frp/cmd/frpc/sub/nathole.go

103 lines
2.7 KiB
Go

// Copyright 2023 The frp Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package sub
import (
"fmt"
"net"
"os"
"strconv"
"github.com/spf13/cobra"
"github.com/fatedier/frp/pkg/config"
"github.com/fatedier/frp/pkg/nathole"
)
var (
natHoleSTUNServer string
serverUDPPort int
)
func init() {
RegisterCommonFlags(natholeCmd)
rootCmd.AddCommand(natholeCmd)
natholeCmd.AddCommand(natholeDiscoveryCmd)
natholeCmd.PersistentFlags().StringVarP(&natHoleSTUNServer, "nat_hole_stun_server", "", "stun.easyvoip.com:3478", "STUN server address for nathole")
natholeCmd.PersistentFlags().IntVarP(&serverUDPPort, "server_udp_port", "", 0, "UDP port of frps for nathole")
}
var natholeCmd = &cobra.Command{
Use: "nathole",
Short: "Actions about nathole",
}
var natholeDiscoveryCmd = &cobra.Command{
Use: "discover",
Short: "Discover nathole information by frps and stun server",
RunE: func(cmd *cobra.Command, args []string) error {
// ignore error here, because we can use command line pameters
cfg, _, _, _ := config.ParseClientConfig(cfgFile)
if natHoleSTUNServer != "" {
cfg.NatHoleSTUNServer = natHoleSTUNServer
}
if serverUDPPort != 0 {
cfg.ServerUDPPort = serverUDPPort
}
if err := validateForNatHoleDiscovery(cfg); err != nil {
fmt.Println(err)
os.Exit(1)
}
serverAddr := ""
if cfg.ServerUDPPort != 0 {
serverAddr = net.JoinHostPort(cfg.ServerAddr, strconv.Itoa(cfg.ServerUDPPort))
}
addresses, err := nathole.Discover(
serverAddr,
[]string{cfg.NatHoleSTUNServer},
[]byte(cfg.Token),
)
if err != nil {
fmt.Println("discover error:", err)
os.Exit(1)
}
if len(addresses) < 2 {
fmt.Printf("discover error: can not get enough addresses, need 2, got: %v\n", addresses)
os.Exit(1)
}
natType, behavior, err := nathole.ClassifyNATType(addresses)
if err != nil {
fmt.Println("classify nat type error:", err)
os.Exit(1)
}
fmt.Println("Your NAT type is:", natType)
fmt.Println("Behavior is:", behavior)
fmt.Println("External address is:", addresses)
return nil
},
}
func validateForNatHoleDiscovery(cfg config.ClientCommonConf) error {
if cfg.NatHoleSTUNServer == "" {
return fmt.Errorf("nat_hole_stun_server can not be empty")
}
return nil
}