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appc: add flag shouldStoreRoutes and controlknob for it 

When an app connector is reconfigured and domains to route are removed,
we would like to no longer advertise routes that were discovered for
those domains. In order to do this we plan to store which routes were
discovered for which domains.

Add a controlknob so that we can enable/disable the new behavior.

Updates #11008
Signed-off-by: Fran Bull <fran@tailscale.com>
This commit is contained in:
Fran Bull 2024-04-11 10:12:13 -07:00
parent af32580cfb
commit 9494209767
7 changed files with 443 additions and 321 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
appc/appconnector.go
View File

@ -62,6 +62,9 @@ type AppConnector struct {
logf logger.Logf
routeAdvertiser RouteAdvertiser
// storeRoutesFunc will be called to persist routes if it is not nil.
storeRoutesFunc func(*RouteInfo) error
// mu guards the fields that follow
mu sync.Mutex
@ -80,11 +83,24 @@ type AppConnector struct {
}
// NewAppConnector creates a new AppConnector.
func NewAppConnector(logf logger.Logf, routeAdvertiser RouteAdvertiser) *AppConnector {
return &AppConnector{
func NewAppConnector(logf logger.Logf, routeAdvertiser RouteAdvertiser, routeInfo *RouteInfo, storeRoutesFunc func(*RouteInfo) error) *AppConnector {
ac := &AppConnector{
logf: logger.WithPrefix(logf, "appc: "),
routeAdvertiser: routeAdvertiser,
storeRoutesFunc: storeRoutesFunc,
}
if routeInfo != nil {
ac.domains = routeInfo.Domains
ac.wildcards = routeInfo.Wildcards
ac.controlRoutes = routeInfo.Control
}
return ac
}
// ShouldStoreRoutes returns true if the appconnector was created with the controlknob on
// and is storing its discovered routes persistently.
func (e *AppConnector) ShouldStoreRoutes() bool {
return e.storeRoutesFunc != nil
}
// UpdateDomainsAndRoutes starts an asynchronous update of the configuration

