mirror of
https://github.com/tailscale/tailscale.git
synced 2025-03-29 04:22:24 +00:00
Merge 4cd24de606d2b1668a1e585d5562118909e33bb5 into b3455fa99a5e8d07133d5140017ec7c49f032a07
This commit is contained in:
James 'zofrex' Sanderson
GitHub
commit
5e9b910bc7
248
tsnet/packet_filter_test.go
Normal file
248
tsnet/packet_filter_test.go
Normal file
@ -0,0 +1,248 @@
|
||||
// Copyright (c) Tailscale Inc & AUTHORS
|
||||
// SPDX-License-Identifier: BSD-3-Clause
|
||||
|
||||
package tsnet
|
||||
|
||||
import (
|
||||
"context"
|
||||
"fmt"
|
||||
"net/netip"
|
||||
"testing"
|
||||
"time"
|
||||
|
||||
"tailscale.com/ipn"
|
||||
"tailscale.com/tailcfg"
|
||||
"tailscale.com/types/ipproto"
|
||||
"tailscale.com/types/key"
|
||||
"tailscale.com/types/netmap"
|
||||
"tailscale.com/util/must"
|
||||
"tailscale.com/wgengine/filter"
|
||||
)
|
||||
|
||||
// waitFor blocks until a NetMap is seen on the IPN bus that satisfies the given
|
||||
// function f. Note: has no timeout, should be called with a ctx that has an
|
||||
// appropriate timeout set.
|
||||
func waitFor(t testing.TB, ctx context.Context, s *Server, f func(*netmap.NetworkMap) bool) error {
|
||||
t.Helper()
|
||||
watcher, err := s.localClient.WatchIPNBus(ctx, ipn.NotifyInitialNetMap)
|
||||
if err != nil {
|
||||
t.Fatalf("error watching IPN bus: %s", err)
|
||||
}
|
||||
defer watcher.Close()
|
||||
|
||||
for {
|
||||
n, err := watcher.Next()
|
||||
if err != nil {
|
||||
return fmt.Errorf("getting next ipn.Notify from IPN bus: %w", err)
|
||||
}
|
||||
if n.NetMap != nil {
|
||||
if f(n.NetMap) {
|
||||
return nil
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// TestPacketFilterFromNetmap tests all of the client code for processing
|
||||
// netmaps and turning them into packet filters together. Only the control-plane
|
||||
// side is mocked out.
|
||||
func TestPacketFilterFromNetmap(t *testing.T) {
|
||||
t.Parallel()
|
||||
|
||||
var key key.NodePublic
|
||||
must.Do(key.UnmarshalText([]byte("nodekey:5c8f86d5fc70d924e55f02446165a5dae8f822994ad26bcf4b08fd841f9bf261")))
|
||||
|
||||
type check struct {
|
||||
src string
|
||||
dst string
|
||||
port uint16
|
||||
want filter.Response
|
||||
}
|
||||
|
||||
tests := []struct {
|
||||
name string
|
||||
mapResponse *tailcfg.MapResponse
|
||||
waitTest func(*netmap.NetworkMap) bool
|
||||
|
||||
incrementalMapResponse *tailcfg.MapResponse // optional
|
||||
incrementalWaitTest func(*netmap.NetworkMap) bool // optional
|
||||
|
||||
checks []check
|
||||
}{
|
||||
{
|
||||
name: "IP_based_peers",
|
||||
mapResponse: &tailcfg.MapResponse{
|
||||
Node: &tailcfg.Node{
|
||||
Addresses: []netip.Prefix{netip.MustParsePrefix("1.1.1.1/32")},
|
||||
},
|
||||
Peers: []*tailcfg.Node{{
|
||||
ID: 2,
|
||||
Name: "foo",
|
||||
Key: key,
|
||||
Addresses: []netip.Prefix{netip.MustParsePrefix("2.2.2.2/32")},
