我正在写一个简单的代理程序。
我可以配对我的设备，但当我尝试连接（单击连接选项）时，它将失败，并显示以下dbus日志
我们将非常感谢你的帮助。
method call time=1537417845.746765 sender=:1.0 -> destination=:1.25 serial=2824 path=/org/bluez/AutoPinAgent; interface=org.bluez.Agent1; member=AuthorizeService
object path "/org/bluez/hci0/dev_00_00_00_17_55_B8"
string "00001108-0000-1000-8000-00805f9b34fb"
error time=1537417845.749340 sender=:1.25 -> destination=:1.0 error_name=org.freedesktop.DBus.Error.UnknownMethod reply_serial=2824
string "No such interface 'org.bluez.Agent1' on object at path /org/bluez/AutoPinAgent"
最佳答案
如果没有代理的源代码和连接方式，很难做出判断。从日志中可以清楚地看到，当守护进程尝试连接HSP profile的HS（headset）角色时，它通过调用代理的AuthorizeService来请求授权。
从错误回复中，我可以理解您没有在Bluez中正确注册方法/接口。因此，当尝试连接此配置文件时，您需要实现AuthorizeService并授权该服务。
下面是实现Bluez的doc/Agent-api.txt的代理的示例。因此，您需要根据需要在本例中实现AuthorizeService。这个例子只是没有任何特定实现的模板代码。
/*
* gcc `pkg-config --cflags glib-2.0 gio-2.0` -Wall -Wextra -o ./bin/agent ./agent.c `pkg-config --libs glib-2.0 gio-2.0`
*/
#include <glib.h>
#include <gio/gio.h>
#include <stdio.h>
GMainLoop *loop;
GDBusConnection *con;
#define AGENT_PATH "/org/bluez/AutoPinAgent"
static void bluez_agent_method_call(GDBusConnection *conn,
const gchar *sender,
const gchar *path,
const gchar *interface,
const gchar *method,
GVariant *params,
GDBusMethodInvocation *invocation,
void *userdata)
{
int pass;
int entered;
char *opath;
GVariant *p= g_dbus_method_invocation_get_parameters(invocation);
g_print("Agent method call: %s.%s()\n", interface, method);
if(!strcmp(method, "RequestPinCode")) {
;
}
else if(!strcmp(method, "DisplayPinCode")) {
;
}
else if(!strcmp(method, "RequestPasskey")) {
g_print("Getting the Pin from user: ");
fscanf(stdin, "%d", &pass);
g_print("\n");
g_dbus_method_invocation_return_value(invocation, g_variant_new("(u)", pass));
}
else if(!strcmp(method, "DisplayPasskey")) {
g_variant_get(params, "(ouq)", &opath, &pass, &entered);
g_dbus_method_invocation_return_value(invocation, NULL);
}
else if(!strcmp(method, "RequestConfirmation")) {
g_variant_get(params, "(ou)", &opath, &pass);
g_dbus_method_invocation_return_value(invocation, NULL);
}
else if(!strcmp(method, "RequestAuthorization")) {
;
}
else if(!strcmp(method, "AuthorizeService")) {
;
}
else if(!strcmp(method, "Cancel")) {
;
}
else
g_print("We should not come here, unknown method\n");
}
static const GDBusInterfaceVTable agent_method_table = {
.method_call = bluez_agent_method_call,
};
int bluez_register_agent(GDBusConnection *con)
{
GError *error = NULL;
guint id = 0;
GDBusNodeInfo *info = NULL;
static const gchar bluez_agent_introspection_xml[] =
"<node name='/org/bluez/SampleAgent'>"
" <interface name='org.bluez.Agent1'>"
" <method name='Release'>"
" </method>"
" <method name='RequestPinCode'>"
" <arg type='o' name='device' direction='in' />"
" <arg type='s' name='pincode' direction='out' />"
" </method>"
" <method name='DisplayPinCode'>"
" <arg type='o' name='device' direction='in' />"
" <arg type='s' name='pincode' direction='in' />"
" </method>"
" <method name='RequestPasskey'>"
" <arg type='o' name='device' direction='in' />"
" <arg type='u' name='passkey' direction='out' />"
" </method>"
" <method name='DisplayPasskey'>"
" <arg type='o' name='device' direction='in' />"
" <arg type='u' name='passkey' direction='in' />"
" <arg type='q' name='entered' direction='in' />"
" </method>"
" <method name='RequestConfirmation'>"
" <arg type='o' name='device' direction='in' />"
" <arg type='u' name='passkey' direction='in' />"
" </method>"
" <method name='RequestAuthorization'>"
" <arg type='o' name='device' direction='in' />"
" </method>"
" <method name='AuthorizeService'>"
" <arg type='o' name='device' direction='in' />"
" <arg type='s' name='uuid' direction='in' />"
" </method>"
" <method name='Cancel'>"
" </method>"
" </interface>"
"</node>";
info = g_dbus_node_info_new_for_xml(bluez_agent_introspection_xml, &error);
if(error) {
g_printerr("Unable to create node: %s\n", error->message);
g_clear_error(&error);
return 0;
}
id = g_dbus_connection_register_object(con,
AGENT_PATH,
info->interfaces[0],
&agent_method_table,
NULL, NULL, &error);
g_dbus_node_info_unref(info);
//g_dbus_connection_unregister_object(con, id);
/* call register method in AgentManager1 interface */
return id;
}
static int bluez_agent_call_method(const gchar *method, GVariant *param)
{
GVariant *result;
GError *error = NULL;
result = g_dbus_connection_call_sync(con,
"org.bluez",
"/org/bluez",
"org.bluez.AgentManager1",
method,
param,
NULL,
G_DBUS_CALL_FLAGS_NONE,
-1,
NULL,
&error);
if(error != NULL) {
g_print("Register %s: %s\n", AGENT_PATH, error->message);
return 1;
}
g_variant_unref(result);
return 0;
}
static int bluez_register_autopair_agent(const char *cap)
{
int rc;
rc = bluez_agent_call_method("RegisterAgent", g_variant_new("(os)", AGENT_PATH, cap));
if(rc)
return 1;
rc = bluez_agent_call_method("RequestDefaultAgent", g_variant_new("(o)", AGENT_PATH));
if(rc) {
bluez_agent_call_method("UnregisterAgent", g_variant_new("(o)", AGENT_PATH));
return 1;
}
return 0;
}
static void cleanup_handler(int signo)
{
if (signo == SIGINT) {
g_print("received SIGINT\n");
g_main_loop_quit(loop);
}
}
int main(int argc, char **argv)
{
int id;
int rc;
if(argc < 2)
return 1;
if(signal(SIGINT, cleanup_handler) == SIG_ERR)
g_print("can't catch SIGINT\n");
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);
id = bluez_register_agent(con);
if(id == 0)
goto fail;
rc = bluez_register_autopair_agent(argv[1]);
if(rc) {
g_print("Not able to register default autopair agent\n");
goto fail;
}
g_main_loop_run(loop);
fail:
g_dbus_connection_unregister_object(con, id);
g_object_unref(con);
return 0;
}
在编写自己的源代码之前，最好先从
bluetoothctl基于CLI的配对和连接开始。关于c - 在dbus上的C上的Bluez编程，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/52418268/