[PATCH] Xi: prohibit multiple XIQueryVersion requests with different versions

[Peter Hutterer]

Return BadValue if major or minor differs on the second call.

Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
---
 Xi/xiqueryversion.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/Xi/xiqueryversion.c b/Xi/xiqueryversion.c
index a940614..befa383 100644
--- a/Xi/xiqueryversion.c
+++ b/Xi/xiqueryversion.c
@@ -71,6 +71,15 @@ ProcXIQueryVersion(ClientPtr client)
 
     pXIClient = dixLookupPrivate(&client->devPrivates, XIClientPrivateKey);
 
+    if (pXIClient->major_version &&
+           (stuff->major_version != pXIClient->major_version ||
+            stuff->minor_version != pXIClient->minor_version))
+    {
+        client->errorValue = stuff->major_version;
+        return BadValue;
+    }
+
+
     if (version_compare(XIVersion.major_version, XIVersion.minor_version,
                         stuff->major_version, stuff->minor_version) > 0)
     {
-- 
1.7.7.6