![Anthony Liguori](/assets/img/avatar_default.png)
--disable-gfx-check predates VNC server support. It made sense back then because the only thing you could do without SDL was use -nographic mode or similar tricks. Since this is a very advanced mode of operation, gfx-check provided a good safety net for casual users. A casual user is very likely to use VNC to interact with a guest. In fact, it's often frustrating to install QEMU on a server and have to specify disable-gfx-check when you only want to use VNC. This patch eliminates disable-gfx-check and makes SDL behave like every other optional dependency. If SDL is not available, instead of failing ungracefully if no special options are specified, we default to -vnc localhost:0,to=99. When we do default to VNC, we also print a message to tell the user that we've done this include which port we're currently listening on. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2327 lines
67 KiB
C
2327 lines
67 KiB
C
/*
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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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* Copyright (C) 2009 Red Hat, Inc
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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 "vnc.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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#include "acl.h"
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#define VNC_REFRESH_INTERVAL (1000 / 30)
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#include "vnc_keysym.h"
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#include "d3des.h"
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#define count_bits(c, v) { \
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for (c = 0; v; v >>= 1) \
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{ \
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c += v & 1; \
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} \
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}
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static VncDisplay *vnc_display; /* needed for info vnc */
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static DisplayChangeListener *dcl;
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static char *addr_to_string(const char *format,
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struct sockaddr_storage *sa,
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socklen_t salen) {
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char *addr;
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char host[NI_MAXHOST];
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char serv[NI_MAXSERV];
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int err;
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size_t addrlen;
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if ((err = getnameinfo((struct sockaddr *)sa, salen,
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host, sizeof(host),
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serv, sizeof(serv),
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NI_NUMERICHOST | NI_NUMERICSERV)) != 0) {
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VNC_DEBUG("Cannot resolve address %d: %s\n",
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err, gai_strerror(err));
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return NULL;
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}
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/* Enough for the existing format + the 2 vars we're
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* subsituting in. */
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addrlen = strlen(format) + strlen(host) + strlen(serv);
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addr = qemu_malloc(addrlen + 1);
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snprintf(addr, addrlen, format, host, serv);
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addr[addrlen] = '\0';
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return addr;
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}
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char *vnc_socket_local_addr(const char *format, int fd) {
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struct sockaddr_storage sa;
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socklen_t salen;
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salen = sizeof(sa);
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if (getsockname(fd, (struct sockaddr*)&sa, &salen) < 0)
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return NULL;
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return addr_to_string(format, &sa, salen);
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}
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char *vnc_socket_remote_addr(const char *format, int fd) {
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struct sockaddr_storage sa;
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socklen_t salen;
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salen = sizeof(sa);
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if (getpeername(fd, (struct sockaddr*)&sa, &salen) < 0)
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return NULL;
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return addr_to_string(format, &sa, salen);
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}
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static const char *vnc_auth_name(VncDisplay *vd) {
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switch (vd->auth) {
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case VNC_AUTH_INVALID:
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return "invalid";
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case VNC_AUTH_NONE:
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return "none";
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case VNC_AUTH_VNC:
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return "vnc";
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case VNC_AUTH_RA2:
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return "ra2";
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case VNC_AUTH_RA2NE:
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return "ra2ne";
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case VNC_AUTH_TIGHT:
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return "tight";
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case VNC_AUTH_ULTRA:
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return "ultra";
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case VNC_AUTH_TLS:
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return "tls";
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case VNC_AUTH_VENCRYPT:
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#ifdef CONFIG_VNC_TLS
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switch (vd->subauth) {
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case VNC_AUTH_VENCRYPT_PLAIN:
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return "vencrypt+plain";
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case VNC_AUTH_VENCRYPT_TLSNONE:
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return "vencrypt+tls+none";
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case VNC_AUTH_VENCRYPT_TLSVNC:
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return "vencrypt+tls+vnc";
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case VNC_AUTH_VENCRYPT_TLSPLAIN:
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return "vencrypt+tls+plain";
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case VNC_AUTH_VENCRYPT_X509NONE:
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return "vencrypt+x509+none";
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case VNC_AUTH_VENCRYPT_X509VNC:
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return "vencrypt+x509+vnc";
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case VNC_AUTH_VENCRYPT_X509PLAIN:
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return "vencrypt+x509+plain";
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case VNC_AUTH_VENCRYPT_TLSSASL:
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return "vencrypt+tls+sasl";
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case VNC_AUTH_VENCRYPT_X509SASL:
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return "vencrypt+x509+sasl";
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default:
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return "vencrypt";
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}
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#else
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return "vencrypt";
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#endif
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case VNC_AUTH_SASL:
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return "sasl";
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}
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return "unknown";
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}
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static void do_info_vnc_client(Monitor *mon, VncState *client)
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{
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char *clientAddr =
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vnc_socket_remote_addr(" address: %s:%s\n",
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client->csock);
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if (!clientAddr)
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return;
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monitor_printf(mon, "Client:\n");
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monitor_printf(mon, "%s", clientAddr);
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free(clientAddr);
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#ifdef CONFIG_VNC_TLS
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if (client->tls.session &&
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client->tls.dname)
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monitor_printf(mon, " x509 dname: %s\n", client->tls.dname);
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else
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monitor_printf(mon, " x509 dname: none\n");
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#endif
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#ifdef CONFIG_VNC_SASL
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if (client->sasl.conn &&
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client->sasl.username)
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monitor_printf(mon, " username: %s\n", client->sasl.username);
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else
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monitor_printf(mon, " username: none\n");
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#endif
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}
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void do_info_vnc(Monitor *mon)
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{
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if (vnc_display == NULL || vnc_display->display == NULL) {
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monitor_printf(mon, "Server: disabled\n");
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} else {
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char *serverAddr = vnc_socket_local_addr(" address: %s:%s\n",
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vnc_display->lsock);
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if (!serverAddr)
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return;
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monitor_printf(mon, "Server:\n");
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monitor_printf(mon, "%s", serverAddr);
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free(serverAddr);
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monitor_printf(mon, " auth: %s\n", vnc_auth_name(vnc_display));
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if (vnc_display->clients) {
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VncState *client = vnc_display->clients;
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while (client) {
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do_info_vnc_client(mon, client);
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client = client->next;
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}
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} else {
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monitor_printf(mon, "Client: none\n");
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}
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}
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}
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static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
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return (vs->features & (1 << feature));
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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_update_client(void *opaque);
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static void vnc_colordepth(VncState *vs);
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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_update(VncState *vs, int x, int y, int w, int h)
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{
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struct VncSurface *s = &vs->guest;
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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, s->ds->width);
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y = MIN(y, s->ds->height);
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w = MIN(x + w, s->ds->width) - x;
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h = MIN(h, s->ds->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(s->dirty[y], (x + i) / 16);
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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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VncDisplay *vd = ds->opaque;
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VncState *vs = vd->clients;
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while (vs != NULL) {
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vnc_update(vs, x, y, w, h);
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vs = vs->next;
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}
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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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void buffer_reserve(Buffer *buffer, size_t len)
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{
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if ((buffer->capacity - buffer->offset) < len) {
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buffer->capacity += (len + 1024);
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buffer->buffer = qemu_realloc(buffer->buffer, buffer->capacity);
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if (buffer->buffer == NULL) {
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fprintf(stderr, "vnc: out of memory\n");
