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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [net/] [core/] [wireless.c] - Blame information for rev 1775

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/*
 * This file implement the Wireless Extensions APIs.
 *
 * Authors :    Jean Tourrilhes - HPL - <jt@hpl.hp.com>
 * Copyright (c) 1997-2003 Jean Tourrilhes, All Rights Reserved.
 *
 * (As all part of the Linux kernel, this file is GPL)
 */
 
/************************** DOCUMENTATION **************************/
/*
 * API definition :
 * --------------
 * See <linux/wireless.h> for details of the APIs and the rest.
 *
 * History :
 * -------
 *
 * v1 - 5.12.01 - Jean II
 *      o Created this file.
 *
 * v2 - 13.12.01 - Jean II
 *      o Move /proc/net/wireless stuff from net/core/dev.c to here
 *      o Make Wireless Extension IOCTLs go through here
 *      o Added iw_handler handling ;-)
 *      o Added standard ioctl description
 *      o Initial dumb commit strategy based on orinoco.c
 *
 * v3 - 19.12.01 - Jean II
 *      o Make sure we don't go out of standard_ioctl[] in ioctl_standard_call
 *      o Add event dispatcher function
 *      o Add event description
 *      o Propagate events as rtnetlink IFLA_WIRELESS option
 *      o Generate event on selected SET requests
 *
 * v4 - 18.04.02 - Jean II
 *      o Fix stupid off by one in iw_ioctl_description : IW_ESSID_MAX_SIZE + 1
 *
 * v5 - 21.06.02 - Jean II
 *      o Add IW_PRIV_TYPE_ADDR in priv_type_size (+cleanup)
 *      o Reshuffle IW_HEADER_TYPE_XXX to map IW_PRIV_TYPE_XXX changes
 *      o Add IWEVCUSTOM for driver specific event/scanning token
 *      o Turn on WE_STRICT_WRITE by default + kernel warning
 *      o Fix WE_STRICT_WRITE in ioctl_export_private() (32 => iw_num)
 *      o Fix off-by-one in test (extra_size <= IFNAMSIZ)
 *
 * v6 - 9.01.03 - Jean II
 *      o Add common spy support : iw_handler_set_spy(), wireless_spy_update()
 *      o Add enhanced spy support : iw_handler_set_thrspy() and event.
 *      o Add WIRELESS_EXT version display in /proc/net/wireless
 */
 
/***************************** INCLUDES *****************************/
 
#include <asm/uaccess.h>                /* copy_to_user() */
#include <linux/config.h>               /* Not needed ??? */
#include <linux/types.h>                /* off_t */
#include <linux/netdevice.h>            /* struct ifreq, dev_get_by_name() */
#include <linux/rtnetlink.h>            /* rtnetlink stuff */
#include <linux/if_arp.h>               /* ARPHRD_ETHER */
 
#include <linux/wireless.h>             /* Pretty obvious */
#include <net/iw_handler.h>             /* New driver API */
 
/**************************** CONSTANTS ****************************/
 
/* Enough lenience, let's make sure things are proper... */
#define WE_STRICT_WRITE         /* Check write buffer size */
/* I'll probably drop both the define and kernel message in the next version */
 
/* Debuging stuff */
#undef WE_IOCTL_DEBUG           /* Debug IOCTL API */
#undef WE_EVENT_DEBUG           /* Debug Event dispatcher */
#undef WE_SPY_DEBUG             /* Debug enhanced spy support */
 
/* Options */
#define WE_EVENT_NETLINK        /* Propagate events using rtnetlink */
#define WE_SET_EVENT            /* Generate an event on some set commands */
 
