[Qemu-devel] [PATCH 6/7] QMP: Introduce QMP disconnect event

[Luiz Capitulino]

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

Note that if any kind of authentication is enabled, this
event is only emitted if the disconnection happens after
the client has been authenticated.

For example:

{ "event": "VNC_DISCONNECT",
    "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 <address@hidden>
---
 monitor.c |    3 +++
 monitor.h |    1 +
 vnc.c     |   28 ++++++++++++++++++++++++++--
 3 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/monitor.c b/monitor.c
index 7536c1e..78fd33a 100644
--- a/monitor.c
+++ b/monitor.c
@@ -357,6 +357,9 @@ void monitor_protocol_event(MonitorEvent event, QObject 
*data)
         case QEVENT_STOP:
             event_name = "STOP";
             break;
+        case QEVENT_VNC_DISCONNECT:
+            event_name = "VNC_DISCONNECT";
+            break;
         default:
             abort();
             break;
diff --git a/monitor.h b/monitor.h
index 6ed117a..e836dd6 100644
--- a/monitor.h
+++ b/monitor.h
@@ -20,6 +20,7 @@ typedef enum MonitorEvent {
     QEVENT_RESET,
     QEVENT_POWERDOWN,
     QEVENT_STOP,
+    QEVENT_VNC_DISCONNECT,
     QEVENT_MAX,
 } MonitorEvent;
 
diff --git a/vnc.c b/vnc.c
index f340d08..f2f0ef3 100644
--- a/vnc.c
+++ b/vnc.c
@@ -1068,6 +1068,29 @@ static void vnc_disconnect_start(VncState *vs)
     vs->csock = -1;
 }
 
+static void vnc_qmp_event(VncState *vs, MonitorEvent event)
+{
+    QDict *server;
+    QObject *data;
+
+    if (!vs->info) {
+        return;
+    }
+
+    server = qdict_new();
+    if (vnc_server_info_put(server) < 0) {
+        QDECREF(server);
+        return;
+    }
+
+    data = qobject_from_jsonf("{ 'client': %p, 'server': %p }",
+                              vs->info, QOBJECT(server));
+
+    monitor_protocol_event(event, data);
+
+    qobject_decref(data); /* will also free 'vs->info' */
+}
+
 static void vnc_disconnect_finish(VncState *vs)
 {
     if (vs->input.buffer) {
@@ -1078,6 +1101,9 @@ static void vnc_disconnect_finish(VncState *vs)
         qemu_free(vs->output.buffer);
         vs->output.buffer = NULL;
     }
+
+    vnc_qmp_event(vs, QEVENT_VNC_DISCONNECT);
+
 #ifdef CONFIG_VNC_TLS
     vnc_tls_client_cleanup(vs);
 #endif /* CONFIG_VNC_TLS */
@@ -1100,8 +1126,6 @@ static void vnc_disconnect_finish(VncState *vs)
     if (!vs->vd->clients)
         dcl->idle = 1;
 
-    qobject_decref(vs->info);
-
     vnc_remove_timer(vs->vd);
     qemu_free(vs);
 }
-- 
1.6.6