394 lines
11 KiB
C
394 lines
11 KiB
C
/*
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* Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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/*
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* vncviewer.c - the Xt-based VNC viewer.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include "rfbclient.h"
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#include "tls.h"
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static void Dummy(rfbClient* client) {
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}
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static rfbBool DummyPoint(rfbClient* client, int x, int y) {
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return TRUE;
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}
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static void DummyRect(rfbClient* client, int x, int y, int w, int h) {
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}
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#include <termios.h>
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static char* ReadPassword(rfbClient* client) {
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int i;
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char* p=calloc(1,9);
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if (!p) return p;
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struct termios save,noecho;
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if(tcgetattr(fileno(stdin),&save)!=0) return p;
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noecho=save; noecho.c_lflag &= ~ECHO;
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if(tcsetattr(fileno(stdin),TCSAFLUSH,&noecho)!=0) return p;
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fprintf(stderr,"Password: ");
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fflush(stderr);
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i=0;
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while(1) {
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int c=fgetc(stdin);
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if(c=='\n')
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break;
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if(i<8) {
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p[i]=c;
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i++;
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p[i]=0;
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}
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}
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tcsetattr(fileno(stdin),TCSAFLUSH,&save);
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return p;
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}
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static rfbBool MallocFrameBuffer(rfbClient* client) {
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uint64_t allocSize;
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if(client->frameBuffer) {
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free(client->frameBuffer);
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client->frameBuffer = NULL;
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}
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/* SECURITY: promote 'width' into uint64_t so that the multiplication does not overflow
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'width' and 'height' are 16-bit integers per RFB protocol design
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SIZE_MAX is the maximum value that can fit into size_t
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*/
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allocSize = (uint64_t)client->width * client->height * client->format.bitsPerPixel/8;
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if (allocSize >= SIZE_MAX) {
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rfbClientErr("CRITICAL: cannot allocate frameBuffer, requested size is too large\n");
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return FALSE;
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}
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client->frameBuffer=malloc( (size_t)allocSize );
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if (client->frameBuffer == NULL)
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rfbClientErr("CRITICAL: frameBuffer allocation failed, requested size too large or not enough memory?\n");
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return client->frameBuffer?TRUE:FALSE;
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}
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/* messages */
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static rfbBool CheckRect(rfbClient* client, int x, int y, int w, int h) {
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return x + w <= client->width && y + h <= client->height;
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}
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static void FillRectangle(rfbClient* client, int x, int y, int w, int h, uint32_t colour) {
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int i,j;
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if (client->frameBuffer == NULL) {
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return;
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}
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if (!CheckRect(client, x, y, w, h)) {
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rfbClientLog("Rect out of bounds: %dx%d at (%d, %d)\n", x, y, w, h);
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return;
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}
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#define FILL_RECT(BPP) \
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for(j=y*client->width;j<(y+h)*client->width;j+=client->width) \
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for(i=x;i<x+w;i++) \
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((uint##BPP##_t*)client->frameBuffer)[j+i]=colour;
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switch(client->format.bitsPerPixel) {
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case 8: FILL_RECT(8); break;
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case 16: FILL_RECT(16); break;
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case 32: FILL_RECT(32); break;
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default:
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rfbClientLog("Unsupported bitsPerPixel: %d\n",client->format.bitsPerPixel);
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}
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}
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static void CopyRectangle(rfbClient* client, const uint8_t* buffer, int x, int y, int w, int h) {
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int j;
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if (client->frameBuffer == NULL) {
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return;
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}
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if (!CheckRect(client, x, y, w, h)) {
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rfbClientLog("Rect out of bounds: %dx%d at (%d, %d)\n", x, y, w, h);
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return;
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}
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#define COPY_RECT(BPP) \
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{ \
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int rs = w * BPP / 8, rs2 = client->width * BPP / 8; \
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for (j = ((x * (BPP / 8)) + (y * rs2)); j < (y + h) * rs2; j += rs2) { \
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memcpy(client->frameBuffer + j, buffer, rs); \
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buffer += rs; \
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} \
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}
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switch(client->format.bitsPerPixel) {
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case 8: COPY_RECT(8); break;
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case 16: COPY_RECT(16); break;
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case 32: COPY_RECT(32); break;
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default:
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rfbClientLog("Unsupported bitsPerPixel: %d\n",client->format.bitsPerPixel);
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}