/************************* GLOBAL VARIABLES *************************/
/*
 * You should not use global variables, because of re-entrancy.
 * On our case, it's only const, so it's OK...
 */
/*
 * Meta-data about all the standard Wireless Extension request we
 * know about.
 */
static const struct iw_ioctl_description        standard_ioctl[] = {
        /* SIOCSIWCOMMIT */
        { IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
        /* SIOCGIWNAME */
        { IW_HEADER_TYPE_CHAR, 0, 0, 0, 0, IW_DESCR_FLAG_DUMP},
        /* SIOCSIWNWID */
        { IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, IW_DESCR_FLAG_EVENT},
        /* SIOCGIWNWID */
        { IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, IW_DESCR_FLAG_DUMP},
        /* SIOCSIWFREQ */
        { IW_HEADER_TYPE_FREQ, 0, 0, 0, 0, IW_DESCR_FLAG_EVENT},
        /* SIOCGIWFREQ */
        { IW_HEADER_TYPE_FREQ, 0, 0, 0, 0, IW_DESCR_FLAG_DUMP},
        /* SIOCSIWMODE */
        { IW_HEADER_TYPE_UINT, 0, 0, 0, 0, IW_DESCR_FLAG_EVENT},
        /* SIOCGIWMODE */
        { IW_HEADER_TYPE_UINT, 0, 0, 0, 0, IW_DESCR_FLAG_DUMP},
        /* SIOCSIWSENS */
        { IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
        /* SIOCGIWSENS */
        { IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
        /* SIOCSIWRANGE */
        { IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
        /* SIOCGIWRANGE */
        { IW_HEADER_TYPE_POINT, 0, 1, 0, sizeof(struct iw_range), IW_DESCR_FLAG_DUMP},
        /* SIOCSIWPRIV */
        { IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
        /* SIOCGIWPRIV (handled directly by us) */
        { IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
        /* SIOCSIWSTATS */
        { IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
        /* SIOCGIWSTATS (handled directly by us) */
        { IW_HEADER_TYPE_NULL, 0, 0, 0, 0, IW_DESCR_FLAG_DUMP},
        /* SIOCSIWSPY */
        { IW_HEADER_TYPE_POINT, 0, sizeof(struct sockaddr), 0, IW_MAX_SPY, 0},
        /* SIOCGIWSPY */
        { IW_HEADER_TYPE_POINT, 0, (sizeof(struct sockaddr) + sizeof(struct iw_quality)), 0, IW_MAX_SPY, 0},
        /* SIOCSIWTHRSPY */
        { IW_HEADER_TYPE_POINT, 0, sizeof(struct iw_thrspy), 1, 1, 0},
        /* SIOCGIWTHRSPY */
        { IW_HEADER_TYPE_POINT, 0, sizeof(struct iw_thrspy), 1, 1, 0},
        /* SIOCSIWAP */
        { IW_HEADER_TYPE_ADDR, 0, 0, 0, 0, 0},
        /* SIOCGIWAP */
        { IW_HEADER_TYPE_ADDR, 0, 0, 0, 0, IW_DESCR_FLAG_DUMP},
        /* -- hole -- */
        { IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
        /* SIOCGIWAPLIST */
        { IW_HEADER_TYPE_POINT, 0, (sizeof(struct sockaddr) + sizeof(struct iw_quality)), 0, IW_MAX_AP, 0},
        /* SIOCSIWSCAN */
        { IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
        /* SIOCGIWSCAN */
        { IW_HEADER_TYPE_POINT, 0, 1, 0, IW_SCAN_MAX_DATA, 0},
        /* SIOCSIWESSID */
        { IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ESSID_MAX_SIZE + 1, IW_DESCR_FLAG_EVENT},
        /* SIOCGIWESSID */
        { IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ESSID_MAX_SIZE + 1, IW_DESCR_FLAG_DUMP},
        /* SIOCSIWNICKN */
        { IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ESSID_MAX_SIZE + 1, 0},
        /* SIOCGIWNICKN */
        { IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ESSID_MAX_SIZE + 1, 0},
        /* -- hole -- */
        { IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
        /* -- hole -- */
        { IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
        /* SIOCSIWRATE */
        { IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
        /* SIOCGIWRATE */
        { IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
        /* SIOCSIWRTS */
        { IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
        /* SIOCGIWRTS */
        { IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
        /* SIOCSIWFRAG */
        { IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
        /* SIOCGIWFRAG */
        { IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
        /* SIOCSIWTXPOW */
        { IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
        /* SIOCGIWTXPOW */
        { IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
        /* SIOCSIWRETRY */
        { IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
        /* SIOCGIWRETRY */
        { IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
        /* SIOCSIWENCODE */
        { IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ENCODING_TOKEN_MAX, IW_DESCR_FLAG_EVENT | IW_DESCR_FLAG_RESTRICT},
        /* SIOCGIWENCODE */
        { IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ENCODING_TOKEN_MAX, IW_DESCR_FLAG_DUMP | IW_DESCR_FLAG_RESTRICT},
        /* SIOCSIWPOWER */
        { IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
        /* SIOCGIWPOWER */
        { IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
};
static const int standard_ioctl_num = (sizeof(standard_ioctl) /
                                       sizeof(struct iw_ioctl_description));
 
/*
 * Meta-data about all the additional standard Wireless Extension events
 * we know about.
 */
static const struct iw_ioctl_description        standard_event[] = {
        /* IWEVTXDROP */
        { IW_HEADER_TYPE_ADDR, 0, 0, 0, 0, 0},
        /* IWEVQUAL */
        { IW_HEADER_TYPE_QUAL, 0, 0, 0, 0, 0},
        /* IWEVCUSTOM */
        { IW_HEADER_TYPE_POINT, 0, 1, 0, IW_CUSTOM_MAX, 0},
        /* IWEVREGISTERED */
        { IW_HEADER_TYPE_ADDR, 0, 0, 0, 0, 0},
        /* IWEVEXPIRED */
        { IW_HEADER_TYPE_ADDR, 0, 0, 0, 0, 0},
};
static const int standard_event_num = (sizeof(standard_event) /
                                       sizeof(struct iw_ioctl_description));
 
/* Size (in bytes) of the various private data types */
static const char priv_type_size[] = {
        0,                               /* IW_PRIV_TYPE_NONE */
        1,                              /* IW_PRIV_TYPE_BYTE */
        1,                              /* IW_PRIV_TYPE_CHAR */
        0,                               /* Not defined */
        sizeof(__u32),                  /* IW_PRIV_TYPE_INT */
        sizeof(struct iw_freq),         /* IW_PRIV_TYPE_FLOAT */
        sizeof(struct sockaddr),        /* IW_PRIV_TYPE_ADDR */
        0,                               /* Not defined */
};
 
/* Size (in bytes) of various events */
static const int event_type_size[] = {
        IW_EV_LCP_LEN,                  /* IW_HEADER_TYPE_NULL */
        0,
        IW_EV_CHAR_LEN,                 /* IW_HEADER_TYPE_CHAR */
        0,
        IW_EV_UINT_LEN,                 /* IW_HEADER_TYPE_UINT */
        IW_EV_FREQ_LEN,                 /* IW_HEADER_TYPE_FREQ */
        IW_EV_ADDR_LEN,                 /* IW_HEADER_TYPE_ADDR */
        0,
        IW_EV_POINT_LEN,                /* Without variable payload */
        IW_EV_PARAM_LEN,                /* IW_HEADER_TYPE_PARAM */
        IW_EV_QUAL_LEN,                 /* IW_HEADER_TYPE_QUAL */
};
 
/************************ COMMON SUBROUTINES ************************/
/*
 * Stuff that may be used in various place or doesn't fit in one
 * of the section below.
 */
 
