+static int nl80211_get_center_freq1_cb(struct nl_msg *msg, void *arg)
+{
+ int *freq = arg;
+ struct nlattr **tb = nl80211_parse(msg);
+
+ if (tb[NL80211_ATTR_CENTER_FREQ1])
+ *freq = nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ1]);
+
+ return NL_SKIP;
+}
+
+static int nl80211_get_center_freq1(const char *ifname, int *buf)
+{
+ char *res;
+
+ /* try to find frequency from interface info */
+ res = nl80211_phy2ifname(ifname);
+ *buf = 0;
+
+ nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
+ nl80211_get_center_freq1_cb, buf);
+
+ return (*buf == 0) ? -1 : 0;
+}
+
+static int nl80211_get_center_freq2_cb(struct nl_msg *msg, void *arg)
+{
+ int *freq = arg;
+ struct nlattr **tb = nl80211_parse(msg);
+
+ if (tb[NL80211_ATTR_CENTER_FREQ2])
+ *freq = nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ2]);
+
+ return NL_SKIP;
+}
+
+static int nl80211_get_center_freq2(const char *ifname, int *buf)
+{
+ char *res;
+
+ /* try to find frequency from interface info */
+ res = nl80211_phy2ifname(ifname);
+ *buf = 0;
+
+ nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
+ nl80211_get_center_freq2_cb, buf);
+
+ return (*buf == 0) ? -1 : 0;
+}
+