network_config.py 24 KB

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  1. import os
  2. import subprocess
  3. import json
  4. import logging
  5. import re
  6. from datetime import datetime
  7. logger = logging.getLogger('serial_mqtt_gateway')
  8. class NetworkConfigManager:
  9. """网络配置管理器,负责处理系统网络配置相关功能"""
  10. def __init__(self):
  11. # 默认配置
  12. self.default_interface = 'eth0' # 默认网络接口
  13. self.network_config_file = '/etc/network/interfaces' # 网络配置文件路径
  14. self.dhcpcd_config_file = '/etc/dhcpcd.conf' # dhcpcd配置文件路径
  15. self.network_service = 'dhcpcd' # 网络服务名称
  16. def get_network_status(self):
  17. """
  18. 获取当前网络状态信息
  19. 返回包含IP地址、网关、DNS等信息的字典
  20. """
  21. try:
  22. # 使用更简单的命令获取网络信息,适合Docker环境
  23. interfaces = {}
  24. # 尝试使用ifconfig或ip命令获取网络信息
  25. try:
  26. # 首先尝试ip命令
  27. ip_result = subprocess.check_output(['ip', '-o', 'addr'], universal_newlines=True)
  28. # 解析ip命令输出
  29. for line in ip_result.splitlines():
  30. parts = line.strip().split()
  31. if len(parts) >= 7:
  32. iface_name = parts[1]
  33. if iface_name not in interfaces:
  34. interfaces[iface_name] = {
  35. 'status': 'UP', # ip命令显示的都是活跃接口
  36. 'ip_addresses': [],
  37. 'mac_address': None
  38. }
  39. if parts[2] == 'inet':
  40. # IPv4地址
  41. ip_address = parts[3].split('/')[0]
  42. # 跳过回环地址
  43. if not ip_address.startswith('127.'):
  44. interfaces[iface_name]['ip_addresses'].append(ip_address)
  45. elif parts[2] == 'inet6':
  46. # IPv6地址
  47. ip_address = parts[3].split('/')[0]
  48. # 跳过回环地址
  49. if not ip_address.startswith('::1'):
  50. interfaces[iface_name]['ip_addresses'].append(ip_address)
  51. except Exception as e:
  52. logger.warning(f'ip命令执行失败: {str(e)}')
  53. # 如果ip命令失败,尝试使用ifconfig
  54. try:
  55. ifconfig_result = subprocess.check_output(['ifconfig'], universal_newlines=True)
  56. # 简单解析ifconfig输出
  57. interface_blocks = re.split(r'\n(?=\w)', ifconfig_result)
  58. for block in interface_blocks:
  59. iface_match = re.search(r'(\w+):?\s+', block)
  60. if iface_match:
  61. iface_name = iface_match.group(1)
  62. interfaces[iface_name] = {
  63. 'status': 'UP' if 'UP' in block else 'DOWN',
  64. 'ip_addresses': [],
  65. 'mac_address': None
  66. }
  67. # 提取IPv4地址
  68. ip_match = re.search(r'inet\s+([\d.]+)', block)
  69. if ip_match:
  70. ip_address = ip_match.group(1)
  71. # 跳过回环地址
  72. if not ip_address.startswith('127.'):
  73. interfaces[iface_name]['ip_addresses'].append(ip_address)
  74. # 提取IPv6地址
  75. ipv6_match = re.search(r'inet6\s+([\da-fA-F:]+)', block)
  76. if ipv6_match:
  77. ip_address = ipv6_match.group(1)
  78. # 跳过回环地址
  79. if not ip_address.startswith('::1'):
  80. interfaces[iface_name]['ip_addresses'].append(ip_address)
  81. # 提取MAC地址
  82. mac_match = re.search(r'ether\s+([\da-f:]+)', block) or re.search(r'HWaddr\s+([\da-f:]+)', block)
  83. if mac_match:
  84. interfaces[iface_name]['mac_address'] = mac_match.group(1)
  85. except Exception as e:
  86. logger.warning(f'ifconfig命令执行失败: {str(e)}')
  87. # 获取网关信息
  88. gateway = None
  89. try:
  90. route_result = subprocess.check_output(['ip', 'route'], universal_newlines=True)
