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700 lines
17 KiB
700 lines
17 KiB
/* -- xwrappers.c -- */
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#include "x11vnc.h"
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#include "xrecord.h"
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#include "keyboard.h"
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int xshm_present = 0;
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int xtest_present = 0;
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int xtrap_present = 0;
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int xrecord_present = 0;
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int xkb_present = 0;
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int xinerama_present = 0;
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int keycode_state[256];
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int rootshift = 0;
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int clipshift = 0;
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int guess_bits_per_color(int bits_per_pixel);
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Status XShmGetImage_wr(Display *disp, Drawable d, XImage *image, int x, int y,
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unsigned long mask);
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XImage *XShmCreateImage_wr(Display* disp, Visual* vis, unsigned int depth,
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int format, char* data, XShmSegmentInfo* shminfo, unsigned int width,
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unsigned int height);
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Status XShmAttach_wr(Display *disp, XShmSegmentInfo *shminfo);
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Status XShmDetach_wr(Display *disp, XShmSegmentInfo *shminfo);
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Bool XShmQueryExtension_wr(Display *disp);
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XImage *xreadscreen(Display *disp, Drawable d, int x, int y,
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unsigned int width, unsigned int height, Bool show_cursor);
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XImage *XGetSubImage_wr(Display *disp, Drawable d, int x, int y,
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unsigned int width, unsigned int height, unsigned long plane_mask,
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int format, XImage *dest_image, int dest_x, int dest_y);
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XImage *XGetImage_wr(Display *disp, Drawable d, int x, int y,
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unsigned int width, unsigned int height, unsigned long plane_mask,
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int format);
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XImage *XCreateImage_wr(Display *disp, Visual *visual, unsigned int depth,
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int format, int offset, char *data, unsigned int width,
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unsigned int height, int bitmap_pad, int bytes_per_line);
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void copy_image(XImage *dest, int x, int y, unsigned int w, unsigned int h);
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void init_track_keycode_state(void);
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void XTRAP_FakeKeyEvent_wr(Display* dpy, KeyCode key, Bool down,
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unsigned long delay);
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void XTestFakeKeyEvent_wr(Display* dpy, KeyCode key, Bool down,
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unsigned long delay);
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void XTRAP_FakeButtonEvent_wr(Display* dpy, unsigned int button, Bool is_press,
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unsigned long delay);
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void XTestFakeButtonEvent_wr(Display* dpy, unsigned int button, Bool is_press,
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unsigned long delay);
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void XTRAP_FakeMotionEvent_wr(Display* dpy, int screen, int x, int y,
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unsigned long delay);
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void XTestFakeMotionEvent_wr(Display* dpy, int screen, int x, int y,
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unsigned long delay);
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Bool XTestCompareCurrentCursorWithWindow_wr(Display* dpy, Window w);
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Bool XTestCompareCursorWithWindow_wr(Display* dpy, Window w, Cursor cursor);
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Bool XTestQueryExtension_wr(Display *dpy, int *ev, int *er, int *maj,
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int *min);
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void XTestDiscard_wr(Display *dpy);
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Bool XETrapQueryExtension_wr(Display *dpy, int *ev, int *er, int *op);
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int XTestGrabControl_wr(Display *dpy, Bool impervious);
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int XTRAP_GrabControl_wr(Display *dpy, Bool impervious);
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void disable_grabserver(Display *in_dpy, int change);
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Bool XRecordQueryVersion_wr(Display *dpy, int *maj, int *min);
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static void copy_raw_fb(XImage *dest, int x, int y, unsigned int w, unsigned int h);
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static void upup_downdown_warning(KeyCode key, Bool down);
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/*
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* used in rfbGetScreen and rfbNewFramebuffer: and estimate to the number
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* of bits per color, of course for some visuals, e.g. 565, the number
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* is not the same for each color. This is just a sane default.
