I'm writing a kernel module that needs to read the value of bitrate from this union:
union iwreq_data
{==
.......
struct iw_param bitrate; /* default bit rate */
....
}
This code is form wireless.h Does anyone know how I can access it's value?
(I'm using linux kernel 2.6.35)
There's no way to do that, unfortunately ...
taking a closer look at the iw_param struct we find
struct iw_param
{
__s32 value; /* The value of the parameter itself */
__u8 fixed; /* Hardware should not use auto select */
__u8 disabled; /* Disable the feature */
__u16 flags; /* Various specifc flags (if any) */
};
now, here's what the code looks like in wireless.h
union iwreq_data
{
/* Config - generic */
char name[IFNAMSIZ];
/* Name : used to verify the presence of wireless extensions.
* Name of the protocol/provider... */
struct iw_point essid; /* Extended network name */
struct iw_param nwid; /* network id (or domain - the cell) */
struct iw_freq freq; /* frequency or channel :
* 0-1000 = channel
* > 1000 = frequency in Hz */
struct iw_param sens; /* signal level threshold */
struct iw_param bitrate; /* default bit rate */
struct iw_param txpower; /* default transmit power */
struct iw_param rts; /* RTS threshold threshold */
struct iw_param frag; /* Fragmentation threshold */
__u32 mode; /* Operation mode */
struct iw_param retry; /* Retry limits & lifetime */
struct iw_point encoding; /* Encoding stuff : tokens */
struct iw_param power; /* PM duration/timeout */
struct iw_quality qual; /* Quality part of statistics */
struct sockaddr ap_addr; /* Access point address */
struct sockaddr addr; /* Destination address (hw/mac) */
struct iw_param param; /* Other small parameters */
struct iw_point data; /* Other large parameters */
};
I cannot think of a way to access it other than bitrate->value
