/
rfbserver.c
3117 lines (2636 loc) · 103 KB
/
rfbserver.c
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/*
* rfbserver.c - deal with server-side of the RFB protocol.
*/
/* Copyright (C) 2009-2022 D. R. Commander. All Rights Reserved.
* Copyright (C) 2015-2017, 2020-2021 Pierre Ossman for Cendio AB.
* All Rights Reserved.
* Copyright (C) 2021 AnatoScope SA. All Rights Reserved.
* Copyright (C) 2011 Joel Martin
* Copyright (C) 2010 University Corporation for Atmospheric Research.
* All Rights Reserved.
* Copyright (C) 2005-2008 Sun Microsystems, Inc. All Rights Reserved.
* Copyright (C) 2000-2006 Constantin Kaplinsky. All Rights Reserved.
* Copyright (C) 2004 Landmark Graphics Corporation. All Rights Reserved.
* Copyright (C) 2000 Tridia Corporation. All Rights Reserved.
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pwd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <arpa/inet.h>
#include "windowstr.h"
#include "rfb.h"
#include "sprite.h"
char updateBuf[UPDATE_BUF_SIZE];
int ublen;
rfbClientPtr rfbClientHead = NULL;
/* The client that is currently dragging the pointer
This serves as a mutex for RFB pointer events. */
rfbClientPtr pointerDragClient = NULL;
/* The client that last moved the pointer
Other clients will automatically receive cursor updates via the traditional
mechanism of drawing the cursor into the framebuffer (AKA "server-side
cursor rendering") so they can track the pointer's movement regardless of
whether cursor shape updates (AKA "client-side cursor rendering") are
enabled. */
rfbClientPtr pointerOwner = NULL;
Bool rfbAlwaysShared = FALSE;
Bool rfbNeverShared = FALSE;
Bool rfbDisconnect = FALSE;
Bool rfbViewOnly = FALSE; /* run server in view only mode - Ehud Karni SW */
Bool rfbCongestionControl = TRUE;
double rfbAutoLosslessRefresh = 0.0;
Bool rfbALRAll = FALSE;
int rfbALRQualityLevel = -1;
int rfbALRSubsampLevel = TVNC_1X;
int rfbCombineRect = 100;
int rfbICEBlockSize = 256;
Bool rfbInterframeDebug = FALSE;
Bool rfbGIIDebug = FALSE;
int rfbMaxWidth = MAXSHORT, rfbMaxHeight = MAXSHORT;
int rfbMaxClipboard = MAX_CUTTEXT_LEN;
Bool rfbVirtualTablet = FALSE;
#if !defined(__FreeBSD__) && !defined(__NetBSD__) && !defined(__OpenBSD__) && !defined(__DragonFly__)
Bool rfbMT = TRUE;
#else
/* Multithreaded Tight encoding segfaults on FreeBSD, for unknown reasons. */
Bool rfbMT = FALSE;
#endif
int rfbNumThreads = 0;
static rfbClientPtr rfbNewClient(int sock);
static void rfbProcessClientProtocolVersion(rfbClientPtr cl);
static void rfbProcessClientInitMessage(rfbClientPtr cl);
static void rfbSendInteractionCaps(rfbClientPtr cl);
static void rfbProcessClientNormalMessage(rfbClientPtr cl);
static Bool rfbSendCopyRegion(rfbClientPtr cl, RegionPtr reg, int dx, int dy);
static Bool rfbSendLastRectMarker(rfbClientPtr cl);
Bool rfbSendDesktopSize(rfbClientPtr cl);
Bool rfbSendExtDesktopSize(rfbClientPtr cl);
