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ipn/ipnlocal: flesh out the dnsConfigForNetmap tests
Follow-up to #2805 and #2806 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
Brad Fitzpatrick
parent
7fe6ecf165
commit
48933b0382
@ -41,6 +41,7 @@ func TestDNSConfigForNetmap(t *testing.T) {
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tests := []struct {
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name string
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nm *netmap.NetworkMap
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os string // version.OS value; empty means linux
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prefs *ipn.Prefs
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want *dns.Config
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wantLog string
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@ -108,13 +109,196 @@ func TestDNSConfigForNetmap(t *testing.T) {
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},
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},
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},
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// TODO(bradfitz): add tests with prefs.CorpDNS set
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// TODO(bradfitz): pass version.OS to func and add Android/etc tests
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{
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name: "corp_dns_misc",
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nm: &netmap.NetworkMap{
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Name: "host.some.domain.net.",
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DNS: tailcfg.DNSConfig{
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Proxied: true,
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Domains: []string{"foo.com", "bar.com"},
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},
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},
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prefs: &ipn.Prefs{
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CorpDNS: true,
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},
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want: &dns.Config{
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Hosts: map[dnsname.FQDN][]netaddr.IP{},
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Routes: map[dnsname.FQDN][]dnstype.Resolver{
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"0.e.1.a.c.5.1.1.a.7.d.f.ip6.arpa.": nil,
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"100.100.in-addr.arpa.": nil,
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"101.100.in-addr.arpa.": nil,
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"102.100.in-addr.arpa.": nil,
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"103.100.in-addr.arpa.": nil,
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"104.100.in-addr.arpa.": nil,
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"105.100.in-addr.arpa.": nil,
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"106.100.in-addr.arpa.": nil,
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"107.100.in-addr.arpa.": nil,
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"108.100.in-addr.arpa.": nil,
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"109.100.in-addr.arpa.": nil,
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"110.100.in-addr.arpa.": nil,
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"111.100.in-addr.arpa.": nil,
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"112.100.in-addr.arpa.": nil,
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"113.100.in-addr.arpa.": nil,
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"114.100.in-addr.arpa.": nil,
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"115.100.in-addr.arpa.": nil,
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"116.100.in-addr.arpa.": nil,
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"117.100.in-addr.arpa.": nil,
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"118.100.in-addr.arpa.": nil,
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"119.100.in-addr.arpa.": nil,
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"120.100.in-addr.arpa.": nil,
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"121.100.in-addr.arpa.": nil,
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"122.100.in-addr.arpa.": nil,
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"123.100.in-addr.arpa.": nil,
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"124.100.in-addr.arpa.": nil,
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"125.100.in-addr.arpa.": nil,
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"126.100.in-addr.arpa.": nil,
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"127.100.in-addr.arpa.": nil,
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"64.100.in-addr.arpa.": nil,
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"65.100.in-addr.arpa.": nil,
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"66.100.in-addr.arpa.": nil,
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"67.100.in-addr.arpa.": nil,
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"68.100.in-addr.arpa.": nil,
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"69.100.in-addr.arpa.": nil,
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"70.100.in-addr.arpa.": nil,
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"71.100.in-addr.arpa.": nil,
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"72.100.in-addr.arpa.": nil,
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"73.100.in-addr.arpa.": nil,
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"74.100.in-addr.arpa.": nil,
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"75.100.in-addr.arpa.": nil,
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"76.100.in-addr.arpa.": nil,
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"77.100.in-addr.arpa.": nil,
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"78.100.in-addr.arpa.": nil,
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"79.100.in-addr.arpa.": nil,
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"80.100.in-addr.arpa.": nil,
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"81.100.in-addr.arpa.": nil,
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"82.100.in-addr.arpa.": nil,
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"83.100.in-addr.arpa.": nil,
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"84.100.in-addr.arpa.": nil,
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"85.100.in-addr.arpa.": nil,
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"86.100.in-addr.arpa.": nil,
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"87.100.in-addr.arpa.": nil,
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"88.100.in-addr.arpa.": nil,
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"89.100.in-addr.arpa.": nil,
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"90.100.in-addr.arpa.": nil,
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"91.100.in-addr.arpa.": nil,
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"92.100.in-addr.arpa.": nil,
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"93.100.in-addr.arpa.": nil,
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"94.100.in-addr.arpa.": nil,
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"95.100.in-addr.arpa.": nil,
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"96.100.in-addr.arpa.": nil,
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"97.100.in-addr.arpa.": nil,
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"98.100.in-addr.arpa.": nil,
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"99.100.in-addr.arpa.": nil,
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"some.domain.net.": nil,
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},
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SearchDomains: []dnsname.FQDN{
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"foo.com.",
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"bar.com.",
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},
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},
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},
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{
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name: "android_does_need_fallbacks",
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os: "android",
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nm: &netmap.NetworkMap{
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DNS: tailcfg.DNSConfig{
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FallbackResolvers: []dnstype.Resolver{
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{Addr: "8.8.4.4"},
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},
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Routes: map[string][]dnstype.Resolver{
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"foo.com.": {{Addr: "1.2.3.4"}},
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},
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},
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},
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prefs: &ipn.Prefs{
