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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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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 = 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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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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/* 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; |
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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; |
392 |
for (i = 0; i < h; i++) { |
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vs->write_pixels(vs, row, w * vs->depth); |
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row += vs->ds->linesize; |
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} |
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} |
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); |
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} |
403 |
|
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#define BPP 8 |
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#include "vnchextile.h" |
406 |
#undef BPP
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#define BPP 16 |
409 |
#include "vnchextile.h" |
410 |
#undef BPP
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411 |
|
412 |
#define BPP 32 |
413 |
#include "vnchextile.h" |
414 |
#undef BPP
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415 |
|
416 |
#define GENERIC
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417 |
#define BPP 32 |
418 |
#include "vnchextile.h" |
419 |
#undef BPP
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420 |
#undef GENERIC
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421 |
|
422 |
static void send_framebuffer_update_hextile(VncState *vs, int x, int y, int w, int h) |
423 |
{ |
424 |
int i, j;
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425 |
int has_fg, has_bg;
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uint32_t last_fg32, last_bg32; |
427 |
|
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vnc_framebuffer_update(vs, x, y, w, h, 5);
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429 |
|
430 |
has_fg = has_bg = 0;
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431 |
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, |
434 |
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)
|
443 |
send_framebuffer_update_hextile(vs, x, y, w, h); |
444 |
else
|
445 |
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;
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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))
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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 = 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 |
buffer_reset(&vs->input); |
662 |
buffer_reset(&vs->output); |
663 |
vs->need_update = 0;
|
664 |
#if CONFIG_VNC_TLS
|
665 |
if (vs->tls_session) {
|
666 |
gnutls_deinit(vs->tls_session); |
667 |
vs->tls_session = NULL;
|
668 |
} |
669 |
vs->wiremode = VNC_WIREMODE_CLEAR; |
670 |
#endif /* CONFIG_VNC_TLS */ |
671 |
return 0; |
672 |
} |
673 |
return ret;
|
674 |
} |
675 |
|
676 |
static void vnc_client_error(VncState *vs) |
677 |
{ |
678 |
vnc_client_io_error(vs, -1, EINVAL);
|
679 |
} |
680 |
|
681 |
static void vnc_client_write(void *opaque) |
682 |
{ |
683 |
long ret;
|
684 |
VncState *vs = opaque; |
685 |
|
686 |
#if CONFIG_VNC_TLS
|
687 |
if (vs->tls_session) {
|
688 |
ret = gnutls_write(vs->tls_session, vs->output.buffer, vs->output.offset); |
689 |
if (ret < 0) { |
690 |
if (ret == GNUTLS_E_AGAIN)
|
691 |
errno = EAGAIN; |
692 |
else
|
693 |
errno = EIO; |
694 |
ret = -1;
|
695 |
} |
696 |
} else
|
697 |
#endif /* CONFIG_VNC_TLS */ |
698 |
ret = send(vs->csock, vs->output.buffer, vs->output.offset, 0);
|
699 |
ret = vnc_client_io_error(vs, ret, socket_error()); |
700 |
if (!ret)
|
701 |
return;
|
702 |
|
703 |
memmove(vs->output.buffer, vs->output.buffer + ret, (vs->output.offset - ret)); |
704 |
vs->output.offset -= ret; |
705 |
|
706 |
if (vs->output.offset == 0) { |
707 |
qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs); |
708 |
} |
709 |
} |
710 |
|
711 |
static void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting) |
712 |
{ |
713 |
vs->read_handler = func; |
714 |
vs->read_handler_expect = expecting; |
715 |
} |
716 |
|
717 |
static void vnc_client_read(void *opaque) |
718 |
{ |
719 |
VncState *vs = opaque; |
720 |
long ret;
|
721 |
|
722 |
buffer_reserve(&vs->input, 4096);
|
723 |
|
724 |
#if CONFIG_VNC_TLS
|
725 |
if (vs->tls_session) {
|
726 |
ret = gnutls_read(vs->tls_session, buffer_end(&vs->input), 4096);
|
727 |
if (ret < 0) { |
728 |
if (ret == GNUTLS_E_AGAIN)
|
729 |
errno = EAGAIN; |
730 |
else
|
731 |
errno = EIO; |
732 |
ret = -1;
|
733 |
} |
734 |
} else
|
735 |
#endif /* CONFIG_VNC_TLS */ |
736 |
ret = recv(vs->csock, buffer_end(&vs->input), 4096, 0); |
737 |
ret = vnc_client_io_error(vs, ret, socket_error()); |
738 |
if (!ret)
|
739 |
return;
|
740 |
|
741 |
vs->input.offset += ret; |
742 |
|
743 |
while (vs->read_handler && vs->input.offset >= vs->read_handler_expect) {
|
744 |
size_t len = vs->read_handler_expect; |
745 |
int ret;
|
746 |
|
747 |
ret = vs->read_handler(vs, vs->input.buffer, len); |
748 |
if (vs->csock == -1) |
749 |
return;
|
750 |
|
751 |
if (!ret) {
|
752 |
memmove(vs->input.buffer, vs->input.buffer + len, (vs->input.offset - len)); |
753 |
vs->input.offset -= len; |
754 |
} else {
|
755 |
vs->read_handler_expect = ret; |
756 |
} |
757 |
} |
758 |
} |
759 |
|
760 |
static void vnc_write(VncState *vs, const void *data, size_t len) |
761 |
{ |
762 |
buffer_reserve(&vs->output, len); |
763 |
|
764 |
if (buffer_empty(&vs->output)) {
|
765 |
qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, vnc_client_write, vs);
|
766 |
} |
767 |
|
768 |
buffer_append(&vs->output, data, len); |
769 |
} |
770 |
|
771 |
static void vnc_write_s32(VncState *vs, int32_t value) |
772 |
{ |
773 |
vnc_write_u32(vs, *(uint32_t *)&value); |
774 |
} |
775 |
|
776 |
static void vnc_write_u32(VncState *vs, uint32_t value) |
777 |
{ |
778 |
uint8_t buf[4];
|
779 |
|
780 |
buf[0] = (value >> 24) & 0xFF; |
781 |
buf[1] = (value >> 16) & 0xFF; |
782 |
buf[2] = (value >> 8) & 0xFF; |
783 |
buf[3] = value & 0xFF; |
784 |
|
785 |
vnc_write(vs, buf, 4);
|
786 |
} |
787 |
|
788 |
static void vnc_write_u16(VncState *vs, uint16_t value) |
789 |
{ |
790 |
uint8_t buf[2];
|
791 |
|
792 |
buf[0] = (value >> 8) & 0xFF; |
793 |
buf[1] = value & 0xFF; |
794 |
|
795 |
vnc_write(vs, buf, 2);
|
796 |
} |
797 |
|
798 |
static void vnc_write_u8(VncState *vs, uint8_t value) |
799 |
{ |
800 |
