network_config.py 25 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. ip_result = subprocess.check_output(['ip', '-o', 'addr'], universal_newlines=True)
  27. for line in ip_result.splitlines():
  28. parts = line.strip().split()
  29. if len(parts) >= 7:
  30. iface_name = parts[1]
  31. if iface_name not in interfaces:
  32. interfaces[iface_name] = {
  33. 'status': 'UP',
  34. 'ip_addresses': [],
  35. 'mac_address': None
  36. }
  37. if parts[2] == 'inet':
  38. ip_address = parts[3].split('/')[0]
  39. if not ip_address.startswith('127.'):
  40. interfaces[iface_name]['ip_addresses'].append(ip_address)
  41. elif parts[2] == 'inet6':
  42. ip_address = parts[3].split('/')[0]
  43. if not ip_address.startswith('::1'):
  44. interfaces[iface_name]['ip_addresses'].append(ip_address)
  45. try:
  46. link_result = subprocess.check_output(['ip', '-o', 'link'], universal_newlines=True)
  47. for line in link_result.splitlines():
  48. parts = line.strip().split()
  49. if len(parts) >= 2:
  50. iface_name = parts[1].rstrip(':')
  51. if iface_name in interfaces:
  52. for i, p in enumerate(parts):
  53. if p == 'link/ether' and i + 1 < len(parts):
  54. interfaces[iface_name]['mac_address'] = parts[i + 1].rstrip(',')
  55. break
  56. except Exception:
  57. pass
  58. except Exception as e:
  59. logger.warning(f'ip命令执行失败: {str(e)}')
  60. # 如果ip命令失败,尝试使用ifconfig
  61. try:
  62. ifconfig_result = subprocess.check_output(['ifconfig'], universal_newlines=True)
  63. # 简单解析ifconfig输出
  64. interface_blocks = re.split(r'\n(?=\w)', ifconfig_result)
  65. for block in interface_blocks:
  66. iface_match = re.search(r'(\w+):?\s+', block)
  67. if iface_match:
  68. iface_name = iface_match.group(1)
  69. interfaces[iface_name] = {
  70. 'status': 'UP' if 'UP' in block else 'DOWN',
  71. 'ip_addresses': [],
  72. 'mac_address': None
  73. }
  74. # 提取IPv4地址
  75. ip_match = re.search(r'inet\s+([\d.]+)', block)
  76. if ip_match:
  77. ip_address = ip_match.group(1)
  78. # 跳过回环地址
  79. if not ip_address.startswith('127.'):
  80. interfaces[iface_name]['ip_addresses'].append(ip_address)
  81. # 提取IPv6地址
  82. ipv6_match = re.search(r'inet6\s+([\da-fA-F:]+)', block)
  83. if ipv6_match:
  84. ip_address = ipv6_match.group(1)
  85. # 跳过回环地址
  86. if not ip_address.startswith('::1'):
  87. interfaces[iface_name]['ip_addresses'].append(ip_address)
  88. # 提取MAC地址
  89. mac_match = re.search(r'ether\s+([\da-f:]+)', block) or re.search(r'HWaddr\s+([\da-f:]+)', block)
  90. if mac_match:
  91. interfaces[iface_name]['mac_address'] = mac_match.group(1)
  92. except Exception as e:
  93. logger.warning(f'ifconfig命令执行失败: {str(e)}')
  94. # 获取网关信息
  95. gateway = None
  96. try:
  97. route_result = subprocess.check_output(['ip', 'route'], universal_newlines=True)
  98. gateway_match = re.search(r'default via ([\d.]+)', route_result)
  99. if gateway_match:
  100. gateway = gateway_match.group(1)
  101. except Exception as e:
  102. logger.warning(f'获取网关信息失败: {str(e)}')
  103. # 获取DNS信息
  104. dns_servers = []
  105. try:
  106. # 方法1: 尝试使用resolvectl获取上游DNS服务器(适用于systemd-resolved系统)
