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

test-api.sh

@@ -0,0 +1,66 @@
+#!/bin/bash
+
+# ========================================
+# API 测试脚本
+# ========================================
+
+BASE_URL="http://localhost:8080"
+SESSION_ID="test-session"
+
+echo "🧪 DHCP & DNS 管理器 - API 测试"
+echo "=================================="
+echo ""
+
+# 1. 健康检查
+echo "1. 健康检查..."
+curl -s "$BASE_URL/api/health" | python3 -m json.tool 2>/dev/null || echo "❌ 健康检查失败"
+echo ""
+
+# 2. 登录
+echo "2. 登录..."
+LOGIN_RESPONSE=$(curl -s -X POST "$BASE_URL/api/login" \
+  -H "Content-Type: application/json" \
+  -d '{"username":"admin","password":"admin"}')
+echo "$LOGIN_RESPONSE" | python3 -m json.tool 2>/dev/null || echo "❌ 登录失败"
+echo ""
+
+# 3. 获取 DHCP 配置
+echo "3. 获取 DHCP 配置..."
+curl -s "$BASE_URL/api/dhcp/config" \
+  -H "X-Session-ID: $SESSION_ID" | python3 -m json.tool 2>/dev/null || echo "❌ 获取 DHCP 配置失败"
+echo ""
+
+# 4. 更新 DHCP 配置
+echo "4. 更新 DHCP 配置..."
+curl -s -X PUT "$BASE_URL/api/dhcp/config" \
+  -H "X-Session-ID: $SESSION_ID" \
+  -H "Content-Type: application/json" \
+  -d '{"network":"192.168.1.0","gateway":"192.168.1.1"}' | python3 -m json.tool 2>/dev/null || echo "❌ 更新 DHCP 配置失败"
+echo ""
+
+# 5. 获取 DNS 配置
+echo "5. 获取 DNS 配置..."
+curl -s "$BASE_URL/api/dns/config" \
+  -H "X-Session-ID: $SESSION_ID" | python3 -m json.tool 2>/dev/null || echo "❌ 获取 DNS 配置失败"
+echo ""
+
+# 6. 更新 DNS 配置
+echo "6. 更新 DNS 配置..."
+curl -s -X PUT "$BASE_URL/api/dns/config" \
+  -H "X-Session-ID: $SESSION_ID" \
+  -H "Content-Type: application/json" \
+  -d '{"listen_port":53,"recursion":true}' | python3 -m json.tool 2>/dev/null || echo "❌ 更新 DNS 配置失败"
+echo ""
+
+# 7. 获取完整配置
+echo "7. 获取完整配置..."
+curl -s "$BASE_URL/api/config" \
+  -H "X-Session-ID: $SESSION_ID" | python3 -m json.tool 2>/dev/null || echo "❌ 获取完整配置失败"
+echo ""
+
+echo "=================================="
+echo "测试完成！"
+echo ""
+echo "💡 如果所有测试都通过，说明 API 工作正常"
+echo "💡 如果有失败，请检查服务器日志"
+echo ""