/* ---------------------------------------------------------------- */
/*
 * Return the driver handler associated with a specific Wireless Extension.
 * Called from various place, so make sure it remains efficient.
 */
static inline iw_handler get_handler(struct net_device *dev,
                                     unsigned int cmd)
{
        /* Don't "optimise" the following variable, it will crash */
        unsigned int    index;          /* *MUST* be unsigned */
 
        /* Check if we have some wireless handlers defined */
        if(dev->wireless_handlers == NULL)
                return NULL;
 
        /* Try as a standard command */
        index = cmd - SIOCIWFIRST;
        if(index < dev->wireless_handlers->num_standard)
                return dev->wireless_handlers->standard[index];
 
        /* Try as a private command */
        index = cmd - SIOCIWFIRSTPRIV;
        if(index < dev->wireless_handlers->num_private)
                return dev->wireless_handlers->private[index];
 
        /* Not found */
        return NULL;
}
 
/* ---------------------------------------------------------------- */
/*
 * Get statistics out of the driver
 */
static inline struct iw_statistics *get_wireless_stats(struct net_device *dev)
{
        return (dev->get_wireless_stats ?
                dev->get_wireless_stats(dev) :
                (struct iw_statistics *) NULL);
        /* In the future, get_wireless_stats may move from 'struct net_device'
         * to 'struct iw_handler_def', to de-bloat struct net_device.
         * Definitely worse a thought... */
}
 
/* ---------------------------------------------------------------- */
/*
 * Call the commit handler in the driver
 * (if exist and if conditions are right)
 *
 * Note : our current commit strategy is currently pretty dumb,
 * but we will be able to improve on that...
 * The goal is to try to agreagate as many changes as possible
 * before doing the commit. Drivers that will define a commit handler
 * are usually those that need a reset after changing parameters, so
 * we want to minimise the number of reset.
 * A cool idea is to use a timer : at each "set" command, we re-set the
 * timer, when the timer eventually fires, we call the driver.
 * Hopefully, more on that later.
 *
 * Also, I'm waiting to see how many people will complain about the
 * netif_running(dev) test. I'm open on that one...
 * Hopefully, the driver will remember to do a commit in "open()" ;-)
 */
static inline int call_commit_handler(struct net_device *       dev)
{
        if((netif_running(dev)) &&
           (dev->wireless_handlers->standard[0] != NULL)) {
                /* Call the commit handler on the driver */
                return dev->wireless_handlers->standard[0](dev, NULL,
                                                           NULL, NULL);
        } else
                return 0;                /* Command completed successfully */
}
 
/* ---------------------------------------------------------------- */
/*
 * Number of private arguments
 */
static inline int get_priv_size(__u16   args)
{
        int     num = args & IW_PRIV_SIZE_MASK;
        int     type = (args & IW_PRIV_TYPE_MASK) >> 12;
 
        return num * priv_type_size[type];
}
 
 
/******************** /proc/net/wireless SUPPORT ********************/
/*
 * The /proc/net/wireless file is a human readable user-space interface
 * exporting various wireless specific statistics from the wireless devices.
 * This is the most popular part of the Wireless Extensions ;-)
 *
 * This interface is a pure clone of /proc/net/dev (in net/core/dev.c).
 * The content of the file is basically the content of "struct iw_statistics".
 */
 
#ifdef CONFIG_PROC_FS
 
/* ---------------------------------------------------------------- */
/*
 * Print one entry (line) of /proc/net/wireless
 */
static inline int sprintf_wireless_stats(char *buffer, struct net_device *dev)
{
        /* Get stats from the driver */
        struct iw_statistics *stats;
        int size;
 
        stats = get_wireless_stats(dev);
        if (stats != (struct iw_statistics *) NULL) {
                size = sprintf(buffer,
                               "%6s: %04x  %3d%c  %3d%c  %3d%c  %6d %6d %6d %6d %6d   %6d\n",
                               dev->name,
                               stats->status,
                               stats->qual.qual,
                               stats->qual.updated & 1 ? '.' : ' ',
                               ((__u8) stats->qual.level),
                               stats->qual.updated & 2 ? '.' : ' ',
                               ((__u8) stats->qual.noise),
                               stats->qual.updated & 4 ? '.' : ' ',
                               stats->discard.nwid,
                               stats->discard.code,
                               stats->discard.fragment,
                               stats->discard.retries,
                               stats->discard.misc,
                               stats->miss.beacon);
                stats->qual.updated = 0;
        }
        else
                size = 0;
 
        return size;
}
 
/* ---------------------------------------------------------------- */
/*
 * Print info for /proc/net/wireless (print all entries)
 */
int dev_get_wireless_info(char * buffer, char **start, off_t offset,
                          int length)
{
        int             len = 0;
        off_t           begin = 0;
        off_t           pos = 0;
        int             size;
 
        struct net_device *     dev;
 
        size = sprintf(buffer,
                       "Inter-| sta-|   Quality        |   Discarded packets               | Missed | WE\n"
                       " face | tus | link level noise |  nwid  crypt   frag  retry   misc | beacon | %d\n",
                       WIRELESS_EXT);
 
        pos += size;
        len += size;
 
        read_lock(&dev_base_lock);
        for (dev = dev_base; dev != NULL; dev = dev->next) {
                size = sprintf_wireless_stats(buffer + len, dev);
                len += size;
                pos = begin + len;
 
                if (pos < offset) {
                        len = 0;
                        begin = pos;
                }
                if (pos > offset + length)
                        break;
        }
        read_unlock(&dev_base_lock);
 
