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-rw-r--r--libvncserver/rfbserver.c1808
1 files changed, 1808 insertions, 0 deletions
diff --git a/libvncserver/rfbserver.c b/libvncserver/rfbserver.c
new file mode 100644
index 0000000..e22283e
--- /dev/null
+++ b/libvncserver/rfbserver.c
@@ -0,0 +1,1808 @@
+/*
+ * rfbserver.c - deal with server-side of the RFB protocol.
+ */
+
+/*
+ * Copyright (C) 2002 RealVNC Ltd.
+ * OSXvnc Copyright (C) 2001 Dan McGuirk <mcguirk@incompleteness.net>.
+ * Original Xvnc code Copyright (C) 1999 AT&T Laboratories Cambridge.
+ * All Rights Reserved.
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+#include <string.h>
+#include <rfb/rfb.h>
+#include <rfb/rfbregion.h>
+
+#ifdef LIBVNCSERVER_HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+
+#ifdef WIN32
+#define write(sock,buf,len) send(sock,buf,len,0)
+#else
+#ifdef LIBVNCSERVER_HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <pwd.h>
+#ifdef LIBVNCSERVER_HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef LIBVNCSERVER_HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+#endif
+#endif
+
+#ifdef CORBA
+#include <vncserverctrl.h>
+#endif
+
+#ifdef DEBUGPROTO
+#undef DEBUGPROTO
+#define DEBUGPROTO(x) x
+#else
+#define DEBUGPROTO(x)
+#endif
+
+rfbClientPtr pointerClient = NULL; /* Mutex for pointer events */
+
+static void rfbProcessClientProtocolVersion(rfbClientPtr cl);
+static void rfbProcessClientNormalMessage(rfbClientPtr cl);
+static void rfbProcessClientInitMessage(rfbClientPtr cl);
+
+#ifdef LIBVNCSERVER_HAVE_LIBPTHREAD
+void rfbIncrClientRef(rfbClientPtr cl)
+{
+ LOCK(cl->refCountMutex);
+ cl->refCount++;
+ UNLOCK(cl->refCountMutex);
+}
+
+void rfbDecrClientRef(rfbClientPtr cl)
+{
+ LOCK(cl->refCountMutex);
+ cl->refCount--;
+ if(cl->refCount<=0) /* just to be sure also < 0 */
+ TSIGNAL(cl->deleteCond);
+ UNLOCK(cl->refCountMutex);
+}
+#else
+void rfbIncrClientRef(rfbClientPtr cl) {}
+void rfbDecrClientRef(rfbClientPtr cl) {}
+#endif
+
+#ifdef LIBVNCSERVER_HAVE_LIBPTHREAD
+MUTEX(rfbClientListMutex);
+#endif
+
+struct rfbClientIterator {
+ rfbClientPtr next;
+ rfbScreenInfoPtr screen;
+};
+
+void
+rfbClientListInit(rfbScreenInfoPtr rfbScreen)
+{
+ if(sizeof(rfbBool)!=1) {
+ /* a sanity check */
+ fprintf(stderr,"rfbBool's size is not 1 (%d)!\n",sizeof(rfbBool));
+ /* we cannot continue, because rfbBool is supposed to be char everywhere */
+ exit(1);
+ }
+ rfbScreen->rfbClientHead = NULL;
+ INIT_MUTEX(rfbClientListMutex);
+}
+
+rfbClientIteratorPtr
+rfbGetClientIterator(rfbScreenInfoPtr rfbScreen)
+{
+ rfbClientIteratorPtr i =
+ (rfbClientIteratorPtr)malloc(sizeof(struct rfbClientIterator));
+ i->next = 0;
+ i->screen = rfbScreen;
+ return i;
+}
+
+rfbClientPtr
+rfbClientIteratorHead(rfbClientIteratorPtr i)
+{
+#ifdef LIBVNCSERVER_HAVE_LIBPTHREAD
+ if(i->next != 0) {
+ rfbDecrClientRef(i->next);
+ rfbIncrClientRef(i->screen->rfbClientHead);
+ }
+#endif
+ LOCK(rfbClientListMutex);
+ i->next = i->screen->rfbClientHead;
+ UNLOCK(rfbClientListMutex);
+ return i->next;
+}
+
+rfbClientPtr
+rfbClientIteratorNext(rfbClientIteratorPtr i)
+{
+ if(i->next == 0) {
+ LOCK(rfbClientListMutex);
+ i->next = i->screen->rfbClientHead;
+ UNLOCK(rfbClientListMutex);
+ } else {
+ IF_PTHREADS(rfbClientPtr cl = i->next);
+ i->next = i->next->next;
+ IF_PTHREADS(rfbDecrClientRef(cl));
+ }
+
+#ifdef LIBVNCSERVER_HAVE_LIBPTHREAD
+ while(i->next && i->next->sock<0)
+ i->next = i->next->next;
+ if(i->next)
+ rfbIncrClientRef(i->next);
+#endif
+
+ return i->next;
+}
+
+void
+rfbReleaseClientIterator(rfbClientIteratorPtr iterator)
+{
+ IF_PTHREADS(if(iterator->next) rfbDecrClientRef(iterator->next));
+ free(iterator);
+}
+
+
+/*
+ * rfbNewClientConnection is called from sockets.c when a new connection
+ * comes in.
+ */
+
+void
+rfbNewClientConnection(rfbScreen,sock)
+ rfbScreenInfoPtr rfbScreen;
+ int sock;
+{
+ rfbClientPtr cl;
+
+ cl = rfbNewClient(rfbScreen,sock);
+#ifdef CORBA
+ if(cl!=NULL)
+ newConnection(cl, (KEYBOARD_DEVICE|POINTER_DEVICE),1,1,1);
+#endif
+}
+
+
+/*
+ * rfbReverseConnection is called by the CORBA stuff to make an outward
+ * connection to a "listening" RFB client.
+ */
+
+rfbClientPtr
+rfbReverseConnection(rfbScreen,host, port)
+ rfbScreenInfoPtr rfbScreen;
+ char *host;
+ int port;
+{
+ int sock;
+ rfbClientPtr cl;
+
+ if ((sock = rfbConnect(rfbScreen, host, port)) < 0)
+ return (rfbClientPtr)NULL;
+
+ cl = rfbNewClient(rfbScreen, sock);
+
+ if (cl) {
+ cl->reverseConnection = TRUE;
+ }
+
+ return cl;
+}
+
+
+/*
+ * rfbNewClient is called when a new connection has been made by whatever
+ * means.