static Bool rfbSendQEMUExtKeyEventRect(rfbClientPtr cl);
static Bool rfbSendLEDState(rfbClientPtr cl);
/*
* Session capture
*/
char *rfbCaptureFile = NULL;
void rfbWriteCapture(int captureFD, char *buf, int len)
{
if (write(captureFD, buf, len) < len)
rfbLogPerror("rfbWriteCapture: Could not write to capture file");
}
/*
* Idle timeout
*/
CARD32 rfbMaxIdleTimeout = 0;
CARD32 rfbIdleTimeout = 0;
static double idleTimeout = -1.0;
void IdleTimerSet(void)
{
idleTimeout = gettime() + (double)rfbIdleTimeout;
}
static void IdleTimerCancel(void)
{
idleTimeout = -1.0;
}
void IdleTimerCheck(void)
{
if (idleTimeout >= 0.0 && gettime() >= idleTimeout)
FatalError("TurboVNC session has been idle for %u seconds. Exiting.",
(unsigned int)rfbIdleTimeout);
}
/*
* Profiling stuff
*/
BOOL rfbProfile = FALSE;
static double tUpdate = 0., tStart = -1., tElapsed, mpixels = 0.,
idmpixels = 0.;
static unsigned long updates = 0;
unsigned long long sendBytes = 0;
double gettime(void)
{
struct timeval __tv;
gettimeofday(&__tv, (struct timezone *)NULL);
return (double)__tv.tv_sec + (double)__tv.tv_usec * 0.000001;
}
/*
* Auto Lossless Refresh
*/
static Bool alrCopyRect = TRUE;
static CARD32 alrCallback(OsTimerPtr timer, CARD32 time, pointer arg)
{
RegionRec copyRegionSave, modifiedRegionSave, requestedRegionSave,
ifRegionSave;
rfbClientPtr cl = (rfbClientPtr)arg;
int tightCompressLevelSave, tightQualityLevelSave, copyDXSave, copyDYSave,
tightSubsampLevelSave;
RegionRec tmpRegion;
REGION_INIT(pScreen, &tmpRegion, NullBox, 0);
if (!rfbALRAll && !cl->firstUpdate)
REGION_INTERSECT(pScreen, &tmpRegion, &cl->alrRegion, &cl->lossyRegion);
else
REGION_COPY(pScreen, &tmpRegion, &cl->lossyRegion);
if (cl->firstUpdate) cl->firstUpdate = FALSE;
if (REGION_NOTEMPTY(pScreen, &tmpRegion)) {
tightCompressLevelSave = cl->tightCompressLevel;
tightQualityLevelSave = cl->tightQualityLevel;
tightSubsampLevelSave = cl->tightSubsampLevel;
copyDXSave = cl->copyDX;
copyDYSave = cl->copyDY;
REGION_INIT(pScreen, ©RegionSave, NullBox, 0);
REGION_COPY(pScreen, ©RegionSave, &cl->copyRegion);
REGION_INIT(pScreen, &modifiedRegionSave, NullBox, 0);
REGION_COPY(pScreen, &modifiedRegionSave, &cl->modifiedRegion);
REGION_INIT(pScreen, &requestedRegionSave, NullBox, 0);
REGION_COPY(pScreen, &requestedRegionSave, &cl->requestedRegion);
REGION_INIT(pScreen, &ifRegionSave, NullBox, 0);
REGION_COPY(pScreen, &ifRegionSave, &cl->ifRegion);
cl->tightCompressLevel = 1;
cl->tightQualityLevel = rfbALRQualityLevel;
cl->tightSubsampLevel = rfbALRSubsampLevel;
cl->copyDX = cl->copyDY = 0;
REGION_EMPTY(pScreen, &cl->copyRegion);
REGION_EMPTY(pScreen, &cl->modifiedRegion);
REGION_UNION(pScreen, &cl->modifiedRegion, &cl->modifiedRegion,
&tmpRegion);
REGION_EMPTY(pScreen, &cl->requestedRegion);
REGION_UNION(pScreen, &cl->requestedRegion, &cl->requestedRegion,
&tmpRegion);
if (cl->compareFB) {
REGION_EMPTY(pScreen, &cl->ifRegion);