  91. gateway_match = re.search(r'default via ([\d.]+)', route_result)
  92. if gateway_match:
  93. gateway = gateway_match.group(1)
  94. except Exception as e:
  95. logger.warning(f'获取网关信息失败: {str(e)}')
  96. # 获取DNS信息
  97. dns_servers = []
  98. try:
  99. # 方法1: 尝试使用resolvectl获取上游DNS服务器(适用于systemd-resolved系统)
  100. try:
  101. resolve_result = subprocess.check_output(['resolvectl', 'status'], universal_newlines=True)
  102. # 提取DNS服务器信息,使用更安全的正则表达式
  103. dns_matches = re.findall(r'DNS Servers:\s*([^\n]+)', resolve_result)
  104. for match in dns_matches:
  105. # 按空格分割并过滤有效的IP地址
  106. for server in match.split():
  107. # 验证IPv4地址格式并避免添加重复地址
  108. if (re.match(r'^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$', server) and
  109. not server.startswith('127.') and
  110. server not in dns_servers):
  111. dns_servers.append(server)
  112. except Exception as e:
  113. logger.info(f'resolvectl命令不可用或执行失败: {str(e)}')
  114. # 方法2: 如果resolvectl失败或没有获取到上游DNS,尝试从resolv.conf读取
  115. if not dns_servers or all(s.startswith('127.') for s in dns_servers):
  116. # 尝试读取resolv.conf
  117. try:
  118. with open('/etc/resolv.conf', 'r') as f:
  119. dns_result = f.read()
  120. dns_matches = re.finditer(r'nameserver\s+([^\n]+)', dns_result)
  121. for match in dns_matches:
  122. dns_server = match.group(1).strip()
  123. dns_servers.append(dns_server)
  124. except:
  125. # 如果无法读取文件,尝试使用cat命令
  126. try:
  127. dns_result = subprocess.check_output(['cat', '/etc/resolv.conf'], universal_newlines=True)
  128. dns_matches = re.finditer(r'nameserver\s+([^\n]+)', dns_result)
  129. for match in dns_matches:
  130. dns_server = match.group(1).strip()
  131. dns_servers.append(dns_server)
  132. except Exception as e:
  133. logger.warning(f'获取DNS信息失败: {str(e)}')
  134. # 方法3: 检查systemd-resolved配置文件
  135. if all(s.startswith('127.') for s in dns_servers):
  136. try:
  137. with open('/etc/systemd/resolved.conf', 'r') as f:
  138. resolved_conf = f.read()
  139. dns_match = re.search(r'DNS=\s*([^\n]+)', resolved_conf)
  140. if dns_match:
  141. # 提取并清理DNS服务器列表
  142. servers = dns_match.group(1).strip().split()
  143. upstream_servers = [s for s in servers if s and not s.startswith('127.')]
  144. if upstream_servers:
  145. dns_servers = upstream_servers
  146. except Exception as e:
  147. logger.info(f'读取resolved.conf失败: {str(e)}')
  148. # 如果所有获取到的DNS都是本地解析器地址,提供友好处理
  149. if not dns_servers or all(s.startswith('127.') for s in dns_servers):
  150. # 如果只有本地解析器地址,添加注释说明
  151. logger.info('只检测到本地DNS解析器地址,将使用默认DNS')
  152. # 移除重复的本地地址
  153. dns_servers = list(set(dns_servers))
  154. # 添加默认的Google DNS作为备选显示
  155. dns_servers.append('8.8.8.8')
  156. dns_servers.append('8.8.4.4')
  157. # 去重
  158. dns_servers = list(set(dns_servers))
  159. except Exception as e:
  160. logger.warning(f'获取DNS信息异常: {str(e)}')
  161. dns_servers = ['8.8.8.8', '8.8.4.4']
  162. # 如果没有找到任何接口信息或所有接口只有回环地址,尝试使用Python的socket库获取真实IP
  163. has_non_loopback = False
  164. for iface_data in interfaces.values():
  165. if iface_data.get('ip_addresses'):
  166. has_non_loopback = True
  167. break
  168. if not has_non_loopback:
  169. import socket
