mirror of
https://github.com/tailscale/tailscale.git
synced 2024-12-12 19:24:40 +00:00
b9adbe2002
In prep for most of the package funcs in net/interfaces to become methods in a long-lived netmon.Monitor that can cache things. (Many of the funcs are very heavy to call regularly, whereas the long-lived netmon.Monitor can subscribe to things from the OS and remember answers to questions it's asked regularly later) Updates tailscale/corp#10910 Updates tailscale/corp#18960 Updates #7967 Updates #3299 Change-Id: Ie4e8dedb70136af2d611b990b865a822cd1797e5 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
404 lines
9.2 KiB
Go
404 lines
9.2 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
|
|
// SPDX-License-Identifier: BSD-3-Clause
|
|
|
|
package netmon
|
|
|
|
import (
|
|
"encoding/json"
|
|
"net"
|
|
"net/netip"
|
|
"testing"
|
|
|
|
"tailscale.com/tstest"
|
|
)
|
|
|
|
func TestGetState(t *testing.T) {
|
|
st, err := GetState()
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
j, err := json.MarshalIndent(st, "", "\t")
|
|
if err != nil {
|
|
t.Errorf("JSON: %v", err)
|
|
}
|
|
t.Logf("Got: %s", j)
|
|
t.Logf("As string: %s", st)
|
|
}
|
|
|
|
func TestLikelyHomeRouterIP(t *testing.T) {
|
|
ipnet := func(s string) net.Addr {
|
|
ip, ipnet, err := net.ParseCIDR(s)
|
|
ipnet.IP = ip
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
return ipnet
|
|
}
|
|
|
|
mockInterfaces := []Interface{
|
|
// Interface that's not running
|
|
{
|
|
Interface: &net.Interface{
|
|
Index: 1,
|
|
MTU: 1500,
|
|
Name: "down0",
|
|
Flags: net.FlagBroadcast | net.FlagMulticast,
|
|
},
|
|
AltAddrs: []net.Addr{
|
|
ipnet("10.0.0.100/8"),
|
|
},
|
|
},
|
|
|
|
// Interface that's up, but only has an IPv6 address
|
|
{
|
|
Interface: &net.Interface{
|
|
Index: 2,
|
|
MTU: 1500,
|
|
Name: "ipsixonly0",
|
|
Flags: net.FlagUp | net.FlagBroadcast | net.FlagMulticast | net.FlagRunning,
|
|
},
|
|
AltAddrs: []net.Addr{
|
|
ipnet("76f9:2e7d:55dd:48e1:48d0:763a:b591:b1bc/64"),
|
|
},
|
|
},
|
|
|
|
// Fake interface with a gateway to the internet
|
|
{
|
|
Interface: &net.Interface{
|
|
Index: 3,
|
|
MTU: 1500,
|
|
Name: "fake0",
|
|
Flags: net.FlagUp | net.FlagBroadcast | net.FlagMulticast | net.FlagRunning,
|
|
},
|
|
AltAddrs: []net.Addr{
|
|
ipnet("23a1:99c9:3a88:1d29:74d4:957b:2133:3f4e/64"),
|
|
ipnet("192.168.7.100/24"),
|
|
},
|
|
},
|
|
}
|
|
|
|
// Mock out the responses from netInterfaces()
|
|
tstest.Replace(t, &altNetInterfaces, func() ([]Interface, error) {
|
|
return mockInterfaces, nil
|
|
})
|
|
|
|
// Mock out the likelyHomeRouterIP to return a known gateway.