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CorpDNS: true,
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},
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want: &dns.Config{
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Hosts: map[dnsname.FQDN][]netaddr.IP{},
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DefaultResolvers: []dnstype.Resolver{
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{Addr: "8.8.4.4:53"},
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},
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Routes: map[dnsname.FQDN][]dnstype.Resolver{
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"foo.com.": {{Addr: "1.2.3.4:53"}},
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},
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},
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},
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{
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name: "android_does_NOT_need_fallbacks",
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os: "android",
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nm: &netmap.NetworkMap{
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DNS: tailcfg.DNSConfig{
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Resolvers: []dnstype.Resolver{
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{Addr: "8.8.8.8"},
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},
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FallbackResolvers: []dnstype.Resolver{
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{Addr: "8.8.4.4"},
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},
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Routes: map[string][]dnstype.Resolver{
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"foo.com.": {{Addr: "1.2.3.4"}},
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},
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},
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},
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prefs: &ipn.Prefs{
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CorpDNS: true,
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},
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want: &dns.Config{
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Hosts: map[dnsname.FQDN][]netaddr.IP{},
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DefaultResolvers: []dnstype.Resolver{
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{Addr: "8.8.8.8:53"},
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},
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Routes: map[dnsname.FQDN][]dnstype.Resolver{
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"foo.com.": {{Addr: "1.2.3.4:53"}},
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},
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},
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},
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{
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name: "exit_nodes_need_fallbacks",
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nm: &netmap.NetworkMap{
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DNS: tailcfg.DNSConfig{
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FallbackResolvers: []dnstype.Resolver{
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{Addr: "8.8.4.4"},
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},
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},
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},
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prefs: &ipn.Prefs{
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CorpDNS: true,
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ExitNodeID: "some-id",
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},
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want: &dns.Config{
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Hosts: map[dnsname.FQDN][]netaddr.IP{},
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Routes: map[dnsname.FQDN][]dnstype.Resolver{},
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DefaultResolvers: []dnstype.Resolver{
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{Addr: "8.8.4.4:53"},
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},
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},
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},
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{
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name: "not_exit_node_NOT_need_fallbacks",
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nm: &netmap.NetworkMap{
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DNS: tailcfg.DNSConfig{
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FallbackResolvers: []dnstype.Resolver{
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{Addr: "8.8.4.4"},
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},
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},
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},
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prefs: &ipn.Prefs{
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CorpDNS: true,
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},
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want: &dns.Config{
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Hosts: map[dnsname.FQDN][]netaddr.IP{},
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Routes: map[dnsname.FQDN][]dnstype.Resolver{},
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},
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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verOS := tt.os
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if verOS == "" {
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verOS = "linux"
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}
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var log tstest.MemLogger
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got := dnsConfigForNetmap(tt.nm, tt.prefs, log.Logf)
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got := dnsConfigForNetmap(tt.nm, tt.prefs, log.Logf, verOS)
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if !reflect.DeepEqual(got, tt.want) {
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gotj, _ := json.MarshalIndent(got, "", "\t")
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wantj, _ := json.MarshalIndent(tt.want, "", "\t")
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@ -1768,7 +1768,7 @@ func (b *LocalBackend) authReconfig() {
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}
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rcfg := b.routerConfig(cfg, prefs)
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dcfg := dnsConfigForNetmap(nm, prefs, b.logf)
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dcfg := dnsConfigForNetmap(nm, prefs, b.logf, version.OS())
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err = b.e.Reconfig(cfg, rcfg, dcfg, nm.Debug)
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if err == wgengine.ErrNoChanges {
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@ -1779,7 +1779,12 @@ func (b *LocalBackend) authReconfig() {
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b.initPeerAPIListener()
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}
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func dnsConfigForNetmap(nm *netmap.NetworkMap, prefs *ipn.Prefs, logf logger.Logf) *dns.Config {
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// dnsConfigForNetmap returns a *dns.Config for the given netmap,
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// prefs, and client OS version.
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//
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// The versionOS is a Tailscale-style version ("iOS", "macOS") and not
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// a runtime.GOOS.
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func dnsConfigForNetmap(nm *netmap.NetworkMap, prefs *ipn.Prefs, logf logger.Logf, versionOS string) *dns.Config {
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dcfg := &dns.Config{
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Routes: map[dnsname.FQDN][]dnstype.Resolver{},
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Hosts: map[dnsname.FQDN][]netaddr.IP{},
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@ -1905,7 +1910,7 @@ func dnsConfigForNetmap(nm *netmap.NetworkMap, prefs *ipn.Prefs, logf logger.Log
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addDefault(nm.DNS.FallbackResolvers)
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case len(dcfg.Routes) == 0:
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// No settings requiring split DNS, no problem.
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case version.OS() == "android":
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case versionOS == "android":
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// We don't support split DNS at all on Android yet.
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addDefault(nm.DNS.FallbackResolvers)
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}
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