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https://github.com/tailscale/tailscale.git
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e0f222b686
Add subscribers for AppConnector events Make the RouteAdvertiser interface optional We cannot yet remove it because the tests still depend on it to verify correctness. We will need to separately update the test fixtures to remove that dependency. Publish RouteInfo via the event bus, so we do not need a callback to do that. Replace it with a flag that indicates whether to treat the route info the connector has as "definitive" for filtering purposes. Update the tests to simplify the construction of AppConnector values now that a store callback is no longer required. Also fix a couple of pre-existing racy tests that were hidden by not being concurrent in the same way production is. Updates #15160 Updates #17192 Change-Id: Id39525c0f02184e88feaf0d8a3c05504850e47ee Signed-off-by: M. J. Fromberger <fromberger@tailscale.com>
873 lines
28 KiB
Go
873 lines
28 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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package appc
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import (
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stdcmp "cmp"
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"fmt"
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"net/netip"
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"reflect"
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"slices"
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"sync/atomic"
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"testing"
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"time"
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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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"golang.org/x/net/dns/dnsmessage"
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"tailscale.com/appc/appctest"
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"tailscale.com/tstest"
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"tailscale.com/types/appctype"
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"tailscale.com/util/clientmetric"
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"tailscale.com/util/eventbus/eventbustest"
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"tailscale.com/util/mak"
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"tailscale.com/util/must"
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"tailscale.com/util/slicesx"
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)
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func TestUpdateDomains(t *testing.T) {
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ctx := t.Context()
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bus := eventbustest.NewBus(t)
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for _, shouldStore := range []bool{false, true} {
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a := NewAppConnector(Config{
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Logf: t.Logf,
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EventBus: bus,
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HasStoredRoutes: shouldStore,
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})
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t.Cleanup(a.Close)
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a.UpdateDomains([]string{"example.com"})
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a.Wait(ctx)
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if got, want := a.Domains().AsSlice(), []string{"example.com"}; !slices.Equal(got, want) {
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t.Errorf("got %v; want %v", got, want)
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}
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addr := netip.MustParseAddr("192.0.0.8")
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a.domains["example.com"] = append(a.domains["example.com"], addr)
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a.UpdateDomains([]string{"example.com"})
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a.Wait(ctx)
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if got, want := a.domains["example.com"], []netip.Addr{addr}; !slices.Equal(got, want) {
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t.Errorf("got %v; want %v", got, want)
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}
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// domains are explicitly downcased on set.
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a.UpdateDomains([]string{"UP.EXAMPLE.COM"})
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a.Wait(ctx)
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if got, want := slicesx.MapKeys(a.domains), []string{"up.example.com"}; !slices.Equal(got, want) {
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t.Errorf("got %v; want %v", got, want)
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}
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}
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}
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func TestUpdateRoutes(t *testing.T) {
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ctx := t.Context()
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bus := eventbustest.NewBus(t)
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for _, shouldStore := range []bool{false, true} {
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w := eventbustest.NewWatcher(t, bus)
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rc := &appctest.RouteCollector{}
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a := NewAppConnector(Config{
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Logf: t.Logf,
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EventBus: bus,
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RouteAdvertiser: rc,
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HasStoredRoutes: shouldStore,
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})
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t.Cleanup(a.Close)
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a.updateDomains([]string{"*.example.com"})
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// This route should be collapsed into the range
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if err := a.ObserveDNSResponse(dnsResponse("a.example.com.", "192.0.2.1")); err != nil {
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t.Errorf("ObserveDNSResponse: %v", err)
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}
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a.Wait(ctx)
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if !slices.Equal(rc.Routes(), []netip.Prefix{netip.MustParsePrefix("192.0.2.1/32")}) {
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t.Fatalf("got %v, want %v", rc.Routes(), []netip.Prefix{netip.MustParsePrefix("192.0.2.1/32")})
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}
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// This route should not be collapsed or removed
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if err := a.ObserveDNSResponse(dnsResponse("b.example.com.", "192.0.0.1")); err != nil {
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t.Errorf("ObserveDNSResponse: %v", err)
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}
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a.Wait(ctx)
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routes := []netip.Prefix{netip.MustParsePrefix("192.0.2.0/24"), netip.MustParsePrefix("192.0.0.1/32")}
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a.updateRoutes(routes)
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a.Wait(ctx)
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slices.SortFunc(rc.Routes(), prefixCompare)
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rc.SetRoutes(slices.Compact(rc.Routes()))
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slices.SortFunc(routes, prefixCompare)
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// Ensure that the non-matching /32 is preserved, even though it's in the domains table.
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if !slices.EqualFunc(routes, rc.Routes(), prefixEqual) {
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t.Errorf("added routes: got %v, want %v", rc.Routes(), routes)
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}
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// Ensure that the contained /32 is removed, replaced by the /24.
