mirror of
https://github.com/Control-D-Inc/ctrld.git
synced 2026-02-03 22:18:39 +00:00
c7168739c7
Since application may need SRV record for public domains, which could be blocked by OS resolver, but not with remote upstreams. This was reported by a Minecraft user, who seeing thing is broken after upgrading to v1.4.0 release.
467 lines
15 KiB
Go
467 lines
15 KiB
Go
package cli
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import (
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"context"
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"net"
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"testing"
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"time"
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"github.com/miekg/dns"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"github.com/Control-D-Inc/ctrld"
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"github.com/Control-D-Inc/ctrld/internal/dnscache"
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"github.com/Control-D-Inc/ctrld/testhelper"
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)
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func Test_wildcardMatches(t *testing.T) {
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tests := []struct {
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name string
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wildcard string
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domain string
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match bool
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}{
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{"domain - prefix parent should not match", "*.windscribe.com", "windscribe.com", false},
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{"domain - prefix", "*.windscribe.com", "anything.windscribe.com", true},
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{"domain - prefix not match other s", "*.windscribe.com", "example.com", false},
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{"domain - prefix not match s in name", "*.windscribe.com", "wwindscribe.com", false},
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{"domain - suffix", "suffix.*", "suffix.windscribe.com", true},
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{"domain - suffix not match other", "suffix.*", "suffix1.windscribe.com", false},
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{"domain - both", "suffix.*.windscribe.com", "suffix.anything.windscribe.com", true},
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{"domain - both not match", "suffix.*.windscribe.com", "suffix1.suffix.windscribe.com", false},
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{"domain - case-insensitive", "*.WINDSCRIBE.com", "anything.windscribe.com", true},
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{"mac - prefix", "*:98:05:b4:2b", "d4:67:98:05:b4:2b", true},
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{"mac - prefix not match other s", "*:98:05:b4:2b", "0d:ba:54:09:94:2c", false},
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{"mac - prefix not match s in name", "*:98:05:b4:2b", "e4:67:97:05:b4:2b", false},
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{"mac - suffix", "d4:67:98:*", "d4:67:98:05:b4:2b", true},
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{"mac - suffix not match other", "d4:67:98:*", "d4:67:97:15:b4:2b", false},
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{"mac - both", "d4:67:98:*:b4:2b", "d4:67:98:05:b4:2b", true},
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{"mac - both not match", "d4:67:98:*:b4:2b", "d4:67:97:05:c4:2b", false},
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}
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for _, tc := range tests {
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tc := tc
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t.Run(tc.name, func(t *testing.T) {
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t.Parallel()
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if got := wildcardMatches(tc.wildcard, tc.domain); got != tc.match {
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t.Errorf("unexpected result, wildcard: %s, domain: %s, want: %v, got: %v", tc.wildcard, tc.domain, tc.match, got)
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}
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})
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}
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}
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func Test_canonicalName(t *testing.T) {
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tests := []struct {
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name string
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domain string
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canonical string
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}{
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{"fqdn to canonical", "windscribe.com.", "windscribe.com"},
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{"already canonical", "windscribe.com", "windscribe.com"},
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{"case insensitive", "Windscribe.Com.", "windscribe.com"},
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}
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for _, tc := range tests {
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tc := tc
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t.Run(tc.name, func(t *testing.T) {
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t.Parallel()
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if got := canonicalName(tc.domain); got != tc.canonical {
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t.Errorf("unexpected result, want: %s, got: %s", tc.canonical, got)
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}
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})
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}
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}
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func Test_prog_upstreamFor(t *testing.T) {
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cfg := testhelper.SampleConfig(t)
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cfg.Service.LeakOnUpstreamFailure = func(v bool) *bool { return &v }(false)
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p := &prog{cfg: cfg}
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p.um = newUpstreamMonitor(p.cfg)
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p.lanLoopGuard = newLoopGuard()
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p.ptrLoopGuard = newLoopGuard()
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for _, nc := range p.cfg.Network {
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for _, cidr := range nc.Cidrs {