326
appc/appconnector_test.go
View File

@ -17,194 +17,238 @@ import (
"tailscale.com/util/must"
)
func fakeStoreRoutes(*RouteInfo) error { return nil }
func TestUpdateDomains(t *testing.T) {
ctx := context.Background()
a := NewAppConnector(t.Logf, nil)
a.UpdateDomains([]string{"example.com"})
for _, shouldStore := range []bool{false, true} {
ctx := context.Background()
var a *AppConnector
if shouldStore {
a = NewAppConnector(t.Logf, nil, &RouteInfo{}, fakeStoreRoutes)
} else {
a = NewAppConnector(t.Logf, nil, nil, nil)
}
a.UpdateDomains([]string{"example.com"})
a.Wait(ctx)
if got, want := a.Domains().AsSlice(), []string{"example.com"}; !slices.Equal(got, want) {
t.Errorf("got %v; want %v", got, want)
}
a.Wait(ctx)
if got, want := a.Domains().AsSlice(), []string{"example.com"}; !slices.Equal(got, want) {
t.Errorf("got %v; want %v", got, want)
}
addr := netip.MustParseAddr("192.0.0.8")
a.domains["example.com"] = append(a.domains["example.com"], addr)
a.UpdateDomains([]string{"example.com"})
a.Wait(ctx)
addr := netip.MustParseAddr("192.0.0.8")
a.domains["example.com"] = append(a.domains["example.com"], addr)
a.UpdateDomains([]string{"example.com"})
a.Wait(ctx)
if got, want := a.domains["example.com"], []netip.Addr{addr}; !slices.Equal(got, want) {
t.Errorf("got %v; want %v", got, want)
}
if got, want := a.domains["example.com"], []netip.Addr{addr}; !slices.Equal(got, want) {
t.Errorf("got %v; want %v", got, want)
}
// domains are explicitly downcased on set.
a.UpdateDomains([]string{"UP.EXAMPLE.COM"})
a.Wait(ctx)
if got, want := xmaps.Keys(a.domains), []string{"up.example.com"}; !slices.Equal(got, want) {
t.Errorf("got %v; want %v", got, want)
// domains are explicitly downcased on set.
a.UpdateDomains([]string{"UP.EXAMPLE.COM"})
a.Wait(ctx)
if got, want := xmaps.Keys(a.domains), []string{"up.example.com"}; !slices.Equal(got, want) {
t.Errorf("got %v; want %v", got, want)
}
}
}
func TestUpdateRoutes(t *testing.T) {
ctx := context.Background()
rc := &appctest.RouteCollector{}
a := NewAppConnector(t.Logf, rc)
a.updateDomains([]string{"*.example.com"})
for _, shouldStore := range []bool{false, true} {
ctx := context.Background()
rc := &appctest.RouteCollector{}
var a *AppConnector
if shouldStore {
a = NewAppConnector(t.Logf, rc, &RouteInfo{}, fakeStoreRoutes)
} else {
a = NewAppConnector(t.Logf, rc, nil, nil)
}
a.updateDomains([]string{"*.example.com"})
// This route should be collapsed into the range
a.ObserveDNSResponse(dnsResponse("a.example.com.", "192.0.2.1"))
a.Wait(ctx)
// This route should be collapsed into the range
a.ObserveDNSResponse(dnsResponse("a.example.com.", "192.0.2.1"))
a.Wait(ctx)
if !slices.Equal(rc.Routes(), []netip.Prefix{netip.MustParsePrefix("192.0.2.1/32")}) {
t.Fatalf("got %v, want %v", rc.Routes(), []netip.Prefix{netip.MustParsePrefix("192.0.2.1/32")})
}
if !slices.Equal(rc.Routes(), []netip.Prefix{netip.MustParsePrefix("192.0.2.1/32")}) {
t.Fatalf("got %v, want %v", rc.Routes(), []netip.Prefix{netip.MustParsePrefix("192.0.2.1/32")})
}
// This route should not be collapsed or removed
a.ObserveDNSResponse(dnsResponse("b.example.com.", "192.0.0.1"))
a.Wait(ctx)
// This route should not be collapsed or removed
a.ObserveDNSResponse(dnsResponse("b.example.com.", "192.0.0.1"))
a.Wait(ctx)
routes := []netip.Prefix{netip.MustParsePrefix("192.0.2.0/24"), netip.MustParsePrefix("192.0.0.1/32")}
a.updateRoutes(routes)
routes := []netip.Prefix{netip.MustParsePrefix("192.0.2.0/24"), netip.MustParsePrefix("192.0.0.1/32")}
a.updateRoutes(routes)
slices.SortFunc(rc.Routes(), prefixCompare)
rc.SetRoutes(slices.Compact(rc.Routes()))
slices.SortFunc(routes, prefixCompare)
slices.SortFunc(rc.Routes(), prefixCompare)
rc.SetRoutes(slices.Compact(rc.Routes()))
slices.SortFunc(routes, prefixCompare)
// Ensure that the non-matching /32 is preserved, even though it's in the domains table.
if !slices.EqualFunc(routes, rc.Routes(), prefixEqual) {
t.Errorf("added routes: got %v, want %v", rc.Routes(), routes)
}
// Ensure that the non-matching /32 is preserved, even though it's in the domains table.
if !slices.EqualFunc(routes, rc.Routes(), prefixEqual) {
t.Errorf("added routes: got %v, want %v", rc.Routes(), routes)
}
// Ensure that the contained /32 is removed, replaced by the /24.
wantRemoved := []netip.Prefix{netip.MustParsePrefix("192.0.2.1/32")}
if !slices.EqualFunc(rc.RemovedRoutes(), wantRemoved, prefixEqual) {
t.Fatalf("unexpected removed routes: %v", rc.RemovedRoutes())
// Ensure that the contained /32 is removed, replaced by the /24.
wantRemoved := []netip.Prefix{netip.MustParsePrefix("192.0.2.1/32")}
if !slices.EqualFunc(rc.RemovedRoutes(), wantRemoved, prefixEqual) {
t.Fatalf("unexpected removed routes: %v", rc.RemovedRoutes())
}
}
}
func TestUpdateRoutesUnadvertisesContainedRoutes(t *testing.T) {
rc := &appctest.RouteCollector{}
a := NewAppConnector(t.Logf, rc)
