Fix DHCP client unable to get IP and config not persisting

- Fixed verifyAssignment being too strict for new clients - Fixed parseRequestedIP string conversion bug - Fixed response sent to 0.0.0.0 instead of broadcast address - Added SO_BROADCAST support for UDP socket - Fixed session persistence after page refresh (localStorage) - Added in-memory session store for auth middleware - Added config reloader so DHCP server picks up web UI changes dynamically
2026-04-24 16:03:54 +08:00
commit 8ad4c3576d
39 changed files with 7756 additions and 0 deletions
@@ -0,0 +1,76 @@
+package config
+
+import (
+	"encoding/json"
+	"os"
+)
+
+type Config struct {
+	DHCP   DHCPConfig   `json:"dhcp"`
+	DNS    DNSConfig    `json:"dns"`
+	Web    WebConfig    `json:"web"`
+	Database DatabaseConfig `json:"database"`
+}
+
+type DHCPConfig struct {
+	Enabled          bool     `json:"enabled"`
+	Interface        string   `json:"interface"`
+	Network          string   `json:"network"`
+	Netmask          string   `json:"netmask"`
+	Gateway          string   `json:"gateway"`
+	DNSServers       []string `json:"dns_servers"`
+	NTPServers       []string `json:"ntp_servers"`
+	BroadcastAddress string   `json:"broadcast_address"`
+	LeaseTime        int      `json:"lease_time"` // seconds
+	IPPoolStart      string   `json:"ip_pool_start"`
+	IPPoolEnd        string   `json:"ip_pool_end"`
+	DomainName       string   `json:"domain_name"`
+	ExcludedIPs      []string `json:"excluded_ips"`
+}
+
+type DNSConfig struct {
+	Enabled          bool     `json:"enabled"`
+	ListenAddr       string   `json:"listen_addr"`
+	ListenPort       int      `json:"listen_port"`
+	Upstream         []string `json:"upstream"`
+	CacheSize        int      `json:"cache_size"`
+	CacheTTL         int      `json:"cache_ttl"`
+	Recursion        bool     `json:"recursion"`
+	AllowQuery       []string `json:"allow_query"`
+	DNSSECValidation bool     `json:"dnssec_validation"`
+}
+
+type WebConfig struct {
+	Host        string `json:"host"`
+	Port        int    `json:"port"`
+	SessionKey  string `json:"session_key"`
+	EnableHTTPS bool   `json:"enable_https"`
+	CertFile    string `json:"https_cert"`
+	KeyFile     string `json:"https_key"`
+}
+
+type DatabaseConfig struct {
+	Path string `json:"path"`
+}
+
+func LoadConfig(path string) (*Config, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+
+	var cfg Config
+	if err := json.Unmarshal(data, &cfg); err != nil {
+		return nil, err
+	}
+
+	return &cfg, nil
+}
+
+func (c *Config) Save(path string) error {
+	data, err := json.MarshalIndent(c, "", "  ")
+	if err != nil {
+		return err
+	}
+	return os.WriteFile(path, data, 0644)
+}