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wantRemoved := []netip.Prefix{netip.MustParsePrefix("192.0.2.1/32")}
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if !slices.EqualFunc(rc.RemovedRoutes(), wantRemoved, prefixEqual) {
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t.Fatalf("unexpected removed routes: %v", rc.RemovedRoutes())
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}
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if err := eventbustest.Expect(w,
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eqUpdate(appctype.RouteUpdate{Advertise: prefixes("192.0.2.1/32")}),
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eventbustest.Type[appctype.RouteInfo](),
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eqUpdate(appctype.RouteUpdate{Advertise: prefixes("192.0.0.1/32")}),
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eventbustest.Type[appctype.RouteInfo](),
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eqUpdate(appctype.RouteUpdate{
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Advertise: prefixes("192.0.0.1/32", "192.0.2.0/24"),
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Unadvertise: prefixes("192.0.2.1/32"),
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}),
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eventbustest.Type[appctype.RouteInfo](),
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); err != nil {
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t.Error(err)
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}
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}
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}
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func TestUpdateRoutesUnadvertisesContainedRoutes(t *testing.T) {
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ctx := t.Context()
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bus := eventbustest.NewBus(t)
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for _, shouldStore := range []bool{false, true} {
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w := eventbustest.NewWatcher(t, bus)
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rc := &appctest.RouteCollector{}
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a := NewAppConnector(Config{
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Logf: t.Logf,
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EventBus: bus,
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RouteAdvertiser: rc,
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HasStoredRoutes: shouldStore,
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})
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t.Cleanup(a.Close)
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mak.Set(&a.domains, "example.com", []netip.Addr{netip.MustParseAddr("192.0.2.1")})
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rc.SetRoutes([]netip.Prefix{netip.MustParsePrefix("192.0.2.1/32")})
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routes := []netip.Prefix{netip.MustParsePrefix("192.0.2.0/24")}
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a.updateRoutes(routes)
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a.Wait(ctx)
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if !slices.EqualFunc(routes, rc.Routes(), prefixEqual) {
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t.Fatalf("got %v, want %v", rc.Routes(), routes)
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}
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if err := eventbustest.ExpectExactly(w,
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eqUpdate(appctype.RouteUpdate{
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Advertise: prefixes("192.0.2.0/24"),
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Unadvertise: prefixes("192.0.2.1/32"),
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}),
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eventbustest.Type[appctype.RouteInfo](),
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); err != nil {
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t.Error(err)
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}
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}
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}
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func TestDomainRoutes(t *testing.T) {
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bus := eventbustest.NewBus(t)
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for _, shouldStore := range []bool{false, true} {
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w := eventbustest.NewWatcher(t, bus)
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rc := &appctest.RouteCollector{}
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a := NewAppConnector(Config{
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Logf: t.Logf,
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EventBus: bus,
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RouteAdvertiser: rc,
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HasStoredRoutes: shouldStore,
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})
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t.Cleanup(a.Close)
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a.updateDomains([]string{"example.com"})
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if err := a.ObserveDNSResponse(dnsResponse("example.com.", "192.0.0.8")); err != nil {
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t.Errorf("ObserveDNSResponse: %v", err)
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}
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a.Wait(t.Context())
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want := map[string][]netip.Addr{
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"example.com": {netip.MustParseAddr("192.0.0.8")},
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}
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if got := a.DomainRoutes(); !reflect.DeepEqual(got, want) {
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t.Fatalf("DomainRoutes: got %v, want %v", got, want)
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}
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if err := eventbustest.ExpectExactly(w,
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eqUpdate(appctype.RouteUpdate{Advertise: prefixes("192.0.0.8/32")}),
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eventbustest.Type[appctype.RouteInfo](),
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); err != nil {
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t.Error(err)
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}
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}
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}
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func TestObserveDNSResponse(t *testing.T) {
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ctx := t.Context()
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bus := eventbustest.NewBus(t)
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for _, shouldStore := range []bool{false, true} {
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w := eventbustest.NewWatcher(t, bus)
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rc := &appctest.RouteCollector{}
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a := NewAppConnector(Config{
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Logf: t.Logf,
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EventBus: bus,
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RouteAdvertiser: rc,
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HasStoredRoutes: shouldStore,
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})
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t.Cleanup(a.Close)
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// a has no domains configured, so it should not advertise any routes
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if err := a.ObserveDNSResponse(dnsResponse("example.com.", "192.0.0.8")); err != nil {
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t.Errorf("ObserveDNSResponse: %v", err)
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}
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if got, want := rc.Routes(), ([]netip.Prefix)(nil); !slices.Equal(got, want) {
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t.Errorf("got %v; want %v", got, want)
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}
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wantRoutes := []netip.Prefix{netip.MustParsePrefix("192.0.0.8/32")}
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a.updateDomains([]string{"example.com"})
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if err := a.ObserveDNSResponse(dnsResponse("example.com.", "192.0.0.8")); err != nil {
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t.Errorf("ObserveDNSResponse: %v", err)
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}
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a.Wait(ctx)
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if got, want := rc.Routes(), wantRoutes; !slices.Equal(got, want) {
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t.Errorf("got %v; want %v", got, want)
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}
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// a CNAME record chain should result in a route being added if the chain
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// matches a routed domain.
