/* * QEMU VNC display driver * * Copyright (C) 2006 Anthony Liguori * Copyright (C) 2006 Fabrice Bellard * Copyright (C) 2009 Red Hat, Inc * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "vnc.h" #include "vnc-jobs.h" #include "sysemu.h" #include "qemu_socket.h" #include "qemu-timer.h" #include "acl.h" #include "qemu-objects.h" #define VNC_REFRESH_INTERVAL_BASE 30 #define VNC_REFRESH_INTERVAL_INC 50 #define VNC_REFRESH_INTERVAL_MAX 2000 static const struct timeval VNC_REFRESH_STATS = { 0, 500000 }; static const struct timeval VNC_REFRESH_LOSSY = { 2, 0 }; #include "vnc_keysym.h" #include "d3des.h" static VncDisplay *vnc_display; /* needed for info vnc */ static DisplayChangeListener *dcl; static int vnc_cursor_define(VncState *vs); static char *addr_to_string(const char *format, struct sockaddr_storage *sa, socklen_t salen) { char *addr; char host[NI_MAXHOST]; char serv[NI_MAXSERV]; int err; size_t addrlen; if ((err = getnameinfo((struct sockaddr *)sa, salen, host, sizeof(host), serv, sizeof(serv), NI_NUMERICHOST | NI_NUMERICSERV)) != 0) { VNC_DEBUG("Cannot resolve address %d: %s\n", err, gai_strerror(err)); return NULL; } /* Enough for the existing format + the 2 vars we're * substituting in. */ addrlen = strlen(format) + strlen(host) + strlen(serv); addr = qemu_malloc(addrlen + 1); snprintf(addr, addrlen, format, host, serv); addr[addrlen] = '\0'; return addr; } char *vnc_socket_local_addr(const char *format, int fd) { struct sockaddr_storage sa; socklen_t salen; salen = sizeof(sa); if (getsockname(fd, (struct sockaddr*)&sa, &salen) < 0) return NULL; return addr_to_string(format, &sa, salen); } char *vnc_socket_remote_addr(const char *format, int fd) { struct sockaddr_storage sa; socklen_t salen; salen = sizeof(sa); if (getpeername(fd, (struct sockaddr*)&sa, &salen) < 0) return NULL; return addr_to_string(format, &sa, salen); } static int put_addr_qdict(QDict *qdict, struct sockaddr_storage *sa, socklen_t salen) { char host[NI_MAXHOST]; char serv[NI_MAXSERV]; int err; if ((err = getnameinfo((struct sockaddr *)sa, salen, host, sizeof(host), serv, sizeof(serv), NI_NUMERICHOST | NI_NUMERICSERV)) != 0) { VNC_DEBUG("Cannot resolve address %d: %s\n", err, gai_strerror(err)); return -1; } qdict_put(qdict, "host", qstring_from_str(host)); qdict_put(qdict, "service", qstring_from_str(serv)); qdict_put(qdict, "family",qstring_from_str(inet_strfamily(sa->ss_family))); return 0; } static int vnc_server_addr_put(QDict *qdict, int fd) { struct sockaddr_storage sa; socklen_t salen; salen = sizeof(sa); if (getsockname(fd, (struct sockaddr*)&sa, &salen) < 0) { return -1; } return put_addr_qdict(qdict, &sa, salen); } static int vnc_qdict_remote_addr(QDict *qdict, int fd) { struct sockaddr_storage sa; socklen_t salen; salen = sizeof(sa); if (getpeername(fd, (struct sockaddr*)&sa, &salen) < 0) { return -1; } return put_addr_qdict(qdict, &sa, salen); } static const char *vnc_auth_name(VncDisplay *vd) { switch (vd->auth) { case VNC_AUTH_INVALID: return "invalid"; case VNC_AUTH_NONE: return "none"; case VNC_AUTH_VNC: return "vnc"; case VNC_AUTH_RA2: return "ra2"; case VNC_AUTH_RA2NE: return "ra2ne"; case VNC_AUTH_TIGHT: return "tight"; case VNC_AUTH_ULTRA: return "ultra"; case VNC_AUTH_TLS: return "tls"; case VNC_AUTH_VENCRYPT: #ifdef CONFIG_VNC_TLS switch (vd->subauth) { case VNC_AUTH_VENCRYPT_PLAIN: return "vencrypt+plain"; case VNC_AUTH_VENCRYPT_TLSNONE: return "vencrypt+tls+none"; case VNC_AUTH_VENCRYPT_TLSVNC: return "vencrypt+tls+vnc"; case VNC_AUTH_VENCRYPT_TLSPLAIN: return "vencrypt+tls+plain"; case VNC_AUTH_VENCRYPT_X509NONE: return "vencrypt+x509+none"; case VNC_AUTH_VENCRYPT_X509VNC: return "vencrypt+x509+vnc"; case VNC_AUTH_VENCRYPT_X509PLAIN: return "vencrypt+x509+plain"; case VNC_AUTH_VENCRYPT_TLSSASL: return "vencrypt+tls+sasl"; case VNC_AUTH_VENCRYPT_X509SASL: return "vencrypt+x509+sasl"; default: return "vencrypt"; } #else return "vencrypt"; #endif case VNC_AUTH_SASL: return "sasl"; } return "unknown"; } static int vnc_server_info_put(QDict *qdict) { if (vnc_server_addr_put(qdict, vnc_display->lsock) < 0) { return -1; } qdict_put(qdict, "auth", qstring_from_str(vnc_auth_name(vnc_display))); return 0; } static void vnc_client_cache_auth(VncState *client) { #if defined(CONFIG_VNC_TLS) || defined(CONFIG_VNC_SASL) QDict *qdict; #endif if (!client->info) { return; } #if defined(CONFIG_VNC_TLS) || defined(CONFIG_VNC_SASL) qdict = qobject_to_qdict(client->info); #endif #ifdef CONFIG_VNC_TLS if (client->tls.session && client->tls.dname) { qdict_put(qdict, "x509_dname", qstring_from_str(client->tls.dname)); } #endif #ifdef CONFIG_VNC_SASL if (client->sasl.conn && client->sasl.username) { qdict_put(qdict, "sasl_username", qstring_from_str(client->sasl.username)); } #endif } static void vnc_client_cache_addr(VncState *client) { QDict *qdict; qdict = qdict_new(); if (vnc_qdict_remote_addr(qdict, client->csock) < 0) { QDECREF(qdict); /* XXX: how to report the error? */ return; } client->info = QOBJECT(qdict); } static void vnc_qmp_event(VncState *vs, MonitorEvent event) { QDict *server; QObject *data; if (!vs->info) { return; } server = qdict_new(); if (vnc_server_info_put(server) < 0) { QDECREF(server); return; } data = qobject_from_jsonf("{ 