+ */
+
+rfbClientPtr
+rfbNewTCPOrUDPClient(rfbScreen,sock,isUDP)
+ rfbScreenInfoPtr rfbScreen;
+ int sock;
+ rfbBool isUDP;
+{
+ rfbProtocolVersionMsg pv;
+ rfbClientIteratorPtr iterator;
+ rfbClientPtr cl,cl_;
+ struct sockaddr_in addr;
+ size_t addrlen = sizeof(struct sockaddr_in);
+
+ cl = (rfbClientPtr)calloc(sizeof(rfbClientRec),1);
+
+ cl->screen = rfbScreen;
+ cl->sock = sock;
+ cl->viewOnly = FALSE;
+
+ rfbResetStats(cl);
+
+ if(isUDP) {
+ rfbLog(" accepted UDP client\n");
+ } else {
+ int one=1;
+
+ getpeername(sock, (struct sockaddr *)&addr, &addrlen);
+ cl->host = strdup(inet_ntoa(addr.sin_addr));
+
+ rfbLog(" other clients:\n");
+ iterator = rfbGetClientIterator(rfbScreen);
+ while ((cl_ = rfbClientIteratorNext(iterator)) != NULL) {
+ rfbLog(" %s\n",cl_->host);
+ }
+ rfbReleaseClientIterator(iterator);
+
+#ifndef WIN32
+ if (fcntl(sock, F_SETFL, O_NONBLOCK) < 0) {
+ rfbLogPerror("fcntl failed");
+ close(sock);
+ return NULL;
+ }
+#endif
+
+ if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
+ (char *)&one, sizeof(one)) < 0) {
+ rfbLogPerror("setsockopt failed");
+ close(sock);
+ return NULL;
+ }
+
+ FD_SET(sock,&(rfbScreen->allFds));
+ rfbScreen->maxFd = max(sock,rfbScreen->maxFd);
+
+ INIT_MUTEX(cl->outputMutex);
+ INIT_MUTEX(cl->refCountMutex);
+ INIT_COND(cl->deleteCond);
+
+ cl->state = RFB_PROTOCOL_VERSION;
+
+ cl->reverseConnection = FALSE;
+ cl->readyForSetColourMapEntries = FALSE;
+ cl->useCopyRect = FALSE;
+ cl->preferredEncoding = rfbEncodingRaw;
+ cl->correMaxWidth = 48;
+ cl->correMaxHeight = 48;
+#ifdef LIBVNCSERVER_HAVE_LIBZ
+ cl->zrleData = 0;
+#endif
+
+ cl->copyRegion = sraRgnCreate();
+ cl->copyDX = 0;
+ cl->copyDY = 0;
+
+ cl->modifiedRegion =
+ sraRgnCreateRect(0,0,rfbScreen->width,rfbScreen->height);
+
+ INIT_MUTEX(cl->updateMutex);
+ INIT_COND(cl->updateCond);
+
+ cl->requestedRegion = sraRgnCreate();
+
+ cl->format = cl->screen->rfbServerFormat;
+ cl->translateFn = rfbTranslateNone;
+ cl->translateLookupTable = NULL;
+
+ LOCK(rfbClientListMutex);
+
+ IF_PTHREADS(cl->refCount = 0);
+ cl->next = rfbScreen->rfbClientHead;
+ cl->prev = NULL;
+ if (rfbScreen->rfbClientHead)
+ rfbScreen->rfbClientHead->prev = cl;
+
+ rfbScreen->rfbClientHead = cl;
+ UNLOCK(rfbClientListMutex);
+
+#ifdef LIBVNCSERVER_HAVE_LIBJPEG
+ cl->tightCompressLevel = TIGHT_DEFAULT_COMPRESSION;
+ cl->tightQualityLevel = -1;
+ {
+ int i;
+ for (i = 0; i < 4; i++)
+ cl->zsActive[i] = FALSE;
+ }
+#endif
+
+ cl->enableCursorShapeUpdates = FALSE;
+ cl->enableCursorPosUpdates = FALSE;
+ cl->useRichCursorEncoding = FALSE;
+ cl->enableLastRectEncoding = FALSE;
+ cl->useNewFBSize = FALSE;
+
+#ifdef LIBVNCSERVER_HAVE_LIBZ
+ cl->compStreamInited = FALSE;
+ cl->compStream.total_in = 0;
+ cl->compStream.total_out = 0;
+ cl->compStream.zalloc = Z_NULL;
+ cl->compStream.zfree = Z_NULL;
+ cl->compStream.opaque = Z_NULL;
+
+ cl->zlibCompressLevel = 5;
+#endif
+
+ cl->progressiveSliceY = 0;
+
+ sprintf(pv,rfbProtocolVersionFormat,rfbProtocolMajorVersion,
+ rfbProtocolMinorVersion);
+
+ if (WriteExact(cl, pv, sz_rfbProtocolVersionMsg) < 0) {
+ rfbLogPerror("rfbNewClient: write");
+ rfbCloseClient(cl);
+ /* TODO: memory leak here (cl is never freed)
+ * can rfbClientConnectionGone called at this time?
+ * tim@tjansen.de
+ */
+ return NULL;
+ }
+ }
+
+ cl->clientData = NULL;
+ cl->clientGoneHook = doNothingWithClient;
+ switch (cl->screen->newClientHook(cl)) {
+ case RFB_CLIENT_ON_HOLD:
+ cl->onHold = TRUE;
+ break;
+ case RFB_CLIENT_ACCEPT:
+ cl->onHold = FALSE;
+ break;
+ case RFB_CLIENT_REFUSE:
+ rfbCloseClient(cl);
+ rfbClientConnectionGone(cl);
+ cl = NULL;
+ break;
+ }
+ return cl;
+}
+
+rfbClientPtr
+rfbNewClient(rfbScreen,sock)
+ rfbScreenInfoPtr rfbScreen;
+ int sock;
+{
+ return(rfbNewTCPOrUDPClient(rfbScreen,sock,FALSE));
+}
+
+rfbClientPtr
+rfbNewUDPClient(rfbScreen)
+ rfbScreenInfoPtr rfbScreen;
+{
+ return((rfbScreen->udpClient=
+ rfbNewTCPOrUDPClient(rfbScreen,rfbScreen->udpSock,TRUE)));
+}
+
+/*
+ * rfbClientConnectionGone is called from sockets.c just after a connection
+ * has gone away.
+ */
+
+void
+rfbClientConnectionGone(cl)
+ rfbClientPtr cl;
+{
+ int i;
+
+ LOCK(rfbClientListMutex);
+
+ if (cl->prev)
+ cl->prev->next = cl->next;
+ else
+ cl->screen->rfbClientHead = cl->next;
+ if (cl->next)
+ cl->next->prev = cl->prev;
+
+#ifdef LIBVNCSERVER_HAVE_LIBZ
+ FreeZrleData(cl);
+#endif
+
+#ifdef LIBVNCSERVER_HAVE_LIBPTHREAD
+ if(cl->screen->backgroundLoop != FALSE)
+ do {
+ LOCK(cl->refCountMutex);
+ i=cl->refCount;
+ UNLOCK(cl->refCountMutex);
+ if(i>0)
+ WAIT(cl->deleteCond,cl->refCountMutex);
+ } while(i>0);
+#endif
+
+ if(cl->sock>=0)
+ FD_CLR(cl->sock,&(cl->screen->allFds));
+
+ cl->clientGoneHook(cl);
+
+ rfbLog("Client %s gone\n",cl->host);
+ free(cl->host);
+
+#ifdef LIBVNCSERVER_HAVE_LIBZ
+ /* Release the compression state structures if any. */
+ if ( cl->compStreamInited ) {
+ deflateEnd( &(cl->compStream) );
+ }
+
+#ifdef LIBVNCSERVER_HAVE_LIBJPEG
+ for (i = 0; i < 4; i++) {
+ if (cl->zsActive[i])
+ deflateEnd(&cl->zsStruct[i]);
+ }
+#endif
+#endif
+
+ if (pointerClient == cl)
+ pointerClient = NULL;
+
+ sraRgnDestroy(cl->modifiedRegion);
+ sraRgnDestroy(cl->requestedRegion);
+ sraRgnDestroy(cl->copyRegion);
+
+ UNLOCK(rfbClientListMutex);
+
+ if (cl->translateLookupTable) free(cl->translateLookupTable);
+
+ TINI_COND(cl->updateCond);
+ TINI_MUTEX(cl->updateMutex);
+
+ LOCK(cl->outputMutex);
+ TINI_MUTEX(cl->outputMutex);
+
+#ifdef CORBA
+ destroyConnection(cl);
+#endif
+
+ rfbPrintStats(cl);
+
+ free(cl);
+}
+
+
+/*
+ * rfbProcessClientMessage is called when there is data to read from a client.
+ */
+
+void
+rfbProcessClientMessage(cl)
+ rfbClientPtr cl;
+{
+ switch (cl->state) {
+ case RFB_PROTOCOL_VERSION:
+ rfbProcessClientProtocolVersion(cl);
+ return;
+ case RFB_AUTHENTICATION:
+ rfbAuthProcessClientMessage(cl);
+ return;
+ case RFB_INITIALISATION:
+ rfbProcessClientInitMessage(cl);
+ return;
+ default:
+ rfbProcessClientNormalMessage(cl);
+ return;
+ }
+}
+
+
+/*
+ * rfbProcessClientProtocolVersion is called when the client sends its
+ * protocol version.
