Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 1 | /* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved. |
Pierre Ossman | b53c3bf | 2018-03-22 16:01:44 +0100 | [diff] [blame] | 2 | * Copyright 2009-2018 Pierre Ossman for Cendio AB |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 3 | * |
| 4 | * This is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This software is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this software; if not, write to the Free Software |
| 16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
| 17 | * USA. |
| 18 | */ |
| 19 | |
| 20 | // -=- Single-Threaded VNC Server implementation |
| 21 | |
| 22 | |
| 23 | // Note about how sockets get closed: |
| 24 | // |
| 25 | // Closing sockets to clients is non-trivial because the code which calls |
| 26 | // VNCServerST must explicitly know about all the sockets (so that it can block |
| 27 | // on them appropriately). However, VNCServerST may want to close clients for |
| 28 | // a number of reasons, and from a variety of entry points. The simplest is |
| 29 | // when processSocketEvent() is called for a client, and the remote end has |
| 30 | // closed its socket. A more complex reason is when processSocketEvent() is |
| 31 | // called for a client which has just sent a ClientInit with the shared flag |
| 32 | // set to false - in this case we want to close all other clients. Yet another |
| 33 | // reason for disconnecting clients is when the desktop size has changed as a |
| 34 | // result of a call to setPixelBuffer(). |
| 35 | // |
| 36 | // The responsibility for creating and deleting sockets is entirely with the |
| 37 | // calling code. When VNCServerST wants to close a connection to a client it |
| 38 | // calls the VNCSConnectionST's close() method which calls shutdown() on the |
| 39 | // socket. Eventually the calling code will notice that the socket has been |
| 40 | // shut down and call removeSocket() so that we can delete the |
| 41 | // VNCSConnectionST. Note that the socket must not be deleted by the calling |
| 42 | // code until after removeSocket() has been called. |
| 43 | // |
| 44 | // One minor complication is that we don't allocate a VNCSConnectionST object |
| 45 | // for a blacklisted host (since we want to minimise the resources used for |
| 46 | // dealing with such a connection). In order to properly implement the |
| 47 | // getSockets function, we must maintain a separate closingSockets list, |
| 48 | // otherwise blacklisted connections might be "forgotten". |
| 49 | |
| 50 | |
Pierre Ossman | 559a2e8 | 2012-01-23 15:54:11 +0000 | [diff] [blame] | 51 | #include <assert.h> |
Pierre Ossman | f99c571 | 2009-03-13 14:41:27 +0000 | [diff] [blame] | 52 | #include <stdlib.h> |
| 53 | |
Pierre Ossman | 707fa12 | 2015-12-11 20:21:20 +0100 | [diff] [blame] | 54 | #include <rfb/ComparingUpdateTracker.h> |
| 55 | #include <rfb/KeyRemapper.h> |
Pierre Ossman | 6c97fa4 | 2018-10-05 17:35:51 +0200 | [diff] [blame] | 56 | #include <rfb/LogWriter.h> |
Pierre Ossman | 707fa12 | 2015-12-11 20:21:20 +0100 | [diff] [blame] | 57 | #include <rfb/Security.h> |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 58 | #include <rfb/ServerCore.h> |
| 59 | #include <rfb/VNCServerST.h> |
| 60 | #include <rfb/VNCSConnectionST.h> |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 61 | #include <rfb/util.h> |
Pierre Ossman | bb305ca | 2016-12-11 12:41:26 +0100 | [diff] [blame] | 62 | #include <rfb/ledStates.h> |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 63 | |
| 64 | #include <rdr/types.h> |
| 65 | |
| 66 | using namespace rfb; |
| 67 | |
| 68 | static LogWriter slog("VNCServerST"); |
Pierre Ossman | 6c97fa4 | 2018-10-05 17:35:51 +0200 | [diff] [blame] | 69 | static LogWriter connectionsLog("Connections"); |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 70 | |
| 71 | // |
| 72 | // -=- VNCServerST Implementation |
| 73 | // |
| 74 | |
| 75 | // -=- Constructors/Destructor |
| 76 | |
Adam Tkac | a6578bf | 2010-04-23 14:07:41 +0000 | [diff] [blame] | 77 | VNCServerST::VNCServerST(const char* name_, SDesktop* desktop_) |
Pierre Ossman | 559a2e8 | 2012-01-23 15:54:11 +0000 | [diff] [blame] | 78 | : blHosts(&blacklist), desktop(desktop_), desktopStarted(false), |
Pierre Ossman | bb305ca | 2016-12-11 12:41:26 +0100 | [diff] [blame] | 79 | blockCounter(0), pb(0), ledState(ledUnknown), |
Adam Tkac | d36b626 | 2009-09-04 10:57:20 +0000 | [diff] [blame] | 80 | name(strDup(name_)), pointerClient(0), comparer(0), |
Pierre Ossman | 6a1a0d0 | 2017-02-19 15:48:17 +0100 | [diff] [blame] | 81 | cursor(new Cursor(0, 0, Point(), NULL)), |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 82 | renderedCursorInvalid(false), |
Pierre Ossman | eef6c9a | 2018-10-05 17:11:25 +0200 | [diff] [blame] | 83 | keyRemapper(&KeyRemapper::defInstance), |
Pierre Ossman | f43137c | 2018-10-26 15:34:03 +0200 | [diff] [blame^] | 84 | idleTimer(this), disconnectTimer(this), connectTimer(this), |