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exit(1);
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}
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}
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}
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int buffer_empty(Buffer *buffer)
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{
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return buffer->offset == 0;
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}
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uint8_t *buffer_end(Buffer *buffer)
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{
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return buffer->buffer + buffer->offset;
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}
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void buffer_reset(Buffer *buffer)
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{
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buffer->offset = 0;
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}
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void buffer_append(Buffer *buffer, const void *data, size_t len)
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{
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memcpy(buffer->buffer + buffer->offset, data, len);
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buffer->offset += len;
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}
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static void vnc_resize(VncState *vs)
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{
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DisplayState *ds = vs->ds;
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int size_changed;
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/* guest surface */
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if (!vs->guest.ds)
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vs->guest.ds = qemu_mallocz(sizeof(*vs->guest.ds));
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if (ds_get_bytes_per_pixel(ds) != vs->guest.ds->pf.bytes_per_pixel)
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console_color_init(ds);
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vnc_colordepth(vs);
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size_changed = ds_get_width(ds) != vs->guest.ds->width ||
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ds_get_height(ds) != vs->guest.ds->height;
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*(vs->guest.ds) = *(ds->surface);
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if (size_changed) {
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if (vs->csock != -1 && vnc_has_feature(vs, VNC_FEATURE_RESIZE)) {
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vnc_write_u8(vs, 0); /* msg id */
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vnc_write_u8(vs, 0);
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vnc_write_u16(vs, 1); /* number of rects */
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vnc_framebuffer_update(vs, 0, 0, ds_get_width(ds), ds_get_height(ds),
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VNC_ENCODING_DESKTOPRESIZE);
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vnc_flush(vs);
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}
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}
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memset(vs->guest.dirty, 0xFF, sizeof(vs->guest.dirty));
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/* server surface */
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if (!vs->server.ds)
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vs->server.ds = qemu_mallocz(sizeof(*vs->server.ds));
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if (vs->server.ds->data)
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qemu_free(vs->server.ds->data);
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*(vs->server.ds) = *(ds->surface);
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vs->server.ds->data = qemu_mallocz(vs->server.ds->linesize *
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vs->server.ds->height);
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memset(vs->server.dirty, 0xFF, sizeof(vs->guest.dirty));
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}
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static void vnc_dpy_resize(DisplayState *ds)
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{
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VncDisplay *vd = ds->opaque;
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VncState *vs = vd->clients;
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while (vs != NULL) {
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vnc_resize(vs);
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vs = vs->next;
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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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uint8_t r, g, b;
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r = ((((v & vs->server.ds->pf.rmask) >> vs->server.ds->pf.rshift) << vs->clientds.pf.rbits) >>
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vs->server.ds->pf.rbits);
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g = ((((v & vs->server.ds->pf.gmask) >> vs->server.ds->pf.gshift) << vs->clientds.pf.gbits) >>
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vs->server.ds->pf.gbits);
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b = ((((v & vs->server.ds->pf.bmask) >> vs->server.ds->pf.bshift) << vs->clientds.pf.bbits) >>
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vs->server.ds->pf.bbits);
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v = (r << vs->clientds.pf.rshift) |
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(g << vs->clientds.pf.gshift) |
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(b << vs->clientds.pf.bshift);
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switch(vs->clientds.pf.bytes_per_pixel) {
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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->clientds.flags & QEMU_BIG_ENDIAN_FLAG) {
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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->clientds.flags & QEMU_BIG_ENDIAN_FLAG) {
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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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uint8_t buf[4];
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if (vs->server.ds->pf.bytes_per_pixel == 4) {
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uint32_t *pixels = pixels1;
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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->clientds.pf.bytes_per_pixel);
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}
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} else if (vs->server.ds->pf.bytes_per_pixel == 2) {
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uint16_t *pixels = pixels1;
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int n, i;
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n = size >> 1;
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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->clientds.pf.bytes_per_pixel);
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}
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} else if (vs->server.ds->pf.bytes_per_pixel == 1) {
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uint8_t *pixels = pixels1;
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int n, i;
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n = size;
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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->clientds.pf.bytes_per_pixel);
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}
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} else {
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fprintf(stderr, "vnc_write_pixels_generic: VncState color depth not supported\n");
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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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row = vs->server.ds->data + y * ds_get_linesize(vs->ds) + x * ds_get_bytes_per_pixel(vs->ds);
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for (i = 0; i < h; i++) {
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vs->write_pixels(vs, row, w * ds_get_bytes_per_pixel(vs->ds));
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row += ds_get_linesize(vs->ds);
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}
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}
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static void hextile_enc_cord(uint8_t *ptr, int x, int y, int w, int h)
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{
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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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}
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|
|
|
#define BPP 8
|
|
#include "vnchextile.h"
|
|
#undef BPP
|
|
|
|
#define BPP 16
|
|
#include "vnchextile.h"
|
|
#undef BPP
|
|
|
|
#define BPP 32
|
|
#include "vnchextile.h"
|
|
#undef BPP
|
|
|
|
#define GENERIC
|
|
#define BPP 8
|
|
#include "vnchextile.h"
|
|
#undef BPP
|
|
#undef GENERIC
|
|
|
|
#define GENERIC
|
|
#define BPP 16
|
|
#include "vnchextile.h"
|
|
#undef BPP
|
|
#undef GENERIC
|
|
|
|
#define GENERIC
|
|
#define BPP 32
|
|
#include "vnchextile.h"
|
|
#undef BPP
|
|
#undef GENERIC
|
|
|
|
static void send_framebuffer_update_hextile(VncState *vs, int x, int y, int w, int h)
|
|
{
|
|
int i, j;
|
|
int has_fg, has_bg;
|
|
uint8_t *last_fg, *last_bg;
|
|
|
|
last_fg = (uint8_t *) qemu_malloc(vs->server.ds->pf.bytes_per_pixel);
|
|
last_bg = (uint8_t *) qemu_malloc(vs->server.ds->pf.bytes_per_pixel);
|
|
has_fg = has_bg = 0;
|
|
for (j = y; j < (y + h); j += 16) {
|
|
for (i = x; i < (x + w); i += 16) {
|
|
vs->send_hextile_tile(vs, i, j,
|
|
MIN(16, x + w - i), MIN(16, y + h - j),
|
|
last_bg, last_fg, &has_bg, &has_fg);
|
|
}
|
|
}
|
|
free(last_fg);
|
|
free(last_bg);
|
|
|
|
}
|
|
|
|
static void vnc_zlib_init(VncState *vs)
|
|
{
|
|
int i;
|
|
for (i=0; i<(sizeof(vs->zlib_stream) / sizeof(z_stream)); i++)
|
|
vs->zlib_stream[i].opaque = NULL;
|
|
}
|
|
|
|
static void vnc_zlib_start(VncState *vs)
|
|
{
|
|
buffer_reset(&vs->zlib);
|
|
|
|
// make the output buffer be the zlib buffer, so we can compress it later
|
|
vs->zlib_tmp = vs->output;
|
|
vs->output = vs->zlib;
|
|
}
|
|
|
|
static int vnc_zlib_stop(VncState *vs, int stream_id)
|
|
{
|
|
z_streamp zstream = &vs->zlib_stream[stream_id];
|
|
int previous_out;
|
|
|
|
// switch back to normal output/zlib buffers
|
|
vs->zlib = vs->output;
|
|
vs->output = vs->zlib_tmp;
|
|
|
|
// compress the zlib buffer
|
|
|
|
// initialize the stream
|
|
// XXX need one stream per session
|
|
if (zstream->opaque != vs) {
|
|
int err;
|
|
|
|
VNC_DEBUG("VNC: initializing zlib stream %d\n", stream_id);
|
|
VNC_DEBUG("VNC: opaque = %p | vs = %p\n", zstream->opaque, vs);
|
|
zstream->zalloc = Z_NULL;
|
|
zstream->zfree = Z_NULL;
|
|
|
|
err = deflateInit2(zstream, vs->tight_compression, Z_DEFLATED, MAX_WBITS,
|
|
MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY);
|
|
|
|
if (err != Z_OK) {
|
|
fprintf(stderr, "VNC: error initializing zlib\n");
|
|
return -1;
|
|
}
|
|
|
|
zstream->opaque = vs;
|
|
}
|
|
|
|
// XXX what to do if tight_compression changed in between?
|
|
|
|
// reserve memory in output buffer
|
|
buffer_reserve(&vs->output, vs->zlib.offset + 64);
|
|
|
|
// set pointers
|
|
zstream->next_in = vs->zlib.buffer;
|
|
zstream->avail_in = vs->zlib.offset;
|
|
zstream->next_out = vs->output.buffer + vs->output.offset;
|
|
zstream->avail_out = vs->output.capacity - vs->output.offset;
|
|
zstream->data_type = Z_BINARY;
|
|
previous_out = zstream->total_out;
|
|
|
|
// start encoding
|
|
if (deflate(zstream, Z_SYNC_FLUSH) != Z_OK) {
|
|
fprintf(stderr, "VNC: error during zlib compression\n");
|
|
return -1;
|
|
}
|
|
|
|
vs->output.offset = vs->output.capacity - zstream->avail_out;
|
|
return zstream->total_out - previous_out;
|
|
}
|
|
|
|
static void send_framebuffer_update_zlib(VncState *vs, int x, int y, int w, int h)
|
|
{
|
|
int old_offset, new_offset, bytes_written;
|
|
|
|
vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_ZLIB);
|
|
|
|
// remember where we put in the follow-up size
|
|
old_offset = vs->output.offset;
|
|
vnc_write_s32(vs, 0);
|
|
|
|
// compress the stream
|
|
vnc_zlib_start(vs);
|
|
send_framebuffer_update_raw(vs, x, y, w, h);
|
|
bytes_written = vnc_zlib_stop(vs, 0);
|
|
|
|
if (bytes_written == -1)
|
|
return;
|
|
|
|
// hack in the size
|
|
new_offset = vs->output.offset;
|
|
vs->output.offset = old_offset;
|
|
vnc_write_u32(vs, bytes_written);
|
|
vs->output.offset = new_offset;
|
|
}
|
|
|
|
static void send_framebuffer_update(VncState *vs, int x, int y, int w, int h)
|
|
{
|
|
switch(vs->vnc_encoding) {
|
|
case VNC_ENCODING_ZLIB:
|
|
send_framebuffer_update_zlib(vs, x, y, w, h);
|
|
break;
|
|
case VNC_ENCODING_HEXTILE:
|
|
vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_HEXTILE);
|
|
send_framebuffer_update_hextile(vs, x, y, w, h);
|
|
break;
|
|
default:
|
|
vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_RAW);
|
|
send_framebuffer_update_raw(vs, x, y, w, h);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void vnc_copy(VncState *vs, int src_x, int src_y, int dst_x, int dst_y, int w, int h)
|
|
{
|
|
vs->force_update = 1;
|
|
vnc_update_client(vs);
|
|
|
|
vnc_write_u8(vs, 0); /* msg id */
|
|
vnc_write_u8(vs, 0);
|
|
vnc_write_u16(vs, 1); /* number of rects */
|
|
vnc_framebuffer_update(vs, dst_x, dst_y, w, h, VNC_ENCODING_COPYRECT);
|
|
vnc_write_u16(vs, src_x);
|
|
vnc_write_u16(vs, src_y);
|
|
vnc_flush(vs);
|
|
}
|
|
|
|
static void vnc_dpy_copy(DisplayState *ds, int src_x, int src_y, int dst_x, int dst_y, int w, int h)
|
|
{
|
|
VncDisplay *vd = ds->opaque;
|
|
VncState *vs = vd->clients;
|
|
while (vs != NULL) {
|
|
if (vnc_has_feature(vs, VNC_FEATURE_COPYRECT))
|
|
vnc_copy(vs, src_x, src_y, dst_x, dst_y, w, h);
|
|
else /* TODO */
|
|
vnc_update(vs, dst_x, dst_y, w, h);
|
|
vs = vs->next;
|
|
}
|
|
}
|
|
|
|
static int find_and_clear_dirty_height(struct VncSurface *s,
|
|
int y, int last_x, int x)
|
|
{
|
|
int h;
|
|
|
|
for (h = 1; h < (s->ds->height - y); h++) {
|
|
int tmp_x;
|
|
if (!vnc_get_bit(s->dirty[y + h], last_x))
|
|
break;
|
|
for (tmp_x = last_x; tmp_x < x; tmp_x++)
|
|
vnc_clear_bit(s->dirty[y + h], tmp_x);
|
|
}
|
|
|
|
return h;
|
|
}
|
|
|
|
static void vnc_update_client(void *opaque)
|
|
{
|
|
VncState *vs = opaque;
|
|
if (vs->need_update && vs->csock != -1) {
|
|
int y;
|
|
uint8_t *guest_row;
|
|
uint8_t *server_row;
|
|
int cmp_bytes;
|
|
uint32_t width_mask[VNC_DIRTY_WORDS];
|
|
int n_rectangles;
|
|
int saved_offset;
|
|
int has_dirty = 0;
|
|
|
|
if (vs->output.offset && !vs->audio_cap && !vs->force_update) {
|
|
/* kernel send buffers are full -> drop frames to throttle */
|
|
qemu_mod_timer(vs->timer, qemu_get_clock(rt_clock) + VNC_REFRESH_INTERVAL);
|
|
return;
|
|
}
|
|
|
|
vga_hw_update();
|
|
|
|
/*
|
|
* Walk through the guest dirty map.
|
|
* Check and copy modified bits from guest to server surface.
|
|
* Update server dirty map.