+ */
+
+static void
+rfbProcessClientProtocolVersion(cl)
+ rfbClientPtr cl;
+{
+ rfbProtocolVersionMsg pv;
+ int n, major_, minor_;
+ char failureReason[256];
+
+ if ((n = ReadExact(cl, pv, sz_rfbProtocolVersionMsg)) <= 0) {
+ if (n == 0)
+ rfbLog("rfbProcessClientProtocolVersion: client gone\n");
+ else
+ rfbLogPerror("rfbProcessClientProtocolVersion: read");
+ rfbCloseClient(cl);
+ return;
+ }
+
+ pv[sz_rfbProtocolVersionMsg] = 0;
+ if (sscanf(pv,rfbProtocolVersionFormat,&major_,&minor_) != 2) {
+ char name[1024];
+ if(sscanf(pv,"RFB %03d.%03d %1024s\n",&major_,&minor_,name) != 3) {
+ rfbErr("rfbProcessClientProtocolVersion: not a valid RFB client\n");
+ rfbCloseClient(cl);
+ return;
+ }
+ free(cl->host);
+ cl->host=strdup(name);
+ }
+ rfbLog("Protocol version %d.%d\n", major_, minor_);
+
+ if (major_ != rfbProtocolMajorVersion) {
+ /* Major version mismatch - send a ConnFailed message */
+
+ rfbErr("Major version mismatch\n");
+ sprintf(failureReason,
+ "RFB protocol version mismatch - server %d.%d, client %d.%d",
+ rfbProtocolMajorVersion,rfbProtocolMinorVersion,major_,minor_);
+ rfbClientConnFailed(cl, failureReason);
+ return;
+ }
+
+ if (minor_ != rfbProtocolMinorVersion) {
+ /* Minor version mismatch - warn but try to continue */
+ rfbLog("Ignoring minor version mismatch\n");
+ }
+
+ rfbAuthNewClient(cl);
+}
+
+
+/*
+ * rfbClientConnFailed is called when a client connection has failed either
+ * because it talks the wrong protocol or it has failed authentication.
+ */
+
+void
+rfbClientConnFailed(cl, reason)
+ rfbClientPtr cl;
+ char *reason;
+{
+ char *buf;
+ int len = strlen(reason);
+
+ buf = (char *)malloc(8 + len);
+ ((uint32_t *)buf)[0] = Swap32IfLE(rfbConnFailed);
+ ((uint32_t *)buf)[1] = Swap32IfLE(len);
+ memcpy(buf + 8, reason, len);
+
+ if (WriteExact(cl, buf, 8 + len) < 0)
+ rfbLogPerror("rfbClientConnFailed: write");
+ free(buf);
+ rfbCloseClient(cl);
+}
+
+
+/*
+ * rfbProcessClientInitMessage is called when the client sends its
+ * initialisation message.
+ */
+
+static void
+rfbProcessClientInitMessage(cl)
+ rfbClientPtr cl;
+{
+ rfbClientInitMsg ci;
+ char buf[256];
+ rfbServerInitMsg *si = (rfbServerInitMsg *)buf;
+ int len, n;
+ rfbClientIteratorPtr iterator;
+ rfbClientPtr otherCl;
+
+ if ((n = ReadExact(cl, (char *)&ci,sz_rfbClientInitMsg)) <= 0) {
+ if (n == 0)
+ rfbLog("rfbProcessClientInitMessage: client gone\n");
+ else
+ rfbLogPerror("rfbProcessClientInitMessage: read");
+ rfbCloseClient(cl);
+ return;
+ }
+
+ si->framebufferWidth = Swap16IfLE(cl->screen->width);
+ si->framebufferHeight = Swap16IfLE(cl->screen->height);
+ si->format = cl->screen->rfbServerFormat;
+ si->format.redMax = Swap16IfLE(si->format.redMax);
+ si->format.greenMax = Swap16IfLE(si->format.greenMax);
+ si->format.blueMax = Swap16IfLE(si->format.blueMax);
+
+ if (strlen(cl->screen->desktopName) > 128) /* sanity check on desktop name len */
+ ((char*)cl->screen->desktopName)[128] = 0;
+
+ strcpy(buf + sz_rfbServerInitMsg, cl->screen->desktopName);
+ len = strlen(buf + sz_rfbServerInitMsg);
+ si->nameLength = Swap32IfLE(len);
+
+ if (WriteExact(cl, buf, sz_rfbServerInitMsg + len) < 0) {
+ rfbLogPerror("rfbProcessClientInitMessage: write");
+ rfbCloseClient(cl);
+ return;
+ }
+
+ cl->state = RFB_NORMAL;
+
+ if (!cl->reverseConnection &&
+ (cl->screen->rfbNeverShared || (!cl->screen->rfbAlwaysShared && !ci.shared))) {
+
+ if (cl->screen->rfbDontDisconnect) {
+ iterator = rfbGetClientIterator(cl->screen);
+ while ((otherCl = rfbClientIteratorNext(iterator)) != NULL) {
+ if ((otherCl != cl) && (otherCl->state == RFB_NORMAL)) {
+ rfbLog("-dontdisconnect: Not shared & existing client\n");
+ rfbLog(" refusing new client %s\n", cl->host);
+ rfbCloseClient(cl);
+ rfbReleaseClientIterator(iterator);
+ return;
+ }
+ }
+ rfbReleaseClientIterator(iterator);
+ } else {
+ iterator = rfbGetClientIterator(cl->screen);
+ while ((otherCl = rfbClientIteratorNext(iterator)) != NULL) {
+ if ((otherCl != cl) && (otherCl->state == RFB_NORMAL)) {
+ rfbLog("Not shared - closing connection to client %s\n",
+ otherCl->host);
+ rfbCloseClient(otherCl);
+ }
+ }
+ rfbReleaseClientIterator(iterator);
+ }
+ }
+}
+
+static rfbBool rectSwapIfLEAndClip(uint16_t* x,uint16_t* y,uint16_t* w,uint16_t* h,
+ rfbScreenInfoPtr screen)
+{
+ *x=Swap16IfLE(*x);
+ *y=Swap16IfLE(*y);
+ *w=Swap16IfLE(*w);
+ *h=Swap16IfLE(*h);
+ if(*w>screen->width-*x)
+ *w=screen->width-*x;
+ /* possible underflow */
+ if(*w>screen->width-*x)
+ return FALSE;
+ if(*h>screen->height-*y)
+ *h=screen->height-*y;
+ if(*h>screen->height-*y)
+ return FALSE;
+
+ return TRUE;
+}
+
+/*
+ * rfbProcessClientNormalMessage is called when the client has sent a normal
+ * protocol message.