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a.updateDomains([]string{"www.example.com", "example.com"})
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if err := a.ObserveDNSResponse(dnsCNAMEResponse("192.0.0.9", "www.example.com.", "chain.example.com.", "example.com.")); err != nil {
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t.Errorf("ObserveDNSResponse: %v", err)
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}
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a.Wait(ctx)
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wantRoutes = append(wantRoutes, netip.MustParsePrefix("192.0.0.9/32"))
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if got, want := rc.Routes(), wantRoutes; !slices.Equal(got, want) {
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t.Errorf("got %v; want %v", got, want)
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}
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// a CNAME record chain should result in a route being added if the chain
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// even if only found in the middle of the chain
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if err := a.ObserveDNSResponse(dnsCNAMEResponse("192.0.0.10", "outside.example.org.", "www.example.com.", "example.org.")); err != nil {
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t.Errorf("ObserveDNSResponse: %v", err)
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}
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a.Wait(ctx)
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wantRoutes = append(wantRoutes, netip.MustParsePrefix("192.0.0.10/32"))
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if got, want := rc.Routes(), wantRoutes; !slices.Equal(got, want) {
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t.Errorf("got %v; want %v", got, want)
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}
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wantRoutes = append(wantRoutes, netip.MustParsePrefix("2001:db8::1/128"))
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if err := a.ObserveDNSResponse(dnsResponse("example.com.", "2001:db8::1")); err != nil {
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t.Errorf("ObserveDNSResponse: %v", err)
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}
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a.Wait(ctx)
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if got, want := rc.Routes(), wantRoutes; !slices.Equal(got, want) {
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t.Errorf("got %v; want %v", got, want)
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}
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// don't re-advertise routes that have already been advertised
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if err := a.ObserveDNSResponse(dnsResponse("example.com.", "2001:db8::1")); err != nil {
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t.Errorf("ObserveDNSResponse: %v", err)
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}
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a.Wait(ctx)
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if !slices.Equal(rc.Routes(), wantRoutes) {
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t.Errorf("rc.Routes(): got %v; want %v", rc.Routes(), wantRoutes)
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}
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// don't advertise addresses that are already in a control provided route
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pfx := netip.MustParsePrefix("192.0.2.0/24")
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a.updateRoutes([]netip.Prefix{pfx})
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wantRoutes = append(wantRoutes, pfx)
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if err := a.ObserveDNSResponse(dnsResponse("example.com.", "192.0.2.1")); err != nil {
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t.Errorf("ObserveDNSResponse: %v", err)
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}
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a.Wait(ctx)
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if !slices.Equal(rc.Routes(), wantRoutes) {
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t.Errorf("rc.Routes(): got %v; want %v", rc.Routes(), wantRoutes)
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}
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if !slices.Contains(a.domains["example.com"], netip.MustParseAddr("192.0.2.1")) {
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t.Errorf("missing %v from %v", "192.0.2.1", a.domains["exmaple.com"])
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}
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if err := eventbustest.ExpectExactly(w,
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eqUpdate(appctype.RouteUpdate{Advertise: prefixes("192.0.0.8/32")}), // from initial DNS response, via example.com
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eventbustest.Type[appctype.RouteInfo](),
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eqUpdate(appctype.RouteUpdate{Advertise: prefixes("192.0.0.9/32")}), // from CNAME response
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eventbustest.Type[appctype.RouteInfo](),
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eqUpdate(appctype.RouteUpdate{Advertise: prefixes("192.0.0.10/32")}), // from CNAME response, mid-chain
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eventbustest.Type[appctype.RouteInfo](),
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eqUpdate(appctype.RouteUpdate{Advertise: prefixes("2001:db8::1/128")}), // v6 DNS response
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eventbustest.Type[appctype.RouteInfo](),
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eqUpdate(appctype.RouteUpdate{Advertise: prefixes("192.0.2.0/24")}), // additional prefix
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eventbustest.Type[appctype.RouteInfo](),
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// N.B. no update for 192.0.2.1 as it is already covered
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); err != nil {
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t.Error(err)
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}
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}
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}
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func TestWildcardDomains(t *testing.T) {
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ctx := t.Context()
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bus := eventbustest.NewBus(t)
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for _, shouldStore := range []bool{false, true} {
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w := eventbustest.NewWatcher(t, bus)
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rc := &appctest.RouteCollector{}
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a := NewAppConnector(Config{
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Logf: t.Logf,
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EventBus: bus,
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RouteAdvertiser: rc,
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HasStoredRoutes: shouldStore,
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})
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t.Cleanup(a.Close)
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a.updateDomains([]string{"*.example.com"})
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if err := a.ObserveDNSResponse(dnsResponse("foo.example.com.", "192.0.0.8")); err != nil {
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t.Errorf("ObserveDNSResponse: %v", err)
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}
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a.Wait(ctx)
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if got, want := rc.Routes(), []netip.Prefix{netip.MustParsePrefix("192.0.0.8/32")}; !slices.Equal(got, want) {
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t.Errorf("routes: got %v; want %v", got, want)
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}
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if got, want := a.wildcards, []string{"example.com"}; !slices.Equal(got, want) {
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t.Errorf("wildcards: got %v; want %v", got, want)
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}
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a.updateDomains([]string{"*.example.com", "example.com"})
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if _, ok := a.domains["foo.example.com"]; !ok {
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t.Errorf("expected foo.example.com to be preserved in domains due to wildcard")
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}
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if got, want := a.wildcards, []string{"example.com"}; !slices.Equal(got, want) {
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t.Errorf("wildcards: got %v; want %v", got, want)
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}
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// There was an early regression where the wildcard domain was added repeatedly, this guards against that.
