[Bluez-devel] I've found a bug in sdp_cstate_get() function.

[Bluez-devel] I've found a bug in sdp_cstate_get() function.

[이주영]

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Hi,
 
I've found a bug in sdp_cstate_get() function.
(bluez-utils/dist/sdpd/request.c)
 -> memcpy(cstate, (sdp_cont_state_t *)pdata, sizeof(sdp_cont_state_t));
When running this code, "hcid daemon crash" occurred.(memory alignment error)
I think there's a bug with (sdp_cont_state_t *)pdata in sdp_cstate_get() function.
I fixed this code.
 -> memcpy(cstate, pdata, sizeof(sdp_cont_state_t));
Now, hcid daemon doesn't die.
 
 
tkakel님의 블로그
안녕하세요.

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Re: [Bluez-devel] I've found a bug in sdp_cstate_get() function.

[Marcel Holtmann]

Hi,

> I've found a bug in sdp_cstate_get() function.
> (bluez-utils/dist/sdpd/request.c)
>  -> memcpy(cstate, (sdp_cont_state_t *)pdata,  
> sizeof(sdp_cont_state_t));
> When running this code, "hcid daemon crash" occurred.(memory  
> alignment error)
>
> I think there's a bug with (sdp_cont_state_t *)pdata in  
> sdp_cstate_get() function.
> I fixed this code.
>  -> memcpy(cstate, pdata, sizeof(sdp_cont_state_t));
> Now, hcid daemon doesn't die.
>

which version? This should have been fixed by now. Either in the  
latest bluez-utils-3.28 or the CVS.

Regards

Marcel


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RE: Re: [Bluez-devel] I've found a bug in sdp_cstate_get() function.

[이주영]

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Hi,
 
The version is latest bluez-utils-3.28.
 
Thanks.
 
Regards
jooyoung.
 
-----Original Message-----
From: "Marcel Holtmann"<marcel@holtmann.org> 
To: "이주영"<tkakel@naver.com>; "BlueZ development"<bluez-devel@lists.sourceforge.net>
Cc: 
Sent: 08-03-20(목) 01:47:11
Subject: Re: [Bluez-devel] I've found a bug in sdp_cstate_get() function.
Hi,
> I've found a bug in sdp_cstate_get() function.
> (bluez-utils/dist/sdpd/request.c)
> -> memcpy(cstate, (sdp_cont_state_t *)pdata, 
> sizeof(sdp_cont_state_t));
> When running this code, "hcid daemon crash" occurred.(memory 
> alignment error)
>
> I think there's a bug with (sdp_cont_state_t *)pdata in 
> sdp_cstate_get() function.
> I fixed this code.
> -> memcpy(cstate, pdata, sizeof(sdp_cont_state_t));
> Now, hcid daemon doesn't die.
>
which version? This should have been fixed by now. Either in the 
latest bluez-utils-3.28 or the CVS.
Regards
Marcel
 
 
tkakel님의 블로그
안녕하세요.

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[Bluez-devel] RFCOMM sockets

[Fabrizio Guglielmino]

Hi all,
I have 3 embedded devices with temperature sensor. This devices are 
accessed from a pc with linux reading data with rfcomm socket, isn't 
need to make sdp query for channel because rfcomm channels are 
statically assigned (it's lab equipment).

I need to read the 3 devices almost at same time and I've done a little 
C application using GLib IOChannels and non-blocking socket to read
data from the devices. All works fine but if a device it's off the 
connection to the others it's slow, my impression is it waits timeout 
from the first device.
I can understand why if I have 3 rfcomm connections issued in 
non-blocking way these influences each other.

I'm using BlueZ 3.22 on a debian 4.0 whith kernel version 2.6.22

Thanks

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Re: [Bluez-devel] I've found a bug in sdp_cstate_get() function.

[Marcel Holtmann]

Hi,

> The version is latest bluez-utils-3.28.
>
>

we fixed it in the CVS. So that should be taken care of when we  
release bluez-utils-3.29.

Regards

Marcel


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Re: [Bluez-devel] RFCOMM sockets

[Marcel Holtmann]

Hi Fabrizio,

> I have 3 embedded devices with temperature sensor. This devices are
> accessed from a pc with linux reading data with rfcomm socket, isn't
> need to make sdp query for channel because rfcomm channels are
> statically assigned (it's lab equipment).
>
> I need to read the 3 devices almost at same time and I've done a  
> little
> C application using GLib IOChannels and non-blocking socket to read
> data from the devices. All works fine but if a device it's off the
> connection to the others it's slow, my impression is it waits timeout
> from the first device.
> I can understand why if I have 3 rfcomm connections issued in
> non-blocking way these influences each other.

because if you have to open ACL baseband connections, then it takes  
time. Especially when they fail. The baseband connections can not be  
done in parallel when it is the same host controller. You can use  
hciconfig to change the page timeout.

Regards

Marcel


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