/* * rfbserver.c - deal with server-side of the RFB protocol. */ /* * Copyright (C) 2005 Rohit Kumar, Johannes E. Schindelin * Copyright (C) 2002 RealVNC Ltd. * OSXvnc Copyright (C) 2001 Dan McGuirk . * 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. */ #ifdef __STRICT_ANSI__ #define _BSD_SOURCE #endif #include #include #include #include "private.h" #ifdef LIBVNCSERVER_HAVE_FCNTL_H #include #endif #ifdef WIN32 #define write(sock,buf,len) send(sock,buf,len,0) #else #ifdef LIBVNCSERVER_HAVE_UNISTD_H #include #endif #include #ifdef LIBVNCSERVER_HAVE_SYS_SOCKET_H #include #endif #ifdef LIBVNCSERVER_HAVE_NETINET_IN_H #include #include #include #endif #endif #ifdef CORBA #include #endif #ifdef DEBUGPROTO #undef DEBUGPROTO #define DEBUGPROTO(x) x #else #define DEBUGPROTO(x) #endif #include #include /* stst() */ #include #include #include /* readdir() */ #include /* errno */ #include 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 static MUTEX(rfbClientListMutex); #endif struct rfbClientIterator { rfbClientPtr next; rfbScreenInfoPtr screen; rfbBool closedToo; }; void rfbClientListInit(rfbScreenInfoPtr rfbScreen) { if(sizeof(rfbBool)!=1) { /* a sanity check */ fprintf(stderr,"rfbBool's size is not 1 (%d)!\n",(int)sizeof(rfbBool)); /* we cannot continue, because rfbBool is supposed to be char everywhere */ exit(1); } rfbScreen->clientHead = NULL; INIT_MUTEX(rfbClientListMutex); } rfbClientIteratorPtr rfbGetClientIterator(rfbScreenInfoPtr rfbScreen) { rfbClientIteratorPtr i = (rfbClientIteratorPtr)malloc(sizeof(struct rfbClientIterator)); i->next = NULL; i->screen = rfbScreen; i->closedToo = FALSE; return i; } rfbClientIteratorPtr rfbGetClientIteratorWithClosed(rfbScreenInfoPtr rfbScreen) { rfbClientIteratorPtr i = (rfbClientIteratorPtr)malloc(sizeof(struct rfbClientIterator)); i->next = NULL; i->screen = rfbScreen; i->closedToo = TRUE; return i; } rfbClientPtr rfbClientIteratorHead(rfbClientIteratorPtr i) { #ifdef LIBVNCSERVER_HAVE_LIBPTHREAD if(i->next != 0) { rfbDecrClientRef(i->next); rfbIncrClientRef(i->screen->clientHead); } #endif LOCK(rfbClientListMutex); i->next = i->screen->clientHead; UNLOCK(rfbClientListMutex); return i->next; } rfbClientPtr rfbClientIteratorNext(rfbClientIteratorPtr i) { if(i->next == 0) { LOCK(rfbClientListMutex); i->next = i->screen->clientHead; UNLOCK(rfbClientListMutex); } else { IF_PTHREADS(rfbClientPtr cl = i->next); i->next = i->next->next; IF_PTHREADS(rfbDecrClientRef(cl)); } #ifdef LIBVNCSERVER_HAVE_LIBPTHREAD if(!i->closedToo) 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(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(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; } void rfbSetProtocolVersion(rfbScreenInfoPtr rfbScreen, int major_, int minor_) { /* Permit the server to set the version to report */ /* TODO: sanity checking */ if ((major_==3) && (minor_ > 2 && minor_ < 9)) { rfbScreen->protocolMajorVersion = major_; rfbScreen->protocolMinorVersion = minor_; } else rfbLog("rfbSetProtocolVersion(%d,%d) set to invalid values\n", major_, minor_); } /* * rfbNewClient is called when a new connection has been made by whatever * means. */ static rfbClientPtr rfbNewTCPOrUDPClient(rfbScreenInfoPtr rfbScreen, int sock, rfbBool isUDP) { rfbProtocolVersionMsg pv; rfbClientIteratorPtr iterator; rfbClientPtr cl,cl_; struct sockaddr_in addr; socklen_t addrlen = sizeof(struct sockaddr_in); rfbProtocolExtension* extension; cl = (rfbClientPtr)calloc(sizeof(rfbClientRec),1); cl->screen = rfbScreen; cl->sock = sock; cl->viewOnly = FALSE; /* setup pseudo scaling */ cl->scaledScreen = rfbScreen; cl->scaledScreen->scaledScreenRefCount++; rfbResetStats(cl); cl->clientData = NULL; cl->clientGoneHook = rfbDoNothingWithClient; 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 = -1; cl->correMaxWidth = 48; cl->correMaxHeight = 48; #ifdef LIBVNCSERVER_HAVE_LIBZ cl->zrleData = NULL; #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->serverFormat; cl->translateFn = rfbTranslateNone; cl->translateLookupTable = NULL; LOCK(rfbClientListMutex); IF_PTHREADS(cl->refCount = 0); cl->next = rfbScreen->clientHead; cl->prev = NULL; if (rfbScreen->clientHead) rfbScreen->clientHead->prev = cl; rfbScreen->clientHead = cl; UNLOCK(rfbClientListMutex); #ifdef LIBVNCSERVER_HAVE_LIBZ #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 #endif cl->fileTransfer.fd = -1; cl->enableCursorShapeUpdates = FALSE; cl->enableCursorPosUpdates = FALSE; cl->useRichCursorEncoding = FALSE; cl->enableLastRectEncoding = FALSE; cl->enableKeyboardLedState = FALSE; cl->enableSupportedMessages = FALSE; cl->enableSupportedEncodings = FALSE; cl->enableServerIdentity = FALSE; cl->lastKeyboardLedState = -1; cl->cursorX = rfbScreen->cursorX; cl->cursorY = rfbScreen->cursorY; 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; cl->extensions = NULL; cl->lastPtrX = -1; sprintf(pv,rfbProtocolVersionFormat,rfbScreen->protocolMajorVersion, rfbScreen->protocolMinorVersion); if (rfbWriteExact(cl, pv, sz_rfbProtocolVersionMsg) < 0) { rfbLogPerror("rfbNewClient: write"); rfbCloseClient(cl); rfbClientConnectionGone(cl); return NULL; } } for(extension = rfbGetExtensionIterator(); extension; extension=extension->next) { void* data = NULL; /* if the extension does not have a newClient method, it wants * to be initialized later. */ if(extension->newClient && extension->newClient(cl, &data)) rfbEnableExtension(cl, extension, data); } rfbReleaseExtensionIterator(); 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(rfbScreenInfoPtr rfbScreen, int sock) { return(rfbNewTCPOrUDPClient(rfbScreen,sock,FALSE)); } rfbClientPtr rfbNewUDPClient(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(rfbClientPtr cl) { #ifdef LIBVNCSERVER_HAVE_LIBJPEG int i; #endif LOCK(rfbClientListMutex); if (cl->prev) cl->prev->next = cl->next; else cl->screen->clientHead = cl->next; if (cl->next) cl->next->prev = cl->prev; if(cl->sock>0) close(cl->sock); if (cl->scaledScreen!=NULL) cl->scaledScreen->scaledScreenRefCount--; #ifdef LIBVNCSERVER_HAVE_LIBZ rfbFreeZrleData(cl); #endif #ifdef LIBVNCSERVER_HAVE_LIBPTHREAD if(cl->screen->backgroundLoop != FALSE) { int i; do { LOCK(cl->refCountMutex); i=cl->refCount; UNLOCK(cl->refCountMutex); if(i>0) WAIT(cl->deleteCond,cl->refCountMutex); } while(i>0); } #endif UNLOCK(rfbClientListMutex); 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 (cl->screen->pointerClient == cl) cl->screen->pointerClient = NULL; sraRgnDestroy(cl->modifiedRegion); sraRgnDestroy(cl->requestedRegion); sraRgnDestroy(cl->copyRegion); if (cl->translateLookupTable) free(cl->translateLookupTable); TINI_COND(cl->updateCond); TINI_MUTEX(cl->updateMutex); /* make sure outputMutex is unlocked before destroying */ LOCK(cl->outputMutex); UNLOCK(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(rfbClientPtr cl) { switch (cl->state) { case RFB_PROTOCOL_VERSION: rfbProcessClientProtocolVersion(cl); return; case RFB_SECURITY_TYPE: rfbProcessClientSecurityType(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(rfbClientPtr cl) { rfbProtocolVersionMsg pv; int n, major_, minor_; char failureReason[256]; if ((n = rfbReadExact(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 %1023s\n",&major_,&minor_,name) != 3) { rfbErr("rfbProcessClientProtocolVersion: not a valid RFB client\n"); rfbCloseClient(cl); return; } free(cl->host); cl->host=strdup(name); } rfbLog("Client 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", cl->screen->protocolMajorVersion, cl->screen->protocolMinorVersion, major_,minor_); rfbClientConnFailed(cl, failureReason); return; } /* Check for the minor version use either of the two standard version of RFB */ /* * UltraVNC Viewer detects FileTransfer compatible servers via rfb versions * 3.4, 3.6, 3.14, 3.16 * It's a bad method, but it is what they use to enable features... * maintaining RFB version compatibility across multiple servers is a pain * Should use something like ServerIdentity encoding */ cl->protocolMinorVersion = minor_; rfbLog("Protocol version sent %d.