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_, ipNet, err := net.ParseCIDR(cidr)
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if err != nil {
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t.Fatal(err)
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}
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nc.IPNets = append(nc.IPNets, ipNet)
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}
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}
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tests := []struct {
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name string
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ip string
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mac string
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defaultUpstreamNum string
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lc *ctrld.ListenerConfig
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domain string
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upstreams []string
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matched bool
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testLogMsg string
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}{
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{"Policy map matches", "192.168.0.1:0", "", "0", p.cfg.Listener["0"], "abc.xyz", []string{"upstream.1", "upstream.0"}, true, ""},
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{"Policy split matches", "192.168.0.1:0", "", "0", p.cfg.Listener["0"], "abc.ru", []string{"upstream.1"}, true, ""},
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{"Policy map for other network matches", "192.168.1.2:0", "", "0", p.cfg.Listener["0"], "abc.xyz", []string{"upstream.0"}, true, ""},
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{"No policy map for listener", "192.168.1.2:0", "", "1", p.cfg.Listener["1"], "abc.ru", []string{"upstream.1"}, false, ""},
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{"unenforced loging", "192.168.1.2:0", "", "0", p.cfg.Listener["0"], "abc.ru", []string{"upstream.1"}, true, "My Policy, network.1 (unenforced), *.ru -> [upstream.1]"},
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{"Policy Macs matches upper", "192.168.0.1:0", "14:45:A0:67:83:0A", "0", p.cfg.Listener["0"], "abc.xyz", []string{"upstream.2"}, true, "14:45:a0:67:83:0a"},
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{"Policy Macs matches lower", "192.168.0.1:0", "14:54:4a:8e:08:2d", "0", p.cfg.Listener["0"], "abc.xyz", []string{"upstream.2"}, true, "14:54:4a:8e:08:2d"},
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{"Policy Macs matches case-insensitive", "192.168.0.1:0", "14:54:4A:8E:08:2D", "0", p.cfg.Listener["0"], "abc.xyz", []string{"upstream.2"}, true, "14:54:4a:8e:08:2d"},
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}
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for _, tc := range tests {
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t.Run(tc.name, func(t *testing.T) {
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for _, network := range []string{"udp", "tcp"} {
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var (
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addr net.Addr
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err error
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)
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switch network {
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case "udp":
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addr, err = net.ResolveUDPAddr(network, tc.ip)
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case "tcp":
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addr, err = net.ResolveTCPAddr(network, tc.ip)
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}
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require.NoError(t, err)
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require.NotNil(t, addr)
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ctx := context.WithValue(context.Background(), ctrld.ReqIdCtxKey{}, requestID())
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ufr := p.upstreamFor(ctx, tc.defaultUpstreamNum, tc.lc, addr, tc.mac, tc.domain)
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p.proxy(ctx, &proxyRequest{
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msg: newDnsMsgWithHostname("foo", dns.TypeA),
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ufr: ufr,
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})
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assert.Equal(t, tc.matched, ufr.matched)
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assert.Equal(t, tc.upstreams, ufr.upstreams)
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if tc.testLogMsg != "" {
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assert.Contains(t, logOutput.String(), tc.testLogMsg)
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}
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}
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})
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}
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}
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func TestCache(t *testing.T) {
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cfg := testhelper.SampleConfig(t)
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prog := &prog{cfg: cfg}
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for _, nc := range prog.cfg.Network {
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for _, cidr := range nc.Cidrs {
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_, ipNet, err := net.ParseCIDR(cidr)
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if err != nil {
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t.Fatal(err)
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}
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nc.IPNets = append(nc.IPNets, ipNet)
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}
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}
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cacher, err := dnscache.NewLRUCache(4096)
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require.NoError(t, err)
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prog.cache = cacher
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msg := new(dns.Msg)
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msg.SetQuestion("example.com", dns.TypeA)
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msg.MsgHdr.RecursionDesired = true
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answer1 := new(dns.Msg)
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answer1.SetRcode(msg, dns.RcodeSuccess)
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prog.cache.Add(dnscache.NewKey(msg, "upstream.1"), dnscache.NewValue(answer1, time.Now().Add(time.Minute)))