vnc_write(vs, (char *)&value, 1); |
801 |
} |
802 |
|
803 |
static void vnc_flush(VncState *vs) |
804 |
{ |
805 |
if (vs->output.offset)
|
806 |
vnc_client_write(vs); |
807 |
} |
808 |
|
809 |
static uint8_t read_u8(uint8_t *data, size_t offset)
|
810 |
{ |
811 |
return data[offset];
|
812 |
} |
813 |
|
814 |
static uint16_t read_u16(uint8_t *data, size_t offset)
|
815 |
{ |
816 |
return ((data[offset] & 0xFF) << 8) | (data[offset + 1] & 0xFF); |
817 |
} |
818 |
|
819 |
static int32_t read_s32(uint8_t *data, size_t offset)
|
820 |
{ |
821 |
return (int32_t)((data[offset] << 24) | (data[offset + 1] << 16) | |
822 |
(data[offset + 2] << 8) | data[offset + 3]); |
823 |
} |
824 |
|
825 |
static uint32_t read_u32(uint8_t *data, size_t offset)
|
826 |
{ |
827 |
return ((data[offset] << 24) | (data[offset + 1] << 16) | |
828 |
(data[offset + 2] << 8) | data[offset + 3]); |
829 |
} |
830 |
|
831 |
#if CONFIG_VNC_TLS
|
832 |
static ssize_t vnc_tls_push(gnutls_transport_ptr_t transport,
|
833 |
const void *data, |
834 |
size_t len) { |
835 |
struct VncState *vs = (struct VncState *)transport; |
836 |
int ret;
|
837 |
|
838 |
retry:
|
839 |
ret = send(vs->csock, data, len, 0);
|
840 |
if (ret < 0) { |
841 |
if (errno == EINTR)
|
842 |
goto retry;
|
843 |
return -1; |
844 |
} |
845 |
return ret;
|
846 |
} |
847 |
|
848 |
|
849 |
static ssize_t vnc_tls_pull(gnutls_transport_ptr_t transport,
|
850 |
void *data,
|
851 |
size_t len) { |
852 |
struct VncState *vs = (struct VncState *)transport; |
853 |
int ret;
|
854 |
|
855 |
retry:
|
856 |
ret = recv(vs->csock, data, len, 0);
|
857 |
if (ret < 0) { |
858 |
if (errno == EINTR)
|
859 |
goto retry;
|
860 |
return -1; |
861 |
} |
862 |
return ret;
|
863 |
} |
864 |
#endif /* CONFIG_VNC_TLS */ |
865 |
|
866 |
static void client_cut_text(VncState *vs, size_t len, uint8_t *text) |
867 |
{ |
868 |
} |
869 |
|
870 |
static void check_pointer_type_change(VncState *vs, int absolute) |
871 |
{ |
872 |
if (vs->has_pointer_type_change && vs->absolute != absolute) {
|
873 |
vnc_write_u8(vs, 0);
|
874 |
vnc_write_u8(vs, 0);
|
875 |
vnc_write_u16(vs, 1);
|
876 |
vnc_framebuffer_update(vs, absolute, 0,
|
877 |
vs->ds->width, vs->ds->height, -257);
|
878 |
vnc_flush(vs); |
879 |
} |
880 |
vs->absolute = absolute; |
881 |
} |
882 |
|
883 |
static void pointer_event(VncState *vs, int button_mask, int x, int y) |
884 |
{ |
885 |
int buttons = 0; |
886 |
int dz = 0; |
887 |
|
888 |
if (button_mask & 0x01) |
889 |
buttons |= MOUSE_EVENT_LBUTTON; |
890 |
if (button_mask & 0x02) |
891 |
buttons |= MOUSE_EVENT_MBUTTON; |
892 |
if (button_mask & 0x04) |
893 |
buttons |= MOUSE_EVENT_RBUTTON; |
894 |
if (button_mask & 0x08) |
895 |
dz = -1;
|
896 |
if (button_mask & 0x10) |
897 |
dz = 1;
|
898 |
|
899 |
if (vs->absolute) {
|
900 |
kbd_mouse_event(x * 0x7FFF / (vs->ds->width - 1), |
901 |
y * 0x7FFF / (vs->ds->height - 1), |
902 |
dz, buttons); |
903 |
} else if (vs->has_pointer_type_change) { |
904 |
x -= 0x7FFF;
|
905 |
y -= 0x7FFF;
|
906 |
|
907 |
kbd_mouse_event(x, y, dz, buttons); |
908 |
} else {
|
909 |
if (vs->last_x != -1) |
910 |
kbd_mouse_event(x - vs->last_x, |
911 |
y - vs->last_y, |
912 |
dz, buttons); |
913 |
vs->last_x = x; |
914 |
vs->last_y = y; |
915 |
} |
916 |
|
917 |
check_pointer_type_change(vs, kbd_mouse_is_absolute()); |
918 |
} |
919 |
|
920 |
static void reset_keys(VncState *vs) |
921 |
{ |
922 |
int i;
|
923 |
for(i = 0; i < 256; i++) { |
924 |
if (vs->modifiers_state[i]) {
|
925 |
if (i & 0x80) |
926 |
kbd_put_keycode(0xe0);
|
927 |
kbd_put_keycode(i | 0x80);
|
928 |
vs->modifiers_state[i] = 0;
|
929 |
} |
930 |
} |
931 |
} |
932 |
|
933 |
static void press_key(VncState *vs, int keysym) |
934 |
{ |
935 |
kbd_put_keycode(keysym2scancode(vs->kbd_layout, keysym) & 0x7f);
|
936 |
kbd_put_keycode(keysym2scancode(vs->kbd_layout, keysym) | 0x80);
|
937 |
} |
938 |
|
939 |
static void do_key_event(VncState *vs, int down, uint32_t sym) |
940 |
{ |
941 |
int keycode;
|
942 |
|
943 |
keycode = keysym2scancode(vs->kbd_layout, sym & 0xFFFF);
|
944 |
|
945 |
/* QEMU console switch */
|
946 |
switch(keycode) {
|
947 |
case 0x2a: /* Left Shift */ |
948 |
case 0x36: /* Right Shift */ |
949 |
case 0x1d: /* Left CTRL */ |
950 |
case 0x9d: /* Right CTRL */ |
951 |
case 0x38: /* Left ALT */ |
952 |
case 0xb8: /* Right ALT */ |
953 |
if (down)
|
954 |
vs->modifiers_state[keycode] = 1;
|
955 |
else
|
956 |
vs->modifiers_state[keycode] = 0;
|
957 |
break;
|
958 |
case 0x02 ... 0x0a: /* '1' to '9' keys */ |
959 |
if (down && vs->modifiers_state[0x1d] && vs->modifiers_state[0x38]) { |
960 |
/* Reset the modifiers sent to the current console */
|
961 |
reset_keys(vs); |
962 |
console_select(keycode - 0x02);
|
963 |
return;
|
964 |
} |
965 |
break;
|
966 |
case 0x3a: /* CapsLock */ |
967 |
case 0x45: /* NumLock */ |
968 |
if (!down)
|
969 |
vs->modifiers_state[keycode] ^= 1;
|
970 |
break;
|
971 |
} |
972 |
|
973 |
if (keycode_is_keypad(vs->kbd_layout, keycode)) {
|
974 |
/* If the numlock state needs to change then simulate an additional
|
975 |
keypress before sending this one. This will happen if the user
|
976 |
toggles numlock away from the VNC window.
|
977 |
*/
|
978 |
if (keysym_is_numlock(vs->kbd_layout, sym & 0xFFFF)) { |
979 |
if (!vs->modifiers_state[0x45]) { |
980 |
vs->modifiers_state[0x45] = 1; |
981 |
press_key(vs, 0xff7f);
|
982 |
} |
983 |
} else {
|
984 |
if (vs->modifiers_state[0x45]) { |
985 |
vs->modifiers_state[0x45] = 0; |
986 |
press_key(vs, 0xff7f);
|
987 |
} |
988 |
} |
989 |
} |
990 |
|
991 |
if (is_graphic_console()) {
|
992 |
if (keycode & 0x80) |
993 |
kbd_put_keycode(0xe0);
|
994 |
if (down)
|
995 |
kbd_put_keycode(keycode & 0x7f);
|
996 |
else
|
997 |
kbd_put_keycode(keycode | 0x80);
|
998 |
} else {
|
999 |
/* QEMU console emulation */
|
1000 |
if (down) {
|
1001 |
switch (keycode) {
|
1002 |
case 0x2a: /* Left Shift */ |
1003 |
case 0x36: /* Right Shift */ |
1004 |
case 0x1d: /* Left CTRL */ |
1005 |
case 0x9d: /* Right CTRL */ |
1006 |
case 0x38: /* Left ALT */ |
1007 |
case 0xb8: /* Right ALT */ |
1008 |
break;
|
1009 |
case 0xc8: |
1010 |
kbd_put_keysym(QEMU_KEY_UP); |
1011 |
break;
|
1012 |
case 0xd0: |
1013 |
kbd_put_keysym(QEMU_KEY_DOWN); |
1014 |
break;
|
1015 |
case 0xcb: |
1016 |
kbd_put_keysym(QEMU_KEY_LEFT); |
1017 |
break;
|
1018 |
case 0xcd: |
1019 |
kbd_put_keysym(QEMU_KEY_RIGHT); |
1020 |
break;
|
1021 |
case 0xd3: |
1022 |
kbd_put_keysym(QEMU_KEY_DELETE); |
1023 |
break;
|
1024 |
case 0xc7: |
1025 |
kbd_put_keysym(QEMU_KEY_HOME); |
1026 |
break;
|
1027 |
case 0xcf: |
1028 |
kbd_put_keysym(QEMU_KEY_END); |
1029 |
break;
|
1030 |
case 0xc9: |
1031 |
kbd_put_keysym(QEMU_KEY_PAGEUP); |
1032 |
break;
|
1033 |
case 0xd1: |
1034 |
kbd_put_keysym(QEMU_KEY_PAGEDOWN); |
1035 |
break;
|
1036 |
