mirror of
https://github.com/tailscale/tailscale.git
synced 2024-11-29 21:15:39 +00:00
441 lines
11 KiB
Go
441 lines
11 KiB
Go
// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package dns
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import (
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"testing"
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"github.com/google/go-cmp/cmp"
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"github.com/google/go-cmp/cmp/cmpopts"
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"inet.af/netaddr"
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"tailscale.com/net/dns/resolver"
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"tailscale.com/util/dnsname"
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)
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type fakeOSConfigurator struct {
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SplitDNS bool
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BaseConfig OSConfig
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OSConfig OSConfig
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ResolverConfig resolver.Config
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}
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func (c *fakeOSConfigurator) SetDNS(cfg OSConfig) error {
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if !c.SplitDNS && len(cfg.MatchDomains) > 0 {
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panic("split DNS config passed to non-split OSConfigurator")
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}
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c.OSConfig = cfg
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return nil
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}
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func (c *fakeOSConfigurator) SetResolver(cfg resolver.Config) {
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c.ResolverConfig = cfg
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}
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func (c *fakeOSConfigurator) SupportsSplitDNS() bool {
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return c.SplitDNS
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}
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func (c *fakeOSConfigurator) GetBaseConfig() (OSConfig, error) {
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return c.BaseConfig, nil
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}
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func (c *fakeOSConfigurator) Close() error { return nil }
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func TestManager(t *testing.T) {
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// Note: these tests assume that it's safe to switch the
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// OSConfigurator's split-dns support on and off between Set
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// calls. Empirically this is currently true, because we reprobe
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// the support every time we generate configs. It would be
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// reasonable to make this unsupported as well, in which case
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// these tests will need tweaking.
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tests := []struct {
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name string
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in Config
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split bool
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bs OSConfig
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os OSConfig
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rs resolver.Config
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}{
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{
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name: "empty",
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},
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{
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name: "search-only",
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in: Config{
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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},
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os: OSConfig{
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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},
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},
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{
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name: "corp",
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in: Config{
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DefaultResolvers: mustIPPs("1.1.1.1:53", "9.9.9.9:53"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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},
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os: OSConfig{
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Nameservers: mustIPs("1.1.1.1", "9.9.9.9"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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},
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},
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{
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name: "corp-split",
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in: Config{
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DefaultResolvers: mustIPPs("1.1.1.1:53", "9.9.9.9:53"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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},
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split: true,
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os: OSConfig{
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Nameservers: mustIPs("1.1.1.1", "9.9.9.9"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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},
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},
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{
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name: "corp-magic",
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in: Config{
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DefaultResolvers: mustIPPs("1.1.1.1:53", "9.9.9.9:53"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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Hosts: hosts(
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"dave.ts.com.", "1.2.3.4",
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"bradfitz.ts.com.", "2.3.4.5"),
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AuthoritativeSuffixes: fqdns("ts.com"),
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},
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os: OSConfig{
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Nameservers: mustIPs("100.100.100.100"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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},
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rs: resolver.Config{
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Routes: upstreams(".", "1.1.1.1:53", "9.9.9.9:53"),
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Hosts: hosts(
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"dave.ts.com.", "1.2.3.4",
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"bradfitz.ts.com.", "2.3.4.5"),
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LocalDomains: fqdns("ts.com."),
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},
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},
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{
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name: "corp-magic-split",
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in: Config{
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DefaultResolvers: mustIPPs("1.1.1.1:53", "9.9.9.9:53"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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Hosts: hosts(
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"dave.ts.com.", "1.2.3.4",
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"bradfitz.ts.com.", "2.3.4.5"),
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AuthoritativeSuffixes: fqdns("ts.com"),
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},
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split: true,
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os: OSConfig{
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Nameservers: mustIPs("100.100.100.100"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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},
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rs: resolver.Config{
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Routes: upstreams(".", "1.1.1.1:53", "9.9.9.9:53"),
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Hosts: hosts(
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"dave.ts.com.", "1.2.3.4",
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"bradfitz.ts.com.", "2.3.4.5"),
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LocalDomains: fqdns("ts.com."),
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},
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},
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{
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name: "corp-routes",
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in: Config{
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DefaultResolvers: mustIPPs("1.1.1.1:53", "9.9.9.9:53"),
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Routes: upstreams("corp.com", "2.2.2.2:53"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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},
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os: OSConfig{
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Nameservers: mustIPs("100.100.100.100"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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},
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rs: resolver.Config{
