wifi,网关相关标识的获取

获取WIFI的相关信息
<pre>

• (void)getWifiInfo
  {
  NSArray *ifs = (__bridge_transfer NSArray *)CNCopySupportedInterfaces();
  if (!ifs) {
  return ;
  }
  NSDictionary *info = nil;
  for (NSString *ifnam in ifs) {
  info = (__bridge_transfer NSDictionary *)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifnam);
  if (info && [info count]) {
  break;
  }
  }
  NSLog(@"WIFI名称 %@ MAC地址 %@",info[@"SSID"],info[@"BSSID"]);
  }
  </pre>

获取WIFI网关以及子网掩码，端口等信息
<pre>

• (NSMutableDictionary *)getLocalInfoForCurrentWiFi {
  NSMutableDictionary *dict = [NSMutableDictionary dictionary];
  struct ifaddrs *interfaces = NULL;
  struct ifaddrs temp_addr = NULL;
  int success = 0;
  // retrieve the current interfaces - returns 0 on success
  success = getifaddrs(&interfaces);
  if (success == 0) {
  // Loop through linked list of interfaces
  temp_addr = interfaces;
  ///
  while(temp_addr != NULL) {
  if(temp_addr->ifa_addr->sa_family == AF_INET) {
  // Check if interface is en0 which is the wifi connection on the iPhone
  if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {
  //----192.168.1.255 广播地址
  NSString *broadcast = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_dstaddr)->sin_addr)];
  if (broadcast) {
  [dict setObject:broadcast forKey:@"broadcast"];
  }
  NSLog(@"broadcast address--%@",broadcast);
  //--192.168.1.106 本机地址
  NSString *localIp = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
  if (localIp) {
  [dict setObject:localIp forKey:@"localIp"];
  }
  NSLog(@"local device ip--%@",localIp);
  //--255.255.255.0 子网掩码地址
  NSString *netmask = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_netmask)->sin_addr)];
  if (netmask) {
  [dict setObject:netmask forKey:@"netmask"];
  }
  NSLog(@"netmask--%@",netmask);
  //--en0 端口地址
  NSString *interface = [NSString stringWithUTF8String:temp_addr->ifa_name];
  if (interface) {
  [dict setObject:interface forKey:@"interface"];
  }
  NSLog(@"interface--%@",interface);
  return dict;
  }
  }
  temp_addr = temp_addr->ifa_next;
  }
  }
  // Free memory
  freeifaddrs(interfaces);
  return dict;
  }
  </pre>