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/*

 * This file define a set of standard wireless extensions

 *

 * Version :    6       18.2.99

 *

 * Authors :    Jean Tourrilhes - HPLB - <jt@hplb.hpl.hp.com>

 */

#ifndef _LINUX_WIRELESS_H

#define _LINUX_WIRELESS_H

/************************** DOCUMENTATION **************************/

/*

 * Basically, the wireless extensions are for now a set of standard ioctl

 * call + /proc/net/wireless

 *

 * The entry /proc/net/wireless give statistics and information on the

 * driver.

 * This is better than having each driver having its entry because

 * its centralised and we may remove the driver module safely.

 *

 * Ioctl are used to configure the driver and issue commands.  This is

 * better than command line options of insmod because we may want to

 * change dynamically (while the driver is running) some parameters.

 *

 * The ioctl mechanimsm are copied from standard devices ioctl.

 * We have the list of command plus a structure descibing the

 * data exchanged...

 * Note that to add these ioctl, I was obliged to modify :

 *      net/core/dev.c (two place + add include)

 *      net/ipv4/af_inet.c (one place + add include)

 *

 * /proc/net/wireless is a copy of /proc/net/dev.

 * We have a structure for data passed from the driver to /proc/net/wireless

 * Too add this, I've modified :

 *      net/core/dev.c (two other places)

 *      include/linux/netdevice.h (one place)

 *      include/linux/proc_fs.h (one place)

 *

 * Do not add here things that are redundant with other mechanisms

 * (drivers init, ifconfig, /proc/net/dev, ...) and with are not

 * wireless specific.

 *

 * These wireless extensions are not magic : each driver has to provide

 * support for them...

 *

 * IMPORTANT NOTE : As everything in the kernel, this is very much a

 * work in progress. Contact me if you have ideas of improvements...

 */

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

#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... */

/**************************** CONSTANTS ****************************/

/* --------------------------- VERSION --------------------------- */

/*

 * This constant is used to know the availability of the wireless

 * extensions and to know which version of wireless extensions it is

 * (there is some stuff that will be added in the future...)

 * I just plan to increment with each new version.

 */

#define WIRELESS_EXT    6

/*

 * Changes :

 *

 * V2 to V3

 * --------

 *      Alan Cox start some incompatibles changes. I've integrated a bit more.

 *      - Encryption renamed to Encode to avoid US regulation problems

 *      - Frequency changed from float to struct to avoid problems on old 386

 *

 * V3 to V4

 * --------

 *      - Add sensitivity

 *

 * V4 to V5

 * --------

 *      - Missing encoding definitions in range

 *      - Access points stuff

 *

 * V5 to V6

 * --------

 *      - 802.11 support

 */

/* -------------------------- IOCTL LIST -------------------------- */

/* Basic operations */

#define SIOCSIWNAME     0x8B00          /* Unused ??? */

#define SIOCGIWNAME     0x8B01          /* get name */

#define SIOCSIWNWID     0x8B02          /* set network id */

#define SIOCGIWNWID     0x8B03          /* get network id */

#define SIOCSIWFREQ     0x8B04          /* set channel/frequency */

#define SIOCGIWFREQ     0x8B05          /* get channel/frequency */

#define SIOCSIWENCODE   0x8B06          /* set encoding info */

#define SIOCGIWENCODE   0x8B07          /* get encoding info */

#define SIOCSIWSENS     0x8B08          /* set sensitivity */

#define SIOCGIWSENS     0x8B09          /* get sensitivity */

/* Informative stuff */

#define SIOCSIWRANGE    0x8B0A          /* Unused ??? */

#define SIOCGIWRANGE    0x8B0B          /* Get range of parameters */

#define SIOCSIWPRIV     0x8B0C          /* Unused ??? */

#define SIOCGIWPRIV     0x8B0D          /* get private ioctl interface info */

/* Mobile IP support */

#define SIOCSIWSPY      0x8B10          /* set spy addresses */

#define SIOCGIWSPY      0x8B11          /* get spy info (quality of link) */

/* Access Point manipulation */

#define SIOCSIWAP       0x8B14          /* set access point hardware addresses */

#define SIOCGIWAP       0x8B15          /* get access point hardware addresses */

#define SIOCGIWAPLIST   0x8B17          /* get list of access point in range */

/* 802.11 specific support */

#define SIOCSIWESSID    0x8B1A          /* set ESSID (network name) */

#define SIOCGIWESSID    0x8B1B          /* get ESSID */

/* As the ESSID is a string up to 32 bytes long, it doesn't fit within the

 * 'iwreq' structure, so we need to use the 'data' member to point to a

 * string in user space, like it is done for RANGE...

 */

/* ------------------------- IOCTL STUFF ------------------------- */

/* The first and the last (range) */

#define SIOCIWFIRST     0x8B00

#define SIOCIWLAST      0x8B1B

/* Even : get (world access), odd : set (root access) */

#define IW_IS_SET(cmd)  (!((cmd) & 0x1))

#define IW_IS_GET(cmd)  ((cmd) & 0x1)

/* ------------------------- PRIVATE INFO ------------------------- */

/*

 * The following is used with SIOCGIWPRIV. It allow a driver to define

 * the interface (name, type of data) for its private ioctl.