+ */
+
+static void
+rfbProcessClientNormalMessage(cl)
+ rfbClientPtr cl;
+{
+ int n=0;
+ rfbClientToServerMsg msg;
+ char *str;
+
+ if ((n = ReadExact(cl, (char *)&msg, 1)) <= 0) {
+ if (n != 0)
+ rfbLogPerror("rfbProcessClientNormalMessage: read");
+ rfbCloseClient(cl);
+ return;
+ }
+
+ switch (msg.type) {
+
+ case rfbSetPixelFormat:
+
+ if ((n = ReadExact(cl, ((char *)&msg) + 1,
+ sz_rfbSetPixelFormatMsg - 1)) <= 0) {
+ if (n != 0)
+ rfbLogPerror("rfbProcessClientNormalMessage: read");
+ rfbCloseClient(cl);
+ return;
+ }
+
+ cl->format.bitsPerPixel = msg.spf.format.bitsPerPixel;
+ cl->format.depth = msg.spf.format.depth;
+ cl->format.bigEndian = (msg.spf.format.bigEndian ? TRUE : FALSE);
+ cl->format.trueColour = (msg.spf.format.trueColour ? TRUE : FALSE);
+ cl->format.redMax = Swap16IfLE(msg.spf.format.redMax);
+ cl->format.greenMax = Swap16IfLE(msg.spf.format.greenMax);
+ cl->format.blueMax = Swap16IfLE(msg.spf.format.blueMax);
+ cl->format.redShift = msg.spf.format.redShift;
+ cl->format.greenShift = msg.spf.format.greenShift;
+ cl->format.blueShift = msg.spf.format.blueShift;
+
+ cl->readyForSetColourMapEntries = TRUE;
+ cl->screen->setTranslateFunction(cl);
+
+ return;
+
+
+ case rfbFixColourMapEntries:
+ if ((n = ReadExact(cl, ((char *)&msg) + 1,
+ sz_rfbFixColourMapEntriesMsg - 1)) <= 0) {
+ if (n != 0)
+ rfbLogPerror("rfbProcessClientNormalMessage: read");
+ rfbCloseClient(cl);
+ return;
+ }
+ rfbLog("rfbProcessClientNormalMessage: %s",
+ "FixColourMapEntries unsupported\n");
+ rfbCloseClient(cl);
+ return;
+
+
+ case rfbSetEncodings:
+ {
+ int i;
+ uint32_t enc;
+
+ if ((n = ReadExact(cl, ((char *)&msg) + 1,
+ sz_rfbSetEncodingsMsg - 1)) <= 0) {
+ if (n != 0)
+ rfbLogPerror("rfbProcessClientNormalMessage: read");
+ rfbCloseClient(cl);
+ return;
+ }
+
+ msg.se.nEncodings = Swap16IfLE(msg.se.nEncodings);
+
+ cl->preferredEncoding = -1;
+ cl->useCopyRect = FALSE;
+ cl->enableCursorShapeUpdates = FALSE;
+ cl->enableCursorPosUpdates = FALSE;
+ cl->enableLastRectEncoding = FALSE;
+ cl->useNewFBSize = FALSE;
+
+ for (i = 0; i < msg.se.nEncodings; i++) {
+ if ((n = ReadExact(cl, (char *)&enc, 4)) <= 0) {
+ if (n != 0)
+ rfbLogPerror("rfbProcessClientNormalMessage: read");
+ rfbCloseClient(cl);
+ return;
+ }
+ enc = Swap32IfLE(enc);
+
+ switch (enc) {
+
+ case rfbEncodingCopyRect:
+ cl->useCopyRect = TRUE;
+ break;
+ case rfbEncodingRaw:
+ if (cl->preferredEncoding == -1) {
+ cl->preferredEncoding = enc;
+ rfbLog("Using raw encoding for client %s\n",
+ cl->host);
+ }
+ break;
+ case rfbEncodingRRE:
+ if (cl->preferredEncoding == -1) {
+ cl->preferredEncoding = enc;
+ rfbLog("Using rre encoding for client %s\n",
+ cl->host);
+ }
+ break;
+ case rfbEncodingCoRRE:
+ if (cl->preferredEncoding == -1) {
+ cl->preferredEncoding = enc;
+ rfbLog("Using CoRRE encoding for client %s\n",
+ cl->host);
+ }
+ break;
+ case rfbEncodingHextile:
+ if (cl->preferredEncoding == -1) {
+ cl->preferredEncoding = enc;
+ rfbLog("Using hextile encoding for client %s\n",
+ cl->host);
+ }
+ break;
+#ifdef LIBVNCSERVER_HAVE_LIBZ
+ case rfbEncodingZlib:
+ if (cl->preferredEncoding == -1) {
+ cl->preferredEncoding = enc;
+ rfbLog("Using zlib encoding for client %s\n",
+ cl->host);
+ }
+ break;
+#ifdef LIBVNCSERVER_HAVE_LIBJPEG
+ case rfbEncodingTight:
+ if (cl->preferredEncoding == -1) {
+ cl->preferredEncoding = enc;
+ rfbLog("Using tight encoding for client %s\n",
+ cl->host);
+ }
+ break;
+#endif
+#endif
+ case rfbEncodingXCursor:
+ if(!cl->screen->dontConvertRichCursorToXCursor) {
+ rfbLog("Enabling X-style cursor updates for client %s\n",
+ cl->host);
+ cl->enableCursorShapeUpdates = TRUE;
+ cl->cursorWasChanged = TRUE;
+ }
+ break;
+ case rfbEncodingRichCursor:
+ rfbLog("Enabling full-color cursor updates for client %s\n",
+ cl->host);
+ cl->enableCursorShapeUpdates = TRUE;
+ cl->useRichCursorEncoding = TRUE;
+ cl->cursorWasChanged = TRUE;
+ break;
+ case rfbEncodingPointerPos:
+ if (!cl->enableCursorPosUpdates) {
+ rfbLog("Enabling cursor position updates for client %s\n",
+ cl->host);
+ cl->enableCursorPosUpdates = TRUE;
+ cl->cursorWasMoved = TRUE;
+ }
+ break;
+ case rfbEncodingLastRect:
+ if (!cl->enableLastRectEncoding) {
+ rfbLog("Enabling LastRect protocol extension for client "
+ "%s\n", cl->host);
+ cl->enableLastRectEncoding = TRUE;
+ }
+ break;
+ case rfbEncodingNewFBSize:
+ if (!cl->useNewFBSize) {
+ rfbLog("Enabling NewFBSize protocol extension for client "
+ "%s\n", cl->host);
+ cl->useNewFBSize = TRUE;
+ }
+ break;
+#ifdef LIBVNCSERVER_BACKCHANNEL
+ case rfbEncodingBackChannel:
+ if (!cl->enableBackChannel) {
+ rfbLog("Enabling BackChannel protocol extension for "
+ "client %s\n", cl->host);
+ cl->enableBackChannel = TRUE;
+ }
+ break;
+#endif
+#ifdef LIBVNCSERVER_HAVE_LIBZ
+ case rfbEncodingZRLE:
+ if (cl->preferredEncoding == -1) {
+ cl->preferredEncoding = enc;
+ rfbLog("Using ZRLE encoding for client %s\n",
+ cl->host);
+ }
+ break;
+#endif
+ default:
+#ifdef LIBVNCSERVER_HAVE_LIBZ
+ if ( enc >= (uint32_t)rfbEncodingCompressLevel0 &&
+ enc <= (uint32_t)rfbEncodingCompressLevel9 ) {
+ cl->zlibCompressLevel = enc & 0x0F;
+#ifdef LIBVNCSERVER_HAVE_LIBJPEG
+ cl->tightCompressLevel = enc & 0x0F;
+ rfbLog("Using compression level %d for client %s\n",
+ cl->tightCompressLevel, cl->host);
+ } else if ( enc >= (uint32_t)rfbEncodingQualityLevel0 &&
+ enc <= (uint32_t)rfbEncodingQualityLevel9 ) {
+ cl->tightQualityLevel = enc & 0x0F;
+ rfbLog("Using image quality level %d for client %s\n",
+ cl->tightQualityLevel, cl->host);
+#endif
+ } else
+#endif
+ rfbLog("rfbProcessClientNormalMessage: ignoring unknown "
+ "encoding type %d\n", (int)enc);
+ }
+ }
+
+ if (cl->preferredEncoding == -1) {
+ cl->preferredEncoding = rfbEncodingRaw;
+ }
+
+ if (cl->enableCursorPosUpdates && !cl->enableCursorShapeUpdates) {
+ rfbLog("Disabling cursor position updates for client %s\n",
+ cl->host);
+ cl->enableCursorPosUpdates = FALSE;
+ }
+
+ return;
+ }
+
+
+ case rfbFramebufferUpdateRequest:
+ {
+ sraRegionPtr tmpRegion;
+
+ if ((n = ReadExact(cl, ((char *)&msg) + 1,
