我正在尝试通过 D-Bus/Gio 向 bluez 注册配置文件。当我调用 RegisterProfile 时一切正常。我检查了我的 GError，它是 NULL，我的返回值是一个空的 GVariant。我已经尝试了很多东西，但这是我最新的代码。当我运行它时，它会打印“g_dbus_connection_call_sync successed”，但我无法使用 d-feet 在 D-Bus 中看到我的新配置文件，并且无法使用我的测试设备连接到它。我知道测试设备上的代码可以工作，或者至少可以直接使用 bluez，但我正在尝试弄清楚如何将 bluez 与 D-Bus 结合使用。
这是我的代码 .h 文件:
#ifndef BT_SERVER_H
#define BT_SERVER_H
#include <glib.h>
#include <gio/gio.h>
// ---------------------------------------------------------------------------
class BTProfile
{
public:
BTProfile();
void init();
void destroy();
static void method_call(GDBusConnection *connection,
const gchar *sender, const gchar *object_path,
const gchar *interface_name, const gchar *method_name,
GVariant *parameters, GDBusMethodInvocation *invocation,
gpointer user_data);
static GVariant *get_property(GDBusConnection *connection,
const gchar *sender, const gchar *object_path,
const gchar *interface_name, const gchar *property_name,
GError **error, gpointer user_data);
static gboolean set_property(GDBusConnection *connection,
const gchar *sender, const gchar *object_path,
const gchar *interface_name, const gchar *property_name,
GVariant *value, GError **error, gpointer userData);
protected:
GDBusConnection *bus_connection;
};
这是我的 .cpp 文件:
#include <stdio.h>
#include "bt_server.h"
static const char *serial_service_class_uuid =
"00001101-0000-1000-8000-00805F9B34FB";
static const char *my_service_uuid =
"E62C4DCA-9ABC-11E5-8994-FEFF819CDC9F";
static const gchar btp_introspection_xml[] =
"<node>"
" <interface name='org.bluez.Profile1'>"
" <method name='Release' />"
" <method name='NewConnection'>"
" <arg type='o' name='device' direction='in' />"
" <arg type='h' name='fd' direction='in' />"
" <arg type='a{sv}' name='fd_properties' direction='in' />"
" </method>"
" <method name='RequestDisconnection'>"
" <arg type='o' name='device' direction='in' />"
" </method>"
" </interface>"
"</node>";
static const GDBusInterfaceVTable btp_interface_vtable =
{
BTProfile::method_call,
BTProfile::get_property,
BTProfile::set_property
};
BTProfile::BTProfile() : bus_connection(NULL)
{
}
// ---------------------------------------------------------------------------
void BTProfile::init()
{
GError *error = NULL;
GDBusNodeInfo *introspection = g_dbus_node_info_new_for_xml(
btp_introspection_xml, &error);
if (!error)
{
GDBusInterfaceInfo *interface_info = g_dbus_node_info_lookup_interface(
introspection, "org.bluez.Profile1");
bus_connection = g_bus_get_sync(G_BUS_TYPE_SYSTEM, NULL, &error);
if (!error)
{
g_dbus_connection_register_object(bus_connection,
"/org/bluez/myprofile", interface_info, &btp_interface_vtable,
this, NULL, &error);
if (!error)
{
GVariantBuilder builder;
g_variant_builder_init(&builder, G_VARIANT_TYPE_DICTIONARY);
g_variant_builder_add(&builder, "{sv}", "Name",
g_variant_new("s", "myprofile"));
g_variant_builder_add(&builder, "{sv}", "Service",
g_variant_new("s", serial_service_class_uuid));
g_variant_builder_add(&builder, "{sv}", "Channel",
g_variant_new("q", 1));
g_variant_builder_add(&builder, "{sv}", "RequireAuthentication",
g_variant_new("b", FALSE));
g_variant_builder_add(&builder, "{sv}", "Role",
g_variant_new("s", "client"));
g_variant_builder_add(&builder, "{sv}", "Version",
g_variant_new("q", 1));
g_variant_builder_add(&builder, "{sv}", "AutoConnect",
g_variant_new("b", true));
g_dbus_connection_call_sync(bus_connection, "org.bluez",
"/org/bluez", "org.bluez.ProfileManager1",
"RegisterProfile", g_variant_new("(osa{sv})",
"/org/bluez/myprofile", my_service_uuid, &builder),
NULL, G_DBUS_CALL_FLAGS_NONE, G_MAXINT, NULL, &error);
if (!error)
{
g_print("g_dbus_connection_call_sync succeeded\n");
}
else
{
g_print("g_dbus_connection_call_sync failed: %s\n",