mak.Set(&a.domains, "example.com", []netip.Addr{netip.MustParseAddr("192.0.2.1")})
rc.SetRoutes([]netip.Prefix{netip.MustParsePrefix("192.0.2.1/32")})
routes := []netip.Prefix{netip.MustParsePrefix("192.0.2.0/24")}
a.updateRoutes(routes)
for _, shouldStore := range []bool{false, true} {
rc := &appctest.RouteCollector{}
var a *AppConnector
if shouldStore {
a = NewAppConnector(t.Logf, rc, &RouteInfo{}, fakeStoreRoutes)
} else {
a = NewAppConnector(t.Logf, rc, nil, nil)
}
mak.Set(&a.domains, "example.com", []netip.Addr{netip.MustParseAddr("192.0.2.1")})
rc.SetRoutes([]netip.Prefix{netip.MustParsePrefix("192.0.2.1/32")})
routes := []netip.Prefix{netip.MustParsePrefix("192.0.2.0/24")}
a.updateRoutes(routes)
if !slices.EqualFunc(routes, rc.Routes(), prefixEqual) {
t.Fatalf("got %v, want %v", rc.Routes(), routes)
if !slices.EqualFunc(routes, rc.Routes(), prefixEqual) {
t.Fatalf("got %v, want %v", rc.Routes(), routes)
}
}
}
func TestDomainRoutes(t *testing.T) {
rc := &appctest.RouteCollector{}
a := NewAppConnector(t.Logf, rc)
a.updateDomains([]string{"example.com"})
a.ObserveDNSResponse(dnsResponse("example.com.", "192.0.0.8"))
a.Wait(context.Background())
for _, shouldStore := range []bool{false, true} {
rc := &appctest.RouteCollector{}
var a *AppConnector
if shouldStore {
a = NewAppConnector(t.Logf, rc, &RouteInfo{}, fakeStoreRoutes)
} else {
a = NewAppConnector(t.Logf, rc, nil, nil)
}
a.updateDomains([]string{"example.com"})
a.ObserveDNSResponse(dnsResponse("example.com.", "192.0.0.8"))
a.Wait(context.Background())
want := map[string][]netip.Addr{
"example.com": {netip.MustParseAddr("192.0.0.8")},
}
want := map[string][]netip.Addr{
"example.com": {netip.MustParseAddr("192.0.0.8")},
}
if got := a.DomainRoutes(); !reflect.DeepEqual(got, want) {
t.Fatalf("DomainRoutes: got %v, want %v", got, want)
if got := a.DomainRoutes(); !reflect.DeepEqual(got, want) {
t.Fatalf("DomainRoutes: got %v, want %v", got, want)
}
}
}
func TestObserveDNSResponse(t *testing.T) {
ctx := context.Background()
rc := &appctest.RouteCollector{}
a := NewAppConnector(t.Logf, rc)
for _, shouldStore := range []bool{false, true} {
ctx := context.Background()
rc := &appctest.RouteCollector{}
var a *AppConnector
if shouldStore {
a = NewAppConnector(t.Logf, rc, &RouteInfo{}, fakeStoreRoutes)
} else {
a = NewAppConnector(t.Logf, rc, nil, nil)
}
// a has no domains configured, so it should not advertise any routes
a.ObserveDNSResponse(dnsResponse("example.com.", "192.0.0.8"))
if got, want := rc.Routes(), ([]netip.Prefix)(nil); !slices.Equal(got, want) {
t.Errorf("got %v; want %v", got, want)
}
// a has no domains configured, so it should not advertise any routes
a.ObserveDNSResponse(dnsResponse("example.com.", "192.0.0.8"))
if got, want := rc.Routes(), ([]netip.Prefix)(nil); !slices.Equal(got, want) {
t.Errorf("got %v; want %v", got, want)
}
wantRoutes := []netip.Prefix{netip.MustParsePrefix("192.0.0.8/32")}
wantRoutes := []netip.Prefix{netip.MustParsePrefix("192.0.0.8/32")}
a.updateDomains([]string{"example.com"})
a.ObserveDNSResponse(dnsResponse("example.com.", "192.0.0.8"))
a.Wait(ctx)
if got, want := rc.Routes(), wantRoutes; !slices.Equal(got, want) {
t.Errorf("got %v; want %v", got, want)
}
a.updateDomains([]string{"example.com"})
a.ObserveDNSResponse(dnsResponse("example.com.", "192.0.0.8"))
a.Wait(ctx)
if got, want := rc.Routes(), wantRoutes; !slices.Equal(got, want) {
t.Errorf("got %v; want %v", got, want)
}
// a CNAME record chain should result in a route being added if the chain
// matches a routed domain.
a.updateDomains([]string{"www.example.com", "example.com"})
a.ObserveDNSResponse(dnsCNAMEResponse("192.0.0.9", "www.example.com.", "chain.example.com.", "example.com."))
a.Wait(ctx)
wantRoutes = append(wantRoutes, netip.MustParsePrefix("192.0.0.9/32"))
if got, want := rc.Routes(), wantRoutes; !slices.Equal(got, want) {
t.Errorf("got %v; want %v", got, want)
}
// a CNAME record chain should result in a route being added if the chain
// matches a routed domain.
a.updateDomains([]string{"www.example.com", "example.com"})
a.ObserveDNSResponse(dnsCNAMEResponse("192.0.0.9", "www.example.com.", "chain.example.com.", "example.com."))
a.Wait(ctx)
wantRoutes = append(wantRoutes, netip.MustParsePrefix("192.0.0.9/32"))
if got, want := rc.Routes(), wantRoutes; !slices.Equal(got, want) {
t.Errorf("got %v; want %v", got, want)
}
// a CNAME record chain should result in a route being added if the chain
// even if only found in the middle of the chain
a.ObserveDNSResponse(dnsCNAMEResponse("192.0.0.10", "outside.example.org.", "www.example.com.", "example.org."))
a.Wait(ctx)
wantRoutes = append(wantRoutes, netip.MustParsePrefix("192.0.0.10/32"))
if got, want := rc.Routes(), wantRoutes; !slices.Equal(got, want) {
t.Errorf("got %v; want %v", got, want)
}
// a CNAME record chain should result in a route being added if the chain