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answer2 := new(dns.Msg)
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answer2.SetRcode(msg, dns.RcodeRefused)
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prog.cache.Add(dnscache.NewKey(msg, "upstream.0"), dnscache.NewValue(answer2, time.Now().Add(time.Minute)))
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req1 := &proxyRequest{
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msg: msg,
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ci: nil,
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failoverRcodes: nil,
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ufr: &upstreamForResult{
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upstreams: []string{"upstream.1"},
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matchedPolicy: "",
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matchedNetwork: "",
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matchedRule: "",
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matched: false,
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},
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}
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req2 := &proxyRequest{
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msg: msg,
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ci: nil,
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failoverRcodes: nil,
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ufr: &upstreamForResult{
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upstreams: []string{"upstream.0"},
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matchedPolicy: "",
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matchedNetwork: "",
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matchedRule: "",
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matched: false,
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},
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}
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got1 := prog.proxy(context.Background(), req1)
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got2 := prog.proxy(context.Background(), req2)
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assert.NotSame(t, got1, got2)
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assert.Equal(t, answer1.Rcode, got1.answer.Rcode)
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assert.Equal(t, answer2.Rcode, got2.answer.Rcode)
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}
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func Test_ipAndMacFromMsg(t *testing.T) {
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tests := []struct {
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name string
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ip string
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wantIp bool
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mac string
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wantMac bool
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}{
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{"has ip v4 and mac", "1.2.3.4", true, "4c:20:b8:ab:87:1b", true},
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{"has ip v6 and mac", "2606:1a40:3::1", true, "4c:20:b8:ab:87:1b", true},
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{"no ip", "1.2.3.4", false, "4c:20:b8:ab:87:1b", false},
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{"no mac", "1.2.3.4", false, "4c:20:b8:ab:87:1b", false},
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}
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for _, tc := range tests {
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tc := tc
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t.Run(tc.name, func(t *testing.T) {
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t.Parallel()
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ip := net.ParseIP(tc.ip)
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if ip == nil {
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t.Fatal("missing IP")
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}
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hw, err := net.ParseMAC(tc.mac)
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if err != nil {
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t.Fatal(err)
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}
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m := new(dns.Msg)
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m.SetQuestion("example.com.", dns.TypeA)
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o := &dns.OPT{Hdr: dns.RR_Header{Name: ".", Rrtype: dns.TypeOPT}}
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if tc.wantMac {
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ec1 := &dns.EDNS0_LOCAL{Code: EDNS0_OPTION_MAC, Data: hw}
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o.Option = append(o.Option, ec1)
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}
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if tc.wantIp {
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ec2 := &dns.EDNS0_SUBNET{Address: ip}
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o.Option = append(o.Option, ec2)
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}
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m.Extra = append(m.Extra, o)
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gotIP, gotMac := ipAndMacFromMsg(m)
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if tc.wantMac && gotMac != tc.mac {
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t.Errorf("mismatch, want: %q, got: %q", tc.mac, gotMac)
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}
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if !tc.wantMac && gotMac != "" {
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t.Errorf("unexpected mac: %q", gotMac)
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}
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if tc.wantIp && gotIP != tc.ip {
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t.Errorf("mismatch, want: %q, got: %q", tc.ip, gotIP)
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}
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if !tc.wantIp && gotIP != "" {
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t.Errorf("unexpected ip: %q", gotIP)
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}
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})
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}
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}
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func Test_remoteAddrFromMsg(t *testing.T) {
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loopbackIP := net.ParseIP("127.0.0.1")
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tests := []struct {