default:
|
1037 |
kbd_put_keysym(sym); |
1038 |
break;
|
1039 |
} |
1040 |
} |
1041 |
} |
1042 |
} |
1043 |
|
1044 |
static void key_event(VncState *vs, int down, uint32_t sym) |
1045 |
{ |
1046 |
if (sym >= 'A' && sym <= 'Z' && is_graphic_console()) |
1047 |
sym = sym - 'A' + 'a'; |
1048 |
do_key_event(vs, down, sym); |
1049 |
} |
1050 |
|
1051 |
static void framebuffer_update_request(VncState *vs, int incremental, |
1052 |
int x_position, int y_position, |
1053 |
int w, int h) |
1054 |
{ |
1055 |
if (x_position > vs->ds->width)
|
1056 |
x_position = vs->ds->width; |
1057 |
if (y_position > vs->ds->height)
|
1058 |
y_position = vs->ds->height; |
1059 |
if (x_position + w >= vs->ds->width)
|
1060 |
w = vs->ds->width - x_position; |
1061 |
if (y_position + h >= vs->ds->height)
|
1062 |
h = vs->ds->height - y_position; |
1063 |
|
1064 |
int i;
|
1065 |
vs->need_update = 1;
|
1066 |
if (!incremental) {
|
1067 |
char *old_row = vs->old_data + y_position * vs->ds->linesize;
|
1068 |
|
1069 |
for (i = 0; i < h; i++) { |
1070 |
vnc_set_bits(vs->dirty_row[y_position + i], |
1071 |
(vs->ds->width / 16), VNC_DIRTY_WORDS);
|
1072 |
memset(old_row, 42, vs->ds->width * vs->depth);
|
1073 |
old_row += vs->ds->linesize; |
1074 |
} |
1075 |
} |
1076 |
} |
1077 |
|
1078 |
static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings) |
1079 |
{ |
1080 |
int i;
|
1081 |
|
1082 |
vs->has_hextile = 0;
|
1083 |
vs->has_resize = 0;
|
1084 |
vs->has_pointer_type_change = 0;
|
1085 |
vs->absolute = -1;
|
1086 |
vs->ds->dpy_copy = NULL;
|
1087 |
|
1088 |
for (i = n_encodings - 1; i >= 0; i--) { |
1089 |
switch (encodings[i]) {
|
1090 |
case 0: /* Raw */ |
1091 |
vs->has_hextile = 0;
|
1092 |
break;
|
1093 |
case 1: /* CopyRect */ |
1094 |
vs->ds->dpy_copy = vnc_copy; |
1095 |
break;
|
1096 |
case 5: /* Hextile */ |
1097 |
vs->has_hextile = 1;
|
1098 |
break;
|
1099 |
case -223: /* DesktopResize */ |
1100 |
vs->has_resize = 1;
|
1101 |
break;
|
1102 |
case -257: |
1103 |
vs->has_pointer_type_change = 1;
|
1104 |
break;
|
1105 |
default:
|
1106 |
break;
|
1107 |
} |
1108 |
} |
1109 |
|
1110 |
check_pointer_type_change(vs, kbd_mouse_is_absolute()); |
1111 |
} |
1112 |
|
1113 |
static int compute_nbits(unsigned int val) |
1114 |
{ |
1115 |
int n;
|
1116 |
n = 0;
|
1117 |
while (val != 0) { |
1118 |
n++; |
1119 |
val >>= 1;
|
1120 |
} |
1121 |
return n;
|
1122 |
} |
1123 |
|
1124 |
static void set_pixel_format(VncState *vs, |
1125 |
int bits_per_pixel, int depth, |
1126 |
int big_endian_flag, int true_color_flag, |
1127 |
int red_max, int green_max, int blue_max, |
1128 |
int red_shift, int green_shift, int blue_shift) |
1129 |
{ |
1130 |
int host_big_endian_flag;
|
1131 |
|
1132 |
#ifdef WORDS_BIGENDIAN
|
1133 |
host_big_endian_flag = 1;
|
1134 |
#else
|
1135 |
host_big_endian_flag = 0;
|
1136 |
#endif
|
1137 |
if (!true_color_flag) {
|
1138 |
fail:
|
1139 |
vnc_client_error(vs); |
1140 |
return;
|
1141 |
} |
1142 |
if (bits_per_pixel == 32 && |
1143 |
host_big_endian_flag == big_endian_flag && |
1144 |
red_max == 0xff && green_max == 0xff && blue_max == 0xff && |
1145 |
red_shift == 16 && green_shift == 8 && blue_shift == 0) { |
1146 |
vs->depth = 4;
|
1147 |
vs->write_pixels = vnc_write_pixels_copy; |
1148 |
vs->send_hextile_tile = send_hextile_tile_32; |
1149 |
} else
|
1150 |
if (bits_per_pixel == 16 && |
1151 |
host_big_endian_flag == big_endian_flag && |
1152 |
red_max == 31 && green_max == 63 && blue_max == 31 && |
1153 |
red_shift == 11 && green_shift == 5 && blue_shift == 0) { |
1154 |
vs->depth = 2;
|
1155 |
vs->write_pixels = vnc_write_pixels_copy; |
1156 |
vs->send_hextile_tile = send_hextile_tile_16; |
1157 |
} else
|
1158 |
if (bits_per_pixel == 8 && |
1159 |
red_max == 7 && green_max == 7 && blue_max == 3 && |
1160 |
red_shift == 5 && green_shift == 2 && blue_shift == 0) { |
1161 |
vs->depth = 1;
|
1162 |
vs->write_pixels = vnc_write_pixels_copy; |
1163 |
vs->send_hextile_tile = send_hextile_tile_8; |
1164 |
} else
|
1165 |
{ |
1166 |
/* generic and slower case */
|
1167 |
if (bits_per_pixel != 8 && |
1168 |
bits_per_pixel != 16 &&
|
1169 |
bits_per_pixel != 32)
|
1170 |
goto fail;
|
1171 |
vs->depth = 4;
|
1172 |
vs->red_shift = red_shift; |
1173 |
vs->red_max = red_max; |
1174 |
vs->red_shift1 = 24 - compute_nbits(red_max);
|
1175 |
vs->green_shift = green_shift; |
1176 |
vs->green_max = green_max; |
1177 |
vs->green_shift1 = 16 - compute_nbits(green_max);
|
1178 |
vs->blue_shift = blue_shift; |
1179 |
vs->blue_max = blue_max; |
1180 |
vs->blue_shift1 = 8 - compute_nbits(blue_max);
|
1181 |
vs->pix_bpp = bits_per_pixel / 8;
|
1182 |
vs->pix_big_endian = big_endian_flag; |
1183 |
vs->write_pixels = vnc_write_pixels_generic; |
1184 |
vs->send_hextile_tile = send_hextile_tile_generic; |
1185 |
} |
1186 |
|
1187 |
vnc_dpy_resize(vs->ds, vs->ds->width, vs->ds->height); |
1188 |
|
1189 |
vga_hw_invalidate(); |
1190 |
vga_hw_update(); |
1191 |
} |
1192 |
|
1193 |
static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len) |
1194 |
{ |
1195 |
int i;
|
1196 |
uint16_t limit; |
1197 |
|
1198 |
switch (data[0]) { |
1199 |
case 0: |
1200 |
if (len == 1) |
1201 |
return 20; |
1202 |
|
1203 |
set_pixel_format(vs, read_u8(data, 4), read_u8(data, 5), |
1204 |
read_u8(data, 6), read_u8(data, 7), |
1205 |
read_u16(data, 8), read_u16(data, 10), |
1206 |
read_u16(data, 12), read_u8(data, 14), |
1207 |
read_u8(data, 15), read_u8(data, 16)); |
1208 |
break;
|
1209 |
case 2: |
1210 |
if (len == 1) |
1211 |
return 4; |
1212 |
|
1213 |
if (len == 4) |
1214 |
return 4 + (read_u16(data, 2) * 4); |
1215 |
|
1216 |
limit = read_u16(data, 2);
|
1217 |
for (i = 0; i < limit; i++) { |
1218 |
int32_t val = read_s32(data, 4 + (i * 4)); |
1219 |
memcpy(data + 4 + (i * 4), &val, sizeof(val)); |
1220 |
} |
1221 |
|
1222 |
set_encodings(vs, (int32_t *)(data + 4), limit);
|
1223 |
break;
|
1224 |
case 3: |
1225 |
if (len == 1) |
1226 |
return 10; |
1227 |
|
1228 |
framebuffer_update_request(vs, |
1229 |
read_u8(data, 1), read_u16(data, 2), read_u16(data, 4), |
1230 |
read_u16(data, 6), read_u16(data, 8)); |
1231 |
break;
|
1232 |
case 4: |
1233 |
if (len == 1) |
1234 |
return 8; |
1235 |
|
1236 |
key_event(vs, read_u8(data, 1), read_u32(data, 4)); |
1237 |
break;
|
1238 |
case 5: |
1239 |
if (len == 1) |
1240 |
return 6; |
1241 |
|
1242 |
pointer_event(vs, read_u8(data, 1), read_u16(data, 2), read_u16(data, 4)); |
1243 |
break;
|
1244 |
case 6: |
1245 |
if (len == 1) |
1246 |
return 8; |
1247 |
|
1248 |
if (len == 8) { |
1249 |
uint32_t dlen = read_u32(data, 4);
|
1250 |
if (dlen > 0) |
1251 |
return 8 + dlen; |
1252 |
} |
1253 |
|
1254 |
client_cut_text(vs, read_u32(data, 4), data + 8); |
1255 |
break;
|
1256 |
default:
|
1257 |
printf("Msg: %d\n", data[0]); |
1258 |
