reverse zone: fix Normalize (#4621)

Make normalize return multiple "hosts" (= reverse zones) when a
non-octet boundary cidr is given.

Added pkg/cidr package that holds the cidr calculation routines; felt
they didn't really fit dnsutil.

This change means the IPNet return parameter isn't needed, the hosts are
all correct. The tests that tests this is also removed: TestSplitHostPortReverse
The fallout was that zoneAddr _also_ doesn't need the IPNet member, that
in turn make it visible that zoneAddr in address.go duplicated a bunch
of stuff from register.go; removed/refactored that too.

Created a plugin.OriginsFromArgsOrServerBlock to help plugins do the
right things, by consuming ZONE arguments; this now expands reverse
zones correctly. This is mostly mechanical.

Remove the reverse test in plugin/kubernetes which is a copy-paste from
a core test (which has since been fixed).

Remove MustNormalize as it has no plugin users.

This change is not backwards compatible to plugins that have a ZONE
argument that they parse in the setup util.

All in-tree plugins have been updated.

Signed-off-by: Miek Gieben <miek@miek.nl>
This commit is contained in:
Miek Gieben 2021-05-17 22:19:54 +02:00 committed by GitHub
parent 5409379648
commit 5f41d8eb1f
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32 changed files with 259 additions and 510 deletions

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@ -31,10 +31,11 @@ func (f F) Through(qname string) bool {
// setZones will set zones in f.
func (f *F) setZones(zones []string) {
z := []string{}
for i := range zones {
zones[i] = plugin.Host(zones[i]).Normalize()
z = append(z, plugin.Host(zones[i]).Normalize()...)
}
f.Zones = zones
f.Zones = z
}
// SetZonesFromArgs sets zones in f to the passed value or to "." if the slice is empty.
@ -47,7 +48,7 @@ func (f *F) SetZonesFromArgs(zones []string) {
}
// Equal returns true if f and g are equal.
func (f F) Equal(g F) bool {
func (f *F) Equal(g F) bool {
if len(f.Zones) != len(g.Zones) {
return false
}