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dns: IPv6 roots generation

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This commit is contained in:
Csaba Sarkadi 2022-01-15 16:18:49 +01:00
parent 1a6e5d8770
commit 115d0cbe85
2 changed files with 105 additions and 10 deletions
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46
dns_test.go
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@ -10,8 +10,10 @@ import (
)
func (s *Suite) TestMagicDNSRootDomains100(c *check.C) {
prefix := netaddr.MustParseIPPrefix("100.64.0.0/10")
domains := generateMagicDNSRootDomains(prefix)
prefixes := []netaddr.IPPrefix{
netaddr.MustParseIPPrefix("100.64.0.0/10"),
}
domains := generateMagicDNSRootDomains(prefixes)
found := false
for _, domain := range domains {
@ -45,8 +47,10 @@ func (s *Suite) TestMagicDNSRootDomains100(c *check.C) {
}
func (s *Suite) TestMagicDNSRootDomains172(c *check.C) {
prefix := netaddr.MustParseIPPrefix("172.16.0.0/16")
domains := generateMagicDNSRootDomains(prefix)
prefixes := []netaddr.IPPrefix{
netaddr.MustParseIPPrefix("172.16.0.0/16"),
}
domains := generateMagicDNSRootDomains(prefixes)
found := false
for _, domain := range domains {
@ -69,6 +73,40 @@ func (s *Suite) TestMagicDNSRootDomains172(c *check.C) {
c.Assert(found, check.Equals, true)
}
// Happens when netmask is a multiple of 4 bits (sounds likely).
func (s *Suite) TestMagicDNSRootDomainsIPv6Single(c *check.C) {
prefixes := []netaddr.IPPrefix{
netaddr.MustParseIPPrefix("fd7a:115c:a1e0::/48"),
}
domains := generateMagicDNSRootDomains(prefixes)
c.Assert(len(domains), check.Equals, 1)
c.Assert(domains[0].WithTrailingDot(), check.Equals, "0.e.1.a.c.5.1.1.a.7.d.f.ip6.arpa.")
}
func (s *Suite) TestMagicDNSRootDomainsIPv6SingleMultiple(c *check.C) {
prefixes := []netaddr.IPPrefix{
netaddr.MustParseIPPrefix("fd7a:115c:a1e0::/50"),
}
domains := generateMagicDNSRootDomains(prefixes)
yieldsRoot := func(dom string) bool {
for _, candidate := range domains {
if candidate.WithTrailingDot() == dom {
return true
}
}
return false
}
c.Assert(len(domains), check.Equals, 4)
c.Assert(yieldsRoot("0.0.e.1.a.c.5.1.1.a.7.d.f.ip6.arpa."), check.Equals, true)
c.Assert(yieldsRoot("1.0.e.1.a.c.5.1.1.a.7.d.f.ip6.arpa."), check.Equals, true)
c.Assert(yieldsRoot("2.0.e.1.a.c.5.1.1.a.7.d.f.ip6.arpa."), check.Equals, true)
c.Assert(yieldsRoot("3.0.e.1.a.c.5.1.1.a.7.d.f.ip6.arpa."), check.Equals, true)
}
func (s *Suite) TestDNSConfigMapResponseWithMagicDNS(c *check.C) {
namespaceShared1, err := app.CreateNamespace("shared1")
c.Assert(err, check.IsNil)