Problems with InputStream and OutputStream

Bluez-users Johannes 2 participants 5 messages Aug 26, 2004 – Aug 30, 2004 1 message not in the archive Bluetooth drivers

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Johannes

author

2004-08-26 10:48 UTC #0 lore raw

Hi,

I have the following problem.
I want to communicate from a mobile phone to an PC with the BlueZ-Stack and backwards.
In the beginning, I only want to sent short Strings. the way from the phone to the PC works, but the way backwards won't run.
The server side (PC) tells me, that it send the string (6 bytes long), the client (phone) do receive a connection, but the transported String is empty (is.read() = -1).
Is it possible, that the BlueZ implementation is the problem? I am sure, that my source (Java) works correct (on my opinion the problem can cause on two reasons: the BlueZ Stack or the Bluetooth-Stack on my mobile phone). I were glad if someone can tell me something about this.

Greetings Johannes

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Marcel Holtmann

maintainer

2004-08-26 11:24 UTC #1 lore raw

Hi Johannes,

Quoted 4 lines

I have the following problem.
I want to communicate from a mobile phone to an PC with the BlueZ-Stack and backwards.
In the beginning, I only want to sent short Strings. the way from the

Quoted 8 lines

phone to the PC works, but the way backwards won't run.
The server side (PC) tells me, that it send the string (6 bytes long), the client (phone) do receive a connection, but the transported String is empty (is.read() = -1).
Is it possible, that the BlueZ implementation is the problem? I am sure, that my source (Java) works correct (on my opinion the problem can cause on two reasons: the BlueZ Stack or the Bluetooth-Stack on my mobile phone).

go ahead and run "hcidump -x" on the Linux side to see what is going on.

Regards

Marcel

Johannes

author

2004-08-30 10:20 UTC #2 lore raw

Hi,

sorry, but my time run out last week.
I put hcidump -x on, but I'm not familiar with the output, it gives to me. Perhaps you can help me.
But this might be the section, that is relevant to my problem:

<>> ACL data: handle 0x0029 flags 0x02 dlen 12
L2CAP(s): Connect req: psm 3 scid 0x0068
< ACL data: handle 0x0029 flags 0x02 dlen 16
L2CAP(s): Connect rsp: dcid 0x0040 scid 0x0068 result 0 status 0

Quoted 1 line

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

01 29 00 01 00

Quoted 1 line

ACL data: handle 0x0029 flags 0x02 dlen 12

L2CAP(s): Config req: dcid 0x0040 flags 0x0000 clen 0
< ACL data: handle 0x0029 flags 0x02 dlen 14
L2CAP(s): Config rsp: scid 0x0068 flags 0x0000 result 0 clen 0
< ACL data: handle 0x0029 flags 0x02 dlen 16
L2CAP(s): Config req: dcid 0x0068 flags 0x0000 clen 4 MTU 1024

Quoted 1 line

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

01 29 00 01 00

Quoted 1 line

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

01 29 00 01 00

Quoted 1 line

ACL data: handle 0x0029 flags 0x02 dlen 18

L2CAP(s): Config rsp: scid 0x0040 flags 0x0000 result 0 clen 4 MTU 672

Quoted 1 line

ACL data: handle 0x0029 flags 0x02 dlen 8

L2CAP(d): cid 0x40 len 4 [psm 3]

     RFCOMM(s): SABM: cr 1 dlci 0 pf 1 ilen 0 fcs 0x1c
< ACL data: handle 0x0029 flags 0x02 dlen 8
   L2CAP(d): cid 0x68 len 4 [psm 3]
     RFCOMM(s): UA: cr 1 dlci 0 pf 1 ilen 0 fcs 0xd7

Quoted 1 line

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

01 29 00 01 00

Quoted 1 line

ACL data: handle 0x0029 flags 0x02 dlen 18

L2CAP(d): cid 0x40 len 14 [psm 3]
RFCOMM(s): PN CMD: cr 1 dlci 0 pf 0 ilen 10 fcs 0x70 mcc_len 8 dlci 2 frame_type 0 credit_flow 15 pri 0 ack_timer 0 frame_size
667 max_retrans 0 credits 3
< ACL data: handle 0x0029 flags 0x02 dlen 8
L2CAP(d): cid 0x68 len 4 [psm 3]

     RFCOMM(s): DM: cr 1 dlci 2 pf 1 ilen 0 fcs 0x73

Quoted 1 line

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

01 29 00 01 00

Quoted 1 line

ACL data: handle 0x0029 flags 0x02 dlen 12

L2CAP(s): Disconn req: dcid 0x0040 scid 0x0068
< ACL data: handle 0x0029 flags 0x02 dlen 12
L2CAP(s): Disconn rsp: dcid 0x0040 scid 0x0068

Quoted 1 line

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

01 29 00 01 00
< HCI Command: Disconnect(0x01|0x0006) plen 3
29 00 13

Quoted 1 line

HCI Event: Command Status(0x0f) plen 4

00 01 06 04

Quoted 1 line

HCI Event: Disconn Complete(0x05) plen 4

00 29 00 16

The String I send to the server is 12bytes long, the other String 6bytes, but I can't find any messages for these Strings.