vnc_client_error(vs); |
1259 |
break;
|
1260 |
} |
1261 |
|
1262 |
vnc_read_when(vs, protocol_client_msg, 1);
|
1263 |
return 0; |
1264 |
} |
1265 |
|
1266 |
static int protocol_client_init(VncState *vs, uint8_t *data, size_t len) |
1267 |
{ |
1268 |
char pad[3] = { 0, 0, 0 }; |
1269 |
char buf[1024]; |
1270 |
int size;
|
1271 |
|
1272 |
vs->width = vs->ds->width; |
1273 |
vs->height = vs->ds->height; |
1274 |
vnc_write_u16(vs, vs->ds->width); |
1275 |
vnc_write_u16(vs, vs->ds->height); |
1276 |
|
1277 |
vnc_write_u8(vs, vs->depth * 8); /* bits-per-pixel */ |
1278 |
vnc_write_u8(vs, vs->depth * 8); /* depth */ |
1279 |
#ifdef WORDS_BIGENDIAN
|
1280 |
vnc_write_u8(vs, 1); /* big-endian-flag */ |
1281 |
#else
|
1282 |
vnc_write_u8(vs, 0); /* big-endian-flag */ |
1283 |
#endif
|
1284 |
vnc_write_u8(vs, 1); /* true-color-flag */ |
1285 |
if (vs->depth == 4) { |
1286 |
vnc_write_u16(vs, 0xFF); /* red-max */ |
1287 |
vnc_write_u16(vs, 0xFF); /* green-max */ |
1288 |
vnc_write_u16(vs, 0xFF); /* blue-max */ |
1289 |
vnc_write_u8(vs, 16); /* red-shift */ |
1290 |
vnc_write_u8(vs, 8); /* green-shift */ |
1291 |
vnc_write_u8(vs, 0); /* blue-shift */ |
1292 |
vs->send_hextile_tile = send_hextile_tile_32; |
1293 |
} else if (vs->depth == 2) { |
1294 |
vnc_write_u16(vs, 31); /* red-max */ |
1295 |
vnc_write_u16(vs, 63); /* green-max */ |
1296 |
vnc_write_u16(vs, 31); /* blue-max */ |
1297 |
vnc_write_u8(vs, 11); /* red-shift */ |
1298 |
vnc_write_u8(vs, 5); /* green-shift */ |
1299 |
vnc_write_u8(vs, 0); /* blue-shift */ |
1300 |
vs->send_hextile_tile = send_hextile_tile_16; |
1301 |
} else if (vs->depth == 1) { |
1302 |
/* XXX: change QEMU pixel 8 bit pixel format to match the VNC one ? */
|
1303 |
vnc_write_u16(vs, 7); /* red-max */ |
1304 |
vnc_write_u16(vs, 7); /* green-max */ |
1305 |
vnc_write_u16(vs, 3); /* blue-max */ |
1306 |
vnc_write_u8(vs, 5); /* red-shift */ |
1307 |
vnc_write_u8(vs, 2); /* green-shift */ |
1308 |
vnc_write_u8(vs, 0); /* blue-shift */ |
1309 |
vs->send_hextile_tile = send_hextile_tile_8; |
1310 |
} |
1311 |
vs->write_pixels = vnc_write_pixels_copy; |
1312 |
|
1313 |
vnc_write(vs, pad, 3); /* padding */ |
1314 |
|
1315 |
if (qemu_name)
|
1316 |
size = snprintf(buf, sizeof(buf), "QEMU (%s)", qemu_name); |
1317 |
else
|
1318 |
size = snprintf(buf, sizeof(buf), "QEMU"); |
1319 |
|
1320 |
vnc_write_u32(vs, size); |
1321 |
vnc_write(vs, buf, size); |
1322 |
vnc_flush(vs); |
1323 |
|
1324 |
vnc_read_when(vs, protocol_client_msg, 1);
|
1325 |
|
1326 |
return 0; |
1327 |
} |
1328 |
|
1329 |
static void make_challenge(VncState *vs) |
1330 |
{ |
1331 |
int i;
|
1332 |
|
1333 |
srand(time(NULL)+getpid()+getpid()*987654+rand()); |
1334 |
|
1335 |
for (i = 0 ; i < sizeof(vs->challenge) ; i++) |
1336 |
vs->challenge[i] = (int) (256.0*rand()/(RAND_MAX+1.0)); |
1337 |
} |
1338 |
|
1339 |
static int protocol_client_auth_vnc(VncState *vs, uint8_t *data, size_t len) |
1340 |
{ |
1341 |
unsigned char response[VNC_AUTH_CHALLENGE_SIZE]; |
1342 |
int i, j, pwlen;
|
1343 |
unsigned char key[8]; |
1344 |
|
1345 |
if (!vs->password || !vs->password[0]) { |
1346 |
VNC_DEBUG("No password configured on server");
|
1347 |
vnc_write_u32(vs, 1); /* Reject auth */ |
1348 |
if (vs->minor >= 8) { |
1349 |
static const char err[] = "Authentication failed"; |
1350 |
vnc_write_u32(vs, sizeof(err));
|
1351 |
vnc_write(vs, err, sizeof(err));
|
1352 |
} |
1353 |
vnc_flush(vs); |
1354 |
vnc_client_error(vs); |
1355 |
return 0; |
1356 |
} |
1357 |
|
1358 |
memcpy(response, vs->challenge, VNC_AUTH_CHALLENGE_SIZE); |
1359 |
|
1360 |
/* Calculate the expected challenge response */
|
1361 |
pwlen = strlen(vs->password); |
1362 |
for (i=0; i<sizeof(key); i++) |
1363 |
key[i] = i<pwlen ? vs->password[i] : 0;
|
1364 |
deskey(key, EN0); |
1365 |
for (j = 0; j < VNC_AUTH_CHALLENGE_SIZE; j += 8) |
1366 |
des(response+j, response+j); |
1367 |
|
1368 |
/* Compare expected vs actual challenge response */
|
1369 |
if (memcmp(response, data, VNC_AUTH_CHALLENGE_SIZE) != 0) { |
1370 |
VNC_DEBUG("Client challenge reponse did not match\n");
|
1371 |
vnc_write_u32(vs, 1); /* Reject auth */ |
1372 |
if (vs->minor >= 8) { |
1373 |
static const char err[] = "Authentication failed"; |
1374 |
vnc_write_u32(vs, sizeof(err));
|
1375 |
vnc_write(vs, err, sizeof(err));
|
1376 |
} |
1377 |
vnc_flush(vs); |
1378 |
vnc_client_error(vs); |
1379 |
} else {
|
1380 |
VNC_DEBUG("Accepting VNC challenge response\n");
|
1381 |
vnc_write_u32(vs, 0); /* Accept auth */ |
1382 |
vnc_flush(vs); |
1383 |
|
1384 |
vnc_read_when(vs, protocol_client_init, 1);
|
1385 |
} |
1386 |
return 0; |
1387 |
} |
1388 |
|
1389 |
static int start_auth_vnc(VncState *vs) |
1390 |
{ |
1391 |
make_challenge(vs); |
1392 |
/* Send client a 'random' challenge */
|
1393 |
vnc_write(vs, vs->challenge, sizeof(vs->challenge));
|
1394 |
vnc_flush(vs); |
1395 |
|
1396 |
vnc_read_when(vs, protocol_client_auth_vnc, sizeof(vs->challenge));
|
1397 |
return 0; |
1398 |
} |
1399 |
|
1400 |
|
1401 |
#if CONFIG_VNC_TLS
|
1402 |
#define DH_BITS 1024 |
1403 |
static gnutls_dh_params_t dh_params;
|
1404 |
|
1405 |
static int vnc_tls_initialize(void) |
1406 |
{ |
1407 |
static int tlsinitialized = 0; |
1408 |
|
1409 |
if (tlsinitialized)
|
1410 |
return 1; |
1411 |
|
1412 |
if (gnutls_global_init () < 0) |
1413 |
return 0; |
1414 |
|
1415 |
/* XXX ought to re-generate diffie-hellmen params periodically */
|
1416 |
if (gnutls_dh_params_init (&dh_params) < 0) |
1417 |
return 0; |
1418 |
if (gnutls_dh_params_generate2 (dh_params, DH_BITS) < 0) |
1419 |
return 0; |
1420 |
|
1421 |
#if _VNC_DEBUG == 2 |
1422 |
gnutls_global_set_log_level(10);
|
1423 |
gnutls_global_set_log_function(vnc_debug_gnutls_log); |
1424 |
#endif
|
1425 |
|
1426 |
tlsinitialized = 1;
|
1427 |
|
1428 |
return 1; |
1429 |
} |
1430 |
|
1431 |
static gnutls_anon_server_credentials vnc_tls_initialize_anon_cred(void) |
1432 |
{ |
1433 |
gnutls_anon_server_credentials anon_cred; |
1434 |
int ret;
|
1435 |
|
1436 |
if ((ret = gnutls_anon_allocate_server_credentials(&anon_cred)) < 0) { |
1437 |
VNC_DEBUG("Cannot allocate credentials %s\n", gnutls_strerror(ret));
|
1438 |
return NULL; |
1439 |
} |
1440 |
|
1441 |
gnutls_anon_set_server_dh_params(anon_cred, dh_params); |
1442 |
|
1443 |
return anon_cred;
|
1444 |
} |
1445 |
|
1446 |
|
1447 |
static gnutls_certificate_credentials_t vnc_tls_initialize_x509_cred(VncState *vs)
|
1448 |
{ |
1449 |
gnutls_certificate_credentials_t x509_cred; |
1450 |
int ret;
|
1451 |
|
1452 |
if (!vs->x509cacert) {
|
1453 |
VNC_DEBUG("No CA x509 certificate specified\n");
|
1454 |
return NULL; |
1455 |
} |
1456 |
if (!vs->x509cert) {
|
1457 |
VNC_DEBUG("No server x509 certificate specified\n");
|
1458 |
return NULL; |
1459 |
} |
1460 |
if (!vs->x509key) {
