Initial commit: 网络拓扑发现系统

- 支持Cisco、华为、H3C、ASA、Linux、Windows设备
- SSH远程采集设备信息
- 自动发现网络拓扑(LLDP/CDP)
- Web可视化界面
- 支持旧版SSH加密算法兼容

internal/config/config.go

@@ -0,0 +1,125 @@
+package config
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"network-topology-discovery/pkg/models"
+)
+
+// Config 应用配置
+type Config struct {
+	ScanRanges []string       `json:"scan_ranges"`
+	Devices    []DeviceConfig `json:"devices"`
+	SSH        SSHConfig      `json:"ssh"`
+	Web        WebConfig      `json:"web"`
+	Scanner    ScannerConfig  `json:"scanner"`
+}
+
+// DeviceConfig 设备配置
+type DeviceConfig struct {
+	IP       string         `json:"ip"`
+	Type     models.DeviceType `json:"type"`
+	Username string         `json:"username"`
+	Password string         `json:"password"`
+	KeyFile  string         `json:"key_file"`
+	Port     int            `json:"port"`
+}
+
+// SSHConfig SSH配置
+type SSHConfig struct {
+	Timeout    int `json:"timeout"`
+	MaxRetries int `json:"max_retries"`
+	Port       int `json:"port"`
+}
+
+// WebConfig Web服务配置
+type WebConfig struct {
+	Port int    `json:"port"`
+	Host string `json:"host"`
+}
+
+// ScannerConfig 扫描器配置
+type ScannerConfig struct {
+	Concurrency int `json:"concurrency"`
+	Timeout     int `json:"timeout"`
+}
+
+// LoadConfig 从文件加载配置
+func LoadConfig(filename string) (*Config, error) {
+	data, err := os.ReadFile(filename)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read config file: %w", err)
+	}
+
+	var config Config
+	if err := json.Unmarshal(data, &config); err != nil {
+		return nil, fmt.Errorf("failed to parse config file: %w", err)
+	}
+
+	// 设置默认值
+	config.setDefaults()
+
+	return &config, nil
+}
+
+// SaveConfig 保存配置到文件
+func SaveConfig(filename string, config *Config) error {
+	data, err := json.MarshalIndent(config, "", "  ")
+	if err != nil {
+		return fmt.Errorf("failed to marshal config: %w", err)
+	}
+
+	if err := os.WriteFile(filename, data, 0644); err != nil {
+		return fmt.Errorf("failed to write config file: %w", err)
+	}
+
+	return nil
+}
+
+// DefaultConfig 返回默认配置
+func DefaultConfig() *Config {
+	config := &Config{
+		ScanRanges: []string{},
+		Devices:    []DeviceConfig{},
+		SSH: SSHConfig{
+			Timeout:    10,
+			MaxRetries: 3,
+			Port:       22,
+		},
+		Web: WebConfig{
+			Port: 8080,
+			Host: "0.0.0.0",
+		},
+		Scanner: ScannerConfig{
+			Concurrency: 10,
+			Timeout:     2,
+		},
+	}
+	return config
+}
+
+// setDefaults 设置默认值
+func (c *Config) setDefaults() {
+	if c.SSH.Timeout == 0 {
+		c.SSH.Timeout = 10
+	}
+	if c.SSH.MaxRetries == 0 {
+		c.SSH.MaxRetries = 3
+	}
+	if c.SSH.Port == 0 {
+		c.SSH.Port = 22
+	}
+	if c.Web.Port == 0 {
+		c.Web.Port = 8080
+	}
+	if c.Web.Host == "" {
+		c.Web.Host = "0.0.0.0"
+	}
+	if c.Scanner.Concurrency == 0 {
+		c.Scanner.Concurrency = 10
+	}
+	if c.Scanner.Timeout == 0 {
+		c.Scanner.Timeout = 2
+	}
+}