'client': %p, 'server': %p }", vs->info, QOBJECT(server)); monitor_protocol_event(event, data); qobject_incref(vs->info); qobject_decref(data); } static void info_vnc_iter(QObject *obj, void *opaque) { QDict *client; Monitor *mon = opaque; client = qobject_to_qdict(obj); monitor_printf(mon, "Client:\n"); monitor_printf(mon, " address: %s:%s\n", qdict_get_str(client, "host"), qdict_get_str(client, "service")); #ifdef CONFIG_VNC_TLS monitor_printf(mon, " x509_dname: %s\n", qdict_haskey(client, "x509_dname") ? qdict_get_str(client, "x509_dname") : "none"); #endif #ifdef CONFIG_VNC_SASL monitor_printf(mon, " username: %s\n", qdict_haskey(client, "sasl_username") ? qdict_get_str(client, "sasl_username") : "none"); #endif } void do_info_vnc_print(Monitor *mon, const QObject *data) { QDict *server; QList *clients; server = qobject_to_qdict(data); if (qdict_get_bool(server, "enabled") == 0) { monitor_printf(mon, "Server: disabled\n"); return; } monitor_printf(mon, "Server:\n"); monitor_printf(mon, " address: %s:%s\n", qdict_get_str(server, "host"), qdict_get_str(server, "service")); monitor_printf(mon, " auth: %s\n", qdict_get_str(server, "auth")); clients = qdict_get_qlist(server, "clients"); if (qlist_empty(clients)) { monitor_printf(mon, "Client: none\n"); } else { qlist_iter(clients, info_vnc_iter, mon); } } void do_info_vnc(Monitor *mon, QObject **ret_data) { if (vnc_display == NULL || vnc_display->display == NULL) { *ret_data = qobject_from_jsonf("{ 'enabled': false }"); } else { QList *clist; VncState *client; clist = qlist_new(); QTAILQ_FOREACH(client, &vnc_display->clients, next) { if (client->info) { /* incref so that it's not freed by upper layers */ qobject_incref(client->info); qlist_append_obj(clist, client->info); } } *ret_data = qobject_from_jsonf("{ 'enabled': true, 'clients': %p }", QOBJECT(clist)); assert(*ret_data != NULL); if (vnc_server_info_put(qobject_to_qdict(*ret_data)) < 0) { qobject_decref(*ret_data); *ret_data = NULL; } } } /* TODO 1) Get the queue working for IO. 2) there is some weirdness when using the -S option (the screen is grey and not totally invalidated 3) resolutions > 1024 */ static int vnc_update_client(VncState *vs, int has_dirty); static int vnc_update_client_sync(VncState *vs, int has_dirty); static void vnc_disconnect_start(VncState *vs); static void vnc_disconnect_finish(VncState *vs); static void vnc_init_timer(VncDisplay *vd); static void vnc_remove_timer(VncDisplay *vd); static void vnc_colordepth(VncState *vs); static void framebuffer_update_request(VncState *vs, int incremental, int x_position, int y_position, int w, int h); static void vnc_refresh(void *opaque); static int vnc_refresh_server_surface(VncDisplay *vd); static void vnc_dpy_update(DisplayState *ds, int x, int y, int w, int h) { int i; VncDisplay *vd = ds->opaque; struct VncSurface *s = &vd->guest; h += y; /* round x down to ensure the loop only spans one 16-pixel block per, iteration. otherwise, if (x % 16) != 0, the last iteration may span two 16-pixel blocks but we only mark the first as dirty */ w += (x % 16); x -= (x % 16); x = MIN(x, s->ds->width); y = MIN(y, s->ds->height); w = MIN(x + w, s->ds->width) - x; h = MIN(h, s->ds->height); for (; y < h; y++) for (i = 0; i < w; i += 16) set_bit((x + i) / 16, s->dirty[y]); } void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h, int32_t encoding) { vnc_write_u16(vs, x); vnc_write_u16(vs, y); vnc_write_u16(vs, w); vnc_write_u16(vs, h); vnc_write_s32(vs, encoding); } void buffer_reserve(Buffer *buffer, size_t len) { if ((buffer->capacity - buffer->offset) < len) { buffer->capacity += (len + 1024); buffer->buffer = qemu_realloc(buffer->buffer, buffer->capacity); if (buffer->buffer == NULL) { fprintf(stderr, "vnc: out of memory\n"); exit(1); } } } int buffer_empty(Buffer *buffer) { return buffer->offset == 0; } uint8_t *buffer_end(Buffer *buffer) { return buffer->buffer + buffer->offset; } void buffer_reset(Buffer *buffer) { buffer->offset = 0; } void buffer_free(Buffer *buffer) { qemu_free(buffer->buffer); buffer->offset = 0; buffer->capacity = 0; buffer->buffer = NULL; } void buffer_append(Buffer *buffer, const void *data, size_t len) { memcpy(buffer->buffer + buffer->offset, data, len); buffer->offset += len; } static void vnc_desktop_resize(VncState *vs) { DisplayState *ds = vs->ds; if (vs->csock == -1 || !vnc_has_feature(vs, VNC_FEATURE_RESIZE)) { return; } if (vs->client_width == ds_get_width(ds) && vs->client_height == ds_get_height(ds)) { return; } vs->client_width = ds_get_width(ds); vs->client_height = ds_get_height(ds); vnc_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); vnc_write_u8(vs, 0); vnc_write_u16(vs, 1); /* number of rects */ vnc_framebuffer_update(vs, 0, 0, vs->client_width, vs->client_height, VNC_ENCODING_DESKTOPRESIZE); vnc_unlock_output(vs); vnc_flush(vs); } #ifdef CONFIG_VNC_THREAD static void vnc_abort_display_jobs(VncDisplay *vd) { VncState *vs; QTAILQ_FOREACH(vs, &vd->clients, next) { vnc_lock_output(vs); vs->abort = true; vnc_unlock_output(vs); } QTAILQ_FOREACH(vs, &vd->clients, next) { vnc_jobs_join(vs); } QTAILQ_FOREACH(vs, &vd->clients, next) { vnc_lock_output(vs); vs->abort = false; vnc_unlock_output(vs); } } #else static void vnc_abort_display_jobs(VncDisplay *vd) { } #endif static void vnc_dpy_resize(DisplayState *ds) { VncDisplay *vd = ds->opaque; VncState *vs; vnc_abort_display_jobs(vd); /* server surface */ if (!vd->server) vd->server = qemu_mallocz(sizeof(*vd->server)); if (vd->server->data) qemu_free(vd->server->data); *(vd->server) = *(ds->surface); vd->server->data = qemu_mallocz(vd->server->linesize * vd->server->height); /* guest surface */ if (!vd->guest.ds) vd->guest.ds = qemu_mallocz(sizeof(*vd->guest.ds)); if (ds_get_bytes_per_pixel(ds) != vd->guest.ds->pf.bytes_per_pixel) console_color_init(ds); *(vd->guest.ds) = *(ds->surface); memset(vd->guest.dirty, 0xFF, sizeof(vd->guest.dirty)); QTAILQ_FOREACH(vs, &vd->clients, next) { vnc_colordepth(vs); vnc_desktop_resize(vs); if (vs->vd->cursor) { vnc_cursor_define(vs); } memset(vs->dirty, 0xFF, sizeof(vs->dirty)); } } /* fastest code */ static void vnc_write_pixels_copy(VncState *vs, struct PixelFormat *pf, void *pixels, int size) { vnc_write(vs, pixels, size); } /* slowest but generic code. */ void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v) { uint8_t r, g, b; VncDisplay *vd = vs->vd; r = ((((v & vd->server->pf.rmask) >> vd->server->pf.rshift) << vs->clientds.pf.rbits) >> vd->server->pf.rbits); g = ((((v & vd->server->pf.gmask) >> vd->server->pf.gshift) << vs->clientds.pf.gbits) >> vd->server->pf.gbits); b = ((((v & vd->server->pf.bmask) >> vd->server->pf.bshift) << vs->clientds.pf.bbits) >> vd->server->pf.bbits); v = (r << vs->clientds.pf.rshift) | (g << vs->clientds.pf.gshift) | (b << vs->clientds.pf.bshift); switch(vs->clientds.pf.bytes_per_pixel) { case 1: buf[0] = v; break; case 2: if (vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) { buf[0] = v >> 8; buf[1] = v; } else { buf[1] = v >> 8; buf[0] = v; } break; default: case 4: if (vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) { buf[0] = v >> 24; buf[1] = v >> 16; buf[2] = v >> 8; buf[3] = v; } else { buf[3] = v >> 24; buf[2] = v >> 16; buf[1] = v >> 8; buf[0] = v; } break; } } static void vnc_write_pixels_generic(VncState *vs, struct PixelFormat *pf, void *pixels1, int size) { uint8_t buf[4]; if (pf->bytes_per_pixel == 4) { uint32_t *pixels = pixels1; int n, i; n = size >> 2; for(i = 0; i < n; i++) { vnc_convert_pixel(vs, buf, pixels[i]); vnc_write(vs, buf, vs->clientds.pf.bytes_per_pixel); } } else if (pf->bytes_per_pixel == 2) { uint16_t *pixels = pixels1; int n, i; n = size >> 1; for(i = 0; i < n; i++) { vnc_convert_pixel(vs, buf, pixels[i]); vnc_write(vs, buf, vs->clientds.pf.bytes_per_pixel); } } else if (pf->bytes_per_pixel == 1) { uint8_t *pixels = pixels1; int n, i; n = size; for(i = 0; i < n; i++) { vnc_convert_pixel(vs, buf, pixels[i]); vnc_write(vs, buf, vs->clientds.pf.bytes_per_pixel); } } else { fprintf(stderr, "vnc_write_pixels_generic: VncState color depth not supported\n"); } } int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h) { int i; uint8_t *row; VncDisplay *vd = vs->vd; row = vd->server->data + y * ds_get_linesize(vs->ds) + x * ds_get_bytes_per_pixel(vs->ds); for (i = 0; i < h; i++) { vs->write_pixels(vs, &vd->server->pf, row, w * ds_get_bytes_per_pixel(vs->ds)); row += ds_get_linesize(vs->ds); } return 1; } int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h) { int n = 0; switch(vs->vnc_encoding) { case VNC_ENCODING_ZLIB: n = vnc_zlib_send_framebuffer_update(vs, x, y, w, h); break; case VNC_ENCODING_HEXTILE: vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_HEXTILE); n = vnc_hextile_send_framebuffer_update(vs, x, y, w, h); break; case VNC_ENCODING_TIGHT: n = vnc_tight_send_framebuffer_update(vs, x, y, w, h); break; case VNC_ENCODING_TIGHT_PNG: n = vnc_tight_png_send_framebuffer_update(vs, x, y, w, h); break; case VNC_ENCODING_ZRLE: n = vnc_zrle_send_framebuffer_update(vs, x, y, w, h); break; case VNC_ENCODING_ZYWRLE: n = vnc_zywrle_send_framebuffer_update(vs, x, y, w, h); break; default: vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_RAW); n = vnc_raw_send_framebuffer_update(vs, x, y, w, h); break; } return n; } static void vnc_copy(VncState *vs, int src_x, int src_y, int dst_x, int dst_y, int w, int h) { /* send bitblit op to the vnc client */ vnc_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 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_unlock_output(vs); 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, *vn; uint8_t *src_row; uint8_t *dst_row; int i,x,y,pitch,depth,inc,w_lim,s; int cmp_bytes; vnc_refresh_server_surface(vd); QTAILQ_FOREACH_SAFE(vs, &vd->clients, next, vn) { if (vnc_has_feature(vs, VNC_FEATURE_COPYRECT)) { vs->force_update = 1; vnc_update_client_sync(vs, 1); /* vs might be free()ed here */ } } /* do bitblit op on the local surface too */ pitch = ds_get_linesize(vd->ds); depth = ds_get_bytes_per_pixel(vd->ds); src_row = vd->server->data + pitch * src_y + depth * src_x; dst_row = vd->server->data + pitch * dst_y + depth * dst_x; y = dst_y; inc = 1; if (dst_y > src_y) { /* copy backwards */ src_row += pitch * (h-1); dst_row += pitch * (h-1); pitch = -pitch; y = dst_y + h - 1; inc = -1; } w_lim = w - (16 - (dst_x % 16)); if (w_lim < 0) w_lim = w; else w_lim = w - (w_lim % 16); for (i = 0; i < h; i++) { for (x = 0; x <= w_lim; x += s, src_row += cmp_bytes, dst_row += cmp_bytes) { if (x == w_lim) { if ((s = w - w_lim) == 0) break; } else if (!x) { s = (16 - (dst_x % 16)); s = MIN(s, w_lim); } else { s = 16; } cmp_bytes = s * depth; if (memcmp(src_row, dst_row, cmp_bytes) == 0) continue; memmove(dst_row, src_row, cmp_bytes); QTAILQ_FOREACH(vs, &vd->clients, next) { if (!vnc_has_feature(vs, VNC_FEATURE_COPYRECT)) { set_bit(((x + dst_x) / 16), vs->dirty[y]); } } } src_row += pitch - w * depth; dst_row += pitch - w * depth; y += inc; } QTAILQ_FOREACH(vs, &vd->clients, next) { if (vnc_has_feature(vs, VNC_FEATURE_COPYRECT)) { vnc_copy(vs, src_x, src_y, dst_x, dst_y, w, h); } } } static void vnc_mouse_set(int x, int y, int visible) { /* can we ask the client(s) to move the pointer ??? */ } static int vnc_cursor_define(VncState *vs) { QEMUCursor *c = vs->vd->cursor; PixelFormat pf = qemu_default_pixelformat(32); int isize; if (vnc_has_feature(vs, VNC_FEATURE_RICH_CURSOR)) { vnc_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); vnc_write_u8(vs, 0); /* padding */ vnc_write_u16(vs, 1); /* # of rects */ vnc_framebuffer_update(vs, c->hot_x, c->hot_y, c->width, c->height, VNC_ENCODING_RICH_CURSOR); isize = c->width * c->height * vs->clientds.pf.bytes_per_pixel; vnc_write_pixels_generic(vs, &pf, c->data, isize); vnc_write(vs, vs->vd->cursor_mask, vs->vd->cursor_msize); vnc_unlock_output(vs); return 0; } return -1; } static void vnc_dpy_cursor_define(QEMUCursor *c) { VncDisplay *vd = vnc_display; VncState *vs; cursor_put(vd->cursor); qemu_free(vd->cursor_mask); vd->cursor = c; cursor_get(vd->cursor); vd->cursor_msize = cursor_get_mono_bpl(c) * c->height; vd->cursor_mask = qemu_mallocz(vd->cursor_msize); cursor_get_mono_mask(c, 0, vd->cursor_mask); QTAILQ_FOREACH(vs, &vd->clients, next) { vnc_cursor_define(vs); } } static int find_and_clear_dirty_height(struct VncState *vs, int y, int last_x, int x, int height) { int h; for (h = 1; h < (height - y); h++) { int tmp_x; if (!test_bit(last_x, vs->dirty[y + h])) { break; } for (tmp_x = last_x; tmp_x < x; tmp_x++) { clear_bit(tmp_x, vs->dirty[y + h]); } } return h; } #ifdef CONFIG_VNC_THREAD static int vnc_update_client_sync(VncState *vs, int has_dirty) { int ret = vnc_update_client(vs, has_dirty); vnc_jobs_join(vs); return ret; } #else static int vnc_update_client_sync(VncState *vs, int has_dirty) { return vnc_update_client(vs, has_dirty); } #endif static int vnc_update_client(VncState *vs, int has_dirty) { if (vs->need_update && vs->csock != -1) { VncDisplay *vd = vs->vd; VncJob *job; int y; int width, height; int n = 0; if (vs->output.offset && !vs->audio_cap && !vs->force_update) /* kernel send buffers are full -> drop frames to throttle */ return 0; if (!has_dirty && !vs->audio_cap && !vs->force_update) return 0; /* * 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. */ job = vnc_job_new(vs); width = MIN(vd->server->width, vs->client_width); height = MIN(vd->server->height, vs->client_height); for (y = 0; y < height; y++) { int x; int last_x = -1; for (x = 0; x < width / 16; x++) { if (test_and_clear_bit(x, vs->dirty[y])) { if (last_x == -1) { last_x = x; } } else { if (last_x != -1) { int h = find_and_clear_dirty_height(vs, y, last_x, x, height); n += vnc_job_add_rect(job, last_x * 16, y, (x - last_x) * 16, h); } last_x = -1; } } if (last_x != -1) { int h = find_and_clear_dirty_height(vs, y, last_x, x, height); n += vnc_job_add_rect(job, last_x * 16, y, (x - last_x) * 16, h); } } vnc_job_push(job); vs->force_update = 0; return n; } if (vs->csock == -1) vnc_disconnect_finish(vs); return 0; } /* audio */ static void audio_capture_notify(void *opaque, audcnotification_e cmd) { VncState *vs = opaque; switch (cmd) { case AUD_CNOTIFY_DISABLE: vnc_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_QEMU); vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO); vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_END); vnc_unlock_output(vs); vnc_flush(vs); break; case AUD_CNOTIFY_ENABLE: vnc_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_QEMU); vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO); vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_BEGIN); vnc_unlock_output(vs); 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_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_QEMU); vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO); vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_DATA); vnc_write_u32(vs, size); vnc_write(vs, buf, size); vnc_unlock_output(vs); vnc_flush(vs); } static void audio_add(VncState *vs) { struct audio_capture_ops ops; if (vs->audio_cap) { monitor_printf(default_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(default_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; } } static void vnc_disconnect_start(VncState *vs) { if (vs->csock == -1) return; qemu_set_fd_handler2(vs->csock, NULL, NULL, NULL, NULL); closesocket(vs->csock); vs->csock = -1; } static void vnc_disconnect_finish(VncState *vs) { int i; vnc_jobs_join(vs); /* Wait encoding jobs */ vnc_lock_output(vs); vnc_qmp_event(vs, QEVENT_VNC_DISCONNECTED); buffer_free(&vs->input); buffer_free(&vs->output); qobject_decref(vs->info); vnc_zlib_clear(vs); vnc_tight_clear(vs); vnc_zrle_clear(vs); #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); QTAILQ_REMOVE(&vs->vd->clients, vs, next); if (QTAILQ_EMPTY(&vs->vd->clients)) { dcl->idle = 1; } qemu_remove_mouse_mode_change_notifier(&vs->mouse_mode_notifier); vnc_remove_timer(vs->vd); if (vs->vd->lock_key_sync) qemu_remove_led_event_handler(vs->led); vnc_unlock_output(vs); #ifdef CONFIG_VNC_THREAD qemu_mutex_destroy(&vs->output_mutex); #endif for (i = 0; i < VNC_STAT_ROWS; ++i) { qemu_free(vs->lossy_rect[i]); } qemu_free(vs->lossy_rect); qemu_free(vs); } 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: ret %d, errno %d\n", ret, ret < 0 ? last_errno : 0); vnc_disconnect_start(vs); return 0; } return ret; } void vnc_client_error(VncState *vs) { VNC_DEBUG("Closing down client sock: protocol error\n"); vnc_disconnect_start(vs); } /* * 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, (const void *)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) */ static void vnc_client_write_locked(void *opaque) { VncState *vs = opaque; #ifdef CONFIG_VNC_SASL if (vs->sasl.conn && vs->sasl.runSSF && !vs->sasl.waitWriteSSF) { vnc_client_write_sasl(vs); } else #endif /* CONFIG_VNC_SASL */ vnc_client_write_plain(vs); } void vnc_client_write(void *opaque) { VncState *vs = opaque; vnc_lock_output(vs); if (vs->output.offset) { vnc_client_write_locked(opaque); } else if (vs->csock != -1) { qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs); } vnc_unlock_output(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, (void *)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) { if (vs->csock == -1) vnc_disconnect_finish(vs); 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) { vnc_disconnect_finish(vs); 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 (vs->csock != -1 && 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) { vnc_lock_output(vs); if (vs->csock != -1 && vs->output.offset) { vnc_client_write_locked(vs); } vnc_unlock_output(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(Notifier *notifier) { VncState *vs = container_of(notifier, VncState, mouse_mode_notifier); int absolute = kbd_mouse_is_absolute(); if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE) && vs->absolute != absolute) { vnc_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 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_unlock_output(vs); 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(ds_get_width(vs->ds) > 1 ? x * 0x7FFF / (ds_get_width(vs->ds) - 1) : 0x4000, ds_get_height(vs->ds) > 1 ? y * 0x7FFF / (ds_get_height(vs->ds) - 1) : 0x4000, 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; } } static void reset_keys(VncState *vs) { int i; for(i = 0; i < 256; i++) { if (vs->modifiers_state[i]) { if (i & SCANCODE_GREY) kbd_put_keycode(SCANCODE_EMUL0); kbd_put_keycode(i | SCANCODE_UP); vs->modifiers_state[i] = 0; } } } static void press_key(VncState *vs, int keysym) { int keycode = keysym2scancode(vs->vd->kbd_layout, keysym) & SCANCODE_KEYMASK; if (keycode & SCANCODE_GREY) kbd_put_keycode(SCANCODE_EMUL0); kbd_put_keycode(keycode & SCANCODE_KEYCODEMASK); if (keycode & SCANCODE_GREY) kbd_put_keycode(SCANCODE_EMUL0); kbd_put_keycode(keycode | SCANCODE_UP); } static void kbd_leds(void *opaque, int ledstate) { VncState *vs = opaque; int caps, num; caps = ledstate & QEMU_CAPS_LOCK_LED ? 1 : 0; num = ledstate & QEMU_NUM_LOCK_LED ? 1 : 0; if (vs->modifiers_state[0x3a] != caps) { vs->modifiers_state[0x3a] = caps; } if (vs->modifiers_state[0x45] != num) { vs->modifiers_state[0x45] = num; } } 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 (down && vs->vd->lock_key_sync && 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 (down && vs->vd->lock_key_sync && ((sym >= 'A' && sym <= 'Z') || (sym >= 'a' && sym <= 'z'))) { /* If the capslock state needs to change then simulate an additional keypress before sending this one. This will happen if the user toggles capslock away from the VNC window. */ int uppercase = !!(sym >= 'A' && sym <= 'Z'); int shift = !!(vs->modifiers_state[0x2a] | vs->modifiers_state[0x36]); int capslock = !!(vs->modifiers_state[0x3a]); if (capslock) { if (uppercase == shift) { vs->modifiers_state[0x3a] = 0; press_key(vs, 0xffe5); } } else { if (uppercase != shift) { vs->modifiers_state[0x3a] = 1; press_key(vs, 0xffe5); } } } if (is_graphic_console()) { if (keycode & SCANCODE_GREY) kbd_put_keycode(SCANCODE_EMUL0); if (down) kbd_put_keycode(keycode & SCANCODE_KEYCODEMASK); else kbd_put_keycode(keycode | SCANCODE_UP); } else { /* QEMU console emulation */ if (down) { int numlock = vs->modifiers_state[0x45]; switch (keycode) { case 0x2a: /* Left Shift */ case 0x36: /* Right Shift */ case 0x1d: /* Left CTRL */ case 0x9d: /* Right CTRL */ case 0x38: /* Left ALT */ case 0xb8: /* Right ALT */ break; case 0xc8: kbd_put_keysym(QEMU_KEY_UP); break; case 0xd0: kbd_put_keysym(QEMU_KEY_DOWN); break; case 0xcb: kbd_put_keysym(QEMU_KEY_LEFT); break; case 0xcd: kbd_put_keysym(QEMU_KEY_RIGHT); break; case 0xd3: kbd_put_keysym(QEMU_KEY_DELETE); break; case 0xc7: kbd_put_keysym(QEMU_KEY_HOME); break; case 0xcf: kbd_put_keysym(QEMU_KEY_END); break; case 0xc9: kbd_put_keysym(QEMU_KEY_PAGEUP); break; case 0xd1: kbd_put_keysym(QEMU_KEY_PAGEDOWN); break; case 0x47: kbd_put_keysym(numlock ? '7' : QEMU_KEY_HOME); break; case 