|
|
*/
|
|
vnc_set_bits(width_mask, (ds_get_width(vs->ds) / 16), VNC_DIRTY_WORDS);
|
|
cmp_bytes = 16 * ds_get_bytes_per_pixel(vs->ds);
|
|
guest_row = vs->guest.ds->data;
|
|
server_row = vs->server.ds->data;
|
|
for (y = 0; y < vs->guest.ds->height; y++) {
|
|
if (vnc_and_bits(vs->guest.dirty[y], width_mask, VNC_DIRTY_WORDS)) {
|
|
int x;
|
|
uint8_t *guest_ptr;
|
|
uint8_t *server_ptr;
|
|
|
|
guest_ptr = guest_row;
|
|
server_ptr = server_row;
|
|
|
|
for (x = 0; x < vs->guest.ds->width;
|
|
x += 16, guest_ptr += cmp_bytes, server_ptr += cmp_bytes) {
|
|
if (!vnc_get_bit(vs->guest.dirty[y], (x / 16)))
|
|
continue;
|
|
vnc_clear_bit(vs->guest.dirty[y], (x / 16));
|
|
if (memcmp(server_ptr, guest_ptr, cmp_bytes) == 0)
|
|
continue;
|
|
memcpy(server_ptr, guest_ptr, cmp_bytes);
|
|
vnc_set_bit(vs->server.dirty[y], (x / 16));
|
|
has_dirty++;
|
|
}
|
|
}
|
|
guest_row += ds_get_linesize(vs->ds);
|
|
server_row += ds_get_linesize(vs->ds);
|
|
}
|
|
|
|
if (!has_dirty && !vs->audio_cap && !vs->force_update) {
|
|
qemu_mod_timer(vs->timer, qemu_get_clock(rt_clock) + VNC_REFRESH_INTERVAL);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Send screen updates to the vnc client using the server
|
|
* surface and server dirty map. guest surface updates
|
|
* happening in parallel don't disturb us, the next pass will
|
|
* send them to the client.
|
|
*/
|
|
n_rectangles = 0;
|
|
vnc_write_u8(vs, 0); /* msg id */
|
|
vnc_write_u8(vs, 0);
|
|
saved_offset = vs->output.offset;
|
|
vnc_write_u16(vs, 0);
|
|
|
|
for (y = 0; y < vs->server.ds->height; y++) {
|
|
int x;
|
|
int last_x = -1;
|
|
for (x = 0; x < vs->server.ds->width / 16; x++) {
|
|
if (vnc_get_bit(vs->server.dirty[y], x)) {
|
|
if (last_x == -1) {
|
|
last_x = x;
|
|
}
|
|
vnc_clear_bit(vs->server.dirty[y], x);
|
|
} else {
|
|
if (last_x != -1) {
|
|
int h = find_and_clear_dirty_height(&vs->server, y, last_x, x);
|
|
send_framebuffer_update(vs, last_x * 16, y, (x - last_x) * 16, h);
|
|
n_rectangles++;
|
|
}
|
|
last_x = -1;
|
|
}
|
|
}
|
|
if (last_x != -1) {
|
|
int h = find_and_clear_dirty_height(&vs->server, y, last_x, x);
|
|
send_framebuffer_update(vs, last_x * 16, y, (x - last_x) * 16, h);
|
|
n_rectangles++;
|
|
}
|
|
}
|
|
vs->output.buffer[saved_offset] = (n_rectangles >> 8) & 0xFF;
|
|
vs->output.buffer[saved_offset + 1] = n_rectangles & 0xFF;
|
|
vnc_flush(vs);
|
|
vs->force_update = 0;
|
|
|
|
}
|
|
|
|
if (vs->csock != -1) {
|
|
qemu_mod_timer(vs->timer, qemu_get_clock(rt_clock) + VNC_REFRESH_INTERVAL);
|
|
}
|
|
|
|
}
|
|
|
|
/* audio */
|
|
static void audio_capture_notify(void *opaque, audcnotification_e cmd)
|
|
{
|
|
VncState *vs = opaque;
|
|
|
|
switch (cmd) {
|
|
case AUD_CNOTIFY_DISABLE:
|
|
vnc_write_u8(vs, 255);
|
|
vnc_write_u8(vs, 1);
|
|
vnc_write_u16(vs, 0);
|
|
vnc_flush(vs);
|
|
break;
|
|
|
|
case AUD_CNOTIFY_ENABLE:
|
|
vnc_write_u8(vs, 255);
|
|
vnc_write_u8(vs, 1);
|
|
vnc_write_u16(vs, 1);
|
|
vnc_flush(vs);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void audio_capture_destroy(void *opaque)
|
|
{
|
|
}
|
|
|
|
static void audio_capture(void *opaque, void *buf, int size)
|
|
{
|
|
VncState *vs = opaque;
|
|
|
|
vnc_write_u8(vs, 255);
|
|
vnc_write_u8(vs, 1);
|
|
vnc_write_u16(vs, 2);
|
|
vnc_write_u32(vs, size);
|
|
vnc_write(vs, buf, size);
|
|
vnc_flush(vs);
|
|
}
|
|
|
|
static void audio_add(VncState *vs)
|
|
{
|
|
Monitor *mon = cur_mon;
|
|
struct audio_capture_ops ops;
|
|
|
|
if (vs->audio_cap) {
|
|
monitor_printf(mon, "audio already running\n");
|
|
return;
|
|
}
|
|
|
|
ops.notify = audio_capture_notify;
|
|
ops.destroy = audio_capture_destroy;
|
|
ops.capture = audio_capture;
|
|
|
|
vs->audio_cap = AUD_add_capture(&vs->as, &ops, vs);
|
|
if (!vs->audio_cap) {
|
|
monitor_printf(mon, "Failed to add audio capture\n");
|
|
}
|
|
}
|
|
|
|
static void audio_del(VncState *vs)
|
|
{
|
|
if (vs->audio_cap) {
|
|
AUD_del_capture(vs->audio_cap, vs);
|
|
vs->audio_cap = NULL;
|
|
}
|
|
}
|
|
|
|
|
|
int vnc_client_io_error(VncState *vs, int ret, int last_errno)
|
|
{
|
|
if (ret == 0 || ret == -1) {
|
|
if (ret == -1) {
|
|
switch (last_errno) {
|
|
case EINTR:
|
|
case EAGAIN:
|
|
#ifdef _WIN32
|
|
case WSAEWOULDBLOCK:
|
|
#endif
|
|
return 0;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
VNC_DEBUG("Closing down client sock %d %d\n", ret, ret < 0 ? last_errno : 0);
|
|
qemu_set_fd_handler2(vs->csock, NULL, NULL, NULL, NULL);
|
|
closesocket(vs->csock);
|
|
qemu_del_timer(vs->timer);
|
|
qemu_free_timer(vs->timer);
|
|
if (vs->input.buffer) qemu_free(vs->input.buffer);
|
|
if (vs->output.buffer) qemu_free(vs->output.buffer);
|
|
#ifdef CONFIG_VNC_TLS
|
|
vnc_tls_client_cleanup(vs);
|
|
#endif /* CONFIG_VNC_TLS */
|
|
#ifdef CONFIG_VNC_SASL
|
|
vnc_sasl_client_cleanup(vs);
|
|
#endif /* CONFIG_VNC_SASL */
|
|
audio_del(vs);
|
|
|
|
VncState *p, *parent = NULL;
|
|
for (p = vs->vd->clients; p != NULL; p = p->next) {
|
|
if (p == vs) {
|
|
if (parent)
|
|
parent->next = p->next;
|
|
else
|
|
vs->vd->clients = p->next;
|
|
break;
|
|
}
|
|
parent = p;
|
|
}
|
|
if (!vs->vd->clients)
|
|
dcl->idle = 1;
|
|
|
|
qemu_free(vs->server.ds->data);
|
|
qemu_free(vs->server.ds);
|
|
qemu_free(vs->guest.ds);
|
|
qemu_free(vs);
|
|
|
|
return 0;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
void vnc_client_error(VncState *vs)
|
|
{
|
|
vnc_client_io_error(vs, -1, EINVAL);
|
|
}
|
|
|
|
|
|
/*
|
|
* Called to write a chunk of data to the client socket. The data may
|
|
* be the raw data, or may have already been encoded by SASL.
|
|
* The data will be written either straight onto the socket, or
|
|
* written via the GNUTLS wrappers, if TLS/SSL encryption is enabled
|
|
*
|
|
* NB, it is theoretically possible to have 2 layers of encryption,
|
|
* both SASL, and this TLS layer. It is highly unlikely in practice
|
|
* though, since SASL encryption will typically be a no-op if TLS
|
|
* is active
|
|
*
|
|
* Returns the number of bytes written, which may be less than
|
|
* the requested 'datalen' if the socket would block. Returns
|
|
* -1 on error, and disconnects the client socket.
|
|
*/
|
|
long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen)
|
|
{
|
|
long ret;
|
|
#ifdef CONFIG_VNC_TLS
|
|
if (vs->tls.session) {
|
|
ret = gnutls_write(vs->tls.session, data, datalen);
|
|
if (ret < 0) {
|
|
if (ret == GNUTLS_E_AGAIN)
|
|
errno = EAGAIN;
|
|
else
|
|
errno = EIO;
|
|
ret = -1;
|
|
}
|
|
} else
|
|
#endif /* CONFIG_VNC_TLS */
|
|
ret = send(vs->csock, data, datalen, 0);
|
|
VNC_DEBUG("Wrote wire %p %zd -> %ld\n", data, datalen, ret);
|
|
return vnc_client_io_error(vs, ret, socket_error());
|
|
}
|
|
|
|
|
|
/*
|
|
* Called to write buffered data to the client socket, when not
|
|
* using any SASL SSF encryption layers. Will write as much data
|
|
* as possible without blocking. If all buffered data is written,
|
|
* will switch the FD poll() handler back to read monitoring.
|
|
*
|
|
* Returns the number of bytes written, which may be less than
|
|
* the buffered output data if the socket would block. Returns
|
|
* -1 on error, and disconnects the client socket.