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Routes: upstreams(
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".", "1.1.1.1:53", "9.9.9.9:53",
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"corp.com.", "2.2.2.2:53"),
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},
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},
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{
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name: "corp-routes-split",
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in: Config{
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DefaultResolvers: mustIPPs("1.1.1.1:53", "9.9.9.9:53"),
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Routes: upstreams("corp.com", "2.2.2.2:53"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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},
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split: true,
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os: OSConfig{
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Nameservers: mustIPs("100.100.100.100"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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},
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rs: resolver.Config{
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Routes: upstreams(
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".", "1.1.1.1:53", "9.9.9.9:53",
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"corp.com.", "2.2.2.2:53"),
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},
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},
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{
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name: "routes",
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in: Config{
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Routes: upstreams("corp.com", "2.2.2.2:53"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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},
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bs: OSConfig{
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Nameservers: mustIPs("8.8.8.8"),
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SearchDomains: fqdns("coffee.shop"),
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},
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os: OSConfig{
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Nameservers: mustIPs("100.100.100.100"),
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SearchDomains: fqdns("tailscale.com", "universe.tf", "coffee.shop"),
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},
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rs: resolver.Config{
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Routes: upstreams(
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".", "8.8.8.8:53",
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"corp.com.", "2.2.2.2:53"),
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},
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},
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{
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name: "routes-split",
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in: Config{
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Routes: upstreams("corp.com", "2.2.2.2:53"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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},
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split: true,
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os: OSConfig{
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Nameservers: mustIPs("2.2.2.2"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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MatchDomains: fqdns("corp.com"),
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},
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},
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{
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name: "routes-multi",
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in: Config{
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Routes: upstreams(
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"corp.com", "2.2.2.2:53",
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"bigco.net", "3.3.3.3:53"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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},
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bs: OSConfig{
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Nameservers: mustIPs("8.8.8.8"),
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SearchDomains: fqdns("coffee.shop"),
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},
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os: OSConfig{
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Nameservers: mustIPs("100.100.100.100"),
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SearchDomains: fqdns("tailscale.com", "universe.tf", "coffee.shop"),
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},
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rs: resolver.Config{
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Routes: upstreams(
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".", "8.8.8.8:53",
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"corp.com.", "2.2.2.2:53",
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"bigco.net.", "3.3.3.3:53"),
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},
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},
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{
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name: "routes-multi-split",
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in: Config{
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Routes: upstreams(
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"corp.com", "2.2.2.2:53",
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"bigco.net", "3.3.3.3:53"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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},
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split: true,
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os: OSConfig{
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Nameservers: mustIPs("100.100.100.100"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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MatchDomains: fqdns("bigco.net", "corp.com"),
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},
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rs: resolver.Config{
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Routes: upstreams(
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"corp.com.", "2.2.2.2:53",
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"bigco.net.", "3.3.3.3:53"),
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},
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},
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{
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name: "magic",
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in: Config{
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Hosts: hosts(
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"dave.ts.com.", "1.2.3.4",
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"bradfitz.ts.com.", "2.3.4.5"),
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AuthoritativeSuffixes: fqdns("ts.com"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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},
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bs: OSConfig{
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Nameservers: mustIPs("8.8.8.8"),
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SearchDomains: fqdns("coffee.shop"),
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},
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os: OSConfig{
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Nameservers: mustIPs("100.100.100.100"),
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SearchDomains: fqdns("tailscale.com", "universe.tf", "coffee.shop"),
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},
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rs: resolver.Config{
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Routes: upstreams(".", "8.8.8.8:53"),
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Hosts: hosts(
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"dave.ts.com.", "1.2.3.4",
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"bradfitz.ts.com.", "2.3.4.5"),
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LocalDomains: fqdns("ts.com."),
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},
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},
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{
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name: "magic-split",
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in: Config{
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Hosts: hosts(
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"dave.ts.com.", "1.2.3.4",
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"bradfitz.ts.com.", "2.3.4.5"),
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AuthoritativeSuffixes: fqdns("ts.com"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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},
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split: true,
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os: OSConfig{
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Nameservers: mustIPs("100.100.100.100"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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MatchDomains: fqdns("ts.com"),
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},
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rs: resolver.Config{
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Hosts: hosts(
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"dave.ts.com.", "1.2.3.4",
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"bradfitz.ts.com.", "2.3.4.5"),
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LocalDomains: fqdns("ts.com."),