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a.updateDomains([]string{"*.example.com", "example.com"})
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if len(a.wildcards) != 1 {
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t.Errorf("expected only one wildcard domain, got %v", a.wildcards)
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}
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if err := eventbustest.ExpectExactly(w,
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eqUpdate(appctype.RouteUpdate{Advertise: prefixes("192.0.0.8/32")}),
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eventbustest.Type[appctype.RouteInfo](),
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); err != nil {
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t.Error(err)
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}
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}
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}
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// dnsResponse is a test helper that creates a DNS response buffer for the given domain and address
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func dnsResponse(domain, address string) []byte {
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addr := netip.MustParseAddr(address)
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b := dnsmessage.NewBuilder(nil, dnsmessage.Header{})
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b.EnableCompression()
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b.StartAnswers()
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switch addr.BitLen() {
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case 32:
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b.AResource(
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dnsmessage.ResourceHeader{
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Name: dnsmessage.MustNewName(domain),
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Type: dnsmessage.TypeA,
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Class: dnsmessage.ClassINET,
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TTL: 0,
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},
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dnsmessage.AResource{
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A: addr.As4(),
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},
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)
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case 128:
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b.AAAAResource(
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dnsmessage.ResourceHeader{
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Name: dnsmessage.MustNewName(domain),
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Type: dnsmessage.TypeAAAA,
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Class: dnsmessage.ClassINET,
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TTL: 0,
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},
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dnsmessage.AAAAResource{
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AAAA: addr.As16(),
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},
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)
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default:
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panic("invalid address length")
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}
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return must.Get(b.Finish())
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}
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func dnsCNAMEResponse(address string, domains ...string) []byte {
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addr := netip.MustParseAddr(address)
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b := dnsmessage.NewBuilder(nil, dnsmessage.Header{})
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b.EnableCompression()
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b.StartAnswers()
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if len(domains) >= 2 {
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for i, domain := range domains[:len(domains)-1] {
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b.CNAMEResource(
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dnsmessage.ResourceHeader{
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Name: dnsmessage.MustNewName(domain),
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Type: dnsmessage.TypeCNAME,
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Class: dnsmessage.ClassINET,
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TTL: 0,
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},
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dnsmessage.CNAMEResource{
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CNAME: dnsmessage.MustNewName(domains[i+1]),
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},
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)
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}
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}
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domain := domains[len(domains)-1]
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switch addr.BitLen() {
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case 32:
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b.AResource(
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dnsmessage.ResourceHeader{
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Name: dnsmessage.MustNewName(domain),
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Type: dnsmessage.TypeA,
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Class: dnsmessage.ClassINET,