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*/
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int guess_bits_per_color(int bits_per_pixel) {
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int bits_per_color;
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/* first guess, spread them "evenly" over R, G, and B */
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bits_per_color = bits_per_pixel/3;
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if (bits_per_color < 1) {
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bits_per_color = 1; /* 1bpp, 2bpp... */
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}
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/* choose safe values for usual cases: */
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if (bits_per_pixel == 8) {
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bits_per_color = 2;
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} else if (bits_per_pixel == 15 || bits_per_pixel == 16) {
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bits_per_color = 5;
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} else if (bits_per_pixel == 24 || bits_per_pixel == 32) {
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bits_per_color = 8;
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}
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return bits_per_color;
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}
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/*
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* Kludge to interpose image gets and limit to a subset rectangle of
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* the rootwin. This is the -sid option trying to work around invisible
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* saveUnders menu, etc, windows. Also -clip option.
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*/
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#define ADJUST_ROOTSHIFT \
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if (rootshift && subwin) { \
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d = rootwin; \
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x += off_x; \
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y += off_y; \
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} \
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if (clipshift) { \
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x += coff_x; \
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y += coff_y; \
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}
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/*
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* Wrappers for Image related X calls
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*/
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Status XShmGetImage_wr(Display *disp, Drawable d, XImage *image, int x, int y,
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unsigned long mask) {
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ADJUST_ROOTSHIFT
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/* Note: the Solaris overlay stuff is all non-shm (using_shm = 0) */
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#if LIBVNCSERVER_HAVE_XSHM
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return XShmGetImage(disp, d, image, x, y, mask);
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#else
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return (Status) 0;
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#endif
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}
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XImage *XShmCreateImage_wr(Display* disp, Visual* vis, unsigned int depth,
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int format, char* data, XShmSegmentInfo* shminfo, unsigned int width,
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unsigned int height) {
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#if LIBVNCSERVER_HAVE_XSHM
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return XShmCreateImage(disp, vis, depth, format, data, shminfo,
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width, height);
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#else
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return (XImage *) 0;
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#endif
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}
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Status XShmAttach_wr(Display *disp, XShmSegmentInfo *shminfo) {
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#if LIBVNCSERVER_HAVE_XSHM
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return XShmAttach(disp, shminfo);
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#else
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return (Status) 0;
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#endif
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}
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Status XShmDetach_wr(Display *disp, XShmSegmentInfo *shminfo) {
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#if LIBVNCSERVER_HAVE_XSHM
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return XShmDetach(disp, shminfo);
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#else
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return (Status) 0;
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#endif
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}
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Bool XShmQueryExtension_wr(Display *disp) {
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#if LIBVNCSERVER_HAVE_XSHM
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return XShmQueryExtension(disp);
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#else
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return False;
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#endif
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}
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/* wrapper for overlay screen reading: */
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XImage *xreadscreen(Display *disp, Drawable d, int x, int y,
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unsigned int width, unsigned int height, Bool show_cursor) {
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#ifdef SOLARIS_OVERLAY
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return XReadScreen(disp, d, x, y, width, height,
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show_cursor);
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#else
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# ifdef IRIX_OVERLAY
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{ unsigned long hints = 0, hints_ret;
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if (show_cursor) hints |= XRD_READ_POINTER;
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return XReadDisplay(disp, d, x, y, width, height,
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hints, &hints_ret);
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}
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# else
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/* unused vars warning: */
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if (disp || d || x || y || width || height || show_cursor) {}
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return NULL;
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# endif
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#endif
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}
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XImage *XGetSubImage_wr(Display *disp, Drawable d, int x, int y,
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unsigned int width, unsigned int height, unsigned long plane_mask,
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int format, XImage *dest_image, int dest_x, int dest_y) {
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ADJUST_ROOTSHIFT
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if (overlay && dest_x == 0 && dest_y == 0) {
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size_t size = dest_image->height * dest_image->bytes_per_line;
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XImage *xi;
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xi = xreadscreen(disp, d, x, y, width, height,
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(Bool) overlay_cursor);
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if (! xi) return NULL;
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/*
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* There is extra overhead from memcpy and free...
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* this is not like the real XGetSubImage(). We hope
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* this significant overhead is still small compared to
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* the time to retrieve the fb data.
