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idea about Bluetooth version 4 development for all BSD communities

sidetone

Aspiring Daemon

Thanks: 298
Messages: 879

#1
The BSD community, not only FreeBSD, should look into supporting Bluetooth version 4 drivers. Bluetooth version 4 dongles are backward compatible with devices using previous Bluetooth versions, and they are inexpensive. It's not worth wasting time on Bluetooth version 2 and 3 dongle drivers.

The state of Bluetooth sourcecode in FreeBSD CURRENT is at https://svnweb.freebsd.org/base/head/usr.bin/bluetooth/ . This may take years, but eventually it would be nice.

I've heard for a while that OpenBSD dropped Bluetooth version 1, because of complexities, and picking up on Version 4, which has improvements over previous versions, would be a better use of resources.
 

Snurg

Aspiring Daemon

Thanks: 324
Messages: 795

#2
Current standard is Bluetooth 5.0.
It is very complex. The standard document consists of 2822 pages.

A good "short" introduction into current Bluetooth is the NIST Guide to Bluetooth Security.
It includes a good overview of the security issues of Bluetooth versions up to 4.2, and at the end of the document are plenty of interesting links.

I guess implementing this would necessitate a major donation from a big player, who would have interest in this being implemented.
Maybe something could be taken from Android.
Google has made that component completely open source.
And then it depends on whether this is possible with the stuff being Apache 2.0 licensed.
 

sidetone

Aspiring Daemon

Thanks: 298
Messages: 879

#3
I didn't realize 5.0 came out. Version 4.0 would be practical as one that takes care of device versions 1 through 4. I see 5.0 in the future, but I'd like to see 4.0 as something that allows everyone to have easy access to it as inexpensive, and backward compatible.

https://www.bluetooth.com/~/media/files/specification/bluetooth-5-faq.ashx?la=en tells about the backward compatibility of Bluetooth 5. For Low Energy Bluetooth, Version 5 is only compatible with Bluetooth 4. Other Bluetooth devices starting at Version 1.1 will be compatible with a Bluetooth version 5 dongle.
 

sidetone

Aspiring Daemon

Thanks: 298
Messages: 879

#4
I was thinking that there be a Bluetooth Version 4 driver for a dongle that supports all devices from versions 1 through 4. Then a Bluetooth driver split off and be for all Low Energy Bluetooth, including version 5. The end result would be two Bluetooth drivers a low energy driver, and a traditional driver, where both cover few dongle versions, but devices of all versions. Then these two drivers might have to work together on the same infrastructure, if one dongle is compatible with both types of Bluetooth protocols.
 

Oko

Daemon

Thanks: 738
Messages: 1,611

#5

Snurg

Aspiring Daemon

Thanks: 324
Messages: 795

#6
Oko: This is the official reasoning for removing it:
... hackathon tradition of deleting a lotcode that most people probably never even knew existed. Say goodbye to ,,, bluetooth. Of these,you may possibly miss bluetooth support. Unfortunately, the current code doesn't work and isn't structured properly to encourage much future development.
Meanwhile, BlueZ supports 4.2 and probably will support 5.0 soon. But it is LGPL, so...
 

sidetone

Aspiring Daemon

Thanks: 298
Messages: 879

#7
There were lots of flaws in Bluetooth 1 and 2. I said that OpenBSD dropped Bluetooth 1, because of complexities. (I was aware all Bluetooth support was dropped from it too). 4 is supposed to be better. I think OpenBSD will never have versions 1 through 3 again, but I'm not sure about 4, 5 or future versions. Even so, there are other OS'es that could use it.

I wouldn't mind a LGPL Bluetooth driver in ports, until if a BSD like one comes along.
 

sidetone

Aspiring Daemon

Thanks: 298
Messages: 879

#8
Bluetooth Low Energy (BLE), which is only available for Bluetooth 4 and 5, is worked on in current:
https://svnweb.freebsd.org/base/head/usr.sbin/bluetooth/
https://svnweb.freebsd.org/base/head/sys/netgraph/bluetooth/

I remember Bluetooth 4 being backward compatible with drivers down to version 1. Bluetooth 5 is reverse compatible down to 1.1 (https://www.bluetooth.com/~/media/files/specification/bluetooth-5-faq.ashx?la=en), but there is already a 1.1 driver. I read (not through official sources) that version 1.2 on are more secure. 2.1 has device pairing that 2.0 doesn't have. Perhaps the 1.1 driver should be left as is. Traditional data rate drivers from Bluetooth 4 and 5 dongles should be for reverse compatibility of devices 2.1 on.

Aside from the existing drivers that are for up to 1.2, there should be two generic drivers: one for Bluetooth LE, and one for reverse compatibility for traditional data rate protocols from versions newer than 4 to be backward compatible down to 2.1.
 

sidetone

Aspiring Daemon

Thanks: 298
Messages: 879

#10
Are you sure that more than exchanging the license was changed?
Snurg, I'm not sure. It does look like what you said.
Shouldn't we vote for removal instead, like in OpenBSD?
I wouldn't complain if all Bluetooth before 2.0 were removed, which is all there is. Bluetooth before 2.0 is obsolete anyway. I'd like to see devices compatible with Bluetooth 2.1 that use device pairing and on, from Bluetooth 4 and 5 dongles. Who knows, soon enough everyone will sell keyboards and other devices with Bluetooth 4.0 and on.
 
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