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1.12.0 error: failed to list interfaces: getifaddrs: Address family not supported by protocol #350

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dvzrv opened this issue Nov 21, 2020 · 1 comment · Fixed by #351
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1.12.0 error: failed to list interfaces: getifaddrs: Address family not supported by protocol #350

dvzrv opened this issue Nov 21, 2020 · 1 comment · Fixed by #351

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@dvzrv
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dvzrv commented Nov 21, 2020

Hi! I'm packaging unbound for Arch Linux.
I am currently trying to upgrade the package to 1.12.0. Unfortunately I am running into serious issues with the service right on start.
With my configuration file, compatible with 1.11.0 I am trying to start unbound.service, but it returns:

unbound[1610946:0] error: failed to list interfaces: getifaddrs: Address family not supported by protocol
unbound[1610946:0] fatal error: could not open ports

I see that f6a527c has changed the behavior of the *interface: settings in the configuration. Unfortunately, this doesn't seem to work out of the box with the systemd unit anymore (or because of another problem?).

Even if I provide interface names to the respective *interface: configuration settings, I get the above error message.
@dvzrv
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dvzrv commented Nov 21, 2020

Okay, after some investigation I have found the issue.

It seems that the systemd service now requires AF_NETLINK in the RestrictAddressFamilies setting for the aforementioned changes to work and the service not to fail right away.

I'll open a pull request for this.

dvzrv added a commit to dvzrv/unbound that referenced this issue Nov 21, 2020
@dvzrv
Add AF_NETLINK to set of allowed socket address families
c48f014 
contrib/unbound{,_portable}.service.in:
With the changes introduced in f6a527c
it is now necessary to also allow access to the AF_NETLINK socket
address family to be able to get information from interfaces.

Without the AF_NETLINK address family the systemd service errors with:

```
error: failed to list interfaces: getifaddrs: Address family not
supported by protocol
```

Fixes NLnetLabs#350
@dvzrv dvzrv mentioned this issue Nov 21, 2020
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wcawijngaards added a commit that referenced this issue Nov 23, 2020
@wcawijngaards
Changelog notes for #350 and #351
097e530 
- Merge #351 from dvzrv: Add AF_NETLINK to set of allowed socket
  address families.
- Fix #350: with the AF_NETLINK permission, to fix 1.12.0 error:
  failed to list interfaces: getifaddrs: Address family not
  supported by protocol.
@lbschenkel lbschenkel mentioned this issue Mar 28, 2022
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Add AF_NETLINK to set of allowed socket address families dvzrv/unbound
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@dvzrv