// even if only found in the middle of the chain
a.ObserveDNSResponse(dnsCNAMEResponse("192.0.0.10", "outside.example.org.", "www.example.com.", "example.org."))
a.Wait(ctx)
wantRoutes = append(wantRoutes, netip.MustParsePrefix("192.0.0.10/32"))
if got, want := rc.Routes(), wantRoutes; !slices.Equal(got, want) {
t.Errorf("got %v; want %v", got, want)
}
wantRoutes = append(wantRoutes, netip.MustParsePrefix("2001:db8::1/128"))
wantRoutes = append(wantRoutes, netip.MustParsePrefix("2001:db8::1/128"))
a.ObserveDNSResponse(dnsResponse("example.com.", "2001:db8::1"))
a.Wait(ctx)
if got, want := rc.Routes(), wantRoutes; !slices.Equal(got, want) {
t.Errorf("got %v; want %v", got, want)
}
a.ObserveDNSResponse(dnsResponse("example.com.", "2001:db8::1"))
a.Wait(ctx)
if got, want := rc.Routes(), wantRoutes; !slices.Equal(got, want) {
t.Errorf("got %v; want %v", got, want)
}
// don't re-advertise routes that have already been advertised
a.ObserveDNSResponse(dnsResponse("example.com.", "2001:db8::1"))
a.Wait(ctx)
if !slices.Equal(rc.Routes(), wantRoutes) {
t.Errorf("rc.Routes(): got %v; want %v", rc.Routes(), wantRoutes)
}
// don't re-advertise routes that have already been advertised
a.ObserveDNSResponse(dnsResponse("example.com.", "2001:db8::1"))
a.Wait(ctx)
if !slices.Equal(rc.Routes(), wantRoutes) {
t.Errorf("rc.Routes(): got %v; want %v", rc.Routes(), wantRoutes)
}
// don't advertise addresses that are already in a control provided route
pfx := netip.MustParsePrefix("192.0.2.0/24")
a.updateRoutes([]netip.Prefix{pfx})
wantRoutes = append(wantRoutes, pfx)
a.ObserveDNSResponse(dnsResponse("example.com.", "192.0.2.1"))
a.Wait(ctx)
if !slices.Equal(rc.Routes(), wantRoutes) {
t.Errorf("rc.Routes(): got %v; want %v", rc.Routes(), wantRoutes)
}
if !slices.Contains(a.domains["example.com"], netip.MustParseAddr("192.0.2.1")) {
t.Errorf("missing %v from %v", "192.0.2.1", a.domains["exmaple.com"])
// don't advertise addresses that are already in a control provided route
pfx := netip.MustParsePrefix("192.0.2.0/24")
a.updateRoutes([]netip.Prefix{pfx})
wantRoutes = append(wantRoutes, pfx)
a.ObserveDNSResponse(dnsResponse("example.com.", "192.0.2.1"))
a.Wait(ctx)
if !slices.Equal(rc.Routes(), wantRoutes) {
t.Errorf("rc.Routes(): got %v; want %v", rc.Routes(), wantRoutes)
}
if !slices.Contains(a.domains["example.com"], netip.MustParseAddr("192.0.2.1")) {
t.Errorf("missing %v from %v", "192.0.2.1", a.domains["exmaple.com"])
}
}
}
func TestWildcardDomains(t *testing.T) {
ctx := context.Background()
rc := &appctest.RouteCollector{}
a := NewAppConnector(t.Logf, rc)
for _, shouldStore := range []bool{false, true} {
ctx := context.Background()
rc := &appctest.RouteCollector{}
var a *AppConnector
if shouldStore {
a = NewAppConnector(t.Logf, rc, &RouteInfo{}, fakeStoreRoutes)
} else {
a = NewAppConnector(t.Logf, rc, nil, nil)
}
a.updateDomains([]string{"*.example.com"})
a.ObserveDNSResponse(dnsResponse("foo.example.com.", "192.0.0.8"))
a.Wait(ctx)
if got, want := rc.Routes(), []netip.Prefix{netip.MustParsePrefix("192.0.0.8/32")}; !slices.Equal(got, want) {
t.Errorf("routes: got %v; want %v", got, want)
}
if got, want := a.wildcards, []string{"example.com"}; !slices.Equal(got, want) {
t.Errorf("wildcards: got %v; want %v", got, want)
}
a.updateDomains([]string{"*.example.com"})
a.ObserveDNSResponse(dnsResponse("foo.example.com.", "192.0.0.8"))
a.Wait(ctx)
if got, want := rc.Routes(), []netip.Prefix{netip.MustParsePrefix("192.0.0.8/32")}; !slices.Equal(got, want) {
t.Errorf("routes: got %v; want %v", got, want)
}
if got, want := a.wildcards, []string{"example.com"}; !slices.Equal(got, want) {
t.Errorf("wildcards: got %v; want %v", got, want)
}
a.updateDomains([]string{"*.example.com", "example.com"})
if _, ok := a.domains["foo.example.com"]; !ok {
t.Errorf("expected foo.example.com to be preserved in domains due to wildcard")
}
if got, want := a.wildcards, []string{"example.com"}; !slices.Equal(got, want) {
t.Errorf("wildcards: got %v; want %v", got, want)
}
a.updateDomains([]string{"*.example.com", "example.com"})
if _, ok := a.domains["foo.example.com"]; !ok {
t.Errorf("expected foo.example.com to be preserved in domains due to wildcard")
}
if got, want := a.wildcards, []string{"example.com"}; !slices.Equal(got, want) {
t.Errorf("wildcards: got %v; want %v", got, want)
}
// There was an early regression where the wildcard domain was added repeatedly, this guards against that.
a.updateDomains([]string{"*.example.com", "example.com"})
if len(a.wildcards) != 1 {
t.Errorf("expected only one wildcard domain, got %v", a.wildcards)
// There was an early regression where the wildcard domain was added repeatedly, this guards against that.
a.updateDomains([]string{"*.example.com", "example.com"})
if len(a.wildcards) != 1 {
t.Errorf("expected only one wildcard domain, got %v", a.wildcards)
}
}
}

