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Browsing Anycom GP-600 GPS Receiver fails

Bluez-devel M Josenhans 2 participants 2 messages Sep 18, 2006 – Sep 21, 2006 Bluetooth drivers

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M Josenhans

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Hello bluez,

I own an Anycom GP-600 GPS Receiver. This receiver might have a broken SDP stack. I use SuSE Linux 9.3.

When browsing the device using the sdptool browse command, it fails. However when using Konqueror to browse the SDP-record on the same distribution it works fine.

The difference between kde and sdptool browse seems to be, that kde uses a 32 bit UUID, while the sdptool uses a 16 bit UUID.

Is there any chance that bluez could handle such trouble more gracefully and issue a waring? I remember prior Bluez versions had been working slightly better.

Below you find the dumps for browsing with KDE and sdptool.

Br,
Michael

Browsing with KDE seems to use 32Bit UUID:
------------------------------------------
HCI sniffer - Bluetooth packet analyzer ver 1.18
device: hci0 snap_len: 1028 filter: 0xffffffff
< HCI Command: Inquiry (0x01|0x0001) plen 5

     lap 0x9e8b33 len 6 num 0
Quoted 1 line

HCI Event: Command Status (0x0f) plen 4

     Inquiry (0x01|0x0001) status 0x00 ncmd 1
Quoted 1 line

HCI Event: Inquiry Result (0x02) plen 15

     bdaddr 00:12:EE:9C:D4:CD clkoffset 0x4af5 class 0x520204
Quoted 1 line

HCI Event: Inquiry Result (0x02) plen 15

     bdaddr 00:0E:07:8D:EC:65 clkoffset 0x024d class 0x520204

< HCI Command: Create Connection (0x01|0x0005) plen 13
bdaddr 00:02:78:02:BF:8C ptype 0xcc18 rswitch 0x01 clkoffset 0x0000 Packet type: DM1 DM3 DM5 DH1 DH3 DH5

Quoted 1 line

HCI Event: Inquiry Complete (0x01) plen 1

     status 0x00
Quoted 1 line

HCI Event: Command Status (0x0f) plen 4

     Create Connection (0x01|0x0005) status 0x00 ncmd 1
Quoted 1 line

HCI Event: Link Key Request (0x17) plen 6

     bdaddr 00:02:78:02:BF:8C
< HCI Command: Link Key Request Reply (0x01|0x000b) plen 22
     bdaddr 00:02:78:02:BF:8C
     Link key: 8495e337c0ed515f4925967cead95d83
Quoted 1 line

HCI Event: Command Complete (0x0e) plen 10

     Link Key Request Reply (0x01|0x000b) ncmd 1
     status 0x00 bdaddr 00:02:78:02:BF:8C
Quoted 1 line

HCI Event: Connect Complete (0x03) plen 11

     status 0x00 handle 43 bdaddr 00:02:78:02:BF:8C type ACL encrypt 0x01
< ACL data: handle 43 flags 0x02 dlen 12
     L2CAP(s): Connect req: psm 1 scid 0x0040

< HCI Command: Write Link Policy Settings (0x02|0x000d) plen 4
handle 43 policy 0x0f
Link policy: RSWITCH HOLD SNIFF PARK

Quoted 1 line

HCI Event: Command Complete (0x0e) plen 6

     Write Link Policy Settings (0x02|0x000d) ncmd 1
     status 0x00 handle 43
Quoted 3 lines

HCI Event: Page Scan Repetition Mode Change (0x20) plen 7 HCI Event: Max Slots Change (0x1b) plen 3
HCI Event: Number of Completed Packets (0x13) plen 5

handle 43

Quoted 1 line

ACL data: handle 43 flags 0x02 dlen 16

L2CAP(s): Connect rsp: dcid 0x0051 scid 0x0040 result 1 status 2
Connection pending - Authorization pending

Quoted 1 line

ACL data: handle 43 flags 0x02 dlen 16

     L2CAP(s): Connect rsp: dcid 0x0051 scid 0x0040 result 0 status 0
       Connection successful
< ACL data: handle 43 flags 0x02 dlen 12
     L2CAP(s): Config req: dcid 0x0051 flags 0x00 clen 0
Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 43

Quoted 1 line

ACL data: handle 43 flags 0x02 dlen 14

     L2CAP(s): Config rsp: scid 0x0040 flags 0x00 result 0 clen 0
       Success
Quoted 1 line

ACL data: handle 43 flags 0x02 dlen 16

     L2CAP(s): Config req: dcid 0x0040 flags 0x00 clen 4
       MTU 48
< ACL data: handle 43 flags 0x02 dlen 14
     L2CAP(s): Config rsp: scid 0x0051 flags 0x00 result 0 clen 0
       Success
< ACL data: handle 43 flags 0x02 dlen 26
     L2CAP(d): cid 0x0051 len 22 [psm 1]
         SDP SSA Req: tid 0x0 len 0x11
           pat uuid-32 0x1002 (PubBrwsGrp)
           max 65535
           aid(s) 0x0000 - 0xffff
           cont 00
Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 43

Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 43

Quoted 1 line

ACL data: handle 43 flags 0x02 dlen 14

     L2CAP(d): cid 0x0040 len 10 [psm 1]
         SDP SSA Rsp: tid 0x0 len 0x5
           count 2
           cont 00
< ACL data: handle 43 flags 0x02 dlen 12
     L2CAP(s): Disconn req: dcid 0x0051 scid 0x0040
< ACL data: handle 43 flags 0x02 dlen 12
     L2CAP(s): Connect req: psm 1 scid 0x0041
Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 43

Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 43

Quoted 1 line

ACL data: handle 43 flags 0x02 dlen 12

     L2CAP(s): Disconn rsp: dcid 0x0051 scid 0x0040
Quoted 1 line

ACL data: handle 43 flags 0x02 dlen 16

L2CAP(s): Connect rsp: dcid 0x0052 scid 0x0041 result 1 status 2
Connection pending - Authorization pending

Quoted 1 line

ACL data: handle 43 flags 0x02 dlen 16

     L2CAP(s): Connect rsp: dcid 0x0052 scid 0x0041 result 0 status 0
       Connection successful
< ACL data: handle 43 flags 0x02 dlen 12
     L2CAP(s): Config req: dcid 0x0052 flags 0x00 clen 0
Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 43

Quoted 1 line

ACL data: handle 43 flags 0x02 dlen 14

     L2CAP(s): Config rsp: scid 0x0041 flags 0x00 result 0 clen 0
       Success
Quoted 1 line

ACL data: handle 43 flags 0x02 dlen 16

     L2CAP(s): Config req: dcid 0x0041 flags 0x00 clen 4
       MTU 48
< ACL data: handle 43 flags 0x02 dlen 14
     L2CAP(s): Config rsp: scid 0x0052 flags 0x00 result 0 clen 0
       Success
< ACL data: handle 43 flags 0x02 dlen 26
     L2CAP(d): cid 0x0052 len 22 [psm 1]
         SDP SSA Req: tid 0x0 len 0x11
           pat uuid-32 0x0100 (L2CAP)
           max 65535
           aid(s) 0x0000 - 0xffff
           cont 00
Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 43

Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 43

Quoted 4 lines

ACL data: handle 43 flags 0x02 dlen 17
ACL data: handle 43 flags 0x01 dlen 17
ACL data: handle 43 flags 0x01 dlen 17
ACL data: handle 43 flags 0x01 dlen 1

     L2CAP(d): cid 0x0041 len 48 [psm 1]
         SDP SSA Rsp: tid 0x0 len 0x2b
           count 38
           cont 02 00 0F
< ACL data: handle 43 flags 0x02 dlen 28
     L2CAP(d): cid 0x0052 len 24 [psm 1]
         SDP SSA Req: tid 0x1 len 0x13
           pat uuid-32 0x0100 (L2CAP)
           max 65535
           aid(s) 0x0000 - 0xffff
           cont 02 00 0F
Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 43

Quoted 2 lines

ACL data: handle 43 flags 0x02 dlen 17
ACL data: handle 43 flags 0x01 dlen 10

     L2CAP(d): cid 0x0041 len 23 [psm 1]
         SDP SSA Rsp: tid 0x1 len 0x12
           count 15
           record #0
               aid 0x0000 (SrvRecHndl)
                  uint 0x10000
               aid 0x0001 (SrvClassIDList)
                  < uuid-16 0x1101 (SP) >
               aid 0x0004 (ProtocolDescList)
                  < < uuid-16 0x0100 (L2CAP) > <
                  uuid-16 0x0003 (RFCOMM) uint 0x1 > >
               aid 0x0100 (SrvName)
                  str "SPP slave"
           cont 00
< ACL data: handle 43 flags 0x02 dlen 12
     L2CAP(s): Disconn req: dcid 0x0052 scid 0x0041
Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 43

Quoted 1 line

ACL data: handle 43 flags 0x02 dlen 12

     L2CAP(s): Disconn rsp: dcid 0x0052 scid 0x0041

< HCI Command: Disconnect (0x01|0x0006) plen 3
handle 43 reason 0x13
Reason: Remote User Teminated Connection

Quoted 1 line

HCI Event: Command Status (0x0f) plen 4

     Disconnect (0x01|0x0006) status 0x00 ncmd 1
Quoted 1 line

HCI Event: Disconn Complete (0x05) plen 4

status 0x00 handle 43 reason 0x16
Reason: Connection Terminated by Local Host

Browsing with sdptool command seems to use 16 Bit UUIDs:
--------------------------------------------------------

sdptool browse <bdaddr>;

HCI sniffer - Bluetooth packet analyzer ver 1.18
device: hci0 snap_len: 1028 filter: 0xffffffff
< HCI Command: Create Connection (0x01|0x0005) plen 13
bdaddr 00:02:78:02:BF:8C ptype 0xcc18 rswitch 0x01 clkoffset 0x0000 Packet type: DM1 DM3 DM5 DH1 DH3 DH5