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TTL: 0,
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},
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dnsmessage.AResource{
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A: addr.As4(),
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},
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)
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case 128:
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b.AAAAResource(
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|
dnsmessage.ResourceHeader{
|
|
Name: dnsmessage.MustNewName(domain),
|
|
Type: dnsmessage.TypeAAAA,
|
|
Class: dnsmessage.ClassINET,
|
|
TTL: 0,
|
|
},
|
|
dnsmessage.AAAAResource{
|
|
AAAA: addr.As16(),
|
|
},
|
|
)
|
|
default:
|
|
panic("invalid address length")
|
|
}
|
|
return must.Get(b.Finish())
|
|
}
|
|
|
|
func prefixEqual(a, b netip.Prefix) bool {
|
|
return a == b
|
|
}
|
|
|
|
func prefixCompare(a, b netip.Prefix) int {
|
|
if a.Addr().Compare(b.Addr()) == 0 {
|
|
return a.Bits() - b.Bits()
|
|
}
|
|
return a.Addr().Compare(b.Addr())
|
|
}
|
|
|
|
func prefixes(in ...string) []netip.Prefix {
|
|
toRet := make([]netip.Prefix, len(in))
|
|
for i, s := range in {
|
|
toRet[i] = netip.MustParsePrefix(s)
|
|
}
|
|
return toRet
|
|
}
|
|
|
|
func TestUpdateRouteRouteRemoval(t *testing.T) {
|
|
ctx := t.Context()
|
|
bus := eventbustest.NewBus(t)
|
|
for _, shouldStore := range []bool{false, true} {
|
|
w := eventbustest.NewWatcher(t, bus)
|
|
rc := &appctest.RouteCollector{}
|
|
|
|
assertRoutes := func(prefix string, routes, removedRoutes []netip.Prefix) {
|
|
if !slices.Equal(routes, rc.Routes()) {
|
|
t.Fatalf("%s: (shouldStore=%t) routes want %v, got %v", prefix, shouldStore, routes, rc.Routes())
|
|
}
|
|
if !slices.Equal(removedRoutes, rc.RemovedRoutes()) {
|
|
t.Fatalf("%s: (shouldStore=%t) removedRoutes want %v, got %v", prefix, shouldStore, removedRoutes, rc.RemovedRoutes())
|
|
}
|
|
}
|
|
|
|
a := NewAppConnector(Config{
|
|
Logf: t.Logf,
|
|
EventBus: bus,
|
|
RouteAdvertiser: rc,
|
|
HasStoredRoutes: shouldStore,
|
|
})
|
|
t.Cleanup(a.Close)
|
|
|
|
// nothing has yet been advertised
|
|
assertRoutes("appc init", []netip.Prefix{}, []netip.Prefix{})
|
|
|
|
a.UpdateDomainsAndRoutes([]string{}, prefixes("1.2.3.1/32", "1.2.3.2/32"))
|
|
a.Wait(ctx)
|
|
// the routes passed to UpdateDomainsAndRoutes have been advertised
|
|
assertRoutes("simple update", prefixes("1.2.3.1/32", "1.2.3.2/32"), []netip.Prefix{})
|
|
|
|
// one route the same, one different
|
|
a.UpdateDomainsAndRoutes([]string{}, prefixes("1.2.3.1/32", "1.2.3.3/32"))
|
|
a.Wait(ctx)
|
|
// old behavior: routes are not removed, resulting routes are both old and new
|
|
// (we have dupe 1.2.3.1 routes because the test RouteAdvertiser doesn't have the deduplication
|
|
// the real one does)
|
|
wantRoutes := prefixes("1.2.3.1/32", "1.2.3.2/32", "1.2.3.1/32", "1.2.3.3/32")
|
|
wantRemovedRoutes := []netip.Prefix{}
|
|
if shouldStore {
|
|
// new behavior: routes are removed, resulting routes are new only
|
|
wantRoutes = prefixes("1.2.3.1/32", "1.2.3.1/32", "1.2.3.3/32")
|
|
wantRemovedRoutes = prefixes("1.2.3.2/32")
|
|
}
|
|
assertRoutes("removal", wantRoutes, wantRemovedRoutes)
|
|
|
|
if err := eventbustest.Expect(w,
|
|
eqUpdate(appctype.RouteUpdate{Advertise: prefixes("1.2.3.1/32", "1.2.3.2/32")}), // no duplicates here
|
|
eventbustest.Type[appctype.RouteInfo](),
|
|
); err != nil {
|
|
t.Error(err)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestUpdateDomainRouteRemoval(t *testing.T) {
|
|
ctx := t.Context()
|
|
bus := eventbustest.NewBus(t)
|
|
for _, shouldStore := range []bool{false, true} {
|
|
w := eventbustest.NewWatcher(t, bus)
|
|
rc := &appctest.RouteCollector{}
|
|
|
|
assertRoutes := func(prefix string, routes, removedRoutes []netip.Prefix) {
|
|
if !slices.Equal(routes, rc.Routes()) {
|
|
t.Fatalf("%s: (shouldStore=%t) routes want %v, got %v", prefix, shouldStore, routes, rc.Routes())
|
|
}
|
|
if !slices.Equal(removedRoutes, rc.RemovedRoutes()) {
|
|
t.Fatalf("%s: (shouldStore=%t) removedRoutes want %v, got %v", prefix, shouldStore, removedRoutes, rc.RemovedRoutes())
|
|
}
|
|
}
|
|
|
|
a := NewAppConnector(Config{
|
|
Logf: t.Logf,
|
|
EventBus: bus,
|
|
RouteAdvertiser: rc,
|
|
HasStoredRoutes: shouldStore,
|
|
})
|
|
t.Cleanup(a.Close)
|
|
|
|
assertRoutes("appc init", []netip.Prefix{}, []netip.Prefix{})
|
|
|
|
a.UpdateDomainsAndRoutes([]string{"a.example.com", "b.example.com"}, []netip.Prefix{})
|
|
a.Wait(ctx)
|
|
// adding domains doesn't immediately cause any routes to be advertised
|
|
assertRoutes("update domains", []netip.Prefix{}, []netip.Prefix{})
|
|
|
|
for _, res := range [][]byte{
|
|
dnsResponse("a.example.com.", "1.2.3.1"),
|
|
dnsResponse("a.example.com.", "1.2.3.2"),
|
|
dnsResponse("b.example.com.", "1.2.3.3"),
|
|
dnsResponse("b.example.com.", "1.2.3.4"),
|
|
} {
|
|
if err := a.ObserveDNSResponse(res); err != nil {
|
|
t.Errorf("ObserveDNSResponse: %v", err)
|
|
}
|
|
}
|
|
a.Wait(ctx)
|
|
// observing dns responses causes routes to be advertised
|
|
assertRoutes("observed dns", prefixes("1.2.3.1/32", "1.2.3.2/32", "1.2.3.3/32", "1.2.3.4/32"), []netip.Prefix{})
|
|
|
|
a.UpdateDomainsAndRoutes([]string{"a.example.com"}, []netip.Prefix{})
|
|
a.Wait(ctx)
|
|
// old behavior, routes are not removed
|
|
wantRoutes := prefixes("1.2.3.1/32", "1.2.3.2/32", "1.2.3.3/32", "1.2.3.4/32")
|
|
wantRemovedRoutes := []netip.Prefix{}
|
|
if shouldStore {
|
|
// new behavior, routes are removed for b.example.com
|
|
wantRoutes = prefixes("1.2.3.1/32", "1.2.3.2/32")
|
|
wantRemovedRoutes = prefixes("1.2.3.3/32", "1.2.3.4/32")
|
|
}
|
|
assertRoutes("removal", wantRoutes, wantRemovedRoutes)
|
|
|
|
wantEvents := []any{
|
|
// Each DNS record observed triggers an update.
