[Spice-devel] [PATCH] Add SPICE support to add_client monitor command

[Daniel P. Berrange]

From: "Daniel P. Berrange" <berrange at redhat.com>

With the proposal of some new APIs[1] 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.

NB1, since there is no SPICE release with these APIs, I
have guessed the next SPICE version number in the #ifdef
to be 0x000a00 (ie 0.10.0 in hex).

NB2, obviously this should only be merged once the SPICE
developers have accepted my proposed patches to libspice-server.so

* 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://lists.freedesktop.org/archives/spice-devel/2011-October/005834.html

Signed-off-by: Daniel P. Berrange <berrange at redhat.com>
---
 monitor.c       |    9 +++++++--
 qmp-commands.hx |    6 ++++--
 ui/qemu-spice.h |    1 +
 ui/spice-core.c |   13 +++++++++++++
 4 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/monitor.c b/monitor.c
index 31b212a..cae3b12 100644
--- a/monitor.c
+++ b/monitor.c
@@ -1120,13 +1120,18 @@ 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);
diff --git a/qmp-commands.hx b/qmp-commands.hx
index ea96191..de1ada3 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -911,8 +911,8 @@ EQMP
 
     {
         .name       = "add_client",
-        .args_type  = "protocol:s,fdname:s,skipauth:b?",
-        .params     = "protocol fdname skipauth",
+        .args_type  = "protocol:s,fdname:s,skipauth:b?,tls:b?",
+        .params     = "protocol fdname skipauth tls",
         .help       = "add a graphics client",
         .user_print = monitor_user_noop,
         .mhandler.cmd_new = add_graphics_client,
@@ -928,6 +928,8 @@ Arguments:
 
 - "protocol": protocol name (json-string)
 - "fdname": file descriptor name (json-string)
+- "skipauth": whether to skip authentication (json-bool)
+- "tls": whether to perform TLS (json-bool)
 
 Example:
 
diff --git a/ui/qemu-spice.h b/ui/qemu-spice.h
index f34be69..a0e213c 100644
--- a/ui/qemu-spice.h
+++ b/ui/qemu-spice.h
@@ -32,6 +32,7 @@ void qemu_spice_init(void);
 void qemu_spice_input_init(void);
 void qemu_spice_audio_init(void);
 void qemu_spice_display_init(DisplayState *ds);
+int qemu_spice_display_add_client(int csock, int skipauth, int tls);
 int qemu_spice_add_interface(SpiceBaseInstance *sin);
 int qemu_spice_set_passwd(const char *passwd,
                           bool fail_if_connected, bool disconnect_if_connected);
diff --git a/ui/spice-core.c b/ui/spice-core.c
index 3cbc721..854670e 100644
--- a/ui/spice-core.c
+++ b/ui/spice-core.c
@@ -712,6 +712,19 @@ int qemu_spice_set_pw_expire(time_t expires)
     return qemu_spice_set_ticket(false, false);
 }
 
+int qemu_spice_display_add_client(int csock, int skipauth, int tls)
+{
+#if SPICE_SERVER_VERSION >= 0x000a00
+    if (tls) {
+        return spice_server_add_ssl_client(spice_server, csock, skipauth);
+    } else {
+        return spice_server_add_client(spice_server, csock, skipauth);
+    }
+#else
+    return -1;
+#endif
+}
+
 static void spice_register_config(void)
 {
     qemu_add_opts(&qemu_spice_opts);
-- 
1.7.6.4