Quoted 1 line

HCI Event: Command Status (0x0f) plen 4

     Create Connection (0x01|0x0005) status 0x00 ncmd 1
Quoted 1 line

HCI Event: Link Key Request (0x17) plen 6

     bdaddr 00:02:78:02:BF:8C
< HCI Command: Link Key Request Reply (0x01|0x000b) plen 22
     bdaddr 00:02:78:02:BF:8C
     Link key: 8495e337c0ed515f4925967cead95d83
Quoted 1 line

HCI Event: Command Complete (0x0e) plen 10

     Link Key Request Reply (0x01|0x000b) ncmd 1
     status 0x00 bdaddr 00:02:78:02:BF:8C
Quoted 1 line

HCI Event: Connect Complete (0x03) plen 11

     status 0x00 handle 42 bdaddr 00:02:78:02:BF:8C type ACL encrypt 0x01
< ACL data: handle 42 flags 0x02 dlen 12
     L2CAP(s): Connect req: psm 1 scid 0x0040

< HCI Command: Write Link Policy Settings (0x02|0x000d) plen 4
handle 42 policy 0x0f
Link policy: RSWITCH HOLD SNIFF PARK

Quoted 1 line

HCI Event: Command Complete (0x0e) plen 6

     Write Link Policy Settings (0x02|0x000d) ncmd 1
     status 0x00 handle 42
Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 42

Quoted 3 lines

HCI Event: Page Scan Repetition Mode Change (0x20) plen 7 HCI Event: Max Slots Change (0x1b) plen 3
ACL data: handle 42 flags 0x02 dlen 16

L2CAP(s): Connect rsp: dcid 0x0050 scid 0x0040 result 1 status 2
Connection pending - Authorization pending

Quoted 1 line

ACL data: handle 42 flags 0x02 dlen 16

     L2CAP(s): Connect rsp: dcid 0x0050 scid 0x0040 result 0 status 0
       Connection successful
< ACL data: handle 42 flags 0x02 dlen 12
     L2CAP(s): Config req: dcid 0x0050 flags 0x00 clen 0
Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 42

Quoted 1 line

ACL data: handle 42 flags 0x02 dlen 14

     L2CAP(s): Config rsp: scid 0x0040 flags 0x00 result 0 clen 0
       Success
Quoted 1 line

ACL data: handle 42 flags 0x02 dlen 16

     L2CAP(s): Config req: dcid 0x0040 flags 0x00 clen 4
       MTU 48
< ACL data: handle 42 flags 0x02 dlen 14
     L2CAP(s): Config rsp: scid 0x0050 flags 0x00 result 0 clen 0
       Success
< ACL data: handle 42 flags 0x02 dlen 24
     L2CAP(d): cid 0x0050 len 20 [psm 1]
         SDP SSA Req: tid 0x0 len 0xf
           pat uuid-16 0x1002 (PubBrwsGrp)
           max 65535
           aid(s) 0x0000 - 0xffff
           cont 00
Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 42

Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 42

Quoted 1 line

ACL data: handle 42 flags 0x02 dlen 14

     L2CAP(d): cid 0x0040 len 10 [psm 1]
         SDP SSA Rsp: tid 0x0 len 0x5
           count 2
           cont 00
< ACL data: handle 42 flags 0x02 dlen 12
     L2CAP(s): Disconn req: dcid 0x0050 scid 0x0040
Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 42

Quoted 1 line

ACL data: handle 42 flags 0x02 dlen 12

     L2CAP(s): Disconn rsp: dcid 0x0050 scid 0x0040

< HCI Command: Disconnect (0x01|0x0006) plen 3
handle 42 reason 0x13
Reason: Remote User Teminated Connection

Quoted 1 line

HCI Event: Command Status (0x0f) plen 4

     Disconnect (0x01|0x0006) status 0x00 ncmd 1
Quoted 1 line

HCI Event: Disconn Complete (0x05) plen 4

status 0x00 handle 42 reason 0x16
Reason: Connection Terminated by Local Host

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maintainer
#1 lore raw

Hi Michael,

Quoted 7 lines

I own an Anycom GP-600 GPS Receiver. This receiver might have a broken SDP stack. I use SuSE Linux 9.3.

When browsing the device using the sdptool browse command, it fails. However when using Konqueror to browse the SDP-record on the same distribution it works fine.

Quoted 6 lines

The difference between kde and sdptool browse seems to be, that kde uses a 32 bit UUID, while the sdptool uses a 16 bit UUID.

Is there any chance that bluez could handle such trouble more gracefully and issue a waring? I remember prior Bluez versions had been working slightly better.

it simply means that this device has no public browse group. That is not a bug. Try "sdptool browse --l2cap <bdaddr>" and see if this works.

Regards

Marcel

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