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tailscale/ipn/ipnlocal/local_test.go

294 lines
6.3 KiB
Go

// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package ipnlocal
import (
"reflect"
"testing"
"inet.af/netaddr"
"tailscale.com/net/interfaces"
"tailscale.com/net/tsaddr"
"tailscale.com/tailcfg"
"tailscale.com/types/netmap"
"tailscale.com/wgengine/wgcfg"
)
func TestNetworkMapCompare(t *testing.T) {
prefix1, err := netaddr.ParseIPPrefix("192.168.0.0/24")
if err != nil {
t.Fatal(err)
}
node1 := &tailcfg.Node{Addresses: []netaddr.IPPrefix{prefix1}}
prefix2, err := netaddr.ParseIPPrefix("10.0.0.0/8")
if err != nil {
t.Fatal(err)
}
node2 := &tailcfg.Node{Addresses: []netaddr.IPPrefix{prefix2}}
tests := []struct {
name string
a, b *netmap.NetworkMap
want bool
}{
{
"both nil",
nil,
nil,
true,
},
{
"b nil",
&netmap.NetworkMap{},
nil,
false,
},
{
"a nil",
nil,
&netmap.NetworkMap{},
false,
},
{
"both default",
&netmap.NetworkMap{},
&netmap.NetworkMap{},
true,
},
{
"names identical",
&netmap.NetworkMap{Name: "map1"},
&netmap.NetworkMap{Name: "map1"},
true,
},
{
"names differ",
&netmap.NetworkMap{Name: "map1"},
&netmap.NetworkMap{Name: "map2"},
false,
},
{
"Peers identical",
&netmap.NetworkMap{Peers: []*tailcfg.Node{}},
&netmap.NetworkMap{Peers: []*tailcfg.Node{}},
true,
},
{
"Peer list length",
// length of Peers list differs
&netmap.NetworkMap{Peers: []*tailcfg.Node{{}}},
&netmap.NetworkMap{Peers: []*tailcfg.Node{}},
false,
},
{
"Node names identical",
&netmap.NetworkMap{Peers: []*tailcfg.Node{&tailcfg.Node{Name: "A"}}},
&netmap.NetworkMap{Peers: []*tailcfg.Node{&tailcfg.Node{Name: "A"}}},
true,
},
{
"Node names differ",
&netmap.NetworkMap{Peers: []*tailcfg.Node{&tailcfg.Node{Name: "A"}}},
&netmap.NetworkMap{Peers: []*tailcfg.Node{&tailcfg.Node{Name: "B"}}},
false,
},
{
"Node lists identical",
&netmap.NetworkMap{Peers: []*tailcfg.Node{node1, node1}},
&netmap.NetworkMap{Peers: []*tailcfg.Node{node1, node1}},
true,
},
{
"Node lists differ",
&netmap.NetworkMap{Peers: []*tailcfg.Node{node1, node1}},
&netmap.NetworkMap{Peers: []*tailcfg.Node{node1, node2}},
false,
},
{
"Node Users differ",
// User field is not checked.
&netmap.NetworkMap{Peers: []*tailcfg.Node{&tailcfg.Node{User: 0}}},
&netmap.NetworkMap{Peers: []*tailcfg.Node{&tailcfg.Node{User: 1}}},
true,
},
}
for _, tt := range tests {
got := dnsMapsEqual(tt.a, tt.b)
if got != tt.want {
t.Errorf("%s: Equal = %v; want %v", tt.name, got, tt.want)
}
}
}
func inRemove(ip netaddr.IP) bool {
for _, pfx := range removeFromDefaultRoute {
if pfx.Contains(ip) {
return true
}
}
return false
}
func TestShrinkDefaultRoute(t *testing.T) {
tests := []struct {
route string
in []string
out []string
localIPFn func(netaddr.IP) bool // true if this machine's local IP address should be "in" after shrinking.
