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Feature/exit nodes - Windows and macOS support (#1726)

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This commit is contained in:
Viktor Liu
2024-04-03 11:11:46 +02:00
committed by GitHub
parent 9af532fe71
commit 7938295190
41 changed files with 2254 additions and 965 deletions
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242
client/internal/routemanager/systemops_nonlinux_test.go
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@@ -1,16 +1,250 @@
//go:build !linux || android
//go:build !linux && !ios
package routemanager
import (
"bytes"
"fmt"
"net"
"net/netip"
"os"
"strings"
"testing"
"github.com/pion/transport/v3/stdnet"
log "github.com/sirupsen/logrus"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
"github.com/netbirdio/netbird/iface"
)
func assertWGOutInterface(t *testing.T, prefix netip.Prefix, wgIface *iface.WGIface, invert bool) {
t.Helper()
prefixGateway, _, err := getNextHop(prefix.Addr())
require.NoError(t, err, "getNextHop should not return err")
if invert {
assert.NotEqual(t, wgIface.Address().IP.String(), prefixGateway.String(), "route should not point to wireguard interface IP")
} else {
assert.Equal(t, wgIface.Address().IP.String(), prefixGateway.String(), "route should point to wireguard interface IP")
}
}
func TestAddRemoveRoutes(t *testing.T) {
testCases := []struct {
name string
prefix netip.Prefix
shouldRouteToWireguard bool
shouldBeRemoved bool
}{
{
name: "Should Add And Remove Route 100.66.120.0/24",
prefix: netip.MustParsePrefix("100.66.120.0/24"),
shouldRouteToWireguard: true,
shouldBeRemoved: true,
},
{
name: "Should Not Add Or Remove Route 127.0.0.1/32",
prefix: netip.MustParsePrefix("127.0.0.1/32"),
shouldRouteToWireguard: false,
shouldBeRemoved: false,
},
}
for n, testCase := range testCases {
t.Run(testCase.name, func(t *testing.T) {
peerPrivateKey, _ := wgtypes.GeneratePrivateKey()
newNet, err := stdnet.NewNet()
if err != nil {
t.Fatal(err)
}
wgInterface, err := iface.NewWGIFace(fmt.Sprintf("utun53%d", n), "100.65.75.2/24", 33100, peerPrivateKey.String(), iface.DefaultMTU, newNet, nil)
require.NoError(t, err, "should create testing WGIface interface")
defer wgInterface.Close()
err = wgInterface.Create()
require.NoError(t, err, "should create testing wireguard interface")
_, _, err = setupRouting(nil, nil)
require.NoError(t, err)
t.Cleanup(func() {
assert.NoError(t, cleanupRouting())
})
err = addVPNRoute(testCase.prefix, wgInterface.Name())
require.NoError(t, err, "addVPNRoute should not return err")
if testCase.shouldRouteToWireguard {
assertWGOutInterface(t, testCase.prefix, wgInterface, false)
} else {
assertWGOutInterface(t, testCase.prefix, wgInterface, true)
}
exists, err := existsInRouteTable(testCase.prefix)
require.NoError(t, err, "existsInRouteTable should not return err")
if exists && testCase.shouldRouteToWireguard {
err = removeVPNRoute(testCase.prefix, wgInterface.Name())
require.NoError(t, err, "removeVPNRoute should not return err")
prefixGateway, _, err := getNextHop(testCase.prefix.Addr())
require.NoError(t, err, "getNextHop should not return err")
internetGateway, _, err := getNextHop(netip.MustParseAddr("0.0.0.0"))
require.NoError(t, err)
if testCase.shouldBeRemoved {
require.Equal(t, internetGateway, prefixGateway, "route should be pointing to default internet gateway")
} else {
require.NotEqual(t, internetGateway, prefixGateway, "route should be pointing to a different gateway than the internet gateway")
}
}
})
}
}
func TestGetNextHop(t *testing.T) {
gateway, _, err := getNextHop(netip.MustParseAddr("0.0.0.0"))
if err != nil {
t.Fatal("shouldn't return error when fetching the gateway: ", err)
}
if !gateway.IsValid() {
t.Fatal("should return a gateway")
}
addresses, err := net.InterfaceAddrs()
if err != nil {
t.Fatal("shouldn't return error when fetching interface addresses: ", err)
}
var testingIP string
var testingPrefix netip.Prefix
for _, address := range addresses {
if address.Network() != "ip+net" {
continue
}
prefix := netip.MustParsePrefix(address.String())
if !prefix.Addr().IsLoopback() && prefix.Addr().Is4() {
testingIP = prefix.Addr().String()
testingPrefix = prefix.Masked()
break
}
}