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}
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/* TODO: test */
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static void CopyRectangleFromRectangle(rfbClient* client, int src_x, int src_y, int w, int h, int dest_x, int dest_y) {
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int i,j;
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if (client->frameBuffer == NULL) {
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return;
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}
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if (!CheckRect(client, src_x, src_y, w, h)) {
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rfbClientLog("Source rect out of bounds: %dx%d at (%d, %d)\n", src_x, src_y, w, h);
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return;
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}
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if (!CheckRect(client, dest_x, dest_y, w, h)) {
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rfbClientLog("Dest rect out of bounds: %dx%d at (%d, %d)\n", dest_x, dest_y, w, h);
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return;
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}
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#define COPY_RECT_FROM_RECT(BPP) \
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{ \
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uint##BPP##_t* _buffer=((uint##BPP##_t*)client->frameBuffer)+(src_y-dest_y)*client->width+src_x-dest_x; \
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if (dest_y < src_y) { \
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for(j = dest_y*client->width; j < (dest_y+h)*client->width; j += client->width) { \
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if (dest_x < src_x) { \
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for(i = dest_x; i < dest_x+w; i++) { \
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((uint##BPP##_t*)client->frameBuffer)[j+i]=_buffer[j+i]; \
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} \
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} else { \
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for(i = dest_x+w-1; i >= dest_x; i--) { \
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((uint##BPP##_t*)client->frameBuffer)[j+i]=_buffer[j+i]; \
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} \
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} \
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} \
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} else { \
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for(j = (dest_y+h-1)*client->width; j >= dest_y*client->width; j-=client->width) { \
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if (dest_x < src_x) { \
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for(i = dest_x; i < dest_x+w; i++) { \
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((uint##BPP##_t*)client->frameBuffer)[j+i]=_buffer[j+i]; \
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} \
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} else { \
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for(i = dest_x+w-1; i >= dest_x; i--) { \
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((uint##BPP##_t*)client->frameBuffer)[j+i]=_buffer[j+i]; \
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} \
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} \
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} \
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} \
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}
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switch(client->format.bitsPerPixel) {
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case 8: COPY_RECT_FROM_RECT(8); break;
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case 16: COPY_RECT_FROM_RECT(16); break;
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case 32: COPY_RECT_FROM_RECT(32); break;
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default:
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rfbClientLog("Unsupported bitsPerPixel: %d\n",client->format.bitsPerPixel);
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}
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}
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static void initAppData(AppData* data) {
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data->shareDesktop=TRUE;
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data->viewOnly=FALSE;
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data->encodingsString="tight zrle ultra copyrect hextile zlib corre rre raw";
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data->useBGR233=FALSE;
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data->nColours=0;
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data->forceOwnCmap=FALSE;
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data->forceTrueColour=FALSE;
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data->requestedDepth=0;
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data->compressLevel=3;
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data->qualityLevel=5;
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#ifdef LIBVNCSERVER_HAVE_LIBJPEG
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data->enableJPEG=TRUE;
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#else
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data->enableJPEG=FALSE;
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#endif
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data->useRemoteCursor=FALSE;
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}
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rfbClient* rfbGetClient(int bitsPerSample,int samplesPerPixel,
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int bytesPerPixel) {
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rfbClient* client=(rfbClient*)calloc(sizeof(rfbClient),1);
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if(!client) {
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rfbClientErr("Couldn't allocate client structure!\n");
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return NULL;
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}
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initAppData(&client->appData);
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client->endianTest = 1;
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client->programName="";
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client->serverHost=strdup("");
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client->serverPort=5900;
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client->destHost = NULL;
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client->destPort = 5900;
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client->connectTimeout = DEFAULT_CONNECT_TIMEOUT;
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client->readTimeout = DEFAULT_READ_TIMEOUT;
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/* default: use complete frame buffer */
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client->updateRect.x = -1;
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client->frameBuffer = NULL;
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client->outputWindow = 0;
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client->format.bitsPerPixel = bytesPerPixel*8;
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client->format.depth = bitsPerSample*samplesPerPixel;
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client->appData.requestedDepth=client->format.depth;
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client->format.bigEndian = *(char *)&client->endianTest?FALSE:TRUE;
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client->format.trueColour = 1;
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if (client->format.bitsPerPixel == 8) {
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client->format.redMax = 7;
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client->format.greenMax = 7;
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client->format.blueMax = 3;
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client->format.redShift = 0;
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client->format.greenShift = 3;
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client->format.blueShift = 6;
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} else {
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client->format.redMax = (1 << bitsPerSample) - 1;
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client->format.greenMax = (1 << bitsPerSample) - 1;