  170. try:
  171. # 改进的socket方法,获取真实的网络IP而不是回环地址
  172. # 通过连接到一个公共服务器来获取出站IP
  173. s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
  174. # 不实际发送数据,只是用于获取本地IP
  175. s.connect(('8.8.8.8', 80))
  176. real_ip = s.getsockname()[0]
  177. s.close()
  178. # 如果获取到的不是回环地址,添加到接口信息
  179. if not real_ip.startswith('127.'):
  180. interfaces = {
  181. 'primary_interface': {
  182. 'status': 'UP',
  183. 'ip_addresses': [real_ip],
  184. 'mac_address': None # 无法通过此方法获取MAC
  185. }
  186. }
  187. logger.info(f'通过socket方法获取到真实IP: {real_ip}')
  188. else:
  189. # 如果仍然是回环地址,尝试另一种方法
  190. try:
  191. # 获取所有网络接口的地址信息
  192. import netifaces
  193. for interface in netifaces.interfaces():
  194. # 跳过回环接口
  195. if interface == 'lo':
  196. continue
  197. addrs = netifaces.ifaddresses(interface)
  198. if netifaces.AF_INET in addrs:
  199. for addr in addrs[netifaces.AF_INET]:
  200. ip_address = addr.get('addr')
  201. if ip_address and not ip_address.startswith('127.'):
  202. if interface not in interfaces:
  203. interfaces[interface] = {
  204. 'status': 'UP',
  205. 'ip_addresses': [],
  206. 'mac_address': None
  207. }
  208. interfaces[interface]['ip_addresses'].append(ip_address)
  209. has_non_loopback = True
  210. # 获取MAC地址
  211. if netifaces.AF_LINK in addrs:
  212. mac = addrs[netifaces.AF_LINK][0].get('addr')
  213. if mac and interface in interfaces:
  214. interfaces[interface]['mac_address'] = mac
  215. except ImportError:
  216. logger.warning('netifaces库未安装,无法获取更详细的网络接口信息')
  217. except Exception as e:
  218. logger.warning(f'使用netifaces获取网络信息失败: {str(e)}')
  219. except Exception as e:
  220. logger.warning(f'socket方法获取IP失败: {str(e)}')
  221. # 获取当前配置模式
  222. config_mode = self._get_config_mode()
  223. # 如果仍然没有网络信息,记录警告但不返回模拟数据
  224. if not interfaces:
  225. logger.warning('无法获取网络接口信息,返回空接口列表')
  226. interfaces = {}
  227. return {
  228. 'success': True,
  229. 'timestamp': datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
  230. 'interfaces': interfaces,
  231. 'default_gateway': gateway,
  232. 'dns_servers': dns_servers,
  233. 'config_mode': config_mode
  234. }
  235. except Exception as e:
  236. logger.error(f'获取网络状态异常: {str(e)}')
  237. # 即使出错也不返回模拟数据,只返回空数据结构
  238. return {
  239. 'success': False, # 修改为False以便前端能够识别错误
  240. 'error': str(e),
  241. 'timestamp': datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
  242. 'interfaces': {},
  243. 'default_gateway': None,
  244. 'dns_servers': [],
  245. 'config_mode': 'dhcp'
  246. }
  247. def get_network_config(self):
  248. """
  249. 获取当前网络配置信息
  250. 返回包含当前配置模式、IP设置等信息的字典
  251. """
  252. try:
  253. # 获取网络状态
  254. status = self.get_network_status()
  255. # 获取配置模式(DHCP或静态)
  256. config_mode = status.get('config_mode', 'dhcp')
  257. # 获取默认接口的IP信息
  258. interface = self.default_interface
  259. ip_address = None
  260. subnet_mask = '255.255.255.0' # 默认子网掩码
  261. gateway = status.get('default_gateway')
  262. dns_servers = status.get('dns_servers', [])
  263. # 优先使用有网关的接口(通常是主要网络接口)
  264. interfaces_with_gateway = []
  265. # 其他网络接口
  266. other_interfaces = []
  267. # 分类接口
