qapi/monitor: refactor set/expire_password with enums

'protocol' and 'connected' are better suited as enums than as strings,
make use of that. No functional change intended.

Suggested-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
[FE: update "Since: " from 6.2 to 7.0
     put 'keep' first in enum to ease use as a default]
Signed-off-by: Fabian Ebner <f.ebner@proxmox.com>
Message-Id: <20220225084949.35746-3-f.ebner@proxmox.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c
index 8c384dc..ff78741 100644
--- a/monitor/hmp-cmds.c
+++ b/monitor/hmp-cmds.c
@@ -1398,8 +1398,24 @@
     const char *password  = qdict_get_str(qdict, "password");
     const char *connected = qdict_get_try_str(qdict, "connected");
     Error *err = NULL;
+    DisplayProtocol proto;
+    SetPasswordAction conn;
 
-    qmp_set_password(protocol, password, !!connected, connected, &err);
+    proto = qapi_enum_parse(&DisplayProtocol_lookup, protocol,
+                            DISPLAY_PROTOCOL_VNC, &err);
+    if (err) {
+        goto out;
+    }
+
+    conn = qapi_enum_parse(&SetPasswordAction_lookup, connected,
+                           SET_PASSWORD_ACTION_KEEP, &err);
+    if (err) {
+        goto out;
+    }
+
+    qmp_set_password(proto, password, !!connected, conn, &err);
+
+out:
     hmp_handle_error(mon, err);
 }
 
@@ -1408,8 +1424,17 @@
     const char *protocol  = qdict_get_str(qdict, "protocol");
     const char *whenstr = qdict_get_str(qdict, "time");
     Error *err = NULL;
+    DisplayProtocol proto;
 
-    qmp_expire_password(protocol, whenstr, &err);
+    proto = qapi_enum_parse(&DisplayProtocol_lookup, protocol,
+                            DISPLAY_PROTOCOL_VNC, &err);
+    if (err) {
+        goto out;
+    }
+
+    qmp_expire_password(proto, whenstr, &err);
+
+out:
     hmp_handle_error(mon, err);
 }