REGION_UNION(pScreen, &cl->ifRegion, &cl->ifRegion, &tmpRegion);
}
cl->inALR = TRUE;
if (!rfbSendFramebufferUpdate(cl)) return 0;
cl->inALR = FALSE;
REGION_EMPTY(pScreen, &cl->lossyRegion);
REGION_EMPTY(pScreen, &cl->alrRegion);
cl->tightCompressLevel = tightCompressLevelSave;
cl->tightQualityLevel = tightQualityLevelSave;
cl->tightSubsampLevel = tightSubsampLevelSave;
cl->copyDX = copyDXSave;
cl->copyDY = copyDYSave;
REGION_COPY(pScreen, &cl->copyRegion, ©RegionSave);
REGION_COPY(pScreen, &cl->modifiedRegion, &modifiedRegionSave);
REGION_COPY(pScreen, &cl->requestedRegion, &requestedRegionSave);
REGION_UNINIT(pScreen, ©RegionSave);
REGION_UNINIT(pScreen, &modifiedRegionSave);
REGION_UNINIT(pScreen, &requestedRegionSave);
if (cl->compareFB) {
REGION_COPY(pScreen, &cl->ifRegion, &ifRegionSave);
REGION_UNINIT(pScreen, &ifRegionSave);
}
}
REGION_UNINIT(pScreen, &tmpRegion);
return 0;
}
/*
* Interframe comparison
*/
int rfbInterframe = -1; /* -1 = auto (determined by compression level) */
Bool InterframeOn(rfbClientPtr cl)
{
if (!cl->compareFB) {
if (!(cl->compareFB =
(char *)malloc(rfbFB.paddedWidthInBytes * rfbFB.height))) {
rfbLogPerror("InterframeOn: couldn't allocate comparison buffer");
return FALSE;
}
memset(cl->compareFB, 0, rfbFB.paddedWidthInBytes * rfbFB.height);
REGION_INIT(pScreen, &cl->ifRegion, NullBox, 0);
cl->firstCompare = TRUE;
rfbLog("Interframe comparison enabled\n");
}
cl->fb = cl->compareFB;
return TRUE;
}
void InterframeOff(rfbClientPtr cl)
{
if (cl->compareFB) {
free(cl->compareFB);
REGION_UNINIT(pScreen, &cl->ifRegion);
rfbLog("Interframe comparison disabled\n");
}
cl->compareFB = NULL;
cl->fb = rfbFB.pfbMemory;
}
/*
* Map of quality levels to provide compatibility with TightVNC/TigerVNC
* clients
*/
static int JPEG_QUAL[10] = {
15, 29, 41, 42, 62, 77, 79, 86, 92, 100
};
static int JPEG_SUBSAMP[10] = {
1, 1, 1, 2, 2, 2, 0, 0, 0, 0
};
/*
* rfbNewClientConnection is called from sockets.c when a new connection
* comes in.
*/
void rfbNewClientConnection(int sock)
{
rfbNewClient(sock);
}
/*
* rfbReverseConnection is called to make an outward connection to a
* "listening" RFB client.
*/
rfbClientPtr rfbReverseConnection(char *host, int port, int id)
{
int sock;
rfbClientPtr cl;
if (rfbAuthDisableRevCon) {
rfbLog("Reverse connections disabled\n");
return (rfbClientPtr)NULL;
}
if ((sock = rfbConnect(host, port)) < 0)
return (rfbClientPtr)NULL;
if (id > 0) {
rfbClientRec clTemp;
char temps[250];
memset(temps, 0, 250);
snprintf(temps, 250, "ID:%d", id);
rfbLog("UltraVNC Repeater Mode II ID is %d\n", id);
clTemp.sock = sock;
if (WriteExact(&clTemp, temps, 250) < 0) {
rfbLogPerror("rfbReverseConnection: write");
rfbCloseSock(sock);
return NULL;
}
}
cl = rfbNewClient(sock);
if (cl)
cl->reverseConnection = TRUE;
return cl;
}
/*
* rfbNewClient is called when a new connection has been made by whatever
* means.