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name string
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addr net.Addr
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ci *ctrld.ClientInfo
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want string
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}{
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{"tcp", &net.TCPAddr{IP: loopbackIP, Port: 12345}, &ctrld.ClientInfo{IP: "192.168.1.10"}, "192.168.1.10:12345"},
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{"udp", &net.UDPAddr{IP: loopbackIP, Port: 12345}, &ctrld.ClientInfo{IP: "192.168.1.11"}, "192.168.1.11:12345"},
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{"nil client info", &net.UDPAddr{IP: loopbackIP, Port: 12345}, nil, "127.0.0.1:12345"},
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{"empty ip", &net.UDPAddr{IP: loopbackIP, Port: 12345}, &ctrld.ClientInfo{}, "127.0.0.1:12345"},
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}
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for _, tc := range tests {
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tc := tc
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t.Run(tc.name, func(t *testing.T) {
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t.Parallel()
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addr := spoofRemoteAddr(tc.addr, tc.ci)
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if addr.String() != tc.want {
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t.Errorf("unexpected result, want: %q, got: %q", tc.want, addr.String())
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}
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})
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}
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}
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func Test_ipFromARPA(t *testing.T) {
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tests := []struct {
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IP string
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ARPA string
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}{
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{"1.2.3.4", "4.3.2.1.in-addr.arpa."},
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{"245.110.36.114", "114.36.110.245.in-addr.arpa."},
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{"::ffff:12.34.56.78", "78.56.34.12.in-addr.arpa."},
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{"::1", "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa."},
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{"1::", "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.0.0.0.ip6.arpa."},
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{"1234:567::89a:bcde", "e.d.c.b.a.9.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.7.6.5.0.4.3.2.1.ip6.arpa."},
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{"1234:567:fefe:bcbc:adad:9e4a:89a:bcde", "e.d.c.b.a.9.8.0.a.4.e.9.d.a.d.a.c.b.c.b.e.f.e.f.7.6.5.0.4.3.2.1.ip6.arpa."},
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{"", "asd.in-addr.arpa."},
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{"", "asd.ip6.arpa."},
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}
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for _, tc := range tests {
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tc := tc
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t.Run(tc.IP, func(t *testing.T) {
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t.Parallel()
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if got := ipFromARPA(tc.ARPA); !got.Equal(net.ParseIP(tc.IP)) {
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t.Errorf("unexpected ip, want: %s, got: %s", tc.IP, got)
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}
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})
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}
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}
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func newDnsMsgWithClientIP(ip string) *dns.Msg {
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m := new(dns.Msg)
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m.SetQuestion("example.com.", dns.TypeA)
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o := &dns.OPT{Hdr: dns.RR_Header{Name: ".", Rrtype: dns.TypeOPT}}
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o.Option = append(o.Option, &dns.EDNS0_SUBNET{Address: net.ParseIP(ip)})
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m.Extra = append(m.Extra, o)
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return m
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}
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func Test_stripClientSubnet(t *testing.T) {
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tests := []struct {
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name string
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msg *dns.Msg
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wantSubnet bool
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}{
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{"no edns0", new(dns.Msg), false},
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{"loopback IP v4", newDnsMsgWithClientIP("127.0.0.1"), false},
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{"loopback IP v6", newDnsMsgWithClientIP("::1"), false},
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{"private IP v4", newDnsMsgWithClientIP("192.168.1.123"), false},
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{"private IP v6", newDnsMsgWithClientIP("fd12:3456:789a:1::1"), false},
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{"public IP", newDnsMsgWithClientIP("1.1.1.1"), true},
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{"invalid IP", newDnsMsgWithClientIP(""), true},
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}
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for _, tc := range tests {
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tc := tc
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t.Run(tc.name, func(t *testing.T) {
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t.Parallel()
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stripClientSubnet(tc.msg)
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hasSubnet := false
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if opt := tc.msg.IsEdns0(); opt != nil {
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for _, s := range opt.Option {
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if _, ok := s.(*dns.EDNS0_SUBNET); ok {
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hasSubnet = true
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}
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}
