/*
 * wavemon - a wireless network monitoring aplication
 *
 * Copyright (c) 2001-2002 Jan Morgenstern <jan@jm-music.de>
 *
 * wavemon 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, or (at your option) any later
 * version.
 *
 * wavemon 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 wavemon; see the file COPYING.  If not, write to the Free Software
 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */
#include "wavemon.h"
#include <netdb.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <netinet/ether.h>
#include <net/if_arp.h>
#include <net/ethernet.h>
#include <sys/socket.h>
#include <linux/if.h>
#include <linux/wireless.h>

/* Definitions that appeared in more recent versions of wireless.h */
#ifndef IW_POWER_SAVING
#define IW_POWER_SAVING	0x4000		/* version 20 -> 21 */
#endif
#ifndef IW_MODE_MESH
#define IW_MODE_MESH	7		/* introduced in 2.6.26-rc1 */
#endif

/* Maximum length of a MAC address: 2 * 6 hex digits, 6 - 1 colons, plus '\0' */
#define MAC_ADDR_MAX	18

/*
 * Threshold for 'sane' noise levels.
 *
 * Some drivers simply set an arbitrary minimum noise level to mean 'invalid',
 * but do not set IW_QUAL_NOISE_INVALID so that the display gets stuck at a
 * "house number". The value below is suggested by and taken from the iwl3945
 * driver (constant IWL_NOISE_MEAS_NOT_AVAILABLE in iwl-3945.h).
 */
#define NOISE_DBM_SANE_MIN	-127

/**
 * struct if_info  -  wireless interface network information
 * @hwaddr:		MAC address
 * @addr:		IPv4 interface address
 * @netmask:		IPv4 interface netmask
 * @bcast:		IPv4 interface broadcast address
 * @mtu:		interface MTU
 * @txqlen:		tx queue length
 * @flags:		interface flags
 * See also netdevice(7)
 */
struct if_info {
	struct ether_addr	hwaddr;
	struct in_addr		addr,
				netmask,
				bcast;
	uint16_t		mtu;
	short			txqlen;
	short			flags;
};
extern bool if_is_up(int skfd, const char *ifname);
extern int  if_set_up(int skfd, const char *ifname);
extern void if_getinf(const char *ifname, struct if_info *info);

/**
 * struct iw_key  -  Encoding information
 * @key:	encryption key
 * @size:	length of @key in bytes
 * @flags:	flags reported by SIOCGIWENCODE
 */
struct iw_key {
	uint8_t		key[IW_ENCODING_TOKEN_MAX];
	uint16_t	size;
	uint16_t	flags;
};

/**
 * struct iw_dyn_info  -  modified iw_req
 * @name:	interface name
 * @mode:	current operation mode (IW_MODE_xxx)
 *
 * @cap_*:	indicating capability/presence
 *
 * @essid:	Extended Service Set ID (network name)
 * @essid_ct:	index number of the @essid (starts at 1, 0 = off)
 * @nickname:	optional station nickname
 * @nwid:	Network ID (pre-802.11 hardware only)
 * @ap_addr:	BSSID or IBSSID
 *
 * @retry:	MAC-retransmission retry behaviour
 * @rts:	minimum packet size for which to perform RTS/CTS handshake
 * @frag:	802.11 frame fragmentation threshold size
 * @txpower:	TX power information
 * @power	power management information
 *
 * @freq:	frequency in Hz
 * @sens:	sensitivity threshold of the card
 * @bitrate:	bitrate (client mode)
 *
 * @keys:	array of encryption keys
 * @nkeys:	length of @keys
 * @active_key:	index of current key into @keys (counting from 1)
 *
 */
struct iw_dyn_info {
	char		name[IFNAMSIZ];
	uint8_t		mode;

	bool		cap_essid:1,
			cap_nwid:1,
			cap_nickname:1,
			cap_freq:1,
			cap_sens:1,
			cap_txpower:1,
			cap_retry:1,
			cap_rts:1,
			cap_frag:1,
			cap_mode:1,
			cap_ap:1,
			cap_power:1,
			cap_aplist:1;

	char		essid[IW_ESSID_MAX_SIZE+2];
	uint8_t		essid_ct;
	char		nickname[IW_ESSID_MAX_SIZE+2];
	struct iw_param nwid;
	struct sockaddr ap_addr;

	struct iw_param retry;
	struct iw_param rts;
	struct iw_param frag;
	struct iw_param txpower;
	struct iw_param power;

	float		freq;
	int32_t		sens;
	unsigned long	bitrate;

	struct iw_key	*keys;
	uint8_t		nkeys;
	uint8_t		active_key;
};

/* Return the number of encryption keys marked 'active' in @info */
static inline uint8_t dyn_info_active_keys(struct iw_dyn_info *info)
{
	int i, num_active = 0;

	for (i = 0; i < info->nkeys; i++)
		num_active += info->keys[i].size &&
			      !(info->keys[i].flags & IW_ENCODE_DISABLED);
	return num_active;
}

/* Return the number of 40-bit/104-bit keys in @info */
static inline uint8_t dyn_info_wep_keys(struct iw_dyn_info *info)
{
	int i, num_wep = 0;

	for (i = 0; i < info->nkeys; i++)
		if (!(info->keys[i].flags & IW_ENCODE_DISABLED))
			num_wep += info->keys[i].size == 5 ||
				   info->keys[i].size == 13;
	return num_wep;
}
extern void dyn_info_get(struct iw_dyn_info *info,
			 const char *ifname, struct iw_range *ir);
extern void dyn_info_cleanup(struct iw_dyn_info *info);


/**
 * struct if_stat  -  Packet/byte counts for interfaces
 */
struct if_stat {
	unsigned long long	rx_packets,
				tx_packets;
	unsigned long long	rx_bytes,
				tx_bytes;
};

extern void if_getstat(const char *i<style>pre { line-height: 125%; margin: 0; }
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BBC-News24:578000000:INVERSION_OFF:BANDWIDTH_8_MHZ:FEC_2_3:FEC_NONE:QAM_64:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:640:641
BBC-1:578000000:INVERSION_OFF:BANDWIDTH_8_MHZ:FEC_2_3:FEC_NONE:QAM_64:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:600:601
BBC-Parliament:578000000:INVERSION_OFF:BANDWIDTH_8_MHZ:FEC_2_3:FEC_NONE:QAM_64:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:0:660
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ITV-2:850000000:INVERSION_OFF:BANDWIDTH_8_MHZ:FEC_2_3:FEC_NONE:QAM_64:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:2818:2819
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C4:850000000:INVERSION_OFF:BANDWIDTH_8_MHZ:FEC_2_3:FEC_NONE:QAM_64:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:2826:2827
E4:850000000:INVERSION_OFF:BANDWIDTH_8_MHZ:FEC_2_3:FEC_NONE:QAM_64:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:2831:2832
C5:713833334:INVERSION_OFF:BANDWIDTH_8_MHZ:FEC_2_3:FEC_NONE:QAM_64:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:6017:6018
Shop:713833334:INVERSION_OFF:BANDWIDTH_8_MHZ:FEC_2_3:FEC_NONE:QAM_64:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:6049:6050
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</pre></div>
</code></pre></td></tr></table>
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