348 lines
10 KiB
C
348 lines
10 KiB
C
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/*
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* This file define a set of standard wireless extensions
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*
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* Version : 7 23.4.99
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*
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* Authors : Jean Tourrilhes - HPLB - <jt@hplb.hpl.hp.com>
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*/
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#ifndef _LINUX_WIRELESS_H
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#define _LINUX_WIRELESS_H
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/************************** DOCUMENTATION **************************/
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/*
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* Basically, the wireless extensions are for now a set of standard ioctl
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* call + /proc/net/wireless
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*
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* The entry /proc/net/wireless give statistics and information on the
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* driver.
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* This is better than having each driver having its entry because
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* its centralised and we may remove the driver module safely.
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*
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* Ioctl are used to configure the driver and issue commands. This is
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* better than command line options of insmod because we may want to
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* change dynamically (while the driver is running) some parameters.
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*
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* The ioctl mechanimsm are copied from standard devices ioctl.
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* We have the list of command plus a structure descibing the
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* data exchanged...
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* Note that to add these ioctl, I was obliged to modify :
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* net/core/dev.c (two place + add include)
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* net/ipv4/af_inet.c (one place + add include)
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*
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* /proc/net/wireless is a copy of /proc/net/dev.
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* We have a structure for data passed from the driver to /proc/net/wireless
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* Too add this, I've modified :
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* net/core/dev.c (two other places)
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* include/linux/netdevice.h (one place)
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* include/linux/proc_fs.h (one place)
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*
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* Do not add here things that are redundant with other mechanisms
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* (drivers init, ifconfig, /proc/net/dev, ...) and with are not
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* wireless specific.
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*
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* These wireless extensions are not magic : each driver has to provide
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* support for them...
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*
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* IMPORTANT NOTE : As everything in the kernel, this is very much a
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* work in progress. Contact me if you have ideas of improvements...
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*/
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/***************************** INCLUDES *****************************/
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#if 0
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#include <linux/types.h> /* for "caddr_t" et al */
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#include <linux/socket.h> /* for "struct sockaddr" et al */
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#include <linux/if.h> /* for IFNAMSIZ and co... */
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#endif
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/**************************** CONSTANTS ****************************/
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/* --------------------------- VERSION --------------------------- */
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/*
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* This constant is used to know the availability of the wireless
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* extensions and to know which version of wireless extensions it is
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* (there is some stuff that will be added in the future...)
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* I just plan to increment with each new version.
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*/
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#define WIRELESS_EXT 6
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/*
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* Changes :
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*
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* V2 to V3
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* --------
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* Alan Cox start some incompatibles changes. I've integrated a bit more.
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* - Encryption renamed to Encode to avoid US regulation problems
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* - Frequency changed from float to struct to avoid problems on old 386
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*
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* V3 to V4
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* --------
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* - Add sensitivity
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*
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* V4 to V5
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* --------
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* - Missing encoding definitions in range
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* - Access points stuff
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*
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* V5 to V6
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* --------
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* - 802.11 support (ESSID ioctls)
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*
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* V6 to V7
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* --------
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* - define IW_ESSID_MAX_SIZE and IW_MAX_AP
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*/
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/* -------------------------- IOCTL LIST -------------------------- */