*/
static rfbClientPtr rfbNewClient(int sock)
{
rfbProtocolVersionMsg pv;
rfbClientPtr cl;
BoxRec box;
rfbSockAddr addr;
socklen_t addrlen = sizeof(struct sockaddr_storage);
char addrStr[INET6_ADDRSTRLEN];
char *env = NULL;
int np = sysconf(_SC_NPROCESSORS_CONF);
if (rfbClientHead == NULL)
/* no other clients - make sure we don't think any keys are pressed */
KbdReleaseAllKeys();
cl = (rfbClientPtr)rfbAlloc0(sizeof(rfbClientRec));
if (rfbClientHead == NULL && rfbCaptureFile) {
cl->captureFD = open(rfbCaptureFile, O_CREAT | O_EXCL | O_WRONLY,
S_IRUSR | S_IWUSR);
if (cl->captureFD < 0)
rfbLogPerror("Could not open capture file");
else
rfbLog("Opened capture file %s\n", rfbCaptureFile);
} else
cl->captureFD = -1;
cl->sock = sock;
getpeername(sock, &addr.u.sa, &addrlen);
cl->host = strdup(sockaddr_string(&addr, addrStr, INET6_ADDRSTRLEN));
/* Dispatch client input to rfbProcessClientProtocolVersion(). */
cl->state = RFB_PROTOCOL_VERSION;
cl->preferredEncoding = rfbEncodingTight;
cl->correMaxWidth = 48;
cl->correMaxHeight = 48;
REGION_INIT(pScreen, &cl->copyRegion, NullBox, 0);
box.x1 = box.y1 = 0;
box.x2 = rfbFB.width;
box.y2 = rfbFB.height;
REGION_INIT(pScreen, &cl->modifiedRegion, &box, 0);
REGION_INIT(pScreen, &cl->requestedRegion, NullBox, 0);
cl->deferredUpdateStart = gettime();
cl->format = rfbServerFormat;
cl->translateFn = rfbTranslateNone;
cl->tightCompressLevel = TIGHT_DEFAULT_COMPRESSION;
cl->tightSubsampLevel = TIGHT_DEFAULT_SUBSAMP;
cl->tightQualityLevel = -1;
cl->imageQualityLevel = -1;
cl->ledState = rfbLEDUnknown;
cl->next = rfbClientHead;
cl->prev = NULL;
if (rfbClientHead)
rfbClientHead->prev = cl;
rfbClientHead = cl;
rfbResetStats(cl);
cl->zlibCompressLevel = 5;
xorg_list_init(&cl->pings);
/*
* Wait a few ms for the client to send WebSockets connection
* (TLS/SSL or plain)
*/
if (!webSocketsCheck(cl)) {
/* Error reporting handled in webSocketsHandshake */
rfbCloseClient(cl);
return NULL;
}
sprintf(pv, rfbProtocolVersionFormat, 3, 8);
WRITE_OR_CLOSE(pv, sz_rfbProtocolVersionMsg, return NULL);
if ((env = getenv("TVNC_PROFILE")) != NULL && !strcmp(env, "1"))
rfbProfile = TRUE;
if ((env = getenv("TVNC_ICEDEBUG")) != NULL && !strcmp(env, "1"))
rfbInterframeDebug = TRUE;
if ((env = getenv("TVNC_ICEBLOCKSIZE")) != NULL) {
int iceBlockSize = atoi(env);
if (iceBlockSize >= 0) rfbICEBlockSize = iceBlockSize;
}
if ((env = getenv("TVNC_COMBINERECT")) != NULL) {
int combine = atoi(env);
if (combine > 0 && combine <= 65000) rfbCombineRect = combine;
}
cl->firstUpdate = TRUE;
/* The TigerVNC Viewer won't enable remote desktop resize until it receives
a desktop resize message from the server, so we give it one with the
first FBU. */
cl->reason = rfbEDSReasonServer;
cl->result = rfbEDSResultSuccess;
if (rfbAutoLosslessRefresh > 0.0) {
REGION_INIT(pScreen, &cl->lossyRegion, NullBox, 0);
if ((env = getenv("TVNC_ALRALL")) != NULL && !strcmp(env, "1"))
rfbALRAll = TRUE;
if ((env = getenv("TVNC_ALRCOPYRECT")) != NULL && !strcmp(env, "0"))
alrCopyRect = FALSE;
REGION_INIT(pScreen, &cl->alrRegion, NullBox, 0);
REGION_INIT(pScreen, &cl->alrEligibleRegion, NullBox, 0);
}
if ((env = getenv("TVNC_MT")) != NULL && !strcmp(env, "0"))
rfbMT = FALSE;
if ((env = getenv("TVNC_NTHREADS")) != NULL && strlen(env) >= 1) {
int temp = atoi(env);
if (temp >= 1 && temp <= MAX_ENCODING_THREADS)
rfbNumThreads = temp;
else
rfbLog("WARNING: Invalid value of TVNC_NTHREADS (%s) ignored\n", env);
}
if (np == -1 && rfbMT) {
rfbLog("WARNING: Could not determine CPU count. Multithreaded encoding disabled.\n");
rfbMT = FALSE;
}
if (!rfbMT) rfbNumThreads = 1;
else if (rfbNumThreads < 1) rfbNumThreads = min(np, 4);
if (rfbNumThreads > np) {
rfbLog("NOTICE: Encoding thread count has been clamped to CPU count\n");
rfbNumThreads = np;
}
if (rfbIdleTimeout > 0)
IdleTimerCancel();
cl->baseRTT = cl->minRTT = cl->minCongestedRTT = (unsigned)-1;
REGION_INIT(pScreen, &cl->cuRegion, NullBox, 0);
if (rfbInterframe == 1) {
if (!InterframeOn(cl)) {
rfbCloseClient(cl);
return NULL;
}
} else
InterframeOff(cl);
cl->clipFlags = rfbExtClipUTF8 | rfbExtClipRTF | rfbExtClipHTML |
rfbExtClipRequest | rfbExtClipNotify | rfbExtClipProvide;
cl->clipSizes[0] = 20 * 1024 * 1024;
return cl;
}
/*
* rfbClientConnectionGone is called from sockets.c just after a connection
* has gone away.
