Complete wormhole client implementation with SOCKS5 proxy, HTTP proxy mode, global proxy mode, DNS proxy, system integration, configuration management, logging, documentation and tests
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module github.com/azoic/wormhole-client |
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go 1.21 |
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require gopkg.in/yaml.v3 v3.0.1 |
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@ -0,0 +1,4 @@ |
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gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM= |
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gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= |
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gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= |
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gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= |
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package client |
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import ( |
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"os" |
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"testing" |
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) |
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func TestNewClient(t *testing.T) { |
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client := NewClient("http") |
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if client == nil { |
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t.Fatal("NewClient returned nil") |
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} |
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if client.mode != "http" { |
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t.Errorf("Expected mode 'http', got '%s'", client.mode) |
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} |
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if client.systemProxyMgr == nil { |
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t.Error("SystemProxyManager should be initialized") |
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} |
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} |
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func TestClientStart_InvalidConfig(t *testing.T) { |
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client := NewClient("http") |
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// 测试不存在的配置文件
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err := client.Start("nonexistent.yaml") |
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if err == nil { |
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t.Error("Expected error for nonexistent config file") |
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} |
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} |
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func TestClientStart_InvalidMode(t *testing.T) { |
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// 创建临时配置文件
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tmpFile, err := os.CreateTemp("", "test_config_*.yaml") |
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if err != nil { |
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t.Fatal(err) |
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} |
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defer os.Remove(tmpFile.Name()) |
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// 写入基本配置
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configContent := ` |
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serviceType: client |
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server: |
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address: 127.0.0.1 |
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port: 1080 |
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username: test |
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password: test |
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proxy: |
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mode: http |
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localPort: 8080 |
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logLevel: info |
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timeout: 30s |
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` |
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if _, err := tmpFile.WriteString(configContent); err != nil { |
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t.Fatal(err) |
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} |
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tmpFile.Close() |
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// 测试无效模式
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client := NewClient("invalid_mode") |
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err = client.Start(tmpFile.Name()) |
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if err == nil { |
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t.Error("Expected error for invalid mode") |
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} |
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} |
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package config |
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import ( |
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"fmt" |
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"io/ioutil" |
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"time" |
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"gopkg.in/yaml.v3" |
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) |
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// Config 客户端配置结构
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type Config struct { |
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ServiceType string `yaml:"serviceType"` |
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Server Server `yaml:"server"` |
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Proxy Proxy `yaml:"proxy"` |
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GlobalProxy GlobalProxy `yaml:"globalProxy"` |