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}
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if tc.wantSubnet != hasSubnet {
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t.Errorf("unexpected result, want: %v, got: %v", tc.wantSubnet, hasSubnet)
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}
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})
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}
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}
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func newDnsMsgWithHostname(hostname string, typ uint16) *dns.Msg {
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m := new(dns.Msg)
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m.SetQuestion(hostname, typ)
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return m
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}
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func Test_isLanHostnameQuery(t *testing.T) {
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tests := []struct {
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name string
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msg *dns.Msg
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isLanHostnameQuery bool
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}{
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{"A", newDnsMsgWithHostname("foo", dns.TypeA), true},
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{"AAAA", newDnsMsgWithHostname("foo", dns.TypeAAAA), true},
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{"A not LAN", newDnsMsgWithHostname("example.com", dns.TypeA), false},
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{"AAAA not LAN", newDnsMsgWithHostname("example.com", dns.TypeAAAA), false},
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{"Not A or AAAA", newDnsMsgWithHostname("foo", dns.TypeTXT), false},
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{".domain", newDnsMsgWithHostname("foo.domain", dns.TypeA), true},
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{".lan", newDnsMsgWithHostname("foo.lan", dns.TypeA), true},
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{".local", newDnsMsgWithHostname("foo.local", dns.TypeA), true},
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}
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for _, tc := range tests {
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tc := tc
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t.Run(tc.name, func(t *testing.T) {
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t.Parallel()
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if got := isLanHostnameQuery(tc.msg); tc.isLanHostnameQuery != got {
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t.Errorf("unexpected result, want: %v, got: %v", tc.isLanHostnameQuery, got)
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}
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})
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}
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}
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func newDnsMsgPtr(ip string, t *testing.T) *dns.Msg {
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t.Helper()
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m := new(dns.Msg)
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ptr, err := dns.ReverseAddr(ip)
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if err != nil {
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t.Fatal(err)
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}
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m.SetQuestion(ptr, dns.TypePTR)
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return m
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}
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func Test_isPrivatePtrLookup(t *testing.T) {
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tests := []struct {
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name string
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msg *dns.Msg
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isPrivatePtrLookup bool
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}{
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// RFC 1918 allocates 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 as
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{"10.0.0.0/8", newDnsMsgPtr("10.0.0.123", t), true},
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{"172.16.0.0/12", newDnsMsgPtr("172.16.0.123", t), true},
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{"192.168.0.0/16", newDnsMsgPtr("192.168.1.123", t), true},
|
|
{"CGNAT", newDnsMsgPtr("100.66.27.28", t), true},
|
|
{"Loopback", newDnsMsgPtr("127.0.0.1", t), true},
|
|
{"Link Local Unicast", newDnsMsgPtr("fe80::69f6:e16e:8bdb:433f", t), true},
|
|
{"Public IP", newDnsMsgPtr("8.8.8.8", t), false},
|
|
}
|
|
for _, tc := range tests {
|
|
tc := tc
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
t.Parallel()
|
|
if got := isPrivatePtrLookup(tc.msg); tc.isPrivatePtrLookup != got {
|
|
t.Errorf("unexpected result, want: %v, got: %v", tc.isPrivatePtrLookup, got)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func Test_isSrvLanLookup(t *testing.T) {
|
|
tests := []struct {
|
|
name string
|
|
msg *dns.Msg
|
|
isSrvLookup bool
|
|
}{
|
|
{"SRV LAN", newDnsMsgWithHostname("foo", dns.TypeSRV), true},
|
|
{"Not SRV", newDnsMsgWithHostname("foo", dns.TypeNone), false},
|
|
{"Not SRV LAN", newDnsMsgWithHostname("controld.com", dns.TypeSRV), false},
|
|
}
|
|
for _, tc := range tests {
|
|
tc := tc
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
t.Parallel()
|
|
if got := isSrvLanLookup(tc.msg); tc.isSrvLookup != got {
|
|
t.Errorf("unexpected result, want: %v, got: %v", tc.isSrvLookup, got)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func Test_isWanClient(t *testing.T) {
|
|
tests := []struct {
|
|
name string
|
|
addr net.Addr
|
|
isWanClient bool
|
|
}{
|
|
// RFC 1918 allocates 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 as
|
|
{"10.0.0.0/8", &net.UDPAddr{IP: net.ParseIP("10.0.0.123")}, false},
|
|
{"172.16.0.0/12", &net.UDPAddr{IP: net.ParseIP("172.16.0.123")}, false},
|
|
{"192.168.0.0/16", &net.UDPAddr{IP: net.ParseIP("192.168.1.123")}, false},
|
|
{"CGNAT", &net.UDPAddr{IP: net.ParseIP("100.66.27.28")}, false},
|
|
{"Loopback", &net.UDPAddr{IP: net.ParseIP("127.0.0.1")}, false},
|
|
{"Link Local Unicast", &net.UDPAddr{IP: net.ParseIP("fe80::69f6:e16e:8bdb:433f")}, false},
|
|
{"Public", &net.UDPAddr{IP: net.ParseIP("8.8.8.8")}, true},
|
|
}
|
|
for _, tc := range tests {
|
|
tc := tc
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
t.Parallel()
|
|
if got := isWanClient(tc.addr); tc.isWanClient != got {
|
|
t.Errorf("unexpected result, want: %v, got: %v", tc.isWanClient, got)
|
|
}
|
|
})
|
|
}
|
|
}
|