7
control/controlknobs/controlknobs.go
View File

@ -72,6 +72,10 @@ type Knobs struct {
// ProbeUDPLifetime is whether the node should probe UDP path lifetime on
// the tail end of an active direct connection in magicsock.
ProbeUDPLifetime atomic.Bool
// AppCStoreRoutes is whether the node should store RouteInfo to StateStore
// if it's an app connector.
AppCStoreRoutes atomic.Bool
}
// UpdateFromNodeAttributes updates k (if non-nil) based on the provided self
@ -96,6 +100,7 @@ func (k *Knobs) UpdateFromNodeAttributes(capMap tailcfg.NodeCapMap) {
forceNfTables = has(tailcfg.NodeAttrLinuxMustUseNfTables)
seamlessKeyRenewal = has(tailcfg.NodeAttrSeamlessKeyRenewal)
probeUDPLifetime = has(tailcfg.NodeAttrProbeUDPLifetime)
appCStoreRoutes = has(tailcfg.NodeAttrStoreAppCRoutes)
)
if has(tailcfg.NodeAttrOneCGNATEnable) {
@ -118,6 +123,7 @@ func (k *Knobs) UpdateFromNodeAttributes(capMap tailcfg.NodeCapMap) {
k.LinuxForceNfTables.Store(forceNfTables)
k.SeamlessKeyRenewal.Store(seamlessKeyRenewal)
k.ProbeUDPLifetime.Store(probeUDPLifetime)
k.AppCStoreRoutes.Store(appCStoreRoutes)
}
// AsDebugJSON returns k as something that can be marshalled with json.Marshal
@ -141,5 +147,6 @@ func (k *Knobs) AsDebugJSON() map[string]any {
"LinuxForceNfTables": k.LinuxForceNfTables.Load(),
"SeamlessKeyRenewal": k.SeamlessKeyRenewal.Load(),
"ProbeUDPLifetime": k.ProbeUDPLifetime.Load(),
"AppCStoreRoutes": k.AppCStoreRoutes.Load(),
}
}

18
ipn/ipnlocal/local.go
View File

@ -3512,8 +3512,22 @@ func (b *LocalBackend) reconfigAppConnectorLocked(nm *netmap.NetworkMap, prefs i
return
}
if b.appConnector == nil {
b.appConnector = appc.NewAppConnector(b.logf, b)
shouldAppCStoreRoutes := b.ControlKnobs().AppCStoreRoutes.Load()
if b.appConnector == nil || b.appConnector.ShouldStoreRoutes() != shouldAppCStoreRoutes {
var ri *appc.RouteInfo
var storeFunc func(*appc.RouteInfo) error
if shouldAppCStoreRoutes {
var err error
ri, err = b.readRouteInfoLocked()
if err != nil {
ri = &appc.RouteInfo{}
if err != ipn.ErrStateNotExist {
b.logf("Unsuccessful Read RouteInfo: ", err)
}
}
storeFunc = b.storeRouteInfo
}
b.appConnector = appc.NewAppConnector(b.logf, b, ri, storeFunc)
}
if nm == nil {
return

52
ipn/ipnlocal/local_test.go
View File

@ -54,6 +54,8 @@ import (
"tailscale.com/wgengine/wgcfg"
)
func fakeStoreRoutes(*appc.RouteInfo) error { return nil }
func inRemove(ip netip.Addr) bool {
for _, pfx := range removeFromDefaultRoute {
if pfx.Contains(ip) {
@ -1290,13 +1292,19 @@ func TestDNSConfigForNetmapForExitNodeConfigs(t *testing.T) {
}
func TestOfferingAppConnector(t *testing.T) {
b := newTestBackend(t)
if b.OfferingAppConnector() {
t.Fatal("unexpected offering app connector")
}
b.appConnector = appc.NewAppConnector(t.Logf, nil)
if !b.OfferingAppConnector() {
t.Fatal("unexpected not offering app connector")
for _, shouldStore := range []bool{false, true} {
b := newTestBackend(t)
if b.OfferingAppConnector() {
t.Fatal("unexpected offering app connector")
}
if shouldStore {
b.appConnector = appc.NewAppConnector(t.Logf, nil, &appc.RouteInfo{}, fakeStoreRoutes)
} else {
b.appConnector = appc.NewAppConnector(t.Logf, nil, nil, nil)
}
if !b.OfferingAppConnector() {
t.Fatal("unexpected not offering app connector")
}
}
}
@ -1341,21 +1349,27 @@ func TestRouterAdvertiserIgnoresContainedRoutes(t *testing.T) {
}
func TestObserveDNSResponse(t *testing.T) {
b := newTestBackend(t)
for _, shouldStore := range []bool{false, true} {
b := newTestBackend(t)
// ensure no error when no app connector is configured
b.ObserveDNSResponse(dnsResponse("example.com.", "192.0.0.8"))
// ensure no error when no app connector is configured
b.ObserveDNSResponse(dnsResponse("example.com.", "192.0.0.8"))
rc := &appctest.RouteCollector{}
b.appConnector = appc.NewAppConnector(t.Logf, rc)
b.appConnector.UpdateDomains([]string{"example.com"})
b.appConnector.Wait(context.Background())
rc := &appctest.RouteCollector{}
if shouldStore {
b.appConnector = appc.NewAppConnector(t.Logf, rc, &appc.RouteInfo{}, fakeStoreRoutes)
} else {
b.appConnector = appc.NewAppConnector(t.Logf, rc, nil, nil)
}
b.appConnector.UpdateDomains([]string{"example.com"})
b.appConnector.Wait(context.Background())
b.ObserveDNSResponse(dnsResponse("example.com.", "192.0.0.8"))
b.appConnector.Wait(context.Background())
wantRoutes := []netip.Prefix{netip.MustParsePrefix("192.0.0.8/32")}
if !slices.Equal(rc.Routes(), wantRoutes) {
t.Fatalf("got routes %v, want %v", rc.Routes(), wantRoutes)
b.ObserveDNSResponse(dnsResponse("example.com.", "192.0.0.8"))
b.appConnector.Wait(context.Background())
wantRoutes := []netip.Prefix{netip.MustParsePrefix("192.0.0.8/32")}
if !slices.Equal(rc.Routes(), wantRoutes) {
t.Fatalf("got routes %v, want %v", rc.Routes(), wantRoutes)
}
}
}