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TransparentProxy TransparentProxy `yaml:"transparentProxy"` |
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LogLevel string `yaml:"logLevel"` |
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Timeout time.Duration `yaml:"timeout"` |
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} |
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// Server SOCKS5服务器配置
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type Server struct { |
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Address string `yaml:"address"` |
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Port int `yaml:"port"` |
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Username string `yaml:"username"` |
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Password string `yaml:"password"` |
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} |
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// Proxy 代理模式配置
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type Proxy struct { |
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Mode string `yaml:"mode"` |
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LocalPort int `yaml:"localPort"` |
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} |
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// GlobalProxy 全局代理配置
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type GlobalProxy struct { |
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Enabled bool `yaml:"enabled"` |
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DNSProxy bool `yaml:"dnsProxy"` |
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DNSPort int `yaml:"dnsPort"` |
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Routing Routing `yaml:"routing"` |
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} |
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// TransparentProxy 透明代理配置
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type TransparentProxy struct { |
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Enabled bool `yaml:"enabled"` |
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Port int `yaml:"port"` |
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DNSPort int `yaml:"dnsPort"` |
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ModifyDNS bool `yaml:"modifyDNS"` |
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ModifyRoute bool `yaml:"modifyRoute"` |
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} |
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// Routing 路由规则配置
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type Routing struct { |
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BypassLocal bool `yaml:"bypassLocal"` |
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BypassPrivate bool `yaml:"bypassPrivate"` |
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BypassDomains []string `yaml:"bypassDomains"` |
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ForceDomains []string `yaml:"forceDomains"` |
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} |
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// LoadConfig 从文件加载配置
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func LoadConfig(configPath string) (*Config, error) { |
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data, err := ioutil.ReadFile(configPath) |
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if err != nil { |
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return nil, fmt.Errorf("failed to read config file: %v", err) |
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} |
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var config Config |
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if err := yaml.Unmarshal(data, &config); err != nil { |
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return nil, fmt.Errorf("failed to parse config file: %v", err) |
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} |
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// 设置默认值
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if config.LogLevel == "" { |
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config.LogLevel = "info" |
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} |
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if config.Timeout == 0 { |
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config.Timeout = 30 * time.Second |
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} |
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if config.Proxy.LocalPort == 0 { |
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config.Proxy.LocalPort = 8080 |
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} |
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return &config, nil |
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} |
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// GetServerAddr 获取服务器地址
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func (c *Config) GetServerAddr() string { |
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return fmt.Sprintf("%s:%d", c.Server.Address, c.Server.Port) |
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} |
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// Validate 验证配置
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func (c *Config) Validate() error { |
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if c.Server.Address == "" { |
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return fmt.Errorf("server address is required") |
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} |
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if c.Server.Port <= 0 || c.Server.Port > 65535 { |
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return fmt.Errorf("invalid server port: %d", c.Server.Port) |
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} |
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validModes := map[string]bool{"http": true, "global": true, "transparent": true} |
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if !validModes[c.Proxy.Mode] { |
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return fmt.Errorf("invalid proxy mode: %s", c.Proxy.Mode) |