+ sz_rfbFramebufferUpdateRequestMsg-1)) <= 0) {
+ if (n != 0)
+ rfbLogPerror("rfbProcessClientNormalMessage: read");
+ rfbCloseClient(cl);
+ return;
+ }
+
+ if(!rectSwapIfLEAndClip(&msg.fur.x,&msg.fur.y,&msg.fur.w,&msg.fur.h,
+ cl->screen))
+ return;
+
+ tmpRegion =
+ sraRgnCreateRect(msg.fur.x,
+ msg.fur.y,
+ msg.fur.x+msg.fur.w,
+ msg.fur.y+msg.fur.h);
+
+ LOCK(cl->updateMutex);
+ sraRgnOr(cl->requestedRegion,tmpRegion);
+
+ if (!cl->readyForSetColourMapEntries) {
+ /* client hasn't sent a SetPixelFormat so is using server's */
+ cl->readyForSetColourMapEntries = TRUE;
+ if (!cl->format.trueColour) {
+ if (!rfbSetClientColourMap(cl, 0, 0)) {
+ sraRgnDestroy(tmpRegion);
+ UNLOCK(cl->updateMutex);
+ return;
+ }
+ }
+ }
+
+ if (!msg.fur.incremental) {
+ sraRgnOr(cl->modifiedRegion,tmpRegion);
+ sraRgnSubtract(cl->copyRegion,tmpRegion);
+ }
+ TSIGNAL(cl->updateCond);
+ UNLOCK(cl->updateMutex);
+
+ sraRgnDestroy(tmpRegion);
+
+ return;
+ }
+
+ case rfbKeyEvent:
+
+ cl->rfbKeyEventsRcvd++;
+
+ if ((n = ReadExact(cl, ((char *)&msg) + 1,
+ sz_rfbKeyEventMsg - 1)) <= 0) {
+ if (n != 0)
+ rfbLogPerror("rfbProcessClientNormalMessage: read");
+ rfbCloseClient(cl);
+ return;
+ }
+
+ if(!cl->viewOnly) {
+ cl->screen->kbdAddEvent(msg.ke.down, (rfbKeySym)Swap32IfLE(msg.ke.key), cl);
+ }
+
+ return;
+
+
+ case rfbPointerEvent:
+
+ cl->rfbPointerEventsRcvd++;
+
+ if ((n = ReadExact(cl, ((char *)&msg) + 1,
+ sz_rfbPointerEventMsg - 1)) <= 0) {
+ if (n != 0)
+ rfbLogPerror("rfbProcessClientNormalMessage: read");
+ rfbCloseClient(cl);
+ return;
+ }
+
+ if (pointerClient && (pointerClient != cl))
+ return;
+
+ if (msg.pe.buttonMask == 0)
+ pointerClient = NULL;
+ else
+ pointerClient = cl;
+
+ if(!cl->viewOnly) {
+ cl->screen->ptrAddEvent(msg.pe.buttonMask,
+ Swap16IfLE(msg.pe.x), Swap16IfLE(msg.pe.y), cl);
+ }
+
+ return;
+
+
+ case rfbClientCutText:
+
+ if ((n = ReadExact(cl, ((char *)&msg) + 1,
+ sz_rfbClientCutTextMsg - 1)) <= 0) {
+ if (n != 0)
+ rfbLogPerror("rfbProcessClientNormalMessage: read");
+ rfbCloseClient(cl);
+ return;
+ }
+
+ if(!cl->viewOnly) {
+ msg.cct.length = Swap32IfLE(msg.cct.length);
+
+ str = (char *)malloc(msg.cct.length);
+
+ if ((n = ReadExact(cl, str, msg.cct.length)) <= 0) {
+ if (n != 0)
+ rfbLogPerror("rfbProcessClientNormalMessage: read");
+ free(str);
+ rfbCloseClient(cl);
+ return;
+ }
+
+ cl->screen->setXCutText(str, msg.cct.length, cl);
+ free(str);
+ }
+
+ return;
+
+
+ default:
+
+ rfbLog("rfbProcessClientNormalMessage: unknown message type %d\n",
+ msg.type);
+ rfbLog(" ... closing connection\n");
+ rfbCloseClient(cl);
+ return;
+ }
+}
+
+
+
+/*
+ * rfbSendFramebufferUpdate - send the currently pending framebuffer update to
+ * the RFB client.
+ * givenUpdateRegion is not changed.
+ */
+
+rfbBool
+rfbSendFramebufferUpdate(cl, givenUpdateRegion)
+ rfbClientPtr cl;
+ sraRegionPtr givenUpdateRegion;
+{
+ sraRectangleIterator* i;
+ sraRect rect;
+ int nUpdateRegionRects;
+ rfbFramebufferUpdateMsg *fu = (rfbFramebufferUpdateMsg *)cl->updateBuf;
+ sraRegionPtr updateRegion,updateCopyRegion,tmpRegion;
+ int dx, dy;
+ rfbBool sendCursorShape = FALSE;
+ rfbBool sendCursorPos = FALSE;
+
+ if(cl->screen->displayHook)
+ cl->screen->displayHook(cl);
+
+ /*
+ * If framebuffer size was changed and the client supports NewFBSize
+ * encoding, just send NewFBSize marker and return.
+ */
+
+ if (cl->useNewFBSize && cl->newFBSizePending) {
+ LOCK(cl->updateMutex);
+ cl->newFBSizePending = FALSE;
+ UNLOCK(cl->updateMutex);
+ cl->rfbFramebufferUpdateMessagesSent++;
+ fu->type = rfbFramebufferUpdate;
+ fu->nRects = Swap16IfLE(1);
+ cl->ublen = sz_rfbFramebufferUpdateMsg;
+ if (!rfbSendNewFBSize(cl, cl->screen->width, cl->screen->height)) {
+ return FALSE;
+ }
+ return rfbSendUpdateBuf(cl);
+ }
+
+ /*
+ * If this client understands cursor shape updates, cursor should be
+ * removed from the framebuffer. Otherwise, make sure it's put up.
+ */
+
+ if (cl->enableCursorShapeUpdates) {
+ if (cl->screen->cursorIsDrawn) {
+ rfbUndrawCursor(cl->screen);
+ }
+ if (!cl->screen->cursorIsDrawn && cl->cursorWasChanged &&
+ cl->readyForSetColourMapEntries)
+ sendCursorShape = TRUE;
+ } else {
+ if (!cl->screen->cursorIsDrawn) {
+ rfbDrawCursor(cl->screen);
+ }
+ }
+
+ /*
+ * Do we plan to send cursor position update?
+ */
+
+ if (cl->enableCursorPosUpdates && cl->cursorWasMoved)
+ sendCursorPos = TRUE;
+
+ LOCK(cl->updateMutex);
+
+ /*
+ * The modifiedRegion may overlap the destination copyRegion. We remove
+ * any overlapping bits from the copyRegion (since they'd only be
+ * overwritten anyway).
+ */
+
+ sraRgnSubtract(cl->copyRegion,cl->modifiedRegion);
+
+ /*
+ * The client is interested in the region requestedRegion. The region
+ * which should be updated now is the intersection of requestedRegion
+ * and the union of modifiedRegion and copyRegion. If it's empty then
+ * no update is needed.
+ */
+
+ updateRegion = sraRgnCreateRgn(givenUpdateRegion);
+ if(cl->screen->progressiveSliceHeight>0) {
+ int height=cl->screen->progressiveSliceHeight,
+ y=cl->progressiveSliceY;
+ sraRegionPtr bbox=sraRgnBBox(updateRegion);
+ sraRect rect;
+ if(sraRgnPopRect(bbox,&rect,0)) {
+ sraRegionPtr slice;
+ if(y<rect.y1 || y>=rect.y2)
+ y=rect.y1;
+ slice=sraRgnCreateRect(0,y,cl->screen->width,y+height);
+ sraRgnAnd(updateRegion,slice);
+ sraRgnDestroy(slice);
+ }
+ sraRgnDestroy(bbox);
+ y+=height;
+ if(y>=cl->screen->height)
+ y=0;
+ cl->progressiveSliceY=y;
+ }
+
+ sraRgnOr(updateRegion,cl->copyRegion);
+ if(!sraRgnAnd(updateRegion,cl->requestedRegion) &&
+ !sendCursorShape && !sendCursorPos) {
+ sraRgnDestroy(updateRegion);
+ UNLOCK(cl->updateMutex);
+ return TRUE;
+ }
+
+ /*
+ * We assume that the client doesn't have any pixel data outside the
+ * requestedRegion. In other words, both the source and destination of a
+ * copy must lie within requestedRegion. So the region we can send as a
+ * copy is the intersection of the copyRegion with both the requestedRegion
+ * and the requestedRegion translated by the amount of the copy. We set
+ * updateCopyRegion to this.