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/* Basic operations */
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#define SIOCSIWNAME 0x8B00 /* Unused ??? */
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#define SIOCGIWNAME 0x8B01 /* get name */
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#define SIOCSIWNWID 0x8B02 /* set network id */
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#define SIOCGIWNWID 0x8B03 /* get network id */
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#define SIOCSIWFREQ 0x8B04 /* set channel/frequency */
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#define SIOCGIWFREQ 0x8B05 /* get channel/frequency */
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#define SIOCSIWENCODE 0x8B06 /* set encoding info */
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#define SIOCGIWENCODE 0x8B07 /* get encoding info */
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#define SIOCSIWSENS 0x8B08 /* set sensitivity */
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#define SIOCGIWSENS 0x8B09 /* get sensitivity */
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/* Informative stuff */
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#define SIOCSIWRANGE 0x8B0A /* Unused ??? */
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#define SIOCGIWRANGE 0x8B0B /* Get range of parameters */
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#define SIOCSIWPRIV 0x8B0C /* Unused ??? */
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#define SIOCGIWPRIV 0x8B0D /* get private ioctl interface info */
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/* Mobile IP support */
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#define SIOCSIWSPY 0x8B10 /* set spy addresses */
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#define SIOCGIWSPY 0x8B11 /* get spy info (quality of link) */
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/* Access Point manipulation */
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#define SIOCSIWAP 0x8B14 /* set access point hardware addresses */
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#define SIOCGIWAP 0x8B15 /* get access point hardware addresses */
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#define SIOCGIWAPLIST 0x8B17 /* get list of access point in range */
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/* 802.11 specific support */
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#define SIOCSIWESSID 0x8B1A /* set ESSID (network name) */
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#define SIOCGIWESSID 0x8B1B /* get ESSID */
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/* As the ESSID is a string up to 32 bytes long, it doesn't fit within the
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* 'iwreq' structure, so we need to use the 'data' member to point to a
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* string in user space, like it is done for RANGE...
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* The "flags" member indicate if the ESSID is active or not.
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*/
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/* ------------------------- IOCTL STUFF ------------------------- */
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/* The first and the last (range) */
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#define SIOCIWFIRST 0x8B00
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#define SIOCIWLAST 0x8B1B
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/* Even : get (world access), odd : set (root access) */
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#define IW_IS_SET(cmd) (!((cmd) & 0x1))
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#define IW_IS_GET(cmd) ((cmd) & 0x1)
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/* ------------------------- PRIVATE INFO ------------------------- */
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/*
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* The following is used with SIOCGIWPRIV. It allow a driver to define
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* the interface (name, type of data) for its private ioctl.
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* Privates ioctl are SIOCDEVPRIVATE -> SIOCDEVPRIVATE + 0xF
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*/
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#define IW_PRIV_TYPE_MASK 0x7000 /* Type of arguments */
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#define IW_PRIV_TYPE_NONE 0x0000
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#define IW_PRIV_TYPE_BYTE 0x1000 /* Char as number */
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#define IW_PRIV_TYPE_CHAR 0x2000 /* Char as character */
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#define IW_PRIV_TYPE_INT 0x4000 /* 32 bits int */
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#define IW_PRIV_TYPE_FLOAT 0x5000
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#define IW_PRIV_SIZE_FIXED 0x0800 /* Variable or fixed nuber of args */
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#define IW_PRIV_SIZE_MASK 0x07FF /* Max number of those args */
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/*
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* Note : if the number of args is fixed and the size < 16 octets,
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* instead of passing a pointer we will put args in the iwreq struct...
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*/
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/* ----------------------- OTHER CONSTANTS ----------------------- */
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/* Maximum frequencies in the range struct */
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#define IW_MAX_FREQUENCIES 16
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/* Note : if you have something like 80 frequencies,
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* don't increase this constant and don't fill the frequency list.
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* The user will be able to set by channel anyway... */
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/* Maximum of address that you may set with SPY */
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#define IW_MAX_SPY 8
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/* Maximum of address that you may get in the
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list of access points in range */
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#define IW_MAX_AP 8
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/* Maximum size of the ESSID string */
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#define IW_ESSID_MAX_SIZE 32
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/****************************** TYPES ******************************/
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/* --------------------------- SUBTYPES --------------------------- */
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/*
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* A frequency
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* For numbers lower than 10^9, we encode the number in 'mant' and
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* set 'exp' to 0
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* For number greater than 10^9, we divide it by a power of 10.
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* The power of 10 is in 'exp', the result is in 'mant'.
