Hi,
I've ran into an issue where data doesn't seem to be received by a slave device.
I do the following:
Using Gentoo Linux (2.6.34-gentoo-r1)
Using BlueZ 4.81
1. Use BlueZ to connect to two Bluetooth devices using HCI only. This
is over USB.
2. I set one device as a slave and then create a connection between
the two. This completes sucessfully and can be seen on both sides.
3. I then try to send an acl packet with the word "hi" in it and it is
not received on the other side.
--------
Doing the same thing above but:
Using Fedora Core 5 (2.6.20-1.2320.fc5)
And:
bluez-libs-2.25-1
bluez-pin-0.30-2
bluez-utils-2.25-4
bluez-libs-devel-2.25-1
bluez-hcidump-1.30-1
and using the same hardware - the problem doesn't happen.
I have attached two HCI dumps, one of the Master device and one of the Slave.
Thanks for any help you can give.
On 05/13/2011 11:13 AM, ext Suraj Sumangala wrote:
> You have to enable it in the cofigure file and change "test_enable" from "no" to "yes".
> Edit the file "configure", search for "test_enable"
> change "test_enable=no" to "test_enable=yes"
>
> That is what I do to enable l2test. I guess there could be some other cleaner way to do it.
./configure --help :)
If you pull from the git repo ./bootstrap-configure already enables most of them.
Although lately configure is often *not* complaining if something is missing
from build dependencies, have to do a bit of trial & error to get it right.
This is very easy to notice when trying to 'make' bluez on a clean system
where it hasn't ever been built before.
Cheers,
Mika
Hi,
________________________________________
From: [email protected] [[email protected]] On Behalf Of Eponymous - [[email protected]]
Sent: Friday, May 13, 2011 1:24 PM
To: Eponymous -; [email protected]
Subject: Re: HCI data payload not getting through when using BlueZ
Can someone please advise me further on this please? There is no
binary called "l2test" in the 4.91 sources. It's crucial I get this
problem remedied as I can't send data between two HCI devices. This
could be a bug in BlueZ...
On Thu, May 12, 2011 at 11:19 AM, Eponymous - <[email protected]> wrote:
> Hi,
>
> I've just downloaded the 4.91 sources and done a make and the only
> program I can see starting "l2" is "l2ping". There is no l2test.
>
>
> On Wed, May 11, 2011 at 5:47 PM, Gustavo F. Padovan
> <[email protected]> wrote:
>> * Eponymous - <[email protected]> [2011-05-11 09:52:28 +0100]:
>>
>>> Hi,
>>>
>>> I've ran into an issue where data doesn't seem to be received by a slave device.
>>>
>>> I do the following:
>>>
>>> Using Gentoo Linux (2.6.34-gentoo-r1)
>>> Using BlueZ 4.81
>>>
>>> 1. Use BlueZ to connect to two Bluetooth devices using HCI only. This
>>> is over USB.
>>>
>>> 2. I set one device as a slave and then create a connection between
>>> the two. This completes sucessfully and can be seen on both sides.
>>>
>>> 3. I then try to send an acl packet with the word "hi" in it and it is
>>> not received on the other side.
>>
>> There a utility called l2test in the bluez sources. Check if it works for you.
>> Using -r in one side to listen and -s in the other side to send data. Or
>> l2test -h and see all options.
>>
>> --
>> Gustavo F. Padovan
>> http://profusion.mobi
>>
>
You have to enable it in the cofigure file and change "test_enable" from "no" to "yes".
Edit the file "configure", search for "test_enable"
change "test_enable=no" to "test_enable=yes"
That is what I do to enable l2test. I guess there could be some other cleaner way to do it.
Regards
Suraj
Can someone please advise me further on this please? There is no
binary called "l2test" in the 4.91 sources. It's crucial I get this
problem remedied as I can't send data between two HCI devices. This
could be a bug in BlueZ...
On Thu, May 12, 2011 at 11:19 AM, Eponymous - <[email protected]> wrote:
> Hi,
>
> I've just downloaded the 4.91 sources and done a make and the only
> program I can see starting "l2" is "l2ping". There is no l2test.
