Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
List bluetooth controllers using GDBUS (both with and without using proxy)
/*
* hci_list_gdbus.c - List bluetooth controllers using GDBUS
* - The example uses GDBUS to get the list of bluetooth controllers using DBUS
* interfaces provided by bluez
* - If any controller is found, it prints the Name and MAC address of the controller
* gcc `pkg-config --cflags glib-2.0 gio-2.0` -o ./bin/hci_list_gdbus ./hci_list_gdbus.c `pkg-config --libs glib-2.0 gio-2.0`
* dbus-send --system --print-reply --type=method_call --dest='org.bluez' '/' org.freedesktop.DBus.ObjectManager.GetManagedObjects
*/
#include <glib.h>
#include <gio/gio.h>
GDBusConnection *con;
static const gchar* bluez_adapter_get_property(const gchar *path, const char *name)
{
GVariant *result;
GVariant *prop;
GError *error = NULL;
const gchar *address = NULL;
result = g_dbus_connection_call_sync(con,
"org.bluez",
path,
"org.freedesktop.DBus.Properties",
"Get",
g_variant_new("(ss)", "org.bluez.Adapter1", name),
NULL,
G_DBUS_CALL_FLAGS_NONE,
-1,
NULL,
&error);
if(error != NULL)
return NULL;
g_variant_get(result, "(v)", &prop);
g_variant_unref(result);
return g_variant_get_string(prop, NULL);
}
static void bluez_list_controllers(GDBusConnection *con,
GAsyncResult *res,
gpointer data)
{
GVariant *result = NULL;
GMainLoop *loop = NULL;
gchar *s = NULL;
GVariantIter i;
const gchar *object_path;
GVariant *ifaces_and_properties;
loop = (GMainLoop *)data;
result = g_dbus_connection_call_finish(con, res, NULL);
if(result == NULL)
g_print("Unable to get result for GetManagedObjects\n");
/* Parse the result */
if(result) {
result = g_variant_get_child_value(result, 0);
g_variant_iter_init(&i, result);
while(g_variant_iter_next(&i, "{&o@a{sa{sv}}}", &object_path, &ifaces_and_properties)) {
const gchar *interface_name;
GVariant *properties;
GVariantIter ii;
g_variant_iter_init(&ii, ifaces_and_properties);
while(g_variant_iter_next(&ii, "{&s@a{sv}}", &interface_name, &properties)) {
if(g_strstr_len(g_ascii_strdown(interface_name, -1), -1, "adapter"))
g_print("HCI Name: %s Address: %s\n", bluez_adapter_get_property(object_path, "Name"), bluez_adapter_get_property(object_path, "Address"));
g_variant_unref(properties);
}
g_variant_unref(ifaces_and_properties);
}
g_variant_unref(result);
}
g_main_loop_quit(loop);
}
int main(void)
{
GMainLoop *loop;
con = g_bus_get_sync(G_BUS_TYPE_SYSTEM, NULL, NULL);
if(con == NULL) {
g_print("Not able to get connection to system bus\n");
return 1;
}
loop = g_main_loop_new(NULL, FALSE);
g_dbus_connection_call(con,
"org.bluez",
"/",
"org.freedesktop.DBus.ObjectManager",
"GetManagedObjects",
NULL,
G_VARIANT_TYPE("(a{oa{sa{sv}}})"),
G_DBUS_CALL_FLAGS_NONE,
-1,
NULL,
(GAsyncReadyCallback)bluez_list_controllers,
loop);
g_main_loop_run(loop);
g_object_unref(con);
return 0;
}
/*
* hci_list_gdbus_proxy.c - List bluetooth controllers using GDBUS Proxy
* - The example uses GDBUS proxy to get the list of bluetooth controllers using DBUS
* interfaces provided by bluez
* - If any controller is found, it prints the Name and MAC address of the controller
* gcc `pkg-config --cflags glib-2.0 gio-2.0` -o ./bin/hci_list_gdbus_proxy ./hci_list_gdbus_proxy.c `pkg-config --libs glib-2.0 gio-2.0`
* dbus-send --system --print-reply --type=method_call --dest='org.bluez' '/' org.freedesktop.DBus.ObjectManager.GetManagedObjects
*/
#include <glib.h>
#include <gio/gio.h>
GDBusConnection *conn;
static const gchar* bluez_adapter_get_property(const gchar *path, const char *name)
{
GVariant *prop;
GDBusProxy *proxy;
GError *error = NULL;
GVariant *result;
proxy = g_dbus_proxy_new_sync(conn,
G_DBUS_PROXY_FLAGS_NONE,
NULL,
"org.bluez",
path,
"org.freedesktop.DBus.Properties",
NULL,
&error);
if(error != NULL)
return NULL;
error = NULL;
result = g_dbus_proxy_call_sync(proxy,
"Get",
g_variant_new("(ss)", "org.bluez.Adapter1", name),
G_DBUS_CALL_FLAGS_NONE,
-1,
NULL,
&error);
if(error != NULL)
return NULL;
g_variant_get(result, "(v)", &prop);
g_variant_unref(result);
return g_variant_get_string(prop, NULL);
}
int main(void)
{
int rc = 0;
GDBusProxy *proxy;
GError *error = NULL;
GVariant *result;
const gchar *object_path;
GVariant *ifaces_and_properties;
GVariantIter i;
conn = g_bus_get_sync(G_BUS_TYPE_SYSTEM, NULL, &error);
if(error != NULL)
return 1;
proxy = g_dbus_proxy_new_sync(conn,
G_DBUS_PROXY_FLAGS_NONE,
NULL,
"org.bluez",
"/",
"org.freedesktop.DBus.ObjectManager",
NULL,
&error);
if(error != NULL)
return 1;
error = NULL;
result = g_dbus_proxy_call_sync(proxy,
"GetManagedObjects",
NULL,
G_DBUS_CALL_FLAGS_NONE,
-1,
NULL,
&error);
if(error != NULL)
return 1;
/* Parse the result */
if(result) {
result = g_variant_get_child_value(result, 0);
g_variant_iter_init(&i, result);
while(g_variant_iter_next(&i, "{&o@a{sa{sv}}}", &object_path, &ifaces_and_properties)) {
const gchar *interface_name;
GVariant *properties;
GVariantIter ii;
g_variant_iter_init(&ii, ifaces_and_properties);
while(g_variant_iter_next(&ii, "{&s@a{sv}}", &interface_name, &properties)) {
if(g_strstr_len(g_ascii_strdown(interface_name, -1), -1, "adapter"))
g_print("HCI Name: %s Address: %s\n", bluez_adapter_get_property(object_path, "Name"), bluez_adapter_get_property(object_path, "Address"));
g_variant_unref(properties);
}
g_variant_unref(ifaces_and_properties);
}
g_variant_unref(result);
}
fail:
rc = 1;
done:
if(proxy)
g_object_unref(proxy);
if(conn)
g_object_unref(conn);
if(error)
g_error_free(error);
return rc;
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.