| 85 | frameTimer(this) |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 86 | { |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 87 | slog.debug("creating single-threaded server %s", name.buf); |
Pierre Ossman | f43137c | 2018-10-26 15:34:03 +0200 | [diff] [blame^] | 88 | |
| 89 | // FIXME: Do we really want to kick off these right away? |
| 90 | if (rfb::Server::maxIdleTime) |
| 91 | idleTimer.start(secsToMillis(rfb::Server::maxIdleTime)); |
| 92 | if (rfb::Server::maxDisconnectionTime) |
| 93 | disconnectTimer.start(secsToMillis(rfb::Server::maxDisconnectionTime)); |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | VNCServerST::~VNCServerST() |
| 97 | { |
| 98 | slog.debug("shutting down server %s", name.buf); |
| 99 | |
| 100 | // Close any active clients, with appropriate logging & cleanup |
| 101 | closeClients("Server shutdown"); |
| 102 | |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 103 | // Stop trying to render things |
| 104 | stopFrameClock(); |
| 105 | |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 106 | // Delete all the clients, and their sockets, and any closing sockets |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 107 | while (!clients.empty()) { |
Pierre Ossman | 6c97fa4 | 2018-10-05 17:35:51 +0200 | [diff] [blame] | 108 | VNCSConnectionST* client; |
| 109 | client = clients.front(); |
| 110 | clients.pop_front(); |
| 111 | delete client; |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 112 | } |
| 113 | |
| 114 | // Stop the desktop object if active, *only* after deleting all clients! |
Pierre Ossman | b53c3bf | 2018-03-22 16:01:44 +0100 | [diff] [blame] | 115 | stopDesktop(); |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 116 | |
Pierre Ossman | 05338bc | 2016-11-08 14:57:11 +0100 | [diff] [blame] | 117 | if (comparer) |
| 118 | comparer->logStats(); |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 119 | delete comparer; |
Pierre Ossman | 6a1a0d0 | 2017-02-19 15:48:17 +0100 | [diff] [blame] | 120 | |
| 121 | delete cursor; |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 122 | } |
| 123 | |
| 124 | |
| 125 | // SocketServer methods |
| 126 | |
| 127 | void VNCServerST::addSocket(network::Socket* sock, bool outgoing) |
| 128 | { |
| 129 | // - Check the connection isn't black-marked |
| 130 | // *** do this in getSecurity instead? |
| 131 | CharArray address(sock->getPeerAddress()); |
| 132 | if (blHosts->isBlackmarked(address.buf)) { |
| 133 | connectionsLog.error("blacklisted: %s", address.buf); |
| 134 | try { |
Pierre Ossman | 4bba246 | 2018-10-11 07:52:50 +0200 | [diff] [blame] | 135 | rdr::OutStream& os = sock->outStream(); |
| 136 | |
| 137 | // Shortest possible way to tell a client it is not welcome |
| 138 | os.writeBytes("RFB 003.003\n", 12); |
| 139 | os.writeU32(0); |
| 140 | os.writeString("Too many security failures"); |
| 141 | os.flush(); |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 142 | } catch (rdr::Exception&) { |
| 143 | } |
| 144 | sock->shutdown(); |
| 145 | closingSockets.push_back(sock); |
| 146 | return; |
| 147 | } |
| 148 | |
Pierre Ossman | 6c97fa4 | 2018-10-05 17:35:51 +0200 | [diff] [blame] | 149 | CharArray name; |
| 150 | name.buf = sock->getPeerEndpoint(); |
| 151 | connectionsLog.status("accepted: %s", name.buf); |
| 152 | |
Pierre Ossman | f43137c | 2018-10-26 15:34:03 +0200 | [diff] [blame^] | 153 | // Adjust the exit timers |
| 154 | if (rfb::Server::maxConnectionTime && clients.empty()) |
| 155 | connectTimer.start(secsToMillis(rfb::Server::maxConnectionTime)); |
| 156 | disconnectTimer.stop(); |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 157 | |
| 158 | VNCSConnectionST* client = new VNCSConnectionST(this, sock, outgoing); |
Pierre Ossman | 6c97fa4 | 2018-10-05 17:35:51 +0200 | [diff] [blame] | 159 | clients.push_front(client); |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 160 | client->init(); |
| 161 | } |
| 162 | |
| 163 | void VNCServerST::removeSocket(network::Socket* sock) { |
| 164 | // - If the socket has resources allocated to it, delete them |
| 165 | std::list<VNCSConnectionST*>::iterator ci; |
| 166 | for (ci = clients.begin(); ci != clients.end(); ci++) { |
| 167 | if ((*ci)->getSock() == sock) { |
Pierre Ossman | 6c97fa4 | 2018-10-05 17:35:51 +0200 | [diff] [blame] | 168 | clients.remove(*ci); |
| 169 | |
Pierre Ossman | b684341 | 2018-10-05 17:30:52 +0200 | [diff] [blame] | 170 | // - Release the cursor if this client owns it |
| 171 | if (pointerClient == *ci) |
| 172 | pointerClient = NULL; |
| 173 | |
Pierre Ossman | f43137c | 2018-10-26 15:34:03 +0200 | [diff] [blame^] | 174 | // Adjust the exit timers |
| 175 | connectTimer.stop(); |
| 176 | if (rfb::Server::maxDisconnectionTime && clients.empty()) |
| 177 | disconnectTimer.start(secsToMillis(rfb::Server::maxDisconnectionTime)); |
Pierre Ossman | 6c97fa4 | 2018-10-05 17:35:51 +0200 | [diff] [blame] | 178 | |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 179 | // - Delete the per-Socket resources |
| 180 | delete *ci; |
| 181 | |
Pierre Ossman | 6c97fa4 | 2018-10-05 17:35:51 +0200 | [diff] [blame] | 182 | CharArray name; |
| 183 | name.buf = sock->getPeerEndpoint(); |