>
>
> On Wed, May 11, 2011 at 5:47 PM, Gustavo F. Padovan
> <[email protected]> wrote:
>> * Eponymous - <[email protected]> [2011-05-11 09:52:28 +0100]:
>>
>>> Hi,
>>>
>>> I've ran into an issue where data doesn't seem to be received by a slave device.
>>>
>>> I do the following:
>>>
>>> Using Gentoo Linux (2.6.34-gentoo-r1)
>>> Using BlueZ 4.81
>>>
>>> 1. Use BlueZ to connect to two Bluetooth devices using HCI only. This
>>> is over USB.
>>>
>>> 2. I set one device as a slave and then create a connection between
>>> the two. This completes sucessfully and can be seen on both sides.
>>>
>>> 3. I then try to send an acl packet with the word "hi" in it and it is
>>> not received on the other side.
>>
>> There a utility called l2test in the bluez sources. Check if it works for you.
>> Using -r in one side to listen and -s in the other side to send data. Or
>> l2test -h and see all options.
>>
>> --
>> Gustavo F. Padovan
>> http://profusion.mobi
>>
>
Hi,
I've just downloaded the 4.91 sources and done a make and the only
program I can see starting "l2" is "l2ping". There is no l2test.
On Wed, May 11, 2011 at 5:47 PM, Gustavo F. Padovan
<[email protected]> wrote:
> * Eponymous - <[email protected]> [2011-05-11 09:52:28 +0100]:
>
>> Hi,
>>
>> I've ran into an issue where data doesn't seem to be received by a slave device.
>>
>> I do the following:
>>
>> Using Gentoo Linux (2.6.34-gentoo-r1)
>> Using BlueZ 4.81
>>
>> 1. Use BlueZ to connect to two Bluetooth devices using HCI only. This
>> is over USB.
>>
>> 2. I set one device as a slave and then create a connection between
>> the two. This completes sucessfully and can be seen on both sides.
>>
>> 3. I then try to send an acl packet with the word "hi" in it and it is
>> not received on the other side.
>
> There a utility called l2test in the bluez sources. Check if it works for you.
> Using -r in one side to listen and -s in the other side to send data. Or
> l2test -h and see all options.
>
> --
> Gustavo F. Padovan
> http://profusion.mobi
>
* Eponymous - <[email protected]> [2011-05-11 09:52:28 +0100]:
> Hi,
>
> I've ran into an issue where data doesn't seem to be received by a slave device.
>
> I do the following:
>
> Using Gentoo Linux (2.6.34-gentoo-r1)
> Using BlueZ 4.81
>
> 1. Use BlueZ to connect to two Bluetooth devices using HCI only. This
> is over USB.
>
> 2. I set one device as a slave and then create a connection between
> the two. This completes sucessfully and can be seen on both sides.
>
> 3. I then try to send an acl packet with the word "hi" in it and it is
> not received on the other side.
There a utility called l2test in the bluez sources. Check if it works for you.
Using -r in one side to listen and -s in the other side to send data. Or
l2test -h and see all options.
--
Gustavo F. Padovan
http://profusion.mobi
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Thanks for your reply Peter.
Sorry if I came across a bit rude there, it is just very frustrating
sometimes :)
Ok, I managed to get l2test working from the 4.91 source using BlueZ 4.94:
./l2test -s -i 00:02:5B:00:31:27 -b 10 00:02:5B:00:31:25
l2test[30513]: Connected [imtu 672, omtu 672, flush_to 65535, mode 0,
handle 44, class 0x000000]
l2test[30513]: Sending ...
./l2test -r -i 00:02:5B:00:31:25
l2test[30498]: Waiting for connection on psm 4113 ...
l2test[30590]: Connect from 00:02:5B:00:31:27 [imtu 672, omtu 672,
flush_to 65535, mode 0, handle 44, class 0x480100]
l2test[30590]: Receiving ...
l2test[30590]: 680 bytes in 0.09 sec, 7.36 kB/s
l2test[30590]: 680 bytes in 0.08 sec, 7.82 kB/s
l2test[30590]: 680 bytes in 0.10 sec, 6.92 kB/s
l2test[30590]: 680 bytes in 0.08 sec, 7.82 kB/s
l2test[30590]: 680 bytes in 0.08 sec, 7.82 kB/s
l2test[30590]: 680 bytes in 0.08 sec, 7.82 kB/s
l2test[30590]: 680 bytes in 0.08 sec, 7.82 kB/s
l2test[30590]: 680 bytes in 0.08 sec, 7.82 kB/s
l2test[30590]: Disconnect: Success
Does this help us?
