[Qemu-devel] [PATCH v3] hmp: Update info vnc

[Qemu-devel] [PATCH v3] hmp: Update info vnc

[Dr. David Alan Gilbert (git)]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

The QMP query-vnc interfaces have gained a lot more information that
the HMP interfaces hasn't got yet. Update it.

Note the output format has changed, but this is HMP so that's OK.

In particular, this now includes client information for reverse
connections:

-vnc :0
(qemu) info vnc
default:
  Server: 0.0.0.0:5900 (ipv4)
    Auth: none (Sub: none)

  (Now connect a client)

(qemu) info vnc
default:
  Server: 0.0.0.0:5900 (ipv4)
    Auth: none (Sub: none)
  Client: 127.0.0.1:51828 (ipv4)
    x509_dname: none
    sasl_username: none

-vnc localhost:7000,reverse
(qemu) info vnc
default:
  Client: ::1:7000 (ipv6)
    x509_dname: none
    sasl_username: none
  Auth: none (Sub: none)

-vnc :1,password,id=pass -vnc localhost:7000,reverse
(qemu) info vnc
default:
  Client: ::1:7000 (ipv6)
    x509_dname: none
    sasl_username: none
  Auth: none (Sub: none)
rev:
  Server: 0.0.0.0:5901 (ipv4)
    Auth: vnc (Sub: none)
  Client: 127.0.0.1:53616 (ipv4)
    x509_dname: none
    sasl_username: none

This was originally RH bz 1461682

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

--
v3
  Typo 'euth'->'auth' - from Markus' comment
  Use qapi casting functions - from Markus' comment

v2
  Say 'sasl_username' - from Marc-André's comment
  use 'has_x509_dname' - from Marc-André's comment
  Don't display top level auth info except in reverse
  case - Dan's comment
---
 hmp.c | 104 ++++++++++++++++++++++++++++++++++++++++++++++--------------------
 1 file changed, 73 insertions(+), 31 deletions(-)

diff --git a/hmp.c b/hmp.c
index dee40284c1..3e1e766593 100644
--- a/hmp.c
+++ b/hmp.c
@@ -600,50 +600,92 @@ void hmp_info_blockstats(Monitor *mon, const QDict *qdict)
     qapi_free_BlockStatsList(stats_list);
 }
 
+/* Helper for hmp_info_vnc_clients, _servers */
+static void hmp_info_VncBasicInfo(Monitor *mon, VncBasicInfo *info,
+                                  const char *name)
+{
+    monitor_printf(mon, "  %s: %s:%s (%s%s)\n",
+                   name,
+                   info->host,
+                   info->service,
+                   NetworkAddressFamily_lookup[info->family],
+                   info->websocket ? " (Websocket)" : "");
+}
+
+/* Helper displaying and auth and crypt info */
+static void hmp_info_vnc_authcrypt(Monitor *mon, const char *indent,
+                                   VncPrimaryAuth auth,
+                                   VncVencryptSubAuth *vencrypt)
+{
+    monitor_printf(mon, "%sAuth: %s (Sub: %s)\n", indent,
+                   VncPrimaryAuth_lookup[auth],
+                   vencrypt ? VncVencryptSubAuth_lookup[*vencrypt] : "none");
+}
+
+static void hmp_info_vnc_clients(Monitor *mon, VncClientInfoList *client)
+{
+    while (client) {
+        VncClientInfo *cinfo = client->value;
+
+        hmp_info_VncBasicInfo(mon, qapi_VncClientInfo_base(cinfo), "Client");
+        monitor_printf(mon, "    x509_dname: %s\n",
+                       cinfo->has_x509_dname ?
+                       cinfo->x509_dname : "none");
+        monitor_printf(mon, "    sasl_username: %s\n",
+                       cinfo->has_sasl_username ?
+                       cinfo->sasl_username : "none");
+
+        client = client->next;
+    }
+}
+
+static void hmp_info_vnc_servers(Monitor *mon, VncServerInfo2List *server)
+{
+    while (server) {
+        VncServerInfo2 *sinfo = server->value;
+        hmp_info_VncBasicInfo(mon, qapi_VncServerInfo2_base(sinfo), "Server");
+        hmp_info_vnc_authcrypt(mon, "    ", sinfo->auth,
+                               sinfo->has_vencrypt ? &sinfo->vencrypt : NULL);
+        server = server->next;
+    }
+}
+
 void hmp_info_vnc(Monitor *mon, const QDict *qdict)
 {
-    VncInfo *info;
+    VncInfo2List *info2l;
     Error *err = NULL;
-    VncClientInfoList *client;
 
