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vnc: don't send invalid screen updates. 

Don't send updates for screen areas which are outside the clients
desktop.  May happed with vnc clients which don't support the desktop
resize message.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Gerd Hoffmann 2010-05-25 18:25:19 +02:00 committed by Anthony Liguori
parent 5862d195f9
commit 847ce6a185
1 changed files with 6 additions and 2 deletions
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8
vnc.c
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@ -851,6 +851,7 @@ static int vnc_update_client(VncState *vs, int has_dirty)
int y;
int n_rectangles;
int saved_offset;
int width, height;
int n;
if (vs->output.offset && !vs->audio_cap && !vs->force_update)
@ -872,10 +873,13 @@ static int vnc_update_client(VncState *vs, int has_dirty)
saved_offset = vs->output.offset;
vnc_write_u16(vs, 0);
for (y = 0; y < vd->server->height; y++) {
width = MIN(vd->server->width, vs->client_width);
height = MIN(vd->server->height, vs->client_height);
for (y = 0; y < height; y++) {
int x;
int last_x = -1;
for (x = 0; x < vd->server->width / 16; x++) {
for (x = 0; x < width / 16; x++) {
if (vnc_get_bit(vs->dirty[y], x)) {
if (last_x == -1) {
last_x = x;