|
|
eqUpdate(appctype.RouteUpdate{Advertise: prefixes("1.2.3.1/32")}),
|
|
eqUpdate(appctype.RouteUpdate{Advertise: prefixes("1.2.3.2/32")}),
|
|
eqUpdate(appctype.RouteUpdate{Advertise: prefixes("1.2.3.3/32")}),
|
|
eqUpdate(appctype.RouteUpdate{Advertise: prefixes("1.2.3.4/32")}),
|
|
}
|
|
if shouldStore {
|
|
wantEvents = append(wantEvents, eqUpdate(appctype.RouteUpdate{
|
|
Unadvertise: prefixes("1.2.3.3/32", "1.2.3.4/32"),
|
|
}))
|
|
}
|
|
if err := eventbustest.Expect(w, wantEvents...); err != nil {
|
|
t.Error(err)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestUpdateWildcardRouteRemoval(t *testing.T) {
|
|
ctx := t.Context()
|
|
bus := eventbustest.NewBus(t)
|
|
for _, shouldStore := range []bool{false, true} {
|
|
w := eventbustest.NewWatcher(t, bus)
|
|
rc := &appctest.RouteCollector{}
|
|
|
|
assertRoutes := func(prefix string, routes, removedRoutes []netip.Prefix) {
|
|
if !slices.Equal(routes, rc.Routes()) {
|
|
t.Fatalf("%s: (shouldStore=%t) routes want %v, got %v", prefix, shouldStore, routes, rc.Routes())
|
|
}
|
|
if !slices.Equal(removedRoutes, rc.RemovedRoutes()) {
|
|
t.Fatalf("%s: (shouldStore=%t) removedRoutes want %v, got %v", prefix, shouldStore, removedRoutes, rc.RemovedRoutes())
|
|
}
|
|
}
|
|
|
|
a := NewAppConnector(Config{
|
|
Logf: t.Logf,
|
|
EventBus: bus,
|
|
RouteAdvertiser: rc,
|
|
HasStoredRoutes: shouldStore,
|
|
})
|
|
t.Cleanup(a.Close)
|
|
|
|
assertRoutes("appc init", []netip.Prefix{}, []netip.Prefix{})
|
|
|
|
a.UpdateDomainsAndRoutes([]string{"a.example.com", "*.b.example.com"}, []netip.Prefix{})
|
|
a.Wait(ctx)
|
|
// adding domains doesn't immediately cause any routes to be advertised
|
|
assertRoutes("update domains", []netip.Prefix{}, []netip.Prefix{})
|
|
|
|
for _, res := range [][]byte{
|
|
dnsResponse("a.example.com.", "1.2.3.1"),
|
|
dnsResponse("a.example.com.", "1.2.3.2"),
|
|
dnsResponse("1.b.example.com.", "1.2.3.3"),
|
|
dnsResponse("2.b.example.com.", "1.2.3.4"),
|
|
} {
|
|
if err := a.ObserveDNSResponse(res); err != nil {
|
|
t.Errorf("ObserveDNSResponse: %v", err)
|
|
}
|
|
}
|
|
a.Wait(ctx)
|
|
// observing dns responses causes routes to be advertised
|
|
assertRoutes("observed dns", prefixes("1.2.3.1/32", "1.2.3.2/32", "1.2.3.3/32", "1.2.3.4/32"), []netip.Prefix{})
|
|
|
|
a.UpdateDomainsAndRoutes([]string{"a.example.com"}, []netip.Prefix{})
|
|
a.Wait(ctx)
|
|
// old behavior, routes are not removed
|
|
wantRoutes := prefixes("1.2.3.1/32", "1.2.3.2/32", "1.2.3.3/32", "1.2.3.4/32")
|
|
wantRemovedRoutes := []netip.Prefix{}
|
|
if shouldStore {
|
|
// new behavior, routes are removed for *.b.example.com
|
|
wantRoutes = prefixes("1.2.3.1/32", "1.2.3.2/32")
|
|
wantRemovedRoutes = prefixes("1.2.3.3/32", "1.2.3.4/32")
|
|
}
|
|
assertRoutes("removal", wantRoutes, wantRemovedRoutes)
|
|
|
|
wantEvents := []any{
|
|
// Each DNS record observed triggers an update.