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client->format.blueMax = (1 << bitsPerSample) - 1;
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if(!client->format.bigEndian) {
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client->format.redShift = 0;
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client->format.greenShift = bitsPerSample;
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client->format.blueShift = bitsPerSample * 2;
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} else {
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if(client->format.bitsPerPixel==8*3) {
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client->format.redShift = bitsPerSample*2;
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client->format.greenShift = bitsPerSample*1;
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client->format.blueShift = 0;
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} else {
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client->format.redShift = bitsPerSample*3;
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client->format.greenShift = bitsPerSample*2;
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client->format.blueShift = bitsPerSample;
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}
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}
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}
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client->bufoutptr=client->buf;
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client->buffered=0;
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#ifdef LIBVNCSERVER_HAVE_LIBZ
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client->raw_buffer_size = -1;
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client->decompStreamInited = FALSE;
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#ifdef LIBVNCSERVER_HAVE_LIBJPEG
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memset(client->zlibStreamActive,0,sizeof(rfbBool)*4);
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#endif
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#endif
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client->HandleCursorPos = DummyPoint;
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client->SoftCursorLockArea = DummyRect;
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client->SoftCursorUnlockScreen = Dummy;
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client->GotFrameBufferUpdate = DummyRect;
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client->GotCopyRect = CopyRectangleFromRectangle;
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client->GotFillRect = FillRectangle;
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client->GotBitmap = CopyRectangle;
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client->FinishedFrameBufferUpdate = NULL;
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client->GetPassword = ReadPassword;
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client->MallocFrameBuffer = MallocFrameBuffer;
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client->Bell = Dummy;
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client->CurrentKeyboardLedState = 0;
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client->HandleKeyboardLedState = (HandleKeyboardLedStateProc)DummyPoint;
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client->QoS_DSCP = 0;
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client->authScheme = 0;
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client->subAuthScheme = 0;
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client->GetCredential = NULL;
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client->tlsSession = NULL;
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client->LockWriteToTLS = NULL;
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client->UnlockWriteToTLS = NULL;
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client->sock = RFB_INVALID_SOCKET;
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client->listenSock = RFB_INVALID_SOCKET;
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client->listenAddress = NULL;
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client->listen6Sock = RFB_INVALID_SOCKET;
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client->listen6Address = NULL;
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client->clientAuthSchemes = NULL;
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#ifdef LIBVNCSERVER_HAVE_SASL
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client->GetSASLMechanism = NULL;
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client->GetUser = NULL;
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client->saslSecret = NULL;
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#endif /* LIBVNCSERVER_HAVE_SASL */
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client->requestedResize = FALSE;
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client->screen.width = 0;
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client->screen.height = 0;
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return client;
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}
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void rfbClientCleanup(rfbClient* client) {
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#ifdef LIBVNCSERVER_HAVE_LIBZ
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int i;
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for ( i = 0; i < 4; i++ ) {
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if (client->zlibStreamActive[i] == TRUE ) {
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if (inflateEnd (&client->zlibStream[i]) != Z_OK &&
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client->zlibStream[i].msg != NULL)
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rfbClientLog("inflateEnd: %s\n", client->zlibStream[i].msg);
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}
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}
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if ( client->decompStreamInited == TRUE ) {
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if (inflateEnd (&client->decompStream) != Z_OK &&
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client->decompStream.msg != NULL)
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rfbClientLog("inflateEnd: %s\n", client->decompStream.msg );
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}
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#endif
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if (client->ultra_buffer)
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free(client->ultra_buffer);
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if (client->raw_buffer)
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free(client->raw_buffer);
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FreeTLS(client);
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while (client->clientData) {
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rfbClientData* next = client->clientData->next;
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free(client->clientData);
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client->clientData = next;
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}
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free(client->vncRec);
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if (client->sock != RFB_INVALID_SOCKET)
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rfbCloseSocket(client->sock);
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if (client->listenSock != RFB_INVALID_SOCKET)
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rfbCloseSocket(client->listenSock);
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free(client->desktopName);
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free(client->serverHost);
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if (client->destHost)
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free(client->destHost);
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if (client->clientAuthSchemes)
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free(client->clientAuthSchemes);
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#ifdef LIBVNCSERVER_HAVE_SASL
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if (client->saslSecret)
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free(client->saslSecret);
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#endif /* LIBVNCSERVER_HAVE_SASL */
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free(client);
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}
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