display_open(DisplayState *ds, const char *display) |
2094 |
{ |
2095 |
struct sockaddr *addr;
|
2096 |
struct sockaddr_in iaddr;
|
2097 |
#ifndef _WIN32
|
2098 |
struct sockaddr_un uaddr;
|
2099 |
const char *p; |
2100 |
#endif
|
2101 |
int reuse_addr, ret;
|
2102 |
socklen_t addrlen; |
2103 |
VncState *vs = ds ? (VncState *)ds->opaque : vnc_state; |
2104 |
const char *options; |
2105 |
int password = 0; |
2106 |
int reverse = 0; |
2107 |
#if CONFIG_VNC_TLS
|
2108 |
int tls = 0, x509 = 0; |
2109 |
#endif
|
2110 |
|
2111 |
vnc_display_close(ds); |
2112 |
if (strcmp(display, "none") == 0) |
2113 |
return 0; |
2114 |
|
2115 |
if (!(vs->display = strdup(display)))
|
2116 |
return -1; |
2117 |
|
2118 |
options = display; |
2119 |
while ((options = strchr(options, ','))) { |
2120 |
options++; |
2121 |
if (strncmp(options, "password", 8) == 0) { |
2122 |
password = 1; /* Require password auth */ |
2123 |
} else if (strncmp(options, "reverse", 7) == 0) { |
2124 |
reverse = 1;
|
2125 |
#if CONFIG_VNC_TLS
|
2126 |
} else if (strncmp(options, "tls", 3) == 0) { |
2127 |
tls = 1; /* Require TLS */ |
2128 |
} else if (strncmp(options, "x509", 4) == 0) { |
2129 |
char *start, *end;
|
2130 |
x509 = 1; /* Require x509 certificates */ |
2131 |
if (strncmp(options, "x509verify", 10) == 0) |
2132 |
vs->x509verify = 1; /* ...and verify client certs */ |
2133 |
|
2134 |
/* Now check for 'x509=/some/path' postfix
|
2135 |
* and use that to setup x509 certificate/key paths */
|
2136 |
start = strchr(options, '=');
|
2137 |
end = strchr(options, ',');
|
2138 |
if (start && (!end || (start < end))) {
|
2139 |
int len = end ? end-(start+1) : strlen(start+1); |
2140 |
char *path = qemu_malloc(len+1); |
2141 |
strncpy(path, start+1, len);
|
2142 |
path[len] = '\0';
|
2143 |
VNC_DEBUG("Trying certificate path '%s'\n", path);
|
2144 |
if (vnc_set_x509_credential_dir(vs, path) < 0) { |
2145 |
fprintf(stderr, "Failed to find x509 certificates/keys in %s\n", path);
|
2146 |
qemu_free(path); |
2147 |
qemu_free(vs->display); |
2148 |
vs->display = NULL;
|
2149 |
return -1; |
2150 |
} |
2151 |
qemu_free(path); |
2152 |
} else {
|
2153 |
fprintf(stderr, "No certificate path provided\n");
|
2154 |
qemu_free(vs->display); |
2155 |
vs->display = NULL;
|
2156 |
return -1; |
2157 |
} |
2158 |
#endif
|
2159 |
} |
2160 |
} |
2161 |
|
2162 |
if (password) {
|
2163 |
#if CONFIG_VNC_TLS
|
2164 |
if (tls) {
|
2165 |
vs->auth = VNC_AUTH_VENCRYPT; |
2166 |
if (x509) {
|
2167 |
VNC_DEBUG("Initializing VNC server with x509 password auth\n");
|
2168 |
vs->subauth = VNC_AUTH_VENCRYPT_X509VNC; |
2169 |
} else {
|
2170 |
VNC_DEBUG("Initializing VNC server with TLS password auth\n");
|
2171 |
vs->subauth = VNC_AUTH_VENCRYPT_TLSVNC; |
2172 |
} |
2173 |
} else {
|
2174 |
#endif
|
2175 |
VNC_DEBUG("Initializing VNC server with password auth\n");
|
2176 |
vs->auth = VNC_AUTH_VNC; |
2177 |
#if CONFIG_VNC_TLS
|
2178 |
vs->subauth = VNC_AUTH_INVALID; |
2179 |
} |
2180 |
#endif
|
2181 |
} else {
|
2182 |
#if CONFIG_VNC_TLS
|
2183 |
if (tls) {
|
2184 |
vs->auth = VNC_AUTH_VENCRYPT; |
2185 |
if (x509) {
|
2186 |