|
1461 |
VNC_DEBUG("No server private key specified\n");
|
1462 |
return NULL; |
1463 |
} |
1464 |
|
1465 |
if ((ret = gnutls_certificate_allocate_credentials(&x509_cred)) < 0) { |
1466 |
VNC_DEBUG("Cannot allocate credentials %s\n", gnutls_strerror(ret));
|
1467 |
return NULL; |
1468 |
} |
1469 |
if ((ret = gnutls_certificate_set_x509_trust_file(x509_cred,
|
1470 |
vs->x509cacert, |
1471 |
GNUTLS_X509_FMT_PEM)) < 0) {
|
1472 |
VNC_DEBUG("Cannot load CA certificate %s\n", gnutls_strerror(ret));
|
1473 |
gnutls_certificate_free_credentials(x509_cred); |
1474 |
return NULL; |
1475 |
} |
1476 |
|
1477 |
if ((ret = gnutls_certificate_set_x509_key_file (x509_cred,
|
1478 |
vs->x509cert, |
1479 |
vs->x509key, |
1480 |
GNUTLS_X509_FMT_PEM)) < 0) {
|
1481 |
VNC_DEBUG("Cannot load certificate & key %s\n", gnutls_strerror(ret));
|
1482 |
gnutls_certificate_free_credentials(x509_cred); |
1483 |
return NULL; |
1484 |
} |
1485 |
|
1486 |
if (vs->x509cacrl) {
|
1487 |
if ((ret = gnutls_certificate_set_x509_crl_file(x509_cred,
|
1488 |
vs->x509cacrl, |
1489 |
GNUTLS_X509_FMT_PEM)) < 0) {
|
1490 |
VNC_DEBUG("Cannot load CRL %s\n", gnutls_strerror(ret));
|
1491 |
gnutls_certificate_free_credentials(x509_cred); |
1492 |
return NULL; |
1493 |
} |
1494 |
} |
1495 |
|
1496 |
gnutls_certificate_set_dh_params (x509_cred, dh_params); |
1497 |
|
1498 |
return x509_cred;
|
1499 |
} |
1500 |
|
1501 |
static int vnc_validate_certificate(struct VncState *vs) |
1502 |
{ |
1503 |
int ret;
|
1504 |
unsigned int status; |
1505 |
const gnutls_datum_t *certs;
|
1506 |
unsigned int nCerts, i; |
1507 |
time_t now; |
1508 |
|
1509 |
VNC_DEBUG("Validating client certificate\n");
|
1510 |
if ((ret = gnutls_certificate_verify_peers2 (vs->tls_session, &status)) < 0) { |
1511 |
VNC_DEBUG("Verify failed %s\n", gnutls_strerror(ret));
|
1512 |
return -1; |
1513 |
} |
1514 |
|
1515 |
if ((now = time(NULL)) == ((time_t)-1)) { |
1516 |
return -1; |
1517 |
} |
1518 |
|
1519 |
if (status != 0) { |
1520 |
if (status & GNUTLS_CERT_INVALID)
|
1521 |
VNC_DEBUG("The certificate is not trusted.\n");
|
1522 |
|
1523 |
if (status & GNUTLS_CERT_SIGNER_NOT_FOUND)
|
1524 |
VNC_DEBUG("The certificate hasn't got a known issuer.\n");
|
1525 |
|
1526 |
if (status & GNUTLS_CERT_REVOKED)
|
1527 |
VNC_DEBUG("The certificate has been revoked.\n");
|
1528 |
|
1529 |
if (status & GNUTLS_CERT_INSECURE_ALGORITHM)
|
1530 |
VNC_DEBUG("The certificate uses an insecure algorithm\n");
|
1531 |
|
1532 |
return -1; |
1533 |
} else {
|
1534 |
VNC_DEBUG("Certificate is valid!\n");
|
1535 |
} |
1536 |
|
1537 |
/* Only support x509 for now */
|
1538 |
if (gnutls_certificate_type_get(vs->tls_session) != GNUTLS_CRT_X509)
|
1539 |
return -1; |
1540 |
|
1541 |
if (!(certs = gnutls_certificate_get_peers(vs->tls_session, &nCerts)))
|
1542 |
return -1; |
1543 |
|
1544 |
for (i = 0 ; i < nCerts ; i++) { |
1545 |
gnutls_x509_crt_t cert; |
1546 |
VNC_DEBUG ("Checking certificate chain %d\n", i);
|
1547 |
if (gnutls_x509_crt_init (&cert) < 0) |
1548 |
return -1; |
1549 |
|
1550 |
if (gnutls_x509_crt_import(cert, &certs[i], GNUTLS_X509_FMT_DER) < 0) { |
1551 |
gnutls_x509_crt_deinit (cert); |
1552 |
return -1; |
1553 |
} |
1554 |
|
1555 |
if (gnutls_x509_crt_get_expiration_time (cert) < now) {
|
1556 |
VNC_DEBUG("The certificate has expired\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 |
if (gnutls_x509_crt_get_activation_time (cert) > now) {
|
1568 |
VNC_DEBUG("The certificate is not yet activated\n");
|
1569 |
gnutls_x509_crt_deinit (cert); |
1570 |
return -1; |
1571 |
} |
1572 |
|
1573 |
gnutls_x509_crt_deinit (cert); |
1574 |
} |
1575 |
|
1576 |
return 0; |
1577 |
} |
1578 |
|
1579 |
|
1580 |
static int start_auth_vencrypt_subauth(VncState *vs) |
1581 |
{ |
1582 |
switch (vs->subauth) {
|
1583 |
case VNC_AUTH_VENCRYPT_TLSNONE:
|
1584 |
case VNC_AUTH_VENCRYPT_X509NONE:
|
1585 |
VNC_DEBUG("Accept TLS auth none\n");
|
1586 |
vnc_write_u32(vs, 0); /* Accept auth completion */ |
1587 |
vnc_read_when(vs, protocol_client_init, 1);
|
1588 |
break;
|
1589 |
|
1590 |
case VNC_AUTH_VENCRYPT_TLSVNC:
|
1591 |
case VNC_AUTH_VENCRYPT_X509VNC:
|
1592 |
VNC_DEBUG("Start TLS auth VNC\n");
|
1593 |
return start_auth_vnc(vs);
|
1594 |
|
1595 |
default: /* Should not be possible, but just in case */ |
1596 |
VNC_DEBUG("Reject auth %d\n", vs->auth);
|
1597 |
vnc_write_u8(vs, 1);
|
1598 |
if (vs->minor >= 8) { |
1599 |
static const char err[] = "Unsupported authentication type"; |
1600 |
vnc_write_u32(vs, sizeof(err));
|
1601 |
vnc_write(vs, err, sizeof(err));
|
1602 |
} |
1603 |
vnc_client_error(vs); |
1604 |
} |
1605 |
|
1606 |
return 0; |
1607 |
} |
1608 |
|
1609 |
static void vnc_handshake_io(void *opaque); |
1610 |
|
1611 |
static int vnc_continue_handshake(struct VncState *vs) { |
1612 |
int ret;
|
1613 |
|
1614 |
if ((ret = gnutls_handshake(vs->tls_session)) < 0) { |
1615 |
if (!gnutls_error_is_fatal(ret)) {
|
1616 |
VNC_DEBUG("Handshake interrupted (blocking)\n");
|
1617 |
if (!gnutls_record_get_direction(vs->tls_session))
|
1618 |
qemu_set_fd_handler(vs->csock, vnc_handshake_io, NULL, vs);
|
1619 |
else
|
1620 |
qemu_set_fd_handler(vs->csock, NULL, vnc_handshake_io, vs);
|
1621 |
return 0; |
1622 |
} |
1623 |
VNC_DEBUG("Handshake failed %s\n", gnutls_strerror(ret));
|
1624 |
vnc_client_error(vs); |
1625 |
return -1; |
1626 |
} |
1627 |
|
1628 |
if (vs->x509verify) {
|
1629 |
if (vnc_validate_certificate(vs) < 0) { |
1630 |
VNC_DEBUG("Client verification failed\n");
|
1631 |
vnc_client_error(vs); |
1632 |
return -1; |
1633 |
} else {
|
1634 |
VNC_DEBUG("Client verification passed\n");
|
1635 |
} |
1636 |
} |
1637 |
|
1638 |
VNC_DEBUG("Handshake done, switching to TLS data mode\n");
|
1639 |
vs->wiremode = VNC_WIREMODE_TLS; |
1640 |
qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, vnc_client_write, vs);
|
1641 |
|
1642 |
return start_auth_vencrypt_subauth(vs);
|
1643 |
} |
1644 |
|
1645 |
static void vnc_handshake_io(void *opaque) { |
1646 |
struct VncState *vs = (struct VncState *)opaque; |
1647 |
|
1648 |
VNC_DEBUG("Handshake IO continue\n");
|
1649 |
vnc_continue_handshake(vs); |
1650 |
} |
1651 |
|
1652 |
#define NEED_X509_AUTH(vs) \
|
1653 |
((vs)->subauth == VNC_AUTH_VENCRYPT_X509NONE || \ |
1654 |
(vs)->subauth == VNC_AUTH_VENCRYPT_X509VNC || \ |
1655 |
(vs)->subauth == VNC_AUTH_VENCRYPT_X509PLAIN) |
1656 |
|
1657 |
|
1658 |
static int vnc_start_tls(struct VncState *vs) { |
1659 |
static const int cert_type_priority[] = { GNUTLS_CRT_X509, 0 }; |
1660 |
static const int protocol_priority[]= { GNUTLS_TLS1_1, GNUTLS_TLS1_0, GNUTLS_SSL3, 0 }; |
1661 |
static const int kx_anon[] = {GNUTLS_KX_ANON_DH, 0}; |
1662 |
static const int kx_x509[] = {GNUTLS_KX_DHE_DSS, GNUTLS_KX_RSA, GNUTLS_KX_DHE_RSA, GNUTLS_KX_SRP, 0}; |