  107. try:
  108. resolve_result = subprocess.check_output(['resolvectl', 'status'], universal_newlines=True)
  109. # 提取DNS服务器信息,使用更安全的正则表达式
  110. dns_matches = re.findall(r'DNS Servers:\s*([^\n]+)', resolve_result)
  111. for match in dns_matches:
  112. # 按空格分割并过滤有效的IP地址
  113. for server in match.split():
  114. # 验证IPv4地址格式并避免添加重复地址
  115. if (re.match(r'^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$', server) and
  116. not server.startswith('127.') and
  117. server not in dns_servers):
  118. dns_servers.append(server)
  119. except Exception as e:
  120. logger.info(f'resolvectl命令不可用或执行失败: {str(e)}')
  121. # 方法2: 如果resolvectl失败或没有获取到上游DNS,尝试从resolv.conf读取
  122. if not dns_servers or all(s.startswith('127.') for s in dns_servers):
  123. # 尝试读取resolv.conf
  124. try:
  125. with open('/etc/resolv.conf', 'r') as f:
  126. dns_result = f.read()
  127. dns_matches = re.finditer(r'nameserver\s+([^\n]+)', dns_result)
  128. for match in dns_matches:
  129. dns_server = match.group(1).strip()
  130. dns_servers.append(dns_server)
  131. except:
  132. # 如果无法读取文件,尝试使用cat命令
  133. try:
  134. dns_result = subprocess.check_output(['cat', '/etc/resolv.conf'], universal_newlines=True)
  135. dns_matches = re.finditer(r'nameserver\s+([^\n]+)', dns_result)
  136. for match in dns_matches:
  137. dns_server = match.group(1).strip()
  138. dns_servers.append(dns_server)
  139. except Exception as e:
  140. logger.warning(f'获取DNS信息失败: {str(e)}')
  141. # 方法3: 检查systemd-resolved配置文件
  142. if all(s.startswith('127.') for s in dns_servers):
  143. try:
  144. with open('/etc/systemd/resolved.conf', 'r') as f:
  145. resolved_conf = f.read()
  146. dns_match = re.search(r'DNS=\s*([^\n]+)', resolved_conf)
  147. if dns_match:
  148. # 提取并清理DNS服务器列表
  149. servers = dns_match.group(1).strip().split()
  150. upstream_servers = [s for s in servers if s and not s.startswith('127.')]
  151. if upstream_servers:
  152. dns_servers = upstream_servers
  153. except Exception as e:
  154. logger.info(f'读取resolved.conf失败: {str(e)}')
  155. # 如果所有获取到的DNS都是本地解析器地址,提供友好处理
  156. if not dns_servers or all(s.startswith('127.') for s in dns_servers):
  157. # 如果只有本地解析器地址,添加注释说明
  158. logger.info('只检测到本地DNS解析器地址,将使用默认DNS')
  159. # 移除重复的本地地址
  160. dns_servers = list(set(dns_servers))
  161. # 添加默认的Google DNS作为备选显示
  162. dns_servers.append('8.8.8.8')
  163. dns_servers.append('8.8.4.4')
  164. # 去重
  165. dns_servers = list(set(dns_servers))
  166. except Exception as e:
  167. logger.warning(f'获取DNS信息异常: {str(e)}')
  168. dns_servers = ['8.8.8.8', '8.8.4.4']
  169. # 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
  170. has_non_loopback = False
  171. for iface_data in interfaces.values():
  172. if iface_data.get('ip_addresses'):
  173. has_non_loopback = True
  174. break
  175. if not has_non_loopback:
  176. import socket
  177. try:
  178. # 改进的socket方法,获取真实的网络IP而不是回环地址
  179. # 通过连接到一个公共服务器来获取出站IP
  180. s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
  181. # 不实际发送数据,只是用于获取本地IP
  182. s.connect(('8.8.8.8', 80))
  183. real_ip = s.getsockname()[0]
  184. s.close()
