+static void vmc_state(SpiceCharDeviceInstance *sin, int connected)
+{
+ SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin);
+
+#if SPICE_SERVER_VERSION < 0x000901
+ /*
+ * spice-server calls the state callback for the agent channel when the
+ * spice client connects / disconnects. Given that not the client but
+ * the server is doing the parsing of the messages this is wrong as the
+ * server is still listening. Worse, this causes the parser in the server
+ * to go out of sync, so we ignore state calls for subtype vdagent
+ * spicevmc chardevs. For the full story see:
+ * http://lists.freedesktop.org/archives/spice-devel/2011-July/004837.html
+ */
+ if (strcmp(sin->subtype, "vdagent") == 0) {
+ return;
+ }
+#endif
+
+ if ((scd->chr->opened && connected) ||
+ (!scd->chr->opened && !connected)) {
+ return;
+ }
+
+ qemu_chr_be_event(scd->chr,
+ connected ? CHR_EVENT_OPENED : CHR_EVENT_CLOSED);
+}
+