1663 |
|
1664 |
VNC_DEBUG("Do TLS setup\n");
|
1665 |
if (vnc_tls_initialize() < 0) { |
1666 |
VNC_DEBUG("Failed to init TLS\n");
|
1667 |
vnc_client_error(vs); |
1668 |
return -1; |
1669 |
} |
1670 |
if (vs->tls_session == NULL) { |
1671 |
if (gnutls_init(&vs->tls_session, GNUTLS_SERVER) < 0) { |
1672 |
vnc_client_error(vs); |
1673 |
return -1; |
1674 |
} |
1675 |
|
1676 |
if (gnutls_set_default_priority(vs->tls_session) < 0) { |
1677 |
gnutls_deinit(vs->tls_session); |
1678 |
vs->tls_session = NULL;
|
1679 |
vnc_client_error(vs); |
1680 |
return -1; |
1681 |
} |
1682 |
|
1683 |
if (gnutls_kx_set_priority(vs->tls_session, NEED_X509_AUTH(vs) ? kx_x509 : kx_anon) < 0) { |
1684 |
gnutls_deinit(vs->tls_session); |
1685 |
vs->tls_session = NULL;
|
1686 |
vnc_client_error(vs); |
1687 |
return -1; |
1688 |
} |
1689 |
|
1690 |
if (gnutls_certificate_type_set_priority(vs->tls_session, cert_type_priority) < 0) { |
1691 |
gnutls_deinit(vs->tls_session); |
1692 |
vs->tls_session = NULL;
|
1693 |
vnc_client_error(vs); |
1694 |
return -1; |
1695 |
} |
1696 |
|
1697 |
if (gnutls_protocol_set_priority(vs->tls_session, protocol_priority) < 0) { |
1698 |
gnutls_deinit(vs->tls_session); |
1699 |
vs->tls_session = NULL;
|
1700 |
vnc_client_error(vs); |
1701 |
return -1; |
1702 |
} |
1703 |
|
1704 |
if (NEED_X509_AUTH(vs)) {
|
1705 |
gnutls_certificate_server_credentials x509_cred = vnc_tls_initialize_x509_cred(vs); |
1706 |
if (!x509_cred) {
|
1707 |
gnutls_deinit(vs->tls_session); |
1708 |
vs->tls_session = NULL;
|
1709 |
vnc_client_error(vs); |
1710 |
return -1; |
1711 |
} |
1712 |
if (gnutls_credentials_set(vs->tls_session, GNUTLS_CRD_CERTIFICATE, x509_cred) < 0) { |
1713 |
gnutls_deinit(vs->tls_session); |
1714 |
vs->tls_session = NULL;
|
1715 |
gnutls_certificate_free_credentials(x509_cred); |
1716 |
vnc_client_error(vs); |
1717 |
return -1; |
1718 |
} |
1719 |
if (vs->x509verify) {
|
1720 |
VNC_DEBUG("Requesting a client certificate\n");
|
1721 |
gnutls_certificate_server_set_request (vs->tls_session, GNUTLS_CERT_REQUEST); |
1722 |
} |
1723 |
|
1724 |
} else {
|
1725 |
gnutls_anon_server_credentials anon_cred = vnc_tls_initialize_anon_cred(); |
1726 |
if (!anon_cred) {
|
1727 |
gnutls_deinit(vs->tls_session); |
1728 |
vs->tls_session = NULL;
|
1729 |
vnc_client_error(vs); |
1730 |
return -1; |
1731 |
} |
1732 |
if (gnutls_credentials_set(vs->tls_session, GNUTLS_CRD_ANON, anon_cred) < 0) { |
1733 |
gnutls_deinit(vs->tls_session); |
1734 |
vs->tls_session = NULL;
|
1735 |
gnutls_anon_free_server_credentials(anon_cred); |
1736 |
vnc_client_error(vs); |
1737 |
return -1; |
1738 |
} |
1739 |
} |
1740 |
|
1741 |
gnutls_transport_set_ptr(vs->tls_session, (gnutls_transport_ptr_t)vs); |
1742 |
gnutls_transport_set_push_function(vs->tls_session, vnc_tls_push); |
1743 |
gnutls_transport_set_pull_function(vs->tls_session, vnc_tls_pull); |
1744 |
} |
1745 |
|
1746 |
VNC_DEBUG("Start TLS handshake process\n");
|
1747 |
return vnc_continue_handshake(vs);
|
1748 |
} |
1749 |
|
1750 |
static int protocol_client_vencrypt_auth(VncState *vs, uint8_t *data, size_t len) |
1751 |
{ |
1752 |
int auth = read_u32(data, 0); |
1753 |
|
1754 |
if (auth != vs->subauth) {
|
1755 |
VNC_DEBUG("Rejecting auth %d\n", auth);
|
1756 |
vnc_write_u8(vs, 0); /* Reject auth */ |
1757 |
vnc_flush(vs); |
1758 |
vnc_client_error(vs); |
1759 |
} else {
|
1760 |
VNC_DEBUG("Accepting auth %d, starting handshake\n", auth);
|
1761 |
vnc_write_u8(vs, 1); /* Accept auth */ |
1762 |
vnc_flush(vs); |
1763 |
|
1764 |
if (vnc_start_tls(vs) < 0) { |
1765 |
VNC_DEBUG("Failed to complete TLS\n");
|
1766 |
return 0; |
1767 |
} |
1768 |
|
1769 |
if (vs->wiremode == VNC_WIREMODE_TLS) {
|
1770 |
VNC_DEBUG("Starting VeNCrypt subauth\n");
|
1771 |
return start_auth_vencrypt_subauth(vs);
|
1772 |
} else {
|
1773 |
VNC_DEBUG("TLS handshake blocked\n");
|
1774 |
return 0; |
1775 |
} |
1776 |
} |
1777 |
return 0; |
1778 |
} |
1779 |
|
1780 |
static int protocol_client_vencrypt_init(VncState *vs, uint8_t *data, size_t len) |
1781 |
{ |
1782 |
if (data[0] != 0 || |
1783 |
data[1] != 2) { |
1784 |
VNC_DEBUG("Unsupported VeNCrypt protocol %d.%d\n", (int)data[0], (int)data[1]); |
1785 |
vnc_write_u8(vs, 1); /* Reject version */ |
1786 |
vnc_flush(vs); |
1787 |
vnc_client_error(vs); |
1788 |
} else {
|
1789 |
VNC_DEBUG("Sending allowed auth %d\n", vs->subauth);
|
1790 |
vnc_write_u8(vs, 0); /* Accept version */ |
1791 |
vnc_write_u8(vs, 1); /* Number of sub-auths */ |
1792 |
vnc_write_u32(vs, vs->subauth); /* The supported auth */
|
1793 |
vnc_flush(vs); |
1794 |
vnc_read_when(vs, protocol_client_vencrypt_auth, 4);
|
1795 |
} |
1796 |
return 0; |
1797 |
} |
1798 |
|
1799 |
static int start_auth_vencrypt(VncState *vs) |
1800 |
{ |
1801 |
/* Send VeNCrypt version 0.2 */
|
1802 |
vnc_write_u8(vs, 0);
|
1803 |
vnc_write_u8(vs, 2);
|
1804 |
|
1805 |
vnc_read_when(vs, protocol_client_vencrypt_init, 2);
|
1806 |
return 0; |
1807 |
} |
1808 |
#endif /* CONFIG_VNC_TLS */ |
1809 |
|
1810 |
static int protocol_client_auth(VncState *vs, uint8_t *data, size_t len) |
1811 |
{ |
1812 |
/* We only advertise 1 auth scheme at a time, so client
|
1813 |
* must pick the one we sent. Verify this */
|
1814 |
if (data[0] != vs->auth) { /* Reject auth */ |
1815 |
VNC_DEBUG("Reject auth %d\n", (int)data[0]); |
1816 |
vnc_write_u32(vs, 1);
|
1817 |
if (vs->minor >= 8) { |
1818 |
static const char err[] = "Authentication failed"; |
1819 |
vnc_write_u32(vs, sizeof(err));
|
1820 |
vnc_write(vs, err, sizeof(err));
|
1821 |
} |
1822 |
vnc_client_error(vs); |
1823 |
} else { /* Accept requested auth */ |
1824 |
VNC_DEBUG("Client requested auth %d\n", (int)data[0]); |
1825 |
switch (vs->auth) {
|
1826 |
case VNC_AUTH_NONE:
|
1827 |
VNC_DEBUG("Accept auth none\n");
|
1828 |
if (vs->minor >= 8) { |
1829 |
vnc_write_u32(vs, 0); /* Accept auth completion */ |
1830 |
vnc_flush(vs); |
1831 |
} |
1832 |
vnc_read_when(vs, protocol_client_init, 1);
|
1833 |
break;
|
1834 |
|
1835 |
case VNC_AUTH_VNC:
|
1836 |
VNC_DEBUG("Start VNC auth\n");
|
1837 |
return start_auth_vnc(vs);
|
1838 |
|
1839 |
#if CONFIG_VNC_TLS
|
1840 |
case VNC_AUTH_VENCRYPT:
|
1841 |
VNC_DEBUG("Accept VeNCrypt auth\n");;
|
1842 |
return start_auth_vencrypt(vs);
|
1843 |
#endif /* CONFIG_VNC_TLS */ |
1844 |
|
1845 |
default: /* Should not be possible, but just in case */ |
1846 |
VNC_DEBUG("Reject auth %d\n", vs->auth);
|
1847 |
vnc_write_u8(vs, 1);
|
1848 |
if (vs->minor >= 8) { |
1849 |
static const char err[] = "Authentication failed"; |
1850 |
vnc_write_u32(vs, sizeof(err));
|
1851 |
vnc_write(vs, err, sizeof(err));
|
1852 |
} |
1853 |
vnc_client_error(vs); |
1854 |
} |
1855 |
} |
1856 |
return 0; |
1857 |
} |
1858 |
|
1859 |
static int protocol_version(VncState *vs, uint8_t *version, size_t len) |