| 184 | connectionsLog.status("closed: %s", name.buf); |
| 185 | |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 186 | // - Check that the desktop object is still required |
Pierre Ossman | b53c3bf | 2018-03-22 16:01:44 +0100 | [diff] [blame] | 187 | if (authClientCount() == 0) |
| 188 | stopDesktop(); |
Pierre Ossman | 05338bc | 2016-11-08 14:57:11 +0100 | [diff] [blame] | 189 | |
| 190 | if (comparer) |
| 191 | comparer->logStats(); |
| 192 | |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 193 | return; |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | // - If the Socket has no resources, it may have been a closingSocket |
| 198 | closingSockets.remove(sock); |
| 199 | } |
| 200 | |
Pierre Ossman | d408ca5 | 2016-04-29 14:26:05 +0200 | [diff] [blame] | 201 | void VNCServerST::processSocketReadEvent(network::Socket* sock) |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 202 | { |
| 203 | // - Find the appropriate VNCSConnectionST and process the event |
| 204 | std::list<VNCSConnectionST*>::iterator ci; |
| 205 | for (ci = clients.begin(); ci != clients.end(); ci++) { |
| 206 | if ((*ci)->getSock() == sock) { |
| 207 | (*ci)->processMessages(); |
| 208 | return; |
| 209 | } |
| 210 | } |
| 211 | throw rdr::Exception("invalid Socket in VNCServerST"); |
| 212 | } |
| 213 | |
Pierre Ossman | d408ca5 | 2016-04-29 14:26:05 +0200 | [diff] [blame] | 214 | void VNCServerST::processSocketWriteEvent(network::Socket* sock) |
| 215 | { |
| 216 | // - Find the appropriate VNCSConnectionST and process the event |
| 217 | std::list<VNCSConnectionST*>::iterator ci; |
| 218 | for (ci = clients.begin(); ci != clients.end(); ci++) { |
| 219 | if ((*ci)->getSock() == sock) { |
| 220 | (*ci)->flushSocket(); |
| 221 | return; |
| 222 | } |
| 223 | } |
| 224 | throw rdr::Exception("invalid Socket in VNCServerST"); |
| 225 | } |
| 226 | |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 227 | int VNCServerST::checkTimeouts() |
| 228 | { |
| 229 | int timeout = 0; |
| 230 | std::list<VNCSConnectionST*>::iterator ci, ci_next; |
Pierre Ossman | 2d61deb | 2011-10-25 15:18:53 +0000 | [diff] [blame] | 231 | |
| 232 | soonestTimeout(&timeout, Timer::checkTimeouts()); |
| 233 | |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 234 | for (ci=clients.begin();ci!=clients.end();ci=ci_next) { |
| 235 | ci_next = ci; ci_next++; |
| 236 | soonestTimeout(&timeout, (*ci)->checkIdleTimeout()); |
| 237 | } |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 238 | |
| 239 | return timeout; |
| 240 | } |
| 241 | |
| 242 | |
| 243 | // VNCServer methods |
| 244 | |
Pierre Ossman | 559a2e8 | 2012-01-23 15:54:11 +0000 | [diff] [blame] | 245 | void VNCServerST::blockUpdates() |
| 246 | { |
| 247 | blockCounter++; |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 248 | |
| 249 | stopFrameClock(); |
Pierre Ossman | 559a2e8 | 2012-01-23 15:54:11 +0000 | [diff] [blame] | 250 | } |
| 251 | |
| 252 | void VNCServerST::unblockUpdates() |
| 253 | { |
| 254 | assert(blockCounter > 0); |
| 255 | |
| 256 | blockCounter--; |
| 257 | |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 258 | // Restart the frame clock if we have updates |
| 259 | if (blockCounter == 0) { |
| 260 | if (!comparer->is_empty()) |
| 261 | startFrameClock(); |
| 262 | } |
Pierre Ossman | 559a2e8 | 2012-01-23 15:54:11 +0000 | [diff] [blame] | 263 | } |
| 264 | |
Pierre Ossman | 04e62db | 2009-03-23 16:57:07 +0000 | [diff] [blame] | 265 | void VNCServerST::setPixelBuffer(PixelBuffer* pb_, const ScreenSet& layout) |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 266 | { |
Pierre Ossman | 05338bc | 2016-11-08 14:57:11 +0100 | [diff] [blame] | 267 | if (comparer) |
| 268 | comparer->logStats(); |
| 269 | |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 270 | pb = pb_; |
| 271 | delete comparer; |
| 272 | comparer = 0; |
| 273 | |
Pierre Ossman | 04e62db | 2009-03-23 16:57:07 +0000 | [diff] [blame] | 274 | screenLayout = layout; |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 275 | |
Pierre Ossman | 04e62db | 2009-03-23 16:57:07 +0000 | [diff] [blame] | 276 | if (!pb) { |
Michal Srb | 28d570d | 2017-09-29 14:45:33 +0200 | [diff] [blame] | 277 | screenLayout = ScreenSet(); |
| 278 | |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 279 | if (desktopStarted) |
| 280 | throw Exception("setPixelBuffer: null PixelBuffer when desktopStarted?"); |
Michal Srb | 28d570d | 2017-09-29 14:45:33 +0200 | [diff] [blame] | 281 | |
Pierre Ossman | 04e62db | 2009-03-23 16:57:07 +0000 | [diff] [blame] | 282 | return; |
| 283 | } |
| 284 | |
Pierre Ossman | 6cd6117 | 2018-05-07 14:24:56 +0200 | [diff] [blame] | 285 | // Assume the framebuffer contents wasn't saved and reset everything |
| 286 | // that tracks its contents |
Pierre Ossman | 04e62db | 2009-03-23 16:57:07 +0000 | [diff] [blame] | 287 | comparer = new ComparingUpdateTracker(pb); |
Pierre Ossman | 6ea6e1a | 2014-02-12 16:33:43 +0100 | [diff] [blame] | 288 | renderedCursorInvalid = true; |
Pierre Ossman | 6cd6117 | 2018-05-07 14:24:56 +0200 | [diff] [blame] | 289 | add_changed(pb->getRect()); |