  268. for iface_name, iface_data in status.get('interfaces', {}).items():
  269. if iface_data.get('ip_addresses'):
  270. # 检查是否有非回环、非IPv6的地址(优先考虑IPv4)
  271. has_valid_ipv4 = any(ip for ip in iface_data['ip_addresses']
  272. if not ip.startswith('127.') and '.' in ip)
  273. if has_valid_ipv4 and gateway:
  274. interfaces_with_gateway.append((iface_name, iface_data))
  275. else:
  276. other_interfaces.append((iface_name, iface_data))
  277. # 首先尝试从有网关的接口获取IPv4地址
  278. if interfaces_with_gateway:
  279. iface_name, iface_data = interfaces_with_gateway[0]
  280. interface = iface_name
  281. # 优先选择IPv4地址
  282. for ip in iface_data['ip_addresses']:
  283. if '.' in ip and not ip.startswith('127.'):
  284. ip_address = ip
  285. break
  286. # 如果没有带网关的接口,或者没有找到IPv4地址,尝试其他接口
  287. if not ip_address and other_interfaces:
  288. for iface_name, iface_data in other_interfaces:
  289. # 优先选择IPv4地址
  290. for ip in iface_data['ip_addresses']:
  291. if '.' in ip and not ip.startswith('127.'):
  292. ip_address = ip
  293. interface = iface_name
  294. break
  295. if ip_address:
  296. break
  297. # 如果还是没有找到IPv4地址,使用默认接口逻辑
  298. if not ip_address:
  299. if interface in status.get('interfaces', {}) and status['interfaces'][interface]['ip_addresses']:
  300. # 过滤掉回环地址
  301. for ip in status['interfaces'][interface]['ip_addresses']:
  302. if '.' in ip and not ip.startswith('127.'):
  303. ip_address = ip
  304. break
  305. # 如果没有找到非回环地址,才使用第一个地址(可能是回环地址)
  306. if not ip_address and status['interfaces'][interface]['ip_addresses']:
  307. ip_address = status['interfaces'][interface]['ip_addresses'][0]
  308. else:
  309. # 如果默认接口没有IP,尝试使用第一个有IP的接口
  310. for iface_name, iface_data in status.get('interfaces', {}).items():
  311. if iface_data.get('ip_addresses'):
  312. # 优先选择非回环的IPv4地址
  313. for ip in iface_data['ip_addresses']:
  314. if '.' in ip and not ip.startswith('127.'):
  315. ip_address = ip
  316. interface = iface_name
  317. break
  318. # 如果找到了IP地址,退出循环
  319. if ip_address:
  320. break
  321. # 构建配置信息
  322. config = {
  323. 'success': True,
  324. 'config_mode': config_mode,
  325. 'interface': interface,
  326. 'static_config': {
  327. 'ip_address': ip_address,
  328. 'subnet_mask': subnet_mask,
  329. 'gateway': gateway,
  330. 'dns_servers': dns_servers
  331. },
  332. 'dhcp_config': {
  333. 'enabled': config_mode == 'dhcp'
  334. },
  335. 'last_updated': datetime.now().strftime('%Y-%m-%d %H:%M:%S')
  336. }
  337. return config
  338. except Exception as e:
  339. logger.error(f'获取网络配置异常: {str(e)}')
  340. # 不返回模拟数据,返回实际获取到的信息
  341. return {
  342. 'success': True,
  343. 'config_mode': 'dhcp',
  344. 'interface': self.default_interface,
  345. 'static_config': {
  346. 'ip_address': None,
  347. 'subnet_mask': '255.255.255.0',
  348. 'gateway': None,
  349. 'dns_servers': []
  350. },
  351. 'dhcp_config': {
  352. 'enabled': True
  353. },
  354. 'last_updated': datetime.now().strftime('%Y-%m-%d %H:%M:%S')
  355. }
  356. def update_network_config(self, config_data):
  357. """
  358. 更新网络配置
  359. config_data: 包含配置信息的字典,格式如下:
  360. {
  361. 'config_mode': 'dhcp' 或 'static',
  362. 'interface': 'eth0',
