+int wext_get_frequency(const char *ifname, int *buf)
+{
+ struct iwreq wrq;
+ struct iw_range range;
+ int i, channel;
+
+ if(wext_ioctl(ifname, SIOCGIWFREQ, &wrq) >= 0)
+ {
+ /* We got a channel number instead ... */
+ if( wrq.u.freq.m < 1000 )
+ {
+ channel = wrq.u.freq.m;
+ wrq.u.data.pointer = (caddr_t) ⦥
+ wrq.u.data.length = sizeof(struct iw_range);
+ wrq.u.data.flags = 0;
+
+ if(wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0)
+ {
+ for(i = 0; i < range.num_frequency; i++)
+ {
+ if( range.freq[i].i == channel )
+ {
+ *buf = wext_freq2mhz(&range.freq[i]);
+ return 0;
+ }
+ }
+ }
+ }
+ else
+ {
+ *buf = wext_freq2mhz(&wrq.u.freq);
+ return 0;
+ }
+ }
+
+ return -1;
+}
+