Re: Networking - NetworkServer1

Hi Luiz,

Thanks for the quick response. Very much appreciated.

On Wed, 22 Jul 2020 at 00:27, Luiz Augusto von Dentz
[off-list ref] wrote:

quoted

= bluetoothd: bnep: Can't add bnep0 to the bridge tether: No such
device(19)                     21:54:01.138304

Well it looks like the bridge (tether) does not exist so we can't add
the bnep interface, perhaps the idea is not to have it attached to any
bridge in case of GN, PAN and just bring the interface up when an
empty string is given as bridge.

An empty string also produced the error.

However, I created a bridge using the bridge utilities package
$ sudo apt install bridge-utils
$ sudo brctl addbr bluez

And then used
server.Register('panu', 'bluez')

This enabled the connection to be accepted from the client to happen
without error.

$ service bluetooth status
● bluetooth.service - Bluetooth service
   Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled;
vendor preset: enabled)
   Active: active (running) since Tue 2020-07-21 09:27:49 BST; 24h ago
     Docs: man:bluetoothd(8)
 Main PID: 625 (bluetoothd)
   Status: "Running"
    Tasks: 1 (limit: 2200)
   Memory: 3.3M
   CGroup: /system.slice/bluetooth.service
           └─625 /usr/lib/bluetooth/bluetoothd --experimental

Jul 22 07:27:43 raspberrypi bluetoothd[625]: bnep: bridge bluez:
interface bnep0 added



I think the bridge probably needs more refinement as there does not
appear to be a route between the two devices still.

Any pointers on that appreciated.

Thanks again for your help on this Luiz.

Regards,
Barry


$ brctl show
bridge name     bridge id               STP enabled     interfaces
bluez           8000.b827eb2257e0       no              bnep0

$ brctl showstp bluez
bluez
 bridge id              8000.b827eb2257e0
 designated root        8000.b827eb2257e0
 root port                 0                    path cost                  0
 max age                  20.00                 bridge max age            20.00
 hello time                2.00                 bridge hello time          2.00
 forward delay            15.00                 bridge forward delay      15.00
 ageing time             300.00
 hello timer               0.00                 tcn timer                  0.00
 topology change timer     0.00                 gc timer                   0.00
 flags


bnep0 (1)
 port id                8001                    state                  disabled
 designated root        8000.b827eb2257e0       path cost                100
 designated bridge      8000.b827eb2257e0       message age timer          0.00
 designated port        8001                    forward delay timer        0.00
 designated cost           0                    hold timer                 0.00
 flags

$ ifconfig bluez
bluez: flags=4098<BROADCAST,MULTICAST>  mtu 1500
        ether b8:27:eb:22:57:e0  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

$ ifconfig bnep0
bnep0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 169.254.91.109  netmask 255.255.0.0  broadcast 169.254.255.255
        inet6 fe80::ba27:ebff:fe22:57e0  prefixlen 64  scopeid 0x20<link>
        inet6 fe80::64d6:60a1:4a0d:3e4  prefixlen 64  scopeid 0x20<link>
        ether b8:27:eb:22:57:e0  txqueuelen 1000  (Ethernet)
        RX packets 111  bytes 20669 (20.1 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 57  bytes 16084 (15.7 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

$ route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.1.254   0.0.0.0         UG    202    0        0 eth0
169.254.0.0     0.0.0.0         255.255.0.0     U     233    0        0 bnep0
192.168.1.0     0.0.0.0         255.255.255.0   U     202    0        0 eth0