|
|
tstest.Replace(t, &likelyHomeRouterIP, func() (netip.Addr, netip.Addr, bool) {
|
|
return netip.MustParseAddr("192.168.7.1"), netip.Addr{}, true
|
|
})
|
|
|
|
gw, my, ok := LikelyHomeRouterIP()
|
|
if !ok {
|
|
t.Fatal("expected success")
|
|
}
|
|
t.Logf("myIP = %v; gw = %v", my, gw)
|
|
|
|
if want := netip.MustParseAddr("192.168.7.1"); gw != want {
|
|
t.Errorf("got gateway %v; want %v", gw, want)
|
|
}
|
|
if want := netip.MustParseAddr("192.168.7.100"); my != want {
|
|
t.Errorf("got self IP %v; want %v", my, want)
|
|
}
|
|
|
|
// Verify that no IP is returned if there are no IPv4 addresses on
|
|
// local interfaces.
|
|
t.Run("NoIPv4Addrs", func(t *testing.T) {
|
|
tstest.Replace(t, &mockInterfaces, []Interface{
|
|
// Interface that's up, but only has an IPv6 address
|
|
{
|
|
Interface: &net.Interface{
|
|
Index: 2,
|
|
MTU: 1500,
|
|
Name: "en0",
|
|
Flags: net.FlagUp | net.FlagBroadcast | net.FlagMulticast | net.FlagRunning,
|
|
},
|
|
AltAddrs: []net.Addr{
|
|
ipnet("76f9:2e7d:55dd:48e1:48d0:763a:b591:b1bc/64"),
|
|
},
|
|
},
|
|
})
|
|
|
|
_, _, ok := LikelyHomeRouterIP()
|
|
if ok {
|
|
t.Fatal("expected no success")
|
|
}
|
|
})
|
|
}
|
|
|
|
// https://github.com/tailscale/tailscale/issues/10466
|
|
func TestLikelyHomeRouterIP_Prefix(t *testing.T) {
|
|
ipnet := func(s string) net.Addr {
|
|
ip, ipnet, err := net.ParseCIDR(s)
|
|
ipnet.IP = ip
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
return ipnet
|
|
}
|
|
|
|
mockInterfaces := []Interface{
|
|
// Valid and running interface that doesn't have a route to the
|
|
// internet, and comes before the interface that does.
|
|
{
|
|
Interface: &net.Interface{
|
|
Index: 1,
|
|
MTU: 1500,
|
|
Name: "docker0",
|
|
Flags: net.FlagUp |
|
|
net.FlagBroadcast |
|
|
net.FlagMulticast |
|
|
net.FlagRunning,
|
|
},
|
|
AltAddrs: []net.Addr{
|
|
ipnet("172.17.0.0/16"),
|
|
},
|
|
},
|
|
|
|
// Fake interface with a gateway to the internet.
|
|
{
|
|
Interface: &net.Interface{
|
|
Index: 2,
|
|
MTU: 1500,
|
|
Name: "fake0",
|
|
Flags: net.FlagUp |
|
|
net.FlagBroadcast |
|
|
net.FlagMulticast |
|
|
net.FlagRunning,
|
|
},
|
|
AltAddrs: []net.Addr{
|
|
ipnet("192.168.7.100/24"),
|
|
},
|
|
},
|
|
}
|
|
|
|
// Mock out the responses from netInterfaces()
|
|
tstest.Replace(t, &altNetInterfaces, func() ([]Interface, error) {
|
|
return mockInterfaces, nil
|
|
})
|
|
|
|
// Mock out the likelyHomeRouterIP to return a known gateway.
|
|
tstest.Replace(t, &likelyHomeRouterIP, func() (netip.Addr, netip.Addr, bool) {
|
|
return netip.MustParseAddr("192.168.7.1"), netip.Addr{}, true
|
|
})
|
|
|
|
gw, my, ok := LikelyHomeRouterIP()
|
|
if !ok {
|
|
t.Fatal("expected success")
|
|
}
|
|
t.Logf("myIP = %v; gw = %v", my, gw)
|
|
|
|
if want := netip.MustParseAddr("192.168.7.1"); gw != want {
|
|
t.Errorf("got gateway %v; want %v", gw, want)
|
|
}
|
|
if want := netip.MustParseAddr("192.168.7.100"); my != want {
|
|
t.Errorf("got self IP %v; want %v", my, want)
|
|
}
|
|
}
|
|
|
|
func TestLikelyHomeRouterIP_NoMocks(t *testing.T) {
|
|
// Verify that this works properly when called on a real live system,
|
|
// without any mocks.