|
|
eqUpdate(appctype.RouteUpdate{Advertise: prefixes("1.2.3.1/32")}),
|
|
eqUpdate(appctype.RouteUpdate{Advertise: prefixes("1.2.3.2/32")}),
|
|
eqUpdate(appctype.RouteUpdate{Advertise: prefixes("1.2.3.3/32")}),
|
|
eqUpdate(appctype.RouteUpdate{Advertise: prefixes("1.2.3.4/32")}),
|
|
}
|
|
if shouldStore {
|
|
wantEvents = append(wantEvents, eqUpdate(appctype.RouteUpdate{
|
|
Unadvertise: prefixes("1.2.3.3/32", "1.2.3.4/32"),
|
|
}))
|
|
}
|
|
if err := eventbustest.Expect(w, wantEvents...); err != nil {
|
|
t.Error(err)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestRoutesWithout(t *testing.T) {
|
|
assert := func(msg string, got, want []netip.Prefix) {
|
|
if !slices.Equal(want, got) {
|
|
t.Errorf("%s: want %v, got %v", msg, want, got)
|
|
}
|
|
}
|
|
|
|
assert("empty routes", routesWithout([]netip.Prefix{}, []netip.Prefix{}), []netip.Prefix{})
|
|
assert("a empty", routesWithout([]netip.Prefix{}, prefixes("1.1.1.1/32", "1.1.1.2/32")), []netip.Prefix{})
|
|
assert("b empty", routesWithout(prefixes("1.1.1.1/32", "1.1.1.2/32"), []netip.Prefix{}), prefixes("1.1.1.1/32", "1.1.1.2/32"))
|
|
assert("no overlap", routesWithout(prefixes("1.1.1.1/32", "1.1.1.2/32"), prefixes("1.1.1.3/32", "1.1.1.4/32")), prefixes("1.1.1.1/32", "1.1.1.2/32"))
|
|
assert("a has fewer", routesWithout(prefixes("1.1.1.1/32", "1.1.1.2/32"), prefixes("1.1.1.1/32", "1.1.1.2/32", "1.1.1.3/32", "1.1.1.4/32")), []netip.Prefix{})
|
|
assert("a has more", routesWithout(prefixes("1.1.1.1/32", "1.1.1.2/32", "1.1.1.3/32", "1.1.1.4/32"), prefixes("1.1.1.1/32", "1.1.1.3/32")), prefixes("1.1.1.2/32", "1.1.1.4/32"))
|
|
}
|
|
|
|
func TestRateLogger(t *testing.T) {
|
|
clock := tstest.Clock{}
|
|
wasCalled := false
|
|
rl := newRateLogger(func() time.Time { return clock.Now() }, 1*time.Second, func(count int64, _ time.Time, _ int64) {
|
|
if count != 3 {
|
|
t.Fatalf("count for prev period: got %d, want 3", count)
|
|
}
|
|
wasCalled = true
|
|
})
|
|
|
|
for i := 0; i < 3; i++ {
|
|
clock.Advance(1 * time.Millisecond)
|
|
rl.update(0)
|
|
if wasCalled {
|
|
t.Fatalf("wasCalled: got true, want false")
|
|
}
|
|
}
|
|
|
|
clock.Advance(1 * time.Second)
|
|
rl.update(0)
|
|
if !wasCalled {
|
|
t.Fatalf("wasCalled: got false, want true")
|
|
}
|
|
|
|
wasCalled = false
|
|
rl = newRateLogger(func() time.Time { return clock.Now() }, 1*time.Hour, func(count int64, _ time.Time, _ int64) {
|
|
if count != 3 {
|
|
t.Fatalf("count for prev period: got %d, want 3", count)
|
|
}
|
|
wasCalled = true
|
|
})
|
|
|
|
for i := 0; i < 3; i++ {
|
|
clock.Advance(1 * time.Minute)
|
|
rl.update(0)
|
|
if wasCalled {
|
|
t.Fatalf("wasCalled: got true, want false")
|
|
}
|
|
}
|
|
|
|
clock.Advance(1 * time.Hour)
|
|
rl.update(0)
|
|
if !wasCalled {
|
|
t.Fatalf("wasCalled: got false, want true")
|
|
}
|
|
}
|
|
|
|
func TestRouteStoreMetrics(t *testing.T) {
|
|
metricStoreRoutes(1, 1)
|
|
metricStoreRoutes(1, 1) // the 1 buckets value should be 2
|
|
metricStoreRoutes(5, 5) // the 5 buckets value should be 1
|
|
metricStoreRoutes(6, 6) // the 10 buckets value should be 1
|
|
metricStoreRoutes(10001, 10001) // the over buckets value should be 1
|
|
wanted := map[string]int64{
|
|
"appc_store_routes_n_routes_1": 2,
|
|
"appc_store_routes_rate_1": 2,
|
|
"appc_store_routes_n_routes_5": 1,
|
|
"appc_store_routes_rate_5": 1,
|
|
"appc_store_routes_n_routes_10": 1,
|
|
"appc_store_routes_rate_10": 1,
|
|
"appc_store_routes_n_routes_over": 1,
|
|
"appc_store_routes_rate_over": 1,
|
|
}
|
|
for _, x := range clientmetric.Metrics() {
|
|
if x.Value() != wanted[x.Name()] {
|
|
t.Errorf("%s: want: %d, got: %d", x.Name(), wanted[x.Name()], x.Value())
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestMetricBucketsAreSorted(t *testing.T) {
|
|
if !slices.IsSorted(metricStoreRoutesRateBuckets) {
|
|
t.Errorf("metricStoreRoutesRateBuckets must be in order")
|
|
}
|
|
if !slices.IsSorted(metricStoreRoutesNBuckets) {
|
|
t.Errorf("metricStoreRoutesNBuckets must be in order")
|
|
}
|
|
}
|
|
|
|
// TestUpdateRoutesDeadlock is a regression test for a deadlock in
|
|
// LocalBackend<->AppConnector interaction. When using real LocalBackend as the
|
|
// routeAdvertiser, calls to Advertise/UnadvertiseRoutes can end up calling
|
|
// back into AppConnector via authReconfig. If everything is called
|
|
// synchronously, this results in a deadlock on AppConnector.mu.
