connectionless L2CAP
Hello,
how can I broadcast a data packet ?
And the connectionless mode of the l2test isn't actually connectionless, for example:
$ ./l2test -D -N 1 -s 00:04:3E:81:14:F8 l2test[1279]: Can't connect: Host is down (112)
I just want to broadcast a data packet and I don't care if the remote end got it or not (i.e. connectionless ACL). Will someone please explain me how can I do that and also a programming example would be great.
Thanks
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Marcel Holtmann
maintainerHi Aleksandar,
Quoted 9 lines
how can I broadcast a data packet ?
And the connectionless mode of the l2test isn't actually connectionless, for example:$ ./l2test -D -N 1 -s 00:04:3E:81:14:F8 l2test[1279]: Can't connect: Host is down (112)I just want to broadcast a data packet and I don't care if the remote end got it or not (i.e. connectionless ACL). Will someone please explain me how can I do that and also a programming example would be great.
this is not really working, because if there is no ACL link, then there exists no piconet. And without a piconet no air transmission.
Regards
Marcel
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Hello Marcel,
I'm actually trying to send a data packet between 2 bluetooth devices over 100 meters. I haven't went really deep into the bluetooth specs, but I assume that because of the long range a connection might not be possible, so that's why I just want to broadcast some packets and hope that some will arrive at the other end. Is this possible ?
Btw./l2test with 00:00:00:00:00:00 fails too, but the bluetooth baseband specification section 3.3 says that "ACL packets not addressed to a specific slave are considered as broadcast packets and are read by every slave". I have 1 device in range (I can see it with hcitool scan, l2test succeeds with that device).
Thanks
Quoted 23 lines · Marcel Holtmann
Hi Aleksandar,
Quoted 8 lines
how can I broadcast a data packet ?
And the connectionless mode of the l2test isn't actually connectionless, for example:$ ./l2test -D -N 1 -s 00:04:3E:81:14:F8 l2test[1279]: Can't connect: Host is down (112)I just want to broadcast a data packet and I don't care if the remote end got it or not (i.e. connectionless ACL). Will someone please explain me how can I do that and also a programming example would be great.
this is not really working, because if there is no ACL link, then there exists no piconet. And without a piconet no air transmission.
Regards
Marcel
Quoted 12 lines
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Marcel Holtmann
maintainerHi Aleksandar,
Quoted 5 lines
I'm actually trying to send a data packet between 2 bluetooth devices over 100 meters. I haven't went really deep into the bluetooth specs, but I assume that because of the long range a connection might not be possible, so that's why I just want to broadcast some packets and hope that some will arrive at the other end. Is this possible ?
what's the problem with 100 meters range. Use a pair of class 1 dongles and you are fine.
Quoted 5 lines
Btw./l2test with 00:00:00:00:00:00 fails too, but the bluetooth baseband specification section 3.3 says that "ACL packets not addressed to a specific slave are considered as broadcast packets and are read by every slave". I have 1 device in range (I can see it with hcitool scan, l2test succeeds with that device).
You still need the piconet. No piconet no data transfer over the air.
Regards
Marcel
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