*/
void rfbClientConnectionGone(rfbClientPtr cl)
{
int i;
rfbRTTInfo *rttInfo, *tmp;
rfbClientPtr client;
Bool inList = FALSE;
if (cl->prev)
cl->prev->next = cl->next;
else
rfbClientHead = cl->next;
if (cl->next)
cl->next->prev = cl->prev;
TimerFree(cl->alrTimer);
TimerFree(cl->deferredUpdateTimer);
TimerFree(cl->congestionTimer);
#ifdef XVNC_AuthPAM
rfbPAMEnd(cl);
#endif
if (cl->login != NULL) {
rfbLog("Client %s (%s) gone\n", cl->login, cl->host);
free(cl->login);
} else {
rfbLog("Client %s gone\n", cl->host);
}
free(cl->host);
ShutdownTightThreads();
if (rfbAutoLosslessRefresh > 0.0) {
REGION_UNINIT(pScreen, &cl->lossyRegion);
REGION_UNINIT(pScreen, &cl->alrRegion);
REGION_UNINIT(pScreen, &cl->alrEligibleRegion);
}
/* Release the compression state structures if any. */
if (cl->compStreamInited == TRUE)
deflateEnd(&(cl->compStream));
for (i = 0; i < 4; i++) {
if (cl->zsActive[i])
deflateEnd(&cl->zsStruct[i]);
}
if (pointerDragClient == cl)
pointerDragClient = NULL;
if (pointerOwner == cl)
pointerOwner = NULL;
REGION_UNINIT(pScreen, &cl->copyRegion);
REGION_UNINIT(pScreen, &cl->modifiedRegion);
rfbPrintStats(cl);
free(cl->translateLookupTable);
rfbFreeZrleData(cl);
rfbHandleClipboardAnnounce(cl, FALSE);
free(cl->clientClipboard);
xorg_list_for_each_entry(client, &clipboardRequestors, entry) {
if (client == cl) inList = TRUE;
}
if (inList) xorg_list_del(&cl->entry);
xorg_list_for_each_entry_safe(rttInfo, tmp, &cl->pings, entry) {
xorg_list_del(&rttInfo->entry);
free(rttInfo);
}
InterframeOff(cl);
i = cl->numDevices;
while (i-- > 0)
RemoveExtInputDevice(cl, 0);
if (cl->captureFD >= 0)
close(cl->captureFD);
free(cl);
if (rfbClientHead == NULL && rfbIdleTimeout > 0)
IdleTimerSet();
}
/*
* rfbProcessClientMessage is called when there is data to read from a client.
