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cli: set MTU in wg-quick conf

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Thomas Tendyck 2022-03-31 16:40:59 +02:00 committed by Thomas Tendyck
parent 935b2a4490
commit c0105a59aa
5 changed files with 20 additions and 12 deletions
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14
cli/cmd/constants.go
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@ -1,13 +1,17 @@
package cmd package cmd
// wireguardKeyLength is the length of a WireGuard key in byte. const (
const wireguardKeyLength = 32 // wireguardAdminMTU is the MTU designated for the admin's WireGuard interface.
//
// WireGuard doesn't support Path MTU Discovery. Thus, its default MTU can be too high on some networks.
wireguardAdminMTU = 1300
// masterSecretLengthDefault is the default length in bytes for CLI generated master secrets. // masterSecretLengthDefault is the default length in bytes for CLI generated master secrets.
const masterSecretLengthDefault = 32 masterSecretLengthDefault = 32
// masterSecretLengthMin is the minimal length in bytes for user provided master secrets. // masterSecretLengthMin is the minimal length in bytes for user provided master secrets.
const masterSecretLengthMin = 16 masterSecretLengthMin = 16
// constellationNameLength is the maximum length of a Constellation's name. // constellationNameLength is the maximum length of a Constellation's name.
const constellationNameLength = 37 constellationNameLength = 37
)

2
cli/cmd/init.go
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@ -217,7 +217,7 @@ func (r activationResult) writeWGQuickFile(fileHandler file.Handler, config *con
if err != nil { if err != nil {
return fmt.Errorf("create wg config: %w", err) return fmt.Errorf("create wg config: %w", err)
} }
data, err := vpn.NewWGQuickConfig(wgConf, r.clientVpnIP) data, err := vpn.NewWGQuickConfig(wgConf, r.clientVpnIP, wireguardAdminMTU)
if err != nil { if err != nil {
return fmt.Errorf("create wg-quick config: %w", err) return fmt.Errorf("create wg-quick config: %w", err)
} }

3
cli/cmd/init_test.go
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@ -5,6 +5,7 @@ import (
"context" "context"
"encoding/base64" "encoding/base64"
"errors" "errors"
"fmt"
"strconv" "strconv"
"strings" "strings"
"testing" "testing"
@ -728,7 +729,7 @@ func TestWriteWGQuickFile(t *testing.T) {
assert.NoError(err) assert.NoError(err)
file, err := tc.fileHandler.Read(*tc.config.WGQuickConfigPath) file, err := tc.fileHandler.Read(*tc.config.WGQuickConfigPath)
assert.NoError(err) assert.NoError(err)
assert.NotEmpty(file) assert.Contains(string(file), fmt.Sprint("MTU = ", wireguardAdminMTU))
} }
}) })
} }

3
cli/vpn/vpn.go
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@ -148,7 +148,7 @@ func NewConfig(coordinatorPubKey, coordinatorPubIP, clientPrivKey string) (wgtyp
} }
// NewWGQuickConfig create a new WireGuard wg-quick configuration file and mashals it to bytes. // NewWGQuickConfig create a new WireGuard wg-quick configuration file and mashals it to bytes.
func NewWGQuickConfig(config wgtypes.Config, clientVPNIP string) ([]byte, error) { func NewWGQuickConfig(config wgtypes.Config, clientVPNIP string, mtu int) ([]byte, error) {
clientIP := net.ParseIP(clientVPNIP) clientIP := net.ParseIP(clientVPNIP)
if clientIP == nil { if clientIP == nil {
return nil, fmt.Errorf("invalid client vpn ip '%s'", clientVPNIP) return nil, fmt.Errorf("invalid client vpn ip '%s'", clientVPNIP)
@ -156,6 +156,7 @@ func NewWGQuickConfig(config wgtypes.Config, clientVPNIP string) ([]byte, error)
quickfile := wgquick.Config{ quickfile := wgquick.Config{
Config: config, Config: config,
Address: []net.IPNet{{IP: clientIP, Mask: []byte{255, 255, 0, 0}}}, Address: []net.IPNet{{IP: clientIP, Mask: []byte{255, 255, 0, 0}}},
MTU: mtu,
} }
data, err := quickfile.MarshalText() data, err := quickfile.MarshalText()
if err != nil { if err != nil {

4
cli/vpn/vpn_test.go
View File

@ -192,7 +192,8 @@ func TestNewWGQuickConfig(t *testing.T) {
t.Run(name, func(t *testing.T) { t.Run(name, func(t *testing.T) {
assert := assert.New(t) assert := assert.New(t)
quickFile, err := NewWGQuickConfig(tc.config, tc.clientVPNIP) const mtu = 2
quickFile, err := NewWGQuickConfig(tc.config, tc.clientVPNIP, mtu)
if tc.wantErr { if tc.wantErr {
assert.Error(err) assert.Error(err)
@ -202,6 +203,7 @@ func TestNewWGQuickConfig(t *testing.T) {
assert.NoError(quickConfig.UnmarshalText(quickFile)) assert.NoError(quickConfig.UnmarshalText(quickFile))
assert.Equal(tc.config.PrivateKey, quickConfig.PrivateKey) assert.Equal(tc.config.PrivateKey, quickConfig.PrivateKey)
assert.Equal(tc.clientVPNIP, quickConfig.Address[0].IP.String()) assert.Equal(tc.clientVPNIP, quickConfig.Address[0].IP.String())
assert.Equal(mtu, quickConfig.MTU)
} }
}) })
} }