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*/
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memcpy(dest_image->data, xi->data, size);
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XDestroyImage(xi);
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return (dest_image);
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}
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return XGetSubImage(disp, d, x, y, width, height, plane_mask,
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format, dest_image, dest_x, dest_y);
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}
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XImage *XGetImage_wr(Display *disp, Drawable d, int x, int y,
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unsigned int width, unsigned int height, unsigned long plane_mask,
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int format) {
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ADJUST_ROOTSHIFT
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if (overlay) {
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return xreadscreen(disp, d, x, y, width, height,
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(Bool) overlay_cursor);
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}
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return XGetImage(disp, d, x, y, width, height, plane_mask, format);
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}
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XImage *XCreateImage_wr(Display *disp, Visual *visual, unsigned int depth,
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int format, int offset, char *data, unsigned int width,
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unsigned int height, int bitmap_pad, int bytes_per_line) {
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/*
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* This is a kludge to get a created XImage to exactly match what
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* XReadScreen returns: we noticed the rgb masks are different
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* from XCreateImage with the high color visual (red mask <->
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* blue mask). Note we read from the root window(!) then free
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* the data.
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*/
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if (raw_fb) { /* raw_fb hack */
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XImage *xi;
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xi = (XImage *) malloc(sizeof(XImage));
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memset(xi, 0, sizeof(XImage));
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xi->depth = depth;
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xi->bits_per_pixel = (depth == 24) ? 32 : depth;
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xi->format = format;
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xi->xoffset = offset;
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xi->data = data;
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xi->width = width;
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xi->height = height;
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xi->bitmap_pad = bitmap_pad;
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xi->bytes_per_line = bytes_per_line ? bytes_per_line :
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xi->width * xi->bits_per_pixel / 8;
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return xi;
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}
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if (overlay) {
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XImage *xi;
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xi = xreadscreen(disp, window, 0, 0, width, height, False);
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if (xi == NULL) {
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return xi;
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}
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if (xi->data != NULL) {
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free(xi->data);
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}
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xi->data = data;
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return xi;
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}
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return XCreateImage(disp, visual, depth, format, offset, data,
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width, height, bitmap_pad, bytes_per_line);
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}
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static void copy_raw_fb(XImage *dest, int x, int y, unsigned int w, unsigned int h) {
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char *src, *dst;
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unsigned int line;
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int pixelsize = bpp/8;
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int bpl = wdpy_x * pixelsize;
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if (clipshift) {
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x += coff_x;
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y += coff_y;
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}
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if (! raw_fb_seek) {
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src = raw_fb_addr + raw_fb_offset + bpl*y + pixelsize*x;
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dst = dest->data;
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for (line = 0; line < h; line++) {
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memcpy(dst, src, w * pixelsize);
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src += bpl;
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dst += dest->bytes_per_line;
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}
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} else{
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int n, len, del, sz = w * pixelsize;
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off_t off = (off_t) (raw_fb_offset + bpl*y + pixelsize*x);
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lseek(raw_fb_fd, off, SEEK_SET);
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dst = dest->data;
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for (line = 0; line < h; line++) {
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len = sz;
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del = 0;
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while (len > 0) {
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n = read(raw_fb_fd, dst + del, len);
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if (n > 0) {
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del += n;
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len -= n;
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} else if (n == 0) {
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break;
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} else {
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/* overkill... */
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if (errno != EINTR && errno != EAGAIN) {
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break;
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}
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}
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}
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if (bpl > sz) {
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off = (off_t) (bpl - sz);
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lseek(raw_fb_fd, off, SEEK_CUR);
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}
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dst += dest->bytes_per_line;
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}
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}
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}
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void copy_image(XImage *dest, int x, int y, unsigned int w, unsigned int h) {
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/* default (w=0, h=0) is the fill the entire XImage */
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if (w < 1) {
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w = dest->width;
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}
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if (h < 1) {
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h = dest->height;
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}
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if (use_snapfb && snap_fb && dest != snaprect) {
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char *src, *dst;
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unsigned int line;
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int pixelsize = bpp/8;
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src = snap->data + snap->bytes_per_line*y + pixelsize*x;
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dst = dest->data;
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for (line = 0; line < h; line++) {
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memcpy(dst, src, w * pixelsize);
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src += snap->bytes_per_line;
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dst += dest->bytes_per_line;
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}
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} else if (raw_fb) {
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copy_raw_fb(dest, x, y, w, h);
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} else if (using_shm && (int) w == dest->width &&
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(int) h == dest->height) {
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XShmGetImage_wr(dpy, window, dest, x, y, AllPlanes);
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} else {
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XGetSubImage_wr(dpy, window, x, y, w, h, AllPlanes,
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ZPixmap, dest, 0, 0);
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}
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}
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#define DEBUG_SKIPPED_INPUT(dbg, str) \
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if (dbg) { \
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rfbLog("skipped input: %s\n", str); \
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}
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void init_track_keycode_state(void) {
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int i;
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for (i=0; i<256; i++) {
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keycode_state[i] = 0;
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}
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get_keystate(keycode_state);
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}
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static void upup_downdown_warning(KeyCode key, Bool down) {
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if ((down ? 1:0) == keycode_state[(int) key]) {
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rfbLog("XTestFakeKeyEvent: keycode=0x%x \"%s\" is *already* "
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"%s\n", key, XKeysymToString(XKeycodeToKeysym(dpy, key, 0)),
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down ? "down":"up");
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}
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}
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/*
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* wrappers for XTestFakeKeyEvent, etc..
