Dear bluetooth community,
I am trying to create a pairing agent using bluez API in C.
The problem that I am trying to solve is autopairing from a known list
of MAC addresses (i.e auto-accept pairing for known devices in the
list).
I tried registering a bluetooth agent with NoInputNoOutput capability.
However, when I try to access Pair, I receive Authentication Failed
error.
Another problem here is that even if I call RequestDefaultAgent after
registration, it seems that the bluetooth settings agent (UI) is still
called and prompts me to yes/no.
I have the following questions:
From the api doc:
"Special permission might be required to become the default agent"
- Is there anything else I have to do to acquire these permissions?
- The return value from RequestDefaultAgent and RegisterAgent is void.
How can I check whether my agent has been registered/became default?
- I also tried trusting the discovered device after registering the
agent and trying to make it default, which didn't make any difference
- is this required?
Here's my source code:
https://pastebin.com/Wj3rdHy3
Thank you for your time.
Best regards,
Mihai
On Tue, 2021-03-02 at 18:07 +0100, Mihai Emilian wrote:
> Dear bluetooth community,
>
> I am trying to create a pairing agent using bluez API in C.
>
> The problem that I am trying to solve is autopairing from a known list
> of MAC addresses (i.e auto-accept pairing for known devices in the
> list).
>
> I tried registering a bluetooth agent with NoInputNoOutput capability.
> However, when I try to access Pair, I receive Authentication Failed
> error.
>
> Another problem here is that even if I call RequestDefaultAgent after
> registration, it seems that the bluetooth settings agent (UI) is still
> called and prompts me to yes/no.
>
> I have the following questions:
>
> From the api doc:
> "Special permission might be required to become the default agent"
>
> - Is there anything else I have to do to acquire these permissions?
> - The return value from RequestDefaultAgent and RegisterAgent is void.
> How can I check whether my agent has been registered/became default?
> - I also tried trusting the discovered device after registering the
> agent and trying to make it default, which didn't make any difference
> - is this required?
You might want to look at ready made pairing tools, such as bt-agent in
bluez-tools:
https://github.com/khvzak/bluez-tools
This is an example of using static pincode with unattended pairing:
https://github.com/hadess/CHIP-bluetooth-speaker/blob/master/setup.sh#L73
The bt-agent pin code file can accommodate using bluetooth addresses,
so something like:
AA:BB:CC:DD:EE:FF *
in the pin code file should work.
Cheers
>
> Here's my source code:
> https://pastebin.com/Wj3rdHy3
>
> Thank you for your time.
>
> Best regards,
> Mihai