Pierre Ossman | 04e62db | 2009-03-23 16:57:07 +0000 | [diff] [blame] | 290 | |
| 291 | // Make sure that we have at least one screen |
| 292 | if (screenLayout.num_screens() == 0) |
| 293 | screenLayout.add_screen(Screen(0, 0, 0, pb->width(), pb->height(), 0)); |
| 294 | |
| 295 | std::list<VNCSConnectionST*>::iterator ci, ci_next; |
| 296 | for (ci=clients.begin();ci!=clients.end();ci=ci_next) { |
| 297 | ci_next = ci; ci_next++; |
| 298 | (*ci)->pixelBufferChange(); |
| 299 | // Since the new pixel buffer means an ExtendedDesktopSize needs to |
| 300 | // be sent anyway, we don't need to call screenLayoutChange. |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | void VNCServerST::setPixelBuffer(PixelBuffer* pb_) |
| 305 | { |
Michal Srb | 28d570d | 2017-09-29 14:45:33 +0200 | [diff] [blame] | 306 | ScreenSet layout = screenLayout; |
Pierre Ossman | 04e62db | 2009-03-23 16:57:07 +0000 | [diff] [blame] | 307 | |
| 308 | // Check that the screen layout is still valid |
Michal Srb | 28d570d | 2017-09-29 14:45:33 +0200 | [diff] [blame] | 309 | if (pb_ && !layout.validate(pb_->width(), pb_->height())) { |
Pierre Ossman | 04e62db | 2009-03-23 16:57:07 +0000 | [diff] [blame] | 310 | Rect fbRect; |
| 311 | ScreenSet::iterator iter, iter_next; |
| 312 | |
| 313 | fbRect.setXYWH(0, 0, pb_->width(), pb_->height()); |
| 314 | |
| 315 | for (iter = layout.begin();iter != layout.end();iter = iter_next) { |
| 316 | iter_next = iter; ++iter_next; |
| 317 | if (iter->dimensions.enclosed_by(fbRect)) |
| 318 | continue; |
| 319 | iter->dimensions = iter->dimensions.intersect(fbRect); |
| 320 | if (iter->dimensions.is_empty()) { |
| 321 | slog.info("Removing screen %d (%x) as it is completely outside the new framebuffer", |
| 322 | (int)iter->id, (unsigned)iter->id); |
| 323 | layout.remove_screen(iter->id); |
| 324 | } |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | setPixelBuffer(pb_, layout); |
| 329 | } |
| 330 | |
| 331 | void VNCServerST::setScreenLayout(const ScreenSet& layout) |
| 332 | { |
| 333 | if (!pb) |
| 334 | throw Exception("setScreenLayout: new screen layout without a PixelBuffer"); |
| 335 | if (!layout.validate(pb->width(), pb->height())) |
| 336 | throw Exception("setScreenLayout: invalid screen layout"); |
| 337 | |
Pierre Ossman | df45320 | 2009-04-02 14:26:45 +0000 | [diff] [blame] | 338 | screenLayout = layout; |
| 339 | |
Pierre Ossman | 04e62db | 2009-03-23 16:57:07 +0000 | [diff] [blame] | 340 | std::list<VNCSConnectionST*>::iterator ci, ci_next; |
| 341 | for (ci=clients.begin();ci!=clients.end();ci=ci_next) { |
| 342 | ci_next = ci; ci_next++; |
Pierre Ossman | a3ac01e | 2011-11-07 21:13:54 +0000 | [diff] [blame] | 343 | (*ci)->screenLayoutChangeOrClose(reasonServer); |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 344 | } |
| 345 | } |
| 346 | |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 347 | void VNCServerST::bell() |
| 348 | { |
| 349 | std::list<VNCSConnectionST*>::iterator ci, ci_next; |
| 350 | for (ci = clients.begin(); ci != clients.end(); ci = ci_next) { |
| 351 | ci_next = ci; ci_next++; |
Pierre Ossman | a3ac01e | 2011-11-07 21:13:54 +0000 | [diff] [blame] | 352 | (*ci)->bellOrClose(); |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 353 | } |
| 354 | } |
| 355 | |
| 356 | void VNCServerST::serverCutText(const char* str, int len) |
| 357 | { |
| 358 | std::list<VNCSConnectionST*>::iterator ci, ci_next; |
| 359 | for (ci = clients.begin(); ci != clients.end(); ci = ci_next) { |
| 360 | ci_next = ci; ci_next++; |
Pierre Ossman | a3ac01e | 2011-11-07 21:13:54 +0000 | [diff] [blame] | 361 | (*ci)->serverCutTextOrClose(str, len); |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 362 | } |
| 363 | } |
| 364 | |
Peter Ã…strand | c39e078 | 2009-01-15 12:21:42 +0000 | [diff] [blame] | 365 | void VNCServerST::setName(const char* name_) |
| 366 | { |
Adam Tkac | d36b626 | 2009-09-04 10:57:20 +0000 | [diff] [blame] | 367 | name.replaceBuf(strDup(name_)); |
Peter Ã…strand | c39e078 | 2009-01-15 12:21:42 +0000 | [diff] [blame] | 368 | std::list<VNCSConnectionST*>::iterator ci, ci_next; |
| 369 | for (ci = clients.begin(); ci != clients.end(); ci = ci_next) { |
| 370 | ci_next = ci; ci_next++; |
Pierre Ossman | a3ac01e | 2011-11-07 21:13:54 +0000 | [diff] [blame] | 371 | (*ci)->setDesktopNameOrClose(name_); |
Peter Ã…strand | c39e078 | 2009-01-15 12:21:42 +0000 | [diff] [blame] | 372 | } |
| 373 | } |
| 374 | |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 375 | void VNCServerST::add_changed(const Region& region) |
| 376 | { |
Pierre Ossman | bbf955e | 2011-11-08 12:44:10 +0000 | [diff] [blame] | 377 | if (comparer == NULL) |
| 378 | return; |
| 379 | |
| 380 | comparer->add_changed(region); |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 381 | startFrameClock(); |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 382 | } |
| 383 | |
| 384 | void VNCServerST::add_copied(const Region& dest, const Point& delta) |
| 385 | { |
Pierre Ossman | bbf955e | 2011-11-08 12:44:10 +0000 | [diff] [blame] | 386 | if (comparer == NULL) |
