libnm: add utility functions for getting 2.4 GHz and 5 GHz Wi-Fi frequences

nm_utils_wifi_2ghz_freqs()
nm_utils_wifi_5ghz_freqs()

3 files changed, 62 insertions, 0 deletions

diff --git a/libnm-core/nm-utils.c b/libnm-core/nm-utils.c
index 8b44a32bc8..9e59840287 100644
--- a/libnm-core/nm-utils.c
+++ b/libnm-core/nm-utils.c
@@ -2828,6 +2828,62 @@ nm_utils_wifi_is_channel_valid (guint32 channel, const char *band)
 		return FALSE;
 }
 
+static const int const *
+_wifi_freqs (gboolean bg_band)
+{
+	static int *freqs_2ghz = NULL;
+	static int *freqs_5ghz = NULL;
+	int *freqs;
+
+	freqs = bg_band ? freqs_2ghz : freqs_5ghz;
+	if (G_UNLIKELY (freqs == NULL)) {
+		struct cf_pair *table;
+		int i;
+
+		table = bg_band ? bg_table : a_table;
+		freqs = g_new0 (int, bg_band ? G_N_ELEMENTS (bg_table) : G_N_ELEMENTS (a_table));
+		for (i = 0; table[i].chan; i++)
+			freqs[i] = table[i].freq;
+		freqs[i] = 0;
+		if (bg_band)
+			freqs_2ghz = freqs;
+		else
+			freqs_5ghz = freqs;
+	}
+	return freqs;
+}
+
+/**
+ * nm_utils_wifi_2ghz_freqs:
+ *
+ * Utility function to return list of 2.4 GHz Wi-Fi frequences.
+ * Utility function to return 2.4 GHz Wi-Fi frequences (802.11bg band).
+ *
+ * Returns: zero-terminated array of frequences numbers (in MHz)
+ *
+ * Since: 1.2
+ **/
+const int const *
+nm_utils_wifi_2ghz_freqs (void)
+{
+	return _wifi_freqs (TRUE);
+}
+
+/**
+ * nm_utils_wifi_5ghz_freqs:
+ *
+ * Utility function to return 5 GHz Wi-Fi frequences (802.11a band).
+ *
+ * Returns: zero-terminated array of frequences numbers (in MHz)
+ *
+ * Since: 1.2
+ **/
+const int const *
+nm_utils_wifi_5ghz_freqs (void)
+{
+	return _wifi_freqs (FALSE);
+}
+
 /**
  * nm_utils_wifi_strength_bars:
  * @strength: the access point strength, from 0 to 100
diff --git a/libnm-core/nm-utils.h b/libnm-core/nm-utils.h
index 64e57e875a..7d2387b7a0 100644
--- a/libnm-core/nm-utils.h
+++ b/libnm-core/nm-utils.h
@@ -144,6 +144,10 @@ guint32 nm_utils_wifi_freq_to_channel (guint32 freq);
 guint32 nm_utils_wifi_channel_to_freq (guint32 channel, const char *band);
 guint32 nm_utils_wifi_find_next_channel (guint32 channel, int direction, char *band);
 gboolean nm_utils_wifi_is_channel_valid (guint32 channel, const char *band);
+NM_AVAILABLE_IN_1_2
+const int const *nm_utils_wifi_2ghz_freqs (void);
+NM_AVAILABLE_IN_1_2
+const int const *nm_utils_wifi_5ghz_freqs (void);
 
 const char *nm_utils_wifi_strength_bars (guint8 strength);
 
diff --git a/libnm/libnm.ver b/libnm/libnm.ver
index ee23ad06e2..125aaa51cf 100644
--- a/libnm/libnm.ver
+++ b/libnm/libnm.ver
@@ -876,6 +876,8 @@ global:
 	nm_utils_bond_mode_string_to_int;
 	nm_utils_enum_from_str;
 	nm_utils_enum_to_str;
+	nm_utils_wifi_2ghz_freqs;
+	nm_utils_wifi_5ghz_freqs;
 	nm_vpn_editor_plugin_load_from_file;
 	nm_vpn_plugin_info_get_filename;
 	nm_vpn_plugin_info_get_editor_plugin;