 * Privates ioctl are SIOCDEVPRIVATE -> SIOCDEVPRIVATE + 0xF

 */

#define IW_PRIV_TYPE_MASK       0x7000  /* Type of arguments */

#define IW_PRIV_TYPE_NONE       0x0000

#define IW_PRIV_TYPE_BYTE       0x1000  /* Char as number */

#define IW_PRIV_TYPE_CHAR       0x2000  /* Char as character */

#define IW_PRIV_TYPE_INT        0x4000  /* 32 bits int */

#define IW_PRIV_TYPE_FLOAT      0x5000

#define IW_PRIV_SIZE_FIXED      0x0800  /* Variable or fixed nuber of args */

#define IW_PRIV_SIZE_MASK       0x07FF  /* Max number of those args */

/*

 * Note : if the number of args is fixed and the size < 16 octets,

 * instead of passing a pointer we will put args in the iwreq struct...

 */

/* ----------------------- OTHER CONSTANTS ----------------------- */

/* Maximum frequencies in the range struct */

#define IW_MAX_FREQUENCIES      16

/* Note : if you have something like 80 frequencies,

 * don't increase this constant and don't fill the frequency list.

 * The user will be able to set by channel anyway... */

/* Maximum of address that you may set with SPY */

#define IW_MAX_SPY              8

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

/* --------------------------- SUBTYPES --------------------------- */

/*

 *      A frequency

 *      For numbers lower than 10^9, we encode the number in 'mant' and

 *      set 'exp' to 0

 *      For number greater than 10^9, we divide it by a power of 10.

 *      The power of 10 is in 'exp', the result is in 'mant'.

 */

struct  iw_freq

{

        __u32           m;              /* Mantissa */

        __u16           e;              /* Exponent */

};

/*

 *      Quality of the link

 */

struct  iw_quality

{

        __u8            qual;           /* link quality (SNR or better...) */

        __u8            level;          /* signal level */

        __u8            noise;          /* noise level */

        __u8            updated;        /* Flags to know if updated */

};

/*

 *      Packet discarded in the wireless adapter due to

 *      "wireless" specific problems...

 */

struct  iw_discarded

{

        __u32           nwid;           /* Wrong nwid */

        __u32           code;           /* Unable to code/decode */

        __u32           misc;           /* Others cases */

};

/*

 *      Encoding information (setting and so on)

 *      Encoding might be hardware encryption, scrambing or others

 */

struct  iw_encoding

{

  __u8  method;                 /* Algorithm number / key used */

  __u64 code;                   /* Data/key used for algorithm */

};

/* ------------------------ WIRELESS STATS ------------------------ */

/*

 * Wireless statistics (used for /proc/net/wireless)

 */

struct  iw_statistics

{

        __u8            status;         /* Status

                                         * - device dependant for now */

        struct iw_quality       qual;           /* Quality of the link

                                                 * (instant/mean/max) */

        struct iw_discarded     discard;        /* Packet discarded counts */

};

/* ------------------------ IOCTL REQUEST ------------------------ */

/*

 * The structure to exchange data for ioctl.

 * This structure is the same as 'struct ifreq', but (re)defined for

 * convenience...

 *

 * Note that it should fit on the same memory footprint !

 * You should check this when increasing the above structures (16 octets)

 * 16 octets = 128 bits. Warning, pointers might be 64 bits wide...

 */

struct  iwreq

{

        union

        {

                char    ifrn_name[IFNAMSIZ];    /* if name, e.g. "en0" */

        } ifr_ifrn;

        /* Data part */

        union

        {

                /* Config - generic */

                char    name[IFNAMSIZ];

                /* Name : used to verify the presence of  wireless extensions.

                 * Name of the protocol/provider... */

                struct          /* network id (or domain) : used to */

                {               /* create logical channels on the air */

                        __u32   nwid;           /* value */

                        __u8    on;             /* active/unactive nwid */

                }       nwid;

                struct iw_freq  freq;   /* frequency or channel :

                                         * 0-1000 = channel

                                         * > 1000 = frequency in Hz */

                struct iw_encoding      encoding;       /* Encoding stuff */

                __u32   sensitivity;            /* signal level threshold */

                struct sockaddr ap_addr;        /* Access point address */

                struct          /* For all data bigger than 16 octets */

                {

                        caddr_t pointer;        /* Pointer to the data

                                                 * (in user space) */

                        __u16   length;         /* fields or byte size */

                        __u16   flags;          /* Unused */

                }       data;

        }       u;

};

/* -------------------------- IOCTL DATA -------------------------- */

/*

 *      For those ioctl which want to exchange mode data that what could

 *      fit in the above structure...

 */

/*

 *      Range of parameters

 */

struct  iw_range

{

        /* Informative stuff (to choose between different interface) */

        __u32           throughput;     /* To give an idea... */

        /* NWID (or domain id) */

        __u32           min_nwid;       /* Minimal NWID we are able to set */

        __u32           max_nwid;       /* Maximal NWID we are able to set */

        /* Frequency */

        __u16           num_channels;   /* Number of channels [0; num - 1] */

        __u8            num_frequency;  /* Number of entry in the list */

        struct iw_freq  freq[IW_MAX_FREQUENCIES];       /* list */

        /* Note : this frequency list doesn't need to fit channel numbers */

        /* signal level threshold range */

        __u32   sensitivity;

        /* Quality of link & SNR stuff */

        struct iw_quality       max_qual;       /* Quality of the link */

        /* Encoder stuff */

        struct iw_encoding      max_encoding;   /* Encoding max range */

};

/*

 * Private ioctl interface information

 */

struct  iw_priv_args

{

        __u32           cmd;            /* Number of the ioctl to issue */

        __u16           set_args;       /* Type and number of args */

        __u16           get_args;       /* Type and number of args */

        char            name[IFNAMSIZ]; /* Name of the extension */

};

#endif  /* _LINUX_WIRELESS_H */