Return-Path: Message-ID: <80236d750701250229u61cbb820v929b8d0ad6ae3fb9@mail.gmail.com> Date: Thu, 25 Jan 2007 11:29:52 +0100 From: "Emanuele Novelli" To: bluez-users@lists.sourceforge.net MIME-Version: 1.0 Subject: [Bluez-users] multithread / multi process use Reply-To: BlueZ users List-Id: BlueZ users List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============0270179465==" Sender: bluez-users-bounces@lists.sourceforge.net Errors-To: bluez-users-bounces@lists.sourceforge.net --===============0270179465== Content-Type: multipart/alternative; boundary="----=_Part_4355_23574725.1169720992320" ------=_Part_4355_23574725.1169720992320 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline Hello I'm new here, I searched for this issue but found nothing. Using 2 threads or 2 process for reading a name of a 2 remote devices at same time reports always the same name. Is this a bug or the hci functions in library do not support concurrent use ? (using 2.6.19 kernel on FC6 and bluez libs 3.7.1) This is a simply way to reproduce this: open a 2 shells and issue 2 commands at same time hcitool name they both report the same name here an HCI dump of what's happening 2007-01-25 11:15:06.093319 < HCI Command: Remote Name Request (0x01|0x0019) plen 10 bdaddr 00:0A:28:DF:2B:D8 mode 2 clkoffset 0x0000 2007-01-25 11:15:06.114456 > HCI Event: Command Status (0x0f) plen 4 Remote Name Request (0x01|0x0019) status 0x00 ncmd 1 2007-01-25 11:15:06.712794 < HCI Command: Remote Name Request (0x01|0x0019) plen 10 bdaddr 00:17:4B:D3:9F:5B mode 2 clkoffset 0x0000 2007-01-25 11:15:06.717442 > HCI Event: Command Status (0x0f) plen 4 Remote Name Request (0x01|0x0019) status 0x00 ncmd 0 2007-01-25 11:15:07.238429 > HCI Event: Remote Name Req Complete (0x07) plen 255 status 0x00 bdaddr 00:0A:28:DF:2B:D8 name 'Seleso' 2007-01-25 11:15:07.239434 > HCI Event: Command Status (0x0f) plen 4 Unknown (0x00|0x0000) status 0x00 ncmd 1 2007-01-25 11:15:10.151342 > HCI Event: Remote Name Req Complete (0x07) plen 255 status 0x00 bdaddr 00:17:4B:D3:9F:5B name 'Wince' the second event with the second name is tracked but never reported back to the caller cause the unknown event received. so i see the name 'Seleso' as result on both the shells this is the behaviour if I use the 2 command sequentially they works fine. hcitool name 00:0A:28:DF:2B:D8 2007-01-25 11:19:51.930394 < HCI Command: Remote Name Request (0x01|0x0019) plen 10 bdaddr 00:0A:28:DF:2B:D8 mode 2 clkoffset 0x0000 2007-01-25 11:19:51.951520 > HCI Event: Command Status (0x0f) plen 4 Remote Name Request (0x01|0x0019) status 0x00 ncmd 1 2007-01-25 11:19:52.199514 > HCI Event: Remote Name Req Complete (0x07) plen 255 status 0x00 bdaddr 00:0A:28:DF:2B:D8 name 'Seleso' hcitool name 00:17:4B:D3:9F:5B 2007-01-25 11:20:39.520967 < HCI Command: Remote Name Request (0x01|0x0019) plen 10 bdaddr 00:17:4B:D3:9F:5B mode 2 clkoffset 0x0000 2007-01-25 11:20:39.542195 > HCI Event: Command Status (0x0f) plen 4 Remote Name Request (0x01|0x0019) status 0x00 ncmd 1 2007-01-25 11:20:43.358090 > HCI Event: Remote Name Req Complete (0x07) plen 255 status 0x00 bdaddr 00:17:4B:D3:9F:5B name 'Wince' Since I need to use search names and search services (FAX especially) on a multi-threaded application i'd like to know if is this possible or somewhere there is a issue that prevent this. ------=_Part_4355_23574725.1169720992320 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline Hello I'm new here, I searched for this issue but found nothing.

Using 2 threads or 2 process for reading a name of a 2 remote devices at same time reports always the same name.
Is this a bug or the hci functions in library do not support concurrent use ?
(using 2.6.19 kernel on FC6 and bluez libs 3.7.1)

This is a simply way to reproduce this:

open a 2 shells and issue 2 commands at same time

hcitool name <bdaddress of a device close to you>

they both report the same name

here an HCI dump of what's happening

2007-01-25 11:15:06.093319 < HCI Command: Remote Name Request (0x01|0x0019) plen 10
    bdaddr 00:0A:28:DF:2B:D8 mode 2 clkoffset 0x0000
2007-01-25 11:15:06.114456 > HCI Event: Command Status (0x0f) plen 4
    Remote Name Request (0x01|0x0019) status 0x00 ncmd 1
2007-01-25 11:15:06.712794 < HCI Command: Remote Name Request (0x01|0x0019) plen 10
    bdaddr 00:17:4B:D3:9F:5B mode 2 clkoffset 0x0000
2007-01-25 11:15:06.717442 > HCI Event: Command Status (0x0f) plen 4
    Remote Name Request (0x01|0x0019) status 0x00 ncmd 0
2007-01-25 11:15:07.238429 > HCI Event: Remote Name Req Complete (0x07) plen 255
    status 0x00 bdaddr 00:0A:28:DF:2B:D8 name 'Seleso'
2007-01-25 11:15:07.239434 > HCI Event: Command Status (0x0f) plen 4
    Unknown (0x00|0x0000) status 0x00 ncmd 1
2007-01-25 11:15:10.151342 > HCI Event: Remote Name Req Complete (0x07) plen 255
    status 0x00 bdaddr 00:17:4B:D3:9F:5B name 'Wince'

the second event with the second name is tracked but never reported back to the caller cause the unknown event received.
so i see the name 'Seleso' as result on both the shells

this is the behaviour if I use the 2 command sequentially they works fine.

hcitool name 00:0A:28:DF:2B:D8

2007-01-25 11:19:51.930394 < HCI Command: Remote Name Request (0x01|0x0019) plen 10
    bdaddr 00:0A:28:DF:2B:D8 mode 2 clkoffset 0x0000
2007-01-25 11:19:51.951520 > HCI Event: Command Status (0x0f) plen 4
    Remote Name Request (0x01|0x0019) status 0x00 ncmd 1
2007-01-25 11:19:52.199514 > HCI Event: Remote Name Req Complete (0x07) plen 255
    status 0x00 bdaddr 00:0A:28:DF:2B:D8 name 'Seleso'

hcitool name 00:17:4B:D3:9F:5B

2007-01-25 11:20:39.520967 < HCI Command: Remote Name Request (0x01|0x0019) plen 10
    bdaddr 00:17:4B:D3:9F:5B mode 2 clkoffset 0x0000
2007-01-25 11:20:39.542195 > HCI Event: Command Status (0x0f) plen 4
    Remote Name Request (0x01|0x0019) status 0x00 ncmd 1
2007-01-25 11:20:43.358090 > HCI Event: Remote Name Req Complete (0x07) plen 255
    status 0x00 bdaddr 00:17:4B:D3:9F:5B name 'Wince'

Since I need to use search names and search services (FAX especially) on a multi-threaded application i'd like to know if is this possible or somewhere there is a issue that prevent this.

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