You mentioned enabling debug messages for btusb and bluetooth. Do you
by any chance know how to do this?
Thanks.
On Fri, Jun 3, 2011 at 6:35 PM, Peter Hurley <[email protected]> wrote:
> On Wed, 2011-05-11 at 04:52 -0400, Eponymous - wrote:
>> Hi,
>>
>> I've ran into an issue where data doesn't seem to be received by a slave device.
>>
>> I do the following:
>>
>> Using Gentoo Linux (2.6.34-gentoo-r1)
>> Using BlueZ 4.81
>>
>> 1. Use BlueZ to connect to two Bluetooth devices using HCI only. This
>> is over USB.
>>
>> 2. I set one device as a slave and then create a connection between
>> the two. This completes sucessfully and can be seen on both sides.
>>
>> 3. I then try to send an acl packet with the word "hi" in it and it is
>> not received on the other side.
>>
>> --------
>>
>> Doing the same thing above but:
>>
>> Using Fedora Core 5 (2.6.20-1.2320.fc5)
>> And:
>> bluez-libs-2.25-1
>> bluez-pin-0.30-2
>> bluez-utils-2.25-4
>> bluez-libs-devel-2.25-1
>> bluez-hcidump-1.30-1
>>
>> and using the same hardware - the problem doesn't happen.
>>
>> I have attached two HCI dumps, one of the Master device and one of the Slave.
>>
>> Thanks for any help you can give.
>
> Although it's not at all clear from your posts, I'm assuming that you're
> using a raw HCI socket in a user-space utility.
>
> My guess is that the btusb kernel driver is dropping your ACL packet
> without transmitting it. If you look at drivers/bluetooth/btusb.c. in
> the btusb_send_frame() function, you'll see:
>
> ? ? ? ?switch (bt_cb(skb)->pkt_type) {
> ? ? ? ? ? ? ? ?....
> ? ? ? ?case HCI_ACLDATA_PKT:
> ? ? ? ? ? ? ? ?if (!data->bulk_tx_ep || hdev->conn_hash.acl_num < 1)
> ? ? ? ? ? ? ? ? ? ? ? ?return -ENODEV;
>
> The only way that hdev->conn_hash.acl_num will be 1+ is if the
> establishment of an ACL connection went through hci_connect() with a
> connection type of ACL_LINK. This code was added when SCO support was
> added back in Aug 2008.
>
> The acl_num test (and the sco_test below it) probably should be skipped
> if the HCI device is in raw mode (assuming you sent the HCISETRAW ioctl
> to both devices).
>
> You can confirm this is happening by enabling debug messages for btusb
> and bluetooth. You shouldn't need bluez, as this is the user-space
> daemon responsible for the protocols built on L2CAP and SCO (SDP,
> RFCOMM, A2DP, etc.)
>
> On Mon, 2011-05-30 at 09:57 -0400, Eponymous - wrote:
>> Ok well this has been a complete waste of time. I guess we should just
>> ignore a potential bug then,...
>>
>> Is this project dead or something? I can't believe an entire mailing
>> list can't be bothered to even e-mail back or try and help with this.
>
> This isn't appropriate.
>
> I can understand your frustration that what you want to work doesn't,
> but since you're using a kernel interface directly, you should be
> prepared to debug that yourself.
>
> On Fri, 2011-05-13 at 08:42 -0400, Eponymous - wrote:
>> The following were executed in a root shell.
>>
>> Receive Side (Device B):
>>
>> $ ./l2test -r 00:02:5B:00:31:21
>> l2test[29219]: Waiting for connection on psm 4113 ...
>>
>> Transmit Side (Device A):
>>
>> $ ./l2test -s -b 10 00:02:5B:01:FE:DF
> ...
>>
>> Doesn't appear to work...
