Comments (9)
muka
commented on July 29, 2024
Hi David
have you added the dbus permissions definition files ?
Samples are here https://github.com/muka/go-bluetooth/tree/master/scripts
If not the case, can you try to have a setup with 5.50 and run a plain example to see if this is still happening?
Let me know so we can investigate further
Thanks
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davidknezic
commented on July 29, 2024
Hi @muka, thanks for helping out!
Yes, I have removed the standard bluetooth permissions file and replaced it with the two that are in the scripts folder (with some additions):
/etc/dbus-1/system.d/dbus-go-bluetooth-service.conf
<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN" "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
<busconfig>
<policy user="root">
<allow own="go.bluetooth"/>
<allow send_destination="go.bluetooth"/>
<allow send_destination="org.bluez"/>
</policy>
<policy at_console="true">
<allow own="go.bluetooth"/>
<allow send_destination="go.bluetooth"/>
<allow send_destination="org.bluez"/>
</policy>
<policy context="default">
<deny send_destination="go.bluetooth"/>
</policy>
</busconfig>
/etc/dbus-1/system.d/dbus-go-bluetooth-dev.conf
<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN" "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
<busconfig>
<policy user="root">
<allow own="go.bluetooth"/>
<allow own_prefix="go.bluetooth"/>
<allow send_destination="go.bluetooth" send_interface="go.bluetooth"/>
<allow send_destination="go.bluetooth" send_interface="org.freedesktop.DBus.Introspectable"/>
<allow send_destination="go.bluetooth" send_interface="org.freedesktop.DBus.Properties"/>
<allow send_destination="go.bluetooth" send_interface="org.freedesktop.DBus.ObjectManager"/>
<allow send_destination="go.bluetooth"/>
<allow own="org.bluez"/>
<allow own_prefix="org.bluez"/>
<allow send_destination="org.bluez" send_interface="org.bluez"/>
<allow send_destination="org.bluez" send_interface="org.freedesktop.DBus.Introspectable"/>
<allow send_destination="org.bluez" send_interface="org.freedesktop.DBus.Properties"/>
<allow send_destination="org.bluez" send_interface="org.freedesktop.DBus.ObjectManager"/>
<allow send_destination="org.bluez"/>
<allow send_interface="org.freedesktop.DBus.ObjectManager"/>
<allow send_interface="org.freedesktop.DBus.Properties"/>
<allow send_interface="org.freedesktop.DBus.Introspectable"/>
<allow send_interface="org.bluez.GattCharacteristic1"/>
<allow send_interface="org.bluez.GattDescriptor1"/>
<allow send_interface="org.bluez.GattService1"/>
<allow send_interface="org.bluez.GattManager1"/>
<allow send_interface="org.bluez.LEAdvertisement1"/>
<allow send_interface="org.bluez.Agent1"/>
<allow send_interface="org.bluez.MediaEndpoint1"/>
<allow send_interface="org.bluez.MediaPlayer1"/>
<allow send_interface="org.bluez.Profile1"/>
<allow send_interface="org.bluez.LEAdvertisingManager1"/>
</policy>
<policy at_console="true">
<allow send_destination="org.bluez"/>
</policy>
<policy context="default">
</policy>
</busconfig>
I've extended the dev file a little, trying to resolve my issue, adding the following lines to the user=root policy:
<allow send_interface="org.bluez.LEAdvertisement1"/>
<allow send_interface="org.bluez.Agent1"/>
<allow send_interface="org.bluez.MediaEndpoint1"/>
<allow send_interface="org.bluez.MediaPlayer1"/>
<allow send_interface="org.bluez.Profile1"/>
<allow send_interface="org.bluez.LEAdvertisingManager1"/>
I run the app as root.
The following was the original that was added by the yocto build. I've replaced it entirely because I got a couple of permission errors while using go-bluetooth:
/etc/dbus-1/system.d/bluetooth.conf
<!-- This configuration file specifies the required security policies
for Bluetooth core daemon to work. -->
<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
"http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
<busconfig>
<!-- ../system.conf have denied everything, so we just punch some holes -->
<policy user="root">
<allow own="org.bluez"/>
<allow send_destination="org.bluez"/>
<allow send_interface="org.bluez.Agent1"/>
<allow send_interface="org.bluez.MediaEndpoint1"/>
<allow send_interface="org.bluez.MediaPlayer1"/>
<allow send_interface="org.bluez.Profile1"/>
<allow send_interface="org.bluez.GattCharacteristic1"/>
<allow send_interface="org.bluez.GattDescriptor1"/>
<allow send_interface="org.bluez.LEAdvertisement1"/>
<allow send_interface="org.freedesktop.DBus.ObjectManager"/>
<allow send_interface="org.freedesktop.DBus.Properties"/>
</policy>
<policy at_console="true">
<allow send_destination="org.bluez"/>
</policy>
<!-- allow users of lp group (printing subsystem) to
communicate with bluetoothd -->
<policy group="lp">
<allow send_destination="org.bluez"/>
</policy>
<policy context="default">
<deny send_destination="org.bluez"/>
</policy>
</busconfig>
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muka
commented on July 29, 2024
Can you have a try with an example from the repository? It could be easier for me to replicate.