        *start = buffer + (offset - begin);     /* Start of wanted data */
        len -= (offset - begin);                /* Start slop */
        if (len > length)
                len = length;                   /* Ending slop */
        if (len < 0)
                len = 0;
 
        return len;
}
#endif  /* CONFIG_PROC_FS */
 
/************************** IOCTL SUPPORT **************************/
/*
 * The original user space API to configure all those Wireless Extensions
 * is through IOCTLs.
 * In there, we check if we need to call the new driver API (iw_handler)
 * or just call the driver ioctl handler.
 */
 
/* ---------------------------------------------------------------- */
/*
 *      Allow programatic access to /proc/net/wireless even if /proc
 *      doesn't exist... Also more efficient...
 */
static inline int dev_iwstats(struct net_device *dev, struct ifreq *ifr)
{
        /* Get stats from the driver */
        struct iw_statistics *stats;
 
        stats = get_wireless_stats(dev);
        if (stats != (struct iw_statistics *) NULL) {
                struct iwreq *  wrq = (struct iwreq *)ifr;
 
                /* Copy statistics to the user buffer */
                if(copy_to_user(wrq->u.data.pointer, stats,
                                sizeof(struct iw_statistics)))
                        return -EFAULT;
 
                /* Check if we need to clear the update flag */
                if(wrq->u.data.flags != 0)
                        stats->qual.updated = 0;
                return 0;
        } else
                return -EOPNOTSUPP;
}
 
/* ---------------------------------------------------------------- */
/*
 * Export the driver private handler definition
 * They will be picked up by tools like iwpriv...
 */
static inline int ioctl_export_private(struct net_device *      dev,
                                       struct ifreq *           ifr)
{
        struct iwreq *                          iwr = (struct iwreq *) ifr;
 
        /* Check if the driver has something to export */
        if((dev->wireless_handlers->num_private_args == 0) ||
           (dev->wireless_handlers->private_args == NULL))
                return -EOPNOTSUPP;
 
        /* Check NULL pointer */
        if(iwr->u.data.pointer == NULL)
                return -EFAULT;
#ifdef WE_STRICT_WRITE
        /* Check if there is enough buffer up there */
        if(iwr->u.data.length < dev->wireless_handlers->num_private_args) {
                printk(KERN_ERR "%s (WE) : Buffer for request SIOCGIWPRIV too small (%d<%d)\n", dev->name, iwr->u.data.length, dev->wireless_handlers->num_private_args);
                return -E2BIG;
        }
#endif  /* WE_STRICT_WRITE */
 
        /* Set the number of available ioctls. */
        iwr->u.data.length = dev->wireless_handlers->num_private_args;
 
        /* Copy structure to the user buffer. */
        if (copy_to_user(iwr->u.data.pointer,
                         dev->wireless_handlers->private_args,
                         sizeof(struct iw_priv_args) * iwr->u.data.length))
                return -EFAULT;
 
        return 0;
}
 
/* ---------------------------------------------------------------- */
/*
 * Wrapper to call a standard Wireless Extension handler.
 * We do various checks and also take care of moving data between
 * user space and kernel space.
 */
static inline int ioctl_standard_call(struct net_device *       dev,
                                      struct ifreq *            ifr,
                                      unsigned int              cmd,
                                      iw_handler                handler)
{
        struct iwreq *                          iwr = (struct iwreq *) ifr;
        const struct iw_ioctl_description *     descr;
        struct iw_request_info                  info;
        int                                     ret = -EINVAL;
        int                                     user_size = 0;
 
        /* Get the description of the IOCTL */
        if((cmd - SIOCIWFIRST) >= standard_ioctl_num)
                return -EOPNOTSUPP;
        descr = &(standard_ioctl[cmd - SIOCIWFIRST]);
 
#ifdef WE_IOCTL_DEBUG
        printk(KERN_DEBUG "%s (WE) : Found standard handler for 0x%04X\n",
               ifr->ifr_name, cmd);
        printk(KERN_DEBUG "%s (WE) : Header type : %d, Token type : %d, size : %d, token : %d\n", dev->name, descr->header_type, descr->token_type, descr->token_size, descr->max_tokens);
#endif  /* WE_IOCTL_DEBUG */
 
        /* Prepare the call */
        info.cmd = cmd;
        info.flags = 0;
 
        /* Check if we have a pointer to user space data or not */
        if(descr->header_type != IW_HEADER_TYPE_POINT) {
 
                /* No extra arguments. Trivial to handle */
                ret = handler(dev, &info, &(iwr->u), NULL);
 
#ifdef WE_SET_EVENT
                /* Generate an event to notify listeners of the change */
                if((descr->flags & IW_DESCR_FLAG_EVENT) &&
                   ((ret == 0) || (ret == -EIWCOMMIT)))
                        wireless_send_event(dev, cmd, &(iwr->u), NULL);
#endif  /* WE_SET_EVENT */
        } else {
                char *  extra;
                int     err;
 
                /* Check what user space is giving us */
                if(IW_IS_SET(cmd)) {
                        /* Check NULL pointer */
                        if((iwr->u.data.pointer == NULL) &&
                           (iwr->u.data.length != 0))
                                return -EFAULT;
                        /* Check if number of token fits within bounds */
                        if(iwr->u.data.length > descr->max_tokens)
                                return -E2BIG;
                        if(iwr->u.data.length < descr->min_tokens)
                                return -EINVAL;
                } else {
                        /* Check NULL pointer */
                        if(iwr->u.data.pointer == NULL)
                                return -EFAULT;
                        /* Save user space buffer size for checking */
                        user_size = iwr->u.data.length;
                }
 
#ifdef WE_IOCTL_DEBUG
                printk(KERN_DEBUG "%s (WE) : Malloc %d bytes\n",
                       dev->name, descr->max_tokens * descr->token_size);
#endif  /* WE_IOCTL_DEBUG */
 