| 387 | return; |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 388 | |
Pierre Ossman | bbf955e | 2011-11-08 12:44:10 +0000 | [diff] [blame] | 389 | comparer->add_copied(dest, delta); |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 390 | startFrameClock(); |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 391 | } |
| 392 | |
| 393 | void VNCServerST::setCursor(int width, int height, const Point& newHotspot, |
Pierre Ossman | 6a1a0d0 | 2017-02-19 15:48:17 +0100 | [diff] [blame] | 394 | const rdr::U8* data) |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 395 | { |
Pierre Ossman | 6a1a0d0 | 2017-02-19 15:48:17 +0100 | [diff] [blame] | 396 | delete cursor; |
| 397 | cursor = new Cursor(width, height, newHotspot, data); |
| 398 | cursor->crop(); |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 399 | |
| 400 | renderedCursorInvalid = true; |
| 401 | |
| 402 | std::list<VNCSConnectionST*>::iterator ci, ci_next; |
| 403 | for (ci = clients.begin(); ci != clients.end(); ci = ci_next) { |
| 404 | ci_next = ci; ci_next++; |
| 405 | (*ci)->renderedCursorChange(); |
| 406 | (*ci)->setCursorOrClose(); |
| 407 | } |
| 408 | } |
| 409 | |
| 410 | void VNCServerST::setCursorPos(const Point& pos) |
| 411 | { |
| 412 | if (!cursorPos.equals(pos)) { |
| 413 | cursorPos = pos; |
| 414 | renderedCursorInvalid = true; |
| 415 | std::list<VNCSConnectionST*>::iterator ci; |
| 416 | for (ci = clients.begin(); ci != clients.end(); ci++) |
| 417 | (*ci)->renderedCursorChange(); |
| 418 | } |
| 419 | } |
| 420 | |
Pierre Ossman | bb305ca | 2016-12-11 12:41:26 +0100 | [diff] [blame] | 421 | void VNCServerST::setLEDState(unsigned int state) |
| 422 | { |
Pierre Ossman | b45a84f | 2016-12-12 16:59:15 +0100 | [diff] [blame] | 423 | std::list<VNCSConnectionST*>::iterator ci, ci_next; |
| 424 | |
| 425 | if (state == ledState) |
| 426 | return; |
| 427 | |
Pierre Ossman | bb305ca | 2016-12-11 12:41:26 +0100 | [diff] [blame] | 428 | ledState = state; |
Pierre Ossman | b45a84f | 2016-12-12 16:59:15 +0100 | [diff] [blame] | 429 | |
| 430 | for (ci = clients.begin(); ci != clients.end(); ci = ci_next) { |
| 431 | ci_next = ci; ci_next++; |
| 432 | (*ci)->setLEDStateOrClose(state); |
| 433 | } |
Pierre Ossman | bb305ca | 2016-12-11 12:41:26 +0100 | [diff] [blame] | 434 | } |
| 435 | |
Pierre Ossman | b684341 | 2018-10-05 17:30:52 +0200 | [diff] [blame] | 436 | // Event handlers |
| 437 | |
| 438 | void VNCServerST::keyEvent(rdr::U32 keysym, rdr::U32 keycode, bool down) |
| 439 | { |
Pierre Ossman | f43137c | 2018-10-26 15:34:03 +0200 | [diff] [blame^] | 440 | if (rfb::Server::maxIdleTime) |
| 441 | idleTimer.start(secsToMillis(rfb::Server::maxIdleTime)); |
Pierre Ossman | b684341 | 2018-10-05 17:30:52 +0200 | [diff] [blame] | 442 | |
| 443 | // Remap the key if required |
| 444 | if (keyRemapper) { |
| 445 | rdr::U32 newkey; |
| 446 | newkey = keyRemapper->remapKey(keysym); |
| 447 | if (newkey != keysym) { |
| 448 | slog.debug("Key remapped to 0x%x", newkey); |
| 449 | keysym = newkey; |
| 450 | } |
| 451 | } |
| 452 | |
| 453 | desktop->keyEvent(keysym, keycode, down); |
| 454 | } |
| 455 | |
| 456 | void VNCServerST::pointerEvent(VNCSConnectionST* client, |
| 457 | const Point& pos, int buttonMask) |
| 458 | { |
Pierre Ossman | f43137c | 2018-10-26 15:34:03 +0200 | [diff] [blame^] | 459 | if (rfb::Server::maxIdleTime) |
| 460 | idleTimer.start(secsToMillis(rfb::Server::maxIdleTime)); |
Pierre Ossman | b684341 | 2018-10-05 17:30:52 +0200 | [diff] [blame] | 461 | |
| 462 | // Let one client own the cursor whilst buttons are pressed in order |
| 463 | // to provide a bit more sane user experience |
| 464 | if ((pointerClient != NULL) && (pointerClient != client)) |
| 465 | return; |
| 466 | |
| 467 | if (buttonMask) |
| 468 | pointerClient = client; |
| 469 | else |
| 470 | pointerClient = NULL; |
| 471 | |
| 472 | desktop->pointerEvent(pos, buttonMask); |
| 473 | } |
| 474 | |
| 475 | void VNCServerST::clientCutText(const char* str, int len) |
| 476 | { |
| 477 | desktop->clientCutText(str, len); |
| 478 | } |
| 479 | |
Pierre Ossman | 07e44cc | 2018-10-05 17:32:57 +0200 | [diff] [blame] | 480 | unsigned int VNCServerST::setDesktopSize(VNCSConnectionST* requester, |
| 481 | int fb_width, int fb_height, |
| 482 | const ScreenSet& layout) |
| 483 | { |
| 484 | unsigned int result; |
| 485 | std::list<VNCSConnectionST*>::iterator ci, ci_next; |
| 486 | |
| 487 | // Don't bother the desktop with an invalid configuration |
| 488 | if (!layout.validate(fb_width, fb_height)) |
| 489 | return resultInvalid; |
| 490 | |
| 491 | // FIXME: the desktop will call back to VNCServerST and an extra set |
| 492 | // of ExtendedDesktopSize messages will be sent. This is okay |
| 493 | // protocol-wise, but unnecessary. |
| 494 | result = desktop->setScreenLayout(fb_width, fb_height, layout); |
| 495 | if (result != resultSuccess) |
| 496 | return result; |
| 497 | |
| 498 | // Sanity check |
| 499 | if (screenLayout != layout) |