VNC_DEBUG("Initializing VNC server with x509 no auth\n");
|
2187 |
vs->subauth = VNC_AUTH_VENCRYPT_X509NONE; |
2188 |
} else {
|
2189 |
VNC_DEBUG("Initializing VNC server with TLS no auth\n");
|
2190 |
vs->subauth = VNC_AUTH_VENCRYPT_TLSNONE; |
2191 |
} |
2192 |
} else {
|
2193 |
#endif
|
2194 |
VNC_DEBUG("Initializing VNC server with no auth\n");
|
2195 |
vs->auth = VNC_AUTH_NONE; |
2196 |
#if CONFIG_VNC_TLS
|
2197 |
vs->subauth = VNC_AUTH_INVALID; |
2198 |
} |
2199 |
#endif
|
2200 |
} |
2201 |
#ifndef _WIN32
|
2202 |
if (strstart(display, "unix:", &p)) { |
2203 |
addr = (struct sockaddr *)&uaddr;
|
2204 |
addrlen = sizeof(uaddr);
|
2205 |
|
2206 |
vs->lsock = socket(PF_UNIX, SOCK_STREAM, 0);
|
2207 |
if (vs->lsock == -1) { |
2208 |
fprintf(stderr, "Could not create socket\n");
|
2209 |
free(vs->display); |
2210 |
vs->display = NULL;
|
2211 |
return -1; |
2212 |
} |
2213 |
|
2214 |
uaddr.sun_family = AF_UNIX; |
2215 |
memset(uaddr.sun_path, 0, 108); |
2216 |
snprintf(uaddr.sun_path, 108, "%s", p); |
2217 |
|
2218 |
if (!reverse) {
|
2219 |
unlink(uaddr.sun_path); |
2220 |
} |
2221 |
} else
|
2222 |
#endif
|
2223 |
{ |
2224 |
addr = (struct sockaddr *)&iaddr;
|
2225 |
addrlen = sizeof(iaddr);
|
2226 |
|
2227 |
if (parse_host_port(&iaddr, display) < 0) { |
2228 |
fprintf(stderr, "Could not parse VNC address\n");
|
2229 |
free(vs->display); |
2230 |
vs->display = NULL;
|
2231 |
return -1; |
2232 |
} |
2233 |
|
2234 |
iaddr.sin_port = htons(ntohs(iaddr.sin_port) + (reverse ? 0 : 5900)); |
2235 |
|
2236 |
vs->lsock = socket(PF_INET, SOCK_STREAM, 0);
|
2237 |
if (vs->lsock == -1) { |
2238 |
fprintf(stderr, "Could not create socket\n");
|
2239 |
free(vs->display); |
2240 |
vs->display = NULL;
|
2241 |
return -1; |
2242 |
} |
2243 |
|
2244 |
reuse_addr = 1;
|
2245 |
ret = setsockopt(vs->lsock, SOL_SOCKET, SO_REUSEADDR, |
2246 |
(const char *)&reuse_addr, sizeof(reuse_addr)); |
2247 |
if (ret == -1) { |
2248 |
fprintf(stderr, "setsockopt() failed\n");
|
2249 |
close(vs->lsock); |
2250 |
vs->lsock = -1;
|
2251 |
free(vs->display); |
2252 |
vs->display = NULL;
|
2253 |
return -1; |
2254 |
} |
2255 |
} |
2256 |
|
2257 |
if (reverse) {
|
2258 |
if (connect(vs->lsock, addr, addrlen) == -1) { |
2259 |
fprintf(stderr, "Connection to VNC client failed\n");
|
2260 |
close(vs->lsock); |
2261 |
vs->lsock = -1;
|
2262 |
free(vs->display); |
2263 |
vs->display = NULL;
|
2264 |
return -1; |
2265 |
} else {
|
2266 |
vs->csock = vs->lsock; |
2267 |
vs->lsock = -1;
|
2268 |
vnc_connect(vs); |
2269 |
return 0; |
2270 |
} |
2271 |
} |
2272 |
|
2273 |
if (bind(vs->lsock, addr, addrlen) == -1) { |
2274 |
fprintf(stderr, "bind() failed\n");
|
2275 |
close(vs->lsock); |
2276 |
vs->lsock = -1;
|
2277 |
free(vs->display); |
2278 |
vs->display = NULL;
|
2279 |
return -1; |
2280 |
} |
2281 |
|
2282 |
if (listen(vs->lsock, 1) == -1) { |
2283 |
fprintf(stderr, "listen() failed\n");
|
2284 |
close(vs->lsock); |
2285 |
vs->lsock = -1;
|
2286 |
free(vs->display); |
2287 |
vs->display = NULL;
|
2288 |
return -1; |
2289 |
} |
2290 |
|
2291 |
return qemu_set_fd_handler2(vs->lsock, vnc_listen_poll, vnc_listen_read, NULL, vs); |
2292 |
} |