/*
     This file is part of GNUnet.
     (C) 2009 Christian Grothoff (and other contributing authors)

     GNUnet 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 3, or (at your
     option) any later version.

     GNUnet 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 GNUnet; see the file COPYING.  If not, write to the
     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
     Boston, MA 02111-1307, USA.
*/

/**
 * @file transport/gnunet-transport-wlan-helper.h
 * @brief common internal definitions for the wlan mediator
 * @author David Brodski
 */
 
#ifndef gnunet_wlan_H
#define gnunet_wlan_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 <pcap.h>
#include <endian.h>
#include <pcap.h>


typedef unsigned int u32;
typedef unsigned short u16;
typedef unsigned char u8;
typedef u32 __le32;

#if __BYTE_ORDER == __LITTLE_ENDIAN
#define	le16_to_cpu(x) (x)
#define	le32_to_cpu(x) (x)
#else
#define	le16_to_cpu(x) ((((x)&0xff)<<8)|(((x)&0xff00)>>8))
#define	le32_to_cpu(x) \
((((x)&0xff)<<24)|(((x)&0xff00)<<8)|(((x)&0xff0000)>>8)|(((x)&0xff000000)>>24))
#endif
#define	unlikely(x) (x)


#endif /* gnunet_wlan_H */


/* Radiotap header iteration
 *   implemented in net/wireless/radiotap.c
 *   docs in Documentation/networking/radiotap-headers.txt
 */
/**
 * struct ieee80211_radiotap_iterator - tracks walk thru present radiotap args
 * rtheader: pointer to the radiotap header we are walking through
 * max_length: length of radiotap header in cpu byte ordering
 * this_arg_index: IEEE80211_RADIOTAP_... index of current arg
 * this_arg: pointer to current radiotap arg
 * arg_index: internal next argument index
 * arg: internal next argument pointer
 * next_bitmap: internal pointer to next present u32
 * bitmap_shifter: internal shifter for curr u32 bitmap, b0 set == arg present
 */

struct ieee80211_radiotap_iterator {
	struct ieee80211_radiotap_header *rtheader;
	int max_length;
	int this_arg_index;
	u8 *this_arg;

	int arg_index;
	u8 *arg;
	__le32 *next_bitmap;
	u32 bitmap_shifter;
};

extern int ieee80211_radiotap_iterator_init(
   struct ieee80211_radiotap_iterator *iterator,
   struct ieee80211_radiotap_header *radiotap_header,
   int max_length);

extern int ieee80211_radiotap_iterator_next(
   struct ieee80211_radiotap_iterator *iterator);