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/*
* 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.
*/
/*
* vncviewer.c - the Xt-based VNC viewer.
*/
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <rfb/rfbclient.h>
static void Dummy(rfbClient* client) {
}
static Bool DummyPoint(rfbClient* client, int x, int y) {
return TRUE;
}
static void DummyRect(rfbClient* client, int x, int y, int w, int h) {
}
static char* NoPassword(rfbClient* client) {
return "";
}
static Bool MallocFrameBuffer(rfbClient* client) {
if(client->frameBuffer)
free(client->frameBuffer);
client->frameBuffer=malloc(client->width*client->height*client->format.bitsPerPixel/8);
return client->frameBuffer?TRUE:FALSE;
}
rfbClient* rfbGetClient(int* argc,char** argv,
int bitsPerSample,int samplesPerPixel,
int bytesPerPixel) {
rfbClient* client=(rfbClient*)calloc(sizeof(rfbClient),1);
client->programName = argv[0];
client->endianTest = 1;
client->format.bitsPerPixel = bytesPerPixel*8;
client->format.depth = bitsPerSample*samplesPerPixel;
client->format.bigEndian = *(char *)&client->endianTest?FALSE:TRUE;
client->format.trueColour = TRUE;
if (client->format.bitsPerPixel == 8) {
client->format.redMax = 7;
client->format.greenMax = 7;
client->format.blueMax = 3;
client->format.redShift = 0;
client->format.greenShift = 3;
client->format.blueShift = 6;
} else {
client->format.redMax = (1 << bitsPerSample) - 1;
client->format.greenMax = (1 << bitsPerSample) - 1;
client->format.blueMax = (1 << bitsPerSample) - 1;
if(!client->format.bigEndian) {
client->format.redShift = 0;
client->format.greenShift = bitsPerSample;
client->format.blueShift = bitsPerSample * 2;
} else {
if(client->format.bitsPerPixel==8*3) {
client->format.redShift = bitsPerSample*2;
client->format.greenShift = bitsPerSample*1;
client->format.blueShift = 0;
} else {
client->format.redShift = bitsPerSample*3;
client->format.greenShift = bitsPerSample*2;
client->format.blueShift = bitsPerSample;
}
}
}
client->HandleCursorPos = DummyPoint;
client->SoftCursorLockArea = DummyRect;
client->SoftCursorUnlockScreen = Dummy;
client->FramebufferUpdateReceived = DummyRect;
client->GetPassword = NoPassword;
client->MallocFrameBuffer = MallocFrameBuffer;
client->Bell = Dummy;
return client;
}
void PrintRect(rfbClient* client, int x, int y, int w, int h) {
fprintf(stderr,"Received an update for %d,%d,%d,%d.\n",x,y,w,h);
}
void SaveFramebufferAsPGM(rfbClient* client, int x, int y, int w, int h) {
static time_t t=0,t1;
FILE* f;
int i,j;
int bpp=client->format.bitsPerPixel/8;
int row_stride=client->width*bpp;
/* save one picture only if the last is older than 2 seconds */
t1=time(0);
if(t1-t>2)
t=t1;
else
return;
/* assert bpp=4 */
if(bpp!=4) {
fprintf(stderr,"bpp = %d (!=4)\n",bpp);
return;
}
f=fopen("/tmp/framebuffer.ppm","wb");
fprintf(f,"P6\n# %s\n%d %d\n255\n",client->desktopName,client->width,client->height);
for(j=0;j<client->height*row_stride;j+=row_stride)
for(i=0;i<client->width*bpp;i+=bpp) {
if(client->format.bigEndian) {
fputc(client->frameBuffer[j+i+bpp-1],f);
fputc(client->frameBuffer[j+i+bpp-2],f);
fputc(client->frameBuffer[j+i+bpp-3],f);
} else {
fputc(client->frameBuffer[j+i+bpp+0],f);
fputc(client->frameBuffer[j+i+bpp+1],f);
fputc(client->frameBuffer[j+i+bpp+2],f);
}
}
fclose(f);
}
void
vncEncryptBytes(unsigned char *bytes, char *passwd);
int
main(int argc, char **argv)
{
int i;
rfbClient* client = rfbGetClient(&argc,argv,8,3,4);
const char* vncServerHost="";
int vncServerPort=5900;
char buf1[]="pass",buf2[]="pass";
vncEncryptBytes(buf1,buf2);
client->FramebufferUpdateReceived = PrintRect;
client->FramebufferUpdateReceived = SaveFramebufferAsPGM;
/* The -listen option is used to make us a daemon process which listens for
incoming connections from servers, rather than actively connecting to a
given server. The -tunnel and -via options are useful to create
connections tunneled via SSH port forwarding. We must test for the
-listen option before invoking any Xt functions - this is because we use
forking, and Xt doesn't seem to cope with forking very well. For -listen
option, when a successful incoming connection has been accepted,
listenForIncomingConnections() returns, setting the listenSpecified
flag. */
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "-listen") == 0) {
listenForIncomingConnections(client);
break;
} else {
char* colon=strchr(argv[i],':');
vncServerHost=argv[i];
if(colon) {
*colon=0;
vncServerPort=atoi(colon+1);
} else
vncServerPort=0;
vncServerPort+=5900;
}
/* TODO:
if (strcmp(argv[i], "-tunnel") == 0 || strcmp(argv[i], "-via") == 0) {
if (!createTunnel(&argc, argv, i))
exit(1);
break;
}
*/
}
/* Call the main Xt initialisation function. It parses command-line options,
generating appropriate resource specs, and makes a connection to the X
display. */
/* TODO: cmdline args
toplevel = XtVaAppInitialize(&appContext, "Vncviewer",
cmdLineOptions, numCmdLineOptions,
&argc, argv, fallback_resources,
XtNborderWidth, 0, NULL);
dpy = XtDisplay(toplevel);
*/
/* Interpret resource specs and process any remaining command-line arguments
(i.e. the VNC server name). If the server name isn't specified on the
command line, getArgsAndResources() will pop up a dialog box and wait
for one to be entered. */
/*
GetArgsAndResources(argc, argv);
*/
/* Unless we accepted an incoming connection, make a TCP connection to the
given VNC server */
if (!client->listenSpecified) {
if (!ConnectToRFBServer(client,vncServerHost, vncServerPort)) exit(1);
}
/* Initialise the VNC connection, including reading the password */
if (!InitialiseRFBConnection(client)) exit(1);
SetFormatAndEncodings(client);
client->width=client->si.framebufferWidth;
client->height=client->si.framebufferHeight;
client->MallocFrameBuffer(client);
SendFramebufferUpdateRequest(client,0,0,client->width,client->height,FALSE);
/* Now enter the main loop, processing VNC messages. X events will
automatically be processed whenever the VNC connection is idle. */
while (1) {
if (!HandleRFBServerMessage(client))
break;
}
return 0;
}
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