*/
void rfbProcessClientMessage(rfbClientPtr cl)
{
rfbCorkSock(cl->sock);
if (cl->pendingSyncFence) {
cl->syncFence = TRUE;
cl->pendingSyncFence = FALSE;
}
switch (cl->state) {
case RFB_PROTOCOL_VERSION:
rfbProcessClientProtocolVersion(cl);
break;
case RFB_SECURITY_TYPE: /* protocol versions 3.7 and above */
rfbProcessClientSecurityType(cl);
break;
case RFB_TUNNELING_TYPE: /* protocol versions 3.7t, 3.8t */
rfbProcessClientTunnelingType(cl);
break;
case RFB_AUTH_TYPE: /* protocol versions 3.7t, 3.8t */
rfbProcessClientAuthType(cl);
break;
#if USETLS
case RFB_TLS_HANDSHAKE:
rfbAuthTLSHandshake(cl);
break;
#endif
case RFB_AUTHENTICATION:
rfbAuthProcessResponse(cl);
break;
case RFB_INITIALISATION:
cl->ledState = rfbLEDState;
rfbInitFlowControl(cl);
rfbProcessClientInitMessage(cl);
break;
default:
rfbProcessClientNormalMessage(cl);
}
CHECK_CLIENT_PTR(cl, return)
if (cl->syncFence) {
if (!rfbSendFence(cl, cl->fenceFlags, cl->fenceDataLen, cl->fenceData))
return;
cl->syncFence = FALSE;
}
rfbUncorkSock(cl->sock);
}
/*
* rfbProcessClientProtocolVersion is called when the client sends its
* protocol version.
*/
static void rfbProcessClientProtocolVersion(rfbClientPtr cl)
{
rfbProtocolVersionMsg pv;
int n, major, minor;
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) {
rfbLog("rfbProcessClientProtocolVersion: not a valid RFB client\n");
rfbCloseClient(cl);
return;
}
if (major != 3) {
rfbLog("Unsupported protocol version %d.%d\n", major, minor);
rfbCloseClient(cl);
return;
}
/* Always use one of the three standard versions of the RFB protocol. */
cl->protocol_minor_ver = minor;
if (minor > 8) /* buggy client */
cl->protocol_minor_ver = 8;
else if (minor > 3 && minor < 7) /* non-standard client */
cl->protocol_minor_ver = 3;
else if (minor < 3) /* ancient client */
cl->protocol_minor_ver = 3;
if (cl->protocol_minor_ver != minor)
rfbLog("Non-standard protocol version 3.%d, using 3.%d instead\n", minor,
cl->protocol_minor_ver);
else
rfbLog("Using protocol version 3.%d\n", cl->protocol_minor_ver);
/* TightVNC protocol extensions are not enabled yet. */
cl->protocol_tightvnc = FALSE;
rfbAuthNewClient(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;
rfbClientPtr otherCl, nextCl;
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(rfbFB.width);
si->framebufferHeight = Swap16IfLE(rfbFB.height);
si->format = rfbServerFormat;
si->format.redMax = Swap16IfLE(si->format.redMax);
si->format.greenMax = Swap16IfLE(si->format.greenMax);
si->format.blueMax = Swap16IfLE(si->format.blueMax);
if (strlen(desktopName) > 128) /* sanity check on desktop name len */
desktopName[128] = 0;
sprintf(buf + sz_rfbServerInitMsg, "%s", desktopName);
len = strlen(buf + sz_rfbServerInitMsg);
si->nameLength = Swap32IfLE(len);
WRITE_OR_CLOSE(buf, sz_rfbServerInitMsg + len, return);
if (cl->protocol_tightvnc)
rfbSendInteractionCaps(cl); /* protocol 3.7t */
/* Dispatch client input to rfbProcessClientNormalMessage(). */
cl->state = RFB_NORMAL;
if (!cl->reverseConnection &&
(rfbNeverShared || (!rfbAlwaysShared && !ci.shared))) {
if (!rfbDisconnect) {
for (otherCl = rfbClientHead; otherCl; otherCl = otherCl->next) {
if ((otherCl != cl) && (otherCl->state == RFB_NORMAL)) {
rfbLog("-dontdisconnect: Not shared & existing client\n");
rfbLog(" refusing new client %s\n", cl->host);
rfbCloseClient(cl);
return;
}
}
} else {
for (otherCl = rfbClientHead; otherCl; otherCl = nextCl) {
nextCl = otherCl->next;
if ((otherCl != cl) && (otherCl->state == RFB_NORMAL)) {
rfbLog("Not shared - closing connection to client %s\n",
otherCl->host);
rfbCloseClient(otherCl);
}
}
}
}
}
/*
* rfbSendInteractionCaps is called after sending the server
* initialisation message, only if TightVNC protocol extensions were
* enabled (protocol versions 3.7t, 3.8t). In this function, we send
* the lists of supported protocol messages and encodings.