from go-bluetooth.
davidknezic
commented on July 29, 2024
Yes, sure! Just tried the service example. It leads to the same error.
root@raspberrypi0-wifi:/data# ./service
INFO[0000] Application started, waiting for connections
DEBU[0000] Registering app /go_bluetooth/example/service
DEBU[0000] Registering service on hci0 (/org/bluez/advertisement/hci0)
WARN[0000] Advertisment limit of 31 bytes may have been exceeded. Consider not exposing all services IDs with `CreateService(props, false)`
error time=1552893110.036474 sender=org.freedesktop.DBus -> destination=:1.0 error_name=org.freedesktop.DBus.Error.ServiceUnknown reply_serial=491
string "The name :1.16 was not provided by any .service files"
error time=1552893110.044188 sender=:1.16 -> destination=:1.0 error_name=org.freedesktop.DBus.Error.UnknownInterface reply_serial=492
string "Object does not implement the interface"
error time=1552893110.073839 sender=:1.16 -> destination=:1.0 error_name=org.freedesktop.DBus.Error.UnknownMethod reply_serial=494
string "Unknown / invalid method"
error time=1552893110.074099 sender=org.freedesktop.DBus -> destination=:1.16 error_name=org.freedesktop.DBus.Error.AccessDenied reply_serial=17
string "Rejected send message, 1 matched rules; type="error", sender=":1.16" (uid=0 pid=498 comm="./service ") interface="(unset)" member="(unset)" error name="org.freedesktop.DBus.Error.UnknownMethod" requested_reply="0" destination=":1.0" (uid=0 pid=317 comm="/usr/libexec/bluetooth/bluetoothd ")"
INFO[0000] Application registered and advertising.
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muka
commented on July 29, 2024
Seems an issue in the configuration of the system / yocto build.
To recap, your user is root (matching user=root policy) and your exposed service map in dbus to go.bluetooth.
In the code you could try to play with the object name / object path
https://github.com/the-lightning-land/sweetd/pull/14/files#diff-2650556a5ae8d1b4833240d0c10b6238R15
and ensure they match with the one in your config eg.
<allow own="go.bluetooth"/>
<allow own_prefix="go.bluetooth"/>
Nice project the blockchain based candy dispenser, I want one of them! π
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davidknezic
commented on July 29, 2024
In the code you could try to play with the object name / object path
That's a good suggestion, I will try to adjust the object name / object path and see if the policies match.
I find it very hard to find information regarding the dbus gatt API and how to use it to expose BLE services.
Is there anything I have to keep in mind when selecting objectName and objectPath? In the example the objectName is set to org.bluez, is that mandatory? Also the objectPath in the example is set to /go_bluetooth/example/service. Does that map to the <allow own="go.bluetooth"/> in some way?
I really appreciate your help @muka π
Nice project the blockchain based candy dispenser
Thank you!
I want one of them! π
I think we can make that happen
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davidknezic
commented on July 29, 2024
Hi @muka, just wanted to update you that I wasn't able to identify the problem so far. That's why I've tried downgrading the bluez5 package to 5.47. With that everything works very well.
I hope I'll have time again to investigate what changes between 5.47 and 5.50 there were that caused my problems, it won't be a huge priority though.
If someone stumbles over this issue and has had experience with go-bluetooth and bluez 5.50, it would be interesting to learn how it went!
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muka
commented on July 29, 2024
I will check as on a plain Ubuntu seems to work. Can you share something I
can try, also on a py eventually
Thanks
sent from my phone
β¦On Fri, Mar 29, 2019, 11:51 David KneziΔ ***@***.***> wrote:
Hi @muka <https://github.com/muka>, just wanted to update you that I
wasn't able to identify the problem so far. That's why I've tried
downgrading the bluez5 package to 5.47. With that everything works very
well.
I hope I'll have time again to investigate what changes between 5.47 and
5.50 there were that caused my problems, it won't be a huge priority though.
If someone stumbles over this issue and has had experience with
go-bluetooth and bluez 5.50, it would be interesting to learn how it went!
β
You are receiving this because you were mentioned.
Reply to this email directly, view it on GitHub
<#69 (comment)>,
or mute the thread
<https://github.com/notifications/unsubscribe-auth/AA-VVSt6D1EZnaAswxMnrNKVWPqTCraOks5vbfA6gaJpZM4cFZPb>
.
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muka
commented on July 29, 2024
Hi, after upgrading to ubuntu 19.04 I was having the same issue on 5.50.
To overcome I updated go deps (just updated in master) and added back the links for dbus configurations (as described in README)
I am closing the issue, please reopen if needed
Thank you
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