                /* Always allocate for max space. Easier, and won't last
                 * long... */
                extra = kmalloc(descr->max_tokens * descr->token_size,
                                GFP_KERNEL);
                if (extra == NULL) {
                        return -ENOMEM;
                }
 
                /* If it is a SET, get all the extra data in here */
                if(IW_IS_SET(cmd) && (iwr->u.data.length != 0)) {
                        err = copy_from_user(extra, iwr->u.data.pointer,
                                             iwr->u.data.length *
                                             descr->token_size);
                        if (err) {
                                kfree(extra);
                                return -EFAULT;
                        }
#ifdef WE_IOCTL_DEBUG
                        printk(KERN_DEBUG "%s (WE) : Got %d bytes\n",
                               dev->name,
                               iwr->u.data.length * descr->token_size);
#endif  /* WE_IOCTL_DEBUG */
                }
 
                /* Call the handler */
                ret = handler(dev, &info, &(iwr->u), extra);
 
                /* If we have something to return to the user */
                if (!ret && IW_IS_GET(cmd)) {
#ifdef WE_STRICT_WRITE
                        /* Check if there is enough buffer up there */
                        if(user_size < iwr->u.data.length) {
                                printk(KERN_ERR "%s (WE) : Buffer for request %04X too small (%d<%d)\n", dev->name, cmd, user_size, iwr->u.data.length);
                                kfree(extra);
                                return -E2BIG;
                        }
#endif  /* WE_STRICT_WRITE */
 
                        err = copy_to_user(iwr->u.data.pointer, extra,
                                           iwr->u.data.length *
                                           descr->token_size);
                        if (err)
                                ret =  -EFAULT;
#ifdef WE_IOCTL_DEBUG
                        printk(KERN_DEBUG "%s (WE) : Wrote %d bytes\n",
                               dev->name,
                               iwr->u.data.length * descr->token_size);
#endif  /* WE_IOCTL_DEBUG */
                }
 
#ifdef WE_SET_EVENT
                /* Generate an event to notify listeners of the change */
                if((descr->flags & IW_DESCR_FLAG_EVENT) &&
                   ((ret == 0) || (ret == -EIWCOMMIT))) {
                        if(descr->flags & IW_DESCR_FLAG_RESTRICT)
                                /* If the event is restricted, don't
                                 * export the payload */
                                wireless_send_event(dev, cmd, &(iwr->u), NULL);
                        else
                                wireless_send_event(dev, cmd, &(iwr->u),
                                                    extra);
                }
#endif  /* WE_SET_EVENT */
 
                /* Cleanup - I told you it wasn't that long ;-) */
                kfree(extra);
        }
 
        /* Call commit handler if needed and defined */
        if(ret == -EIWCOMMIT)
                ret = call_commit_handler(dev);
 
        /* Here, we will generate the appropriate event if needed */
 
        return ret;
}
 
/* ---------------------------------------------------------------- */
/*
 * Wrapper to call a private Wireless Extension handler.
 * We do various checks and also take care of moving data between
 * user space and kernel space.
 * It's not as nice and slimline as the standard wrapper. The cause
 * is struct iw_priv_args, which was not really designed for the
 * job we are going here.
 *
 * IMPORTANT : This function prevent to set and get data on the same
 * IOCTL and enforce the SET/GET convention. Not doing it would be
 * far too hairy...
 * If you need to set and get data at the same time, please don't use
 * a iw_handler but process it in your ioctl handler (i.e. use the
 * old driver API).
 */
static inline int ioctl_private_call(struct net_device *        dev,
                                     struct ifreq *             ifr,
                                     unsigned int               cmd,
                                     iw_handler         handler)
{
        struct iwreq *                  iwr = (struct iwreq *) ifr;
        struct iw_priv_args *           descr = NULL;
        struct iw_request_info          info;
        int                             extra_size = 0;
        int                             i;
        int                             ret = -EINVAL;
 
        /* Get the description of the IOCTL */
        for(i = 0; i < dev->wireless_handlers->num_private_args; i++)
                if(cmd == dev->wireless_handlers->private_args[i].cmd) {
                        descr = &(dev->wireless_handlers->private_args[i]);
                        break;
                }
 
#ifdef WE_IOCTL_DEBUG
        printk(KERN_DEBUG "%s (WE) : Found private handler for 0x%04X\n",
               ifr->ifr_name, cmd);
        if(descr) {
                printk(KERN_DEBUG "%s (WE) : Name %s, set %X, get %X\n",
                       dev->name, descr->name,
                       descr->set_args, descr->get_args);
        }
#endif  /* WE_IOCTL_DEBUG */
 
        /* Compute the size of the set/get arguments */
        if(descr != NULL) {
                if(IW_IS_SET(cmd)) {
                        int     offset = 0;      /* For sub-ioctls */
                        /* Check for sub-ioctl handler */
                        if(descr->name[0] == '\0')
                                /* Reserve one int for sub-ioctl index */
                                offset = sizeof(__u32);
 
                        /* Size of set arguments */
                        extra_size = get_priv_size(descr->set_args);
 
                        /* Does it fits in iwr ? */
                        if((descr->set_args & IW_PRIV_SIZE_FIXED) &&
                           ((extra_size + offset) <= IFNAMSIZ))
                                extra_size = 0;
                } else {
                        /* Size of set arguments */
                        extra_size = get_priv_size(descr->get_args);
 
                        /* Does it fits in iwr ? */
                        if((descr->get_args & IW_PRIV_SIZE_FIXED) &&
                           (extra_size <= IFNAMSIZ))
                                extra_size = 0;
                }
        }
 