|
|
*/
|
|
static long vnc_client_write_plain(VncState *vs)
|
|
{
|
|
long ret;
|
|
|
|
#ifdef CONFIG_VNC_SASL
|
|
VNC_DEBUG("Write Plain: Pending output %p size %zd offset %zd. Wait SSF %d\n",
|
|
vs->output.buffer, vs->output.capacity, vs->output.offset,
|
|
vs->sasl.waitWriteSSF);
|
|
|
|
if (vs->sasl.conn &&
|
|
vs->sasl.runSSF &&
|
|
vs->sasl.waitWriteSSF) {
|
|
ret = vnc_client_write_buf(vs, vs->output.buffer, vs->sasl.waitWriteSSF);
|
|
if (ret)
|
|
vs->sasl.waitWriteSSF -= ret;
|
|
} else
|
|
#endif /* CONFIG_VNC_SASL */
|
|
ret = vnc_client_write_buf(vs, vs->output.buffer, vs->output.offset);
|
|
if (!ret)
|
|
return 0;
|
|
|
|
memmove(vs->output.buffer, vs->output.buffer + ret, (vs->output.offset - ret));
|
|
vs->output.offset -= ret;
|
|
|
|
if (vs->output.offset == 0) {
|
|
qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* First function called whenever there is data to be written to
|
|
* the client socket. Will delegate actual work according to whether
|
|
* SASL SSF layers are enabled (thus requiring encryption calls)
|
|
*/
|
|
void vnc_client_write(void *opaque)
|
|
{
|
|
long ret;
|
|
VncState *vs = opaque;
|
|
|
|
#ifdef CONFIG_VNC_SASL
|
|
if (vs->sasl.conn &&
|
|
vs->sasl.runSSF &&
|
|
!vs->sasl.waitWriteSSF)
|
|
ret = vnc_client_write_sasl(vs);
|
|
else
|
|
#endif /* CONFIG_VNC_SASL */
|
|
ret = vnc_client_write_plain(vs);
|
|
}
|
|
|
|
void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting)
|
|
{
|
|
vs->read_handler = func;
|
|
vs->read_handler_expect = expecting;
|
|
}
|
|
|
|
|
|
/*
|
|
* Called to read a chunk of data from the client socket. The data may
|
|
* be the raw data, or may need to be further decoded by SASL.
|
|
* The data will be read either straight from to the socket, or
|
|
* read via the GNUTLS wrappers, if TLS/SSL encryption is enabled
|
|
*
|
|
* NB, it is theoretically possible to have 2 layers of encryption,
|
|
* both SASL, and this TLS layer. It is highly unlikely in practice
|
|
* though, since SASL encryption will typically be a no-op if TLS
|
|
* is active
|
|
*
|
|
* Returns the number of bytes read, which may be less than
|
|
* the requested 'datalen' if the socket would block. Returns
|
|
* -1 on error, and disconnects the client socket.
|
|
*/
|
|
long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen)
|
|
{
|
|
long ret;
|
|
#ifdef CONFIG_VNC_TLS
|
|
if (vs->tls.session) {
|
|
ret = gnutls_read(vs->tls.session, data, datalen);
|
|
if (ret < 0) {
|
|
if (ret == GNUTLS_E_AGAIN)
|
|
errno = EAGAIN;
|
|
else
|
|
errno = EIO;
|
|
ret = -1;
|
|
}
|
|
} else
|
|
#endif /* CONFIG_VNC_TLS */
|
|
ret = recv(vs->csock, data, datalen, 0);
|
|
VNC_DEBUG("Read wire %p %zd -> %ld\n", data, datalen, ret);
|
|
return vnc_client_io_error(vs, ret, socket_error());
|
|
}
|
|
|
|
|
|
/*
|
|
* Called to read data from the client socket to the input buffer,
|
|
* when not using any SASL SSF encryption layers. Will read as much
|
|
* data as possible without blocking.
|
|
*
|
|
* Returns the number of bytes read. Returns -1 on error, and
|
|
* disconnects the client socket.
|
|
*/
|
|
static long vnc_client_read_plain(VncState *vs)
|
|
{
|
|
int ret;
|
|
VNC_DEBUG("Read plain %p size %zd offset %zd\n",
|
|
vs->input.buffer, vs->input.capacity, vs->input.offset);
|
|
buffer_reserve(&vs->input, 4096);
|
|
ret = vnc_client_read_buf(vs, buffer_end(&vs->input), 4096);
|
|
if (!ret)
|
|
return 0;
|
|
vs->input.offset += ret;
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* First function called whenever there is more data to be read from
|
|
* the client socket. Will delegate actual work according to whether
|
|
* SASL SSF layers are enabled (thus requiring decryption calls)
|
|
*/
|
|
void vnc_client_read(void *opaque)
|
|
{
|
|
VncState *vs = opaque;
|
|
long ret;
|
|
|
|
#ifdef CONFIG_VNC_SASL
|
|
if (vs->sasl.conn && vs->sasl.runSSF)
|
|
ret = vnc_client_read_sasl(vs);
|
|
else
|
|
#endif /* CONFIG_VNC_SASL */
|
|
ret = vnc_client_read_plain(vs);
|
|
if (!ret)
|
|
return;
|
|
|
|
while (vs->read_handler && vs->input.offset >= vs->read_handler_expect) {
|
|
size_t len = vs->read_handler_expect;
|
|
int ret;
|
|
|
|
ret = vs->read_handler(vs, vs->input.buffer, len);
|
|
if (vs->csock == -1)
|
|
return;
|
|
|
|
if (!ret) {
|
|
memmove(vs->input.buffer, vs->input.buffer + len, (vs->input.offset - len));
|
|
vs->input.offset -= len;
|
|
} else {
|
|
vs->read_handler_expect = ret;
|
|
}
|
|
}
|
|
}
|
|
|
|
void vnc_write(VncState *vs, const void *data, size_t len)
|
|
{
|
|
buffer_reserve(&vs->output, len);
|
|
|
|
if (buffer_empty(&vs->output)) {
|
|
qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, vnc_client_write, vs);
|
|
}
|
|
|
|
buffer_append(&vs->output, data, len);
|
|
}
|
|
|
|
void vnc_write_s32(VncState *vs, int32_t value)
|
|
{
|
|
vnc_write_u32(vs, *(uint32_t *)&value);
|
|
}
|
|
|
|
void vnc_write_u32(VncState *vs, uint32_t value)
|
|
{
|
|
uint8_t buf[4];
|
|
|
|
buf[0] = (value >> 24) & 0xFF;
|
|
buf[1] = (value >> 16) & 0xFF;
|
|
buf[2] = (value >> 8) & 0xFF;
|
|
buf[3] = value & 0xFF;
|
|
|
|
vnc_write(vs, buf, 4);
|
|
}
|
|
|
|
void vnc_write_u16(VncState *vs, uint16_t value)
|
|
{
|
|
uint8_t buf[2];
|
|
|
|
buf[0] = (value >> 8) & 0xFF;
|
|
buf[1] = value & 0xFF;
|
|
|
|
vnc_write(vs, buf, 2);
|
|
}
|
|
|
|
void vnc_write_u8(VncState *vs, uint8_t value)
|
|
{
|
|
vnc_write(vs, (char *)&value, 1);
|
|
}
|
|
|
|
void vnc_flush(VncState *vs)
|
|
{
|
|
if (vs->output.offset)
|
|
vnc_client_write(vs);
|
|
}
|
|
|
|
uint8_t read_u8(uint8_t *data, size_t offset)
|
|
{
|
|
return data[offset];
|
|
}
|
|
|
|
uint16_t read_u16(uint8_t *data, size_t offset)
|
|
{
|
|
return ((data[offset] & 0xFF) << 8) | (data[offset + 1] & 0xFF);
|
|
}
|
|
|
|
int32_t read_s32(uint8_t *data, size_t offset)
|
|
{
|
|
return (int32_t)((data[offset] << 24) | (data[offset + 1] << 16) |
|
|
(data[offset + 2] << 8) | data[offset + 3]);
|
|
}
|
|
|
|
uint32_t read_u32(uint8_t *data, size_t offset)
|
|
{
|
|
return ((data[offset] << 24) | (data[offset + 1] << 16) |
|
|
(data[offset + 2] << 8) | data[offset + 3]);
|
|
}
|
|
|
|
static void client_cut_text(VncState *vs, size_t len, uint8_t *text)
|
|
{
|
|
}
|
|
|
|
static void check_pointer_type_change(VncState *vs, int absolute)
|
|
{
|
|
if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE) && vs->absolute != absolute) {
|
|
vnc_write_u8(vs, 0);
|
|
vnc_write_u8(vs, 0);
|
|
vnc_write_u16(vs, 1);
|
|
vnc_framebuffer_update(vs, absolute, 0,
|
|
ds_get_width(vs->ds), ds_get_height(vs->ds),
|
|
VNC_ENCODING_POINTER_TYPE_CHANGE);
|
|
vnc_flush(vs);
|
|
}
|
|
vs->absolute = absolute;
|
|
}
|
|
|
|
static void pointer_event(VncState *vs, int button_mask, int x, int y)
|
|
{
|
|
int buttons = 0;
|
|
int dz = 0;
|
|
|
|
if (button_mask & 0x01)
|
|
buttons |= MOUSE_EVENT_LBUTTON;
|
|
if (button_mask & 0x02)
|
|
buttons |= MOUSE_EVENT_MBUTTON;
|
|
if (button_mask & 0x04)
|
|
buttons |= MOUSE_EVENT_RBUTTON;
|
|
if (button_mask & 0x08)
|
|
dz = -1;
|
|
if (button_mask & 0x10)
|
|
dz = 1;
|
|
|
|
if (vs->absolute) {
|
|
kbd_mouse_event(x * 0x7FFF / (ds_get_width(vs->ds) - 1),
|
|
y * 0x7FFF / (ds_get_height(vs->ds) - 1),
|
|
dz, buttons);
|
|
} else if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE)) {
|
|
x -= 0x7FFF;
|
|
y -= 0x7FFF;
|
|
|
|
kbd_mouse_event(x, y, dz, buttons);
|
|
} else {
|
|
if (vs->last_x != -1)
|
|
kbd_mouse_event(x - vs->last_x,
|
|
y - vs->last_y,
|
|
dz, buttons);
|
|
vs->last_x = x;
|
|
vs->last_y = y;
|
|
}
|
|
|
|
check_pointer_type_change(vs, kbd_mouse_is_absolute());
|
|
}
|
|
|
|
static void reset_keys(VncState *vs)
|
|
{
|
|
int i;
|
|
for(i = 0; i < 256; i++) {
|
|
if (vs->modifiers_state[i]) {
|
|
if (i & 0x80)
|
|
kbd_put_keycode(0xe0);
|
|
kbd_put_keycode(i | 0x80);
|
|
vs->modifiers_state[i] = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void press_key(VncState *vs, int keysym)
|
|
{
|
|
kbd_put_keycode(keysym2scancode(vs->vd->kbd_layout, keysym) & 0x7f);
|
|
kbd_put_keycode(keysym2scancode(vs->vd->kbd_layout, keysym) | 0x80);
|
|
}
|
|
|
|
static void do_key_event(VncState *vs, int down, int keycode, int sym)
|
|
{
|
|
/* QEMU console switch */
|
|
switch(keycode) {
|
|
case 0x2a: /* Left Shift */
|
|
case 0x36: /* Right Shift */
|
|
case 0x1d: /* Left CTRL */
|
|
case 0x9d: /* Right CTRL */
|
|
case 0x38: /* Left ALT */
|
|
case 0xb8: /* Right ALT */
|
|
if (down)
|
|
vs->modifiers_state[keycode] = 1;
|
|
else
|
|
vs->modifiers_state[keycode] = 0;
|
|
break;
|
|
case 0x02 ... 0x0a: /* '1' to '9' keys */
|
|
if (down && vs->modifiers_state[0x1d] && vs->modifiers_state[0x38]) {
|
|
/* Reset the modifiers sent to the current console */
|
|
reset_keys(vs);
|
|
console_select(keycode - 0x02);
|
|
return;
|
|
}
|
|
break;
|
|
case 0x3a: /* CapsLock */
|
|
case 0x45: /* NumLock */
|
|
if (!down)
|
|
vs->modifiers_state[keycode] ^= 1;
|
|
break;
|
|
}
|
|
|
|
if (keycode_is_keypad(vs->vd->kbd_layout, keycode)) {
|
|
/* If the numlock state needs to change then simulate an additional
|
|
keypress before sending this one. This will happen if the user
|
|
toggles numlock away from the VNC window.