1860 |
{ |
1861 |
char local[13]; |
1862 |
|
1863 |
memcpy(local, version, 12);
|
1864 |
local[12] = 0; |
1865 |
|
1866 |
if (sscanf(local, "RFB %03d.%03d\n", &vs->major, &vs->minor) != 2) { |
1867 |
VNC_DEBUG("Malformed protocol version %s\n", local);
|
1868 |
vnc_client_error(vs); |
1869 |
return 0; |
1870 |
} |
1871 |
VNC_DEBUG("Client request protocol version %d.%d\n", vs->major, vs->minor);
|
1872 |
if (vs->major != 3 || |
1873 |
(vs->minor != 3 &&
|
1874 |
vs->minor != 4 &&
|
1875 |
vs->minor != 5 &&
|
1876 |
vs->minor != 7 &&
|
1877 |
vs->minor != 8)) {
|
1878 |
VNC_DEBUG("Unsupported client version\n");
|
1879 |
vnc_write_u32(vs, VNC_AUTH_INVALID); |
1880 |
vnc_flush(vs); |
1881 |
vnc_client_error(vs); |
1882 |
return 0; |
1883 |
} |
1884 |
/* Some broken clients report v3.4 or v3.5, which spec requires to be treated
|
1885 |
* as equivalent to v3.3 by servers
|
1886 |
*/
|
1887 |
if (vs->minor == 4 || vs->minor == 5) |
1888 |
vs->minor = 3;
|
1889 |
|
1890 |
if (vs->minor == 3) { |
1891 |
if (vs->auth == VNC_AUTH_NONE) {
|
1892 |
VNC_DEBUG("Tell client auth none\n");
|
1893 |
vnc_write_u32(vs, vs->auth); |
1894 |
vnc_flush(vs); |
1895 |
vnc_read_when(vs, protocol_client_init, 1);
|
1896 |
} else if (vs->auth == VNC_AUTH_VNC) { |
1897 |
VNC_DEBUG("Tell client VNC auth\n");
|
1898 |
vnc_write_u32(vs, vs->auth); |
1899 |
vnc_flush(vs); |
1900 |
start_auth_vnc(vs); |
1901 |
} else {
|
1902 |
VNC_DEBUG("Unsupported auth %d for protocol 3.3\n", vs->auth);
|
1903 |
vnc_write_u32(vs, VNC_AUTH_INVALID); |
1904 |
vnc_flush(vs); |
1905 |
vnc_client_error(vs); |
1906 |
} |
1907 |
} else {
|
1908 |
VNC_DEBUG("Telling client we support auth %d\n", vs->auth);
|
1909 |
vnc_write_u8(vs, 1); /* num auth */ |
1910 |
vnc_write_u8(vs, vs->auth); |
1911 |
vnc_read_when(vs, protocol_client_auth, 1);
|
1912 |
vnc_flush(vs); |
1913 |
} |
1914 |
|
1915 |
return 0; |
1916 |
} |
1917 |
|
1918 |
static void vnc_connect(VncState *vs) |
1919 |
{ |
1920 |
VNC_DEBUG("New client on socket %d\n", vs->csock);
|
1921 |
socket_set_nonblock(vs->csock); |
1922 |
qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs); |
1923 |
vnc_write(vs, "RFB 003.008\n", 12); |
1924 |
vnc_flush(vs); |
1925 |
vnc_read_when(vs, protocol_version, 12);
|
1926 |
memset(vs->old_data, 0, vs->ds->linesize * vs->ds->height);
|
1927 |
memset(vs->dirty_row, 0xFF, sizeof(vs->dirty_row)); |
1928 |
vs->has_resize = 0;
|
1929 |
vs->has_hextile = 0;
|
1930 |
vs->ds->dpy_copy = NULL;
|
1931 |
vnc_update_client(vs); |
1932 |
} |
1933 |
|
1934 |
static void vnc_listen_read(void *opaque) |
1935 |
{ |
1936 |
VncState *vs = opaque; |
1937 |
struct sockaddr_in addr;
|
1938 |
socklen_t addrlen = sizeof(addr);
|
1939 |
|
1940 |
/* Catch-up */
|
1941 |
vga_hw_update(); |
1942 |
|
1943 |
vs->csock = accept(vs->lsock, (struct sockaddr *)&addr, &addrlen);
|
1944 |
if (vs->csock != -1) { |
1945 |
vnc_connect(vs); |
1946 |
} |
1947 |
} |
1948 |
|
1949 |
extern int parse_host_port(struct sockaddr_in *saddr, const char *str); |
1950 |
|
1951 |
void vnc_display_init(DisplayState *ds)
|
1952 |
{ |
1953 |
VncState *vs; |
1954 |
|
1955 |
vs = qemu_mallocz(sizeof(VncState));
|
1956 |
if (!vs)
|
1957 |
exit(1);
|
1958 |
|
1959 |
ds->opaque = vs; |
1960 |
vnc_state = vs; |
1961 |
vs->display = NULL;
|
1962 |
vs->password = NULL;
|
1963 |
|
1964 |
vs->lsock = -1;
|
1965 |
vs->csock = -1;
|
1966 |
vs->depth = 4;
|
1967 |
vs->last_x = -1;
|
1968 |
vs->last_y = -1;
|
1969 |
|
1970 |
vs->ds = ds; |
1971 |
|
1972 |
if (!keyboard_layout)
|
1973 |
keyboard_layout = "en-us";
|
1974 |
|
1975 |
vs->kbd_layout = init_keyboard_layout(keyboard_layout); |
1976 |
if (!vs->kbd_layout)
|
1977 |
exit(1);
|
1978 |
|
1979 |
vs->timer = qemu_new_timer(rt_clock, vnc_update_client, vs); |
1980 |
|
1981 |
vs->ds->data = NULL;
|
1982 |
vs->ds->dpy_update = vnc_dpy_update; |
1983 |
vs->ds->dpy_resize = vnc_dpy_resize; |
1984 |
vs->ds->dpy_refresh = NULL;
|
1985 |
|
1986 |
vnc_dpy_resize(vs->ds, 640, 400); |
1987 |
} |
1988 |
|
1989 |
#if CONFIG_VNC_TLS
|
1990 |
static int vnc_set_x509_credential(VncState *vs, |
1991 |
const char *certdir, |
1992 |
const char *filename, |
1993 |
char **cred,
|
1994 |
int ignoreMissing)
|
1995 |
{ |
1996 |
struct stat sb;
|
1997 |
|
1998 |
if (*cred) {
|
1999 |
qemu_free(*cred); |
2000 |
*cred = NULL;
|
2001 |
} |
2002 |
|
2003 |
if (!(*cred = qemu_malloc(strlen(certdir) + strlen(filename) + 2))) |
2004 |
return -1; |
2005 |
|
2006 |
strcpy(*cred, certdir); |
2007 |
strcat(*cred, "/");
|
2008 |
strcat(*cred, filename); |
2009 |
|
2010 |
VNC_DEBUG("Check %s\n", *cred);
|
2011 |
if (stat(*cred, &sb) < 0) { |
2012 |
qemu_free(*cred); |
2013 |
*cred = NULL;
|
2014 |
if (ignoreMissing && errno == ENOENT)
|
2015 |
return 0; |
2016 |
return -1; |
2017 |
} |
2018 |
|
2019 |
return 0; |
2020 |
} |
2021 |
|
2022 |
static int vnc_set_x509_credential_dir(VncState *vs, |
2023 |
const char *certdir) |
2024 |
{ |
2025 |
if (vnc_set_x509_credential(vs, certdir, X509_CA_CERT_FILE, &vs->x509cacert, 0) < 0) |
2026 |
goto cleanup;
|
2027 |
if (vnc_set_x509_credential(vs, certdir, X509_CA_CRL_FILE, &vs->x509cacrl, 1) < 0) |
2028 |
goto cleanup;
|
2029 |
if (vnc_set_x509_credential(vs, certdir, X509_SERVER_CERT_FILE, &vs->x509cert, 0) < 0) |
2030 |
goto cleanup;
|
2031 |
if (vnc_set_x509_credential(vs, certdir, X509_SERVER_KEY_FILE, &vs->x509key, 0) < 0) |
2032 |
goto cleanup;
|
2033 |
|
2034 |
return 0; |
2035 |
|
2036 |
cleanup:
|
2037 |
qemu_free(vs->x509cacert); |
2038 |
qemu_free(vs->x509cacrl); |
2039 |
qemu_free(vs->x509cert); |
2040 |
qemu_free(vs->x509key); |
2041 |
vs->x509cacert = vs->x509cacrl = vs->x509cert = vs->x509key = NULL;
|
2042 |
return -1; |
2043 |
} |
2044 |
#endif /* CONFIG_VNC_TLS */ |
2045 |
|
2046 |
void vnc_display_close(DisplayState *ds)
|
2047 |
{ |
2048 |
VncState *vs = ds ? (VncState *)ds->opaque : vnc_state; |
2049 |
|
2050 |
if (vs->display) {
|
2051 |
qemu_free(vs->display); |
2052 |
vs->display = NULL;
|
2053 |
} |
2054 |
if (vs->lsock != -1) { |
2055 |
qemu_set_fd_handler2(vs->lsock, NULL, NULL, NULL, NULL); |
2056 |
close(vs->lsock); |
2057 |
vs->lsock = -1;
|
2058 |
} |
2059 |
if (vs->csock != -1) { |
2060 |
qemu_set_fd_handler2(vs->csock, NULL, NULL, NULL, NULL); |
2061 |
closesocket(vs->csock); |
2062 |
vs->csock = -1;
|
2063 |
buffer_reset(&vs->input); |
2064 |
buffer_reset(&vs->output); |
2065 |
vs->need_update = 0;
|
2066 |
#if CONFIG_VNC_TLS
|
2067 |
if (vs->tls_session) {
|
2068 |
gnutls_deinit(vs->tls_session); |
2069 |
vs->tls_session = NULL;
|
2070 |
} |
2071 |
vs->wiremode = VNC_WIREMODE_CLEAR; |
2072 |
#endif /* CONFIG_VNC_TLS */ |
2073 |
} |
2074 |
vs->auth = VNC_AUTH_INVALID; |
2075 |
#if CONFIG_VNC_TLS
|
2076 |
vs->subauth = VNC_AUTH_INVALID; |
2077 |
