1 files changed, 76 insertions, 0 deletions
diff --git a/wsutil/frequency-utils.h b/wsutil/frequency-utils.h
new file mode 100644
index 0000000000..10603e06d7
--- /dev/null
+++ b/wsutil/frequency-utils.h
@@ -0,0 +1,76 @@
+/* frequency-utils.h
+ * Frequency conversion utility definitions
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 2007 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef __FREQUENCY_UTILS_H__
+#define __FREQUENCY_UTILS_H__
+
+#include "ws_symbol_export.h"
+
+/** @file
+ * Frequency and channel conversion utilities.
+ */
+
+/**
+ * Given a center frequency in MHz, return a channel number.
+ * @param freq Frequency in MHz.
+ * @return The equivalent channel or -1 if no match is found.
+ */
+WS_DLL_PUBLIC
+gint
+ieee80211_mhz_to_chan(guint freq);
+
+/**
+ * Given a channel number and a band type, return a center frequency.
+ * @param chan Channel number
+ * @param is_bg TRUE if the channel is a b/g channel, FALSE otherwise.
+ * @return The equivalent frequency or 0 if no match is found.
+ */
+WS_DLL_PUBLIC
+guint
+ieee80211_chan_to_mhz(gint chan, gboolean is_bg);
+
+/**
+ * Given a frequency in MHz, return a string representation.
+ * @param freq Frequench in MHz.
+ * @return A string showing the frequency, channel number, and type.  The string must be freed with g_free() after use.
+ */
+WS_DLL_PUBLIC
+gchar*
+ieee80211_mhz_to_str(guint freq);
+
+/* Should this be "(freq < 4920)", or something else? */
+#define FREQ_IS_BG(freq) (freq <= 2484)
+
+#endif /* __FREQUENCY_UTILS_H__ */
+
+/*
+ * Editor modelines
+ *
+ * Local Variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * vi: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */