xserverdesktop.cc

linux可以运行程序源码

/* Copyright (C) 2002-2005 RealVNC Ltd.  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.
 */
//
// XserverDesktop.cxx
//

#include <stdio.h>
#include <strings.h>
#include <unistd.h>
#include <pwd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/utsname.h>
#include <network/TcpSocket.h>
#include <rfb/Exception.h>
#include <rfb/VNCServerST.h>
#include <rfb/HTTPServer.h>
#include <rfb/LogWriter.h>
#include <rfb/Configuration.h>
#include "XserverDesktop.h"
#include "vncExtInit.h"

extern "C" {
#define public c_public
#define class c_class

  // windowTable is in globals.h in XFree 4, but not in XFree 3 unfortunately
extern WindowPtr *WindowTable;
extern char *display;

#include "inputstr.h"
#include "servermd.h"
#include "colormapst.h"
#include "resource.h"
#include "cursorstr.h"
#include "windowstr.h"
#define XK_CYRILLIC
#include "keysym.h"
#undef public
#undef class
}

using namespace rfb;
using namespace network;

static LogWriter vlog("XserverDesktop");

rfb::IntParameter deferUpdateTime("DeferUpdate",
                                  "Time in milliseconds to defer updates",40);

rfb::BoolParameter alwaysSetDeferUpdateTimer("AlwaysSetDeferUpdateTimer",
                  "Always reset the defer update timer on every change",false);

IntParameter queryConnectTimeout("QueryConnectTimeout",
                                 "Number of seconds to show the Accept Connection dialog before "
                                 "rejecting the connection",
                                 10);

static KeyCode KeysymToKeycode(KeySymsPtr keymap, KeySym ks, int* col);

static rdr::U8 reverseBits[] = {
  0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 0x10, 0x90, 0x50, 0xd0,
  0x30, 0xb0, 0x70, 0xf0, 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
  0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, 0x04, 0x84, 0x44, 0xc4,
  0x24, 0xa4, 0x64, 0xe4, 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
  0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, 0x1c, 0x9c, 0x5c, 0xdc,
  0x3c, 0xbc, 0x7c, 0xfc, 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
  0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, 0x0a, 0x8a, 0x4a, 0xca,
  0x2a, 0xaa, 0x6a, 0xea, 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
  0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, 0x16, 0x96, 0x56, 0xd6,
  0x36, 0xb6, 0x76, 0xf6, 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
  0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, 0x01, 0x81, 0x41, 0xc1,
  0x21, 0xa1, 0x61, 0xe1, 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
  0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, 0x19, 0x99, 0x59, 0xd9,
  0x39, 0xb9, 0x79, 0xf9, 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
  0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, 0x0d, 0x8d, 0x4d, 0xcd,
  0x2d, 0xad, 0x6d, 0xed, 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
  0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, 0x13, 0x93, 0x53, 0xd3,
  0x33, 0xb3, 0x73, 0xf3, 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
  0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, 0x07, 0x87, 0x47, 0xc7,
  0x27, 0xa7, 0x67, 0xe7, 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
  0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, 0x1f, 0x9f, 0x5f, 0xdf,
  0x3f, 0xbf, 0x7f, 0xff
};


class FileHTTPServer : public rfb::HTTPServer {
public:
  FileHTTPServer(XserverDesktop* d) : desktop(d) {}
  virtual ~FileHTTPServer() {}

  virtual rdr::InStream* getFile(const char* name, const char** contentType,
                                 int* contentLength, time_t* lastModified)
  {
    if (name[0] != '/' || strstr(name, "..") != 0) {
      vlog.info("http request was for invalid file name");
      return 0;
    }

    if (strcmp(name, "/") == 0) name = "/index.vnc";

    CharArray httpDirStr(httpDir.getData());
    CharArray fname(strlen(httpDirStr.buf)+strlen(name)+1);
    sprintf(fname.buf, "%s%s", httpDirStr.buf, name);
    int fd = open(fname.buf, O_RDONLY);
    if (fd < 0) return 0;
    rdr::InStream* is = new rdr::FdInStream(fd, -1, 0, true);
    *contentType = guessContentType(name, *contentType);
    if (strlen(name) > 4 && strcasecmp(&name[strlen(name)-4], ".vnc") == 0) {
      is = new rdr::SubstitutingInStream(is, desktop, 20);
      *contentType = "text/html";
    } else {
      struct stat st;
      if (fstat(fd, &st) == 0) {
        *contentLength = st.st_size;
        *lastModified = st.st_mtime;
      }
    }
    return is;
  }

  XserverDesktop* desktop;
};


XserverDesktop::XserverDesktop(ScreenPtr pScreen_,
                               network::TcpListener* listener_,
                               network::TcpListener* httpListener_,
                               const char* name, void* fbptr)
  : pScreen(pScreen_), deferredUpdateTimer(0), dummyTimer(0),
    server(0), httpServer(0),
    listener(listener_), httpListener(httpListener_),
    cmap(0), deferredUpdateTimerSet(false),
    grabbing(false), ignoreHooks_(false), directFbptr(fbptr != 0),
    oldButtonMask(0),
    queryConnectId(0)
{
  int i;
  format.depth = pScreen->rootDepth;
  for (i = 0; i < screenInfo.numPixmapFormats; i++) {
    if (screenInfo.formats[i].depth == format.depth) {
      format.bpp = screenInfo.formats[i].bitsPerPixel;
      break;
    }
  }
  if (i == screenInfo.numPixmapFormats) {
    fprintf(stderr,"no pixmap format for root depth???\n");
    abort();
  }
  format.bigEndian = (screenInfo.imageByteOrder == MSBFirst);

  VisualPtr vis;
  for (i = 0; i < pScreen->numVisuals; i++) {
    if (pScreen->visuals[i].vid == pScreen->rootVisual) {
      vis = &pScreen->visuals[i];
      break;
    }
  }
  if (i == pScreen->numVisuals) {
    fprintf(stderr,"no visual rec for root visual???\n");
    abort();
  }
  format.trueColour = (vis->c_class == TrueColor);
  if (!format.trueColour && format.bpp != 8)
    throw rfb::Exception("X server uses unsupported visual");
  format.redShift   = ffs(vis->redMask) - 1;
  format.greenShift = ffs(vis->greenMask) - 1;
  format.blueShift  = ffs(vis->blueMask) - 1;
  format.redMax     = vis->redMask   >> format.redShift;
  format.greenMax   = vis->greenMask >> format.greenShift;
  format.blueMax    = vis->blueMask  >> format.blueShift;

  width_ = pScreen->width;
  height_ = pScreen->height;
  if (fbptr)
    data = (rdr::U8*)fbptr;
  else
    data = new rdr::U8[pScreen->width * pScreen->height * (format.bpp/8)];
  colourmap = this;

  serverReset(pScreen);

  server = new VNCServerST(name, this);
  server->setPixelBuffer(this);
  server->setQueryConnectionHandler(this);

  if (httpListener)
    httpServer = new FileHTTPServer(this);
}

XserverDesktop::~XserverDesktop()
{
  if (!directFbptr)
    delete [] data;
  TimerFree(deferredUpdateTimer);
  TimerFree(dummyTimer);
  delete httpServer;
  delete server;
}

void XserverDesktop::serverReset(ScreenPtr pScreen_)
{
  pScreen = pScreen_;
  XID* ids = new XID[pScreen->maxInstalledCmaps];
  int nmaps = (*pScreen->ListInstalledColormaps)(pScreen, ids);
  cmap = (ColormapPtr)LookupIDByType(ids[0], RT_COLORMAP);
  delete [] ids;
}

char* XserverDesktop::substitute(const char* varName)
{
  if (strcmp(varName, "$$") == 0) {
    return rfb::strDup("$");
  }
  if (strcmp(varName, "$PORT") == 0) {
    char* str = new char[10];
    sprintf(str, "%d", listener ? listener->getMyPort() : 0);
    return str;
  }
  if (strcmp(varName, "$WIDTH") == 0) {
    char* str = new char[10];
    sprintf(str, "%d", width());
    return str;
  }
  if (strcmp(varName, "$HEIGHT") == 0) {
    char* str = new char[10];
    sprintf(str, "%d", height());
    return str;
  }
  if (strcmp(varName, "$APPLETWIDTH") == 0) {
    char* str = new char[10];
    sprintf(str, "%d", width());
    return str;
  }
  if (strcmp(varName, "$APPLETHEIGHT") == 0) {
    char* str = new char[10];
    sprintf(str, "%d", height() + 32);
    return str;
  }
  if (strcmp(varName, "$DESKTOP") == 0) {
    return rfb::strDup(server->getName());
  }
  if (strcmp(varName, "$DISPLAY") == 0) {
    struct utsname uts;
    uname(&uts);
    char* str = new char[256];
    strncat(str, uts.nodename, 240);
    strcat(str, ":");
    strncat(str, display, 10);
    return str;
  }
  if (strcmp(varName, "$USER") == 0) {
    struct passwd* user = getpwuid(getuid());
    return rfb::strDup(user ? user->pw_name : "?");
  }
  return 0;
}