%d, using %d.%d\n", major_, minor_, rfbProtocolMajorVersion, cl->protocolMinorVersion); 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(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 (rfbWriteExact(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(rfbClientPtr cl) { rfbClientInitMsg ci; char buf[256]; rfbServerInitMsg *si = (rfbServerInitMsg *)buf; int len, n; rfbClientIteratorPtr iterator; rfbClientPtr otherCl; rfbExtensionData* extension; if ((n = rfbReadExact(cl, (char *)&ci,sz_rfbClientInitMsg)) <= 0) { if (n == 0) rfbLog("rfbProcessClientInitMessage: client gone\n"); else rfbLogPerror("rfbProcessClientInitMessage: read"); rfbCloseClient(cl); return; } memset(buf,0,sizeof(buf)); si->framebufferWidth = Swap16IfLE(cl->screen->width); si->framebufferHeight = Swap16IfLE(cl->screen->height); si->format = cl->screen->serverFormat; si->format.redMax = Swap16IfLE(si->format.redMax); si->format.greenMax = Swap16IfLE(si->format.greenMax); si->format.blueMax = Swap16IfLE(si->format.blueMax); strncpy(buf + sz_rfbServerInitMsg, cl->screen->desktopName, 127); len = strlen(buf + sz_rfbServerInitMsg); si->nameLength = Swap32IfLE(len); if (rfbWriteExact(cl, buf, sz_rfbServerInitMsg + len) < 0) { rfbLogPerror("rfbProcessClientInitMessage: write"); rfbCloseClient(cl); return; } for(extension = cl->extensions; extension;) { rfbExtensionData* next = extension->next; if(extension->extension->init && !extension->extension->init(cl, extension->data)) /* extension requested that it be removed */ rfbDisableExtension(cl, extension->extension); extension = next; } cl->state = RFB_NORMAL; if (!cl->reverseConnection && (cl->screen->neverShared || (!cl->screen->alwaysShared && !ci.shared))) { if (cl->screen->dontDisconnect) { 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); } } } /* The values come in based on the scaled screen, we need to convert them to * values based on the man screen's coordinate system */ static rfbBool rectSwapIfLEAndClip(uint16_t* x,uint16_t* y,uint16_t* w,uint16_t* h, rfbClientPtr cl) { int x1=Swap16IfLE(*x); int y1=Swap16IfLE(*y); int w1=Swap16IfLE(*w); int h1=Swap16IfLE(*h); rfbScaledCorrection(cl->scaledScreen, cl->screen, &x1, &y1, &w1, &h1, "rectSwapIfLEAndClip"); *x = x1; *y = y1; *w = w1; *h = h1; if(*w>cl->screen->width-*x) *w=cl->screen->width-*x; /* possible underflow */ if(*w>cl->screen->width-*x) return FALSE; if(*h>cl->screen->height-*y) *h=cl->screen->height-*y; if(*h>cl->screen->height-*y) return FALSE; return TRUE; } /* * Send keyboard state (PointerPos pseudo-encoding). */ rfbBool rfbSendKeyboardLedState(rfbClientPtr cl) { rfbFramebufferUpdateRectHeader rect; if (cl->ublen + sz_rfbFramebufferUpdateRectHeader > UPDATE_BUF_SIZE) { if (!rfbSendUpdateBuf(cl)) return FALSE; } rect.encoding = Swap32IfLE(rfbEncodingKeyboardLedState); rect.r.x = Swap16IfLE(cl->lastKeyboardLedState); 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; rfbStatRecordEncodingSent(cl, rfbEncodingKeyboardLedState, sz_rfbFramebufferUpdateRectHeader, sz_rfbFramebufferUpdateRectHeader); if (!rfbSendUpdateBuf(cl)) return FALSE; return TRUE; } #define rfbSetBit(buffer, position) (buffer[(position & 255) / 8] |= (1 << (position % 8))) /* * Send rfbEncodingSupportedMessages. */ rfbBool rfbSendSupportedMessages(rfbClientPtr cl) { rfbFramebufferUpdateRectHeader rect; rfbSupportedMessages msgs; if (cl->ublen + sz_rfbFramebufferUpdateRectHeader + sz_rfbSupportedMessages > UPDATE_BUF_SIZE) { if (!rfbSendUpdateBuf(cl)) return FALSE; } rect.encoding = Swap32IfLE(rfbEncodingSupportedMessages); rect.r.x = 0; rect.r.y = 0; rect.r.w = Swap16IfLE(sz_rfbSupportedMessages); rect.r.h = 0; memcpy(&cl->updateBuf[cl->ublen], (char *)&rect, sz_rfbFramebufferUpdateRectHeader); cl->ublen += sz_rfbFramebufferUpdateRectHeader; memset((char *)&msgs, 0, sz_rfbSupportedMessages); rfbSetBit(msgs.client2server, rfbSetPixelFormat); rfbSetBit(msgs.client2server, rfbFixColourMapEntries); rfbSetBit(msgs.client2server, rfbSetEncodings); rfbSetBit(msgs.client2server, rfbFramebufferUpdateRequest); rfbSetBit(msgs.client2server, rfbKeyEvent); rfbSetBit(msgs.client2server, rfbPointerEvent); rfbSetBit(msgs.client2server, rfbClientCutText); rfbSetBit(msgs.client2server, rfbFileTransfer); rfbSetBit(msgs.client2server, rfbSetScale); /*rfbSetBit(msgs.client2server, rfbSetServerInput); */ /*rfbSetBit(msgs.client2server, rfbSetSW); */ /*rfbSetBit(msgs.client2server, rfbTextChat); */ /*rfbSetBit(msgs.client2server, rfbKeyFrameRequest); */ rfbSetBit(msgs.client2server, rfbPalmVNCSetScaleFactor); rfbSetBit(msgs.server2client, rfbFramebufferUpdate); rfbSetBit(msgs.server2client, rfbSetColourMapEntries); rfbSetBit(msgs.server2client, rfbBell); rfbSetBit(msgs.server2client, rfbServerCutText); rfbSetBit(msgs.server2client, rfbResizeFrameBuffer); /*rfbSetBit(msgs.server2client, rfbKeyFrameUpdate); */ rfbSetBit(msgs.server2client, rfbPalmVNCReSizeFrameBuffer); memcpy(&cl->updateBuf[cl->ublen], (char *)&msgs, sz_rfbSupportedMessages); cl->ublen += sz_rfbSupportedMessages; rfbStatRecordEncodingSent(cl, rfbEncodingSupportedMessages, sz_rfbFramebufferUpdateRectHeader+sz_rfbSupportedMessages, sz_rfbFramebufferUpdateRectHeader+sz_rfbSupportedMessages); if (!rfbSendUpdateBuf(cl)) return FALSE; return TRUE; } static void rfbSendSupporteddEncodings_SendEncoding(rfbClientPtr cl, uint32_t enc) { uint32_t nSwapped=0; nSwapped = Swap32IfLE(enc); memcpy(&cl->updateBuf[cl->ublen], (char *)&nSwapped, sizeof(nSwapped)); cl->ublen+=sizeof(nSwapped); } /* * Send rfbEncodingSupportedEncodings. */ rfbBool rfbSendSupportedEncodings(rfbClientPtr cl) { rfbFramebufferUpdateRectHeader rect; uint16_t nEncodings=0; /* think rfbSetEncodingsMsg */ /* TODO: dynamic way of doing this */ nEncodings=16; #ifdef LIBVNCSERVER_HAVE_LIBZ nEncodings += 2; #endif #ifdef LIBVNCSERVER_HAVE_LIBZ nEncodings++; #endif if (cl->ublen + sz_rfbFramebufferUpdateRectHeader + (nEncodings*sizeof(uint32_t)) > UPDATE_BUF_SIZE) { if (!rfbSendUpdateBuf(cl)) return FALSE; } rect.encoding = Swap32IfLE(rfbEncodingSupportedEncodings); rect.r.x = 0; rect.r.y = 0; rect.r.w = Swap16IfLE(nEncodings * sizeof(uint32_t)); rect.r.h = Swap16IfLE(nEncodings); memcpy(&cl->updateBuf[cl->ublen], (char *)&rect, sz_rfbFramebufferUpdateRectHeader); cl->ublen += sz_rfbFramebufferUpdateRectHeader; rfbSendSupporteddEncodings_SendEncoding(cl, rfbEncodingRaw); rfbSendSupporteddEncodings_SendEncoding(cl, rfbEncodingCopyRect); rfbSendSupporteddEncodings_SendEncoding(cl, rfbEncodingRRE); rfbSendSupporteddEncodings_SendEncoding(cl, rfbEncodingCoRRE); rfbSendSupporteddEncodings_SendEncoding(cl, rfbEncodingHextile); #ifdef LIBVNCSERVER_HAVE_LIBZ rfbSendSupporteddEncodings_SendEncoding(cl, rfbEncodingZlib); rfbSendSupporteddEncodings_SendEncoding(cl, rfbEncodingTight); #endif #ifdef LIBVNCSERVER_HAVE_LIBZ rfbSendSupporteddEncodings_SendEncoding(cl, rfbEncodingZRLE); #endif rfbSendSupporteddEncodings_SendEncoding(cl, rfbEncodingUltra); rfbSendSupporteddEncodings_SendEncoding(cl, rfbEncodingUltraZip); rfbSendSupporteddEncodings_SendEncoding(cl, rfbEncodingXCursor); rfbSendSupporteddEncodings_SendEncoding(cl, rfbEncodingRichCursor); rfbSendSupporteddEncodings_SendEncoding(cl, rfbEncodingPointerPos); rfbSendSupporteddEncodings_SendEncoding(cl, rfbEncodingLastRect); rfbSendSupporteddEncodings_SendEncoding(cl, rfbEncodingNewFBSize); rfbSendSupporteddEncodings_SendEncoding(cl, rfbEncodingKeyboardLedState); rfbSendSupporteddEncodings_SendEncoding(cl, rfbEncodingSupportedMessages); rfbSendSupporteddEncodings_SendEncoding(cl, rfbEncodingSupportedEncodings); rfbSendSupporteddEncodings_SendEncoding(cl, rfbEncodingServerIdentity); rfbStatRecordEncodingSent(cl, rfbEncodingSupportedEncodings, sz_rfbFramebufferUpdateRectHeader+(nEncodings * sizeof(uint32_t)), sz_rfbFramebufferUpdateRectHeader+(nEncodings * sizeof(uint32_t))); if (!rfbSendUpdateBuf(cl)) return FALSE; return TRUE; } void rfbSetServerVersionIdentity(rfbScreenInfoPtr screen, char *fmt, ...) { char buffer[256]; va_list ap; va_start(ap, fmt); vsnprintf(buffer, sizeof(buffer)-1, fmt, ap); va_end(ap); if (screen->versionString!=NULL) free(screen->versionString); screen->versionString = strdup(buffer); } /* * Send rfbEncodingServerIdentity. */ rfbBool rfbSendServerIdentity(rfbClientPtr cl) { rfbFramebufferUpdateRectHeader rect; char buffer[512]; /* tack on our library version */ snprintf(buffer,sizeof(buffer)-1, "%s (%s)", (cl->screen->versionString==NULL ? "unknown" : cl->screen->versionString), LIBVNCSERVER_PACKAGE_STRING); if (cl->ublen + sz_rfbFramebufferUpdateRectHeader + (strlen(buffer)+1) > UPDATE_BUF_SIZE) { if (!rfbSendUpdateBuf(cl)) return FALSE; } rect.encoding = Swap32IfLE(rfbEncodingServerIdentity); rect.r.x = 0; rect.r.y = 0; rect.r.w = Swap16IfLE(strlen(buffer)+1); rect.r.h = 0; memcpy(&cl->updateBuf[cl->ublen], (char *)&rect, sz_rfbFramebufferUpdateRectHeader); cl->ublen += sz_rfbFramebufferUpdateRectHeader; memcpy(&cl->updateBuf[cl->ublen], buffer, strlen(buffer)+1); cl->ublen += strlen(buffer)+1; rfbStatRecordEncodingSent(cl, rfbEncodingServerIdentity, sz_rfbFramebufferUpdateRectHeader+strlen(buffer)+1, sz_rfbFramebufferUpdateRectHeader+strlen(buffer)+1); if (!rfbSendUpdateBuf(cl)) return FALSE; return TRUE; } rfbBool rfbSendTextChatMessage(rfbClientPtr cl, uint32_t length, char *buffer) { rfbTextChatMsg tc; int bytesToSend=0; memset((char *)&tc, 0, sizeof(tc)); tc.type = rfbTextChat; tc.length = Swap32IfLE(length); switch(length) { case rfbTextChatOpen: case rfbTextChatClose: case rfbTextChatFinished: bytesToSend=0; break; default: bytesToSend=length; if (bytesToSend>rfbTextMaxSize) bytesToSend=rfbTextMaxSize; } if (cl->ublen + sz_rfbTextChatMsg + bytesToSend > UPDATE_BUF_SIZE) { if (!rfbSendUpdateBuf(cl)) return FALSE; } memcpy(&cl->updateBuf[cl->ublen], (char *)&tc, sz_rfbTextChatMsg); cl->ublen += sz_rfbTextChatMsg; if (bytesToSend>0) { memcpy(&cl->updateBuf[cl->ublen], buffer, bytesToSend); cl->ublen += bytesToSend; } rfbStatRecordMessageSent(cl, rfbTextChat, sz_rfbTextChatMsg+bytesToSend, sz_rfbTextChatMsg+bytesToSend); if (!rfbSendUpdateBuf(cl)) return FALSE; return TRUE; } rfbBool rfbSendFileTransferMessage(rfbClientPtr cl, uint8_t contentType, uint8_t contentParam, uint32_t size, uint32_t length, char *buffer) { rfbFileTransferMsg ft; ft.type = rfbFileTransfer; ft.contentType = contentType; ft.contentParam = contentParam; ft.pad = 0; /* UltraVNC did not Swap16LE(ft.contentParam) (Looks like it might be BigEndian) */ ft.size = Swap32IfLE(size); ft.length = Swap32IfLE(length); /* rfbLog("rfbSendFileTransferMessage( %dtype, %dparam, %dsize, %dlen, %p)\n", contentType, contentParam, size, length, buffer); */ if (rfbWriteExact(cl, (char *)&ft, sz_rfbFileTransferMsg) < 0) { rfbLogPerror("rfbSendFileTransferMessage: write"); rfbCloseClient(cl); return FALSE; } if (length>0) { if (rfbWriteExact(cl, buffer, length) < 0) { rfbLogPerror("rfbSendFileTransferMessage: write"); rfbCloseClient(cl); return FALSE; } } rfbStatRecordMessageSent(cl, rfbFileTransfer, sz_rfbFileTransferMsg+length, sz_rfbFileTransferMsg+length); return TRUE; } /* * UltraVNC uses Windows Structures */ #define MAX_PATH 260 typedef struct _FILETIME { uint32_t dwLowDateTime; uint32_t dwHighDateTime; } FILETIME; typedef struct _WIN32_FIND_DATA { uint32_t dwFileAttributes; FILETIME ftCreationTime; FILETIME ftLastAccessTime; FILETIME ftLastWriteTime; uint32_t nFileSizeHigh; uint32_t nFileSizeLow; uint32_t dwReserved0; uint32_t dwReserved1; uint8_t cFileName[ MAX_PATH ]; uint8_t cAlternateFileName[ 14 ]; } WIN32_FIND_DATA; #define FILE_ATTRIBUTE_READONLY 0x1 #define FILE_ATTRIBUTE_HIDDEN 0x2 #define FILE_ATTRIBUTE_SYSTEM 0x4 #define FILE_ATTRIBUTE_DIRECTORY 0x10 #define FILE_ATTRIBUTE_ARCHIVE 0x20 #define FILE_ATTRIBUTE_NORMAL 0x80 #define FILE_ATTRIBUTE_TEMPORARY 0x100 #define FILE_ATTRIBUTE_COMPRESSED 0x800 rfbBool rfbFilenameTranslate2UNIX(rfbClientPtr cl, char *path, char *unixPath) { int x; char *home=NULL; /* C: */ if (path[0]=='C' && path[1]==':') strcpy(unixPath, &path[2]); else { home = getenv("HOME"); if (home!=NULL) { strcpy(unixPath, home); strcat(unixPath,"/"); strcat(unixPath, path); } else strcpy(unixPath, path); } for (x=0;x\"%s\"\n",buffer, path); // */ dirp=opendir(path); if (dirp==NULL) return rfbSendFileTransferMessage(cl, rfbDirPacket, rfbADirectory, 0, 0, NULL); /* send back the path name (necessary for links) */ if (rfbSendFileTransferMessage(cl, rfbDirPacket, rfbADirectory, 0, length, buffer)==FALSE) return FALSE; for (direntp=readdir(dirp); direntp!=NULL; direntp=readdir(dirp)) { /* get stats */ snprintf(retfilename,sizeof(retfilename),"%s/%s", path, direntp->d_name); retval = stat(retfilename, &statbuf); if (retval==0) { memset((char *)&win32filename, 0, sizeof(win32filename)); win32filename.dwFileAttributes = Swap32IfBE(FILE_ATTRIBUTE_NORMAL); if (S_ISDIR(statbuf.st_mode)) win32filename.dwFileAttributes = Swap32IfBE(FILE_ATTRIBUTE_DIRECTORY); win32filename.ftCreationTime.dwLowDateTime = Swap32IfBE(statbuf.st_ctime); /* Intel Order */ win32filename.ftCreationTime.dwHighDateTime = 0; win32filename.ftLastAccessTime.dwLowDateTime = Swap32IfBE(statbuf.st_atime); /* Intel Order */ win32filename.ftLastAccessTime.dwHighDateTime = 0; win32filename.ftLastWriteTime.dwLowDateTime = Swap32IfBE(statbuf.st_mtime); /* Intel Order */ win32filename.ftLastWriteTime.dwHighDateTime = 0; win32filename.nFileSizeLow = Swap32IfBE(statbuf.st_size); /* Intel Order */ win32filename.nFileSizeHigh = 0; win32filename.dwReserved0 = 0; win32filename.dwReserved1 = 0; /* If this had the full path, we would need to translate to DOS format ("C:\") */ /* rfbFilenameTranslate2DOS(cl, retfilename, win32filename.cFileName); */ strcpy((char *)win32filename.cFileName, direntp->d_name); /* Do not show hidden files (but show how to move up the tree) */ if ((strcmp(direntp->d_name, "..")==0) || (direntp->d_name[0]!