  185. # 如果获取到的不是回环地址,添加到接口信息
  186. if not real_ip.startswith('127.'):
  187. interfaces = {
  188. 'primary_interface': {
  189. 'status': 'UP',
  190. 'ip_addresses': [real_ip],
  191. 'mac_address': None # 无法通过此方法获取MAC
  192. }
  193. }
  194. logger.info(f'通过socket方法获取到真实IP: {real_ip}')
  195. else:
  196. # 如果仍然是回环地址,尝试另一种方法
  197. try:
  198. # 获取所有网络接口的地址信息
  199. import netifaces
  200. for interface in netifaces.interfaces():
  201. # 跳过回环接口
  202. if interface == 'lo':
  203. continue
  204. addrs = netifaces.ifaddresses(interface)
  205. if netifaces.AF_INET in addrs:
  206. for addr in addrs[netifaces.AF_INET]:
  207. ip_address = addr.get('addr')
  208. if ip_address and not ip_address.startswith('127.'):
  209. if interface not in interfaces:
  210. interfaces[interface] = {
  211. 'status': 'UP',
  212. 'ip_addresses': [],
  213. 'mac_address': None
  214. }
  215. interfaces[interface]['ip_addresses'].append(ip_address)
  216. has_non_loopback = True
  217. # 获取MAC地址
  218. if netifaces.AF_LINK in addrs:
  219. mac = addrs[netifaces.AF_LINK][0].get('addr')
  220. if mac and interface in interfaces:
  221. interfaces[interface]['mac_address'] = mac
  222. except ImportError:
  223. logger.warning('netifaces库未安装,无法获取更详细的网络接口信息')
  224. except Exception as e:
  225. logger.warning(f'使用netifaces获取网络信息失败: {str(e)}')
  226. except Exception as e:
  227. logger.warning(f'socket方法获取IP失败: {str(e)}')
  228. # 获取当前配置模式
  229. config_mode = self._get_config_mode()
  230. # 如果仍然没有网络信息,记录警告但不返回模拟数据
  231. if not interfaces:
  232. logger.warning('无法获取网络接口信息,返回空接口列表')
  233. interfaces = {}
  234. return {
  235. 'success': True,
  236. 'timestamp': datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
  237. 'interfaces': interfaces,
  238. 'default_gateway': gateway,
  239. 'dns_servers': dns_servers,
  240. 'config_mode': config_mode
  241. }
  242. except Exception as e:
  243. logger.error(f'获取网络状态异常: {str(e)}')
  244. # 即使出错也不返回模拟数据,只返回空数据结构
  245. return {
  246. 'success': False, # 修改为False以便前端能够识别错误
  247. 'error': str(e),
  248. 'timestamp': datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
  249. 'interfaces': {},
  250. 'default_gateway': None,
  251. 'dns_servers': [],
  252. 'config_mode': 'dhcp'
  253. }
  254. def get_network_config(self):
  255. """
  256. 获取当前网络配置信息
  257. 返回包含当前配置模式、IP设置等信息的字典
  258. """
  259. try:
  260. # 获取网络状态
  261. status = self.get_network_status()
  262. # 获取配置模式(DHCP或静态)
  263. config_mode = status.get('config_mode', 'dhcp')
  264. # 获取默认接口的IP信息
  265. interface = self.default_interface
  266. ip_address = None
  267. subnet_mask = '255.255.255.0' # 默认子网掩码
  268. gateway = status.get('default_gateway')
  269. dns_servers = status.get('dns_servers', [])
  270. # 优先使用有网关的接口(通常是主要网络接口)
  271. interfaces_with_gateway = []
  272. # 其他网络接口
  273. other_interfaces = []
  274. # 分类接口
  275. for iface_name, iface_data in status.get('interfaces', {}).items():
  276. if iface_data.get('ip_addresses'):
  277. # 检查是否有非回环、非IPv6的地址(优先考虑IPv4)
  278. has_valid_ipv4 = any(ip for ip in iface_data['ip_addresses']