| 500 | throw Exception("Desktop configured a different screen layout than requested"); |
| 501 | |
| 502 | // Notify other clients |
| 503 | for (ci=clients.begin();ci!=clients.end();ci=ci_next) { |
| 504 | ci_next = ci; ci_next++; |
| 505 | if ((*ci) == requester) |
| 506 | continue; |
| 507 | (*ci)->screenLayoutChangeOrClose(reasonOtherClient); |
| 508 | } |
| 509 | |
| 510 | return resultSuccess; |
| 511 | } |
| 512 | |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 513 | // Other public methods |
| 514 | |
| 515 | void VNCServerST::approveConnection(network::Socket* sock, bool accept, |
| 516 | const char* reason) |
| 517 | { |
| 518 | std::list<VNCSConnectionST*>::iterator ci; |
| 519 | for (ci = clients.begin(); ci != clients.end(); ci++) { |
| 520 | if ((*ci)->getSock() == sock) { |
| 521 | (*ci)->approveConnectionOrClose(accept, reason); |
| 522 | return; |
| 523 | } |
| 524 | } |
| 525 | } |
| 526 | |
| 527 | void VNCServerST::closeClients(const char* reason, network::Socket* except) |
| 528 | { |
| 529 | std::list<VNCSConnectionST*>::iterator i, next_i; |
| 530 | for (i=clients.begin(); i!=clients.end(); i=next_i) { |
| 531 | next_i = i; next_i++; |
| 532 | if ((*i)->getSock() != except) |
| 533 | (*i)->close(reason); |
| 534 | } |
| 535 | } |
| 536 | |
| 537 | void VNCServerST::getSockets(std::list<network::Socket*>* sockets) |
| 538 | { |
| 539 | sockets->clear(); |
| 540 | std::list<VNCSConnectionST*>::iterator ci; |
| 541 | for (ci = clients.begin(); ci != clients.end(); ci++) { |
| 542 | sockets->push_back((*ci)->getSock()); |
| 543 | } |
| 544 | std::list<network::Socket*>::iterator si; |
| 545 | for (si = closingSockets.begin(); si != closingSockets.end(); si++) { |
| 546 | sockets->push_back(*si); |
| 547 | } |
| 548 | } |
| 549 | |
Pierre Ossman | 7d64b33 | 2018-10-08 15:59:02 +0200 | [diff] [blame] | 550 | SConnection* VNCServerST::getConnection(network::Socket* sock) { |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 551 | std::list<VNCSConnectionST*>::iterator ci; |
| 552 | for (ci = clients.begin(); ci != clients.end(); ci++) { |
| 553 | if ((*ci)->getSock() == sock) |
| 554 | return *ci; |
| 555 | } |
| 556 | return 0; |
| 557 | } |
| 558 | |
Pierre Ossman | bbf955e | 2011-11-08 12:44:10 +0000 | [diff] [blame] | 559 | bool VNCServerST::handleTimeout(Timer* t) |
| 560 | { |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 561 | if (t == &frameTimer) { |
| 562 | // We keep running until we go a full interval without any updates |
| 563 | if (comparer->is_empty()) |
| 564 | return false; |
Pierre Ossman | bbf955e | 2011-11-08 12:44:10 +0000 | [diff] [blame] | 565 | |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 566 | writeUpdate(); |
Pierre Ossman | 7be73d7 | 2017-11-06 13:16:35 +0100 | [diff] [blame] | 567 | |
| 568 | // If this is the first iteration then we need to adjust the timeout |
| 569 | if (frameTimer.getTimeoutMs() != 1000/rfb::Server::frameRate) { |
| 570 | frameTimer.start(1000/rfb::Server::frameRate); |
| 571 | return false; |
| 572 | } |
| 573 | |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 574 | return true; |
Pierre Ossman | f43137c | 2018-10-26 15:34:03 +0200 | [diff] [blame^] | 575 | } else if (t == &idleTimer) { |
| 576 | slog.info("MaxIdleTime reached, exiting"); |
| 577 | exit(0); |
| 578 | } else if (t == &disconnectTimer) { |
| 579 | slog.info("MaxDisconnectionTime reached, exiting"); |
| 580 | exit(0); |
| 581 | } else if (t == &connectTimer) { |
| 582 | slog.info("MaxConnectionTime reached, exiting"); |
| 583 | exit(0); |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 584 | } |
Pierre Ossman | bbf955e | 2011-11-08 12:44:10 +0000 | [diff] [blame] | 585 | |
| 586 | return false; |
| 587 | } |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 588 | |
Pierre Ossman | 6c97fa4 | 2018-10-05 17:35:51 +0200 | [diff] [blame] | 589 | void VNCServerST::queryConnection(VNCSConnectionST* client, |
Pierre Ossman | eef6c9a | 2018-10-05 17:11:25 +0200 | [diff] [blame] | 590 | const char* userName) |
| 591 | { |
Pierre Ossman | 6c97fa4 | 2018-10-05 17:35:51 +0200 | [diff] [blame] | 592 | // - Authentication succeeded - clear from blacklist |
| 593 | CharArray name; |
| 594 | name.buf = client->getSock()->getPeerAddress(); |
| 595 | blHosts->clearBlackmark(name.buf); |
| 596 | |
| 597 | // - Prepare the desktop for that the client will start requiring |
| 598 | // resources after this |
| 599 | startDesktop(); |
| 600 | |
| 601 | // - Special case to provide a more useful error message |
| 602 | if (rfb::Server::neverShared && |
| 603 | !rfb::Server::disconnectClients && |
| 604 | authClientCount() > 0) { |
| 605 | approveConnection(client->getSock(), false, |
| 606 | "The server is already in use"); |
| 607 | return; |
| 608 | } |
| 609 | |
| 610 | // - Are we configured to do queries? |
| 611 | if (!rfb::Server::queryConnect && |
| 612 | !client->getSock()->requiresQuery()) { |
| 613 | approveConnection(client->getSock(), true, NULL); |
| 614 | return; |
| 615 | } |
| 616 | |
| 617 | // - Does the client have the right to bypass the query? |