='.')) { nOptLen = sizeof(WIN32_FIND_DATA) - MAX_PATH - 14 + strlen((char *)win32filename.cFileName); /* rfbLog("rfbProcessFileTransfer() rfbDirContentRequest: rfbRDirContent: Sending \"%s\"\n", (char *)win32filename.cFileName); */ if (rfbSendFileTransferMessage(cl, rfbDirPacket, rfbADirectory, 0, nOptLen, (char *)&win32filename)==FALSE) return FALSE; } } } closedir(dirp); /* End of the transfer */ return rfbSendFileTransferMessage(cl, rfbDirPacket, 0, 0, 0, NULL); } char *rfbProcessFileTransferReadBuffer(rfbClientPtr cl, uint32_t length) { char *buffer=NULL; int n=0; /* rfbLog("rfbProcessFileTransferReadBuffer(%dlen)\n", length); */ if (length>0) { buffer=malloc(length+1); if (buffer!=NULL) { if ((n = rfbReadExact(cl, (char *)buffer, length)) <= 0) { if (n != 0) rfbLogPerror("rfbProcessFileTransferReadBuffer: read"); rfbCloseClient(cl); /* NOTE: don't forget to free(buffer) if you return early! */ if (buffer!=NULL) free(buffer); return NULL; } /* Null Terminate */ buffer[length]=0; } } return buffer; } rfbBool rfbSendFileTransferChunk(rfbClientPtr cl) { /* Allocate buffer for compression */ unsigned char readBuf[sz_rfbBlockSize]; int bytesRead=0; int retval=0; fd_set wfds; struct timeval tv; int n; #ifdef LIBVNCSERVER_HAVE_LIBZ unsigned char compBuf[sz_rfbBlockSize + 1024]; unsigned long nMaxCompSize = sizeof(compBuf); int nRetC = 0; #endif /* If not sending, or no file open... Return as if we sent something! */ if ((cl->fileTransfer.fd!=-1) && (cl->fileTransfer.sending==1)) { FD_ZERO(&wfds); FD_SET(cl->sock, &wfds); /* return immediately */ tv.tv_sec = 0; tv.tv_usec = 0; n = select(cl->sock + 1, NULL, &wfds, NULL, &tv); if (n<1) rfbLog("rfbSendFileTransferChunk() select failed: %s\n", strerror(errno)); /* We have space on the transmit queue */ if (n > 0) { bytesRead = read(cl->fileTransfer.fd, readBuf, sz_rfbBlockSize); switch (bytesRead) { case 0: /* rfbLog("rfbSendFileTransferChunk(): End-Of-File Encountered\n"); */ retval = rfbSendFileTransferMessage(cl, rfbEndOfFile, 0, 0, 0, NULL); close(cl->fileTransfer.fd); cl->fileTransfer.fd = -1; cl->fileTransfer.sending = 0; cl->fileTransfer.receiving = 0; return retval; case -1: /* TODO : send an error msg to the client... */ rfbLog("rfbSendFileTransferChunk(): %s\n",strerror(errno)); retval = rfbSendFileTransferMessage(cl, rfbAbortFileTransfer, 0, 0, 0, NULL); close(cl->fileTransfer.fd); cl->fileTransfer.fd = -1; cl->fileTransfer.sending = 0; cl->fileTransfer.receiving = 0; return retval; default: /* rfbLog("rfbSendFileTransferChunk(): Read %d bytes\n", bytesRead); */ if (!cl->fileTransfer.compressionEnabled) return rfbSendFileTransferMessage(cl, rfbFilePacket, 0, 0, bytesRead, (char *)readBuf); else { #ifdef LIBVNCSERVER_HAVE_LIBZ nRetC = compress(compBuf, &nMaxCompSize, readBuf, bytesRead); /* rfbLog("Compressed the packet from %d -> %d bytes\n", nMaxCompSize, bytesRead); */ if ((nRetC==0) && (nMaxCompSizeD:\....Z:\ * * We replace the "\" char following the drive letter and ":" * with a char corresponding to the type of drive * We obtain something like "C:lD:c....Z:n\" * Isn't it ugly ? * DRIVE_FIXED = 'l' (local?) * DRIVE_REMOVABLE = 'f' (floppy?) * DRIVE_CDROM = 'c' * DRIVE_REMOTE = 'n' */ /* in unix, there are no 'drives' (We could list mount points though) * We fake the root as a "C:" for the Winblows users */ filename2[0]='C'; filename2[1]=':'; filename2[2]='l'; filename2[3]=0; filename2[4]=0; retval = rfbSendFileTransferMessage(cl, rfbDirPacket, rfbADrivesList, 0, 5, filename2); if (buffer!=NULL) free(buffer); return retval; break; case rfbRDirContent: /* Client requests the content of a directory */ /* rfbLog("rfbProcessFileTransfer() rfbDirContentRequest: rfbRDirContent\n"); */ if ((buffer = rfbProcessFileTransferReadBuffer(cl, length))==NULL) return FALSE; retval = rfbSendDirContent(cl, length, buffer); if (buffer!=NULL) free(buffer); return retval; } break; case rfbDirPacket: rfbLog("rfbProcessFileTransfer() rfbDirPacket\n"); break; case rfbFileAcceptHeader: rfbLog("rfbProcessFileTransfer() rfbFileAcceptHeader\n"); break; case rfbCommandReturn: rfbLog("rfbProcessFileTransfer() rfbCommandReturn\n"); break; case rfbFileChecksums: /* Destination file already exists - the viewer sends the checksums */ rfbLog("rfbProcessFileTransfer() rfbFileChecksums\n"); break; case rfbFileTransferAccess: rfbLog("rfbProcessFileTransfer() rfbFileTransferAccess\n"); break; /* * sending from the server to the viewer */ case rfbFileTransferRequest: /* rfbLog("rfbProcessFileTransfer() rfbFileTransferRequest:\n"); */ /* add some space to the end of the buffer as we will be adding a timespec to it */ if ((buffer = rfbProcessFileTransferReadBuffer(cl, length))==NULL) return FALSE; /* The client requests a File */ rfbFilenameTranslate2UNIX(cl, buffer, filename1); cl->fileTransfer.fd=open(filename1, O_RDONLY, 0744); /* rfbLog("rfbProcessFileTransfer() rfbFileTransferRequest(\"%s\"->\"%s\") Open: %s\n", buffer, filename1, (cl->fileTransfer.fd==-1?"Failed":"Success")); */ if (cl->fileTransfer.fd!=-1) { if (fstat(cl->fileTransfer.fd, &statbuf)!=0) { close(cl->fileTransfer.fd); cl->fileTransfer.fd=-1; } else { /* Add the File Time Stamp to the filename */ strftime(timespec, sizeof(timespec), "%m/%d/%Y %H:%M",gmtime(&statbuf.st_ctime)); buffer=realloc(buffer, length + strlen(timespec) + 2); /* comma, and Null term */ if (buffer==NULL) { rfbLog("rfbProcessFileTransfer() rfbFileTransferRequest: Failed to malloc %d bytes\n", length + strlen(timespec) + 2); return FALSE; } strcat(buffer,","); strcat(buffer, timespec); length = strlen(buffer); } } /* The viewer supports compression if size==1 */ cl->fileTransfer.compressionEnabled = (size==1); /* rfbLog("rfbProcessFileTransfer() rfbFileTransferRequest(\"%s\"->\"%s\")%s\n", buffer, filename1, (size==1?" ":"")); */ /* File Size in bytes, 0xFFFFFFFF (-1) means error */ retval = rfbSendFileTransferMessage(cl, rfbFileHeader, 0, (cl->fileTransfer.fd==-1 ? -1 : statbuf.st_size), length, buffer); if (cl->fileTransfer.fd==-1) { if (buffer!=NULL) free(buffer); return retval; } /* setup filetransfer stuff */ cl->fileTransfer.fileSize = statbuf.st_size; cl->fileTransfer.numPackets = statbuf.st_size / sz_rfbBlockSize; cl->fileTransfer.receiving = 0; cl->fileTransfer.sending = 0; /* set when we receive a rfbFileHeader: */ /* TODO: finish 64-bit file size support */ sizeHtmp = 0; if (rfbWriteExact(cl, (char *)&sizeHtmp, 4) < 0) { rfbLogPerror("rfbProcessFileTransfer: write"); rfbCloseClient(cl); if (buffer!=NULL) free(buffer); return FALSE; } break; case rfbFileHeader: /* Destination file (viewer side) is ready for reception (size > 0) or not (size = -1) */ if (size==-1) { rfbLog("rfbProcessFileTransfer() rfbFileHeader (error, aborting)\n"); close(cl->fileTransfer.fd); cl->fileTransfer.fd=-1; return TRUE; } /* rfbLog("rfbProcessFileTransfer() rfbFileHeader (%d bytes of a file)\n", size); */ /* Starts the transfer! */ cl->fileTransfer.sending=1; return rfbSendFileTransferChunk(cl); break; /* * sending from the viewer to the server */ case rfbFileTransferOffer: /* client is sending a file to us */ /* buffer contains full path name (plus FileTime) */ /* size contains size of the file */ /* rfbLog("rfbProcessFileTransfer() rfbFileTransferOffer:\n"); */ if ((buffer = rfbProcessFileTransferReadBuffer(cl, length))==NULL) return FALSE; /* Parse the FileTime */ p = strrchr(buffer, ','); if (p!