Re: Unknown Connection Identifier

On Tue, Nov 24, 2015 at 12:00 PM, Marcel Holtmann [off-list ref] wro=
te:

Hi Francois,

quoted

Thanks both of you for your input.

Here are my 100% reproducible steps:
- Restart bluetoothd to start fresh
- Remove cached device (remove 88:0F:10:9D:EB:42)
- Run basic scan (scan on)
- Wait for the device to pop up in results and stop scan (scan off)
- Try to connect to it (connect 88:0F:10:9D:EB:42)

As you can read below I now have 2 "LE Connection Complete (0x01)" event=

s.

quoted

Bluetooth monitor ver 5.35
=3D New Index: A4:17:31:78:A6:04 (BR/EDR,USB,hci0)
               [hci0] 0.624321
< HCI Command: LE Add Device To White List (0x08|0x0011) plen 7
              [hci0] 11.038826
       Address type: Public (0x00)
       Address: 88:0F:10:9D:EB:42 (OUI 88-0F-10)

quoted

HCI Event: Command Complete (0x0e) plen 4                              =

             [hci0] 11.040084

quoted

     LE Add Device To White List (0x08|0x0011) ncmd 1
       Status: Success (0x00)
< HCI Command: LE Set Scan Parameters (0x08|0x000b) plen 7
              [hci0] 11.040125
       Type: Passive (0x00)
       Interval: 60.000 msec (0x0060)
       Window: 30.000 msec (0x0030)
       Own address type: Public (0x00)
       Filter policy: Ignore not in white list (0x01)

quoted

HCI Event: Command Complete (0x0e) plen 4                              =

             [hci0] 11.041085

quoted

     LE Set Scan Parameters (0x08|0x000b) ncmd 1
       Status: Success (0x00)
< HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2
              [hci0] 11.041134
       Scanning: Enabled (0x01)
       Filter duplicates: Enabled (0x01)

quoted

HCI Event: Command Complete (0x0e) plen 4                              =

             [hci0] 11.042084

quoted

     LE Set Scan Enable (0x08|0x000c) ncmd 1
       Status: Success (0x00)

quoted

HCI Event: LE Meta Event (0x3e) plen 43                                =

             [hci0] 15.668141

quoted

     LE Advertising Report (0x02)
       Num reports: 1
       Event type: Connectable undirected - ADV_IND (0x00)
       Address type: Public (0x00)
       Address: 88:0F:10:9D:EB:42 (OUI 88-0F-10)
       Data length: 31
       Flags: 0x06
         LE General Discoverable Mode
         BR/EDR Not Supported
       Company: Anhui Huami Information Technology Co., Ltd. (343)
         Data: 00f70b676930f4c909f4a5acd792a299ff02880f109deb42
       RSSI: -59 dBm (0xc5)
< HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2
              [hci0] 15.668289
       Scanning: Disabled (0x00)
       Filter duplicates: Disabled (0x00)

quoted

HCI Event: Command Complete (0x0e) plen 4                              =

             [hci0] 15.669062

quoted

     LE Set Scan Enable (0x08|0x000c) ncmd 1
       Status: Success (0x00)
< HCI Command: LE Create Connection (0x08|0x000d) plen 25
              [hci0] 15.669171
       Scan interval: 60.000 msec (0x0060)
       Scan window: 30.000 msec (0x0030)

we might should have the LE Create Connection scan with a full duty cycle=

 here. So it does not miss any advertising PDUs.

quoted

       Filter policy: White list is not used (0x00)
       Peer address type: Public (0x00)
       Peer address: 88:0F:10:9D:EB:42 (OUI 88-0F-10)
       Own address type: Public (0x00)
       Min connection interval: 50.00 msec (0x0028)
       Max connection interval: 70.00 msec (0x0038)
       Connection latency: 0x0000
       Supervision timeout: 420 msec (0x002a)
       Min connection length: 0.000 msec (0x0000)
       Max connection length: 0.000 msec (0x0000)

quoted

HCI Event: Command Status (0x0f) plen 4                                =

             [hci0] 15.670065

quoted

     LE Create Connection (0x08|0x000d) ncmd 1
       Status: Success (0x00)
< HCI Command: LE Create Connection Cancel (0x08|0x000e) plen 0
              [hci0] 17.670566

And I think we need to increase the timeout to something like 4-5 seconds=

 before we give up and try the next device that might have been found.

quoted

quoted

HCI Event: Command Complete (0x0e) plen 4                              =

             [hci0] 17.672048

quoted

     LE Create Connection Cancel (0x08|0x000e) ncmd 1
       Status: Success (0x00)

quoted

HCI Event: LE Meta Event (0x3e) plen 19                                =

             [hci0] 17.674036

quoted

     LE Connection Complete (0x01)
       Status: Unknown Connection Identifier (0x02)
       Handle: 32
       Role: Master (0x00)
       Peer address type: Public (0x00)
       Peer address: 88:0F:10:9D:EB:42 (OUI 88-0F-10)
       Connection interval: 67.50 msec (0x0036)
       Connection latency: 0.00 msec (0x0000)
       Supervision timeout: 420 msec (0x002a)
       Master clock accuracy: 0x00
@ Connect Failed: 88:0F:10:9D:EB:42 (1) status 0x02

This one still needs to be fixed. It is a bug. The implementation is too =

naive. The unknown connection identifier is actually the success case for L=
E Create Connection Cancel command. And since we keep trying until the conn=
ection timeout hits, this is not an error at this point.

Where should I file that bug so that I can keep track of it?

Regards

Marcel