Files
headscale/hscontrol/util/dns_test.go
Kristoffer Dalby 4cca63155d all: apply godoc [Name] link conventions across comments
Every Go-identifier reference in // and /* */ comments now uses
godoc's [Name] linking syntax so pkg.go.dev and `go doc` render
them as clickable cross-references. No behaviour change.

Pattern applied across the tree:
  In-package         [Foo], [Foo.Bar]
  Cross-package      [pkg.Foo], [pkg.Foo.Bar]
  Stdlib             [netip.Prefix], [errors.Is], [context.Context]
  Tailscale          [tailcfg.MapResponse], [tailcfg.Node.CapMap],
                     [tailcfg.NodeAttrSuggestExitNode]

Skip rules:
  - File:line refs left as plain text
  - HuJSON wire keys inside backtick raw strings untouched
  - ACL/policy syntax tokens (tag:foo, autogroup:self, ...) not Go
    symbols, left as plain text
  - JSON/OIDC wire keys, gorm tags, RFC IPv6 placeholders, markdown
    link tags, decorative dividers — all left as-is
2026-05-19 09:55:22 +02:00

54 lines
1.7 KiB
Go

package util
import (
"net/netip"
"testing"
"github.com/stretchr/testify/assert"
"tailscale.com/util/dnsname"
"tailscale.com/util/must"
)
func TestMagicDNSRootDomains100(t *testing.T) {
domains := GenerateIPv4DNSRootDomain(netip.MustParsePrefix("100.64.0.0/10"))
assert.Contains(t, domains, must.Get(dnsname.ToFQDN("64.100.in-addr.arpa.")))
assert.Contains(t, domains, must.Get(dnsname.ToFQDN("100.100.in-addr.arpa.")))
assert.Contains(t, domains, must.Get(dnsname.ToFQDN("127.100.in-addr.arpa.")))
}
func TestMagicDNSRootDomains172(t *testing.T) {
domains := GenerateIPv4DNSRootDomain(netip.MustParsePrefix("172.16.0.0/16"))
assert.Contains(t, domains, must.Get(dnsname.ToFQDN("0.16.172.in-addr.arpa.")))
assert.Contains(t, domains, must.Get(dnsname.ToFQDN("255.16.172.in-addr.arpa.")))
}
// Happens when netmask is a multiple of 4 bits (sounds likely).
func TestMagicDNSRootDomainsIPv6Single(t *testing.T) {
domains := GenerateIPv6DNSRootDomain(netip.MustParsePrefix("fd7a:115c:a1e0::/48"))
assert.Len(t, domains, 1)
assert.Equal(t, "0.e.1.a.c.5.1.1.a.7.d.f.ip6.arpa.", domains[0].WithTrailingDot())
}
func TestMagicDNSRootDomainsIPv6SingleMultiple(t *testing.T) {
domains := GenerateIPv6DNSRootDomain(netip.MustParsePrefix("fd7a:115c:a1e0::/50"))
yieldsRoot := func(dom string) bool {
for _, candidate := range domains {
if candidate.WithTrailingDot() == dom {
return true
}
}
return false
}
assert.Len(t, domains, 4)
assert.True(t, yieldsRoot("0.0.e.1.a.c.5.1.1.a.7.d.f.ip6.arpa."))
assert.True(t, yieldsRoot("1.0.e.1.a.c.5.1.1.a.7.d.f.ip6.arpa."))
assert.True(t, yieldsRoot("2.0.e.1.a.c.5.1.1.a.7.d.f.ip6.arpa."))
assert.True(t, yieldsRoot("3.0.e.1.a.c.5.1.1.a.7.d.f.ip6.arpa."))
}