From e92316ad3074aaf13bced21f03c98969ca6f73a9 Mon Sep 17 00:00:00 2001
From: "Daniel P. Berrange" <berrange@redhat.com>
Date: Thu, 27 Jul 2017 18:46:40 +0100
Subject: ui: correctly detect spice PAUSE scancode sequence

The SPICE input code is currently detcting 0xe1 0x1d 0x45 as
the PAUSE key make sequence and 0xe1 0x9d 0xc5 as the break
sequence. This is incorrect, because all 6 scancodes together
are the make sequence, and there is no break sequence.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 20170727174640.30359-1-berrange@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 ui/spice-input.c | 32 +++++++++++++-------------------
 1 file changed, 13 insertions(+), 19 deletions(-)

(limited to 'ui')

diff --git a/ui/spice-input.c b/ui/spice-input.c
index cda9976..3d41aa1 100644
--- a/ui/spice-input.c
+++ b/ui/spice-input.c
@@ -50,6 +50,7 @@ static const SpiceKbdInterface kbd_interface = {
 
 static void kbd_push_key(SpiceKbdInstance *sin, uint8_t scancode)
 {
+    static const uint8_t pauseseq[] = { 0xe1, 0x1d, 0x45, 0xe1, 0x9d, 0xc5 };
     QemuSpiceKbd *kbd = container_of(sin, QemuSpiceKbd, sin);
     int keycode;
     bool up;
@@ -58,32 +59,25 @@ static void kbd_push_key(SpiceKbdInstance *sin, uint8_t scancode)
         kbd->emul0 = true;
         return;
     }
-    keycode = scancode & ~SCANCODE_UP;
-    up = scancode & SCANCODE_UP;
-    if (kbd->emul0) {
-        kbd->emul0 = false;
-        keycode |= SCANCODE_GREY;
-    }
 
-    if (scancode == SCANCODE_EMUL1) {
+    if (scancode == pauseseq[kbd->pauseseq]) {
         kbd->pauseseq++;
-        return;
-    } else if (kbd->pauseseq == 1) {
-        if (keycode == 0x1d) {
-            kbd->pauseseq++;
-            return;
-        } else {
-            kbd->pauseseq = 0;
-        }
-    } else if (kbd->pauseseq == 2) {
-        if (keycode == 0x45) {
-            qemu_input_event_send_key_qcode(NULL, Q_KEY_CODE_PAUSE, !up);
+        if (kbd->pauseseq == G_N_ELEMENTS(pauseseq)) {
+            qemu_input_event_send_key_qcode(NULL, Q_KEY_CODE_PAUSE, true);
             kbd->pauseseq = 0;
-            return;
         }
+        return;
+    } else {
         kbd->pauseseq = 0;
     }
 
+    keycode = scancode & ~SCANCODE_UP;
+    up = scancode & SCANCODE_UP;
+    if (kbd->emul0) {
+        kbd->emul0 = false;
+        keycode |= SCANCODE_GREY;
+    }
+
     qemu_input_event_send_key_number(NULL, keycode, !up);
 }
 
-- 
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