mirror of
https://github.com/fatedier/frp.git
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115 lines
2.9 KiB
Go
115 lines
2.9 KiB
Go
// Copyright 2025 The frp Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"flag"
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"fmt"
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"net"
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"os"
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"os/signal"
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"syscall"
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v1 "github.com/fatedier/frp/pkg/config/v1"
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"github.com/fatedier/frp/pkg/vnet"
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)
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func main() {
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// Parse command-line flags
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listenAddr := flag.String("listen", ":8000", "Server listen address (ip:port)")
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serverTUNAddr := flag.String("tun", "10.20.0.1/24", "Server TUN device address")
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flag.Parse()
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// Listen for incoming connections
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listener, err := net.Listen("tcp", *listenAddr)
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if err != nil {
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fmt.Printf("Failed to listen on %s: %v\n", *listenAddr, err)
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return
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}
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defer listener.Close()
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fmt.Printf("Server listening on %s\n", *listenAddr)
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fmt.Printf("Server TUN address: %s\n", *serverTUNAddr)
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// Set up vnet controller on the server
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serverCfg := v1.VirtualNetConfig{
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Address: *serverTUNAddr, // Server TUN device address
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}
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serverController := vnet.NewController(serverCfg)
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if err := serverController.Init(); err != nil {
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fmt.Printf("Server init error: %v\n", err)
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return
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}
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// Start the controller
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go func() {
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if err := serverController.Run(); err != nil {
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fmt.Printf("Server run error: %v\n", err)
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}
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}()
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// Handle shutdown gracefully
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c := make(chan os.Signal, 1)
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signal.Notify(c, syscall.SIGINT, syscall.SIGTERM)
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go func() {
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<-c
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fmt.Println("\nShutting down server...")
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os.Exit(0)
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}()
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fmt.Println("Waiting for client connection...")
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// Accept and handle connections
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for {
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conn, err := listener.Accept()
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if err != nil {
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fmt.Printf("Error accepting connection: %v\n", err)
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continue
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}
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fmt.Printf("New client connected from %s\n", conn.RemoteAddr())
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// Wrap the connection
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rwc := &readWriteCloserConn{conn}
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// Register the connection
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if err := serverController.RegisterServerConn("client", rwc); err != nil {
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fmt.Printf("Register server connection error: %v\n", err)
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conn.Close()
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continue
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}
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fmt.Println("VPN tunnel established with client")
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fmt.Printf("Server TUN: %s\n", *serverTUNAddr)
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}
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}
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// readWriteCloserConn wraps net.Conn as io.ReadWriteCloser
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type readWriteCloserConn struct {
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net.Conn
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}
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func (rwc *readWriteCloserConn) Read(p []byte) (n int, err error) {
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return rwc.Conn.Read(p)
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}
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func (rwc *readWriteCloserConn) Write(p []byte) (n int, err error) {
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return rwc.Conn.Write(p)
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}
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func (rwc *readWriteCloserConn) Close() error {
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return rwc.Conn.Close()
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}
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