-    info = qmp_query_vnc(&err);
+    info2l = qmp_query_vnc_servers(&err);
     if (err) {
         error_report_err(err);
         return;
     }
-
-    if (!info->enabled) {
-        monitor_printf(mon, "Server: disabled\n");
-        goto out;
-    }
-
-    monitor_printf(mon, "Server:\n");
-    if (info->has_host && info->has_service) {
-        monitor_printf(mon, "     address: %s:%s\n", info->host, info->service);
-    }
-    if (info->has_auth) {
-        monitor_printf(mon, "        auth: %s\n", info->auth);
+    if (!info2l) {
+        monitor_printf(mon, "None\n");
+        return;
     }
 
-    if (!info->has_clients || info->clients == NULL) {
-        monitor_printf(mon, "Client: none\n");
-    } else {
-        for (client = info->clients; client; client = client->next) {
-            monitor_printf(mon, "Client:\n");
-            monitor_printf(mon, "     address: %s:%s\n",
-                           client->value->host,
-                           client->value->service);
-            monitor_printf(mon, "  x509_dname: %s\n",
-                           client->value->x509_dname ?
-                           client->value->x509_dname : "none");
-            monitor_printf(mon, "    username: %s\n",
-                           client->value->has_sasl_username ?
-                           client->value->sasl_username : "none");
+    while (info2l) {
+        VncInfo2 *info = info2l->value;
+        monitor_printf(mon, "%s:\n", info->id);
+        hmp_info_vnc_servers(mon, info->server);
+        hmp_info_vnc_clients(mon, info->clients);
+        if (!info->server) {
+            /* The server entry displays its auth, we only
+             * need to display in the case of 'reverse' connections
+             * where there's no server.
+             */
+            hmp_info_vnc_authcrypt(mon, "  ", info->auth,
+                               info->has_vencrypt ? &info->vencrypt : NULL);
         }
+        if (info->has_display) {
+            monitor_printf(mon, "  Display: %s\n", info->display);
+        }
+        info2l = info2l->next;
     }
 
-out:
-    qapi_free_VncInfo(info);
+    qapi_free_VncInfo2List(info2l);
+
 }
 
 #ifdef CONFIG_SPICE
-- 
2.13.0

Re: [Qemu-devel] [PATCH v3] hmp: Update info vnc

[Markus Armbruster]

"Dr. David Alan Gilbert (git)" <dgilbert@redhat.com> writes:

> From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
>
> The QMP query-vnc interfaces have gained a lot more information that
> the HMP interfaces hasn't got yet. Update it.
>
> Note the output format has changed, but this is HMP so that's OK.
>
> In particular, this now includes client information for reverse
> connections:
>
> -vnc :0
> (qemu) info vnc
> default:
>   Server: 0.0.0.0:5900 (ipv4)
>     Auth: none (Sub: none)
>
>   (Now connect a client)
>
> (qemu) info vnc
> default:
>   Server: 0.0.0.0:5900 (ipv4)
>     Auth: none (Sub: none)
>   Client: 127.0.0.1:51828 (ipv4)
>     x509_dname: none
>     sasl_username: none
>
> -vnc localhost:7000,reverse
> (qemu) info vnc
> default:
>   Client: ::1:7000 (ipv6)
>     x509_dname: none
>     sasl_username: none
>   Auth: none (Sub: none)
>
> -vnc :1,password,id=pass -vnc localhost:7000,reverse
> (qemu) info vnc
> default:
>   Client: ::1:7000 (ipv6)
>     x509_dname: none
>     sasl_username: none
>   Auth: none (Sub: none)
> rev:
>   Server: 0.0.0.0:5901 (ipv4)
>     Auth: vnc (Sub: none)
>   Client: 127.0.0.1:53616 (ipv4)
>     x509_dname: none
>     sasl_username: none
>
> This was originally RH bz 1461682
>
> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

Reviewed-by: Markus Armbruster <armbru@redhat.com>