|
|
*/
|
|
if (keysym_is_numlock(vs->vd->kbd_layout, sym & 0xFFFF)) {
|
|
if (!vs->modifiers_state[0x45]) {
|
|
vs->modifiers_state[0x45] = 1;
|
|
press_key(vs, 0xff7f);
|
|
}
|
|
} else {
|
|
if (vs->modifiers_state[0x45]) {
|
|
vs->modifiers_state[0x45] = 0;
|
|
press_key(vs, 0xff7f);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (is_graphic_console()) {
|
|
if (keycode & 0x80)
|
|
kbd_put_keycode(0xe0);
|
|
if (down)
|
|
kbd_put_keycode(keycode & 0x7f);
|
|
else
|
|
kbd_put_keycode(keycode | 0x80);
|
|
} else {
|
|
/* QEMU console emulation */
|
|
if (down) {
|
|
switch (keycode) {
|
|
case 0x2a: /* Left Shift */
|
|
case 0x36: /* Right Shift */
|
|
case 0x1d: /* Left CTRL */
|
|
case 0x9d: /* Right CTRL */
|
|
case 0x38: /* Left ALT */
|
|
case 0xb8: /* Right ALT */
|
|
break;
|
|
case 0xc8:
|
|
case 0x48:
|
|
kbd_put_keysym(QEMU_KEY_UP);
|
|
break;
|
|
case 0xd0:
|
|
case 0x50:
|
|
kbd_put_keysym(QEMU_KEY_DOWN);
|
|
break;
|
|
case 0xcb:
|
|
case 0x4b:
|
|
kbd_put_keysym(QEMU_KEY_LEFT);
|
|
break;
|
|
case 0xcd:
|
|
case 0x4d:
|
|
kbd_put_keysym(QEMU_KEY_RIGHT);
|
|
break;
|
|
case 0xd3:
|
|
case 0x53:
|
|
kbd_put_keysym(QEMU_KEY_DELETE);
|
|
break;
|
|
case 0xc7:
|
|
case 0x47:
|
|
kbd_put_keysym(QEMU_KEY_HOME);
|
|
break;
|
|
case 0xcf:
|
|
case 0x4f:
|
|
kbd_put_keysym(QEMU_KEY_END);
|
|
break;
|
|
case 0xc9:
|
|
case 0x49:
|
|
kbd_put_keysym(QEMU_KEY_PAGEUP);
|
|
break;
|
|
case 0xd1:
|
|
case 0x51:
|
|
kbd_put_keysym(QEMU_KEY_PAGEDOWN);
|
|
break;
|
|
default:
|
|
kbd_put_keysym(sym);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void key_event(VncState *vs, int down, uint32_t sym)
|
|
{
|
|
int keycode;
|
|
|
|
if (sym >= 'A' && sym <= 'Z' && is_graphic_console())
|
|
sym = sym - 'A' + 'a';
|
|
|
|
keycode = keysym2scancode(vs->vd->kbd_layout, sym & 0xFFFF);
|
|
do_key_event(vs, down, keycode, sym);
|
|
}
|
|
|
|
static void ext_key_event(VncState *vs, int down,
|
|
uint32_t sym, uint16_t keycode)
|
|
{
|
|
/* if the user specifies a keyboard layout, always use it */
|
|
if (keyboard_layout)
|
|
key_event(vs, down, sym);
|
|
else
|
|
do_key_event(vs, down, keycode, sym);
|
|
}
|
|
|
|
static void framebuffer_update_request(VncState *vs, int incremental,
|
|
int x_position, int y_position,
|
|
int w, int h)
|
|
{
|
|
if (x_position > ds_get_width(vs->ds))
|
|
x_position = ds_get_width(vs->ds);
|
|
if (y_position > ds_get_height(vs->ds))
|
|
y_position = ds_get_height(vs->ds);
|
|
if (x_position + w >= ds_get_width(vs->ds))
|
|
w = ds_get_width(vs->ds) - x_position;
|
|
if (y_position + h >= ds_get_height(vs->ds))
|
|
h = ds_get_height(vs->ds) - y_position;
|
|
|
|
int i;
|
|
vs->need_update = 1;
|
|
if (!incremental) {
|
|
vs->force_update = 1;
|
|
for (i = 0; i < h; i++) {
|
|
vnc_set_bits(vs->guest.dirty[y_position + i],
|
|
(ds_get_width(vs->ds) / 16), VNC_DIRTY_WORDS);
|
|
vnc_set_bits(vs->server.dirty[y_position + i],
|
|
(ds_get_width(vs->ds) / 16), VNC_DIRTY_WORDS);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void send_ext_key_event_ack(VncState *vs)
|
|
{
|
|
vnc_write_u8(vs, 0);
|
|
vnc_write_u8(vs, 0);
|
|
vnc_write_u16(vs, 1);
|
|
vnc_framebuffer_update(vs, 0, 0, ds_get_width(vs->ds), ds_get_height(vs->ds),
|
|
VNC_ENCODING_EXT_KEY_EVENT);
|
|
vnc_flush(vs);
|
|
}
|
|
|
|
static void send_ext_audio_ack(VncState *vs)
|
|
{
|
|
vnc_write_u8(vs, 0);
|
|
vnc_write_u8(vs, 0);
|
|
vnc_write_u16(vs, 1);
|
|
vnc_framebuffer_update(vs, 0, 0, ds_get_width(vs->ds), ds_get_height(vs->ds),
|
|
VNC_ENCODING_AUDIO);
|
|
vnc_flush(vs);
|
|
}
|
|
|
|
static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings)
|
|
{
|
|
int i;
|
|
unsigned int enc = 0;
|
|
|
|
vnc_zlib_init(vs);
|
|
vs->features = 0;
|
|
vs->vnc_encoding = 0;
|
|
vs->tight_compression = 9;
|
|
vs->tight_quality = 9;
|
|
vs->absolute = -1;
|
|
|
|
for (i = n_encodings - 1; i >= 0; i--) {
|
|
enc = encodings[i];
|
|
switch (enc) {
|
|
case VNC_ENCODING_RAW:
|
|
vs->vnc_encoding = enc;
|
|
break;
|
|
case VNC_ENCODING_COPYRECT:
|
|
vs->features |= VNC_FEATURE_COPYRECT_MASK;
|
|
break;
|
|
case VNC_ENCODING_HEXTILE:
|
|
vs->features |= VNC_FEATURE_HEXTILE_MASK;
|
|
vs->vnc_encoding = enc;
|
|
break;
|
|
case VNC_ENCODING_ZLIB:
|
|
vs->features |= VNC_FEATURE_ZLIB_MASK;
|
|
vs->vnc_encoding = enc;
|
|
break;
|
|
case VNC_ENCODING_DESKTOPRESIZE:
|
|
vs->features |= VNC_FEATURE_RESIZE_MASK;
|
|
break;
|
|
case VNC_ENCODING_POINTER_TYPE_CHANGE:
|
|
vs->features |= VNC_FEATURE_POINTER_TYPE_CHANGE_MASK;
|
|
break;
|
|
case VNC_ENCODING_EXT_KEY_EVENT:
|
|
send_ext_key_event_ack(vs);
|
|
break;
|
|
case VNC_ENCODING_AUDIO:
|
|
send_ext_audio_ack(vs);
|
|
break;
|
|
case VNC_ENCODING_WMVi:
|
|
vs->features |= VNC_FEATURE_WMVI_MASK;
|
|
break;
|
|
case VNC_ENCODING_COMPRESSLEVEL0 ... VNC_ENCODING_COMPRESSLEVEL0 + 9:
|
|
vs->tight_compression = (enc & 0x0F);
|
|
break;
|
|
case VNC_ENCODING_QUALITYLEVEL0 ... VNC_ENCODING_QUALITYLEVEL0 + 9:
|
|
vs->tight_quality = (enc & 0x0F);
|
|
break;
|
|
default:
|
|
VNC_DEBUG("Unknown encoding: %d (0x%.8x): %d\n", i, enc, enc);
|
|
break;
|
|
}
|
|
}
|
|
|
|
check_pointer_type_change(vs, kbd_mouse_is_absolute());
|
|
}
|
|
|
|
static void set_pixel_conversion(VncState *vs)
|
|
{
|
|
if ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) ==
|
|
(vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG) &&
|
|
!memcmp(&(vs->clientds.pf), &(vs->ds->surface->pf), sizeof(PixelFormat))) {
|
|
vs->write_pixels = vnc_write_pixels_copy;
|
|
switch (vs->ds->surface->pf.bits_per_pixel) {
|
|
case 8:
|
|
vs->send_hextile_tile = send_hextile_tile_8;
|
|
break;
|
|
case 16:
|
|
vs->send_hextile_tile = send_hextile_tile_16;
|
|
break;
|
|
case 32:
|
|
vs->send_hextile_tile = send_hextile_tile_32;
|
|
break;
|
|
}
|
|
} else {
|
|
vs->write_pixels = vnc_write_pixels_generic;
|
|
switch (vs->ds->surface->pf.bits_per_pixel) {
|
|
case 8:
|
|
vs->send_hextile_tile = send_hextile_tile_generic_8;
|
|
break;
|
|
case 16:
|
|
vs->send_hextile_tile = send_hextile_tile_generic_16;
|
|
break;
|
|
case 32:
|
|
vs->send_hextile_tile = send_hextile_tile_generic_32;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void set_pixel_format(VncState *vs,
|
|
int bits_per_pixel, int depth,
|
|
int big_endian_flag, int true_color_flag,
|
|
int red_max, int green_max, int blue_max,
|
|
int red_shift, int green_shift, int blue_shift)
|
|
{
|
|
if (!true_color_flag) {
|
|
vnc_client_error(vs);
|
|
return;
|
|
}
|
|
|
|
vs->clientds = *(vs->guest.ds);
|
|
vs->clientds.pf.rmax = red_max;
|
|
count_bits(vs->clientds.pf.rbits, red_max);
|
|
vs->clientds.pf.rshift = red_shift;
|
|
vs->clientds.pf.rmask = red_max << red_shift;
|
|
vs->clientds.pf.gmax = green_max;
|
|
count_bits(vs->clientds.pf.gbits, green_max);
|
|
vs->clientds.pf.gshift = green_shift;
|
|
vs->clientds.pf.gmask = green_max << green_shift;
|
|
vs->clientds.pf.bmax = blue_max;
|
|
count_bits(vs->clientds.pf.bbits, blue_max);
|
|