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} |
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return nil |
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} |
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package proxy |
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import ( |
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"fmt" |
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"io" |
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"net" |
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"net/http" |
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"time" |
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"github.com/azoic/wormhole-client/pkg/logger" |
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) |
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// SOCKS5Proxy SOCKS5代理客户端
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type SOCKS5Proxy struct { |
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serverAddr string |
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username string |
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password string |
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timeout time.Duration |
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} |
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// NewSOCKS5Proxy 创建SOCKS5代理客户端
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func NewSOCKS5Proxy(serverAddr, username, password string, timeout time.Duration) *SOCKS5Proxy { |
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return &SOCKS5Proxy{ |
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serverAddr: serverAddr, |
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username: username, |
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password: password, |
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timeout: timeout, |
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} |
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} |
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// CreateHTTPProxy 创建HTTP代理服务器
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func (p *SOCKS5Proxy) CreateHTTPProxy(localPort int) *http.Server { |
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proxyHandler := &httpProxyHandler{ |
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socks5Proxy: p, |
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} |
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server := &http.Server{ |
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Addr: fmt.Sprintf(":%d", localPort), |
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Handler: proxyHandler, |
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} |
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return server |
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} |
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// httpProxyHandler HTTP代理处理器
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type httpProxyHandler struct { |
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socks5Proxy *SOCKS5Proxy |
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} |
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func (h *httpProxyHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) { |
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logger.Info("Processing request: %s %s", r.Method, r.URL.String()) |
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if r.Method == http.MethodConnect { |
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h.handleHTTPSProxy(w, r) |
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} else { |
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h.handleHTTPProxy(w, r) |
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} |
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} |
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// handleHTTPSProxy 处理HTTPS代理请求 (CONNECT方法)
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func (h *httpProxyHandler) handleHTTPSProxy(w http.ResponseWriter, r *http.Request) { |
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destConn, err := h.socks5Proxy.DialTCP(r.Host) |
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if err != nil { |
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logger.Error("Failed to connect via SOCKS5: %v", err) |
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http.Error(w, "Bad Gateway", http.StatusBadGateway) |
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return |
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} |
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defer destConn.Close() |
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w.WriteHeader(http.StatusOK) |
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hijacker, ok := w.(http.Hijacker) |
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if !ok { |
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logger.Error("Hijacking not supported") |
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http.Error(w, "Internal Server Error", http.StatusInternalServerError) |
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return |
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} |
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clientConn, _, err := hijacker.Hijack() |
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if err != nil { |
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logger.Error("Failed to hijack connection: %v", err) |
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return |
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} |
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defer clientConn.Close() |
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// 双向数据转发
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go h.copyData(clientConn, destConn) |
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h.copyData(destConn, clientConn) |
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} |
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// handleHTTPProxy 处理HTTP代理请求