+ */
+
+ updateCopyRegion = sraRgnCreateRgn(cl->copyRegion);
+ sraRgnAnd(updateCopyRegion,cl->requestedRegion);
+ tmpRegion = sraRgnCreateRgn(cl->requestedRegion);
+ sraRgnOffset(tmpRegion,cl->copyDX,cl->copyDY);
+ sraRgnAnd(updateCopyRegion,tmpRegion);
+ sraRgnDestroy(tmpRegion);
+ dx = cl->copyDX;
+ dy = cl->copyDY;
+
+ /*
+ * Next we remove updateCopyRegion from updateRegion so that updateRegion
+ * is the part of this update which is sent as ordinary pixel data (i.e not
+ * a copy).
+ */
+
+ sraRgnSubtract(updateRegion,updateCopyRegion);
+
+ /*
+ * Finally we leave modifiedRegion to be the remainder (if any) of parts of
+ * the screen which are modified but outside the requestedRegion. We also
+ * empty both the requestedRegion and the copyRegion - note that we never
+ * carry over a copyRegion for a future update.
+ */
+
+
+ sraRgnOr(cl->modifiedRegion,cl->copyRegion);
+ sraRgnSubtract(cl->modifiedRegion,updateRegion);
+ sraRgnSubtract(cl->modifiedRegion,updateCopyRegion);
+
+ sraRgnMakeEmpty(cl->requestedRegion);
+ sraRgnMakeEmpty(cl->copyRegion);
+ cl->copyDX = 0;
+ cl->copyDY = 0;
+
+ UNLOCK(cl->updateMutex);
+
+ /*
+ * Now send the update.
+ */
+
+ cl->rfbFramebufferUpdateMessagesSent++;
+
+ if (cl->preferredEncoding == rfbEncodingCoRRE) {
+ nUpdateRegionRects = 0;
+
+ for(i = sraRgnGetIterator(updateRegion); sraRgnIteratorNext(i,&rect);){
+ int x = rect.x1;
+ int y = rect.y1;
+ int w = rect.x2 - x;
+ int h = rect.y2 - y;
+ nUpdateRegionRects += (((w-1) / cl->correMaxWidth + 1)
+ * ((h-1) / cl->correMaxHeight + 1));
+ }
+ sraRgnReleaseIterator(i);
+#ifdef LIBVNCSERVER_HAVE_LIBZ
+ } else if (cl->preferredEncoding == rfbEncodingZlib) {
+ nUpdateRegionRects = 0;
+
+ for(i = sraRgnGetIterator(updateRegion); sraRgnIteratorNext(i,&rect);){
+ int x = rect.x1;
+ int y = rect.y1;
+ int w = rect.x2 - x;
+ int h = rect.y2 - y;
+ nUpdateRegionRects += (((h-1) / (ZLIB_MAX_SIZE( w ) / w)) + 1);
+ }
+ sraRgnReleaseIterator(i);
+#ifdef LIBVNCSERVER_HAVE_LIBJPEG
+ } else if (cl->preferredEncoding == rfbEncodingTight) {
+ nUpdateRegionRects = 0;
+
+ for(i = sraRgnGetIterator(updateRegion); sraRgnIteratorNext(i,&rect);){
+ int x = rect.x1;
+ int y = rect.y1;
+ int w = rect.x2 - x;
+ int h = rect.y2 - y;
+ int n = rfbNumCodedRectsTight(cl, x, y, w, h);
+ if (n == 0) {
+ nUpdateRegionRects = 0xFFFF;
+ break;
+ }
+ nUpdateRegionRects += n;
+ }
+ sraRgnReleaseIterator(i);
+#endif
+#endif
+ } else {
+ nUpdateRegionRects = sraRgnCountRects(updateRegion);
+ }
+
+ fu->type = rfbFramebufferUpdate;
+ if (nUpdateRegionRects != 0xFFFF) {
+ if(cl->screen->maxRectsPerUpdate>0
+#ifdef LIBVNCSERVER_HAVE_LIBJPEG
+ /* Tight encoding counts the rectangles differently */
+ && cl->preferredEncoding != rfbEncodingTight
+#endif
+ && nUpdateRegionRects>cl->screen->maxRectsPerUpdate) {
+ sraRegion* newUpdateRegion = sraRgnBBox(updateRegion);
+ sraRgnDestroy(updateRegion);
+ updateRegion = newUpdateRegion;
+ nUpdateRegionRects = sraRgnCountRects(updateRegion);
+ }
+ fu->nRects = Swap16IfLE((uint16_t)(sraRgnCountRects(updateCopyRegion) +
+ nUpdateRegionRects +
+ !!sendCursorShape + !!sendCursorPos));
+ } else {
+ fu->nRects = 0xFFFF;
+ }
+ cl->ublen = sz_rfbFramebufferUpdateMsg;
+
+ if (sendCursorShape) {
+ cl->cursorWasChanged = FALSE;
+ if (!rfbSendCursorShape(cl)) {
+ sraRgnDestroy(updateRegion);
+ return FALSE;
+ }
+ }
+
+ if (sendCursorPos) {
+ cl->cursorWasMoved = FALSE;
+ if (!rfbSendCursorPos(cl)) {
+ sraRgnDestroy(updateRegion);
+ return FALSE;
+ }
+ }
+
+ if (!sraRgnEmpty(updateCopyRegion)) {
+ if (!rfbSendCopyRegion(cl,updateCopyRegion,dx,dy)) {
+ sraRgnDestroy(updateRegion);
+ sraRgnDestroy(updateCopyRegion);
+ return FALSE;
+ }
+ }
+
+ sraRgnDestroy(updateCopyRegion);
+
+ for(i = sraRgnGetIterator(updateRegion); sraRgnIteratorNext(i,&rect);){
+ int x = rect.x1;
+ int y = rect.y1;
+ int w = rect.x2 - x;
+ int h = rect.y2 - y;
+
+ cl->rfbRawBytesEquivalent += (sz_rfbFramebufferUpdateRectHeader
+ + w * (cl->format.bitsPerPixel / 8) * h);
+
+ switch (cl->preferredEncoding) {
+ case rfbEncodingRaw:
+ if (!rfbSendRectEncodingRaw(cl, x, y, w, h)) {
+ sraRgnDestroy(updateRegion);
+ sraRgnReleaseIterator(i);
+ return FALSE;
+ }
+ break;
+ case rfbEncodingRRE:
+ if (!rfbSendRectEncodingRRE(cl, x, y, w, h)) {
+ sraRgnDestroy(updateRegion);
+ sraRgnReleaseIterator(i);
+ return FALSE;
+ }
+ break;
+ case rfbEncodingCoRRE:
+ if (!rfbSendRectEncodingCoRRE(cl, x, y, w, h)) {
+ sraRgnDestroy(updateRegion);
+ sraRgnReleaseIterator(i);
+ return FALSE;
+ }
+ break;
+ case rfbEncodingHextile:
+ if (!rfbSendRectEncodingHextile(cl, x, y, w, h)) {
+ sraRgnDestroy(updateRegion);
+ sraRgnReleaseIterator(i);
+ return FALSE;
+ }
+ break;
+#ifdef LIBVNCSERVER_HAVE_LIBZ
+ case rfbEncodingZlib:
+ if (!rfbSendRectEncodingZlib(cl, x, y, w, h)) {
+ sraRgnDestroy(updateRegion);
+ sraRgnReleaseIterator(i);
+ return FALSE;
+ }
+ break;
+#ifdef LIBVNCSERVER_HAVE_LIBJPEG
+ case rfbEncodingTight:
+ if (!rfbSendRectEncodingTight(cl, x, y, w, h)) {
+ sraRgnDestroy(updateRegion);
+ sraRgnReleaseIterator(i);
+ return FALSE;
+ }
+ break;
+#endif
+#endif
+#ifdef LIBVNCSERVER_HAVE_LIBZ
+ case rfbEncodingZRLE:
+ if (!rfbSendRectEncodingZRLE(cl, x, y, w, h)) {
+ sraRgnDestroy(updateRegion);
+ sraRgnReleaseIterator(i);
+ return FALSE;
+ }
+ break;
+#endif
+ }
+ }
+ sraRgnReleaseIterator(i);
+
+ if ( nUpdateRegionRects == 0xFFFF &&
+ !rfbSendLastRectMarker(cl) ) {
+ sraRgnDestroy(updateRegion);
+ return FALSE;
+ }
+
+ if (!rfbSendUpdateBuf(cl)) {
+ sraRgnDestroy(updateRegion);
+ return FALSE;
+ }
+
+ sraRgnDestroy(updateRegion);
+ return TRUE;
+}
+
+
+/*
+ * Send the copy region as a string of CopyRect encoded rectangles.