  279. if not ip.startswith('127.') and '.' in ip)
  280. if has_valid_ipv4 and gateway:
  281. interfaces_with_gateway.append((iface_name, iface_data))
  282. else:
  283. other_interfaces.append((iface_name, iface_data))
  284. # 首先尝试从有网关的接口获取IPv4地址
  285. if interfaces_with_gateway:
  286. iface_name, iface_data = interfaces_with_gateway[0]
  287. interface = iface_name
  288. # 优先选择IPv4地址
  289. for ip in iface_data['ip_addresses']:
  290. if '.' in ip and not ip.startswith('127.'):
  291. ip_address = ip
  292. break
  293. # 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
  294. if not ip_address and other_interfaces:
  295. for iface_name, iface_data in other_interfaces:
  296. # 优先选择IPv4地址
  297. for ip in iface_data['ip_addresses']:
  298. if '.' in ip and not ip.startswith('127.'):
  299. ip_address = ip
  300. interface = iface_name
  301. break
  302. if ip_address:
  303. break
  304. # 如果还是没有找到IPv4地址,使用默认接口逻辑
  305. if not ip_address:
  306. if interface in status.get('interfaces', {}) and status['interfaces'][interface]['ip_addresses']:
  307. # 过滤掉回环地址
  308. for ip in status['interfaces'][interface]['ip_addresses']:
  309. if '.' in ip and not ip.startswith('127.'):
  310. ip_address = ip
  311. break
  312. # 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)
  313. if not ip_address and status['interfaces'][interface]['ip_addresses']:
  314. ip_address = status['interfaces'][interface]['ip_addresses'][0]
  315. else:
  316. # 如果默认接口没有IP,尝试使用第一个有IP的接口
  317. for iface_name, iface_data in status.get('interfaces', {}).items():
  318. if iface_data.get('ip_addresses'):
  319. # 优先选择非回环的IPv4地址
  320. for ip in iface_data['ip_addresses']:
  321. if '.' in ip and not ip.startswith('127.'):
  322. ip_address = ip
  323. interface = iface_name
  324. break
  325. # 如果找到了IP地址,退出循环
  326. if ip_address:
  327. break
  328. # 构建配置信息
  329. config = {
  330. 'success': True,
  331. 'config_mode': config_mode,
  332. 'interface': interface,
  333. 'static_config': {
  334. 'ip_address': ip_address,
  335. 'subnet_mask': subnet_mask,
  336. 'gateway': gateway,
  337. 'dns_servers': dns_servers
  338. },
  339. 'dhcp_config': {
  340. 'enabled': config_mode == 'dhcp'
  341. },
  342. 'last_updated': datetime.now().strftime('%Y-%m-%d %H:%M:%S')
  343. }
  344. return config
  345. except Exception as e:
  346. logger.error(f'获取网络配置异常: {str(e)}')
  347. # 不返回模拟数据,返回实际获取到的信息
  348. return {
  349. 'success': True,
  350. 'config_mode': 'dhcp',
  351. 'interface': self.default_interface,
  352. 'static_config': {
  353. 'ip_address': None,
  354. 'subnet_mask': '255.255.255.0',
  355. 'gateway': None,
  356. 'dns_servers': []
  357. },
  358. 'dhcp_config': {
  359. 'enabled': True
  360. },
  361. 'last_updated': datetime.now().strftime('%Y-%m-%d %H:%M:%S')
  362. }
  363. def update_network_config(self, config_data):
  364. """
  365. 更新网络配置
  366. config_data: 包含配置信息的字典,格式如下:
  367. {
  368. 'config_mode': 'dhcp' 或 'static',
  369. 'interface': 'eth0',
  370. 'static_config': {
  371. 'ip_address': '192.168.1.100',
  372. 'subnet_mask': '255.255.255.0',
  373. 'gateway': '192.168.1.1',
