iwcommon.h

MAPI: API for wireless cards under Linux 提供wireless的API函数。大家可以通过这个程序

/*
 *	Wireless Tools
 *
 *		Jean II - HPLB '99
 *
 * Common header for the wireless tools...
 */

#ifndef IWCOMMON_H
#define IWCOMMON_H

/************************** DOCUMENTATION **************************/
/*
 * None ? Todo...
 */

/* --------------------------- HISTORY --------------------------- */
/*
 * wireless 16 :		(Jean Tourrilhes)
 * -----------
 *	o iwconfig, iwpriv & iwspy
 *
 * wireless 17 :		(Justin Seger)
 * -----------
 *	o Compile under glibc fix
 *	o merge iwpriv in iwconfig
 *	o Add Wavelan roaming support
 *	o Update man page of iwconfig
 *
 * wireless 18 :
 * -----------
 *		(From Andreas Neuhaus <[e-mail]>)
 *	o Many fix to remove "core dumps" in iwconfig
 *	o Remove useless headers in iwconfig
 *	o CHAR wide private ioctl
 *		(From Jean Tourrilhes)
 *	o Create iwcommon.h and iwcommon.c
 *	o Separate iwpriv again for user interface issues
 *	  The folllowing didn't make sense and crashed :
 *		iwconfig eth0 priv sethisto 12 15 nwid 100
 *	o iwspy no longer depend on net-tools-1.2.0
 *	o Reorganisation of the code, cleanup
 *	o Add ESSID stuff in iwconfig
 *	o Add display of level & noise in dBm (stats in iwconfig)
 *	o Update man page of iwconfig and iwpriv
 *	o Add xwireless (didn't check if it compiles)
 *		(From Dean W. Gehnert <[e-mail]>)
 *	o Minor fixes
 *		(Jan Rafaj <[e-mail]>)
 *	o Cosmetic changes (sensitivity relative, freq list)
 *	o Frequency computation on double
 *	o Compile clean on libc5
 *		(From Jean Tourrilhes)
 *	o Move listing of frequencies to iwspy
 *	o Add AP address stuff in iwconfig
 *	o Add AP list stuff in iwspy
 *
 * wireless 19 :
 * -----------
 *		(From Jean Tourrilhes)
 *	o Allow for sensitivity in dBm (if < 0) [iwconfig]
 *	o Formatting changes in displaying ap address in [iwconfig]
 *	o Slightly improved man pages and usage display
 *	o Add channel number for each frequency in list [iwspy]
 *	o Add nickname... [iwconfig]
 *	o Add "port" private ioctl shortcut [iwpriv]
 *	o If signal level = 0, no range or dBms [iwconfig]
 *	o I think I now got set/get char strings right in [iwpriv]
 *		(From Thomas Ekstrom <[e-mail]>)
 *	o Fix a very obscure bug in [iwspy]
 *
 * wireless 20 :
 * -----------
 *		(From Jean Tourrilhes)
 *	o Remove all #ifdef WIRELESS ugliness, but add a #error :
 *		we require Wireless Extensions 9 or nothing !  [all]
 *	o Switch to new 'nwid' definition (specific -> iw_param) [iwconfig]
 *	o Rewriten totally the encryption support [iwconfig]
 *		- Multiple keys, through key index
 *		- Flexible/multiple key size, and remove 64bits upper limit
 *		- Open/Restricted modes
 *		- Enter keys as ASCII strings
 *	o List key sizes supported and all keys in [iwspy]
 *	o Mode of operation support (ad-hoc, managed...) [iwconfig]
 *	o Use '=' to indicate fixed instead of ugly '(f)' [iwconfig]
 *	o Ability to disable RTS & frag (off), now the right way [iwconfig]
 *	o Auto as an input modifier for bitrate [iwconfig]
 *	o Power Management support [iwconfig]
 *		- set timeout or period and its value
 *		- Reception mode (unicast/multicast/all)
 *	o Updated man pages with all that ;-)
 */

/* ----------------------------- TODO ----------------------------- */
/*
 * One day, maybe...
 *
 * iwconfig :
 * --------
 *	Make disable a per encryption key modifier if some hardware
 *	requires it.
 *	Should not mention "Access Point" but something different when
 *	in ad-hoc mode.
 *
 * iwpriv :
 * ------
 *	Remove 'port' and 'roam' cruft now that we have mode in iwconfig
 *
 * iwspy :
 * -----
 *	?
 *
 * Doc & man pages :
 * ---------------
 *	Update main doc.
 *
 * Other :
 * -----
 *	What about some graphical tools ?
 */

/***************************** 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 */

/* This is our header selection. Try to hide the mess and the misery :-(
 * Please choose only one of the define...
 */
/* Kernel headers 2.0.X + Glibc 2.0 - Debian 2.0, RH5
 * Kernel headers 2.2.X + Glibc 2.1 - Debian 2.2, RH6.1 */
#define GLIBC_HEADERS

/* Kernel headers 2.2.X + Glibc 2.0 - Debian 2.1 */
#undef KLUDGE_HEADERS

/* Kernel headers 2.0.X + libc5 - old systems */
#undef LIBC5_HEADERS

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

#if defined(KLUDGE_HEADERS) || defined(GLIBC_HEADERS)
#include <linux/if_arp.h>	/* For ARPHRD_ETHER */
#include <linux/socket.h>	/* For AF_INET & struct sockaddr */
/* mos
#include <linux/in.h>		
*/
#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 */

/* Wireless extensions */
#include <linux/wireless.h>

#if WIRELESS_EXT < 8
#error "Wireless Extension v9 or newer required :-(\n\
Use Wireless Tools v19 or update your kernel headers"
#endif

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


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

/* Some usefull constants */
#define KILO	1e3
#define MEGA	1e6
#define GIGA	1e9

/****************************** 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_priv_args	iwprivargs;
typedef struct sockaddr		sockaddr;

/* Structure for storing all wireless information for each device */
typedef struct wireless_info
{
  char		name[IFNAMSIZ];		/* Wireless/protocol name */
  int		has_nwid;
  iwparam	nwid;			/* Network ID */
  int		has_freq;
  float		freq;			/* Frequency/channel */
  int		has_sens;
  iwparam	sens;			/* sensitivity */
  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_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_mode;
  int		mode;			/* Operation mode */
  int		has_power;
  iwparam	power;			/* Power management parameters */

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

/**************************** PROTOTYPES ****************************/
/*
 * All the functions in iwcommon.c
 */
/* ---------------------- SOCKET SUBROUTINES -----------------------*/
int
	sockets_open(void);
/* --------------------- WIRELESS SUBROUTINES ----------------------*/
int
	get_range_info(int		skfd,
		       char *		ifname,
		       iwrange *	range);
int
	get_priv_info(int		skfd,
		      char *		ifname,
		      iwprivargs *	priv);
/* -------------------- FREQUENCY SUBROUTINES --------------------- */
void
	float2freq(double	in,
		   iwfreq *	out);
double
	freq2float(iwfreq *	in);
/* --------------------- ADDRESS SUBROUTINES ---------------------- */
int
	check_addr_type(int	skfd,
			char *	ifname);
char *
	pr_ether(unsigned char *ptr);
int
	in_ether(char *bufp, struct sockaddr *sap);
int
	in_inet(char *bufp, struct sockaddr *sap);
int
	in_addr(int		skfd,
		char *		ifname,
		char *		bufp,
		struct sockaddr *sap);
/* ----------------------- MISC SUBROUTINES ------------------------ */
int
	byte_size(int		args);

/**************************** VARIABLES ****************************/

#endif	/* IWCOMMON_H */