iwlib.h

采用嵌入式开发的wireless无线模组的应用开发工具

/*
 *	Wireless Tools
 *
 *		Jean II - HPLB 97->99 - HPL 99->04
 *
 * Common header for the Wireless Extension library...
 *
 * This file is released under the GPL license.
 *     Copyright (c) 1997-2004 Jean Tourrilhes <[e-mail]>
 */

#ifndef IWLIB_H
#define IWLIB_H

/*#include "CHANGELOG.h"*/

/***************************** INCLUDES *****************************/

/* Standard headers */
#include <sys/types.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <math.h>
#include <errno.h>
#include <fcntl.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <netdb.h>		/* gethostbyname, getnetbyname */
#include <net/ethernet.h>	/* struct ether_addr */
#include <sys/time.h>		/* struct timeval */
#include <unistd.h>

/* This is our header selection. Try to hide the mess and the misery :-(
 * Don't look, you would go blind ;-) */

#ifndef LINUX_VERSION_CODE
#include <linux/version.h>
#endif

/* Kernel headers 2.4.X + Glibc 2.2 - Mandrake 8.0, Debian 2.3, RH 7.1
 * Kernel headers 2.2.X + Glibc 2.2 - Slackware 8.0 */
#if defined(__GLIBC__) \
    && __GLIBC__ == 2 \
    && __GLIBC_MINOR__ >= 2 \
    && LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
//#define GLIBC22_HEADERS
#define GENERIC_HEADERS

/* Kernel headers 2.4.X + Glibc 2.1 - Debian 2.2 upgraded, RH 7.0
 * Kernel headers 2.2.X + Glibc 2.1 - Debian 2.2, RH 6.1 */
#elif defined(__GLIBC__) \
      && __GLIBC__ == 2 \
      && __GLIBC_MINOR__ == 1 \
      && LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
//#define GLIBC_HEADERS
#define GENERIC_HEADERS

/* Kernel headers 2.2.X + Glibc 2.0 - Debian 2.1 */
#elif defined(__GLIBC__) \
      && __GLIBC__ == 2 \
      && __GLIBC_MINOR__ == 0 \
      && LINUX_VERSION_CODE >= KERNEL_VERSION(2,0,0) \
      && LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0)
#define GLIBC_HEADERS
#define KLUDGE_HEADERS

/* Note : is it really worth supporting kernel 2.0.X, knowing that
 * we require WE v9, which is only available in 2.2.X and higher ?
 * I guess one could use 2.0.x with an upgraded wireless.h... */

/* Kernel headers 2.0.X + Glibc 2.0 - Debian 2.0, RH 5 */
#elif defined(__GLIBC__) \
      && __GLIBC__ == 2 \
      && __GLIBC_MINOR__ == 0 \
      && LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0) \
      && LINUX_VERSION_CODE >= KERNEL_VERSION(2,0,0)
#define GLIBC_HEADERS

/* Kernel headers 2.0.X + libc5 - old systems */
#elif defined(_LINUX_C_LIB_VERSION_MAJOR) \
      && _LINUX_C_LIB_VERSION_MAJOR == 5 \
      && LINUX_VERSION_CODE >= KERNEL_VERSION(2,0,0) \
      && LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0)
#define LIBC5_HEADERS

/* Unsupported combination */
#else
#error "Your kernel/libc combination is not supported"
#endif

#ifdef GENERIC_HEADERS 
/* Proposed by Dr. Michael Rietz <[e-mail]>, 27.3.2 */
/* If this works for all, it might be more stable on the long term - Jean II */
#include <net/if_arp.h>		/* For ARPHRD_ETHER */
#include <sys/socket.h>		/* For AF_INET & struct sockaddr */
#include <netinet/in.h>         /* For struct sockaddr_in */
#include <netinet/if_ether.h>
#endif /* GENERIC_HEADERS */    

#ifdef GLIBC22_HEADERS 
/* Added by Ross G. Miller <[e-mail]>, 3/28/01 */
#include <linux/if_arp.h> 	/* For ARPHRD_ETHER */
#include <linux/socket.h>	/* For AF_INET & struct sockaddr */
#include <sys/socket.h>
#endif /* GLIBC22_HEADERS */    

#ifdef KLUDGE_HEADERS
#include <socketbits.h>
#endif	/* KLUDGE_HEADERS */

#ifdef GLIBC_HEADERS
#include <linux/if_arp.h>	/* For ARPHRD_ETHER */
#include <linux/socket.h>	/* For AF_INET & struct sockaddr */
#include <linux/in.h>		/* For struct sockaddr_in */
#endif	/* KLUDGE_HEADERS || GLIBC_HEADERS */

#ifdef LIBC5_HEADERS
#include <sys/socket.h>		/* For AF_INET & struct sockaddr & socket() */
#include <linux/if_arp.h>	/* For ARPHRD_ETHER */
#include <linux/in.h>		/* For struct sockaddr_in */
#endif	/* LIBC5_HEADERS */

/* Those 3 headers were previously included in wireless.h */
#include <linux/types.h>		/* for "caddr_t" et al		*/
#include <linux/socket.h>		/* for "struct sockaddr" et al	*/
#include <linux/if.h>			/* for IFNAMSIZ and co... */

/* Private copy of Wireless extensions (in this directoty) */
#include "wireless.h"

