[Bluez-devel] PAN Attributes

[Bluez-devel] PAN Attributes

[Claudio Takahasi]

Hi folks,

Which modification should be done in order to get
NAP/GN attribute values?

I need get the NAP/GN IPv4Subnet attribute from a PANU.

I found following structure in the bluez source code, but I didn't find 
references!

static struct attrib_def pan_attrib_names[] = {
        { 0x200, "IpSubnet", NULL, 0 },         /* Obsolete ??? */
        { 0x30A, "SecurityDescription", NULL, 0 },
        { 0x30B, "NetAccessType", NULL, 0 },
        { 0x30C, "MaxNetAccessrate", NULL, 0 },
        { 0x30D, "IPv4Subnet", NULL, 0 },
        { 0x30E, "IPv6Subnet", NULL, 0 },
};


Thanks in advance,
Claudio.


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[Bluez-users] Re: [Bluez-devel] PAN Attributes

[Marcel Holtmann]

Hi Claudio,

> Which modification should be done in order to get
> NAP/GN attribute values?

to retrieve them from a remote side or to add them to your PAN server?

Regards

Marcel




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[Bluez-users] Re: [Bluez-devel] PAN Attributes

[Claudio Takahasi]

Hi Marcel,

Currently, I think that PAN attributes are not being exported(registered)
at server side. Therefore, I need add to NAP/GN and retrieve from PANU.

I didn't find references for them. "pan_attrib_names" structure is used
only in the uuid16_names and at the moment I don't know how change
the code to make these information available.

My objective is try enhance/make easy the PAN setup. Currently, the
user has to be aware of the PAN role and setup the IP address in
both side(master and slave).

In the PAN Profile, Zeroconf is one of  suggested standard to solve
the IP assigment problem. Zeroconf generates a pseudo random IP.
However, this approach is NOT feasible for Bluetooth PAN. For NAP
scenario, a route must be added in the PANU to reach the gateway.
But the PANU doesn't know the NAP IP address!!!

Using the IPv4Subnet attribute and using a rule for gateway IP
assigment the PANU can be able to get the NAP IP. Another aproach
is add one attribute like "gateway address", but this implies in PAN
profile changes and I think that this is not a simple process.

Regards,
Claudio





Marcel Holtmann wrote:

>Hi Claudio,
>
>  
>
>>Which modification should be done in order to get
>>NAP/GN attribute values?
>>    
>>
>
>to retrieve them from a remote side or to add them to your PAN server?
>
>Regards
>
>Marcel
>
>
>
>
>-------------------------------------------------------
>SF email is sponsored by - The IT Product Guide
>Read honest & candid reviews on hundreds of IT Products from real users.
>Discover which products truly live up to the hype. Start reading now.
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>Bluez-users mailing list
>Bluez-users@lists.sourceforge.net
>https://lists.sourceforge.net/lists/listinfo/bluez-users
>  
>



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Re: [Bluez-users] Re: [Bluez-devel] PAN Attributes

[Marcel Holtmann]

Hi Claudio,

> Currently, I think that PAN attributes are not being exported(registered)
> at server side. Therefore, I need add to NAP/GN and retrieve from PANU.

the pand creates the SDP record if it is executes in server mode.

> I didn't find references for them. "pan_attrib_names" structure is used
> only in the uuid16_names and at the moment I don't know how change
> the code to make these information available.
> 
> My objective is try enhance/make easy the PAN setup. Currently, the
> user has to be aware of the PAN role and setup the IP address in
> both side(master and slave).
> 
> In the PAN Profile, Zeroconf is one of  suggested standard to solve
> the IP assigment problem. Zeroconf generates a pseudo random IP.
> However, this approach is NOT feasible for Bluetooth PAN. For NAP
> scenario, a route must be added in the PANU to reach the gateway.
> But the PANU doesn't know the NAP IP address!!!
> 
> Using the IPv4Subnet attribute and using a rule for gateway IP
> assigment the PANU can be able to get the NAP IP. Another aproach
> is add one attribute like "gateway address", but this implies in PAN
> profile changes and I think that this is not a simple process.

Why don't you create a bridge and put a DHCP server on the bridge
interface? This is working fine on my systems.

Regards

Marcel




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