        /* Prepare the call */
        info.cmd = cmd;
        info.flags = 0;
 
        /* Check if we have a pointer to user space data or not. */
        if(extra_size == 0) {
                /* No extra arguments. Trivial to handle */
                ret = handler(dev, &info, &(iwr->u), (char *) &(iwr->u));
        } else {
                char *  extra;
                int     err;
 
                /* Check what user space is giving us */
                if(IW_IS_SET(cmd)) {
                        /* Check NULL pointer */
                        if((iwr->u.data.pointer == NULL) &&
                           (iwr->u.data.length != 0))
                                return -EFAULT;
 
                        /* Does it fits within bounds ? */
                        if(iwr->u.data.length > (descr->set_args &
                                                 IW_PRIV_SIZE_MASK))
                                return -E2BIG;
                } else {
                        /* Check NULL pointer */
                        if(iwr->u.data.pointer == NULL)
                                return -EFAULT;
                }
 
#ifdef WE_IOCTL_DEBUG
                printk(KERN_DEBUG "%s (WE) : Malloc %d bytes\n",
                       dev->name, extra_size);
#endif  /* WE_IOCTL_DEBUG */
 
                /* Always allocate for max space. Easier, and won't last
                 * long... */
                extra = kmalloc(extra_size, GFP_KERNEL);
                if (extra == NULL) {
                        return -ENOMEM;
                }
 
                /* If it is a SET, get all the extra data in here */
                if(IW_IS_SET(cmd) && (iwr->u.data.length != 0)) {
                        err = copy_from_user(extra, iwr->u.data.pointer,
                                             extra_size);
                        if (err) {
                                kfree(extra);
                                return -EFAULT;
                        }
#ifdef WE_IOCTL_DEBUG
                        printk(KERN_DEBUG "%s (WE) : Got %d elem\n",
                               dev->name, iwr->u.data.length);
#endif  /* WE_IOCTL_DEBUG */
                }
 
                /* Call the handler */
                ret = handler(dev, &info, &(iwr->u), extra);
 
                /* If we have something to return to the user */
                if (!ret && IW_IS_GET(cmd)) {
                        err = copy_to_user(iwr->u.data.pointer, extra,
                                           extra_size);
                        if (err)
                                ret =  -EFAULT;
#ifdef WE_IOCTL_DEBUG
                        printk(KERN_DEBUG "%s (WE) : Wrote %d elem\n",
                               dev->name, iwr->u.data.length);
#endif  /* WE_IOCTL_DEBUG */
                }
 
                /* Cleanup - I told you it wasn't that long ;-) */
                kfree(extra);
        }
 
 
        /* Call commit handler if needed and defined */
        if(ret == -EIWCOMMIT)
                ret = call_commit_handler(dev);
 
        return ret;
}
 
/* ---------------------------------------------------------------- */
/*
 * Main IOCTl dispatcher. Called from the main networking code
 * (dev_ioctl() in net/core/dev.c).
 * Check the type of IOCTL and call the appropriate wrapper...
 */
int wireless_process_ioctl(struct ifreq *ifr, unsigned int cmd)
{
        struct net_device *dev;
        iw_handler      handler;
 
        /* Permissions are already checked in dev_ioctl() before calling us.
         * The copy_to/from_user() of ifr is also dealt with in there */
 
        /* Make sure the device exist */
        if ((dev = __dev_get_by_name(ifr->ifr_name)) == NULL)
                return -ENODEV;
 
        /* A bunch of special cases, then the generic case...
         * Note that 'cmd' is already filtered in dev_ioctl() with
         * (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) */
        switch(cmd)
        {
                case SIOCGIWSTATS:
                        /* Get Wireless Stats */
                        return dev_iwstats(dev, ifr);
 
                case SIOCGIWPRIV:
                        /* Check if we have some wireless handlers defined */
                        if(dev->wireless_handlers != NULL) {
                                /* We export to user space the definition of
                                 * the private handler ourselves */
                                return ioctl_export_private(dev, ifr);
                        }
                        // ## Fall-through for old API ##
                default:
                        /* Generic IOCTL */
                        /* Basic check */
                        if (!netif_device_present(dev))
                                return -ENODEV;
                        /* New driver API : try to find the handler */
                        handler = get_handler(dev, cmd);
                        if(handler != NULL) {
                                /* Standard and private are not the same */
                                if(cmd < SIOCIWFIRSTPRIV)
                                        return ioctl_standard_call(dev,
                                                                   ifr,
                                                                   cmd,
                                                                   handler);
                                else
                                        return ioctl_private_call(dev,
                                                                  ifr,
                                                                  cmd,
                                                                  handler);
                        }
                        /* Old driver API : call driver ioctl handler */
                        if (dev->do_ioctl) {
                                return dev->do_ioctl(dev, ifr, cmd);
                        }
                        return -EOPNOTSUPP;
        }
        /* Not reached */
        return -EINVAL;
}
 
/************************* EVENT PROCESSING *************************/
/*
 * Process events generated by the wireless layer or the driver.
 * Most often, the event will be propagated through rtnetlink
 */
 
#ifdef WE_EVENT_NETLINK
/* "rtnl" is defined in net/core/rtnetlink.c, but we need it here.
 * It is declared in <linux/rtnetlink.h> */
 
