QMP: Introduce VNC_DISCONNECTED event

It's emitted when a VNC client disconnects from QEMU, client's
information such as port and IP address are provided.

Event example:

{ "event": "VNC_DISCONNECTED",
    "timestamp": { "seconds": 1262976601, "microseconds": 975795 },
    "data": {
        "server": { "auth": "sasl", "family": "ipv4",
                    "service": "5901", "host": "0.0.0.0" },
        "client": { "family": "ipv4", "service": "58425",
                    "host": "127.0.0.1", "sasl_username": "foo" } } }

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/vnc.c b/vnc.c
index 6d488e52c..a590bb9c8 100644
--- a/vnc.c
+++ b/vnc.c
@@ -1108,6 +1108,8 @@ static void vnc_disconnect_start(VncState *vs)
 
 static void vnc_disconnect_finish(VncState *vs)
 {
+    vnc_qmp_event(vs, QEVENT_VNC_DISCONNECTED);
+
     if (vs->input.buffer) {
         qemu_free(vs->input.buffer);
         vs->input.buffer = NULL;