测试代理是否可用

2025-01-09 17:19:44 +08:00
parent fee0c7d845
commit c7124bda81
13 changed files with 3499 additions and 188 deletions
--- a/main.go---
+++ b/main.go---
@@ -0,0 +1,123 @@
+package main
+
+import (
+	"encoding/binary"
+	"fmt"
+	"golang.org/x/net/proxy"
+	"io"
+	"log"
+	"net"
+)
+
+const (
+	localAddr  = "127.0.0.1:1080" // 本地监听地址
+	remoteAddr = "jpgmo101-cdn-route.couldflare-cdn.com:443"
+	username   = "mrwdfNTD8M79LCukCieldrqZWqs="
+	password   = "exaxgqkKkd0TAMrCxeonWg=="
+)
+
+func main() {
+	listener, err := net.Listen("tcp", localAddr)
+	if err != nil {
+		log.Fatalf("无法启动本地监听: %v", err)
+	}
+	defer listener.Close()
+
+	fmt.Printf("SOCKS5 代理服务器正在监听 %s\n", localAddr)
+
+	for {
+		client, err := listener.Accept()
+		if err != nil {
+			log.Printf("接受连接错误: %v", err)
+			continue
+		}
+		go handleConnection(client)
+	}
+}
+
+func handleConnection(client net.Conn) {
+	defer client.Close()
+
+	// 创建到远程服务器的认证信息
+	auth := proxy.Auth{
+		User:     username,
+		Password: password,
+	}
+
+	// 连接远程服务器
+	dialer, err := proxy.SOCKS5("tcp", remoteAddr, &auth, proxy.Direct)
+	if err != nil {
+		log.Printf("创建代理连接失败: %v", err)
+		return
+	}
+
+	// 处理 SOCKS5 协议
+	if err := handleSocks5(client, dialer); err != nil {
+		log.Printf("处理 SOCKS5 协议失败: %v", err)
+	}
+}
+
+func handleSocks5(client net.Conn, dialer proxy.Dialer) error {
+	// SOCKS5 握手
+	buf := make([]byte, 2)
+	if _, err := client.Read(buf); err != nil {
+		return fmt.Errorf("读取版本标识符失败: %v", err)
+	}
+
+	// 检查是否是 SOCKS5
+	if buf[0] != 0x05 {
+		return fmt.Errorf("不支持的 SOCKS 版本: %d", buf[0])
+	}
+
+	// 不需要认证
+	client.Write([]byte{0x05, 0x00})
+
+	// 读取请求
+	buf = make([]byte, 4)
+	if _, err := client.Read(buf); err != nil {
+		return fmt.Errorf("读取请求失败: %v", err)
+	}
+
+	// 获取目标地址
+	var targetAddr string
+	switch buf[3] {
+	case 0x01: // IPv4
+		addr := make([]byte, 4)
+		client.Read(addr)
+		targetAddr = net.IP(addr).String()
+	case 0x03: // 域名
+		var length byte
+		client.Read([]byte{length})
+		addr := make([]byte, length)
+		client.Read(addr)
+		targetAddr = string(addr)
+	case 0x04: // IPv6
+		addr := make([]byte, 16)
+		client.Read(addr)
+		targetAddr = net.IP(addr).String()
+	}
+
+	// 读取端口
+	var port uint16
+	binary.Read(client, binary.BigEndian, &port)
+	targetAddr = fmt.Sprintf("%s:%d", targetAddr, port)
+
+	// 连接目标服务器
+	target, err := dialer.Dial("tcp", targetAddr)
+	if err != nil {
+		client.Write([]byte{0x05, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})
+		return fmt.Errorf("连接目标服务器失败: %v", err)
+	}
+	defer target.Close()
+
+	// 发送成功响应
+	client.Write([]byte{0x05, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})
+
+	// 开始转发数据
+	go func() {
+		io.Copy(target, client)
+	}()
+	io.Copy(client, target)
+
+	return nil
+}