|
|
gw, my, ok := LikelyHomeRouterIP()
|
|
t.Logf("LikelyHomeRouterIP: gw=%v my=%v ok=%v", gw, my, ok)
|
|
}
|
|
|
|
func TestIsUsableV6(t *testing.T) {
|
|
tests := []struct {
|
|
name string
|
|
ip string
|
|
want bool
|
|
}{
|
|
{"first ULA", "fc00::1", true},
|
|
{"Tailscale", "fd7a:115c:a1e0::1", false},
|
|
{"Cloud Run", "fddf:3978:feb1:d745::1", true},
|
|
{"zeros", "0::0", false},
|
|
{"Link Local", "fe80::1", false},
|
|
{"Global", "2602::1", true},
|
|
{"IPv4 public", "192.0.2.1", false},
|
|
{"IPv4 private", "192.168.1.1", false},
|
|
}
|
|
|
|
for _, test := range tests {
|
|
if got := isUsableV6(netip.MustParseAddr(test.ip)); got != test.want {
|
|
t.Errorf("isUsableV6(%s) = %v, want %v", test.name, got, test.want)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestStateString(t *testing.T) {
|
|
tests := []struct {
|
|
name string
|
|
s *State
|
|
want string
|
|
}{
|
|
{
|
|
name: "typical_linux",
|
|
s: &State{
|
|
DefaultRouteInterface: "eth0",
|
|
Interface: map[string]Interface{
|
|
"eth0": {
|
|
Interface: &net.Interface{
|
|
Flags: net.FlagUp,
|
|
},
|
|
},
|
|
"wlan0": {
|
|
Interface: &net.Interface{},
|
|
},
|
|
"lo": {
|
|
Interface: &net.Interface{},
|
|
},
|
|
},
|
|
InterfaceIPs: map[string][]netip.Prefix{
|
|
"eth0": {
|
|
netip.MustParsePrefix("10.0.0.2/8"),
|
|
},
|
|
"lo": {},
|
|
},
|
|
HaveV4: true,
|
|
},
|
|
want: `interfaces.State{defaultRoute=eth0 ifs={eth0:[10.0.0.2/8]} v4=true v6=false}`,
|
|
},
|
|
{
|
|
name: "default_desc",
|
|
s: &State{
|
|
DefaultRouteInterface: "foo",
|
|
Interface: map[string]Interface{
|
|
"foo": {
|
|
Desc: "a foo thing",
|
|
Interface: &net.Interface{
|
|
Flags: net.FlagUp,
|
|
},
|
|
},
|
|
},
|
|
},
|
|
want: `interfaces.State{defaultRoute=foo (a foo thing) ifs={foo:[]} v4=false v6=false}`,
|
|
},
|
|
}
|
|
for _, tt := range tests {
|
|
t.Run(tt.name, func(t *testing.T) {
|
|
got := tt.s.String()
|
|
if got != tt.want {
|
|
t.Errorf("wrong\n got: %s\nwant: %s\n", got, tt.want)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
// tests (*State).Equal
|
|
func TestEqual(t *testing.T) {
|
|
pfxs := func(addrs ...string) (ret []netip.Prefix) {
|
|
for _, addr := range addrs {
|
|
ret = append(ret, netip.MustParsePrefix(addr))
|
|
}
|
|
return ret
|
|
}
|
|
|
|
tests := []struct {
|
|
name string
|
|
s1, s2 *State
|
|
want bool // implies !wantMajor
|
|
}{
|
|
{
|
|
name: "eq_nil",
|
|
want: true,
|
|
},
|
|
{
|
|
name: "nil_mix",
|
|
s2: new(State),
|
|