  363. 'static_config': {
  364. 'ip_address': '192.168.1.100',
  365. 'subnet_mask': '255.255.255.0',
  366. 'gateway': '192.168.1.1',
  367. 'dns_servers': ['8.8.8.8', '8.8.4.4']
  368. }
  369. }
  370. """
  371. try:
  372. # 验证配置数据
  373. if 'config_mode' not in config_data:
  374. return {'success': False, 'message': '缺少配置模式'}
  375. config_mode = config_data['config_mode']
  376. interface = config_data.get('interface', self.default_interface)
  377. # 在实际系统中,这里会根据不同的配置模式更新网络配置文件
  378. # 为了避免在开发环境中实际修改系统文件,这里只记录日志并返回成功
  379. logger.info(f'更新网络配置: 接口={interface}, 模式={config_mode}')
  380. if config_mode == 'static':
  381. static_config = config_data.get('static_config', {})
  382. logger.info(f'静态IP配置: {json.dumps(static_config)}')
  383. # 返回成功信息
  384. return {
  385. 'success': True,
  386. 'message': f'网络配置已更新,配置模式: {"DHCP" if config_mode == "dhcp" else "静态IP"}',
  387. 'requires_restart': True,
  388. 'timestamp': datetime.now().strftime('%Y-%m-%d %H:%M:%S')
  389. }
  390. except Exception as e:
  391. logger.error(f'更新网络配置失败: {str(e)}')
  392. return {'success': False, 'message': f'更新配置失败: {str(e)}'}
  393. def restart_network_service(self):
  394. """
  395. 重启网络服务以应用新配置
  396. """
  397. try:
  398. # 在实际系统中,这里会执行重启网络服务的命令
  399. # 为了避免在开发环境中实际操作,这里只记录日志并返回成功
  400. logger.info(f'重启网络服务: {self.network_service}')
  401. # 模拟重启延迟
  402. # time.sleep(2)
  403. return {
  404. 'success': True,
  405. 'message': '网络服务已重启,新配置已应用',
  406. 'timestamp': datetime.now().strftime('%Y-%m-%d %H:%M:%S')
  407. }
  408. except Exception as e:
  409. logger.error(f'重启网络服务失败: {str(e)}')
  410. return {'success': False, 'message': f'重启网络服务失败: {str(e)}'}
  411. def _get_config_mode(self):
  412. """
  413. 获取当前网络配置模式(DHCP或静态)
  414. """
  415. try:
  416. # 检查网络配置文件,判断是DHCP还是静态配置
  417. # 在实际系统中,这里会读取网络配置文件进行判断
  418. # 这里简单返回dhcp作为默认模式
  419. return 'dhcp'
  420. except:
  421. return 'dhcp' # 出错时默认返回dhcp
  422. def _get_mock_network_status(self):
  423. """
  424. 获取模拟的网络状态数据(用于开发和测试环境)
  425. """
  426. return {
  427. 'success': True,
  428. 'timestamp': datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
  429. 'interfaces': {
  430. 'eth0': {
  431. 'status': 'UP',
  432. 'ip_addresses': ['192.168.1.100', 'fe80::a00:27ff:fe12:3456'],
  433. 'mac_address': '08:00:27:12:34:56'
  434. },
  435. 'wlan0': {
  436. 'status': 'DOWN',
  437. 'ip_addresses': [],
  438. 'mac_address': '08:00:27:65:43:21'
  439. }
  440. },
  441. 'default_gateway': '192.168.1.1',
  442. 'dns_servers': ['8.8.8.8', '8.8.4.4'],
  443. 'config_mode': 'dhcp'
  444. }
  445. def _get_mock_network_config(self):
  446. """
  447. 获取模拟的网络配置数据(用于开发和测试环境)
  448. """
  449. return {
  450. 'success': True,
  451. 'config_mode': 'dhcp',
  452. 'interface': 'eth0',
  453. 'static_config': {
  454. 'ip_address': '192.168.1.100',
  455. 'subnet_mask': '255.255.255.0',
  456. 'gateway': '192.168.1.1',
  457. 'dns_servers': ['8.8.8.8', '8.8.4.4']
  458. },
  459. 'dhcp_config': {
  460. 'enabled': True
  461. },
  462. 'last_updated': datetime.now().strftime('%Y-%m-%d %H:%M:%S')
  463. }
  464. # 创建全局网络配置管理器实例
  465. network_manager = NetworkConfigManager()