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Date:   Thu,  8 Jul 2021 14:23:10 +0800
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Message-Id: <20210708142059.Bluez.v1.10.I00fd6c348e4c93501de6de0eae0d23436fd3895b@changeid>
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Subject: [Bluez PATCH v1 10/14] plugins/admin_policy: add ServiceAllowList property
From:   Howard Chung <howardchung@google.com>
To:     linux-bluetooth@vger.kernel.org, luiz.dentz@gmail.com
Cc:     Yun-Hao Chung <howardchung@chromium.org>,
        Miao-chen Chou <mcchou@chromium.org>
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Precedence: bulk

From: Yun-Hao Chung <howardchung@chromium.org>

This adds code to register interface org.bluez.AdminPolicyStatus.
The interface will provide read-only properties to indicate the current
settings of admin policies. We separate this from AdminPolicySet so that
normal clients can check current policy settings while only a few
clients can change policies.

This patch also adds readonly property ServiceAllowlist to
AdminPolicyStatus1, which indicates the current setting of service
allowlist.

Reviewed-by: Miao-chen Chou <mcchou@chromium.org>
---
The following test steps were performed:
1. Set ServiceAllowList to ["1124","180A","180F","1812"]
2. Verify ServiceAllowList is ["1124","180A","180F","1812"] in UUID-128
   form
3. Set ServiceAllowList to []
4. Verify ServiceAllowList is []

 plugins/admin_policy.c | 57 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)

diff --git a/plugins/admin_policy.c b/plugins/admin_policy.c
index 242b8d5dacb0..c5ad31f761d9 100644
--- a/plugins/admin_policy.c
+++ b/plugins/admin_policy.c
@@ -27,6 +27,7 @@
 #include "src/shared/queue.h"
 
 #define ADMIN_POLICY_SET_INTERFACE	"org.bluez.AdminPolicySet1"
+#define ADMIN_POLICY_STATUS_INTERFACE	"org.bluez.AdminPolicyStatus1"
 
 static DBusConnection *dbus_conn;
 
@@ -151,6 +152,10 @@ static DBusMessage *set_service_allowlist(DBusConnection *conn,
 		return btd_error_failed(msg, "service_allowlist_set failed");
 	}
 
+	g_dbus_emit_property_changed(dbus_conn,
+				adapter_get_path(policy_data->adapter),
+				ADMIN_POLICY_SET_INTERFACE, "ServiceAllowList");
+
 	return dbus_message_new_method_return(msg);
 }
 
@@ -160,6 +165,43 @@ static const GDBusMethodTable admin_policy_adapter_methods[] = {
 	{ }
 };
 
+void append_service_uuid(void *data, void *user_data)
+{
+	bt_uuid_t *uuid = data;
+	DBusMessageIter *entry = user_data;
+	char uuid_str[MAX_LEN_UUID_STR];
+	const char *uuid_str_ptr = uuid_str;
+
+	if (!uuid) {
+		error("Unexpected NULL uuid data in service_allowlist");
+		return;
+	}
+
+	bt_uuid_to_string(uuid, uuid_str, MAX_LEN_UUID_STR);
+	dbus_message_iter_append_basic(entry, DBUS_TYPE_STRING, &uuid_str_ptr);
+}
+
+static gboolean property_get_service_allowlist(
+					const GDBusPropertyTable *property,
+					DBusMessageIter *iter, void *user_data)
+{
+	struct btd_admin_policy *admin_policy = user_data;
+	DBusMessageIter entry;
+
+	dbus_message_iter_open_container(iter, DBUS_TYPE_ARRAY,
+					DBUS_TYPE_STRING_AS_STRING, &entry);
+	queue_foreach(admin_policy->service_allowlist, append_service_uuid,
+									&entry);
+	dbus_message_iter_close_container(iter, &entry);
+
+	return TRUE;
+}
+
+static const GDBusPropertyTable admin_policy_adapter_properties[] = {
+	{ "ServiceAllowList", "as", property_get_service_allowlist },
+	{ }
+};
+
 static int admin_policy_adapter_probe(struct btd_adapter *adapter)
 {
 	if (policy_data) {
@@ -185,6 +227,21 @@ static int admin_policy_adapter_probe(struct btd_adapter *adapter)
 
 	btd_info(policy_data->adapter_id,
 				"Admin Policy Set interface registered");
+
+	if (!g_dbus_register_interface(dbus_conn, adapter_get_path(adapter),
+					ADMIN_POLICY_STATUS_INTERFACE,
+					NULL, NULL,
+					admin_policy_adapter_properties,
+					policy_data, admin_policy_free)) {
+		btd_error(policy_data->adapter_id,
+			"Admin Policy Status interface init failed on path %s",
+						adapter_get_path(adapter));
+		return -EINVAL;
+	}
+
+	btd_info(policy_data->adapter_id,
+				"Admin Policy Status interface registered");
+
 	return 0;
 }
 
-- 
2.32.0.93.g670b81a890-goog