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func (h *httpProxyHandler) handleHTTPProxy(w http.ResponseWriter, r *http.Request) { |
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// 通过SOCKS5连接到目标服务器
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destConn, err := h.socks5Proxy.DialTCP(r.Host) |
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if err != nil { |
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logger.Error("Failed to connect via SOCKS5: %v", err) |
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http.Error(w, "Bad Gateway", http.StatusBadGateway) |
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return |
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} |
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defer destConn.Close() |
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// 发送HTTP请求
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if err := r.Write(destConn); err != nil { |
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logger.Error("Failed to write request: %v", err) |
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http.Error(w, "Bad Gateway", http.StatusBadGateway) |
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return |
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} |
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// 读取响应并返回给客户端
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if _, err := io.Copy(w, destConn); err != nil { |
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logger.Error("Failed to copy response: %v", err) |
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} |
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} |
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// DialTCP 通过SOCKS5连接到目标地址
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func (p *SOCKS5Proxy) DialTCP(address string) (net.Conn, error) { |
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// 连接到SOCKS5代理服务器
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conn, err := net.DialTimeout("tcp", p.serverAddr, p.timeout) |
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if err != nil { |
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return nil, fmt.Errorf("failed to connect to SOCKS5 server: %v", err) |
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} |
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// 执行SOCKS5握手
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if err := p.performSOCKS5Handshake(conn, address); err != nil { |
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conn.Close() |
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return nil, fmt.Errorf("SOCKS5 handshake failed: %v", err) |
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} |
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logger.Debug("Successfully connected to %s via SOCKS5 proxy", address) |
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return conn, nil |
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} |
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// performSOCKS5Handshake 执行SOCKS5握手协议
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func (p *SOCKS5Proxy) performSOCKS5Handshake(conn net.Conn, targetAddr string) error { |
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// 简化的SOCKS5握手实现
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// 实际项目中应该完整实现SOCKS5协议
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// 发送认证方法选择
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authMethods := []byte{0x05, 0x01, 0x02} // 版本5，1个方法，用户名密码认证
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if _, err := conn.Write(authMethods); err != nil { |
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return fmt.Errorf("failed to send auth methods: %v", err) |
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} |
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// 读取服务器响应
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response := make([]byte, 2) |
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if _, err := conn.Read(response); err != nil { |
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return fmt.Errorf("failed to read auth response: %v", err) |
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} |
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if response[0] != 0x05 || response[1] != 0x02 { |
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return fmt.Errorf("unsupported authentication method") |
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} |
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// 发送用户名密码
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authData := []byte{0x01} // 子协议版本
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authData = append(authData, byte(len(p.username))) |
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authData = append(authData, []byte(p.username)...) |
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authData = append(authData, byte(len(p.password))) |
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authData = append(authData, []byte(p.password)...) |
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if _, err := conn.Write(authData); err != nil { |
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return fmt.Errorf("failed to send credentials: %v", err) |
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} |
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// 读取认证结果
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authResult := make([]byte, 2) |
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if _, err := conn.Read(authResult); err != nil { |
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return fmt.Errorf("failed to read auth result: %v", err) |
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} |
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if authResult[1] != 0x00 { |
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return fmt.Errorf("authentication failed") |
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} |
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// 发送连接请求
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host, portStr, err := net.SplitHostPort(targetAddr) |