vs->x509verify = 0;
|
2078 |
#endif
|
2079 |
} |
2080 |
|
2081 |
int vnc_display_password(DisplayState *ds, const char *password) |
2082 |
{ |
2083 |
VncState *vs = ds ? (VncState *)ds->opaque : vnc_state; |
2084 |
|
2085 |
if (vs->password) {
|
2086 |
qemu_free(vs->password); |
2087 |
vs->password = NULL;
|
2088 |
} |
2089 |
if (password && password[0]) { |
2090 |
if (!(vs->password = qemu_strdup(password)))
|
2091 |
return -1; |
2092 |
} |
2093 |
|
2094 |
return 0; |
2095 |
} |
2096 |
|
2097 |
int vnc_display_open(DisplayState *ds, const char *display) |
2098 |
{ |
2099 |
struct sockaddr *addr;
|
2100 |
struct sockaddr_in iaddr;
|
2101 |
#ifndef _WIN32
|
2102 |
struct sockaddr_un uaddr;
|
2103 |
const char *p; |
2104 |
#endif
|
2105 |
int reuse_addr, ret;
|
2106 |
socklen_t addrlen; |
2107 |
VncState *vs = ds ? (VncState *)ds->opaque : vnc_state; |
2108 |
const char *options; |
2109 |
int password = 0; |
2110 |
int reverse = 0; |
2111 |
#if CONFIG_VNC_TLS
|
2112 |
int tls = 0, x509 = 0; |
2113 |
#endif
|
2114 |
|
2115 |
vnc_display_close(ds); |
2116 |
if (strcmp(display, "none") == 0) |
2117 |
return 0; |
2118 |
|
2119 |
if (!(vs->display = strdup(display)))
|
2120 |
return -1; |
2121 |
|
2122 |
options = display; |
2123 |
while ((options = strchr(options, ','))) { |
2124 |
options++; |
2125 |
if (strncmp(options, "password", 8) == 0) { |
2126 |
password = 1; /* Require password auth */ |
2127 |
} else if (strncmp(options, "reverse", 7) == 0) { |
2128 |
reverse = 1;
|
2129 |
#if CONFIG_VNC_TLS
|
2130 |
} else if (strncmp(options, "tls", 3) == 0) { |
2131 |
tls = 1; /* Require TLS */ |
2132 |
} else if (strncmp(options, "x509", 4) == 0) { |
2133 |
char *start, *end;
|
2134 |
x509 = 1; /* Require x509 certificates */ |
2135 |
if (strncmp(options, "x509verify", 10) == 0) |
2136 |
vs->x509verify = 1; /* ...and verify client certs */ |
2137 |
|
2138 |
/* Now check for 'x509=/some/path' postfix
|
2139 |
* and use that to setup x509 certificate/key paths */
|
2140 |
start = strchr(options, '=');
|
2141 |
end = strchr(options, ',');
|
2142 |
if (start && (!end || (start < end))) {
|
2143 |
int len = end ? end-(start+1) : strlen(start+1); |
2144 |
char *path = qemu_malloc(len+1); |
2145 |
strncpy(path, start+1, len);
|
2146 |
path[len] = '\0';
|
2147 |
VNC_DEBUG("Trying certificate path '%s'\n", path);
|
2148 |
if (vnc_set_x509_credential_dir(vs, path) < 0) { |
2149 |
fprintf(stderr, "Failed to find x509 certificates/keys in %s\n", path);
|
2150 |
qemu_free(path); |
2151 |
qemu_free(vs->display); |
2152 |
vs->display = NULL;
|
2153 |
return -1; |
2154 |
} |
2155 |
qemu_free(path); |
2156 |
} else {
|
2157 |
fprintf(stderr, "No certificate path provided\n");
|
2158 |
qemu_free(vs->display); |
2159 |
vs->display = NULL;
|
2160 |
return -1; |
2161 |
} |
2162 |
#endif
|
2163 |
} |
2164 |
} |
2165 |
|
2166 |
if (password) {
|
2167 |
#if CONFIG_VNC_TLS
|
2168 |
if (tls) {
|
2169 |
vs->auth = VNC_AUTH_VENCRYPT; |
2170 |
if (x509) {
|
2171 |
VNC_DEBUG("Initializing VNC server with x509 password auth\n");
|
2172 |
vs->subauth = VNC_AUTH_VENCRYPT_X509VNC; |
2173 |
} else {
|
2174 |
VNC_DEBUG("Initializing VNC server with TLS password auth\n");
|
2175 |
vs->subauth = VNC_AUTH_VENCRYPT_TLSVNC; |
2176 |
} |
2177 |
} else {
|
2178 |
#endif
|
2179 |
VNC_DEBUG("Initializing VNC server with password auth\n");
|
2180 |
vs->auth = VNC_AUTH_VNC; |
2181 |
#if CONFIG_VNC_TLS
|
2182 |
vs->subauth = VNC_AUTH_INVALID; |
2183 |
} |
2184 |
#endif
|
2185 |
} else {
|
2186 |
#if CONFIG_VNC_TLS
|
2187 |
if (tls) {
|
2188 |
vs->auth = VNC_AUTH_VENCRYPT; |
2189 |
if (x509) {
|
2190 |
VNC_DEBUG("Initializing VNC server with x509 no auth\n");
|
2191 |
vs->subauth = VNC_AUTH_VENCRYPT_X509NONE; |
2192 |
} else {
|
2193 |
VNC_DEBUG("Initializing VNC server with TLS no auth\n");
|
2194 |
vs->subauth = VNC_AUTH_VENCRYPT_TLSNONE; |
2195 |
} |
2196 |
} else {
|
2197 |
#endif
|
2198 |
VNC_DEBUG("Initializing VNC server with no auth\n");
|
2199 |
vs->auth = VNC_AUTH_NONE; |
2200 |
#if CONFIG_VNC_TLS
|
2201 |
vs->subauth = VNC_AUTH_INVALID; |
2202 |
} |
2203 |
#endif
|
2204 |
} |
2205 |
#ifndef _WIN32
|
2206 |
if (strstart(display, "unix:", &p)) { |
2207 |
addr = (struct sockaddr *)&uaddr;
|
2208 |
addrlen = sizeof(uaddr);
|
2209 |
|
2210 |
vs->lsock = socket(PF_UNIX, SOCK_STREAM, 0);
|
2211 |
if (vs->lsock == -1) { |
2212 |
fprintf(stderr, "Could not create socket\n");
|
2213 |
free(vs->display); |
2214 |
vs->display = NULL;
|
2215 |
return -1; |
2216 |
} |
2217 |
|
2218 |
uaddr.sun_family = AF_UNIX; |
2219 |
memset(uaddr.sun_path, 0, 108); |
2220 |
snprintf(uaddr.sun_path, 108, "%s", p); |
2221 |
|
2222 |
if (!reverse) {
|
2223 |
unlink(uaddr.sun_path); |
2224 |
} |
2225 |
} else
|
2226 |
#endif
|
2227 |
{ |
2228 |
addr = (struct sockaddr *)&iaddr;
|
2229 |
addrlen = sizeof(iaddr);
|
2230 |
|
2231 |
if (parse_host_port(&iaddr, display) < 0) { |
2232 |
fprintf(stderr, "Could not parse VNC address\n");
|
2233 |
free(vs->display); |
2234 |
vs->display = NULL;
|
2235 |
return -1; |
2236 |
} |
2237 |
|
2238 |
iaddr.sin_port = htons(ntohs(iaddr.sin_port) + (reverse ? 0 : 5900)); |
2239 |
|
2240 |
vs->lsock = socket(PF_INET, SOCK_STREAM, 0);
|
2241 |
if (vs->lsock == -1) { |
2242 |
fprintf(stderr, "Could not create socket\n");
|
2243 |
free(vs->display); |
2244 |
vs->display = NULL;
|
2245 |
return -1; |
2246 |
} |
2247 |
|
2248 |
reuse_addr = 1;
|
2249 |
ret = setsockopt(vs->lsock, SOL_SOCKET, SO_REUSEADDR, |
2250 |
(const char *)&reuse_addr, sizeof(reuse_addr)); |
2251 |
if (ret == -1) { |
2252 |
fprintf(stderr, "setsockopt() failed\n");
|
2253 |
close(vs->lsock); |
2254 |
vs->lsock = -1;
|
2255 |
free(vs->display); |
2256 |
vs->display = NULL;
|
2257 |
return -1; |
2258 |
} |
2259 |
} |
2260 |
|
2261 |
if (reverse) {
|
2262 |
if (connect(vs->lsock, addr, addrlen) == -1) { |
2263 |
fprintf(stderr, "Connection to VNC client failed\n");
|
2264 |
close(vs->lsock); |
2265 |
vs->lsock = -1;
|
2266 |
free(vs->display); |
2267 |
vs->display = NULL;
|
2268 |
return -1; |
2269 |
} else {
|
2270 |
vs->csock = vs->lsock; |
2271 |
vs->lsock = -1;
|
2272 |
vnc_connect(vs); |
2273 |
return 0; |
2274 |
} |
2275 |
} |
2276 |
|
2277 |
if (bind(vs->lsock, addr, addrlen) == -1) { |
2278 |
fprintf(stderr, "bind() failed\n");
|
2279 |
close(vs->lsock); |
2280 |
vs->lsock = -1;
|
2281 |
free(vs->display); |
2282 |
vs->display = NULL;
|
2283 |
return -1; |
2284 |
} |
2285 |
|
2286 |
if (listen(vs->lsock, 1) == -1) { |
2287 |
fprintf(stderr, "listen() failed\n");
|
2288 |
close(vs->lsock); |
2289 |
vs->lsock = -1;
|
2290 |
free(vs->display); |
2291 |
vs->display = NULL;
|
2292 |
return -1; |
2293 |
} |
2294 |
|
2295 |
return qemu_set_fd_handler2(vs->lsock, vnc_listen_poll, vnc_listen_read, NULL, vs); |
2296 |
} |