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* also for XTrap equivalents XESimulateXEventRequest
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*/
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void XTRAP_FakeKeyEvent_wr(Display* dpy, KeyCode key, Bool down,
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unsigned long delay) {
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if (! xtrap_present) {
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DEBUG_SKIPPED_INPUT(debug_keyboard, "keyboard: no-XTRAP");
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return;
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}
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/* unused vars warning: */
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if (dpy || key || down || delay) {}
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#if LIBVNCSERVER_HAVE_LIBXTRAP
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XESimulateXEventRequest(trap_ctx, down ? KeyPress : KeyRelease,
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key, 0, 0, 0);
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if (debug_keyboard) {
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upup_downdown_warning(key, down);
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}
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keycode_state[(int) key] = down ? 1 : 0;
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#else
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DEBUG_SKIPPED_INPUT(debug_keyboard, "keyboard: no-XTRAP-build");
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#endif
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}
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void XTestFakeKeyEvent_wr(Display* dpy, KeyCode key, Bool down,
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unsigned long delay) {
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static int first = 1;
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if (debug_keyboard) {
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rfbLog("XTestFakeKeyEvent(dpy, keycode=0x%x \"%s\", %s)\n",
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key, XKeysymToString(XKeycodeToKeysym(dpy, key, 0)),
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down ? "down":"up");
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}
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if (first) {
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init_track_keycode_state();
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first = 0;
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}
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if (down) {
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last_keyboard_keycode = -key;
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} else {
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last_keyboard_keycode = key;
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}
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if (xtrap_input) {
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XTRAP_FakeKeyEvent_wr(dpy, key, down, delay);
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return;
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}
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if (! xtest_present) {
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DEBUG_SKIPPED_INPUT(debug_keyboard, "keyboard: no-XTEST");
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return;
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}
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if (debug_keyboard) {
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rfbLog("calling XTestFakeKeyEvent(%d, %d) %.4f\n",
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key, down, dnow() - x11vnc_start);
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}
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#if LIBVNCSERVER_HAVE_XTEST
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XTestFakeKeyEvent(dpy, key, down, delay);
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if (debug_keyboard) {