/* ---------------------------------------------------------------- */
/*
 * Fill a rtnetlink message with our event data.
 * Note that we propage only the specified event and don't dump the
 * current wireless config. Dumping the wireless config is far too
 * expensive (for each parameter, the driver need to query the hardware).
 */
static inline int rtnetlink_fill_iwinfo(struct sk_buff *        skb,
                                        struct net_device *     dev,
                                        int                     type,
                                        char *                  event,
                                        int                     event_len)
{
        struct ifinfomsg *r;
        struct nlmsghdr  *nlh;
        unsigned char    *b = skb->tail;
 
        nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(*r));
        r = NLMSG_DATA(nlh);
        r->ifi_family = AF_UNSPEC;
        r->ifi_type = dev->type;
        r->ifi_index = dev->ifindex;
        r->ifi_flags = dev->flags;
        r->ifi_change = 0;       /* Wireless changes don't affect those flags */
 
        /* Add the wireless events in the netlink packet */
        RTA_PUT(skb, IFLA_WIRELESS,
                event_len, event);
 
        nlh->nlmsg_len = skb->tail - b;
        return skb->len;
 
nlmsg_failure:
rtattr_failure:
        skb_trim(skb, b - skb->data);
        return -1;
}
 
/* ---------------------------------------------------------------- */
/*
 * Create and broadcast and send it on the standard rtnetlink socket
 * This is a pure clone rtmsg_ifinfo() in net/core/rtnetlink.c
 * Andrzej Krzysztofowicz mandated that I used a IFLA_XXX field
 * within a RTM_NEWLINK event.
 */
static inline void rtmsg_iwinfo(struct net_device *     dev,
                                char *                  event,
                                int                     event_len)
{
        struct sk_buff *skb;
        int size = NLMSG_GOODSIZE;
 
        skb = alloc_skb(size, GFP_ATOMIC);
        if (!skb)
                return;
 
        if (rtnetlink_fill_iwinfo(skb, dev, RTM_NEWLINK,
                                  event, event_len) < 0) {
                kfree_skb(skb);
                return;
        }
        NETLINK_CB(skb).dst_groups = RTMGRP_LINK;
        netlink_broadcast(rtnl, skb, 0, RTMGRP_LINK, GFP_ATOMIC);
}
#endif  /* WE_EVENT_NETLINK */
 
/* ---------------------------------------------------------------- */
/*
 * Main event dispatcher. Called from other parts and drivers.
 * Send the event on the apropriate channels.
 * May be called from interrupt context.
 */
void wireless_send_event(struct net_device *    dev,
                         unsigned int           cmd,
                         union iwreq_data *     wrqu,
                         char *                 extra)
{
        const struct iw_ioctl_description *     descr = NULL;
        int extra_len = 0;
        struct iw_event  *event;                /* Mallocated whole event */
        int event_len;                          /* Its size */
        int hdr_len;                            /* Size of the event header */
        /* Don't "optimise" the following variable, it will crash */
        unsigned        cmd_index;              /* *MUST* be unsigned */
 
        /* Get the description of the IOCTL */
        if(cmd <= SIOCIWLAST) {
                cmd_index = cmd - SIOCIWFIRST;
                if(cmd_index < standard_ioctl_num)
                        descr = &(standard_ioctl[cmd_index]);
        } else {
                cmd_index = cmd - IWEVFIRST;
                if(cmd_index < standard_event_num)
                        descr = &(standard_event[cmd_index]);
        }
        /* Don't accept unknown events */
        if(descr == NULL) {
                /* Note : we don't return an error to the driver, because
                 * the driver would not know what to do about it. It can't
                 * return an error to the user, because the event is not
                 * initiated by a user request.
                 * The best the driver could do is to log an error message.
                 * We will do it ourselves instead...
                 */
                printk(KERN_ERR "%s (WE) : Invalid/Unknown Wireless Event (0x%04X)\n",
                       dev->name, cmd);
                return;
        }
#ifdef WE_EVENT_DEBUG
        printk(KERN_DEBUG "%s (WE) : Got event 0x%04X\n",
               dev->name, cmd);
        printk(KERN_DEBUG "%s (WE) : Header type : %d, Token type : %d, size : %d, token : %d\n", dev->name, descr->header_type, descr->token_type, descr->token_size, descr->max_tokens);
#endif  /* WE_EVENT_DEBUG */
 
        /* Check extra parameters and set extra_len */
        if(descr->header_type == IW_HEADER_TYPE_POINT) {
                /* Check if number of token fits within bounds */
                if(wrqu->data.length > descr->max_tokens) {
                        printk(KERN_ERR "%s (WE) : Wireless Event too big (%d)\n", dev->name, wrqu->data.length);
                        return;
                }
                if(wrqu->data.length < descr->min_tokens) {
                        printk(KERN_ERR "%s (WE) : Wireless Event too small (%d)\n", dev->name, wrqu->data.length);
                        return;
                }
                /* Calculate extra_len - extra is NULL for restricted events */
                if(extra != NULL)
                        extra_len = wrqu->data.length * descr->token_size;
#ifdef WE_EVENT_DEBUG
                printk(KERN_DEBUG "%s (WE) : Event 0x%04X, tokens %d, extra_len %d\n", dev->name, cmd, wrqu->data.length, extra_len);
#endif  /* WE_EVENT_DEBUG */
        }
 
        /* Total length of the event */
        hdr_len = event_type_size[descr->header_type];
        event_len = hdr_len + extra_len;
 
#ifdef WE_EVENT_DEBUG
        printk(KERN_DEBUG "%s (WE) : Event 0x%04X, hdr_len %d, event_len %d\n", dev->name, cmd, hdr_len, event_len);
#endif  /* WE_EVENT_DEBUG */
 
        /* Create temporary buffer to hold the event */
        event = kmalloc(event_len, GFP_ATOMIC);
        if(event == NULL)
                return;
 
        /* Fill event */
        event->len = event_len;
        event->cmd = cmd;
        memcpy(&event->u, wrqu, hdr_len - IW_EV_LCP_LEN);
        if(extra != NULL)
                memcpy(((char *) event) + hdr_len, extra, extra_len);
 