vs->clientds.pf.bshift = blue_shift;
|
|
vs->clientds.pf.bmask = blue_max << blue_shift;
|
|
vs->clientds.pf.bits_per_pixel = bits_per_pixel;
|
|
vs->clientds.pf.bytes_per_pixel = bits_per_pixel / 8;
|
|
vs->clientds.pf.depth = bits_per_pixel == 32 ? 24 : bits_per_pixel;
|
|
vs->clientds.flags = big_endian_flag ? QEMU_BIG_ENDIAN_FLAG : 0x00;
|
|
|
|
set_pixel_conversion(vs);
|
|
|
|
vga_hw_invalidate();
|
|
vga_hw_update();
|
|
}
|
|
|
|
static void pixel_format_message (VncState *vs) {
|
|
char pad[3] = { 0, 0, 0 };
|
|
|
|
vnc_write_u8(vs, vs->ds->surface->pf.bits_per_pixel); /* bits-per-pixel */
|
|
vnc_write_u8(vs, vs->ds->surface->pf.depth); /* depth */
|
|
|
|
#ifdef WORDS_BIGENDIAN
|
|
vnc_write_u8(vs, 1); /* big-endian-flag */
|
|
#else
|
|
vnc_write_u8(vs, 0); /* big-endian-flag */
|
|
#endif
|
|
vnc_write_u8(vs, 1); /* true-color-flag */
|
|
vnc_write_u16(vs, vs->ds->surface->pf.rmax); /* red-max */
|
|
vnc_write_u16(vs, vs->ds->surface->pf.gmax); /* green-max */
|
|
vnc_write_u16(vs, vs->ds->surface->pf.bmax); /* blue-max */
|
|
vnc_write_u8(vs, vs->ds->surface->pf.rshift); /* red-shift */
|
|
vnc_write_u8(vs, vs->ds->surface->pf.gshift); /* green-shift */
|
|
vnc_write_u8(vs, vs->ds->surface->pf.bshift); /* blue-shift */
|
|
if (vs->ds->surface->pf.bits_per_pixel == 32)
|
|
vs->send_hextile_tile = send_hextile_tile_32;
|
|
else if (vs->ds->surface->pf.bits_per_pixel == 16)
|
|
vs->send_hextile_tile = send_hextile_tile_16;
|
|
else if (vs->ds->surface->pf.bits_per_pixel == 8)
|
|
vs->send_hextile_tile = send_hextile_tile_8;
|
|
vs->clientds = *(vs->ds->surface);
|
|
vs->clientds.flags &= ~QEMU_ALLOCATED_FLAG;
|
|
vs->write_pixels = vnc_write_pixels_copy;
|
|
|
|
vnc_write(vs, pad, 3); /* padding */
|
|
}
|
|
|
|
static void vnc_dpy_setdata(DisplayState *ds)
|
|
{
|
|
/* We don't have to do anything */
|
|
}
|
|
|
|
static void vnc_colordepth(VncState *vs)
|
|
{
|
|
if (vnc_has_feature(vs, VNC_FEATURE_WMVI)) {
|
|
/* Sending a WMVi message to notify the client*/
|
|
vnc_write_u8(vs, 0); /* msg id */
|
|
vnc_write_u8(vs, 0);
|
|
vnc_write_u16(vs, 1); /* number of rects */
|
|
vnc_framebuffer_update(vs, 0, 0, ds_get_width(vs->ds),
|
|
ds_get_height(vs->ds), VNC_ENCODING_WMVi);
|
|
pixel_format_message(vs);
|
|
vnc_flush(vs);
|
|
} else {
|
|
set_pixel_conversion(vs);
|
|
}
|
|
}
|
|
|
|
static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len)
|
|
{
|
|
int i;
|
|
uint16_t limit;
|
|
|
|
switch (data[0]) {
|
|
case 0:
|
|
if (len == 1)
|
|
return 20;
|
|
|
|
set_pixel_format(vs, read_u8(data, 4), read_u8(data, 5),
|
|
read_u8(data, 6), read_u8(data, 7),
|
|
read_u16(data, 8), read_u16(data, 10),
|
|
read_u16(data, 12), read_u8(data, 14),
|
|
read_u8(data, 15), read_u8(data, 16));
|
|
break;
|
|
case 2:
|
|
if (len == 1)
|
|
return 4;
|
|
|
|
if (len == 4) {
|
|
limit = read_u16(data, 2);
|
|
if (limit > 0)
|
|
return 4 + (limit * 4);
|
|
} else
|
|
limit = read_u16(data, 2);
|
|
|
|
for (i = 0; i < limit; i++) {
|
|
int32_t val = read_s32(data, 4 + (i * 4));
|
|
memcpy(data + 4 + (i * 4), &val, sizeof(val));
|
|
}
|
|
|
|
set_encodings(vs, (int32_t *)(data + 4), limit);
|
|
break;
|
|
case 3:
|
|
if (len == 1)
|
|
return 10;
|
|
|
|
framebuffer_update_request(vs,
|
|
read_u8(data, 1), read_u16(data, 2), read_u16(data, 4),
|
|
read_u16(data, 6), read_u16(data, 8));
|
|
break;
|
|
case 4:
|
|
if (len == 1)
|
|
return 8;
|
|
|
|
key_event(vs, read_u8(data, 1), read_u32(data, 4));
|
|
break;
|
|
case 5:
|
|
if (len == 1)
|
|
return 6;
|
|
|
|
pointer_event(vs, read_u8(data, 1), read_u16(data, 2), read_u16(data, 4));
|
|
break;
|
|
case 6:
|
|
if (len == 1)
|
|
return 8;
|
|
|
|
if (len == 8) {
|
|
uint32_t dlen = read_u32(data, 4);
|
|
if (dlen > 0)
|
|
return 8 + dlen;
|
|
}
|
|
|
|
client_cut_text(vs, read_u32(data, 4), data + 8);
|
|
break;
|
|
case 255:
|
|
if (len == 1)
|
|
return 2;
|
|
|
|
switch (read_u8(data, 1)) {
|
|
case 0:
|
|
if (len == 2)
|
|
return 12;
|
|
|
|
ext_key_event(vs, read_u16(data, 2),
|
|
read_u32(data, 4), read_u32(data, 8));
|
|
break;
|
|
case 1:
|
|
if (len == 2)
|
|
return 4;
|
|
|
|
switch (read_u16 (data, 2)) {
|
|
case 0:
|
|
audio_add(vs);
|
|
break;
|
|
case 1:
|
|
audio_del(vs);
|
|
break;
|
|
case 2:
|
|
if (len == 4)
|
|
return 10;
|
|
switch (read_u8(data, 4)) {
|
|
case 0: vs->as.fmt = AUD_FMT_U8; break;
|
|
case 1: vs->as.fmt = AUD_FMT_S8; break;
|
|
case 2: vs->as.fmt = AUD_FMT_U16; break;
|
|
case 3: vs->as.fmt = AUD_FMT_S16; break;
|
|
case 4: vs->as.fmt = AUD_FMT_U32; break;
|
|
case 5: vs->as.fmt = AUD_FMT_S32; break;
|
|
default:
|
|
printf("Invalid audio format %d\n", read_u8(data, 4));
|
|
vnc_client_error(vs);
|
|
break;
|
|
}
|
|
vs->as.nchannels = read_u8(data, 5);
|
|
if (vs->as.nchannels != 1 && vs->as.nchannels != 2) {
|
|
printf("Invalid audio channel coount %d\n",
|
|
read_u8(data, 5));
|
|
vnc_client_error(vs);
|
|
break;
|
|
}
|
|
vs->as.freq = read_u32(data, 6);
|
|
break;
|
|
default:
|
|
printf ("Invalid audio message %d\n", read_u8(data, 4));
|
|
vnc_client_error(vs);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
printf("Msg: %d\n", read_u16(data, 0));
|
|
vnc_client_error(vs);
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
printf("Msg: %d\n", data[0]);
|
|
vnc_client_error(vs);
|
|
break;
|
|
}
|
|
|
|
vnc_read_when(vs, protocol_client_msg, 1);
|
|
return 0;
|
|
}
|
|
|
|
static int protocol_client_init(VncState *vs, uint8_t *data, size_t len)
|
|
{
|
|
char buf[1024];
|
|
int size;
|
|
|
|
vnc_write_u16(vs, ds_get_width(vs->ds));
|
|
vnc_write_u16(vs, ds_get_height(vs->ds));
|
|
|
|
pixel_format_message(vs);
|
|
|
|
if (qemu_name)
|
|
size = snprintf(buf, sizeof(buf), "QEMU (%s)", qemu_name);
|
|
else
|
|
size = snprintf(buf, sizeof(buf), "QEMU");
|
|
|
|
vnc_write_u32(vs, size);
|
|
vnc_write(vs, buf, size);
|
|
vnc_flush(vs);
|
|
|
|
vnc_read_when(vs, protocol_client_msg, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void start_client_init(VncState *vs)
|
|
{
|
|
vnc_read_when(vs, protocol_client_init, 1);
|
|
}
|
|
|
|
static void make_challenge(VncState *vs)
|
|
{
|
|
int i;
|
|
|
|
srand(time(NULL)+getpid()+getpid()*987654+rand());
|
|
|
|
for (i = 0 ; i < sizeof(vs->challenge) ; i++)
|
|
vs->challenge[i] = (int) (256.0*rand()/(RAND_MAX+1.0));
|
|
}
|
|
|
|
static int protocol_client_auth_vnc(VncState *vs, uint8_t *data, size_t len)
|
|
{
|
|
unsigned char response[VNC_AUTH_CHALLENGE_SIZE];
|
|
int i, j, pwlen;
|
|
unsigned char key[8];
|
|
|
|
if (!vs->vd->password || !vs->vd->password[0]) {
|
|
VNC_DEBUG("No password configured on server");
|
|
vnc_write_u32(vs, 1); /* Reject auth */
|
|
if (vs->minor >= 8) {
|
|
static const char err[] = "Authentication failed";
|
|
vnc_write_u32(vs, sizeof(err));
|
|
vnc_write(vs, err, sizeof(err));
|
|
}
|
|
vnc_flush(vs);
|
|
vnc_client_error(vs);
|
|
return 0;
|
|
}
|
|
|
|
memcpy(response, vs->challenge, VNC_AUTH_CHALLENGE_SIZE);
|
|
|
|