*/
/* Update these constants on changing capability lists below! */
#define N_SMSG_CAPS 0
#define N_CMSG_CAPS 0
#define N_ENC_CAPS 17
void rfbSendInteractionCaps(rfbClientPtr cl)
{
rfbInteractionCapsMsg intr_caps;
rfbCapabilityInfo enc_list[N_ENC_CAPS];
int i;
/* Fill in the header structure sent prior to capability lists. */
intr_caps.nServerMessageTypes = Swap16IfLE(N_SMSG_CAPS);
intr_caps.nClientMessageTypes = Swap16IfLE(N_CMSG_CAPS);
intr_caps.nEncodingTypes = Swap16IfLE(N_ENC_CAPS);
intr_caps.pad = 0;
/* Supported server->client message types. */
/* For future file transfer support:
i = 0;
SetCapInfo(&smsg_list[i++], rfbFileListData, rfbTightVncVendor);
SetCapInfo(&smsg_list[i++], rfbFileDownloadData, rfbTightVncVendor);
SetCapInfo(&smsg_list[i++], rfbFileUploadCancel, rfbTightVncVendor);
SetCapInfo(&smsg_list[i++], rfbFileDownloadFailed, rfbTightVncVendor);
if (i != N_SMSG_CAPS) {
rfbLog("rfbSendInteractionCaps: assertion failed, i != N_SMSG_CAPS\n");
rfbCloseClient(cl);
return;
}
*/
/* Supported client->server message types. */
/* For future file transfer support:
i = 0;
SetCapInfo(&cmsg_list[i++], rfbFileListRequest, rfbTightVncVendor);
SetCapInfo(&cmsg_list[i++], rfbFileDownloadRequest, rfbTightVncVendor);
SetCapInfo(&cmsg_list[i++], rfbFileUploadRequest, rfbTightVncVendor);
SetCapInfo(&cmsg_list[i++], rfbFileUploadData, rfbTightVncVendor);
SetCapInfo(&cmsg_list[i++], rfbFileDownloadCancel, rfbTightVncVendor);
SetCapInfo(&cmsg_list[i++], rfbFileUploadFailed, rfbTightVncVendor);
if (i != N_CMSG_CAPS) {
rfbLog("rfbSendInteractionCaps: assertion failed, i != N_CMSG_CAPS\n");
rfbCloseClient(cl);
return;
}
*/
/* Encoding types. */
i = 0;
SetCapInfo(&enc_list[i++], rfbEncodingCopyRect, rfbStandardVendor);
SetCapInfo(&enc_list[i++], rfbEncodingRRE, rfbStandardVendor);
SetCapInfo(&enc_list[i++], rfbEncodingCoRRE, rfbStandardVendor);
SetCapInfo(&enc_list[i++], rfbEncodingHextile, rfbStandardVendor);
SetCapInfo(&enc_list[i++], rfbEncodingZlib, rfbTridiaVncVendor);
SetCapInfo(&enc_list[i++], rfbEncodingZRLE, rfbTridiaVncVendor);
SetCapInfo(&enc_list[i++], rfbEncodingZYWRLE, rfbTridiaVncVendor);
SetCapInfo(&enc_list[i++], rfbEncodingTight, rfbTightVncVendor);
SetCapInfo(&enc_list[i++], rfbEncodingCompressLevel0, rfbTightVncVendor);
SetCapInfo(&enc_list[i++], rfbEncodingQualityLevel0, rfbTightVncVendor);
SetCapInfo(&enc_list[i++], rfbEncodingFineQualityLevel0, rfbTurboVncVendor);
SetCapInfo(&enc_list[i++], rfbEncodingSubsamp1X, rfbTurboVncVendor);
SetCapInfo(&enc_list[i++], rfbEncodingXCursor, rfbTightVncVendor);
SetCapInfo(&enc_list[i++], rfbEncodingRichCursor, rfbTightVncVendor);
SetCapInfo(&enc_list[i++], rfbEncodingPointerPos, rfbTightVncVendor);
SetCapInfo(&enc_list[i++], rfbEncodingLastRect, rfbTightVncVendor);
SetCapInfo(&enc_list[i++], rfbGIIServer, rfbGIIVendor);
if (i != N_ENC_CAPS) {
rfbLog("rfbSendInteractionCaps: assertion failed, i != N_ENC_CAPS\n");
rfbCloseClient(cl);
return;
}
/* Send header and capability lists */
WRITE_OR_CLOSE((char *)&intr_caps, sz_rfbInteractionCapsMsg, return);
WRITE_OR_CLOSE((char *)&enc_list[0], sz_rfbCapabilityInfo * N_ENC_CAPS,
return);
/* Dispatch client input to rfbProcessClientNormalMessage(). */
cl->state = RFB_NORMAL;
}
/*
* rfbProcessClientNormalMessage is called when the client has sent a normal
* protocol message.
