/*
 * helper_common.c
 *
 *  Created on: 28.03.2011
 *      Author: David Brodski
 */

#include <sys/socket.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <resolv.h>
#include <string.h>
#include <utime.h>
#include <unistd.h>
#include <getopt.h>

#include "platform.h"
#include "gnunet_constants.h"
#include "gnunet_os_lib.h"
#include "gnunet_transport_plugin.h"
#include "transport.h"
#include "gnunet_util_lib.h"
#include "plugin_transport_wlan.h"
#include "gnunet_common.h"
#include "gnunet_transport_plugin.h"
//#include "gnunet_util_lib.h"

/**
 * function to create GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL message for plugin
 * @param buffer pointer to buffer for the message
 * @param mac pointer to the mac address
 * @return number of bytes written
 */

int
send_mac_to_plugin(char * buffer, uint8_t * mac)
{

  struct Wlan_Helper_Control_Message macmsg;

  memcpy(macmsg.mac.mac, mac, sizeof(struct MacAddress));
  macmsg.hdr.size = htons(sizeof(struct Wlan_Helper_Control_Message));
  macmsg.hdr.type = htons(GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL);

  memcpy(buffer, &macmsg, sizeof(struct Wlan_Helper_Control_Message));
  return sizeof(struct Wlan_Helper_Control_Message);
}

/*
   *  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
 */
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 <= 221) ? frequencies[channel] : -1;
}

/**
 * Return the channel from the frequency (in Mhz)
 */
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;
}