=NULL) { *p = '\0'; strcpy(szFileTime, p+1); } else szFileTime[0]=0; /* Need to read in sizeHtmp */ if ((n = rfbReadExact(cl, (char *)&sizeHtmp, 4)) <= 0) { if (n != 0) rfbLogPerror("rfbProcessFileTransfer: read sizeHtmp"); rfbCloseClient(cl); /* NOTE: don't forget to free(buffer) if you return early! */ if (buffer!=NULL) free(buffer); return FALSE; } sizeHtmp = Swap32IfLE(sizeHtmp); rfbFilenameTranslate2UNIX(cl, buffer, filename1); /* If the file exists... We can send a rfbFileChecksums back to the client before we send an rfbFileAcceptHeader */ /* TODO: Delta Transfer */ cl->fileTransfer.fd=open(filename1, O_CREAT|O_WRONLY|O_TRUNC, 0744); /* rfbLog("rfbProcessFileTransfer() rfbFileTransferOffer(\"%s\"->\"%s\") %s %s\n", buffer, filename1, (cl->fileTransfer.fd==-1?"Failed":"Success"), (cl->fileTransfer.fd==-1?strerror(errno):"")); */ /* File Size in bytes, 0xFFFFFFFF (-1) means error */ retval = rfbSendFileTransferMessage(cl, rfbFileAcceptHeader, 0, (cl->fileTransfer.fd==-1 ? -1 : 0), length, buffer); if (cl->fileTransfer.fd==-1) { free(buffer); return retval; } /* setup filetransfer stuff */ cl->fileTransfer.fileSize = size; cl->fileTransfer.numPackets = size / sz_rfbBlockSize; cl->fileTransfer.receiving = 1; cl->fileTransfer.sending = 0; break; case rfbFilePacket: /* rfbLog("rfbProcessFileTransfer() rfbFilePacket:\n"); */ if ((buffer = rfbProcessFileTransferReadBuffer(cl, length))==NULL) return FALSE; if (cl->fileTransfer.fd!=-1) { /* buffer contains the contents of the file */ if (size==0) retval=write(cl->fileTransfer.fd, buffer, length); else { #ifdef LIBVNCSERVER_HAVE_LIBZ /* compressed packet */ nRet = uncompress(compBuff,&nRawBytes,(const unsigned char*)buffer, length); retval=write(cl->fileTransfer.fd, compBuff, nRawBytes); #else /* Write the file out as received... */ retval=write(cl->fileTransfer.fd, buffer, length); #endif } if (retval==-1) { close(cl->fileTransfer.fd); cl->fileTransfer.fd=-1; cl->fileTransfer.sending = 0; cl->fileTransfer.receiving = 0; } } break; case rfbEndOfFile: /* rfbLog("rfbProcessFileTransfer() rfbEndOfFile\n"); */ if (cl->fileTransfer.fd!=-1) close(cl->fileTransfer.fd); cl->fileTransfer.fd=-1; cl->fileTransfer.sending = 0; cl->fileTransfer.receiving = 0; break; case rfbAbortFileTransfer: /* rfbLog("rfbProcessFileTransfer() rfbAbortFileTransfer\n"); */ if (cl->fileTransfer.fd!=-1) { close(cl->fileTransfer.fd); cl->fileTransfer.fd=-1; cl->fileTransfer.sending = 0; cl->fileTransfer.receiving = 0; } else { /* We use this message for FileTransfer rights (<=RC18 versions) * The client asks for FileTransfer permission */ if (contentParam == 0) { rfbLog("rfbProcessFileTransfer() File Transfer Permission DENIED! (Client Version <=RC18)\n"); /* Old method for FileTransfer handshake perimssion (<=RC18) (Deny it)*/ return rfbSendFileTransferMessage(cl, rfbAbortFileTransfer, 0, -1, 0, ""); } /* New method is allowed */ if (cl->screen->getFileTransferPermission!=NULL) { if (cl->screen->getFileTransferPermission(cl)==TRUE) { rfbLog("rfbProcessFileTransfer() File Transfer Permission Granted!\n"); return rfbSendFileTransferMessage(cl, rfbFileTransferAccess, 0, 1 , 0, ""); /* Permit */ } else { rfbLog("rfbProcessFileTransfer() File Transfer Permission DENIED!\n"); return rfbSendFileTransferMessage(cl, rfbFileTransferAccess, 0, -1 , 0, ""); /* Deny */ } } else { if (cl->screen->permitFileTransfer) { rfbLog("rfbProcessFileTransfer() File Transfer Permission Granted!\n"); return rfbSendFileTransferMessage(cl, rfbFileTransferAccess, 0, 1 , 0, ""); /* Permit */ } else { rfbLog("rfbProcessFileTransfer() File Transfer Permission DENIED by default!\n"); return rfbSendFileTransferMessage(cl, rfbFileTransferAccess, 0, -1 , 0, ""); /* DEFAULT: DENY (for security) */ } } } break; case rfbCommand: /* rfbLog("rfbProcessFileTransfer() rfbCommand:\n"); */ if ((buffer = rfbProcessFileTransferReadBuffer(cl, length))==NULL) return FALSE; switch (contentParam) { case rfbCDirCreate: /* Client requests the creation of a directory */ rfbFilenameTranslate2UNIX(cl, buffer, filename1); retval = mkdir(filename1, 0755); /* rfbLog("rfbProcessFileTransfer() rfbCommand: rfbCDirCreate(\"%s\"->\"%s\") %s\n", buffer, filename1, (retval==-1?"Failed":"Success")); */ retval = rfbSendFileTransferMessage(cl, rfbCommandReturn, rfbADirCreate, retval, length, buffer); if (buffer!=NULL) free(buffer); return retval; case rfbCFileDelete: /* Client requests the deletion of a file */ rfbFilenameTranslate2UNIX(cl, buffer, filename1); if (stat(filename1,&statbuf)==0) { if (S_ISDIR(statbuf.st_mode)) retval = rmdir(filename1); else retval = unlink(filename1); } else retval=-1; retval = rfbSendFileTransferMessage(cl, rfbCommandReturn, rfbAFileDelete, retval, length, buffer); if (buffer!=NULL) free(buffer); return retval; case rfbCFileRename: /* Client requests the Renaming of a file/directory */ p = strrchr(buffer, '*'); if (p != NULL) { /* Split into 2 filenames ('*' is a seperator) */ *p = '\0'; rfbFilenameTranslate2UNIX(cl, buffer, filename1); rfbFilenameTranslate2UNIX(cl, p+1, filename2); retval = rename(filename1,filename2); /* rfbLog("rfbProcessFileTransfer() rfbCommand: rfbCFileRename(\"%s\"->\"%s\" -->> \"%s\"->\"%s\") %s\n", buffer, filename1, p+1, filename2, (retval==-1?"Failed":"Success")); */ /* Restore the buffer so the reply is good */ *p = '*'; retval = rfbSendFileTransferMessage(cl, rfbCommandReturn, rfbAFileRename, retval, length, buffer); if (buffer!=NULL) free(buffer); return retval; } break; } break; } /* NOTE: don't forget to free(buffer) if you return early! */ if (buffer!=NULL) free(buffer); return TRUE; } /* * rfbProcessClientNormalMessage is called when the client has sent a normal * protocol message. */ static void rfbProcessClientNormalMessage(rfbClientPtr cl) { int n=0; rfbClientToServerMsg msg; char *str; int i; uint32_t enc=0; uint32_t lastPreferredEncoding = -1; char encBuf[64]; char encBuf2[64]; if ((n = rfbReadExact(cl, (char *)&msg, 1)) <= 0) { if (n != 0) rfbLogPerror("rfbProcessClientNormalMessage: read"); rfbCloseClient(cl); return; } switch (msg.type) { case rfbSetPixelFormat: if ((n = rfbReadExact(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); rfbStatRecordMessageRcvd(cl, msg.type, sz_rfbSetPixelFormatMsg, sz_rfbSetPixelFormatMsg); return; case rfbFixColourMapEntries: if ((n = rfbReadExact(cl, ((char *)&msg) + 1, sz_rfbFixColourMapEntriesMsg - 1)) <= 0) { if (n != 0) rfbLogPerror("rfbProcessClientNormalMessage: read"); rfbCloseClient(cl); return; } rfbStatRecordMessageRcvd(cl, msg.type, sz_rfbSetPixelFormatMsg, sz_rfbSetPixelFormatMsg); rfbLog("rfbProcessClientNormalMessage: %s", "FixColourMapEntries unsupported\n"); rfbCloseClient(cl); return; /* NOTE: Some clients send us a set of encodings (ie: PointerPos) designed to enable/disable features... * We may want to look into this... * Example: * case rfbEncodingXCursor: * cl->enableCursorShapeUpdates = TRUE; * * Currently: cl->enableCursorShapeUpdates can *never* be turned off... */ case rfbSetEncodings: { if ((n = rfbReadExact(cl, ((char *)&msg) + 1, sz_rfbSetEncodingsMsg - 1)) <= 0) { if (n != 0) rfbLogPerror("rfbProcessClientNormalMessage: read"); rfbCloseClient(cl); return; } msg.se.nEncodings = Swap16IfLE(msg.se.nEncodings); rfbStatRecordMessageRcvd(cl, msg.type, sz_rfbSetEncodingsMsg+(msg.se.nEncodings*4),sz_rfbSetEncodingsMsg+(msg.se.nEncodings*4)); /* * UltraVNC Client has the ability to adapt to changing network environments * So, let's give it a change to tell us what it wants now! */ if (cl->preferredEncoding!