Greetings Johannes

Quoted 23 lines · Marcel Holtmann

Hi Johannes,
Quoted 7 lines
I have the following problem.
I want to communicate from a mobile phone to an PC with the BlueZ-Stack and backwards.
In the beginning, I only want to sent short Strings. the way from the phone to the PC works, but the way backwards won't run.
The server side (PC) tells me, that it send the string (6 bytes long), the client (phone) do receive a connection, but the transported String is empty (is.read() = -1).
Is it possible, that the BlueZ implementation is the problem? I am sure, that my source (Java) works correct (on my opinion the problem can cause on two reasons: the BlueZ Stack or the Bluetooth-Stack on my mobile phone).
go ahead and run "hcidump -x" on the Linux side to see what is going on.
Regards
Marcel

Marcel Holtmann

maintainer

2004-08-30 10:27 UTC #3 lore raw

Hi Johannes,

Quoted 52 lines

sorry, but my time run out last week.
I put hcidump -x on, but I'm not familiar with the output, it gives to me.
Perhaps you can help me.
But this might be the section, that is relevant to my problem:
<>> ACL data: handle 0x0029 flags 0x02 dlen 12
    L2CAP(s): Connect req: psm 3 scid 0x0068
< ACL data: handle 0x0029 flags 0x02 dlen 16
    L2CAP(s): Connect rsp: dcid 0x0040 scid 0x0068 result 0 status 0
Quoted 1 line
HCI Event: Number of Completed Packets(0x13) plen 5
01 29 00 01 00
Quoted 1 line
ACL data: handle 0x0029 flags 0x02 dlen 12
    L2CAP(s): Config req: dcid 0x0040 flags 0x0000 clen 0
< ACL data: handle 0x0029 flags 0x02 dlen 14
    L2CAP(s): Config rsp: scid 0x0068 flags 0x0000 result 0 clen 0
< ACL data: handle 0x0029 flags 0x02 dlen 16
    L2CAP(s): Config req: dcid 0x0068 flags 0x0000 clen 4
    MTU 1024
Quoted 1 line
HCI Event: Number of Completed Packets(0x13) plen 5
01 29 00 01 00
Quoted 1 line
HCI Event: Number of Completed Packets(0x13) plen 5
01 29 00 01 00
Quoted 1 line
ACL data: handle 0x0029 flags 0x02 dlen 18
    L2CAP(s): Config rsp: scid 0x0040 flags 0x0000 result 0 clen 4
    MTU 672
Quoted 1 line
ACL data: handle 0x0029 flags 0x02 dlen 8
    L2CAP(d): cid 0x40 len 4 [psm 3]
      RFCOMM(s): SABM: cr 1 dlci 0 pf 1 ilen 0 fcs 0x1c
< ACL data: handle 0x0029 flags 0x02 dlen 8
    L2CAP(d): cid 0x68 len 4 [psm 3]
      RFCOMM(s): UA: cr 1 dlci 0 pf 1 ilen 0 fcs 0xd7
Quoted 1 line
HCI Event: Number of Completed Packets(0x13) plen 5
01 29 00 01 00
Quoted 1 line
ACL data: handle 0x0029 flags 0x02 dlen 18
    L2CAP(d): cid 0x40 len 14 [psm 3]
      RFCOMM(s): PN CMD: cr 1 dlci 0 pf 0 ilen 10 fcs 0x70 mcc_len 8
      dlci 2 frame_type 0 credit_flow 15 pri 0 ack_timer 0 frame_size
667 max_retrans 0 credits 3
< ACL data: handle 0x0029 flags 0x02 dlen 8
    L2CAP(d): cid 0x68 len 4 [psm 3]
      RFCOMM(s): DM: cr 1 dlci 2 pf 1 ilen 0 fcs 0x73
Quoted 1 line
HCI Event: Number of Completed Packets(0x13) plen 5
01 29 00 01 00
Quoted 1 line
ACL data: handle 0x0029 flags 0x02 dlen 12
    L2CAP(s): Disconn req: dcid 0x0040 scid 0x0068
< ACL data: handle 0x0029 flags 0x02 dlen 12
    L2CAP(s): Disconn rsp: dcid 0x0040 scid 0x0068
Quoted 1 line
HCI Event: Number of Completed Packets(0x13) plen 5
01 29 00 01 00
< HCI Command: Disconnect(0x01|0x0006) plen 3
29 00 13

Quoted 7 lines

Quoted 1 line
HCI Event: Command Status(0x0f) plen 4
00 01 06 04
Quoted 1 line
HCI Event: Disconn Complete(0x05) plen 4
00 29 00 16
The String I send to the server is 12bytes long, the other String 6bytes, but I can't find any messages for these Strings.

and there are no RFCOMM UIH packets that may transport your data. Check the connection setup itself, because it looks like that on the other side there is no service running on channel 2.

Regards

Marcel

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Marcel Holtmann

maintainer

2004-08-30 11:09 UTC #5 lore raw

Hi Johannes,

Quoted 1 line

I will try it in german ;)

this is not a good idea. Keep it on the mailing list.

If you cut some data from the output I can't tell you anything. Looks like this is more problematic. So we need a binary dump from this problem. Run "hcidump -w dumpfile". Bzip2 this file and attach it.

Regards

Marcel