| 618 | if (client->accessCheck(SConnection::AccessNoQuery)) |
| 619 | { |
| 620 | approveConnection(client->getSock(), true, NULL); |
| 621 | return; |
| 622 | } |
| 623 | |
| 624 | desktop->queryConnection(client->getSock(), userName); |
| 625 | } |
| 626 | |
| 627 | void VNCServerST::clientReady(VNCSConnectionST* client, bool shared) |
| 628 | { |
| 629 | if (!shared) { |
| 630 | if (rfb::Server::disconnectClients && |
| 631 | client->accessCheck(SConnection::AccessNonShared)) { |
| 632 | // - Close all the other connected clients |
| 633 | slog.debug("non-shared connection - closing clients"); |
| 634 | closeClients("Non-shared connection requested", client->getSock()); |
| 635 | } else { |
| 636 | // - Refuse this connection if there are existing clients, in addition to |
| 637 | // this one |
| 638 | if (authClientCount() > 1) { |
| 639 | client->close("Server is already in use"); |
| 640 | return; |
| 641 | } |
| 642 | } |
| 643 | } |
Pierre Ossman | eef6c9a | 2018-10-05 17:11:25 +0200 | [diff] [blame] | 644 | } |
| 645 | |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 646 | // -=- Internal methods |
| 647 | |
| 648 | void VNCServerST::startDesktop() |
| 649 | { |
| 650 | if (!desktopStarted) { |
| 651 | slog.debug("starting desktop"); |
| 652 | desktop->start(this); |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 653 | if (!pb) |
| 654 | throw Exception("SDesktop::start() did not set a valid PixelBuffer"); |
Pierre Ossman | 6cd6117 | 2018-05-07 14:24:56 +0200 | [diff] [blame] | 655 | desktopStarted = true; |
| 656 | // The tracker might have accumulated changes whilst we were |
| 657 | // stopped, so flush those out |
| 658 | if (!comparer->is_empty()) |
| 659 | writeUpdate(); |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 660 | } |
| 661 | } |
| 662 | |
Pierre Ossman | b53c3bf | 2018-03-22 16:01:44 +0100 | [diff] [blame] | 663 | void VNCServerST::stopDesktop() |
| 664 | { |
| 665 | if (desktopStarted) { |
| 666 | slog.debug("stopping desktop"); |
| 667 | desktopStarted = false; |
| 668 | desktop->stop(); |
| 669 | stopFrameClock(); |
| 670 | } |
| 671 | } |
| 672 | |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 673 | int VNCServerST::authClientCount() { |
| 674 | int count = 0; |
| 675 | std::list<VNCSConnectionST*>::iterator ci; |
| 676 | for (ci = clients.begin(); ci != clients.end(); ci++) { |
| 677 | if ((*ci)->authenticated()) |
| 678 | count++; |
| 679 | } |
| 680 | return count; |
| 681 | } |
| 682 | |
| 683 | inline bool VNCServerST::needRenderedCursor() |
| 684 | { |
| 685 | std::list<VNCSConnectionST*>::iterator ci; |
| 686 | for (ci = clients.begin(); ci != clients.end(); ci++) |
| 687 | if ((*ci)->needRenderedCursor()) return true; |
| 688 | return false; |
| 689 | } |
| 690 | |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 691 | void VNCServerST::startFrameClock() |
Pierre Ossman | bbf955e | 2011-11-08 12:44:10 +0000 | [diff] [blame] | 692 | { |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 693 | if (frameTimer.isStarted()) |
Pierre Ossman | bbf955e | 2011-11-08 12:44:10 +0000 | [diff] [blame] | 694 | return; |
Pierre Ossman | 559a2e8 | 2012-01-23 15:54:11 +0000 | [diff] [blame] | 695 | if (blockCounter > 0) |
| 696 | return; |
Pierre Ossman | b53c3bf | 2018-03-22 16:01:44 +0100 | [diff] [blame] | 697 | if (!desktopStarted) |
| 698 | return; |
Pierre Ossman | 559a2e8 | 2012-01-23 15:54:11 +0000 | [diff] [blame] | 699 | |
Pierre Ossman | 7be73d7 | 2017-11-06 13:16:35 +0100 | [diff] [blame] | 700 | // The first iteration will be just half a frame as we get a very |
| 701 | // unstable update rate if we happen to be perfectly in sync with |
| 702 | // the application's update rate |
| 703 | frameTimer.start(1000/rfb::Server::frameRate/2); |
Pierre Ossman | bbf955e | 2011-11-08 12:44:10 +0000 | [diff] [blame] | 704 | } |
| 705 | |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 706 | void VNCServerST::stopFrameClock() |
| 707 | { |
| 708 | frameTimer.stop(); |
| 709 | } |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 710 | |
Pierre Ossman | a2b80d6 | 2018-03-23 09:30:09 +0100 | [diff] [blame] | 711 | int VNCServerST::msToNextUpdate() |
| 712 | { |
| 713 | // FIXME: If the application is updating slower than frameRate then |
| 714 | // we could allow the clients more time here |
| 715 | |
| 716 | if (!frameTimer.isStarted()) |
| 717 | return 1000/rfb::Server::frameRate/2; |
| 718 | else |
| 719 | return frameTimer.getRemainingMs(); |
| 720 | } |
| 721 | |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 722 | // writeUpdate() is called on a regular interval in order to see what |
| 723 | // updates are pending and propagates them to the update tracker for |
| 724 | // each client. It uses the ComparingUpdateTracker's compare() method |
| 725 | // to filter out areas of the screen which haven't actually changed. It |
| 726 | // also checks the state of the (server-side) rendered cursor, if |
| 727 | // necessary rendering it again with the correct background. |
| 728 | |
| 729 | void VNCServerST::writeUpdate() |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 730 | { |