  374. 'dns_servers': ['8.8.8.8', '8.8.4.4']
  375. }
  376. }
  377. """
  378. try:
  379. # 验证配置数据
  380. if 'config_mode' not in config_data:
  381. return {'success': False, 'message': '缺少配置模式'}
  382. config_mode = config_data['config_mode']
  383. interface = config_data.get('interface', self.default_interface)
  384. # 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
  385. # 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
  386. logger.info(f'更新网络配置: 接口={interface}, 模式={config_mode}')
  387. if config_mode == 'static':
  388. static_config = config_data.get('static_config', {})
  389. logger.info(f'静态IP配置: {json.dumps(static_config)}')
  390. # 返回成功信息
  391. return {
  392. 'success': True,
  393. 'message': f'网络配置已更新,配置模式: {"DHCP" if config_mode == "dhcp" else "静态IP"}',
  394. 'requires_restart': True,
  395. 'timestamp': datetime.now().strftime('%Y-%m-%d %H:%M:%S')
  396. }
  397. except Exception as e:
  398. logger.error(f'更新网络配置失败: {str(e)}')
  399. return {'success': False, 'message': f'更新配置失败: {str(e)}'}
  400. def restart_network_service(self):
  401. """
  402. 重启网络服务以应用新配置
  403. """
  404. try:
  405. # 在实际系统中,这里会执行重启网络服务的命令
  406. # 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
  407. logger.info(f'重启网络服务: {self.network_service}')
  408. # 模拟重启延迟
  409. # time.sleep(2)
  410. return {
  411. 'success': True,
  412. 'message': '网络服务已重启,新配置已应用',
  413. 'timestamp': datetime.now().strftime('%Y-%m-%d %H:%M:%S')
  414. }
  415. except Exception as e:
  416. logger.error(f'重启网络服务失败: {str(e)}')
  417. return {'success': False, 'message': f'重启网络服务失败: {str(e)}'}
  418. def _get_config_mode(self):
  419. """
  420. 获取当前网络配置模式(DHCP或静态)
  421. """
  422. try:
  423. # 检查网络配置文件,判断是DHCP还是静态配置
  424. # 在实际系统中,这里会读取网络配置文件进行判断
  425. # 这里简单返回dhcp作为默认模式
  426. return 'dhcp'
  427. except:
  428. return 'dhcp' # 出错时默认返回dhcp
  429. def _get_mock_network_status(self):
  430. """
  431. 获取模拟的网络状态数据(用于开发和测试环境)
  432. """
  433. return {
  434. 'success': True,
  435. 'timestamp': datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
  436. 'interfaces': {
  437. 'eth0': {
  438. 'status': 'UP',
  439. 'ip_addresses': ['192.168.1.100', 'fe80::a00:27ff:fe12:3456'],
  440. 'mac_address': '08:00:27:12:34:56'
  441. },
  442. 'wlan0': {
  443. 'status': 'DOWN',
  444. 'ip_addresses': [],
  445. 'mac_address': '08:00:27:65:43:21'
  446. }
  447. },
  448. 'default_gateway': '192.168.1.1',
  449. 'dns_servers': ['8.8.8.8', '8.8.4.4'],
  450. 'config_mode': 'dhcp'
  451. }
  452. def _get_mock_network_config(self):
  453. """
  454. 获取模拟的网络配置数据(用于开发和测试环境)
  455. """
  456. return {
  457. 'success': True,
  458. 'config_mode': 'dhcp',
  459. 'interface': 'eth0',
  460. 'static_config': {
  461. 'ip_address': '192.168.1.100',
  462. 'subnet_mask': '255.255.255.0',
  463. 'gateway': '192.168.1.1',
  464. 'dns_servers': ['8.8.8.8', '8.8.4.4']
  465. },
  466. 'dhcp_config': {
  467. 'enabled': True
  468. },
  469. 'last_updated': datetime.now().strftime('%Y-%m-%d %H:%M:%S')
  470. }
  471. # 创建全局网络配置管理器实例
  472. network_manager = NetworkConfigManager()