}{
{
route: "0.0.0.0/0",
in: []string{"1.2.3.4", "25.0.0.1"},
out: []string{
"10.0.0.1",
"10.255.255.255",
"192.168.0.1",
"192.168.255.255",
"172.16.0.1",
"172.31.255.255",
"100.101.102.103",
"224.0.0.1",
"169.254.169.254",
// Some random IPv6 stuff that shouldn't be in a v4
// default route.
"fe80::",
"2601::1",
},
localIPFn: func(ip netaddr.IP) bool { return !inRemove(ip) && ip.Is4() },
},
{
route: "::/0",
in: []string{"::1", "2601::1"},
out: []string{
"fe80::1",
"ff00::1",
tsaddr.TailscaleULARange().IP.String(),
},
localIPFn: func(ip netaddr.IP) bool { return !inRemove(ip) && ip.Is6() },
},
}
for _, test := range tests {
def := netaddr.MustParseIPPrefix(test.route)
got, err := shrinkDefaultRoute(def)
if err != nil {
t.Fatalf("shrinkDefaultRoute(%q): %v", test.route, err)
}
for _, ip := range test.in {
if !got.Contains(netaddr.MustParseIP(ip)) {
t.Errorf("shrink(%q).Contains(%v) = false, want true", test.route, ip)
}
}
for _, ip := range test.out {
if got.Contains(netaddr.MustParseIP(ip)) {
t.Errorf("shrink(%q).Contains(%v) = true, want false", test.route, ip)
}
}
ips, _, err := interfaces.LocalAddresses()
if err != nil {
t.Fatal(err)
}
for _, ip := range ips {
want := test.localIPFn(ip)
if gotContains := got.Contains(ip); gotContains != want {
t.Errorf("shrink(%q).Contains(%v) = %v, want %v", test.route, ip, gotContains, want)
}
}
}
}
func TestPeerRoutes(t *testing.T) {
pp := netaddr.MustParseIPPrefix
tests := []struct {
name string
peers []wgcfg.Peer
want []netaddr.IPPrefix
}{
{
name: "small_v4",
peers: []wgcfg.Peer{
{
AllowedIPs: []netaddr.IPPrefix{
pp("100.101.102.103/32"),
},
},
},
want: []netaddr.IPPrefix{
pp("100.101.102.103/32"),
},
},
{
name: "big_v4",
peers: []wgcfg.Peer{
{
AllowedIPs: []netaddr.IPPrefix{
pp("100.101.102.103/32"),
pp("100.101.102.104/32"),
pp("100.101.102.105/32"),
},
},
},
want: []netaddr.IPPrefix{
pp("100.64.0.0/10"),
},
},
{
name: "has_1_v6",
peers: []wgcfg.Peer{
{
AllowedIPs: []netaddr.IPPrefix{
pp("fd7a:115c:a1e0:ab12:4843:cd96:6258:b240/128"),
},
},
},
want: []netaddr.IPPrefix{
pp("fd7a:115c:a1e0::/48"),
},
},
{
name: "has_2_v6",
peers: []wgcfg.Peer{
{
AllowedIPs: []netaddr.IPPrefix{
pp("fd7a:115c:a1e0:ab12:4843:cd96:6258:b240/128"),
pp("fd7a:115c:a1e0:ab12:4843:cd96:6258:b241/128"),
},
},
},
want: []netaddr.IPPrefix{
pp("fd7a:115c:a1e0::/48"),
},
},
{
name: "big_v4_big_v6",
peers: []wgcfg.Peer{
{
AllowedIPs: []netaddr.IPPrefix{
pp("100.101.102.103/32"),
pp("100.101.102.104/32"),
pp("100.101.102.105/32"),
pp("fd7a:115c:a1e0:ab12:4843:cd96:6258:b240/128"),
pp("fd7a:115c:a1e0:ab12:4843:cd96:6258:b241/128"),
},
},
},
want: []netaddr.IPPrefix{
pp("fd7a:115c:a1e0::/48"),
pp("100.64.0.0/10"),
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := peerRoutes(tt.peers, 2)
if !reflect.DeepEqual(got, tt.want) {
t.Errorf("got = %v; want %v", got, tt.want)
}
})
}
}