+ * The only slightly tricky thing is that we should send the messages in
+ * the correct order so that an earlier CopyRect will not corrupt the source
+ * of a later one.
+ */
+
+rfbBool
+rfbSendCopyRegion(cl, reg, dx, dy)
+ rfbClientPtr cl;
+ sraRegionPtr reg;
+ int dx, dy;
+{
+ int x, y, w, h;
+ rfbFramebufferUpdateRectHeader rect;
+ rfbCopyRect cr;
+ sraRectangleIterator* i;
+ sraRect rect1;
+
+ /* printf("copyrect: "); sraRgnPrint(reg); putchar('\n');fflush(stdout); */
+ i = sraRgnGetReverseIterator(reg,dx>0,dy>0);
+
+ while(sraRgnIteratorNext(i,&rect1)) {
+ x = rect1.x1;
+ y = rect1.y1;
+ w = rect1.x2 - x;
+ h = rect1.y2 - y;
+
+ rect.r.x = Swap16IfLE(x);
+ rect.r.y = Swap16IfLE(y);
+ rect.r.w = Swap16IfLE(w);
+ rect.r.h = Swap16IfLE(h);
+ rect.encoding = Swap32IfLE(rfbEncodingCopyRect);
+
+ memcpy(&cl->updateBuf[cl->ublen], (char *)&rect,
+ sz_rfbFramebufferUpdateRectHeader);
+ cl->ublen += sz_rfbFramebufferUpdateRectHeader;
+
+ cr.srcX = Swap16IfLE(x - dx);
+ cr.srcY = Swap16IfLE(y - dy);
+
+ memcpy(&cl->updateBuf[cl->ublen], (char *)&cr, sz_rfbCopyRect);
+ cl->ublen += sz_rfbCopyRect;
+
+ cl->rfbRectanglesSent[rfbEncodingCopyRect]++;
+ cl->rfbBytesSent[rfbEncodingCopyRect]
+ += sz_rfbFramebufferUpdateRectHeader + sz_rfbCopyRect;
+
+ }
+
+ return TRUE;
+}
+
+/*
+ * Send a given rectangle in raw encoding (rfbEncodingRaw).
+ */
+
+rfbBool
+rfbSendRectEncodingRaw(cl, x, y, w, h)
+ rfbClientPtr cl;
+ int x, y, w, h;
+{
+ rfbFramebufferUpdateRectHeader rect;
+ int nlines;
+ int bytesPerLine = w * (cl->format.bitsPerPixel / 8);
+ char *fbptr = (cl->screen->frameBuffer + (cl->screen->paddedWidthInBytes * y)
+ + (x * (cl->screen->bitsPerPixel / 8)));
+
+ /* Flush the buffer to guarantee correct alignment for translateFn(). */
+ if (cl->ublen > 0) {
+ if (!rfbSendUpdateBuf(cl))
+ return FALSE;
+ }
+
+ rect.r.x = Swap16IfLE(x);
+ rect.r.y = Swap16IfLE(y);
+ rect.r.w = Swap16IfLE(w);
+ rect.r.h = Swap16IfLE(h);
+ rect.encoding = Swap32IfLE(rfbEncodingRaw);
+
+ memcpy(&cl->updateBuf[cl->ublen], (char *)&rect,sz_rfbFramebufferUpdateRectHeader);
+ cl->ublen += sz_rfbFramebufferUpdateRectHeader;
+
+ cl->rfbRectanglesSent[rfbEncodingRaw]++;
+ cl->rfbBytesSent[rfbEncodingRaw]
+ += sz_rfbFramebufferUpdateRectHeader + bytesPerLine * h;
+
+ nlines = (UPDATE_BUF_SIZE - cl->ublen) / bytesPerLine;
+
+ while (TRUE) {
+ if (nlines > h)
+ nlines = h;
+
+ (*cl->translateFn)(cl->translateLookupTable,
+ &(cl->screen->rfbServerFormat),
+ &cl->format, fbptr, &cl->updateBuf[cl->ublen],
+ cl->screen->paddedWidthInBytes, w, nlines);
+
+ cl->ublen += nlines * bytesPerLine;
+ h -= nlines;
+
+ if (h == 0) /* rect fitted in buffer, do next one */
+ return TRUE;
+
+ /* buffer full - flush partial rect and do another nlines */
+
+ if (!rfbSendUpdateBuf(cl))
+ return FALSE;
+
+ fbptr += (cl->screen->paddedWidthInBytes * nlines);
+
+ nlines = (UPDATE_BUF_SIZE - cl->ublen) / bytesPerLine;
+ if (nlines == 0) {
+ rfbErr("rfbSendRectEncodingRaw: send buffer too small for %d "
+ "bytes per line\n", bytesPerLine);
+ rfbCloseClient(cl);
+ return FALSE;
+ }
+ }
+}
+
+
+
+/*
+ * Send an empty rectangle with encoding field set to value of
+ * rfbEncodingLastRect to notify client that this is the last
+ * rectangle in framebuffer update ("LastRect" extension of RFB
+ * protocol).
+ */
+
+rfbBool
+rfbSendLastRectMarker(cl)
+ rfbClientPtr cl;
+{
+ rfbFramebufferUpdateRectHeader rect;
+
+ if (cl->ublen + sz_rfbFramebufferUpdateRectHeader > UPDATE_BUF_SIZE) {
+ if (!rfbSendUpdateBuf(cl))
+ return FALSE;
+ }
+
+ rect.encoding = Swap32IfLE(rfbEncodingLastRect);
+ rect.r.x = 0;
+ rect.r.y = 0;
+ rect.r.w = 0;
+ rect.r.h = 0;
+
+ memcpy(&cl->updateBuf[cl->ublen], (char *)&rect,sz_rfbFramebufferUpdateRectHeader);
+ cl->ublen += sz_rfbFramebufferUpdateRectHeader;
+
+ cl->rfbLastRectMarkersSent++;
+ cl->rfbLastRectBytesSent += sz_rfbFramebufferUpdateRectHeader;
+
+ return TRUE;
+}
+
+
+/*
+ * Send NewFBSize pseudo-rectangle. This tells the client to change
+ * its framebuffer size.
+ */
+
+rfbBool
+rfbSendNewFBSize(cl, w, h)
+ rfbClientPtr cl;
+ int w, h;
+{
+ rfbFramebufferUpdateRectHeader rect;
+
+ if (cl->ublen + sz_rfbFramebufferUpdateRectHeader > UPDATE_BUF_SIZE) {
+ if (!rfbSendUpdateBuf(cl))
+ return FALSE;
+ }
+
+ rect.encoding = Swap32IfLE(rfbEncodingNewFBSize);
+ rect.r.x = 0;
+ rect.r.y = 0;
+ rect.r.w = Swap16IfLE(w);
+ rect.r.h = Swap16IfLE(h);
+
+ memcpy(&cl->updateBuf[cl->ublen], (char *)&rect,
+ sz_rfbFramebufferUpdateRectHeader);
+ cl->ublen += sz_rfbFramebufferUpdateRectHeader;
+
+ cl->rfbLastRectMarkersSent++;
+ cl->rfbLastRectBytesSent += sz_rfbFramebufferUpdateRectHeader;
+
+ return TRUE;
+}
+
+
+/*
+ * Send the contents of cl->updateBuf. Returns 1 if successful, -1 if
+ * not (errno should be set).