=-1) lastPreferredEncoding = cl->preferredEncoding; /* Reset all flags to defaults (allows us to switch between PointerPos and Server Drawn Cursors) */ cl->preferredEncoding=-1; cl->useCopyRect = FALSE; cl->useNewFBSize = FALSE; cl->cursorWasChanged = FALSE; cl->useRichCursorEncoding = FALSE; cl->enableCursorPosUpdates = FALSE; cl->enableCursorShapeUpdates = FALSE; cl->enableCursorShapeUpdates = FALSE; cl->enableLastRectEncoding = FALSE; cl->enableKeyboardLedState = FALSE; cl->enableSupportedMessages = FALSE; cl->enableSupportedEncodings = FALSE; cl->enableServerIdentity = FALSE; for (i = 0; i < msg.se.nEncodings; i++) { if ((n = rfbReadExact(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: case rfbEncodingRRE: case rfbEncodingCoRRE: case rfbEncodingHextile: case rfbEncodingUltra: #ifdef LIBVNCSERVER_HAVE_LIBZ case rfbEncodingZlib: case rfbEncodingZRLE: #ifdef LIBVNCSERVER_HAVE_LIBJPEG case rfbEncodingTight: #endif #endif /* The first supported encoding is the 'preferred' encoding */ if (cl->preferredEncoding == -1) cl->preferredEncoding = enc; break; case rfbEncodingXCursor: if(!cl->screen->dontConvertRichCursorToXCursor) { rfbLog("Enabling X-style cursor updates for client %s\n", cl->host); /* if cursor was drawn, hide the cursor */ if(!cl->enableCursorShapeUpdates) rfbRedrawAfterHideCursor(cl,NULL); cl->enableCursorShapeUpdates = TRUE; cl->cursorWasChanged = TRUE; } break; case rfbEncodingRichCursor: rfbLog("Enabling full-color cursor updates for client %s\n", cl->host); /* if cursor was drawn, hide the cursor */ if(!cl->enableCursorShapeUpdates) rfbRedrawAfterHideCursor(cl,NULL); 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; case rfbEncodingKeyboardLedState: if (!cl->enableKeyboardLedState) { rfbLog("Enabling KeyboardLedState protocol extension for client " "%s\n", cl->host); cl->enableKeyboardLedState = TRUE; } break; case rfbEncodingSupportedMessages: if (!cl->enableSupportedMessages) { rfbLog("Enabling SupportedMessages protocol extension for client " "%s\n", cl->host); cl->enableSupportedMessages = TRUE; } break; case rfbEncodingSupportedEncodings: if (!cl->enableSupportedEncodings) { rfbLog("Enabling SupportedEncodings protocol extension for client " "%s\n", cl->host); cl->enableSupportedEncodings = TRUE; } break; case rfbEncodingServerIdentity: if (!cl->enableServerIdentity) { rfbLog("Enabling ServerIdentity protocol extension for client " "%s\n", cl->host); cl->enableServerIdentity = TRUE; } break; 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 { rfbExtensionData* e; for(e = cl->extensions; e;) { rfbExtensionData* next = e->next; if(e->extension->enablePseudoEncoding && e->extension->enablePseudoEncoding(cl, &e->data, (int)enc)) /* ext handles this encoding */ break; e = next; } if(e == NULL) { rfbBool handled = FALSE; /* if the pseudo encoding is not handled by the enabled extensions, search through all extensions. */ rfbProtocolExtension* e; for(e = rfbGetExtensionIterator(); e;) { int* encs = e->pseudoEncodings; while(encs && *encs!=0) { if(*encs==(int)enc) { void* data = NULL; if(!e->enablePseudoEncoding(cl, &data, (int)enc)) { rfbLog("Installed extension pretends to handle pseudo encoding 0x%x, but does not!\n",(int)enc); } else { rfbEnableExtension(cl, e, data); handled = TRUE; e = NULL; break; } } encs++; } if(e) e = e->next; } rfbReleaseExtensionIterator(); if(!handled) rfbLog("rfbProcessClientNormalMessage: " "ignoring unsupported encoding type %s\n", encodingName(enc,encBuf,sizeof(encBuf))); } } } } if (cl->preferredEncoding == -1) { if (lastPreferredEncoding==-1) { cl->preferredEncoding = rfbEncodingRaw; rfbLog("Defaulting to %s encoding for client %s\n", encodingName(cl->preferredEncoding,encBuf,sizeof(encBuf)),cl->host); } else { cl->preferredEncoding = lastPreferredEncoding; rfbLog("Sticking with %s encoding for client %s\n", encodingName(cl->preferredEncoding,encBuf,sizeof(encBuf)),cl->host); } } else { if (lastPreferredEncoding==-1) { rfbLog("Using %s encoding for client %s\n", encodingName(cl->preferredEncoding,encBuf,sizeof(encBuf)),cl->host); } else { rfbLog("Switching from %s to %s Encoding for client %s\n", encodingName(lastPreferredEncoding,encBuf2,sizeof(encBuf2)), encodingName(cl->preferredEncoding,encBuf,sizeof(encBuf)), cl->host); } } 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 = rfbReadExact(cl, ((char *)&msg) + 1, sz_rfbFramebufferUpdateRequestMsg-1)) <= 0) { if (n != 0) rfbLogPerror("rfbProcessClientNormalMessage: read"); rfbCloseClient(cl); return; } rfbStatRecordMessageRcvd(cl, msg.type, sz_rfbFramebufferUpdateRequestMsg,sz_rfbFramebufferUpdateRequestMsg); /* The values come in based on the scaled screen, we need to convert them to * values based on the main screen's coordinate system */ if(!rectSwapIfLEAndClip(&msg.fur.x,&msg.fur.y,&msg.fur.w,&msg.fur.h,cl)) { rfbLog("Warning, ignoring rfbFramebufferUpdateRequest: %dXx%dY-%dWx%dH\n",msg.fur.x, msg.fur.y, msg.fur.w, msg.fur.h); 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: if ((n = rfbReadExact(cl, ((char *)&msg) + 1, sz_rfbKeyEventMsg - 1)) <= 0) { if (n != 0) rfbLogPerror("rfbProcessClientNormalMessage: read"); rfbCloseClient(cl); return; } rfbStatRecordMessageRcvd(cl, msg.type, sz_rfbKeyEventMsg, sz_rfbKeyEventMsg); if(!cl->viewOnly) { cl->screen->kbdAddEvent(msg.ke.down, (rfbKeySym)Swap32IfLE(msg.ke.key), cl); } return; case rfbPointerEvent: if ((n = rfbReadExact(cl, ((char *)&msg) + 1, sz_rfbPointerEventMsg - 1)) <= 0) { if (n != 0) rfbLogPerror("rfbProcessClientNormalMessage: read"); rfbCloseClient(cl); return; } rfbStatRecordMessageRcvd(cl, msg.type, sz_rfbPointerEventMsg, sz_rfbPointerEventMsg); if (cl->screen->pointerClient && cl->screen->pointerClient != cl) return; if (msg.pe.buttonMask == 0) cl->screen->pointerClient = NULL; else cl->screen->pointerClient = cl; if(!cl->viewOnly) { if (msg.pe.buttonMask != cl->lastPtrButtons || cl->screen->deferPtrUpdateTime == 0) { cl->screen->ptrAddEvent(msg.pe.buttonMask, ScaleX(cl->scaledScreen, cl->screen, Swap16IfLE(msg.pe.x)), ScaleY(cl->scaledScreen, cl->screen, Swap16IfLE(msg.pe.y)), cl); cl->lastPtrButtons = msg.pe.buttonMask; } else { cl->lastPtrX = ScaleX(cl->scaledScreen, cl->screen, Swap16IfLE(msg.pe.x)); cl->lastPtrY = ScaleY(cl->scaledScreen, cl->screen, Swap16IfLE(msg.pe.y)); cl->lastPtrButtons = msg.pe.buttonMask; } } return; case rfbFileTransfer: if ((n = rfbReadExact(cl, ((char *)&msg) + 1, sz_rfbFileTransferMsg - 1)) <= 0) { if (n != 0) rfbLogPerror("rfbProcessClientNormalMessage: read"); rfbCloseClient(cl); return; } msg.ft.size = Swap32IfLE(msg.ft.size); msg.ft.length = Swap32IfLE(msg.ft.length); /* record statistics in rfbProcessFileTransfer as length is filled with garbage when it is not valid */ rfbProcessFileTransfer(cl, msg.ft.contentType, msg.ft.contentParam, msg.ft.size, msg.ft.length); return; case rfbSetSW: if ((n = rfbReadExact(cl, ((char *)&msg) + 1, sz_rfbSetSWMsg - 1)) <= 0) { if (n != 0) rfbLogPerror("rfbProcessClientNormalMessage: read"); rfbCloseClient(cl); return; } msg.sw.x = Swap16IfLE(msg.sw.x); msg.sw.y = Swap16IfLE(msg.sw.y); rfbStatRecordMessageRcvd(cl, msg.type, sz_rfbSetSWMsg, sz_rfbSetSWMsg); /* msg.sw.status is not initialized in the ultraVNC viewer and contains random numbers (why???) */ rfbLog("Received a rfbSetSingleWindow(%d x, %d y)\n", msg.sw.x, msg.sw.y); if (cl->screen->setSingleWindow!