rfb::VNCServerST::queryResult
XserverDesktop::queryConnection(network::Socket* sock,
                                const char* userName,
                                char** reason) {
  if (queryConnectId) {
    *reason = strDup("Another connection is currently being queried.");
    return rfb::VNCServerST::REJECT;
  }
  queryConnectAddress.replaceBuf(sock->getPeerAddress());
  if (!userName)
    userName = "(anonymous)";
  queryConnectUsername.replaceBuf(strDup(userName));
  queryConnectId = sock;
  vncQueryConnect(this, sock);
  return rfb::VNCServerST::PENDING;
}


void XserverDesktop::setColormap(ColormapPtr cmap_)
{
  if (cmap != cmap_) {
    cmap = cmap_;
    setColourMapEntries(0, 0);
  }
}

void XserverDesktop::setColourMapEntries(ColormapPtr pColormap, int ndef,
                                         xColorItem* pdef)
{
  if (cmap != pColormap || ndef <= 0) return;

  int first = pdef[0].pixel;
  int n = 1;

  for (int i = 1; i < ndef; i++) {
    if (first + n == pdef[i].pixel) {
      n++;
    } else {
      setColourMapEntries(first, n);
      first = pdef[i].pixel;
      n = 1;
    }
  }
  setColourMapEntries(first, n);
}

void XserverDesktop::setColourMapEntries(int firstColour, int nColours)
{
  try {
    server->setColourMapEntries(firstColour, nColours);
  } catch (rdr::Exception& e) {
    vlog.error("XserverDesktop::setColourMapEntries: %s",e.str());
  }
}

void XserverDesktop::bell()
{
  server->bell();
}

void XserverDesktop::serverCutText(const char* str, int len)
{
  try {
    server->serverCutText(str, len);
  } catch (rdr::Exception& e) {
    vlog.error("XserverDesktop::serverCutText: %s",e.str());
  }
}

void XserverDesktop::setCursor(CursorPtr cursor)
{
  try {
    int w = cursor->bits->width;
    int h = cursor->bits->height;
    rdr::U8* cursorData = new rdr::U8[w * h * (getPF().bpp / 8)];

    xColorItem fg, bg;
    fg.red   = cursor->foreRed;
    fg.green = cursor->foreGreen;
    fg.blue  = cursor->foreBlue;
    FakeAllocColor(cmap, &fg);
    bg.red   = cursor->backRed;
    bg.green = cursor->backGreen;
    bg.blue  = cursor->backBlue;
    FakeAllocColor(cmap, &bg);
    FakeFreeColor(cmap, fg.pixel);
    FakeFreeColor(cmap, bg.pixel);

    int xMaskBytesPerRow = BitmapBytePad(w);

    for (int y = 0; y < h; y++) {
      for (int x = 0; x < w; x++) {
        int byte = y * xMaskBytesPerRow + x / 8;
#if (BITMAP_BIT_ORDER == MSBFirst)
        int bit = 7 - x % 8;
#else
        int bit = x % 8;
#endif
        switch (getPF().bpp) {
        case 8:
          ((rdr::U8*)cursorData)[y * w + x]
            = (cursor->bits->source[byte] & (1 << bit)) ? fg.pixel : bg.pixel;
          break;
        case 16:
          ((rdr::U16*)cursorData)[y * w + x]
            = (cursor->bits->source[byte] & (1 << bit)) ? fg.pixel : bg.pixel;
          break;
        case 32:
          ((rdr::U32*)cursorData)[y * w + x]
            = (cursor->bits->source[byte] & (1 << bit)) ? fg.pixel : bg.pixel;
          break;