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*/
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struct iw_freq
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{
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__u32 m; /* Mantissa */
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__u16 e; /* Exponent */
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};
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/*
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* Quality of the link
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*/
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struct iw_quality
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{
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__u8 qual; /* link quality (SNR or better...) */
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__u8 level; /* signal level */
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__u8 noise; /* noise level */
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__u8 updated; /* Flags to know if updated */
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};
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/*
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* Packet discarded in the wireless adapter due to
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* "wireless" specific problems...
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*/
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struct iw_discarded
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{
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__u32 nwid; /* Wrong nwid */
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__u32 code; /* Unable to code/decode */
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__u32 misc; /* Others cases */
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};
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/*
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* Encoding information (setting and so on)
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* Encoding might be hardware encryption, scrambing or others
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*/
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struct iw_encoding
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{
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__u8 method; /* Algorithm number / key used */
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__u64 code; /* Data/key used for algorithm */
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};
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/* ------------------------ WIRELESS STATS ------------------------ */
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/*
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* Wireless statistics (used for /proc/net/wireless)
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*/
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struct iw_statistics
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{
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__u8 status; /* Status
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* - device dependent for now */
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struct iw_quality qual; /* Quality of the link
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* (instant/mean/max) */
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struct iw_discarded discard; /* Packet discarded counts */
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};
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/* ------------------------ IOCTL REQUEST ------------------------ */
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/*
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* The structure to exchange data for ioctl.
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* This structure is the same as 'struct ifreq', but (re)defined for
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* convenience...
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*
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* Note that it should fit on the same memory footprint !
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* You should check this when increasing the above structures (16 octets)
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* 16 octets = 128 bits. Warning, pointers might be 64 bits wide...
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*/
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struct iwreq
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{
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union
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{
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char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
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} ifr_ifrn;
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/* Data part */
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union
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{
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/* Config - generic */
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char name[IFNAMSIZ];
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/* Name : used to verify the presence of wireless extensions.
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* Name of the protocol/provider... */
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struct /* network id (or domain) : used to to */
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{ /* create logical channels on the air */
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__u32 nwid; /* value */
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__u8 on; /* active/unactive nwid */
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} nwid;
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struct iw_freq freq; /* frequency or channel :
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* 0-1000 = channel
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* > 1000 = frequency in Hz */
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struct iw_encoding encoding; /* Encoding stuff */
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__u32 sensitivity; /* signal level threshold */
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struct sockaddr ap_addr; /* Access point address */
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struct /* For all data bigger than 16 octets */
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{
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caddr_t pointer; /* Pointer to the data
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* (in user space) */
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__u16 length; /* fields or byte size */
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__u16 flags; /* Optional params */
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} data;
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} u;
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};
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/* -------------------------- IOCTL DATA -------------------------- */
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/*
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* For those ioctl which want to exchange mode data that what could
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* fit in the above structure...
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*/
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/*
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* Range of parameters
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*/
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struct iw_range
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{
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/* Informative stuff (to choose between different interface) */
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__u32 throughput; /* To give an idea... */
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/* NWID (or domain id) */
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__u32 min_nwid; /* Minimal NWID we are able to set */
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__u32 max_nwid; /* Maximal NWID we are able to set */
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/* Frequency */
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__u16 num_channels; /* Number of channels [0; num - 1] */
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__u8 num_frequency; /* Number of entry in the list */
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struct iw_freq freq[IW_MAX_FREQUENCIES]; /* list */
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/* Note : this frequency list doesn't need to fit channel numbers */
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/* signal level threshold range */
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__u32 sensitivity;
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/* Quality of link & SNR stuff */
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struct iw_quality max_qual; /* Quality of the link */
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/* Encoder stuff */
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struct iw_encoding max_encoding; /* Encoding max range */
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};
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/*
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* Private ioctl interface information
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*/
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struct iw_priv_args
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{
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__u32 cmd; /* Number of the ioctl to issue */
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__u16 set_args; /* Type and number of args */
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__u16 get_args; /* Type and number of args */
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char name[IFNAMSIZ]; /* Name of the extension */
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};
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#endif /* _LINUX_WIRELESS_H */
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