338
ipn/ipnlocal/peerapi_test.go
View File

@ -687,185 +687,209 @@ func TestPeerAPIReplyToDNSQueries(t *testing.T) {
}
func TestPeerAPIPrettyReplyCNAME(t *testing.T) {
var h peerAPIHandler
h.remoteAddr = netip.MustParseAddrPort("100.150.151.152:12345")
for _, shouldStore := range []bool{false, true} {
var h peerAPIHandler
h.remoteAddr = netip.MustParseAddrPort("100.150.151.152:12345")
eng, _ := wgengine.NewFakeUserspaceEngine(logger.Discard, 0)
pm := must.Get(newProfileManager(new(mem.Store), t.Logf))
h.ps = &peerAPIServer{
b: &LocalBackend{
e: eng,
pm: pm,
store: pm.Store(),
// configure as an app connector just to enable the API.
appConnector: appc.NewAppConnector(t.Logf, &appctest.RouteCollector{}),
},
}
eng, _ := wgengine.NewFakeUserspaceEngine(logger.Discard, 0)
pm := must.Get(newProfileManager(new(mem.Store), t.Logf))
var a *appc.AppConnector
if shouldStore {
a = appc.NewAppConnector(t.Logf, &appctest.RouteCollector{}, &appc.RouteInfo{}, fakeStoreRoutes)
} else {
a = appc.NewAppConnector(t.Logf, &appctest.RouteCollector{}, nil, nil)
}
h.ps = &peerAPIServer{
b: &LocalBackend{
e: eng,
pm: pm,
store: pm.Store(),
// configure as an app connector just to enable the API.
appConnector: a,
},
}
h.ps.resolver = &fakeResolver{build: func(b *dnsmessage.Builder) {
b.CNAMEResource(
dnsmessage.ResourceHeader{
Name: dnsmessage.MustNewName("www.example.com."),
Type: dnsmessage.TypeCNAME,
Class: dnsmessage.ClassINET,
TTL: 0,
},
dnsmessage.CNAMEResource{
CNAME: dnsmessage.MustNewName("example.com."),
},
)
b.AResource(
dnsmessage.ResourceHeader{
Name: dnsmessage.MustNewName("example.com."),
Type: dnsmessage.TypeA,
Class: dnsmessage.ClassINET,
TTL: 0,
},
dnsmessage.AResource{
A: [4]byte{192, 0, 0, 8},
},
)
}}
f := filter.NewAllowAllForTest(logger.Discard)
h.ps.b.setFilter(f)
h.ps.resolver = &fakeResolver{build: func(b *dnsmessage.Builder) {
b.CNAMEResource(
dnsmessage.ResourceHeader{
Name: dnsmessage.MustNewName("www.example.com."),
Type: dnsmessage.TypeCNAME,
Class: dnsmessage.ClassINET,
TTL: 0,
},
dnsmessage.CNAMEResource{
CNAME: dnsmessage.MustNewName("example.com."),
},
)
b.AResource(
dnsmessage.ResourceHeader{
Name: dnsmessage.MustNewName("example.com."),
Type: dnsmessage.TypeA,
Class: dnsmessage.ClassINET,
TTL: 0,
},
dnsmessage.AResource{
A: [4]byte{192, 0, 0, 8},
},
)
}}
f := filter.NewAllowAllForTest(logger.Discard)
h.ps.b.setFilter(f)
if !h.replyToDNSQueries() {
t.Errorf("unexpectedly deny; wanted to be a DNS server")
}
if !h.replyToDNSQueries() {
t.Errorf("unexpectedly deny; wanted to be a DNS server")
}
w := httptest.NewRecorder()
h.handleDNSQuery(w, httptest.NewRequest("GET", "/dns-query?q=www.example.com.", nil))
if w.Code != http.StatusOK {
t.Errorf("unexpected status code: %v", w.Code)
}
var addrs []string
json.NewDecoder(w.Body).Decode(&addrs)
if len(addrs) == 0 {
t.Fatalf("no addresses returned")
}
for _, addr := range addrs {
netip.MustParseAddr(addr)
w := httptest.NewRecorder()
h.handleDNSQuery(w, httptest.NewRequest("GET", "/dns-query?q=www.example.com.", nil))
if w.Code != http.StatusOK {
t.Errorf("unexpected status code: %v", w.Code)
}
var addrs []string
json.NewDecoder(w.Body).Decode(&addrs)
if len(addrs) == 0 {
t.Fatalf("no addresses returned")
}
for _, addr := range addrs {
netip.MustParseAddr(addr)
}
}
}
func TestPeerAPIReplyToDNSQueriesAreObserved(t *testing.T) {
ctx := context.Background()
var h peerAPIHandler