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upup_downdown_warning(key, down);
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}
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keycode_state[(int) key] = down ? 1 : 0;
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#endif
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}
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void XTRAP_FakeButtonEvent_wr(Display* dpy, unsigned int button, Bool is_press,
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unsigned long delay) {
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if (! xtrap_present) {
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DEBUG_SKIPPED_INPUT(debug_keyboard, "button: no-XTRAP");
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return;
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}
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/* unused vars warning: */
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if (dpy || button || is_press || delay) {}
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#if LIBVNCSERVER_HAVE_LIBXTRAP
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XESimulateXEventRequest(trap_ctx,
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is_press ? ButtonPress : ButtonRelease, button, 0, 0, 0);
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#else
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DEBUG_SKIPPED_INPUT(debug_keyboard, "button: no-XTRAP-build");
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#endif
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}
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void XTestFakeButtonEvent_wr(Display* dpy, unsigned int button, Bool is_press,
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unsigned long delay) {
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if (xtrap_input) {
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XTRAP_FakeButtonEvent_wr(dpy, button, is_press, delay);
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return;
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}
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if (! xtest_present) {
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DEBUG_SKIPPED_INPUT(debug_keyboard, "button: no-XTEST");
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return;
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}
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if (debug_pointer) {
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rfbLog("calling XTestFakeButtonEvent(%d, %d) %.4f\n",
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button, is_press, dnow() - x11vnc_start);
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}
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#if LIBVNCSERVER_HAVE_XTEST
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XTestFakeButtonEvent(dpy, button, is_press, delay);
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#endif
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}
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void XTRAP_FakeMotionEvent_wr(Display* dpy, int screen, int x, int y,
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unsigned long delay) {
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if (! xtrap_present) {
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DEBUG_SKIPPED_INPUT(debug_keyboard, "motion: no-XTRAP");
|
|
return;
|
|
}
|
|
/* unused vars warning: */
|
|
if (dpy || screen || x || y || delay) {}
|
|
|
|
#if LIBVNCSERVER_HAVE_LIBXTRAP
|
|
XESimulateXEventRequest(trap_ctx, MotionNotify, 0, x, y, 0);
|
|
#else
|
|
DEBUG_SKIPPED_INPUT(debug_keyboard, "motion: no-XTRAP-build");
|
|
#endif
|
|
}
|
|
|
|
void XTestFakeMotionEvent_wr(Display* dpy, int screen, int x, int y,
|
|
unsigned long delay) {
|
|
|
|
if (xtrap_input) {
|
|
XTRAP_FakeMotionEvent_wr(dpy, screen, x, y, delay);
|
|
return;
|
|
}
|
|
|
|
if (debug_pointer) {
|
|
rfbLog("calling XTestFakeMotionEvent(%d, %d) %.4f\n",
|
|
x, y, dnow() - x11vnc_start);
|
|
}
|
|
#if LIBVNCSERVER_HAVE_XTEST
|
|
XTestFakeMotionEvent(dpy, screen, x, y, delay);