/* Calculate the expected challenge response */
|
|
pwlen = strlen(vs->vd->password);
|
|
for (i=0; i<sizeof(key); i++)
|
|
key[i] = i<pwlen ? vs->vd->password[i] : 0;
|
|
deskey(key, EN0);
|
|
for (j = 0; j < VNC_AUTH_CHALLENGE_SIZE; j += 8)
|
|
des(response+j, response+j);
|
|
|
|
/* Compare expected vs actual challenge response */
|
|
if (memcmp(response, data, VNC_AUTH_CHALLENGE_SIZE) != 0) {
|
|
VNC_DEBUG("Client challenge reponse did not match\n");
|
|
vnc_write_u32(vs, 1); /* Reject auth */
|
|
if (vs->minor >= 8) {
|
|
static const char err[] = "Authentication failed";
|
|
vnc_write_u32(vs, sizeof(err));
|
|
vnc_write(vs, err, sizeof(err));
|
|
}
|
|
vnc_flush(vs);
|
|
vnc_client_error(vs);
|
|
} else {
|
|
VNC_DEBUG("Accepting VNC challenge response\n");
|
|
vnc_write_u32(vs, 0); /* Accept auth */
|
|
vnc_flush(vs);
|
|
|
|
start_client_init(vs);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void start_auth_vnc(VncState *vs)
|
|
{
|
|
make_challenge(vs);
|
|
/* Send client a 'random' challenge */
|
|
vnc_write(vs, vs->challenge, sizeof(vs->challenge));
|
|
vnc_flush(vs);
|
|
|
|
vnc_read_when(vs, protocol_client_auth_vnc, sizeof(vs->challenge));
|
|
}
|
|
|
|
|
|
static int protocol_client_auth(VncState *vs, uint8_t *data, size_t len)
|
|
{
|
|
/* We only advertise 1 auth scheme at a time, so client
|
|
* must pick the one we sent. Verify this */
|
|
if (data[0] != vs->vd->auth) { /* Reject auth */
|
|
VNC_DEBUG("Reject auth %d because it didn't match advertized\n", (int)data[0]);
|
|
vnc_write_u32(vs, 1);
|
|
if (vs->minor >= 8) {
|
|
static const char err[] = "Authentication failed";
|
|
vnc_write_u32(vs, sizeof(err));
|
|
vnc_write(vs, err, sizeof(err));
|
|
}
|
|
vnc_client_error(vs);
|
|
} else { /* Accept requested auth */
|
|
VNC_DEBUG("Client requested auth %d\n", (int)data[0]);
|
|
switch (vs->vd->auth) {
|
|
case VNC_AUTH_NONE:
|
|
VNC_DEBUG("Accept auth none\n");
|
|
if (vs->minor >= 8) {
|
|
vnc_write_u32(vs, 0); /* Accept auth completion */
|
|
vnc_flush(vs);
|
|
}
|
|
start_client_init(vs);
|
|
break;
|
|
|
|
case VNC_AUTH_VNC:
|
|
VNC_DEBUG("Start VNC auth\n");
|
|
start_auth_vnc(vs);
|
|
break;
|
|
|
|
#ifdef CONFIG_VNC_TLS
|
|
case VNC_AUTH_VENCRYPT:
|
|
VNC_DEBUG("Accept VeNCrypt auth\n");;
|
|
start_auth_vencrypt(vs);
|
|
break;
|
|
#endif /* CONFIG_VNC_TLS */
|
|
|
|
#ifdef CONFIG_VNC_SASL
|
|
case VNC_AUTH_SASL:
|
|
VNC_DEBUG("Accept SASL auth\n");
|
|
start_auth_sasl(vs);
|
|
break;
|
|
#endif /* CONFIG_VNC_SASL */
|
|
|
|
default: /* Should not be possible, but just in case */
|
|
VNC_DEBUG("Reject auth %d server code bug\n", vs->vd->auth);
|
|
vnc_write_u8(vs, 1);
|
|
if (vs->minor >= 8) {
|
|
static const char err[] = "Authentication failed";
|
|
vnc_write_u32(vs, sizeof(err));
|
|
vnc_write(vs, err, sizeof(err));
|
|
}
|
|
vnc_client_error(vs);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int protocol_version(VncState *vs, uint8_t *version, size_t len)
|
|
{
|
|
char local[13];
|
|
|
|
memcpy(local, version, 12);
|
|
local[12] = 0;
|
|
|
|
if (sscanf(local, "RFB %03d.%03d\n", &vs->major, &vs->minor) != 2) {
|
|
VNC_DEBUG("Malformed protocol version %s\n", local);
|
|
vnc_client_error(vs);
|
|
return 0;
|
|
}
|
|
VNC_DEBUG("Client request protocol version %d.%d\n", vs->major, vs->minor);
|
|
if (vs->major != 3 ||
|
|
(vs->minor != 3 &&
|
|
vs->minor != 4 &&
|
|
vs->minor != 5 &&
|
|
vs->minor != 7 &&
|
|
vs->minor != 8)) {
|
|
VNC_DEBUG("Unsupported client version\n");
|
|
vnc_write_u32(vs, VNC_AUTH_INVALID);
|
|
vnc_flush(vs);
|
|
vnc_client_error(vs);
|
|
return 0;
|
|
}
|
|
/* Some broken clients report v3.4 or v3.5, which spec requires to be treated
|
|
* as equivalent to v3.3 by servers
|
|
*/
|
|
if (vs->minor == 4 || vs->minor == 5)
|
|
vs->minor = 3;
|
|
|
|
if (vs->minor == 3) {
|
|
if (vs->vd->auth == VNC_AUTH_NONE) {
|
|
VNC_DEBUG("Tell client auth none\n");
|
|
vnc_write_u32(vs, vs->vd->auth);
|
|
vnc_flush(vs);
|
|
start_client_init(vs);
|
|
} else if (vs->vd->auth == VNC_AUTH_VNC) {
|
|
VNC_DEBUG("Tell client VNC auth\n");
|
|
vnc_write_u32(vs, vs->vd->auth);
|
|
vnc_flush(vs);
|
|
start_auth_vnc(vs);
|
|
} else {
|
|
VNC_DEBUG("Unsupported auth %d for protocol 3.3\n", vs->vd->auth);
|
|
vnc_write_u32(vs, VNC_AUTH_INVALID);
|
|
vnc_flush(vs);
|
|
vnc_client_error(vs);
|
|
}
|
|
} else {
|
|
VNC_DEBUG("Telling client we support auth %d\n", vs->vd->auth);
|
|
vnc_write_u8(vs, 1); /* num auth */
|
|
vnc_write_u8(vs, vs->vd->auth);
|
|
vnc_read_when(vs, protocol_client_auth, 1);
|
|
vnc_flush(vs);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void vnc_connect(VncDisplay *vd, int csock)
|
|
{
|
|
VncState *vs = qemu_mallocz(sizeof(VncState));
|
|
vs->csock = csock;
|
|
|
|
VNC_DEBUG("New client on socket %d\n", csock);
|
|
dcl->idle = 0;
|
|
socket_set_nonblock(vs->csock);
|
|
qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs);
|
|
|
|
vs->vd = vd;
|
|
vs->ds = vd->ds;
|
|
vs->timer = qemu_new_timer(rt_clock, vnc_update_client, vs);
|
|
vs->last_x = -1;
|
|
vs->last_y = -1;
|
|
|
|
vs->as.freq = 44100;
|
|
vs->as.nchannels = 2;
|
|
vs->as.fmt = AUD_FMT_S16;
|
|
vs->as.endianness = 0;
|
|
|
|
vnc_resize(vs);
|
|
vnc_write(vs, "RFB 003.008\n", 12);
|
|
vnc_flush(vs);
|
|
vnc_read_when(vs, protocol_version, 12);
|
|
vnc_update_client(vs);
|
|
reset_keys(vs);
|
|
|
|
vs->next = vd->clients;
|
|
vd->clients = vs;
|
|
}
|
|
|
|
static void vnc_listen_read(void *opaque)
|
|
{
|
|
VncDisplay *vs = opaque;
|
|
struct sockaddr_in addr;
|
|
socklen_t addrlen = sizeof(addr);
|
|
|
|
/* Catch-up */
|
|
vga_hw_update();
|
|
|
|
int csock = accept(vs->lsock, (struct sockaddr *)&addr, &addrlen);
|
|
if (csock != -1) {
|
|
vnc_connect(vs, csock);
|
|
}
|
|
}
|
|
|
|
void vnc_display_init(DisplayState *ds)
|
|
{
|
|
VncDisplay *vs;
|
|
|
|
vs = qemu_mallocz(sizeof(VncState));
|
|
dcl = qemu_mallocz(sizeof(DisplayChangeListener));
|
|
|
|
ds->opaque = vs;
|
|
dcl->idle = 1;
|
|
vnc_display = vs;
|
|
|
|
vs->lsock = -1;
|
|
|
|
vs->ds = ds;
|
|
|
|
if (keyboard_layout)
|
|
vs->kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
|
|
else
|
|
vs->kbd_layout = init_keyboard_layout(name2keysym, "en-us");
|
|
|
|
if (!vs->kbd_layout)
|
|
exit(1);
|
|
|
|
dcl->dpy_copy = vnc_dpy_copy;
|
|
dcl->dpy_update = vnc_dpy_update;
|
|
dcl->dpy_resize = vnc_dpy_resize;
|
|
dcl->dpy_setdata = vnc_dpy_setdata;
|
|
register_displaychangelistener(ds, dcl);
|
|
}
|
|
|
|
|
|
void vnc_display_close(DisplayState *ds)
|
|
{
|
|
VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
|
|
|
|
if (!vs)
|
|
return;
|
|
if (vs->display) {
|
|
qemu_free(vs->display);
|
|
vs->display = NULL;
|
|
}
|
|
if (vs->lsock != -1) {
|
|
qemu_set_fd_handler2(vs->lsock, NULL, NULL, NULL, NULL);
|
|
close(vs->lsock);
|
|
vs->lsock = -1;
|
|
}
|
|
vs->auth = VNC_AUTH_INVALID;
|
|
#ifdef CONFIG_VNC_TLS
|
|
vs->subauth = VNC_AUTH_INVALID;
|
|
vs->tls.x509verify = 0;
|
|
#endif