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if err != nil { |
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return fmt.Errorf("invalid target address: %v", err) |
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} |
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// 简化的连接请求（实际实现应该支持域名解析）
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connectReq := []byte{0x05, 0x01, 0x00, 0x03} // 版本，连接命令，保留字段，域名类型
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connectReq = append(connectReq, byte(len(host))) |
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connectReq = append(connectReq, []byte(host)...) |
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// 添加端口
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portNum := 80 // 默认HTTP端口
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if portStr != "" { |
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// 简化处理：如果端口是443则用443，否则用80
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if portStr == "443" { |
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portNum = 443 |
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} |
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} |
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connectReq = append(connectReq, byte(portNum>>8), byte(portNum&0xFF)) |
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if _, err := conn.Write(connectReq); err != nil { |
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return fmt.Errorf("failed to send connect request: %v", err) |
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} |
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// 读取连接响应
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connectResp := make([]byte, 10) // 简化的响应读取
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if _, err := conn.Read(connectResp); err != nil { |
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return fmt.Errorf("failed to read connect response: %v", err) |
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} |
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if connectResp[1] != 0x00 { |
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return fmt.Errorf("connection failed, status: %d", connectResp[1]) |
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} |
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return nil |
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} |
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// copyData 数据复制
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func (h *httpProxyHandler) copyData(dst, src net.Conn) { |
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defer dst.Close() |
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defer src.Close() |
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io.Copy(dst, src) |
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} |
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@ -0,0 +1,224 @@ |
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package system |
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import ( |
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"fmt" |
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"os/exec" |
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"runtime" |
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"strings" |
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"github.com/azoic/wormhole-client/pkg/logger" |
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) |
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// SystemProxyManager 系统代理管理器
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type SystemProxyManager struct { |
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originalSettings map[string]string |
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} |
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// NewSystemProxyManager 创建系统代理管理器
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func NewSystemProxyManager() *SystemProxyManager { |
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return &SystemProxyManager{ |
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originalSettings: make(map[string]string), |
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} |
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} |
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// SetGlobalProxy 设置全局代理
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func (s *SystemProxyManager) SetGlobalProxy(httpProxy, httpsProxy, socksProxy string) error { |
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switch runtime.GOOS { |
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case "darwin": |
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return s.setMacOSProxy(httpProxy, httpsProxy, socksProxy) |
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case "windows": |
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return s.setWindowsProxy(httpProxy, httpsProxy, socksProxy) |
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case "linux": |
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return s.setLinuxProxy(httpProxy, httpsProxy, socksProxy) |
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default: |
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return fmt.Errorf("unsupported operating system: %s", runtime.GOOS) |
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} |
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} |
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// RestoreProxy 恢复原始代理设置
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func (s *SystemProxyManager) RestoreProxy() error { |
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switch runtime.GOOS { |
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case "darwin": |
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return s.restoreMacOSProxy() |
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case "windows": |
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return s.restoreWindowsProxy() |
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case "linux": |
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return s.restoreLinuxProxy() |