*/
static void rfbProcessClientNormalMessage(rfbClientPtr cl)
{
rfbClientToServerMsg msg;
char *str;
READ_OR_CLOSE((char *)&msg, 1, return);
switch (msg.type) {
case rfbSetPixelFormat:
READ_OR_CLOSE(((char *)&msg) + 1, sz_rfbSetPixelFormatMsg - 1, return);
cl->format.bitsPerPixel = msg.spf.format.bitsPerPixel;
cl->format.depth = msg.spf.format.depth;
cl->format.bigEndian = (msg.spf.format.bigEndian ? 1 : 0);
cl->format.trueColour = (msg.spf.format.trueColour ? 1 : 0);
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;
rfbSetTranslateFunction(cl);
return;
case rfbFixColourMapEntries:
READ_OR_CLOSE(((char *)&msg) + 1, sz_rfbFixColourMapEntriesMsg - 1,
return);
rfbLog("rfbProcessClientNormalMessage: FixColourMapEntries unsupported\n");
rfbCloseClient(cl);
return;
case rfbSetEncodings:
{
int i;
CARD32 enc;
Bool firstExtClipboard = !cl->enableExtClipboard;
Bool firstFence = !cl->enableFence;
Bool firstCU = !cl->enableCU;
Bool firstGII = !cl->enableGII;
Bool firstQEMUExtKeyEvent = !cl->enableQEMUExtKeyEvent;
Bool firstLEDState = !SUPPORTS_LED_STATE(cl);
Bool logTightCompressLevel = FALSE;
READ_OR_CLOSE(((char *)&msg) + 1, sz_rfbSetEncodingsMsg - 1, return);
msg.se.nEncodings = Swap16IfLE(msg.se.nEncodings);
cl->preferredEncoding = -1;
cl->useCopyRect = FALSE;
cl->enableCursorShapeUpdates = FALSE;
cl->enableCursorPosUpdates = FALSE;
cl->enableLastRectEncoding = FALSE;
cl->tightCompressLevel = TIGHT_DEFAULT_COMPRESSION;
cl->tightSubsampLevel = TIGHT_DEFAULT_SUBSAMP;
cl->tightQualityLevel = -1;
cl->imageQualityLevel = -1;
for (i = 0; i < msg.se.nEncodings; i++) {
READ32_OR_CLOSE(enc, return);
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;
case rfbEncodingZlib:
if (cl->preferredEncoding == -1) {
cl->preferredEncoding = enc;
rfbLog("Using zlib encoding for client %s\n", cl->host);
}
break;
case rfbEncodingZRLE:
if (cl->preferredEncoding == -1) {
cl->preferredEncoding = enc;
rfbLog("Using ZRLE encoding for client %s\n", cl->host);
}
break;
case rfbEncodingZYWRLE:
if (cl->preferredEncoding == -1) {
cl->preferredEncoding = enc;
rfbLog("Using ZYWRLE encoding for client %s\n", cl->host);
}
break;
case rfbEncodingTight:
if (cl->preferredEncoding == -1) {
cl->preferredEncoding = enc;
rfbLog("Using tight encoding for client %s\n", cl->host);
}
break;
case rfbEncodingXCursor:
if (!cl->enableCursorShapeUpdates) {
rfbLog("Enabling X-style cursor updates for client %s\n",
cl->host);