>
> BTW, you're using l2test wrong. With the each CSR dongle on *different
> machines*, this is supposed to look like:
>
> Receive side (device 00:02:5B:00:31:21)
> $ ./l2test -r
>
> Transmit side (device 00:02:5B:01:FE:DF)
> $ ./l2test -s -b 10 00:02:5B:00:31:21
>
> NB: the bdaddr parameter is used to indicate *to where*, not *from
> where*.
>
> Since you have both devices on the same machine, do this (in root
> shells):
>
> Receive side (device 00:02:5B:00:31:21)
> $ ./l2test -r -i 00:02:5B:00:31:21
>
> Transmit side (device 00:02:5B:01:FE:DF)
> $ ./l2test -s -i 00:02:5B:01:FE:DF -b 10 00:02:5B:00:31:21
>
> Lastly, you may want to reconsider the way you're using Bluetooth. ?If
> you can get L2CAP working on your setup (ie, if l2test works), then
> consider using RFCOMM instead. Most BT stacks are not going to let you
> program the host controller directly.
>
> Good luck,
> Peter Hurley
>
>
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Thanks for the information.
Hmm, I'm not sure what you mean about a "raw hci" socket. Could you
tell me how I can check this?
I'm using a custom program that can communicate directly to the chip
over hci using bluez as a go-between. Does this help?
Cheers.
On Thu, Jun 30, 2011 at 4:47 PM, Peter Hurley <[email protected]> wrote:
> On Wed, 2011-06-29 at 06:22 -0400, Eponymous - wrote:
>> Thanks for your reply Peter.
>>
>> Sorry if I came across a bit rude there, it is just very frustrating
>> sometimes :)
>
> I get it. BT can be <arggghhh>...
>
>> You mentioned enabling debug messages for btusb and bluetooth. Do you
>> by any chance know how to do this?
>
> I always run a debug kernel. My relevant build settings in the "Kernel
> hacking" submenu are:
> ?Kernel Debugging => DEBUG_KERNEL=y
> ?Debug Filesystem => DEBUG_FS=y
> ?Compile the kernel with debug info => DEBUG_INFO=y
> and most importantly,
> ?Enable dynamic printk() support DYNAMIC_DEBUG=y
>
> Then read the short dynamic debug howto in the kernel documentation:
> Documentation/dynamic-debug-howto.txt (there are some copies online as
> well if that's easier).
>
> Then when I want to see debug messages, I just enable those source
> files. Eg.,
> # echo -n 'file hci_core.c +p' > /sys/kernel/debug/dynamic_debug/control
> # echo -n 'file hci_conn.c +p' ...
> # echo -n 'file hci_event.c +p' ...
>
> Plus, it's easy to add your own if you suspect a particular code path.
>
> If you have more questions about this, come ask on IRC #bluez.
>
>> On Fri, Jun 3, 2011 at 6:35 PM, Peter Hurley <[email protected]> wrote:
>> > Although it's not at all clear from your posts, I'm assuming that you're
>> > using a raw HCI socket in a user-space utility.
>
> Are you using a raw HCI socket?
>
>> > My guess is that the btusb kernel driver is dropping your ACL packet
>> > without transmitting it. If you look at drivers/bluetooth/btusb.c. in
>> > the btusb_send_frame() function, you'll see:
>> >
>> > ? ? ? ?switch (bt_cb(skb)->pkt_type) {
>> > ? ? ? ? ? ? ? ?....
>> > ? ? ? ?case HCI_ACLDATA_PKT:
>> > ? ? ? ? ? ? ? ?if (!data->bulk_tx_ep || hdev->conn_hash.acl_num < 1)
>> > ? ? ? ? ? ? ? ? ? ? ? ?return -ENODEV;
>> >
>> > The only way that hdev->conn_hash.acl_num will be 1+ is if the
>> > establishment of an ACL connection went through hci_connect() with a
>> > connection type of ACL_LINK. This code was added when SCO support was
>> > added back in Aug 2008.
>
> My point here is this is probably a bug in btusb - raw HCI sockets
> should be able to send *any* packet.
>
> If you can confirm you're on a raw HCI socket, I can explore a fix but
> you'll be the test subject <grin>.
>
> Let me know,
> Peter Hurley
>
>
>