Cannot mixed IPv4 and IPv6

[pixelshot91]

In the README, it is written we can mix IPv4 and IPv6:

key	description
prefixes	Array of prefixes, mixed IPv4 and IPv6. At least 1 prefix is required per service

https://github.com/skoef/birdwatcher/blob/master/README.md?plain=1#L107

But in all Bird versions (1.6, 2.0, 3.0) the doc says a set cannot mix the two

It is not possible to mix IPv4 and IPv6 prefixes in a prefix set. It is currently possible to mix IPv4 and IPv6 addresses in an ip set, but that behavior may change between versions without any warning; don't do it unless you are more than sure what you are doing. (Really, don't do it.)

http://bird.network.cz/?get_doc&v=30&f=bird-5.html#ss5.2

And indeed, bird complains with:

bird: /etc/bird/birdwatcher.conf:7:2 Mixed IPv4/IPv6 prefixes in prefix set

As I understand it, if one wants to mix the two, one shoud create two functions ?
Should the README be updated ?

[skoef]

Hi @pixelshot91,

first of all, thank you for wanting to use birdwatcher! You're absolutely right that BIRD doesn't allow both IPv4 and IPv6 addresses in the same prefix set, nice catch! However, this behavior changed between 2.0.7 and 2.0.8, before 2.0.8 this wás allowed and I have not been using BIRD after 2.0.4 I think.

Anyway, I will think of either a fix or update the README.md for this!