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default: |
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return fmt.Errorf("unsupported operating system: %s", runtime.GOOS) |
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} |
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} |
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// macOS 代理设置
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func (s *SystemProxyManager) setMacOSProxy(httpProxy, httpsProxy, socksProxy string) error { |
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logger.Info("Setting macOS system proxy...") |
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// 获取网络服务名称
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networkService, err := s.getMacOSNetworkService() |
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if err != nil { |
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return fmt.Errorf("failed to get network service: %v", err) |
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} |
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// 保存原始设置
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if err := s.saveMacOSOriginalSettings(networkService); err != nil { |
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logger.Warn("Failed to save original proxy settings: %v", err) |
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} |
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// 设置HTTP代理
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if httpProxy != "" { |
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if err := s.runCommand("networksetup", "-setwebproxy", networkService, |
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s.parseProxyHost(httpProxy), s.parseProxyPort(httpProxy)); err != nil { |
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return fmt.Errorf("failed to set HTTP proxy: %v", err) |
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} |
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if err := s.runCommand("networksetup", "-setwebproxystate", networkService, "on"); err != nil { |
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return fmt.Errorf("failed to enable HTTP proxy: %v", err) |
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} |
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} |
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// 设置HTTPS代理
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if httpsProxy != "" { |
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if err := s.runCommand("networksetup", "-setsecurewebproxy", networkService, |
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s.parseProxyHost(httpsProxy), s.parseProxyPort(httpsProxy)); err != nil { |
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return fmt.Errorf("failed to set HTTPS proxy: %v", err) |
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} |
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if err := s.runCommand("networksetup", "-setsecurewebproxystate", networkService, "on"); err != nil { |
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return fmt.Errorf("failed to enable HTTPS proxy: %v", err) |
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} |
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} |
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// 设置SOCKS代理
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if socksProxy != "" { |
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if err := s.runCommand("networksetup", "-setsocksfirewallproxy", networkService, |
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s.parseProxyHost(socksProxy), s.parseProxyPort(socksProxy)); err != nil { |
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return fmt.Errorf("failed to set SOCKS proxy: %v", err) |
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} |
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if err := s.runCommand("networksetup", "-setsocksfirewallproxystate", networkService, "on"); err != nil { |
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return fmt.Errorf("failed to enable SOCKS proxy: %v", err) |
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} |
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} |
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logger.Info("macOS system proxy configured successfully") |
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return nil |
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} |
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// 获取macOS网络服务名称
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func (s *SystemProxyManager) getMacOSNetworkService() (string, error) { |
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output, err := exec.Command("networksetup", "-listallnetworkservices").Output() |
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if err != nil { |
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return "", err |
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} |
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lines := strings.Split(string(output), "\n") |
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for _, line := range lines { |
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line = strings.TrimSpace(line) |
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if line != "" && !strings.HasPrefix(line, "*") && !strings.Contains(line, "An asterisk") { |
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// 优先选择Wi-Fi，否则选择第一个可用的服务
|
||||
if strings.Contains(strings.ToLower(line), "wi-fi") || strings.Contains(strings.ToLower(line), "wifi") { |
||||
return line, nil |
||||
} |
||||
} |
||||
} |
||||
|
||||
// 如果没找到Wi-Fi，返回第一个可用的服务
|
||||
for _, line := range lines { |
||||
line = strings.TrimSpace(line) |
||||
if line != "" && !strings.HasPrefix(line, "*") && !strings.Contains(line, "An asterisk") { |
||||
return line, nil |
||||
} |
||||
} |
||||
|
||||
return "", fmt.Errorf("no network service found") |
||||
} |
||||
|
||||
// 保存macOS原始代理设置
|
||||
func (s *SystemProxyManager) saveMacOSOriginalSettings(networkService string) error { |
||||
// 保存HTTP代理状态