/* Make gcc understant that when we say inline, we mean it.
 * I really hate when the compiler is trying to be more clever than me,
 * because in this case gcc is not able to figure out functions with a
 * single call site, so not only I have to tag those functions inline
 * by hand, but then it refuse to inline them properly.
 * Total saving for iwevent : 150B = 0.7%.
 * Fortunately, in gcc 3.4, they now automatically inline static functions
 * with a single call site. Hurrah !
 * Jean II */
#if __GNUC__ == 3
#if __GNUC_MINOR__ >= 1 && __GNUC_MINOR__ < 4
#ifdef inline
#undef inline
#endif
#define inline		inline		__attribute__((always_inline))
#endif
#endif /* __GNUC__ */

#ifdef __cplusplus
extern "C" {
#endif

/****************************** DEBUG ******************************/


/************************ CONSTANTS & MACROS ************************/

/* Various versions information */
/* Recommended Wireless Extension version */
#define WE_VERSION	17
/* Version of Wireless Tools */
#define WT_VERSION	28

/* Paths */
#define PROC_NET_WIRELESS	"/proc/net/wireless"
#define PROC_NET_DEV		"/proc/net/dev"

/* Some usefull constants */
#define KILO	1e3
#define MEGA	1e6
#define GIGA	1e9
/* For doing log10/exp10 without libm */
#define LOG10_MAGIC	1.25892541179

/* Backward compatibility for Wireless Extension 9 */
#ifndef IW_POWER_MODIFIER
#define IW_POWER_MODIFIER	0x000F	/* Modify a parameter */
#define IW_POWER_MIN		0x0001	/* Value is a minimum  */
#define IW_POWER_MAX		0x0002	/* Value is a maximum */
#define IW_POWER_RELATIVE	0x0004	/* Value is not in seconds/ms/us */
#endif /* IW_POWER_MODIFIER */

#ifndef IW_ENCODE_NOKEY
#define IW_ENCODE_NOKEY         0x0800  /* Key is write only, so not here */
#define IW_ENCODE_MODE		0xF000	/* Modes defined below */
#endif /* IW_ENCODE_NOKEY */
#ifndef IW_ENCODE_TEMP
#define IW_ENCODE_TEMP		0x0400  /* Temporary key */
#endif /* IW_ENCODE_TEMP */

/* More backward compatibility */
#ifndef SIOCSIWCOMMIT
#define SIOCSIWCOMMIT	SIOCSIWNAME
#endif /* SIOCSIWCOMMIT */

/* Still more backward compatibility */
#ifndef IW_FREQ_FIXED
#define IW_FREQ_FIXED	0x01
#endif /* IW_FREQ_FIXED */

/****************************** TYPES ******************************/

/* Shortcuts */
typedef struct iw_statistics	iwstats;
typedef struct iw_range		iwrange;
typedef struct iw_param		iwparam;
typedef struct iw_freq		iwfreq;
typedef struct iw_quality	iwqual;
typedef struct iw_priv_args	iwprivargs;
typedef struct sockaddr		sockaddr;

/* Structure for storing all wireless information for each device
 * This is a cut down version of the one above, containing only
 * the things *truly* needed to configure a card.
 * Don't add other junk, I'll remove it... */
typedef struct wireless_config
{
  char		name[IFNAMSIZ + 1];	/* Wireless/protocol name */
  int		has_nwid;
  iwparam	nwid;			/* Network ID */
  int		has_freq;
  double	freq;			/* Frequency/channel */
  int		freq_flags;
  int		has_key;
  unsigned char	key[IW_ENCODING_TOKEN_MAX];	/* Encoding key used */
  int		key_size;		/* Number of bytes */
  int		key_flags;		/* Various flags */
  int		has_essid;
  int		essid_on;
  char		essid[IW_ESSID_MAX_SIZE + 1];	/* ESSID (extended network) */
  int		has_mode;
  int		mode;			/* Operation mode */
} wireless_config;

/* Structure for storing all wireless information for each device
 * This is pretty exhaustive... */
typedef struct wireless_info
{
  struct wireless_config	b;	/* Basic information */

  int		has_sens;
  iwparam	sens;			/* sensitivity */
  int		has_nickname;
  char		nickname[IW_ESSID_MAX_SIZE + 1]; /* NickName */
  int		has_ap_addr;
  sockaddr	ap_addr;		/* Access point address */
  int		has_bitrate;
  iwparam	bitrate;		/* Bit rate in bps */
  int		has_rts;
  iwparam	rts;			/* RTS threshold in bytes */
  int		has_frag;
  iwparam	frag;			/* Fragmentation threshold in bytes */
  int		has_power;
  iwparam	power;			/* Power management parameters */
  int		has_txpower;
  iwparam	txpower;		/* Transmit Power in dBm */
  int		has_retry;
  iwparam	retry;			/* Retry limit or lifetime */

  /* Stats */
  iwstats	stats;
  int		has_stats;
  iwrange	range;
  int		has_range;
} wireless_info;

/* Structure for storing an entry of a wireless scan.
 * This is only a subset of all possible information, the flexible
 * structure of scan results make it impossible to capture all
 * information in such a static structure. */
typedef struct wireless_scan
{
  /* Linked list */
  struct wireless_scan *	next;

  /* Cell identifiaction */
  int		has_ap_addr;
  sockaddr	ap_addr;		/* Access point address */

  /* Other information */
  struct wireless_config	b;	/* Basic information */
  iwstats	stats;			/* Signal strength */
  int		has_stats;
} wireless_scan;

/*
 * Context used for non-blocking scan.
 */
typedef struct wireless_scan_head
{
  wireless_scan *	result;		/* Result of the scan */
  int			retry;		/* Retry level */
} wireless_scan_head;

/* Structure used for parsing event streams, such as Wireless Events
 * and scan results */