error->message);
g_error_free(error);
}
}
else
{
g_print("g_dbus_connection_register_object failed: %s\n",
error->message);
g_error_free(error);
}
}
else
{
g_print("g_bus_get_sync failed: %s\n", error->message);
g_error_free(error);
}
}
else
{
g_print("g_dbus_node_info_new_for_xml failed: %s\n", error->message);
g_error_free(error);
}
}
// ---------------------------------------------------------------------------
void BTProfile::destroy()
{
if (bus_connection)
{
g_object_unref(bus_connection);
}
}
// ---------------------------------------------------------------------------
void BTProfile::method_call(GDBusConnection *connection, const gchar *sender,
const gchar *object_path, const gchar *interface_name,
const gchar *method_name, GVariant *parameters,
GDBusMethodInvocation *invocation, gpointer user_data)
{
g_print("handle_method_call: called\n");
g_dbus_method_invocation_return_value(invocation, NULL);
}
// ---------------------------------------------------------------------------
GVariant *BTProfile::get_property(GDBusConnection *connection,
const gchar *sender, const gchar *object_path, const gchar *interface_name,
const gchar *property_name, GError **error, gpointer user_data)
{
g_print("get_property: called\n");
return NULL;
}
// ---------------------------------------------------------------------------
gboolean BTProfile::set_property(GDBusConnection *connection,
const gchar *sender, const gchar *object_path, const gchar *interface_name,
const gchar *property_name, GVariant *value, GError **error,
gpointer userData)
{
g_print("set_property: called\n");
return false;
}
看到我如何没有收到错误信息，我有点迷失了。 谢谢大家。
编辑: 经过一番挖掘后，我找到了 dbus bluetooth.conf 文件，这是我的:
<!-- This configuration file specifies the required security policies
for Bluetooth core daemon to work. -->
<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
"http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
<busconfig>
<!-- ../system.conf have denied everything, so we just punch some holes -->
<policy user="root">
<allow own="org.bluez"/>
<allow send_destination="org.bluez"/>
<allow send_interface="org.bluez.Agent1"/>
<allow send_interface="org.bluez.MediaEndpoint1"/>
<allow send_interface="org.bluez.MediaPlayer1"/>
<allow send_interface="org.bluez.ThermometerWatcher1"/>
<allow send_interface="org.bluez.AlertAgent1"/>
<allow send_interface="org.bluez.Profile1"/>
<allow send_interface="org.bluez.HeartRateWatcher1"/>
<allow send_interface="org.bluez.CyclingSpeedWatcher1"/>
<allow send_interface="org.bluez.GattCharacteristic1"/>
<allow send_interface="org.bluez.GattDescriptor1"/>
<allow send_interface="org.bluez.ProfileManager1"/>
<allow send_interface="org.bluez.Device1"/>
<allow send_interface="org.freedesktop.DBus.ObjectManager"/>
<allow send_interface="org.freedesktop.DBus.Properties"/>
</policy>
<policy at_console="true">
<allow send_destination="org.bluez"/>
</policy>
<!-- allow users of lp group (printing subsystem) to
communicate with bluetoothd -->
<policy group="lp">
<allow send_destination="org.bluez"/>
</policy>
<policy context="default">
<deny send_destination="org.bluez"/>
</policy>
</busconfig>
我向其中添加了 ProfileManager1 和 Device1，但仍然没有成功。有谁知道我在这里缺少什么？我可以使用直接 bluez 注册和使用配置文件，所以我知道这是 bluez/dbus 问题。
最佳答案
我相信我已经明白了。无论如何我都可以使用它。经过多次重新阅读示例后，我最终这样做了:
1:拥有一个带有 g_bus_own_name 的总线名称。
2:在 on_bus_acquired 回调中，我使用 GDBusConnection 作为 g_dbus_connection_register_object 的参数(而不是尝试自己创建 GDBusConnection)
3:调用RegisterProfile方法
如果有人感兴趣，我可以发布代码。
现在一切似乎都正常。另一件让我困惑的事情是 RegisterProfile 的参数。我使用 SerialUUID 进行连接，但首先我还将角色参数设置为“服务器”。这导致我的个人资料拒绝连接。我认为该参数仅适用于不同类型的配置文件，但我不确定。有谁确切知道吗？
关于bluetooth - 如何使用 dbus/gio 向 bluez 注册配置文件？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37573014/