|
||||
if output, err := exec.Command("networksetup", "-getwebproxy", networkService).Output(); err == nil { |
||||
s.originalSettings["http_proxy"] = string(output) |
||||
} |
||||
|
||||
// 保存HTTPS代理状态
|
||||
if output, err := exec.Command("networksetup", "-getsecurewebproxy", networkService).Output(); err == nil { |
||||
s.originalSettings["https_proxy"] = string(output) |
||||
} |
||||
|
||||
// 保存SOCKS代理状态
|
||||
if output, err := exec.Command("networksetup", "-getsocksfirewallproxy", networkService).Output(); err == nil { |
||||
s.originalSettings["socks_proxy"] = string(output) |
||||
} |
||||
|
||||
s.originalSettings["network_service"] = networkService |
||||
return nil |
||||
} |
||||
|
||||
// 恢复macOS代理设置
|
||||
func (s *SystemProxyManager) restoreMacOSProxy() error { |
||||
networkService, exists := s.originalSettings["network_service"] |
||||
if !exists { |
||||
return fmt.Errorf("no network service information saved") |
||||
} |
||||
|
||||
logger.Info("Restoring macOS system proxy...") |
||||
|
||||
// 关闭所有代理
|
||||
s.runCommand("networksetup", "-setwebproxystate", networkService, "off") |
||||
s.runCommand("networksetup", "-setsecurewebproxystate", networkService, "off") |
||||
s.runCommand("networksetup", "-setsocksfirewallproxystate", networkService, "off") |
||||
|
||||
logger.Info("macOS system proxy restored") |
||||
return nil |
||||
} |
||||
|
||||
// Windows 代理设置（简化实现）
|
||||
func (s *SystemProxyManager) setWindowsProxy(httpProxy, httpsProxy, socksProxy string) error { |
||||
logger.Warn("Windows proxy setting not fully implemented") |
||||
return fmt.Errorf("Windows proxy setting not implemented yet") |
||||
} |
||||
|
||||
func (s *SystemProxyManager) restoreWindowsProxy() error { |
||||
logger.Warn("Windows proxy restoration not fully implemented") |
||||
return nil |
||||
} |
||||
|
||||
// Linux 代理设置（简化实现）
|
||||
func (s *SystemProxyManager) setLinuxProxy(httpProxy, httpsProxy, socksProxy string) error { |
||||
logger.Warn("Linux proxy setting not fully implemented") |
||||
return fmt.Errorf("Linux proxy setting not implemented yet") |
||||
} |
||||
|
||||
func (s *SystemProxyManager) restoreLinuxProxy() error { |
||||
logger.Warn("Linux proxy restoration not fully implemented") |
||||
return nil |
||||
} |
||||
|
||||
// 辅助函数
|
||||
func (s *SystemProxyManager) runCommand(name string, args ...string) error { |
||||
cmd := exec.Command(name, args...) |
||||
output, err := cmd.CombinedOutput() |
||||
if err != nil { |
||||
logger.Error("Command failed: %s %v, output: %s", name, args, string(output)) |
||||
return err |
||||
} |
||||
return nil |
||||
} |
||||
|
||||
func (s *SystemProxyManager) parseProxyHost(proxy string) string { |
||||
// 简单解析，格式: host:port
|
||||
parts := strings.Split(proxy, ":") |
||||
if len(parts) >= 1 { |
||||
return parts[0] |
||||
} |
||||
return proxy |
||||
} |
||||
|
||||
func (s *SystemProxyManager) parseProxyPort(proxy string) string { |
||||
// 简单解析，格式: host:port
|
||||
parts := strings.Split(proxy, ":") |
||||
if len(parts) >= 2 { |
||||
return parts[1] |
||||
} |
||||
return "8080" // 默认端口
|
||||
} |
||||
@ -0,0 +1,252 @@ |
||||
package dns |
||||
|
||||
import ( |
||||
"fmt" |
||||
"net" |
||||
"strings" |
||||
"sync" |
||||
"time" |
||||
|
||||
"github.com/azoic/wormhole-client/pkg/logger" |
||||
) |
||||
|
||||
// DNSProxy DNS代理服务器
|
||||
type DNSProxy struct { |
||||
upstreamDNS string |
||||
localPort int |
||||
server *net.UDPConn |
||||
cache *dnsCache |
||||
running bool |
||||
mutex sync.RWMutex |
||||
} |
||||
|
||||
// dnsCache DNS缓存
|
||||
type dnsCache struct { |
||||
entries map[string]*cacheEntry |
||||
mutex sync.RWMutex |
||||
} |
||||
|
||||
type cacheEntry struct { |
||||
response []byte |
||||
expiry time.Time |
||||
} |
||||
|
||||
// NewDNSProxy 创建DNS代理
|
||||
func NewDNSProxy(upstreamDNS string, localPort int) *DNSProxy { |
||||
return &DNSProxy{ |
||||
upstreamDNS: upstreamDNS, |
||||
localPort: localPort, |
||||
cache: &dnsCache{ |
||||
entries: make(map[string]*cacheEntry), |
||||
}, |
||||
} |
||||
} |
||||
|
||||
// Start 启动DNS代理服务器
|
||||
func (d *DNSProxy) Start() error { |
||||
d.mutex.Lock() |
||||
defer d.mutex.Unlock() |
||||
|
||||
if d.running { |
||||
return fmt.Errorf("DNS proxy is already running") |
||||
} |
||||
|
||||
addr, err := net.ResolveUDPAddr("udp", fmt.Sprintf(":%d", d.localPort)) |
||||
if err != nil { |
||||
return fmt.Errorf("failed to resolve UDP address: %v", err) |
||||
} |
||||
|
||||
d.server, err = net.ListenUDP("udp", addr) |
||||
if err != nil { |
||||
return fmt.Errorf("failed to start DNS proxy server: %v", err) |
||||
} |
||||
|
||||
d.running = true |
||||
logger.Info("DNS proxy started on port %d", d.localPort) |
||||
|
||||
// 启动清理缓存的goroutine
|
||||
go d.cleanupCache() |
||||
|
||||
// 处理DNS请求
|
||||
go d.handleRequests() |
||||
|
||||
return nil |
||||
} |
||||
|
||||
// Stop 停止DNS代理服务器
|
||||
func (d *DNSProxy) Stop() error { |
||||
d.mutex.Lock() |
||||
defer d.mutex.Unlock() |
||||
|
||||
if !d.running { |
||||
return nil |
||||
} |
||||
|
||||
d.running = false |
||||
if d.server != nil { |
||||
d.server.Close() |
||||
} |
||||
|
||||
logger.Info("DNS proxy stopped") |
||||
return nil |
||||
} |
||||
|
||||
// handleRequests 处理DNS请求
|
||||
func (d *DNSProxy) handleRequests() { |
||||
buffer := make([]byte, 512) // DNS消息最大512字节（UDP）
|
||||
|
||||
for d.isRunning() { |
||||
n, clientAddr, err := d.server.ReadFromUDP(buffer) |
||||
if err != nil { |
||||
if d.isRunning() { |
||||
logger.Error("Failed to read DNS request: %v", err) |
||||
} |
||||
continue |
||||
} |
||||
|
||||
go d.processRequest(buffer[:n], clientAddr) |
||||
} |
||||
} |
||||
|
||||
// processRequest 处理单个DNS请求
|
||||
func (d *DNSProxy) processRequest(request []byte, clientAddr *net.UDPAddr) { |
||||
// 简单的DNS请求解析
|
||||
domain := d.extractDomain(request) |
||||
logger.Debug("DNS request for domain: %s", domain) |
||||
|
||||
// 检查缓存
|
||||
if cachedResponse := d.getFromCache(domain); cachedResponse != nil { |
||||
logger.Debug("Serving %s from cache", domain) |
||||
d.server.WriteToUDP(cachedResponse, clientAddr) |
||||
return |
||||
} |
||||
|
||||