Constantin Kaplinsky | 604d781 | 2007-08-31 15:50:37 +0000 | [diff] [blame] | 731 | UpdateInfo ui; |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 732 | Region toCheck; |
| 733 | |
| 734 | std::list<VNCSConnectionST*>::iterator ci, ci_next; |
| 735 | |
| 736 | assert(blockCounter == 0); |
Pierre Ossman | b53c3bf | 2018-03-22 16:01:44 +0100 | [diff] [blame] | 737 | assert(desktopStarted); |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 738 | |
Constantin Kaplinsky | 604d781 | 2007-08-31 15:50:37 +0000 | [diff] [blame] | 739 | comparer->getUpdateInfo(&ui, pb->getRect()); |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 740 | toCheck = ui.changed.union_(ui.copied); |
Constantin Kaplinsky | 604d781 | 2007-08-31 15:50:37 +0000 | [diff] [blame] | 741 | |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 742 | if (needRenderedCursor()) { |
Pierre Ossman | 6a1a0d0 | 2017-02-19 15:48:17 +0100 | [diff] [blame] | 743 | Rect clippedCursorRect = Rect(0, 0, cursor->width(), cursor->height()) |
| 744 | .translate(cursorPos.subtract(cursor->hotspot())) |
| 745 | .intersect(pb->getRect()); |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 746 | |
Pierre Ossman | 24684e5 | 2016-12-05 16:58:19 +0100 | [diff] [blame] | 747 | if (!toCheck.intersect(clippedCursorRect).is_empty()) |
| 748 | renderedCursorInvalid = true; |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 749 | } |
| 750 | |
| 751 | pb->grabRegion(toCheck); |
| 752 | |
Pierre Ossman | b114cec | 2011-11-20 15:36:11 +0000 | [diff] [blame] | 753 | if (getComparerState()) |
| 754 | comparer->enable(); |
| 755 | else |
| 756 | comparer->disable(); |
| 757 | |
| 758 | if (comparer->compare()) |
Constantin Kaplinsky | f0b3be7 | 2008-08-21 05:22:04 +0000 | [diff] [blame] | 759 | comparer->getUpdateInfo(&ui, pb->getRect()); |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 760 | |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 761 | comparer->clear(); |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 762 | |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 763 | for (ci = clients.begin(); ci != clients.end(); ci = ci_next) { |
| 764 | ci_next = ci; ci_next++; |
Constantin Kaplinsky | 604d781 | 2007-08-31 15:50:37 +0000 | [diff] [blame] | 765 | (*ci)->add_copied(ui.copied, ui.copy_delta); |
| 766 | (*ci)->add_changed(ui.changed); |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 767 | (*ci)->writeFramebufferUpdateOrClose(); |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 768 | } |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 769 | } |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 770 | |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 771 | // checkUpdate() is called by clients to see if it is safe to read from |
| 772 | // the framebuffer at this time. |
| 773 | |
Pierre Ossman | 8efc7b4 | 2018-03-23 11:45:51 +0100 | [diff] [blame] | 774 | Region VNCServerST::getPendingRegion() |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 775 | { |
Pierre Ossman | 8efc7b4 | 2018-03-23 11:45:51 +0100 | [diff] [blame] | 776 | UpdateInfo ui; |
| 777 | |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 778 | // Block clients as the frame buffer cannot be safely accessed |
| 779 | if (blockCounter > 0) |
Pierre Ossman | 8efc7b4 | 2018-03-23 11:45:51 +0100 | [diff] [blame] | 780 | return pb->getRect(); |
Pierre Ossman | 6e49e95 | 2016-10-07 15:59:38 +0200 | [diff] [blame] | 781 | |
| 782 | // Block client from updating if there are pending updates |
Pierre Ossman | 8efc7b4 | 2018-03-23 11:45:51 +0100 | [diff] [blame] | 783 | if (comparer->is_empty()) |
| 784 | return Region(); |
Pierre Ossman | bbf955e | 2011-11-08 12:44:10 +0000 | [diff] [blame] | 785 | |
Pierre Ossman | 8efc7b4 | 2018-03-23 11:45:51 +0100 | [diff] [blame] | 786 | comparer->getUpdateInfo(&ui, pb->getRect()); |
| 787 | |
| 788 | return ui.changed.union_(ui.copied); |
Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame] | 789 | } |
| 790 | |
Pierre Ossman | 24684e5 | 2016-12-05 16:58:19 +0100 | [diff] [blame] | 791 | const RenderedCursor* VNCServerST::getRenderedCursor() |
| 792 | { |
| 793 | if (renderedCursorInvalid) { |
Pierre Ossman | 7cb4f31 | 2017-02-24 13:25:00 +0100 | [diff] [blame] | 794 | renderedCursor.update(pb, cursor, cursorPos); |
Pierre Ossman | 24684e5 | 2016-12-05 16:58:19 +0100 | [diff] [blame] | 795 | renderedCursorInvalid = false; |
| 796 | } |
| 797 | |
| 798 | return &renderedCursor; |
| 799 | } |
| 800 | |
Pierre Ossman | b114cec | 2011-11-20 15:36:11 +0000 | [diff] [blame] | 801 | bool VNCServerST::getComparerState() |
| 802 | { |
| 803 | if (rfb::Server::compareFB == 0) |
| 804 | return false; |
| 805 | if (rfb::Server::compareFB != 2) |
| 806 | return true; |
| 807 | |
| 808 | std::list<VNCSConnectionST*>::iterator ci, ci_next; |
| 809 | for (ci=clients.begin();ci!=clients.end();ci=ci_next) { |
| 810 | ci_next = ci; ci_next++; |
| 811 | if ((*ci)->getComparerState()) |
| 812 | return true; |
| 813 | } |
| 814 | return false; |
| 815 | } |