=NULL) cl->screen->setSingleWindow(cl, msg.sw.x, msg.sw.y); return; case rfbSetServerInput: if ((n = rfbReadExact(cl, ((char *)&msg) + 1, sz_rfbSetServerInputMsg - 1)) <= 0) { if (n != 0) rfbLogPerror("rfbProcessClientNormalMessage: read"); rfbCloseClient(cl); return; } rfbStatRecordMessageRcvd(cl, msg.type, sz_rfbSetServerInputMsg, sz_rfbSetServerInputMsg); /* msg.sim.pad is not initialized in the ultraVNC viewer and contains random numbers (why???) */ /* msg.sim.pad = Swap16IfLE(msg.sim.pad); */ rfbLog("Received a rfbSetServerInput(%d status)\n", msg.sim.status); if (cl->screen->setServerInput!=NULL) cl->screen->setServerInput(cl, msg.sim.status); return; case rfbTextChat: if ((n = rfbReadExact(cl, ((char *)&msg) + 1, sz_rfbTextChatMsg - 1)) <= 0) { if (n != 0) rfbLogPerror("rfbProcessClientNormalMessage: read"); rfbCloseClient(cl); return; } msg.tc.pad2 = Swap16IfLE(msg.tc.pad2); msg.tc.length = Swap32IfLE(msg.tc.length); switch (msg.tc.length) { case rfbTextChatOpen: case rfbTextChatClose: case rfbTextChatFinished: /* commands do not have text following */ /* Why couldn't they have used the pad byte??? */ str=NULL; rfbStatRecordMessageRcvd(cl, msg.type, sz_rfbTextChatMsg, sz_rfbTextChatMsg); break; default: if ((msg.tc.length>0) && (msg.tc.length%d\n", msg.tc.length, rfbTextMaxSize); rfbCloseClient(cl); return; } } /* Note: length can be commands: rfbTextChatOpen, rfbTextChatClose, and rfbTextChatFinished * at which point, the str is NULL (as it is not sent) */ if (cl->screen->setTextChat!=NULL) cl->screen->setTextChat(cl, msg.tc.length, str); free(str); return; case rfbClientCutText: if ((n = rfbReadExact(cl, ((char *)&msg) + 1, sz_rfbClientCutTextMsg - 1)) <= 0) { if (n != 0) rfbLogPerror("rfbProcessClientNormalMessage: read"); rfbCloseClient(cl); return; } msg.cct.length = Swap32IfLE(msg.cct.length); str = (char *)malloc(msg.cct.length); if ((n = rfbReadExact(cl, str, msg.cct.length)) <= 0) { if (n != 0) rfbLogPerror("rfbProcessClientNormalMessage: read"); free(str); rfbCloseClient(cl); return; } rfbStatRecordMessageRcvd(cl, msg.type, sz_rfbClientCutTextMsg+msg.cct.length, sz_rfbClientCutTextMsg+msg.cct.length); if(!cl->viewOnly) { cl->screen->setXCutText(str, msg.cct.length, cl); } free(str); return; case rfbPalmVNCSetScaleFactor: cl->PalmVNC = TRUE; if ((n = rfbReadExact(cl, ((char *)&msg) + 1, sz_rfbSetScaleMsg - 1)) <= 0) { if (n != 0) rfbLogPerror("rfbProcessClientNormalMessage: read"); rfbCloseClient(cl); return; } rfbStatRecordMessageRcvd(cl, msg.type, sz_rfbSetScaleMsg, sz_rfbSetScaleMsg); rfbLog("rfbSetScale(%d)\n", msg.ssc.scale); rfbScalingSetup(cl,cl->screen->width/msg.ssc.scale, cl->screen->height/msg.ssc.scale); rfbSendNewScaleSize(cl); return; case rfbSetScale: if ((n = rfbReadExact(cl, ((char *)&msg) + 1, sz_rfbSetScaleMsg - 1)) <= 0) { if (n != 0) rfbLogPerror("rfbProcessClientNormalMessage: read"); rfbCloseClient(cl); return; } rfbStatRecordMessageRcvd(cl, msg.type, sz_rfbSetScaleMsg, sz_rfbSetScaleMsg); rfbLog("rfbSetScale(%d)\n", msg.ssc.scale); rfbScalingSetup(cl,cl->screen->width/msg.ssc.scale, cl->screen->height/msg.ssc.scale); rfbSendNewScaleSize(cl); return; default: { rfbExtensionData *e,*next; for(e=cl->extensions; e;) { next = e->next; if(e->extension->handleMessage && e->extension->handleMessage(cl, e->data, &msg)) { rfbStatRecordMessageRcvd(cl, msg.type, 0, 0); /* Extension should handle this */ return; } e = next; } 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(rfbClientPtr cl, sraRegionPtr givenUpdateRegion) { sraRectangleIterator* i=NULL; sraRect rect; int nUpdateRegionRects; rfbFramebufferUpdateMsg *fu = (rfbFramebufferUpdateMsg *)cl->updateBuf; sraRegionPtr updateRegion,updateCopyRegion,tmpRegion; int dx, dy; rfbBool sendCursorShape = FALSE; rfbBool sendCursorPos = FALSE; rfbBool sendKeyboardLedState = FALSE; rfbBool sendSupportedMessages = FALSE; rfbBool sendSupportedEncodings = FALSE; rfbBool sendServerIdentity = FALSE; rfbBool result = TRUE; 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); fu->type = rfbFramebufferUpdate; fu->nRects = Swap16IfLE(1); cl->ublen = sz_rfbFramebufferUpdateMsg; if (!rfbSendNewFBSize(cl, cl->scaledScreen->width, cl->scaledScreen->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->cursorWasChanged && cl->readyForSetColourMapEntries) sendCursorShape = TRUE; } /* * Do we plan to send cursor position update? */ if (cl->enableCursorPosUpdates && cl->cursorWasMoved) sendCursorPos = TRUE; /* * Do we plan to send a keyboard state update? */ if ((cl->enableKeyboardLedState) && (cl->screen->getKeyboardLedStateHook!=NULL)) { int x; x=cl->screen->getKeyboardLedStateHook(cl->screen); if (x!=cl->lastKeyboardLedState) { sendKeyboardLedState = TRUE; cl->lastKeyboardLedState=x; } } /* * Do we plan to send a rfbEncodingSupportedMessages? */ if (cl->enableSupportedMessages) { sendSupportedMessages = TRUE; /* We only send this message ONCE * (We disable it here) */ cl->enableSupportedMessages = FALSE; } /* * Do we plan to send a rfbEncodingSupportedEncodings? */ if (cl->enableSupportedEncodings) { sendSupportedEncodings = TRUE; /* We only send this message ONCE * (We disable it here) */ cl->enableSupportedEncodings = FALSE; } /* * Do we plan to send a rfbEncodingServerIdentity? */ if (cl->enableServerIdentity) { sendServerIdentity = TRUE; /* We only send this message ONCE * (We disable it here) */ cl->enableServerIdentity = FALSE; } 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.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) && sraRgnEmpty(updateRegion) && (cl->enableCursorShapeUpdates || (cl->cursorX == cl->screen->cursorX && cl->cursorY == cl->screen->cursorY)) && !sendCursorShape && !sendCursorPos && !sendKeyboardLedState && !sendSupportedMessages && !sendSupportedEncodings && !sendServerIdentity) { 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); if (!cl->enableCursorShapeUpdates) { if(cl->cursorX != cl->screen->cursorX || cl->cursorY != cl->screen->cursorY) { rfbRedrawAfterHideCursor(cl,updateRegion); LOCK(cl->screen->cursorMutex); cl->cursorX = cl->screen->cursorX; cl->cursorY = cl->screen->cursorY; UNLOCK(cl->screen->cursorMutex); rfbRedrawAfterHideCursor(cl,updateRegion); } rfbShowCursor(cl); } /* * Now send the update. */ rfbStatRecordMessageSent(cl, rfbFramebufferUpdate, 0, 0); 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; int rectsPerRow, rows; /* We need to count the number of rects in the scaled screen */ if (cl->screen!=cl->scaledScreen) rfbScaledCorrection(cl->screen, cl->scaledScreen, &x, &y, &w, &h, "rfbSendFramebufferUpdate"); rectsPerRow = (w-1)/cl->correMaxWidth+1; rows = (h-1)/cl->correMaxHeight+1; nUpdateRegionRects += rectsPerRow*rows; } sraRgnReleaseIterator(i); } else if (cl->preferredEncoding == rfbEncodingUltra) { 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; /* We need to count the number of rects in the scaled screen */ if (cl->screen!=cl->scaledScreen) rfbScaledCorrection(cl->screen, cl->scaledScreen, &x, &y, &w, &h, "rfbSendFramebufferUpdate"); nUpdateRegionRects += (((h-1) / (ULTRA_MAX_SIZE( w ) / w)) + 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; /* We need to count the number of rects in the scaled screen */ if (cl->screen!