Re: Connect method of org.bluez.Network1 interface throws error "Connect with signature "s" doesn't exist"

On Wed, Aug 10, 2016 at 12:11 PM, Ajay Parashar [off-list ref] wrote:

On Wed, Aug 3, 2016 at 3:44 PM, Ajay Parashar [off-list ref] wrote:

quoted

Hi,

I am using bluez 5.35 and developing an application using Glib DBUS binding.

As per network-api.txt documentation, my code calls connect API with
String type parameter but while execution it prompts below error.
Can you please let me know why is it giving this error and how can i
resolve this.

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Unable to connect with network :
GDBus.Error:org.freedesktop.DBus.Error.UnknownObject: Method "Connect"
with signature "s" on interface "org.bluez.Network1" doesn't exist
////////////////////////////////////////////////////////////////////////////////////////////////////////////

/* For reference please find my code as below*/

int connect_network(char *interface)
{
  int       ret       = 0;
  GError   *error     = NULL;
  GVariant *reply     = NULL;

  GVariant **t = NULL;
  t    = g_new(GVariant *, 1);
  t[0] = g_variant_new_string ("nap");

  GVariant *tuple_variant = g_variant_new_tuple(t, 1);

  /* connect with network */
  reply = g_dbus_connection_call_sync(dbus_conn,
    BLUEZ_BUS_NAME,
    "/org/bluez/hci0",
    "org.bluez.Network1",
    "Connect",
    tuple_variant,
    G_VARIANT_TYPE_STRING,
    G_DBUS_CALL_FLAGS_NONE,
    -1,
    NULL,
    &error);

if (error) {
    printf("Unable to connect with network : %s\n", error->message);
g_free(t);
    return -3;
  }

   g_variant_get(reply, "(s)", &interface);
   printf("interface from connect is = %s\n", interface);
  g_free(t);

  return ret;
}

I am facing the same issue when i executed test-network program
available with  /bluez-5.35/test directory.
I m blocked here, please let me know how to proceed with bluez?

Regards
Ajay

Hi,

I experiment this issue with two different machines, issue still persists.
Please let me know how can i unblock from this issue, i will be
thankful you guys.
Let me explain the steps followed.
On Machine 1
Step 1)
# hciconfig
hci1: Type: BR/EDR  Bus: USB
BD Address: 00:1A:7D:DA:71:05  ACL MTU: 310:10  SCO MTU: 64:8
UP RUNNING PSCAN ISCAN INQUIRY
\RX bytes:43793 acl:12 sco:0 events:353 errors:0
TX bytes:2641 acl:11 sco:0 commands:130 errors:0

Step 2)
create a bridge using brctl commands and it is very much visible and
verified the same by ifconfig command.
# ifconfig
br0       Link encap:Ethernet  HWaddr b6:a3:07:14:05:73
          inet addr:10.0.10.1  Bcast:0.0.0.0  Mask:255.255.255.0
          inet6 addr: fe80::b4a3:7ff:fe14:573/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:215 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:22135 (22.1 KB)

Step 3)
paired this controller successfully with other BT controller that is
associated with machine 2

Step 4)
verified pair status from both machines.

Step 5)
execute the test-nap program

./test-nap br0

Server for nap registered for br0
Press CTRL-C to disconnect

step 6)
On machine 2  verify that controller is working by hciconfig command
# hciconfig
hci0: Type: BR/EDR  Bus: USB
BD Address: 00:1A:7D:DA:71:07  ACL MTU: 310:10  SCO MTU: 64:8
UP RUNNING PSCAN ISCAN
RX bytes:1488 acl:12 sco:0 events:83 errors:0
TX bytes:3609 acl:13 sco:0 commands:56 errors:0

step 7)
On machine 2 execute test-network program
./test-network 00:1A:7D:DA:71:05 nap

Traceback (most recent call last):
  File "./test-network", line 48, in <module>
    iface = network.Connect(service)
  File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 70, in __call__
    return self._proxy_method(*args, **keywords)
  File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 145, in __call__
    **keywords)
  File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line
651, in call_blocking
    message, timeout)
dbus.exceptions.DBusException:
org.freedesktop.DBus.Error.UnknownMethod: Method "Connect" with
signature "s" on interface "org.bluez.Network1" doesn't exist


Regards
Ajay