如何列出iOS 4中的TCP/UDP连接

   struct ifaddrs *interfaces = NULL;

   struct ifaddrs *temp_addr = NULL;

   // 获取所有网络接口

   if (getifaddrs(&interfaces) == 0) {

       temp_addr = interfaces;

       // 遍历所有网络接口

       while (temp_addr != NULL) {

           if (temp_addr->ifa_addr->sa_family == AF_INET || temp_addr->ifa_addr->sa_family == AF_INET6) {

               // 获取接口名称

               NSString *interfaceName = [NSString stringWithUTF8String:temp_addr->ifa_name];

               // 排除回环接口

               if (![interfaceName isEqualToString:@"lo0"]) {

                   // 获取接口地址

                   NSString *interfaceAddress = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];

                   // 获取接口子网掩码

                   NSString *interfaceNetmask = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_netmask)->sin_addr)];

                   // 获取接口广播地址

                   NSString *interfaceBroadcast = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_dstaddr)->sin_addr)];

                   // 获取接口描述信息

                   NSString *interfaceDescription = [NSString stringWithUTF8String:temp_addr->ifa_name];

                   // 获取接口索引

                   NSInteger interfaceIndex = if_nametoindex(temp_addr->ifa_name);

                   // 获取接口类型

                   NSString *interfaceType = [NSString stringWithUTF8String:(temp_addr->ifa_addr->sa_family == AF_INET) ? "IPv4" : "IPv6"];

                   // 将接口信息添加到数组中

                   NSDictionary *connection = @{

                       @"InterfaceName": interfaceName,

                       @"InterfaceAddress": interfaceAddress,

                       @"InterfaceNetmask": interfaceNetmask,

                       @"InterfaceBroadcast": interfaceBroadcast,

                       @"InterfaceDescription": interfaceDescription,

                       @"InterfaceIndex": @(interfaceIndex),

                       @"InterfaceType": interfaceType

                   };

                   [connections addObject:connection];

               }

           }

           temp_addr = temp_addr->ifa_next;

       }

   }

   // 释放资源

   freeifaddrs(interfaces);

   return connections;