want: false,
|
|
},
|
|
{
|
|
name: "eq",
|
|
s1: &State{
|
|
DefaultRouteInterface: "foo",
|
|
InterfaceIPs: map[string][]netip.Prefix{
|
|
"foo": {netip.MustParsePrefix("10.0.1.2/16")},
|
|
},
|
|
},
|
|
s2: &State{
|
|
DefaultRouteInterface: "foo",
|
|
InterfaceIPs: map[string][]netip.Prefix{
|
|
"foo": {netip.MustParsePrefix("10.0.1.2/16")},
|
|
},
|
|
},
|
|
want: true,
|
|
},
|
|
{
|
|
name: "default-route-changed",
|
|
s1: &State{
|
|
DefaultRouteInterface: "foo",
|
|
InterfaceIPs: map[string][]netip.Prefix{
|
|
"foo": {netip.MustParsePrefix("10.0.1.2/16")},
|
|
},
|
|
},
|
|
s2: &State{
|
|
DefaultRouteInterface: "bar",
|
|
InterfaceIPs: map[string][]netip.Prefix{
|
|
"foo": {netip.MustParsePrefix("10.0.1.2/16")},
|
|
},
|
|
},
|
|
want: false,
|
|
},
|
|
{
|
|
name: "some-interface-ips-changed",
|
|
s1: &State{
|
|
DefaultRouteInterface: "foo",
|
|
InterfaceIPs: map[string][]netip.Prefix{
|
|
"foo": {netip.MustParsePrefix("10.0.1.2/16")},
|
|
},
|
|
},
|
|
s2: &State{
|
|
DefaultRouteInterface: "foo",
|
|
InterfaceIPs: map[string][]netip.Prefix{
|
|
"foo": {netip.MustParsePrefix("10.0.1.3/16")},
|
|
},
|
|
},
|
|
want: false,
|
|
},
|
|
{
|
|
name: "altaddrs-changed",
|
|
s1: &State{
|
|
Interface: map[string]Interface{
|
|
"foo": {AltAddrs: []net.Addr{&net.TCPAddr{IP: net.ParseIP("1.2.3.4")}}},
|
|
},
|
|
},
|
|
s2: &State{
|
|
Interface: map[string]Interface{
|
|
"foo": {AltAddrs: []net.Addr{&net.TCPAddr{IP: net.ParseIP("5.6.7.8")}}},
|
|
},
|
|
},
|
|
want: false,
|
|
},
|
|
|
|
// See tailscale/corp#19124
|
|
{
|
|
name: "interface-removed",
|
|
s1: &State{
|
|
InterfaceIPs: map[string][]netip.Prefix{
|
|
"rmnet16": pfxs("2607:1111:2222:3333:4444:5555:6666:7777/64"),
|
|
"rmnet17": pfxs("2607:9999:8888:7777:666:5555:4444:3333/64"),
|
|
"tun0": pfxs("100.64.1.2/32", "fd7a:115c:a1e0::1/128"),
|
|
"v4-rmnet16": pfxs("192.0.0.4/32"),
|
|
"wlan0": pfxs("10.0.0.111/24"), // removed below
|
|
},
|
|
},
|
|
s2: &State{
|
|
InterfaceIPs: map[string][]netip.Prefix{
|
|
"rmnet16": pfxs("2607:1111:2222:3333:4444:5555:6666:7777/64"),
|
|
"rmnet17": pfxs("2607:9999:8888:7777:666:5555:4444:3333/64"),
|
|
"tun0": pfxs("100.64.1.2/32", "fd7a:115c:a1e0::1/128"),
|
|
"v4-rmnet16": pfxs("192.0.0.4/32"),
|
|
},
|
|
},
|
|
want: false,
|
|
},
|
|
}
|
|
for _, tt := range tests {
|
|
t.Run(tt.name, func(t *testing.T) {
|
|
if got := tt.s2.Equal(tt.s1); got != tt.want {
|
|
t.Errorf("Equal = %v; want %v", got, tt.want)
|
|
}
|
|
})
|
|
}
|
|
}
|