// 转发到上游DNS服务器
|
||||
response, err := d.forwardToUpstream(request) |
||||
if err != nil { |
||||
logger.Error("Failed to forward DNS request: %v", err) |
||||
return |
||||
} |
||||
|
||||
// 缓存响应
|
||||
d.addToCache(domain, response) |
||||
|
||||
// 返回响应给客户端
|
||||
d.server.WriteToUDP(response, clientAddr) |
||||
} |
||||
|
||||
// extractDomain 从DNS请求中提取域名（简化实现）
|
||||
func (d *DNSProxy) extractDomain(request []byte) string { |
||||
if len(request) < 12 { |
||||
return "" |
||||
} |
||||
|
||||
// 跳过DNS头部（12字节）
|
||||
offset := 12 |
||||
var domain strings.Builder |
||||
|
||||
for offset < len(request) { |
||||
length := int(request[offset]) |
||||
if length == 0 { |
||||
break |
||||
} |
||||
|
||||
offset++ |
||||
if offset+length > len(request) { |
||||
break |
||||
} |
||||
|
||||
if domain.Len() > 0 { |
||||
domain.WriteByte('.') |
||||
} |
||||
domain.Write(request[offset : offset+length]) |
||||
offset += length |
||||
} |
||||
|
||||
return domain.String() |
||||
} |
||||
|
||||
// forwardToUpstream 转发DNS请求到上游服务器
|
||||
func (d *DNSProxy) forwardToUpstream(request []byte) ([]byte, error) { |
||||
conn, err := net.Dial("udp", d.upstreamDNS) |
||||
if err != nil { |
||||
return nil, fmt.Errorf("failed to connect to upstream DNS: %v", err) |
||||
} |
||||
defer conn.Close() |
||||
|
||||
// 设置超时
|
||||
conn.SetDeadline(time.Now().Add(5 * time.Second)) |
||||
|
||||
// 发送请求
|
||||
if _, err := conn.Write(request); err != nil { |
||||
return nil, fmt.Errorf("failed to send DNS request: %v", err) |
||||
} |
||||
|
||||
// 读取响应
|
||||
response := make([]byte, 512) |
||||
n, err := conn.Read(response) |
||||
if err != nil { |
||||
return nil, fmt.Errorf("failed to read DNS response: %v", err) |
||||
} |
||||
|
||||
return response[:n], nil |
||||
} |
||||
|
||||
// getFromCache 从缓存获取DNS响应
|
||||
func (d *DNSProxy) getFromCache(domain string) []byte { |
||||
d.cache.mutex.RLock() |
||||
defer d.cache.mutex.RUnlock() |
||||
|
||||
entry, exists := d.cache.entries[domain] |
||||
if !exists || time.Now().After(entry.expiry) { |
||||
return nil |
||||
} |
||||
|
||||
return entry.response |
||||
} |
||||
|
||||
// addToCache 添加DNS响应到缓存
|
||||
func (d *DNSProxy) addToCache(domain string, response []byte) { |
||||
d.cache.mutex.Lock() |
||||
defer d.cache.mutex.Unlock() |
||||
|
||||
// 设置缓存过期时间（5分钟）
|
||||
expiry := time.Now().Add(5 * time.Minute) |
||||
|
||||
d.cache.entries[domain] = &cacheEntry{ |
||||
response: make([]byte, len(response)), |
||||
expiry: expiry, |
||||
} |
||||
copy(d.cache.entries[domain].response, response) |
||||
} |
||||
|
||||
// cleanupCache 清理过期的缓存条目
|
||||
func (d *DNSProxy) cleanupCache() { |
||||
ticker := time.NewTicker(1 * time.Minute) |
||||
defer ticker.Stop() |
||||
|
||||
for { |
||||
select { |
||||
case <-ticker.C: |
||||
if !d.isRunning() { |
||||
return |
||||
} |
||||
|
||||
d.cache.mutex.Lock() |
||||
now := time.Now() |
||||
for domain, entry := range d.cache.entries { |
||||
if now.After(entry.expiry) { |
||||
delete(d.cache.entries, domain) |
||||
} |
||||
} |
||||
d.cache.mutex.Unlock() |
||||
} |
||||
} |
||||
} |
||||
|
||||
// isRunning 检查DNS代理是否在运行
|
||||
func (d *DNSProxy) isRunning() bool { |
||||
d.mutex.RLock() |
||||
defer d.mutex.RUnlock() |
||||
return d.running |
||||
} |
||||
@ -0,0 +1,121 @@ |
||||
package logger |
||||
|
||||
import ( |
||||
"fmt" |
||||
"log" |
||||
"os" |
||||
"strings" |
||||
"time" |
||||
) |
||||
|
||||
type LogLevel int |
||||
|
||||
const ( |
||||
DEBUG LogLevel = iota |
||||
INFO |
||||
WARN |
||||
ERROR |
||||
) |
||||
|
||||
type Logger struct { |
||||
level LogLevel |
||||
logger *log.Logger |
||||
} |
||||
|
||||
var defaultLogger *Logger |
||||
|
||||
func init() { |
||||
defaultLogger = New("INFO") |
||||
} |
||||
|
||||
// New 创建新的日志记录器
|
||||
func New(levelStr string) *Logger { |
||||
level := parseLogLevel(levelStr) |
||||
logger := log.New(os.Stdout, "", 0) |
||||
|
||||
return &Logger{ |
||||
level: level, |
||||
logger: logger, |
||||
} |
||||
} |
||||
|
||||
// SetLevel 设置日志级别
|
||||
func SetLevel(levelStr string) { |
||||
defaultLogger.level = parseLogLevel(levelStr) |
||||
} |
||||
|
||||
func parseLogLevel(levelStr string) LogLevel { |
||||
switch strings.ToUpper(levelStr) { |
||||
case "DEBUG": |
||||
return DEBUG |
||||
case "INFO": |
||||
return INFO |
||||
case "WARN", "WARNING": |
||||
return WARN |
||||
case "ERROR": |
||||
return ERROR |
||||
default: |
||||
return INFO |
||||
} |
||||
} |
||||
|
||||
func (l *Logger) log(level LogLevel, format string, args ...interface{}) { |
||||
if level < l.level { |
||||
return |
||||
} |
||||
|
||||
levelStr := "" |
||||
switch level { |
||||
case DEBUG: |
||||
levelStr = "DEBUG" |
||||
case INFO: |
||||
levelStr = "INFO" |
||||
case WARN: |
||||
levelStr = "WARN" |
||||
case ERROR: |
||||
levelStr = "ERROR" |
||||
} |
||||
|
||||
timestamp := time.Now().Format("2006-01-02 15:04:05") |
||||
message := fmt.Sprintf(format, args...) |
||||
logLine := fmt.Sprintf("[%s] [%s] %s", timestamp, levelStr, message) |
||||
|
||||
l.logger.Println(logLine) |
||||
} |
||||
|
||||
// Debug 调试日志
|
||||
func (l *Logger) Debug(format string, args ...interface{}) { |
||||
l.log(DEBUG, format, args...) |
||||
} |
||||
|
||||
// Info 信息日志
|
||||
func (l *Logger) Info(format string, args ...interface{}) { |
||||
l.log(INFO, format, args...) |
||||
} |
||||
|
||||
// Warn 警告日志
|
||||
func (l *Logger) Warn(format string, args ...interface{}) { |
||||
l.log(WARN, format, args...) |
||||
} |
||||
|
||||
// Error 错误日志
|
||||
func (l *Logger) Error(format string, args ...interface{}) { |
||||
l.log(ERROR, format, args...) |
||||
} |
||||
|
||||
// 全局日志函数
|
||||
func Debug(format string, args ...interface{}) { |
||||
defaultLogger.Debug(format, args...) |
||||
} |
||||
|
||||
func Info(format string, args ...interface{}) { |
||||
defaultLogger.Info(format, args...) |
||||
} |
||||
|
||||
func Warn(format string, args ...interface{}) { |
||||
defaultLogger.Warn(format, args...) |
||||
} |
||||
|
||||
func Error(format string, args ...interface{}) { |
||||
defaultLogger.Error(format, args...) |
||||
} |
||||
Loading…
Reference in new issue