|
|
#endif
|
|
}
|
|
|
|
Bool XTestCompareCurrentCursorWithWindow_wr(Display* dpy, Window w) {
|
|
if (! xtest_present) {
|
|
return False;
|
|
}
|
|
#if LIBVNCSERVER_HAVE_XTEST
|
|
return XTestCompareCurrentCursorWithWindow(dpy, w);
|
|
#else
|
|
return False;
|
|
#endif
|
|
}
|
|
|
|
Bool XTestCompareCursorWithWindow_wr(Display* dpy, Window w, Cursor cursor) {
|
|
if (! xtest_present) {
|
|
return False;
|
|
}
|
|
#if LIBVNCSERVER_HAVE_XTEST
|
|
return XTestCompareCursorWithWindow(dpy, w, cursor);
|
|
#else
|
|
return False;
|
|
#endif
|
|
}
|
|
|
|
Bool XTestQueryExtension_wr(Display *dpy, int *ev, int *er, int *maj,
|
|
int *min) {
|
|
#if LIBVNCSERVER_HAVE_XTEST
|
|
return XTestQueryExtension(dpy, ev, er, maj, min);
|
|
#else
|
|
return False;
|
|
#endif
|
|
}
|
|
|
|
void XTestDiscard_wr(Display *dpy) {
|
|
if (! xtest_present) {
|
|
return;
|
|
}
|
|
#if LIBVNCSERVER_HAVE_XTEST
|
|
XTestDiscard(dpy);
|
|
#endif
|
|
}
|
|
|
|
Bool XETrapQueryExtension_wr(Display *dpy, int *ev, int *er, int *op) {
|
|
#if LIBVNCSERVER_HAVE_LIBXTRAP
|
|
return XETrapQueryExtension(dpy, (INT32 *)ev, (INT32 *)er,
|
|
(INT32 *)op);
|
|
#else
|
|
/* unused vars warning: */
|
|
if (dpy || ev || er || op) {}
|
|
return False;
|
|
#endif
|
|
}
|
|
|
|
int XTestGrabControl_wr(Display *dpy, Bool impervious) {
|
|
if (! xtest_present) {
|
|
return 0;
|
|
}
|
|
#if LIBVNCSERVER_HAVE_XTEST && LIBVNCSERVER_HAVE_XTESTGRABCONTROL
|
|
XTestGrabControl(dpy, impervious);
|
|
return 1;
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
int XTRAP_GrabControl_wr(Display *dpy, Bool impervious) {
|
|
if (! xtrap_present) {
|
|
/* unused vars warning: */
|
|
if (dpy || impervious) {}
|
|
return 0;
|
|
}
|
|
#if LIBVNCSERVER_HAVE_LIBXTRAP
|
|
else {
|
|
ReqFlags requests;
|
|
|
|
if (! impervious) {
|
|
if (trap_ctx) {
|
|
XEFreeTC(trap_ctx);
|
|
}
|
|
trap_ctx = NULL;
|
|
return 1;
|
|
}
|
|
|
|
if (! trap_ctx) {
|
|
trap_ctx = XECreateTC(dpy, 0, NULL);
|
|
if (! trap_ctx) {
|
|
rfbLog("DEC-XTRAP XECreateTC failed. Watch "
|
|
"out for XGrabServer from wm's\n");
|
|
return 0;
|
|
}
|
|
XEStartTrapRequest(trap_ctx);
|
|
memset(requests, 0, sizeof(requests));
|
|
BitTrue(requests, X_GrabServer);
|
|
BitTrue(requests, X_UngrabServer);
|
|
XETrapSetRequests(trap_ctx, True, requests);
|
|
XETrapSetGrabServer(trap_ctx, True);
|
|
}
|
|
return 1;
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
void disable_grabserver(Display *in_dpy, int change) {
|
|
int ok = 0;
|
|
static int didmsg = 0;
|
|
|
|
if (debug_grabs) {
|
|
fprintf(stderr, "disable_grabserver/%d %.5f\n",
|
|
xserver_grabbed, dnowx());
|
|
didmsg = 0;
|
|
}
|
|
|
|
if (! xtrap_input) {
|
|
if (XTestGrabControl_wr(in_dpy, True)) {
|
|
if (change) {
|
|
XTRAP_GrabControl_wr(in_dpy, False);
|
|
}
|
|
if (! didmsg) {
|
|
rfbLog("GrabServer control via XTEST.\n");
|
|
didmsg = 1;
|
|
}
|
|
ok = 1;
|
|
} else {
|
|
if (XTRAP_GrabControl_wr(in_dpy, True)) {
|
|
ok = 1;
|
|
if (! didmsg) {
|
|
rfbLog("Using DEC-XTRAP for protection"
|
|
" from XGrabServer.\n");
|
|
didmsg = 1;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
if (XTRAP_GrabControl_wr(in_dpy, True)) {
|
|
if (change) {
|
|
XTestGrabControl_wr(in_dpy, False);
|
|
}
|
|
if (! didmsg) {
|
|
rfbLog("GrabServer control via DEC-XTRAP.\n");
|
|
didmsg = 1;
|
|
}
|
|
ok = 1;
|
|
} else {
|
|
if (XTestGrabControl_wr(in_dpy, True)) {
|
|
ok = 1;
|
|
if (! didmsg) {
|
|
rfbLog("DEC-XTRAP XGrabServer "
|
|
"protection not available, "
|
|
"using XTEST.\n");
|
|
didmsg = 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (! ok && ! didmsg) {
|
|
rfbLog("*********************************************************\n");
|
|
rfbLog("* No XTEST or DEC-XTRAP protection from XGrabServer !!! *\n");
|
|
rfbLog("* DEADLOCK if your window manager calls XGrabServer !!! *\n");
|
|
rfbLog("*********************************************************\n");
|
|
}
|
|
XFlush(in_dpy);
|
|
}
|
|
|
|
Bool XRecordQueryVersion_wr(Display *dpy, int *maj, int *min) {
|
|
#if LIBVNCSERVER_HAVE_RECORD
|
|
return XRecordQueryVersion(dpy, maj, min);
|
|
#else
|
|
return False;
|
|
#endif
|
|
}
|
|
|
|
|