localIP, _, err := getNextHop(testingPrefix.Addr())
if err != nil {
t.Fatal("shouldn't return error: ", err)
}
if !localIP.IsValid() {
t.Fatal("should return a gateway for local network")
}
if localIP.String() == gateway.String() {
t.Fatal("local ip should not match with gateway IP")
}
if localIP.String() != testingIP {
t.Fatalf("local ip should match with testing IP: want %s got %s", testingIP, localIP.String())
}
}
func TestAddExistAndRemoveRouteNonAndroid(t *testing.T) {
defaultGateway, _, err := getNextHop(netip.MustParseAddr("0.0.0.0"))
t.Log("defaultGateway: ", defaultGateway)
if err != nil {
t.Fatal("shouldn't return error when fetching the gateway: ", err)
}
testCases := []struct {
name string
prefix netip.Prefix
preExistingPrefix netip.Prefix
shouldAddRoute bool
}{
{
name: "Should Add And Remove random Route",
prefix: netip.MustParsePrefix("99.99.99.99/32"),
shouldAddRoute: true,
},
{
name: "Should Not Add Route if overlaps with default gateway",
prefix: netip.MustParsePrefix(defaultGateway.String() + "/31"),
shouldAddRoute: false,
},
{
name: "Should Add Route if bigger network exists",
prefix: netip.MustParsePrefix("100.100.100.0/24"),
preExistingPrefix: netip.MustParsePrefix("100.100.0.0/16"),
shouldAddRoute: true,
},
{
name: "Should Add Route if smaller network exists",
prefix: netip.MustParsePrefix("100.100.0.0/16"),
preExistingPrefix: netip.MustParsePrefix("100.100.100.0/24"),
shouldAddRoute: true,
},
{
name: "Should Not Add Route if same network exists",
prefix: netip.MustParsePrefix("100.100.0.0/16"),
preExistingPrefix: netip.MustParsePrefix("100.100.0.0/16"),
shouldAddRoute: false,
},
}
for n, testCase := range testCases {
var buf bytes.Buffer
log.SetOutput(&buf)
defer func() {
log.SetOutput(os.Stderr)
}()
t.Run(testCase.name, func(t *testing.T) {
peerPrivateKey, _ := wgtypes.GeneratePrivateKey()
newNet, err := stdnet.NewNet()
if err != nil {
t.Fatal(err)
}
wgInterface, err := iface.NewWGIFace(fmt.Sprintf("utun53%d", n), "100.65.75.2/24", 33100, peerPrivateKey.String(), iface.DefaultMTU, newNet, nil)
require.NoError(t, err, "should create testing WGIface interface")
defer wgInterface.Close()
err = wgInterface.Create()
require.NoError(t, err, "should create testing wireguard interface")
_, _, err = setupRouting(nil, nil)
require.NoError(t, err)
t.Cleanup(func() {
assert.NoError(t, cleanupRouting())
})
// Prepare the environment
if testCase.preExistingPrefix.IsValid() {
err := addVPNRoute(testCase.preExistingPrefix, wgInterface.Name())
require.NoError(t, err, "should not return err when adding pre-existing route")
}
// Add the route
err = addVPNRoute(testCase.prefix, wgInterface.Name())
require.NoError(t, err, "should not return err when adding route")
if testCase.shouldAddRoute {
// test if route exists after adding
ok, err := existsInRouteTable(testCase.prefix)
require.NoError(t, err, "should not return err")
require.True(t, ok, "route should exist")
// remove route again if added
err = removeVPNRoute(testCase.prefix, wgInterface.Name())
require.NoError(t, err, "should not return err")
}
// route should either not have been added or should have been removed
// In case of already existing route, it should not have been added (but still exist)
ok, err := existsInRouteTable(testCase.prefix)
t.Log("Buffer string: ", buf.String())
require.NoError(t, err, "should not return err")
if !strings.Contains(buf.String(), "because it already exists") {
require.False(t, ok, "route should not exist")
}
})
}
}
func TestIsSubRange(t *testing.T) {
addresses, err := net.InterfaceAddrs()
if err != nil {
@@ -50,7 +284,8 @@ func TestIsSubRange(t *testing.T) {
}
func TestExistsInRouteTable(t *testing.T) {
require.NoError(t, setupRouting())
_, _, err := setupRouting(nil, nil)
require.NoError(t, err)
t.Cleanup(func() {
assert.NoError(t, cleanupRouting())
})
@@ -63,7 +298,8 @@ func TestExistsInRouteTable(t *testing.T) {
var addressPrefixes []netip.Prefix
for _, address := range addresses {
p := netip.MustParsePrefix(address.String())
if p.Addr().Is4() {
// Windows sometimes has hidden interface link local addrs that don't turn up on any interface
if p.Addr().Is4() && !p.Addr().IsLinkLocalUnicast() {
addressPrefixes = append(addressPrefixes, p.Masked())
}
}