|
|
//
|
|
// TODO(creachadair, 2025-09-18): Remove this along with the advertiser
|
|
// interface once the LocalBackend is switched to use the event bus and the
|
|
// tests have been updated not to need it.
|
|
func TestUpdateRoutesDeadlock(t *testing.T) {
|
|
ctx := t.Context()
|
|
bus := eventbustest.NewBus(t)
|
|
w := eventbustest.NewWatcher(t, bus)
|
|
rc := &appctest.RouteCollector{}
|
|
a := NewAppConnector(Config{
|
|
Logf: t.Logf,
|
|
EventBus: bus,
|
|
RouteAdvertiser: rc,
|
|
HasStoredRoutes: true,
|
|
})
|
|
t.Cleanup(a.Close)
|
|
|
|
advertiseCalled := new(atomic.Bool)
|
|
unadvertiseCalled := new(atomic.Bool)
|
|
rc.AdvertiseCallback = func() {
|
|
// Call something that requires a.mu to be held.
|
|
a.DomainRoutes()
|
|
advertiseCalled.Store(true)
|
|
}
|
|
rc.UnadvertiseCallback = func() {
|
|
// Call something that requires a.mu to be held.
|
|
a.DomainRoutes()
|
|
unadvertiseCalled.Store(true)
|
|
}
|
|
|
|
a.updateDomains([]string{"example.com"})
|
|
a.Wait(ctx)
|
|
|
|
// Trigger rc.AdveriseRoute.
|
|
a.updateRoutes(
|
|
[]netip.Prefix{
|
|
netip.MustParsePrefix("127.0.0.1/32"),
|
|
netip.MustParsePrefix("127.0.0.2/32"),
|
|
},
|
|
)
|
|
a.Wait(ctx)
|
|
// Trigger rc.UnadveriseRoute.
|
|
a.updateRoutes(
|
|
[]netip.Prefix{
|
|
netip.MustParsePrefix("127.0.0.1/32"),
|
|
},
|
|
)
|
|
a.Wait(ctx)
|
|
|
|
if !advertiseCalled.Load() {
|
|
t.Error("AdvertiseRoute was not called")
|
|
}
|
|
if !unadvertiseCalled.Load() {
|
|
t.Error("UnadvertiseRoute was not called")
|
|
}
|
|
|
|
if want := []netip.Prefix{netip.MustParsePrefix("127.0.0.1/32")}; !slices.Equal(slices.Compact(rc.Routes()), want) {
|
|
t.Fatalf("got %v, want %v", rc.Routes(), want)
|
|
}
|
|
|
|
if err := eventbustest.ExpectExactly(w,
|
|
eqUpdate(appctype.RouteUpdate{Advertise: prefixes("127.0.0.1/32", "127.0.0.2/32")}),
|
|
eventbustest.Type[appctype.RouteInfo](),
|
|
eqUpdate(appctype.RouteUpdate{Advertise: prefixes("127.0.0.1/32"), Unadvertise: prefixes("127.0.0.2/32")}),
|
|
eventbustest.Type[appctype.RouteInfo](),
|
|
); err != nil {
|
|
t.Error(err)
|
|
}
|
|
}
|
|
|
|
type textUpdate struct {
|
|
Advertise []string
|
|
Unadvertise []string
|
|
}
|
|
|
|
func routeUpdateToText(u appctype.RouteUpdate) textUpdate {
|
|
var out textUpdate
|
|
for _, p := range u.Advertise {
|
|
out.Advertise = append(out.Advertise, p.String())
|
|
}
|
|
for _, p := range u.Unadvertise {
|
|
out.Unadvertise = append(out.Unadvertise, p.String())
|
|
}
|
|
return out
|
|
}
|
|
|
|
// eqUpdate generates an eventbus test filter that matches a appctype.RouteUpdate
|
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// message equal to want, or reports an error giving a human-readable diff.
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func eqUpdate(want appctype.RouteUpdate) func(appctype.RouteUpdate) error {
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return func(got appctype.RouteUpdate) error {
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if diff := cmp.Diff(routeUpdateToText(got), routeUpdateToText(want),
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cmpopts.SortSlices(stdcmp.Less[string]),
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); diff != "" {
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return fmt.Errorf("wrong update (-got, +want):\n%s", diff)
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}
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return nil
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}
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}
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