+
+/*
+ * Copyright (c) 2008, Thomas d'Otreppe
+ *
+ * Common OSdep stuff
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/**
+ * Return the frequency in Mhz from a channel number
+ * @param channel number of the channel
+ * @return frequency of the channel
+ */
+int
+getFrequencyFromChannel (int channel)
+{
+ static int frequencies[] = {
+ -1, // No channel 0
+ 2412, 2417, 2422, 2427, 2432, 2437, 2442, 2447, 2452, 2457, 2462, 2467,
+ 2472, 2484,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // Nothing from channel 15 to 34 (exclusive)
+ 5170, 5175, 5180, 5185, 5190, 5195, 5200, 5205, 5210, 5215, 5220, 5225,
+ 5230, 5235, 5240, 5245,
+ 5250, 5255, 5260, 5265, 5270, 5275, 5280, 5285, 5290, 5295, 5300, 5305,
+ 5310, 5315, 5320, 5325,
+ 5330, 5335, 5340, 5345, 5350, 5355, 5360, 5365, 5370, 5375, 5380, 5385,
+ 5390, 5395, 5400, 5405,
+ 5410, 5415, 5420, 5425, 5430, 5435, 5440, 5445, 5450, 5455, 5460, 5465,
+ 5470, 5475, 5480, 5485,
+ 5490, 5495, 5500, 5505, 5510, 5515, 5520, 5525, 5530, 5535, 5540, 5545,
+ 5550, 5555, 5560, 5565,
+ 5570, 5575, 5580, 5585, 5590, 5595, 5600, 5605, 5610, 5615, 5620, 5625,
+ 5630, 5635, 5640, 5645,
+ 5650, 5655, 5660, 5665, 5670, 5675, 5680, 5685, 5690, 5695, 5700, 5705,
+ 5710, 5715, 5720, 5725,
+ 5730, 5735, 5740, 5745, 5750, 5755, 5760, 5765, 5770, 5775, 5780, 5785,
+ 5790, 5795, 5800, 5805,
+ 5810, 5815, 5820, 5825, 5830, 5835, 5840, 5845, 5850, 5855, 5860, 5865,
+ 5870, 5875, 5880, 5885,
+ 5890, 5895, 5900, 5905, 5910, 5915, 5920, 5925, 5930, 5935, 5940, 5945,
+ 5950, 5955, 5960, 5965,
+ 5970, 5975, 5980, 5985, 5990, 5995, 6000, 6005, 6010, 6015, 6020, 6025,
+ 6030, 6035, 6040, 6045,
+ 6050, 6055, 6060, 6065, 6070, 6075, 6080, 6085, 6090, 6095, 6100
+ };
+
+ return ((channel > 0) &&
+ (channel <
+ sizeof (frequencies) / sizeof (int))) ? frequencies[channel] : -1;
+}
+
+/**
+ * Return the channel from the frequency (in Mhz)
+ * @param frequency of the channel
+ * @return number of the channel
+ */
+int
+getChannelFromFrequency (int frequency)
+{
+ if (frequency >= 2412 && frequency <= 2472)
+ return (frequency - 2407) / 5;
+ else if (frequency == 2484)
+ return 14;
+ else if (frequency >= 5000 && frequency <= 6100)
+ return (frequency - 5000) / 5;
+ else
+ return -1;
+}