0x48: kbd_put_keysym(numlock ? '8' : QEMU_KEY_UP); break; case 0x49: kbd_put_keysym(numlock ? '9' : QEMU_KEY_PAGEUP); break; case 0x4b: kbd_put_keysym(numlock ? '4' : QEMU_KEY_LEFT); break; case 0x4c: kbd_put_keysym('5'); break; case 0x4d: kbd_put_keysym(numlock ? '6' : QEMU_KEY_RIGHT); break; case 0x4f: kbd_put_keysym(numlock ? '1' : QEMU_KEY_END); break; case 0x50: kbd_put_keysym(numlock ? '2' : QEMU_KEY_DOWN); break; case 0x51: kbd_put_keysym(numlock ? '3' : QEMU_KEY_PAGEDOWN); break; case 0x52: kbd_put_keysym('0'); break; case 0x53: kbd_put_keysym(numlock ? '.' : QEMU_KEY_DELETE); break; case 0xb5: kbd_put_keysym('/'); break; case 0x37: kbd_put_keysym('*'); break; case 0x4a: kbd_put_keysym('-'); break; case 0x4e: kbd_put_keysym('+'); break; case 0x9c: kbd_put_keysym('\n'); break; default: kbd_put_keysym(sym); break; } } } } static void key_event(VncState *vs, int down, uint32_t sym) { int keycode; int lsym = sym; if (lsym >= 'A' && lsym <= 'Z' && is_graphic_console()) { lsym = lsym - 'A' + 'a'; } keycode = keysym2scancode(vs->vd->kbd_layout, lsym & 0xFFFF) & SCANCODE_KEYMASK; 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 (y_position > ds_get_height(vs->ds)) y_position = ds_get_height(vs->ds); 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++) { bitmap_set(vs->dirty[y_position + i], x_position / 16, w / 16); } } } static void send_ext_key_event_ack(VncState *vs) { vnc_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 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_unlock_output(vs); vnc_flush(vs); } static void send_ext_audio_ack(VncState *vs) { vnc_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 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_unlock_output(vs); vnc_flush(vs); } static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings) { int i; unsigned int enc = 0; vs->features = 0; vs->vnc_encoding = 0; vs->tight.compression = 9; vs->tight.quality = -1; /* Lossless by default */ vs->absolute = -1; /* * Start from the end because the encodings are sent in order of preference. * This way the prefered encoding (first encoding defined in the array) * will be set at the end of the loop. */ 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_TIGHT: vs->features |= VNC_FEATURE_TIGHT_MASK; vs->vnc_encoding = enc; break; case VNC_ENCODING_TIGHT_PNG: vs->features |= VNC_FEATURE_TIGHT_PNG_MASK; vs->vnc_encoding = enc; break; case VNC_ENCODING_ZLIB: vs->features |= VNC_FEATURE_ZLIB_MASK; vs->vnc_encoding = enc; break; case VNC_ENCODING_ZRLE: vs->features |= VNC_FEATURE_ZRLE_MASK; vs->vnc_encoding = enc; break; case VNC_ENCODING_ZYWRLE: vs->features |= VNC_FEATURE_ZYWRLE_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_RICH_CURSOR: vs->features |= VNC_FEATURE_RICH_CURSOR_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: if (vs->vd->lossy) { vs->tight.quality = (enc & 0x0F); } break; default: VNC_DEBUG("Unknown encoding: %d (0x%.8x): %d\n", i, enc, enc); break; } } vnc_desktop_resize(vs); check_pointer_type_change(&vs->mouse_mode_notifier); } 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; vnc_hextile_set_pixel_conversion(vs, 0); } else { vs->write_pixels = vnc_write_pixels_generic; vnc_hextile_set_pixel_conversion(vs, 1); } } 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->vd->guest.ds); vs->clientds.pf.rmax = red_max; vs->clientds.pf.rbits = hweight_long(red_max); vs->clientds.pf.rshift = red_shift; vs->clientds.pf.rmask = red_max << red_shift; vs->clientds.pf.gmax = green_max; vs->clientds.pf.gbits = hweight_long(green_max); vs->clientds.pf.gshift = green_shift; vs->clientds.pf.gmask = green_max << green_shift; vs->clientds.pf.bmax = blue_max; vs->clientds.pf.bbits = hweight_long(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 HOST_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 */ vnc_hextile_set_pixel_conversion(vs, 0); 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_lock_output(vs); vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 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_unlock_output(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; VncDisplay *vd = vs->vd; if (data[0] > 3) { vd->timer_interval = VNC_REFRESH_INTERVAL_BASE; if (!qemu_timer_expired(vd->timer, qemu_get_clock(rt_clock) + vd->timer_interval)) qemu_mod_timer(vd->timer, qemu_get_clock(rt_clock) + vd->timer_interval); } switch (data[0]) { case VNC_MSG_CLIENT_SET_PIXEL_FORMAT: 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 VNC_MSG_CLIENT_SET_ENCODINGS: 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 VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST: 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 VNC_MSG_CLIENT_KEY_EVENT: if (len == 1) return 8; key_event(vs, read_u8(data, 1), read_u32(data, 4)); break; case VNC_MSG_CLIENT_POINTER_EVENT: if (len == 1) return 6; pointer_event(vs, read_u8(data, 1), read_u16(data, 2), read_u16(data, 4)); break; case VNC_MSG_CLIENT_CUT_TEXT: 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 VNC_MSG_CLIENT_QEMU: if (len == 1) return 2; switch (read_u8(data, 1)) { case VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT: if (len == 2) return 12; ext_key_event(vs, read_u16(data, 2), read_u32(data, 4), read_u32(data, 8)); break; case VNC_MSG_CLIENT_QEMU_AUDIO: if (len == 2) return 4; switch (read_u16 (data, 2)) { case VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE: audio_add(vs); break; case VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE: audio_del(vs); break; case VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT: 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; vs->client_width = ds_get_width(vs->ds); vs->client_height = ds_get_height(vs->ds); vnc_write_u16(vs, vs->client_width); vnc_write_u16(vs, vs->client_height); pixel_format_message(vs); if (qemu_name) size = snprintf(buf, sizeof(buf), "QEMU (%s)", qemu_name); else size = snprintf(buf, sizeof(buf), "QEMU"); vnc_write_u32(vs, size); vnc_write(vs, buf, size); vnc_flush(vs); vnc_client_cache_auth(vs); vnc_qmp_event(vs, QEVENT_VNC_INITIALIZED); 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]; time_t now = time(NULL); if (!vs->vd->password) { VNC_DEBUG("No password configured on server"); goto reject; } if (vs->vd->expires < now) { VNC_DEBUG("Password is expired"); goto reject; } memcpy(response, vs->challenge, VNC_AUTH_CHALLENGE_SIZE); /* Calculate the expected challenge response */ pwlen = strlen(vs->vd->password); for (i=0; ivd->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"); goto reject; } else { VNC_DEBUG("Accepting VNC challenge response\n"); vnc_write_u32(vs, 0); /* Accept auth */ vnc_flush(vs); start_client_init(vs); } return 0; reject: 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; } 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 VncRectStat *vnc_stat_rect(VncDisplay *vd, int x, int y) { struct VncSurface *vs = &vd->guest; return &vs->stats[y / VNC_STAT_RECT][x / VNC_STAT_RECT]; } void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h) { int i, j; w = (x + w) / VNC_STAT_RECT; h = (y + h) / VNC_STAT_RECT; x /= VNC_STAT_RECT; y /= VNC_STAT_RECT; for (j = y; j <= h; j++) { for (i = x; i <= w; i++) { vs->lossy_rect[j][i] = 1; } } } static int vnc_refresh_lossy_rect(VncDisplay *vd, int x, int y) { VncState *vs; int sty = y / VNC_STAT_RECT; int stx = x / VNC_STAT_RECT; int has_dirty = 0; y = y / VNC_STAT_RECT * VNC_STAT_RECT; x = x / VNC_STAT_RECT * VNC_STAT_RECT; QTAILQ_FOREACH(vs, &vd->clients, next) { int j; /* kernel send buffers are full -> refresh later */ if (vs->output.offset) { continue; } if (!vs->lossy_rect[sty][stx]) { continue; } vs->lossy_rect[sty][stx] = 0; for (j = 0; j < VNC_STAT_RECT; ++j) { bitmap_set(vs->dirty[y + j], x / 16, VNC_STAT_RECT / 16); } has_dirty++; } return has_dirty; } static int vnc_update_stats(VncDisplay *vd, struct timeval * tv) { int x, y; struct timeval res; int has_dirty = 0; for (y = 0; y < vd->guest.ds->height; y += VNC_STAT_RECT) { for (x = 0; x < vd->guest.ds->width; x += VNC_STAT_RECT) { VncRectStat *rect = vnc_stat_rect(vd, x, y); rect->updated = false; } } timersub(tv, &VNC_REFRESH_STATS, &res); if (timercmp(&vd->guest.last_freq_check, &res, >)) { return has_dirty; } vd->guest.last_freq_check = *tv; for (y = 0; y < vd->guest.ds->height; y += VNC_STAT_RECT) { for (x = 0; x < vd->guest.ds->width; x += VNC_STAT_RECT) { VncRectStat *rect= vnc_stat_rect(vd, x, y); int count = ARRAY_SIZE(rect->times); struct timeval min, max; if (!timerisset(&rect->times[count - 1])) { continue ; } max = rect->times[(rect->idx + count - 1) % count]; timersub(tv, &max, &res); if (timercmp(&res, &VNC_REFRESH_LOSSY, >)) { rect->freq = 0; has_dirty += vnc_refresh_lossy_rect(vd, x, y); memset(rect->times, 0, sizeof (rect->times)); continue ; } min = rect->times[rect->idx]; max = rect->times[(rect->idx + count - 1) % count]; timersub(&max, &min, &res); rect->freq = res.tv_sec + res.tv_usec / 1000000.; rect->freq /= count; rect->freq = 1. / rect->freq; } } return has_dirty; } double vnc_update_freq(VncState *vs, int x, int y, int w, int h) { int i, j; double total = 0; int num = 0; x = (x / VNC_STAT_RECT) * VNC_STAT_RECT; y = (y / VNC_STAT_RECT) * VNC_STAT_RECT; for (j = y; j <= y + h; j += VNC_STAT_RECT) { for (i = x; i <= x + w; i += VNC_STAT_RECT) { total += vnc_stat_rect(vs->vd, i, j)->freq; num++; } } if (num) { return total / num; } else { return 0; } } static void vnc_rect_updated(VncDisplay *vd, int x, int y, struct timeval * tv) { VncRectStat *rect; rect = vnc_stat_rect(vd, x, y); if (rect->updated) { return ; } rect->times[rect->idx] = *tv; rect->idx = (rect->idx + 1) % ARRAY_SIZE(rect->times); rect->updated = true; } static int vnc_refresh_server_surface(VncDisplay *vd) { int y; uint8_t *guest_row; uint8_t *server_row; int cmp_bytes; unsigned long width_mask[VNC_DIRTY_WORDS]; VncState *vs; int has_dirty = 0; struct timeval tv; gettimeofday(&tv, NULL); has_dirty = vnc_update_stats(vd, &tv); /* * Walk through the guest dirty map. * Check and copy modified bits from guest to server surface. * Update server dirty map. */ bitmap_set(width_mask, 0, (ds_get_width(vd->ds) / 16)); bitmap_clear(width_mask, (ds_get_width(vd->ds) / 16), VNC_DIRTY_WORDS * BITS_PER_LONG); cmp_bytes = 16 * ds_get_bytes_per_pixel(vd->ds); guest_row = vd->guest.ds->data; server_row = vd->server->data; for (y = 0; y < vd->guest.ds->height; y++) { if (bitmap_intersects(vd->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 < vd->guest.ds->width; x += 16, guest_ptr += cmp_bytes, server_ptr += cmp_bytes) { if (!test_and_clear_bit((x / 16), vd->guest.dirty[y])) continue; if (memcmp(server_ptr, guest_ptr, cmp_bytes) == 0) continue; memcpy(server_ptr, guest_ptr, cmp_bytes); vnc_rect_updated(vd, x, y, &tv); QTAILQ_FOREACH(vs, &vd->clients, next) { set_bit((x / 16), vs->dirty[y]); } has_dirty++; } } guest_row += ds_get_linesize(vd->ds); server_row += ds_get_linesize(vd->ds); } return has_dirty; } static void vnc_refresh(void *opaque) { VncDisplay *vd = opaque; VncState *vs, *vn; int has_dirty, rects = 0; vga_hw_update(); if (vnc_trylock_display(vd)) { vd->timer_interval = VNC_REFRESH_INTERVAL_BASE; qemu_mod_timer(vd->timer, qemu_get_clock(rt_clock) + vd->timer_interval); return; } has_dirty = vnc_refresh_server_surface(vd); vnc_unlock_display(vd); QTAILQ_FOREACH_SAFE(vs, &vd->clients, next, vn) { rects += vnc_update_client(vs, has_dirty); /* vs might be free()ed here */ } /* vd->timer could be NULL now if the last client disconnected, * in this case don't update the timer */ if (vd->timer == NULL) return; if (has_dirty && rects) { vd->timer_interval /= 2; if (vd->timer_interval < VNC_REFRESH_INTERVAL_BASE) vd->timer_interval = VNC_REFRESH_INTERVAL_BASE; } else { vd->timer_interval += VNC_REFRESH_INTERVAL_INC; if (vd->timer_interval > VNC_REFRESH_INTERVAL_MAX) vd->timer_interval = VNC_REFRESH_INTERVAL_MAX; } qemu_mod_timer(vd->timer, qemu_get_clock(rt_clock) + vd->timer_interval); } static void vnc_init_timer(VncDisplay *vd) { vd->timer_interval = VNC_REFRESH_INTERVAL_BASE; if (vd->timer == NULL && !QTAILQ_EMPTY(&vd->clients)) { vd->timer = qemu_new_timer(rt_clock, vnc_refresh, vd); vnc_refresh(vd); } } static void vnc_remove_timer(VncDisplay *vd) { if (vd->timer != NULL && QTAILQ_EMPTY(&vd->clients)) { qemu_del_timer(vd->timer); qemu_free_timer(vd->timer); vd->timer = NULL; } } static void vnc_connect(VncDisplay *vd, int csock) { VncState *vs = qemu_mallocz(sizeof(VncState)); int i; vs->csock = csock; vs->lossy_rect = qemu_mallocz(VNC_STAT_ROWS * sizeof (*vs->lossy_rect)); for (i = 0; i < VNC_STAT_ROWS; ++i) { vs->lossy_rect[i] = qemu_mallocz(VNC_STAT_COLS * sizeof (uint8_t)); } 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); vnc_client_cache_addr(vs); vnc_qmp_event(vs, QEVENT_VNC_CONNECTED); vs->vd = vd; vs->ds = vd->ds; 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; #ifdef CONFIG_VNC_THREAD qemu_mutex_init(&vs->output_mutex); #endif QTAILQ_INSERT_HEAD(&vd->clients, vs, next); vga_hw_update(); vnc_write(vs, "RFB 003.008\n", 12); vnc_flush(vs); vnc_read_when(vs, protocol_version, 12); reset_keys(vs); if (vs->vd->lock_key_sync) vs->led = qemu_add_led_event_handler(kbd_leds, vs); vs->mouse_mode_notifier.notify = check_pointer_type_change; qemu_add_mouse_mode_change_notifier(&vs->mouse_mode_notifier); vnc_init_timer(vd); /* vs might be free()ed here */ } 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 = qemu_accept(vs->lsock, (struct sockaddr *)&addr, &addrlen); if (csock != -1) { vnc_connect(vs, csock); } } void vnc_display_init(DisplayState *ds) { VncDisplay *vs = qemu_mallocz(sizeof(*vs)); dcl = qemu_mallocz(sizeof(DisplayChangeListener)); ds->opaque = vs; dcl->idle = 1; vnc_display = vs; vs->lsock = -1; vs->ds = ds; QTAILQ_INIT(&vs->clients); vs->expires = TIME_MAX; 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); #ifdef CONFIG_VNC_THREAD qemu_mutex_init(&vs->mutex); vnc_start_worker_thread(); #endif 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); ds->mouse_set = vnc_mouse_set; ds->cursor_define = vnc_dpy_cursor_define; } 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_disable_login(DisplayState *ds) { VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display; if (!vs) { return -1; } if (vs->password) { qemu_free(vs->password); } vs->password = NULL; vs->auth = VNC_AUTH_VNC; return 0; } int vnc_display_password(DisplayState *ds, const char *password) { VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display; if (!vs) { return -1; } if (!password) { /* This is not the intention of this interface but err on the side of being safe */ return vnc_display_disable_login(ds); } if (vs->password) { qemu_free(vs->password); vs->password = NULL; } vs->password = qemu_strdup(password); vs->auth = VNC_AUTH_VNC; return 0; } int vnc_display_pw_expire(DisplayState *ds, time_t expires) { VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display; vs->expires = expires; 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; #ifdef CONFIG_VNC_TLS int tls = 0, x509 = 0; #endif #ifdef CONFIG_VNC_SASL int sasl = 0; int saslErr; #endif #if defined(CONFIG_VNC_TLS) || defined(CONFIG_VNC_SASL) int acl = 0; #endif int lock_key_sync = 1; 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, "no-lock-key-sync", 9) == 0) { lock_key_sync = 0; #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 #if defined(CONFIG_VNC_TLS) || defined(CONFIG_VNC_SASL) } else if (strncmp(options, "acl", 3) == 0) { acl = 1; #endif } else if (strncmp(options, "lossy", 5) == 0) { vs->lossy = true; } } #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 vs->lock_key_sync = lock_key_sync; 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); }