h.remoteAddr = netip.MustParseAddrPort("100.150.151.152:12345")
for _, shouldStore := range []bool{false, true} {
ctx := context.Background()
var h peerAPIHandler
h.remoteAddr = netip.MustParseAddrPort("100.150.151.152:12345")
rc := &appctest.RouteCollector{}
eng, _ := wgengine.NewFakeUserspaceEngine(logger.Discard, 0)
pm := must.Get(newProfileManager(new(mem.Store), t.Logf))
h.ps = &peerAPIServer{
b: &LocalBackend{
e: eng,
pm: pm,
store: pm.Store(),
appConnector: appc.NewAppConnector(t.Logf, rc),
},
}
h.ps.b.appConnector.UpdateDomains([]string{"example.com"})
h.ps.b.appConnector.Wait(ctx)
h.ps.resolver = &fakeResolver{build: func(b *dnsmessage.Builder) {
b.AResource(
dnsmessage.ResourceHeader{
Name: dnsmessage.MustNewName("example.com."),
Type: dnsmessage.TypeA,
Class: dnsmessage.ClassINET,
TTL: 0,
rc := &appctest.RouteCollector{}
eng, _ := wgengine.NewFakeUserspaceEngine(logger.Discard, 0)
pm := must.Get(newProfileManager(new(mem.Store), t.Logf))
var a *appc.AppConnector
if shouldStore {
a = appc.NewAppConnector(t.Logf, rc, &appc.RouteInfo{}, fakeStoreRoutes)
} else {
a = appc.NewAppConnector(t.Logf, rc, nil, nil)
}
h.ps = &peerAPIServer{
b: &LocalBackend{
e: eng,
pm: pm,
store: pm.Store(),
appConnector: a,
},
dnsmessage.AResource{
A: [4]byte{192, 0, 0, 8},
},
)
}}
f := filter.NewAllowAllForTest(logger.Discard)
h.ps.b.setFilter(f)
}
h.ps.b.appConnector.UpdateDomains([]string{"example.com"})
h.ps.b.appConnector.Wait(ctx)
if !h.ps.b.OfferingAppConnector() {
t.Fatal("expecting to be offering app connector")
}
if !h.replyToDNSQueries() {
t.Errorf("unexpectedly deny; wanted to be a DNS server")
}
h.ps.resolver = &fakeResolver{build: func(b *dnsmessage.Builder) {
b.AResource(
dnsmessage.ResourceHeader{
Name: dnsmessage.MustNewName("example.com."),
Type: dnsmessage.TypeA,
Class: dnsmessage.ClassINET,
TTL: 0,
},
dnsmessage.AResource{
A: [4]byte{192, 0, 0, 8},
},
)
}}
f := filter.NewAllowAllForTest(logger.Discard)
h.ps.b.setFilter(f)
w := httptest.NewRecorder()
h.handleDNSQuery(w, httptest.NewRequest("GET", "/dns-query?q=example.com.", nil))
if w.Code != http.StatusOK {
t.Errorf("unexpected status code: %v", w.Code)
}
h.ps.b.appConnector.Wait(ctx)
if !h.ps.b.OfferingAppConnector() {
t.Fatal("expecting to be offering app connector")
}
if !h.replyToDNSQueries() {
t.Errorf("unexpectedly deny; wanted to be a DNS server")
}
wantRoutes := []netip.Prefix{netip.MustParsePrefix("192.0.0.8/32")}
if !slices.Equal(rc.Routes(), wantRoutes) {
t.Errorf("got %v; want %v", rc.Routes(), wantRoutes)
w := httptest.NewRecorder()
h.handleDNSQuery(w, httptest.NewRequest("GET", "/dns-query?q=example.com.", nil))
if w.Code != http.StatusOK {
t.Errorf("unexpected status code: %v", w.Code)
}
h.ps.b.appConnector.Wait(ctx)
wantRoutes := []netip.Prefix{netip.MustParsePrefix("192.0.0.8/32")}
if !slices.Equal(rc.Routes(), wantRoutes) {
t.Errorf("got %v; want %v", rc.Routes(), wantRoutes)
}
}
}
func TestPeerAPIReplyToDNSQueriesAreObservedWithCNAMEFlattening(t *testing.T) {
ctx := context.Background()
var h peerAPIHandler
h.remoteAddr = netip.MustParseAddrPort("100.150.151.152:12345")
for _, shouldStore := range []bool{false, true} {
ctx := context.Background()
var h peerAPIHandler
h.remoteAddr = netip.MustParseAddrPort("100.150.151.152:12345")
rc := &appctest.RouteCollector{}
eng, _ := wgengine.NewFakeUserspaceEngine(logger.Discard, 0)
pm := must.Get(newProfileManager(new(mem.Store), t.Logf))
