dnsdist - Preserve SuffixMatchNode Names in ShowRules()

[vecinohk]

When using a named SuffixMatchNode, for example:

private_ptr = makeSuffixMatchNode({
    "168.192.in-addr.arpa.",
    "16.172.in-addr.arpa.",
    ...
})

and then:

SuffixMatchNodeRule(private_ptr)

ShowRules() currently expands the node into the complete list of suffixes:

(qname in c.f.ip6.arpa., d.f.ip6.arpa., 8.e.f.ip6.arpa., ...)

This can make rule listings very long and difficult to read.

It would be useful if SuffixMatchNode could optionally retain its Lua variable/name and ShowRules() could display:

(qname in private_ptr)

The full suffix list could then be available through a separate command or optional verbose output.

This would improve readability and make large dnsdist configurations much easier to manage and troubleshoot.

[rgacogne]

If you pass true as a second parameter to SuffixMatchNodeRule it will not list the suffixes. You can then pass a name to addAction and friends to make it easier to identify the rule.
Retaining the Lua variable name is not possible because it is not know to the C++ code.

[vecinohk]

Thank you, and I'm sorry for the silly question.

https://www.dnsdist.org/reference/selectors.html?h=suffixmatchnoderule#lua-SuffixMatchNodeRule
quiet (bool) – Do not display the list of matched domains in Rules. Default is false.