|
|
}
|
|
|
|
int vnc_display_password(DisplayState *ds, const char *password)
|
|
{
|
|
VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
|
|
|
|
if (vs->password) {
|
|
qemu_free(vs->password);
|
|
vs->password = NULL;
|
|
}
|
|
if (password && password[0]) {
|
|
if (!(vs->password = qemu_strdup(password)))
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
char *vnc_display_local_addr(DisplayState *ds)
|
|
{
|
|
VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
|
|
|
|
return vnc_socket_local_addr("%s:%s", vs->lsock);
|
|
}
|
|
|
|
int vnc_display_open(DisplayState *ds, const char *display)
|
|
{
|
|
VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
|
|
const char *options;
|
|
int password = 0;
|
|
int reverse = 0;
|
|
int to_port = 0;
|
|
#ifdef CONFIG_VNC_TLS
|
|
int tls = 0, x509 = 0;
|
|
#endif
|
|
#ifdef CONFIG_VNC_SASL
|
|
int sasl = 0;
|
|
int saslErr;
|
|
#endif
|
|
int acl = 0;
|
|
|
|
if (!vnc_display)
|
|
return -1;
|
|
vnc_display_close(ds);
|
|
if (strcmp(display, "none") == 0)
|
|
return 0;
|
|
|
|
if (!(vs->display = strdup(display)))
|
|
return -1;
|
|
|
|
options = display;
|
|
while ((options = strchr(options, ','))) {
|
|
options++;
|
|
if (strncmp(options, "password", 8) == 0) {
|
|
password = 1; /* Require password auth */
|
|
} else if (strncmp(options, "reverse", 7) == 0) {
|
|
reverse = 1;
|
|
} else if (strncmp(options, "to=", 3) == 0) {
|
|
to_port = atoi(options+3) + 5900;
|
|
#ifdef CONFIG_VNC_SASL
|
|
} else if (strncmp(options, "sasl", 4) == 0) {
|
|
sasl = 1; /* Require SASL auth */
|
|
#endif
|
|
#ifdef CONFIG_VNC_TLS
|
|
} else if (strncmp(options, "tls", 3) == 0) {
|
|
tls = 1; /* Require TLS */
|
|
} else if (strncmp(options, "x509", 4) == 0) {
|
|
char *start, *end;
|
|
x509 = 1; /* Require x509 certificates */
|
|
if (strncmp(options, "x509verify", 10) == 0)
|
|
vs->tls.x509verify = 1; /* ...and verify client certs */
|
|
|
|
/* Now check for 'x509=/some/path' postfix
|
|
* and use that to setup x509 certificate/key paths */
|
|
start = strchr(options, '=');
|
|
end = strchr(options, ',');
|
|
if (start && (!end || (start < end))) {
|
|
int len = end ? end-(start+1) : strlen(start+1);
|
|
char *path = qemu_strndup(start + 1, len);
|
|
|
|
VNC_DEBUG("Trying certificate path '%s'\n", path);
|
|
if (vnc_tls_set_x509_creds_dir(vs, path) < 0) {
|
|
fprintf(stderr, "Failed to find x509 certificates/keys in %s\n", path);
|
|
qemu_free(path);
|
|
qemu_free(vs->display);
|
|
vs->display = NULL;
|
|
return -1;
|
|
}
|
|
qemu_free(path);
|
|
} else {
|
|
fprintf(stderr, "No certificate path provided\n");
|
|
qemu_free(vs->display);
|
|
vs->display = NULL;
|
|
return -1;
|
|
}
|
|
#endif
|
|
} else if (strncmp(options, "acl", 3) == 0) {
|
|
acl = 1;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_VNC_TLS
|
|
if (acl && x509 && vs->tls.x509verify) {
|
|
if (!(vs->tls.acl = qemu_acl_init("vnc.x509dname"))) {
|
|
fprintf(stderr, "Failed to create x509 dname ACL\n");
|
|
exit(1);
|
|
}
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_VNC_SASL
|
|
if (acl && sasl) {
|
|
if (!(vs->sasl.acl = qemu_acl_init("vnc.username"))) {
|
|
fprintf(stderr, "Failed to create username ACL\n");
|
|
exit(1);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Combinations we support here:
|
|
*
|
|
* - no-auth (clear text, no auth)
|
|
* - password (clear text, weak auth)
|
|
* - sasl (encrypt, good auth *IF* using Kerberos via GSSAPI)
|
|
* - tls (encrypt, weak anonymous creds, no auth)
|
|
* - tls + password (encrypt, weak anonymous creds, weak auth)
|
|
* - tls + sasl (encrypt, weak anonymous creds, good auth)
|
|
* - tls + x509 (encrypt, good x509 creds, no auth)
|
|
* - tls + x509 + password (encrypt, good x509 creds, weak auth)
|
|
* - tls + x509 + sasl (encrypt, good x509 creds, good auth)
|
|
*
|
|
* NB1. TLS is a stackable auth scheme.
|
|
* NB2. the x509 schemes have option to validate a client cert dname
|
|
*/
|
|
if (password) {
|
|
#ifdef CONFIG_VNC_TLS
|
|
if (tls) {
|
|
vs->auth = VNC_AUTH_VENCRYPT;
|
|
if (x509) {
|
|
VNC_DEBUG("Initializing VNC server with x509 password auth\n");
|
|
vs->subauth = VNC_AUTH_VENCRYPT_X509VNC;
|
|
} else {
|
|
VNC_DEBUG("Initializing VNC server with TLS password auth\n");
|
|
vs->subauth = VNC_AUTH_VENCRYPT_TLSVNC;
|
|
}
|
|
} else {
|
|
#endif /* CONFIG_VNC_TLS */
|
|
VNC_DEBUG("Initializing VNC server with password auth\n");
|
|
vs->auth = VNC_AUTH_VNC;
|
|
#ifdef CONFIG_VNC_TLS
|
|
vs->subauth = VNC_AUTH_INVALID;
|
|
}
|
|
#endif /* CONFIG_VNC_TLS */
|
|
#ifdef CONFIG_VNC_SASL
|
|
} else if (sasl) {
|
|
#ifdef CONFIG_VNC_TLS
|
|
if (tls) {
|
|
vs->auth = VNC_AUTH_VENCRYPT;
|
|
if (x509) {
|
|
VNC_DEBUG("Initializing VNC server with x509 SASL auth\n");
|
|
vs->subauth = VNC_AUTH_VENCRYPT_X509SASL;
|
|
} else {
|
|
VNC_DEBUG("Initializing VNC server with TLS SASL auth\n");
|
|
vs->subauth = VNC_AUTH_VENCRYPT_TLSSASL;
|
|
}
|
|
} else {
|
|
#endif /* CONFIG_VNC_TLS */
|
|
VNC_DEBUG("Initializing VNC server with SASL auth\n");
|
|
vs->auth = VNC_AUTH_SASL;
|
|
#ifdef CONFIG_VNC_TLS
|
|
vs->subauth = VNC_AUTH_INVALID;
|
|
}
|
|
#endif /* CONFIG_VNC_TLS */
|
|
#endif /* CONFIG_VNC_SASL */
|
|
} else {
|
|
#ifdef CONFIG_VNC_TLS
|
|
if (tls) {
|
|
vs->auth = VNC_AUTH_VENCRYPT;
|
|
if (x509) {
|
|
VNC_DEBUG("Initializing VNC server with x509 no auth\n");
|
|
vs->subauth = VNC_AUTH_VENCRYPT_X509NONE;
|
|
} else {
|
|
VNC_DEBUG("Initializing VNC server with TLS no auth\n");
|
|
vs->subauth = VNC_AUTH_VENCRYPT_TLSNONE;
|
|
}
|
|
} else {
|
|
#endif
|
|
VNC_DEBUG("Initializing VNC server with no auth\n");
|
|
vs->auth = VNC_AUTH_NONE;
|
|
#ifdef CONFIG_VNC_TLS
|
|
vs->subauth = VNC_AUTH_INVALID;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#ifdef CONFIG_VNC_SASL
|
|
if ((saslErr = sasl_server_init(NULL, "qemu")) != SASL_OK) {
|
|
fprintf(stderr, "Failed to initialize SASL auth %s",
|
|
sasl_errstring(saslErr, NULL, NULL));
|
|
free(vs->display);
|
|
vs->display = NULL;
|
|
return -1;
|
|
}
|
|
#endif
|
|
|
|
if (reverse) {
|
|
/* connect to viewer */
|
|
if (strncmp(display, "unix:", 5) == 0)
|
|
vs->lsock = unix_connect(display+5);
|
|
else
|
|
vs->lsock = inet_connect(display, SOCK_STREAM);
|
|
if (-1 == vs->lsock) {
|
|
free(vs->display);
|
|
vs->display = NULL;
|
|
return -1;
|
|
} else {
|
|
int csock = vs->lsock;
|
|
vs->lsock = -1;
|
|
vnc_connect(vs, csock);
|
|
}
|
|
return 0;
|
|
|
|
} else {
|
|
/* listen for connects */
|
|
char *dpy;
|
|
dpy = qemu_malloc(256);
|
|
if (strncmp(display, "unix:", 5) == 0) {
|
|
pstrcpy(dpy, 256, "unix:");
|
|
vs->lsock = unix_listen(display+5, dpy+5, 256-5);
|
|
} else {
|
|
vs->lsock = inet_listen(display, dpy, 256, SOCK_STREAM, 5900);
|
|
}
|
|
if (-1 == vs->lsock) {
|
|
free(dpy);
|
|
return -1;
|
|
} else {
|
|
free(vs->display);
|
|
vs->display = dpy;
|
|
}
|
|
}
|
|
return qemu_set_fd_handler2(vs->lsock, NULL, vnc_listen_read, NULL, vs);
|
|
}
|