h.ps = &peerAPIServer{
b: &LocalBackend{
e: eng,
pm: pm,
store: pm.Store(),
appConnector: appc.NewAppConnector(t.Logf, rc),
},
}
h.ps.b.appConnector.UpdateDomains([]string{"www.example.com"})
h.ps.b.appConnector.Wait(ctx)
h.ps.resolver = &fakeResolver{build: func(b *dnsmessage.Builder) {
b.CNAMEResource(
dnsmessage.ResourceHeader{
Name: dnsmessage.MustNewName("www.example.com."),
Type: dnsmessage.TypeCNAME,
Class: dnsmessage.ClassINET,
TTL: 0,
rc := &appctest.RouteCollector{}
eng, _ := wgengine.NewFakeUserspaceEngine(logger.Discard, 0)
pm := must.Get(newProfileManager(new(mem.Store), t.Logf))
var a *appc.AppConnector
if shouldStore {
a = appc.NewAppConnector(t.Logf, rc, &appc.RouteInfo{}, fakeStoreRoutes)
} else {
a = appc.NewAppConnector(t.Logf, rc, nil, nil)
}
h.ps = &peerAPIServer{
b: &LocalBackend{
e: eng,
pm: pm,
store: pm.Store(),
appConnector: a,
},
dnsmessage.CNAMEResource{
CNAME: dnsmessage.MustNewName("example.com."),
},
)
b.AResource(
dnsmessage.ResourceHeader{
Name: dnsmessage.MustNewName("example.com."),
Type: dnsmessage.TypeA,
Class: dnsmessage.ClassINET,
TTL: 0,
},
dnsmessage.AResource{
A: [4]byte{192, 0, 0, 8},
},
)
}}
f := filter.NewAllowAllForTest(logger.Discard)
h.ps.b.setFilter(f)
}
h.ps.b.appConnector.UpdateDomains([]string{"www.example.com"})
h.ps.b.appConnector.Wait(ctx)
if !h.ps.b.OfferingAppConnector() {
t.Fatal("expecting to be offering app connector")
}
if !h.replyToDNSQueries() {
t.Errorf("unexpectedly deny; wanted to be a DNS server")
}
h.ps.resolver = &fakeResolver{build: func(b *dnsmessage.Builder) {
b.CNAMEResource(
dnsmessage.ResourceHeader{
Name: dnsmessage.MustNewName("www.example.com."),
Type: dnsmessage.TypeCNAME,
Class: dnsmessage.ClassINET,
TTL: 0,
},
dnsmessage.CNAMEResource{
CNAME: dnsmessage.MustNewName("example.com."),
},
)
b.AResource(
dnsmessage.ResourceHeader{
Name: dnsmessage.MustNewName("example.com."),
Type: dnsmessage.TypeA,
Class: dnsmessage.ClassINET,
TTL: 0,
},
dnsmessage.AResource{
A: [4]byte{192, 0, 0, 8},
},
)
}}
f := filter.NewAllowAllForTest(logger.Discard)
h.ps.b.setFilter(f)
w := httptest.NewRecorder()
h.handleDNSQuery(w, httptest.NewRequest("GET", "/dns-query?q=www.example.com.", nil))
if w.Code != http.StatusOK {
t.Errorf("unexpected status code: %v", w.Code)
}
h.ps.b.appConnector.Wait(ctx)
if !h.ps.b.OfferingAppConnector() {
t.Fatal("expecting to be offering app connector")
}
if !h.replyToDNSQueries() {
t.Errorf("unexpectedly deny; wanted to be a DNS server")
}
wantRoutes := []netip.Prefix{netip.MustParsePrefix("192.0.0.8/32")}
if !slices.Equal(rc.Routes(), wantRoutes) {
t.Errorf("got %v; want %v", rc.Routes(), wantRoutes)
w := httptest.NewRecorder()
h.handleDNSQuery(w, httptest.NewRequest("GET", "/dns-query?q=www.example.com.", nil))
if w.Code != http.StatusOK {
t.Errorf("unexpected status code: %v", w.Code)
}
h.ps.b.appConnector.Wait(ctx)
wantRoutes := []netip.Prefix{netip.MustParsePrefix("192.0.0.8/32")}
if !slices.Equal(rc.Routes(), wantRoutes) {
t.Errorf("got %v; want %v", rc.Routes(), wantRoutes)
}
}
}

3
tailcfg/tailcfg.go
View File

@ -2253,6 +2253,9 @@ const (
// NodeAttrAutoExitNode permits the automatic exit nodes feature.
NodeAttrAutoExitNode NodeCapability = "auto-exit-node"
// NodeAttrStoreAppCRoutes enables storing app connector routes persistently.
NodeAttrStoreAppCRoutes NodeCapability = "store-appc-routes"
)
// SetDNSRequest is a request to add a DNS record.