|
||||
CapMap: nil,
|
||||
}},
|
||||
PacketFilter: []tailcfg.FilterRule{{
|
||||
SrcIPs: []string{"2.2.2.2/32"},
|
||||
DstPorts: []tailcfg.NetPortRange{{
|
||||
IP: "1.1.1.1/32",
|
||||
Ports: tailcfg.PortRange{
|
||||
First: 22,
|
||||
Last: 22,
|
||||
},
|
||||
}},
|
||||
IPProto: []int{int(ipproto.TCP)},
|
||||
}},
|
||||
},
|
||||
waitTest: func(nm *netmap.NetworkMap) bool {
|
||||
return len(nm.Peers) > 0
|
||||
},
|
||||
checks: []check{
|
||||
{src: "2.2.2.2", dst: "1.1.1.1", port: 22, want: filter.Accept},
|
||||
{src: "2.2.2.2", dst: "1.1.1.1", port: 23, want: filter.Drop}, // different port
|
||||
{src: "3.3.3.3", dst: "1.1.1.1", port: 22, want: filter.Drop}, // different src
|
||||
{src: "2.2.2.2", dst: "1.1.1.2", port: 22, want: filter.Drop}, // different dst
|
||||
},
|
||||
},
|
||||
{
|
||||
name: "capmap_based_peers",
|
||||
mapResponse: &tailcfg.MapResponse{
|
||||
Node: &tailcfg.Node{
|
||||
Addresses: []netip.Prefix{netip.MustParsePrefix("1.1.1.1/32")},
|
||||
},
|
||||
Peers: []*tailcfg.Node{{
|
||||
ID: 2,
|
||||
Name: "foo",
|
||||
Key: key,
|
||||
Addresses: []netip.Prefix{netip.MustParsePrefix("2.2.2.2/32")},
|
||||
CapMap: tailcfg.NodeCapMap{"X": nil},
|
||||
}},
|
||||
PacketFilter: []tailcfg.FilterRule{{
|
||||
SrcIPs: []string{"cap:X"},
|
||||
DstPorts: []tailcfg.NetPortRange{{
|
||||
IP: "1.1.1.1/32",
|
||||
Ports: tailcfg.PortRange{
|
||||
First: 22,
|
||||
Last: 22,
|
||||
},
|
||||
}},
|
||||
IPProto: []int{int(ipproto.TCP)},
|
||||
}},
|
||||
},
|
||||
waitTest: func(nm *netmap.NetworkMap) bool {
|
||||
return len(nm.Peers) > 0
|
||||
},
|
||||
checks: []check{
|
||||
{src: "2.2.2.2", dst: "1.1.1.1", port: 22, want: filter.Accept},
|
||||
{src: "2.2.2.2", dst: "1.1.1.1", port: 23, want: filter.Drop}, // different port
|
||||
{src: "3.3.3.3", dst: "1.1.1.1", port: 22, want: filter.Drop}, // different src
|
||||
{src: "2.2.2.2", dst: "1.1.1.2", port: 22, want: filter.Drop}, // different dst
|
||||
},
|
||||
},
|
||||
{
|
||||
name: "capmap_based_peers_changed",
|
||||
mapResponse: &tailcfg.MapResponse{
|
||||
Node: &tailcfg.Node{
|
||||
Addresses: []netip.Prefix{netip.MustParsePrefix("1.1.1.1/32")},
|
||||
CapMap: tailcfg.NodeCapMap{"X-sigil": nil},
|
||||
},
|
||||
PacketFilter: []tailcfg.FilterRule{{
|
||||
SrcIPs: []string{"cap:label-1"},
|
||||
DstPorts: []tailcfg.NetPortRange{{
|
||||
IP: "1.1.1.1/32",
|
||||
Ports: tailcfg.PortRange{
|
||||
First: 22,
|
||||
Last: 22,
|
||||
},
|
||||
}},
|
||||
IPProto: []int{int(ipproto.TCP)},
|
||||
}},
|
||||
},
|
||||
waitTest: func(nm *netmap.NetworkMap) bool {
|
||||
return nm.SelfNode.HasCap("X-sigil")
|
||||
},
|
||||
incrementalMapResponse: &tailcfg.MapResponse{
|
||||
PeersChanged: []*tailcfg.Node{{
|
||||
ID: 2,
|
||||
Name: "foo",
|
||||
Key: key,
|
||||
Addresses: []netip.Prefix{netip.MustParsePrefix("2.2.2.2/32")},