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},
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},
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{
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name: "routes-magic",
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in: Config{
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Routes: upstreams("corp.com", "2.2.2.2:53"),
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Hosts: hosts(
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"dave.ts.com.", "1.2.3.4",
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"bradfitz.ts.com.", "2.3.4.5"),
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AuthoritativeSuffixes: fqdns("ts.com"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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},
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bs: OSConfig{
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Nameservers: mustIPs("8.8.8.8"),
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SearchDomains: fqdns("coffee.shop"),
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},
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os: OSConfig{
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Nameservers: mustIPs("100.100.100.100"),
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SearchDomains: fqdns("tailscale.com", "universe.tf", "coffee.shop"),
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},
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rs: resolver.Config{
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Routes: upstreams(
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"corp.com.", "2.2.2.2:53",
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".", "8.8.8.8:53"),
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Hosts: hosts(
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"dave.ts.com.", "1.2.3.4",
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"bradfitz.ts.com.", "2.3.4.5"),
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LocalDomains: fqdns("ts.com."),
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},
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},
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{
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name: "routes-magic-split",
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in: Config{
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Routes: upstreams("corp.com", "2.2.2.2:53"),
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Hosts: hosts(
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"dave.ts.com.", "1.2.3.4",
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"bradfitz.ts.com.", "2.3.4.5"),
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AuthoritativeSuffixes: fqdns("ts.com"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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},
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split: true,
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os: OSConfig{
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Nameservers: mustIPs("100.100.100.100"),
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SearchDomains: fqdns("tailscale.com", "universe.tf"),
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MatchDomains: fqdns("corp.com", "ts.com"),
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},
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rs: resolver.Config{
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Routes: upstreams("corp.com.", "2.2.2.2:53"),
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Hosts: hosts(
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"dave.ts.com.", "1.2.3.4",
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"bradfitz.ts.com.", "2.3.4.5"),
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LocalDomains: fqdns("ts.com."),
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},
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},
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}
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for _, test := range tests {
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t.Run(test.name, func(t *testing.T) {
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f := fakeOSConfigurator{
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SplitDNS: test.split,
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BaseConfig: test.bs,
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}
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m := NewManager(t.Logf, &f, nil)
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m.resolver.TestOnlySetHook(f.SetResolver)
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if err := m.Set(test.in); err != nil {
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t.Fatalf("m.Set: %v", err)
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}
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tr := cmp.Transformer("ipStr", func(ip netaddr.IP) string { return ip.String() })
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if diff := cmp.Diff(f.OSConfig, test.os, tr, cmpopts.EquateEmpty()); diff != "" {
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t.Errorf("wrong OSConfig (-got+want)\n%s", diff)
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}
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if diff := cmp.Diff(f.ResolverConfig, test.rs, tr, cmpopts.EquateEmpty()); diff != "" {
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t.Errorf("wrong resolver.Config (-got+want)\n%s", diff)
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}
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})
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}
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}
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func mustIPs(strs ...string) (ret []netaddr.IP) {
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for _, s := range strs {
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ret = append(ret, netaddr.MustParseIP(s))
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}
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return ret
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}
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func mustIPPs(strs ...string) (ret []netaddr.IPPort) {
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for _, s := range strs {
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ret = append(ret, netaddr.MustParseIPPort(s))
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}
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return ret
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}
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func fqdns(strs ...string) (ret []dnsname.FQDN) {
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for _, s := range strs {
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fqdn, err := dnsname.ToFQDN(s)
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if err != nil {
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panic(err)
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}
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ret = append(ret, fqdn)
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}
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return ret
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}
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func hosts(strs ...string) (ret map[dnsname.FQDN][]netaddr.IP) {
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var key dnsname.FQDN
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ret = map[dnsname.FQDN][]netaddr.IP{}
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for _, s := range strs {
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if ip, err := netaddr.ParseIP(s); err == nil {
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if key == "" {
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panic("IP provided before name")
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}
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ret[key] = append(ret[key], ip)
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} else {
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fqdn, err := dnsname.ToFQDN(s)
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if err != nil {
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panic(err)
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}
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key = fqdn
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}
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}
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return ret
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}
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func upstreams(strs ...string) (ret map[dnsname.FQDN][]netaddr.IPPort) {
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var key dnsname.FQDN
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ret = map[dnsname.FQDN][]netaddr.IPPort{}
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for _, s := range strs {
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if ipp, err := netaddr.ParseIPPort(s); err == nil {
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if key == "" {
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panic("IPPort provided before suffix")
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}
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ret[key] = append(ret[key], ipp)
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} else {
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fqdn, err := dnsname.ToFQDN(s)
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if err != nil {
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panic(err)
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}
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key = fqdn
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}
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}
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return ret
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}
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