libs/iwinfo: add *_get_freqlist()

[project/luci.git] / libs / iwinfo / src / iwinfo_wext.c

diff --git a/libs/iwinfo/src/iwinfo_wext.c b/libs/iwinfo/src/iwinfo_wext.c
index 387cb13..eebaea6 100644 (file)
--- a/libs/iwinfo/src/iwinfo_wext.c
+++ b/libs/iwinfo/src/iwinfo_wext.c
@@ -394,6 +394,37 @@ int wext_get_txpwrlist(const char *ifname, char *buf, int *len)
        return -1;      
 }
 
+int wext_get_freqlist(const char *ifname, char *buf, int *len)
+{
+       struct iwreq wrq;
+       struct iw_range range;
+       struct iwinfo_freqlist_entry entry;
+       int i, bl;
+
+       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)
+       {
+               bl = 0;
+
+               for(i = 0; i < range.num_frequency; i++)
+               {
+                       entry.mhz     = wext_freq2mhz(&range.freq[i]);
+                       entry.channel = range.freq[i].i;
+
+                       memcpy(&buf[bl], &entry, sizeof(struct iwinfo_freqlist_entry));
+                       bl += sizeof(struct iwinfo_freqlist_entry);
+               }
+
+               *len = bl;
+               return 0;
+       }
+
+       return -1;
+}
+
 int wext_get_mbssid_support(const char *ifname, int *buf)
 {
        /* No multi bssid support atm */