Linux 试图读取iw_统计数据,但代码无法工作?
我需要从iw_统计结构中读取某些统计信息,以下是代码:Linux 试图读取iw_统计数据,但代码无法工作?,linux,wireless,linux-kernel,c,Linux,Wireless,Linux Kernel,C,我需要从iw_统计结构中读取某些统计信息,以下是代码: struct net_device *dev; struct iw_statistics *wi_stats; dev = first_net_device(&init_net); while (dev) { if (strncmp(dev->name , "wlan",4)==0 ) { if (dev->wireless_handlers->get_wir
struct net_device *dev;
struct iw_statistics *wi_stats;
dev = first_net_device(&init_net);
while (dev)
{
if (strncmp(dev->name , "wlan",4)==0 )
{
if (dev->wireless_handlers->get_wireless_stats(dev) !=NULL ) // <--- here's where the code crashes.
{
wi_stats = dev-wireless_handlers->get_wireless_stats(dev);
printk(KERN_INFO "wi_stats = dev-wireless_handlers->get_wireless_stats(dev); worked!!! :D\n");
}
}
}
struct net\u设备*dev;
结构iw_统计*wi_统计;
dev=第一个网络设备(&init网络);
while(dev)
{
如果(strncmp(dev->name,“wlan”,4)==0)
{
if(dev->wireless\u handlers->get\u wireless\u stats(dev)!=NULL)//您应该检查dev->wireless\u handlers是否不为null。您可以粘贴实际的代码片段吗?出现了什么错误?看起来像wireless\u handlers
struct是null
…仅仅因为网络设备填充了name
字段并不意味着它已配置
这是设置wireless\u handlers
的地方:
#ifdef CONFIG_WIRELESS_EXT
/* List of functions to handle Wireless Extensions (instead of ioctl).
* See <net/iw_handler.h> for details. Jean II */
const struct iw_handler_def * wireless_handlers;
/* Instance data managed by the core of Wireless Extensions. */
struct iw_public_data * wireless_data;
#endif
#ifdef配置(无线)扩展
/*处理无线扩展(而不是ioctl)的函数列表。
*详情见*/
const struct iw_handler_def*无线处理程序;
/*由无线扩展核心管理的实例数据*/
结构iw_公共_数据*无线_数据;
#恩迪夫
您应该检查名为CONFIG\u WIRELESS\u EXT
的值。如果未设置该值,则未设置WIRELESS\u handler
结构,因此您将指向一个Null
,您的模块将被卡住