+ */
+
+rfbBool
+rfbSendUpdateBuf(cl)
+ rfbClientPtr cl;
+{
+ if(cl->sock<0)
+ return FALSE;
+
+ if (WriteExact(cl, cl->updateBuf, cl->ublen) < 0) {
+ rfbLogPerror("rfbSendUpdateBuf: write");
+ rfbCloseClient(cl);
+ return FALSE;
+ }
+
+ cl->ublen = 0;
+ return TRUE;
+}
+
+/*
+ * rfbSendSetColourMapEntries sends a SetColourMapEntries message to the
+ * client, using values from the currently installed colormap.
+ */
+
+rfbBool
+rfbSendSetColourMapEntries(cl, firstColour, nColours)
+ rfbClientPtr cl;
+ int firstColour;
+ int nColours;
+{
+ char buf[sz_rfbSetColourMapEntriesMsg + 256 * 3 * 2];
+ rfbSetColourMapEntriesMsg *scme = (rfbSetColourMapEntriesMsg *)buf;
+ uint16_t *rgb = (uint16_t *)(&buf[sz_rfbSetColourMapEntriesMsg]);
+ rfbColourMap* cm = &cl->screen->colourMap;
+
+ int i, len;
+
+ scme->type = rfbSetColourMapEntries;
+
+ scme->firstColour = Swap16IfLE(firstColour);
+ scme->nColours = Swap16IfLE(nColours);
+
+ len = sz_rfbSetColourMapEntriesMsg;
+
+ for (i = 0; i < nColours; i++) {
+ if(i<(int)cm->count) {
+ if(cm->is16) {
+ rgb[i*3] = Swap16IfLE(cm->data.shorts[i*3]);
+ rgb[i*3+1] = Swap16IfLE(cm->data.shorts[i*3+1]);
+ rgb[i*3+2] = Swap16IfLE(cm->data.shorts[i*3+2]);
+ } else {
+ rgb[i*3] = Swap16IfLE(cm->data.bytes[i*3]);
+ rgb[i*3+1] = Swap16IfLE(cm->data.bytes[i*3+1]);
+ rgb[i*3+2] = Swap16IfLE(cm->data.bytes[i*3+2]);
+ }
+ }
+ }
+
+ len += nColours * 3 * 2;
+
+ if (WriteExact(cl, buf, len) < 0) {
+ rfbLogPerror("rfbSendSetColourMapEntries: write");
+ rfbCloseClient(cl);
+ return FALSE;
+ }
+ return TRUE;
+}
+
+/*
+ * rfbSendBell sends a Bell message to all the clients.
+ */
+
+void
+rfbSendBell(rfbScreenInfoPtr rfbScreen)
+{
+ rfbClientIteratorPtr i;
+ rfbClientPtr cl;
+ rfbBellMsg b;
+
+ i = rfbGetClientIterator(rfbScreen);
+ while((cl=rfbClientIteratorNext(i))) {
+ b.type = rfbBell;
+ if (WriteExact(cl, (char *)&b, sz_rfbBellMsg) < 0) {
+ rfbLogPerror("rfbSendBell: write");
+ rfbCloseClient(cl);
+ }
+ }
+ rfbReleaseClientIterator(i);
+}
+
+
+/*
+ * rfbSendServerCutText sends a ServerCutText message to all the clients.
+ */
+
+void
+rfbSendServerCutText(rfbScreenInfoPtr rfbScreen,char *str, int len)
+{
+ rfbClientPtr cl;
+ rfbServerCutTextMsg sct;
+ rfbClientIteratorPtr iterator;
+
+ iterator = rfbGetClientIterator(rfbScreen);
+ while ((cl = rfbClientIteratorNext(iterator)) != NULL) {
+ sct.type = rfbServerCutText;
+ sct.length = Swap32IfLE(len);
+ if (WriteExact(cl, (char *)&sct,
+ sz_rfbServerCutTextMsg) < 0) {
+ rfbLogPerror("rfbSendServerCutText: write");
+ rfbCloseClient(cl);
+ continue;
+ }
+ if (WriteExact(cl, str, len) < 0) {
+ rfbLogPerror("rfbSendServerCutText: write");
+ rfbCloseClient(cl);
+ }
+ }
+ rfbReleaseClientIterator(iterator);
+}
+
+/*****************************************************************************
+ *
+ * UDP can be used for keyboard and pointer events when the underlying
+ * network is highly reliable. This is really here to support ORL's
+ * videotile, whose TCP implementation doesn't like sending lots of small
+ * packets (such as 100s of pen readings per second!).
+ */
+
+unsigned char ptrAcceleration = 50;
+
+void
+rfbNewUDPConnection(rfbScreen,sock)
+ rfbScreenInfoPtr rfbScreen;
+ int sock;
+{
+ if (write(sock, &ptrAcceleration, 1) < 0) {
+ rfbLogPerror("rfbNewUDPConnection: write");
+ }
+}
+
+/*
+ * Because UDP is a message based service, we can't read the first byte and
+ * then the rest of the packet separately like we do with TCP. We will always
+ * get a whole packet delivered in one go, so we ask read() for the maximum
+ * number of bytes we can possibly get.
+ */
+
+void
+rfbProcessUDPInput(rfbScreenInfoPtr rfbScreen)
+{
+ int n;
+ rfbClientPtr cl=rfbScreen->udpClient;
+ rfbClientToServerMsg msg;
+
+ if((!cl) || cl->onHold)
+ return;
+
+ if ((n = read(rfbScreen->udpSock, (char *)&msg, sizeof(msg))) <= 0) {
+ if (n < 0) {
+ rfbLogPerror("rfbProcessUDPInput: read");
+ }
+ rfbDisconnectUDPSock(rfbScreen);
+ return;
+ }
+
+ switch (msg.type) {
+
+ case rfbKeyEvent:
+ if (n != sz_rfbKeyEventMsg) {
+ rfbErr("rfbProcessUDPInput: key event incorrect length\n");
+ rfbDisconnectUDPSock(rfbScreen);
+ return;
+ }
+ cl->screen->kbdAddEvent(msg.ke.down, (rfbKeySym)Swap32IfLE(msg.ke.key), cl);
+ break;
+
+ case rfbPointerEvent:
+ if (n != sz_rfbPointerEventMsg) {
+ rfbErr("rfbProcessUDPInput: ptr event incorrect length\n");
+ rfbDisconnectUDPSock(rfbScreen);
+ return;
+ }
+ cl->screen->ptrAddEvent(msg.pe.buttonMask,
+ Swap16IfLE(msg.pe.x), Swap16IfLE(msg.pe.y), cl);
+ break;
+
+ default:
+ rfbErr("rfbProcessUDPInput: unknown message type %d\n",
+ msg.type);
+ rfbDisconnectUDPSock(rfbScreen);
+ }
+}
+
+#ifdef LIBVNCSERVER_BACKCHANNEL
+void rfbSendBackChannel(rfbScreenInfoPtr rfbScreen,char* str,int len)
+{
+ rfbClientPtr cl;
+ rfbBackChannelMsg sct;
+ rfbClientIteratorPtr iterator;
+
+ iterator = rfbGetClientIterator(rfbScreen);
+ while ((cl = rfbClientIteratorNext(iterator)) != NULL) {
+ if (cl->enableBackChannel) {
+ sct.type = rfbBackChannel;
+ sct.length = Swap32IfLE(len);
+ if (WriteExact(cl, (char *)&sct,
+ sz_rfbBackChannelMsg) < 0) {
+ rfbLogPerror("rfbSendBackChannel: write");
+ rfbCloseClient(cl);
+ continue;
+ }
+ if (WriteExact(cl, str, len) < 0) {
+ rfbLogPerror("rfbSendBackChannel: write");
+ rfbCloseClient(cl);
+ }
+ }
+ }
+ rfbReleaseClientIterator(iterator);
+}
+#endif
generated by cgit v1.2.1 (git 2.18.0) at 2024-04-25 01:10:47 +0000