Add SPICE support to add_client monitor command

With the acceptance of some new APIs to libspice-server.so it
is possible to add support for SPICE to the 'add_client'
monitor command, bringing parity with VNC. Since SPICE can
use TLS or plain connections, the command also gains a new
'tls' parameter to specify whether TLS should be attempted
on the injected client sockets.

This new feature is only enabled if building against a
libspice-server >= 0.10.1

* qmp-commands.hx: Add 'tls' parameter & missing doc for
  'skipauth' parameter
* monitor.c: Wire up SPICE for 'add_client' command
* ui/qemu-spice.h, ui/spice-core.c: Add qemu_spice_display_add_client
  API to wire up from monitor

[1] http://cgit.freedesktop.org/spice/spice/commit/server/spice.h?id=d55b68b6b44f2499278fa860fb47ff22f5011faa
    http://cgit.freedesktop.org/spice/spice/commit/server/spice.h?id=bd07dde530d9504e1cfe7ed5837fc00c26f36716

Changes in v3:
 - Added 'optional' flag to new parameters documented
 - Added no-op impl of qemu_spice_display_add_client when
   SPICE is disabled during build

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/monitor.c b/monitor.c
index aadbdcb..0d4daad 100644
--- a/monitor.c
+++ b/monitor.c
@@ -823,13 +823,18 @@ static int add_graphics_client(Monitor *mon, const QDict *qdict, QObject **ret_d
     CharDriverState *s;
 
     if (strcmp(protocol, "spice") == 0) {
+        int fd = monitor_get_fd(mon, fdname);
+        int skipauth = qdict_get_try_bool(qdict, "skipauth", 0);
+        int tls = qdict_get_try_bool(qdict, "tls", 0);
         if (!using_spice) {
             /* correct one? spice isn't a device ,,, */
             qerror_report(QERR_DEVICE_NOT_ACTIVE, "spice");
             return -1;
         }
-	qerror_report(QERR_ADD_CLIENT_FAILED);
-	return -1;
+        if (qemu_spice_display_add_client(fd, skipauth, tls) < 0) {
+            close(fd);
+        }
+        return 0;
 #ifdef CONFIG_VNC
     } else if (strcmp(protocol, "vnc") == 0) {
 	int fd = monitor_get_fd(mon, fdname);