|
||||
CapMap: tailcfg.NodeCapMap{"label-1": nil},
|
||||
}},
|
||||
},
|
||||
incrementalWaitTest: func(nm *netmap.NetworkMap) bool {
|
||||
return len(nm.Peers) > 0
|
||||
},
|
||||
checks: []check{
|
||||
{src: "2.2.2.2", dst: "1.1.1.1", port: 22, want: filter.Accept},
|
||||
{src: "2.2.2.2", dst: "1.1.1.1", port: 23, want: filter.Drop}, // different port
|
||||
{src: "3.3.3.3", dst: "1.1.1.1", port: 22, want: filter.Drop}, // different src
|
||||
{src: "2.2.2.2", dst: "1.1.1.2", port: 22, want: filter.Drop}, // different dst
|
||||
},
|
||||
},
|
||||
}
|
||||
for _, test := range tests {
|
||||
t.Run(test.name, func(t *testing.T) {
|
||||
t.Parallel()
|
||||
ctx, cancel := context.WithTimeout(t.Context(), 30*time.Second)
|
||||
defer cancel()
|
||||
|
||||
controlURL, c := startControl(t)
|
||||
s, _, pubKey := startServer(t, ctx, controlURL, "node")
|
||||
|
||||
if test.waitTest(s.lb.NetMap()) {
|
||||
t.Fatal("waitTest already passes before sending initial netmap: this will be flaky")
|
||||
}
|
||||
|
||||
if !c.AddRawMapResponse(pubKey, test.mapResponse) {
|
||||
t.Fatalf("could not send map response to %s", pubKey)
|
||||
}
|
||||
|
||||
if err := waitFor(t, ctx, s, test.waitTest); err != nil {
|
||||
t.Fatalf("waitFor: %s", err)
|
||||
}
|
||||
|
||||
pf := s.lb.GetFilterForTest()
|
||||
|
||||
for _, check := range test.checks {
|
||||
got := pf.Check(netip.MustParseAddr(check.src), netip.MustParseAddr(check.dst), check.port, ipproto.TCP)
|
||||
|
||||
want := check.want
|
||||
if test.incrementalMapResponse != nil {
|
||||
want = filter.Drop
|
||||
}
|
||||
if got != want {
|
||||
t.Errorf("check %s -> %s:%d, got: %s, want: %s", check.src, check.dst, check.port, got, want)
|
||||
}
|
||||
}
|
||||
|
||||
if test.incrementalMapResponse != nil {
|
||||
if test.incrementalWaitTest == nil {
|
||||
t.Fatal("incrementalWaitTest must be set if incrementalMapResponse is set")
|
||||
}
|
||||
|
||||
if test.incrementalWaitTest(s.lb.NetMap()) {
|
||||
t.Fatal("incrementalWaitTest already passes before sending incremental netmap: this will be flaky")
|
||||
}
|
||||
|
||||
if !c.AddRawMapResponse(pubKey, test.incrementalMapResponse) {
|
||||
t.Fatalf("could not send map response to %s", pubKey)
|
||||
}
|
||||
|
||||
if err := waitFor(t, ctx, s, test.incrementalWaitTest); err != nil {
|
||||
t.Fatalf("waitFor: %s", err)
|
||||
}
|
||||
|
||||
pf := s.lb.GetFilterForTest()
|
||||
|
||||
for _, check := range test.checks {
|
||||
got := pf.Check(netip.MustParseAddr(check.src), netip.MustParseAddr(check.dst), check.port, ipproto.TCP)
|
||||
if got != check.want {
|
||||
t.Errorf("check %s -> %s:%d, got: %s, want: %s", check.src, check.dst, check.port, got, check.want)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
})
|
||||
}
|
||||
}
|
||||
Loading…
x
Reference in New Issue
Block a user