=cl->scaledScreen) rfbScaledCorrection(cl->screen, cl->scaledScreen, &x, &y, &w, &h, "rfbSendFramebufferUpdate"); 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; /* We need to count the number of rects in the scaled screen */ if (cl->screen!=cl->scaledScreen) rfbScaledCorrection(cl->screen, cl->scaledScreen, &x, &y, &w, &h, "rfbSendFramebufferUpdate"); 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 /* CoRRE splits the screen into smaller squares */ && cl->preferredEncoding != rfbEncodingCoRRE /* Ultra encoding splits rectangles up into smaller chunks */ && cl->preferredEncoding != rfbEncodingUltra #ifdef LIBVNCSERVER_HAVE_LIBZ /* Zlib encoding splits rectangles up into smaller chunks */ && cl->preferredEncoding != rfbEncodingZlib #ifdef LIBVNCSERVER_HAVE_LIBJPEG /* Tight encoding counts the rectangles differently */ && cl->preferredEncoding != rfbEncodingTight #endif #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 + !!sendKeyboardLedState + !!sendSupportedMessages + !!sendSupportedEncodings + !!sendServerIdentity)); } else { fu->nRects = 0xFFFF; } cl->ublen = sz_rfbFramebufferUpdateMsg; if (sendCursorShape) { cl->cursorWasChanged = FALSE; if (!rfbSendCursorShape(cl)) goto updateFailed; } if (sendCursorPos) { cl->cursorWasMoved = FALSE; if (!rfbSendCursorPos(cl)) goto updateFailed; } if (sendKeyboardLedState) { if (!rfbSendKeyboardLedState(cl)) goto updateFailed; } if (sendSupportedMessages) { if (!rfbSendSupportedMessages(cl)) goto updateFailed; } if (sendSupportedEncodings) { if (!rfbSendSupportedEncodings(cl)) goto updateFailed; } if (sendServerIdentity) { if (!rfbSendServerIdentity(cl)) goto updateFailed; } if (!sraRgnEmpty(updateCopyRegion)) { if (!rfbSendCopyRegion(cl,updateCopyRegion,dx,dy)) goto updateFailed; } 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; /* We need to count the number of rects in the scaled screen */ if (cl->screen!=cl->scaledScreen) rfbScaledCorrection(cl->screen, cl->scaledScreen, &x, &y, &w, &h, "rfbSendFramebufferUpdate"); switch (cl->preferredEncoding) { case -1: case rfbEncodingRaw: if (!rfbSendRectEncodingRaw(cl, x, y, w, h)) goto updateFailed; break; case rfbEncodingRRE: if (!rfbSendRectEncodingRRE(cl, x, y, w, h)) goto updateFailed; break; case rfbEncodingCoRRE: if (!rfbSendRectEncodingCoRRE(cl, x, y, w, h)) goto updateFailed; break; case rfbEncodingHextile: if (!rfbSendRectEncodingHextile(cl, x, y, w, h)) goto updateFailed; break; case rfbEncodingUltra: if (!rfbSendRectEncodingUltra(cl, x, y, w, h)) goto updateFailed; break; #ifdef LIBVNCSERVER_HAVE_LIBZ case rfbEncodingZlib: if (!rfbSendRectEncodingZlib(cl, x, y, w, h)) goto updateFailed; break; #ifdef LIBVNCSERVER_HAVE_LIBJPEG case rfbEncodingTight: if (!rfbSendRectEncodingTight(cl, x, y, w, h)) goto updateFailed; break; #endif #endif #ifdef LIBVNCSERVER_HAVE_LIBZ case rfbEncodingZRLE: if (!rfbSendRectEncodingZRLE(cl, x, y, w, h)) goto updateFailed; break; #endif } } if ( nUpdateRegionRects == 0xFFFF && !rfbSendLastRectMarker(cl) ) goto updateFailed; if (!rfbSendUpdateBuf(cl)) { updateFailed: result = FALSE; } if (!cl->enableCursorShapeUpdates) { rfbHideCursor(cl); } if(i) sraRgnReleaseIterator(i); sraRgnDestroy(updateRegion); sraRgnDestroy(updateCopyRegion); return result; } /* * 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(rfbClientPtr cl, sraRegionPtr reg, int dx, int 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); /* correct for the scale of the screen */ dx = ScaleX(cl->screen, cl->scaledScreen, dx); dy = ScaleX(cl->screen, cl->scaledScreen, dy); while(sraRgnIteratorNext(i,&rect1)) { x = rect1.x1; y = rect1.y1; w = rect1.x2 - x; h = rect1.y2 - y; /* correct for scaling (if necessary) */ rfbScaledCorrection(cl->screen, cl->scaledScreen, &x, &y, &w, &h, "copyrect"); 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; rfbStatRecordEncodingSent(cl, rfbEncodingCopyRect, sz_rfbFramebufferUpdateRectHeader + sz_rfbCopyRect, w * h * (cl->scaledScreen->bitsPerPixel / 8)); } sraRgnReleaseIterator(i); return TRUE; } /* * Send a given rectangle in raw encoding (rfbEncodingRaw). */ rfbBool rfbSendRectEncodingRaw(rfbClientPtr cl, int x, int y, int w, int h) { rfbFramebufferUpdateRectHeader rect; int nlines; int bytesPerLine = w * (cl->format.bitsPerPixel / 8); char *fbptr = (cl->scaledScreen->frameBuffer + (cl->scaledScreen->paddedWidthInBytes * y) + (x * (cl->scaledScreen->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; rfbStatRecordEncodingSent(cl, rfbEncodingRaw, sz_rfbFramebufferUpdateRectHeader + bytesPerLine * h, sz_rfbFramebufferUpdateRectHeader + bytesPerLine * h); nlines = (UPDATE_BUF_SIZE - cl->ublen) / bytesPerLine; while (TRUE) { if (nlines > h) nlines = h; (*cl->translateFn)(cl->translateLookupTable, &(cl->screen->serverFormat), &cl->format, fbptr, &cl->updateBuf[cl->ublen], cl->scaledScreen->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->scaledScreen->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(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; rfbStatRecordEncodingSent(cl, rfbEncodingLastRect, sz_rfbFramebufferUpdateRectHeader, sz_rfbFramebufferUpdateRectHeader); return TRUE; } /* * Send NewFBSize pseudo-rectangle. This tells the client to change * its framebuffer size. */ rfbBool rfbSendNewFBSize(rfbClientPtr cl, int w, int h) { rfbFramebufferUpdateRectHeader rect; if (cl->ublen + sz_rfbFramebufferUpdateRectHeader > UPDATE_BUF_SIZE) { if (!rfbSendUpdateBuf(cl)) return FALSE; } if (cl->PalmVNC==TRUE) rfbLog("Sending a rfbEncodingNewFBSize in response to a PalmVNC style frameuffer resize request (%dx%d)\n", w, h); else rfbLog("Sending a rfbEncodingNewFBSize in response to a UltraVNC style frameuffer resize request (%dx%d)\n", w, h); 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; rfbStatRecordEncodingSent(cl, rfbEncodingNewFBSize, sz_rfbFramebufferUpdateRectHeader, sz_rfbFramebufferUpdateRectHeader); return TRUE; } /* * Send the contents of cl->updateBuf. Returns 1 if successful, -1 if * not (errno should be set). */ rfbBool rfbSendUpdateBuf(rfbClientPtr cl) { if(cl->sock<0) return FALSE; if (rfbWriteExact(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(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 (rfbWriteExact(cl, buf, len) < 0) { rfbLogPerror("rfbSendSetColourMapEntries: write"); rfbCloseClient(cl); return FALSE; } rfbStatRecordMessageSent(cl, rfbSetColourMapEntries, len, len); 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 (rfbWriteExact(cl, (char *)&b, sz_rfbBellMsg) < 0) { rfbLogPerror("rfbSendBell: write"); rfbCloseClient(cl); } } rfbStatRecordMessageSent(cl, rfbBell, sz_rfbBellMsg, sz_rfbBellMsg); 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 (rfbWriteExact(cl, (char *)&sct, sz_rfbServerCutTextMsg) < 0) { rfbLogPerror("rfbSendServerCutText: write"); rfbCloseClient(cl); continue; } if (rfbWriteExact(cl, str, len) < 0) { rfbLogPerror("rfbSendServerCutText: write"); rfbCloseClient(cl); } rfbStatRecordMessageSent(cl, rfbServerCutText, sz_rfbServerCutTextMsg+len, sz_rfbServerCutTextMsg+len); } 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!). */ static unsigned char ptrAcceleration = 50; void rfbNewUDPConnection(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); } }