[Bluez-users] SDP in Motorola phones

[Pedro Monjo Florit <pmonjo2000@yahoo.com>]

[-- Attachment #1: Type: text/plain, Size: 839 bytes --]

Hi,

I am experiencing problems getting SDP information from some new 
Motorola phones (I am dealing with E770). Running "sdptool browse 
BDADDR", I get the attached hcidump. As it can be seen, after the SDP 
SSA request, the mobile phone does not respond any data and after 20 
seconds (the SDP timeout compiled in bluez-libs), sdptool issues an ACL 
disconnect. During this time, the phone freezes completely. If I want to 
get a specific service (say, OBEX), there are no problems.

 From my understanding, the problem is that the Motorola phone does not 
deal correctly with the SDP query issued by bluez. I have been trying to 
debug sdptool and comparing to other implementations (Symbian seems to 
work OK with Motorola) but, as Marcel says, SDP is a horrible protocol.

Has anybody experienced any similar problem?

Thanks,

Pedro

[-- Attachment #2: hcidump_motorola_sdptool.txt --]
[-- Type: text/plain, Size: 2523 bytes --]

< HCI Command: Create Connection (0x01|0x0005) plen 13
    bdaddr 00:12:37:86:61:8A ptype 0xcc18 rswitch 0x01 clkoffset 0x0000
    Packet type: DM1 DM3 DM5 DH1 DH3 DH5
> HCI Event: Command Status (0x0f) plen 4
    Create Connection (0x01|0x0005) status 0x00 ncmd 1
> HCI Event: Connect Complete (0x03) plen 11
    status 0x00 handle 41 bdaddr 00:12:37:86:61:8A type ACL encrypt 0x00
< ACL data: handle 41 flags 0x02 dlen 12
    L2CAP(s): Connect req: psm 1 scid 0x0040
< HCI Command: Write Link Policy Settings (0x02|0x000d) plen 4
    handle 41 policy 0x0f
    Link policy: RSWITCH HOLD SNIFF PARK
> HCI Event: Number of Completed Packets (0x13) plen 5
    handle 41 packets 1
> HCI Event: Command Complete (0x0e) plen 6
    Write Link Policy Settings (0x02|0x000d) ncmd 1
    status 0x00 handle 41
> HCI Event: Max Slots Change (0x1b) plen 3
    handle 41 slots 5
> ACL data: handle 41 flags 0x02 dlen 16
    L2CAP(s): Connect rsp: dcid 0x0040 scid 0x0040 result 0 status 0
      Connection successful
< ACL data: handle 41 flags 0x02 dlen 12
    L2CAP(s): Config req: dcid 0x0040 flags 0x00 clen 0
> ACL data: handle 41 flags 0x02 dlen 16
    L2CAP(s): Config req: dcid 0x0040 flags 0x00 clen 4
      MTU 1024
< ACL data: handle 41 flags 0x02 dlen 14
    L2CAP(s): Config rsp: scid 0x0040 flags 0x00 result 0 clen 0
      Success
> HCI Event: Number of Completed Packets (0x13) plen 5
    handle 41 packets 1
> HCI Event: Number of Completed Packets (0x13) plen 5
    handle 41 packets 1
> ACL data: handle 41 flags 0x02 dlen 14
    L2CAP(s): Config rsp: scid 0x0040 flags 0x00 result 0 clen 0
      Success
< ACL data: handle 41 flags 0x02 dlen 24
    L2CAP(d): cid 0x0040 len 20 [psm 1]
        SDP SSA Req: tid 0x0 len 0xf
          pat uuid-16 0x1002 (PubBrwsGrp)
          max 65535
          aid(s) 0x0000 - 0xffff
          cont 00
> HCI Event: Number of Completed Packets (0x13) plen 5
    handle 41 packets 1
< ACL data: handle 41 flags 0x02 dlen 12
    L2CAP(s): Disconn req: dcid 0x0040 scid 0x0040
> HCI Event: Number of Completed Packets (0x13) plen 5
    handle 41 packets 1
> ACL data: handle 41 flags 0x02 dlen 12
    L2CAP(s): Disconn rsp: dcid 0x0040 scid 0x0040
< HCI Command: Disconnect (0x01|0x0006) plen 3
    handle 41 reason 0x13
    Reason: Remote User Terminated Connection
> HCI Event: Command Status (0x0f) plen 4
    Disconnect (0x01|0x0006) status 0x00 ncmd 1
> HCI Event: Disconn Complete (0x05) plen 4
    status 0x00 handle 41 reason 0x16
    Reason: Connection Terminated by Local Host