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#include <stdio.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/hci.h>
#include <bluetooth/hci_lib.h>
#define DBUS_API_SUBJECT_TO_CHANGE
#include <dbus/dbus.h>
#include "hcid.h"
#include "glib-ectomy.h"
static DBusConnection *connection;
#define TIMEOUT (30 * 1000) // 30 seconds
#define SERVICE_NAME "org.bluez.PinAgent"
#define INTERFACE_NAME SERVICE_NAME
#define REQUEST_NAME "PinRequest"
#define PATH_NAME "/org/bluez/PinAgent"
#define WRONG_ARGS_ERROR "org.bluez.Error.WrongArgs"
struct pin_request
{
int dev;
bdaddr_t bda;
};
static void reply_handler_function(DBusPendingCall *call, void *user_data)
{
struct pin_request *req = (struct pin_request *) user_data;
pin_code_reply_cp pr;
DBusMessage *message;
DBusMessageIter iter;
int type;
size_t len;
char *pin;
message = dbus_pending_call_get_reply(call);
if (dbus_message_is_error(message, WRONG_ARGS_ERROR))
goto error;
dbus_message_iter_init(message, &iter);
type = dbus_message_iter_get_arg_type(&iter);
if (type != DBUS_TYPE_STRING)
goto error;
pin = dbus_message_iter_get_string(&iter);
len = strlen(pin);
memset(&pr, 0, sizeof(pr));
bacpy(&pr.bdaddr, &req->bda);
memcpy(pr.pin_code, pin, len);
pr.pin_len = len;
hci_send_cmd(req->dev, OGF_LINK_CTL, OCF_PIN_CODE_REPLY,
PIN_CODE_REPLY_CP_SIZE, &pr);
return;
error:
hci_send_cmd(req->dev, OGF_LINK_CTL, OCF_PIN_CODE_NEG_REPLY,
6, &req->bda);
}
static void free_pin_req(void *req)
{
free(req);
}
void hcid_dbus_request_pin(int dev, struct hci_conn_info *ci)
{
DBusMessage *message;
DBusMessageIter iter;
DBusPendingCall *pending = NULL;
struct pin_request *req;
message = dbus_message_new_method_call(SERVICE_NAME, PATH_NAME,
INTERFACE_NAME, REQUEST_NAME);
if (message == NULL) {
syslog(LOG_ERR, "Couldn't allocate D-BUS message");
goto failed;
}
req = malloc(sizeof(*req));
req->dev = dev;
bacpy(&req->bda, &ci->bdaddr);
dbus_message_append_iter_init(message, &iter);
dbus_message_iter_append_boolean(&iter, ci->out);
dbus_message_iter_append_byte_array(&iter,
(unsigned char *) &ci->bdaddr, sizeof(ci->bdaddr));
if (dbus_connection_send_with_reply(connection, message,
&pending, TIMEOUT) == FALSE) {
syslog(LOG_ERR, "D-BUS send failed");
goto failed;
}
dbus_pending_call_set_notify(pending, reply_handler_function,
req, free_pin_req);
dbus_connection_flush (connection);
dbus_message_unref (message);
return;
failed:
dbus_message_unref (message);
hci_send_cmd(dev, OGF_LINK_CTL, OCF_PIN_CODE_NEG_REPLY,
6, &ci->bdaddr);
}
gboolean watch_func(GIOChannel *chan, GIOCondition cond, gpointer data)
{
DBusWatch *watch = (DBusWatch *) data;
int flags = 0;
if (cond & G_IO_IN) flags |= DBUS_WATCH_READABLE;
if (cond & G_IO_OUT) flags |= DBUS_WATCH_WRITABLE;
if (cond & G_IO_HUP) flags |= DBUS_WATCH_HANGUP;
if (cond & G_IO_ERR) flags |= DBUS_WATCH_ERROR;
dbus_watch_handle(watch, flags);
dbus_connection_ref(connection);
/* Dispatch messages */
while (dbus_connection_dispatch(connection) == DBUS_DISPATCH_DATA_REMAINS);
dbus_connection_unref(connection);
return TRUE;
}
dbus_bool_t add_watch(DBusWatch *watch, void *data)
{
GIOCondition cond = G_IO_HUP | G_IO_ERR;
GIOChannel *io;
guint id;
int fd, flags;
if (!dbus_watch_get_enabled(watch))
return TRUE;
fd = dbus_watch_get_fd(watch);
io = g_io_channel_unix_new(fd);
flags = dbus_watch_get_flags(watch);
if (flags & DBUS_WATCH_READABLE) cond |= G_IO_IN;
if (flags & DBUS_WATCH_WRITABLE) cond |= G_IO_OUT;
id = g_io_add_watch(io, cond, watch_func, watch);
dbus_watch_set_data(watch, (void *) id, NULL);
return TRUE;
}
static void remove_watch(DBusWatch *watch, void *data)
{
guint id = (guint) dbus_watch_get_data(watch);
dbus_watch_set_data(watch, NULL, NULL);
if (id)
g_io_remove_watch(id);
}
static void watch_toggled(DBusWatch *watch, void *data)
{
/* Because we just exit on OOM, enable/disable is
* no different from add/remove
*/
if (dbus_watch_get_enabled(watch))
add_watch(watch, data);
else
remove_watch(watch, data);
}
gboolean hcid_dbus_init(void)
{
DBusError error;
dbus_error_init(&error);
connection = dbus_bus_get(DBUS_BUS_SYSTEM, &error);
if (connection == NULL) {
fprintf(stderr, "Failed to open connection to system message bus: %s\n",
error.message);
dbus_error_free(&error);
return FALSE;
}
dbus_connection_set_watch_functions(connection,
add_watch, remove_watch, watch_toggled, NULL, NULL);
return TRUE;
}
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