2004-10-18 17:07:54

by Stefan Mischke

[permalink] [raw]
Subject: [Bluez-devel] Piconet Routing

Hello!

Since Bluetooth uses Time Division Duplex, a slave is not allowed to
talk to another slave in the same Piconet. The logical consequence must
be that the data is routed over the master. I've used l2test to check if
l2cap does this kind of routing automatically. It doesn't but rather
creates a new, direct acl link to the remote slave device (scatternet).
I don't know how it is with rfcomm, but I suppose it's the same. My
question: Is there any automatic Piconet Routing inside BlueZ or does
one have to implement it by oneself?

Regards
Stefan



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2004-10-19 09:11:21

by GUILLON Gabriel

[permalink] [raw]
Subject: Re: [Bluez-devel] Piconet Routing

Take a look at btchat: it does routing through bluetooth

Stefan Mischke a =E9crit :
> Hello!
>=20
> Since Bluetooth uses Time Division Duplex, a slave is not allowed to=20
> talk to another slave in the same Piconet. The logical consequence must=
=20
> be that the data is routed over the master. I've used l2test to check i=
f=20
> l2cap does this kind of routing automatically. It doesn't but rather=20
> creates a new, direct acl link to the remote slave device (scatternet).=
=20
> I don't know how it is with rfcomm, but I suppose it's the same. My=20
> question: Is there any automatic Piconet Routing inside BlueZ or does=20
> one have to implement it by oneself?
>=20
> Regards
> Stefan
>=20
>=20
>=20
> -------------------------------------------------------
> This SF.net email is sponsored by: IT Product Guide on ITManagersJourna=
l
> Use IT products in your business? Tell us what you think of them. Give =
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>=20

--=20
"Everything is funny, if you wait long enough"

Gab

Dieu, dans sa grande cl=E9mence, a invent=E9 l'alcool pour que les moches
aussi puissent baiser.
- Woody Allen -


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2004-10-18 17:33:42

by Marcel Holtmann

[permalink] [raw]
Subject: Re: [Bluez-devel] Piconet Routing

Hi Stefan,

> Since Bluetooth uses Time Division Duplex, a slave is not allowed to
> talk to another slave in the same Piconet. The logical consequence must
> be that the data is routed over the master. I've used l2test to check if
> l2cap does this kind of routing automatically. It doesn't but rather
> creates a new, direct acl link to the remote slave device (scatternet).
> I don't know how it is with rfcomm, but I suppose it's the same. My
> question: Is there any automatic Piconet Routing inside BlueZ or does
> one have to implement it by oneself?

you must do it by yourself, because even if the master manages to put
all devices into the same piconet the connections are point to point.

Regards

Marcel




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