#ifdef WE_EVENT_NETLINK
        /* rtnetlink event channel */
        rtmsg_iwinfo(dev, (char *) event, event_len);
#endif  /* WE_EVENT_NETLINK */
 
        /* Cleanup */
        kfree(event);
 
        return;         /* Always success, I guess ;-) */
}
 
/********************** ENHANCED IWSPY SUPPORT **********************/
/*
 * In the old days, the driver was handling spy support all by itself.
 * Now, the driver can delegate this task to Wireless Extensions.
 * It needs to use those standard spy iw_handler in struct iw_handler_def,
 * push data to us via XXX and include struct iw_spy_data in its
 * private part.
 * One of the main advantage of centralising spy support here is that
 * it becomes much easier to improve and extend it without having to touch
 * the drivers. One example is the addition of the Spy-Threshold events.
 * Note : IW_WIRELESS_SPY is defined in iw_handler.h
 */
 
/*------------------------------------------------------------------*/
/*
 * Standard Wireless Handler : set Spy List
 */
int iw_handler_set_spy(struct net_device *      dev,
                       struct iw_request_info * info,
                       union iwreq_data *       wrqu,
                       char *                   extra)
{
#ifdef IW_WIRELESS_SPY
        struct iw_spy_data *    spydata = (dev->priv +
                                           dev->wireless_handlers->spy_offset);
        struct sockaddr *       address = (struct sockaddr *) extra;
 
        /* Disable spy collection while we copy the addresses.
         * As we don't disable interrupts, we need to do this to avoid races.
         * As we are the only writer, this is good enough. */
        spydata->spy_number = 0;
 
        /* Are there are addresses to copy? */
        if(wrqu->data.length > 0) {
                int i;
 
                /* Copy addresses */
                for(i = 0; i < wrqu->data.length; i++)
                        memcpy(spydata->spy_address[i], address[i].sa_data,
                               ETH_ALEN);
                /* Reset stats */
                memset(spydata->spy_stat, 0,
                       sizeof(struct iw_quality) * IW_MAX_SPY);
 
#ifdef WE_SPY_DEBUG
                printk(KERN_DEBUG "iw_handler_set_spy() :  offset %ld, spydata %p, num %d\n", dev->wireless_handlers->spy_offset, spydata, wrqu->data.length);
                for (i = 0; i < wrqu->data.length; i++)
                        printk(KERN_DEBUG
                               "%02X:%02X:%02X:%02X:%02X:%02X \n",
                               spydata->spy_address[i][0],
                               spydata->spy_address[i][1],
                               spydata->spy_address[i][2],
                               spydata->spy_address[i][3],
                               spydata->spy_address[i][4],
                               spydata->spy_address[i][5]);
#endif  /* WE_SPY_DEBUG */
        }
        /* Enable addresses */
        spydata->spy_number = wrqu->data.length;
 
        return 0;
#else /* IW_WIRELESS_SPY */
        return -EOPNOTSUPP;
#endif /* IW_WIRELESS_SPY */
}
 
/*------------------------------------------------------------------*/
/*
 * Standard Wireless Handler : get Spy List
 */
int iw_handler_get_spy(struct net_device *      dev,
                       struct iw_request_info * info,
                       union iwreq_data *       wrqu,
                       char *                   extra)
{
#ifdef IW_WIRELESS_SPY
        struct iw_spy_data *    spydata = (dev->priv +
                                           dev->wireless_handlers->spy_offset);
        struct sockaddr *       address = (struct sockaddr *) extra;
        int                     i;
 
        wrqu->data.length = spydata->spy_number;
 
        /* Copy addresses. */
        for(i = 0; i < spydata->spy_number; i++)         {
                memcpy(address[i].sa_data, spydata->spy_address[i], ETH_ALEN);
                address[i].sa_family = AF_UNIX;
        }
        /* Copy stats to the user buffer (just after). */
        if(spydata->spy_number > 0)
                memcpy(extra  + (sizeof(struct sockaddr) *spydata->spy_number),
                       spydata->spy_stat,
                       sizeof(struct iw_quality) * spydata->spy_number);
        /* Reset updated flags. */
        for(i = 0; i < spydata->spy_number; i++)
                spydata->spy_stat[i].updated = 0;
        return 0;
#else /* IW_WIRELESS_SPY */
        return -EOPNOTSUPP;
#endif /* IW_WIRELESS_SPY */
}
 
/*------------------------------------------------------------------*/
/*
 * Standard Wireless Handler : set spy threshold
 */
int iw_handler_set_thrspy(struct net_device *   dev,
                          struct iw_request_info *info,
                          union iwreq_data *    wrqu,
                          char *                extra)
{
#ifdef IW_WIRELESS_THRSPY
        struct iw_spy_data *    spydata = (dev->priv +
                                           dev->wireless_handlers->spy_offset);
        struct iw_thrspy *      threshold = (struct iw_thrspy *) extra;
 
        /* Just do it */
        memcpy(&(spydata->spy_thr_low), &(threshold->low),
               2 * sizeof(struct iw_quality));
 
        /* Clear flag */
        memset(spydata->spy_thr_under, '\0', sizeof(spydata->spy_thr_under));
 
#ifdef WE_SPY_DEBUG
        printk(KERN_DEBUG "iw_handler_set_thrspy() :  low %d ; high %d\n", spydata->spy_thr_low.level, spydata->spy_thr_high.level);
#endif  /* WE_SPY_DEBUG */
 
        return 0;
#else /* IW_WIRELESS_THRSPY */
        return -EOPNOTSUPP;
#endif /* IW_WIRELESS_THRSPY */
}
 
/*------------------------------------------------------------------*/
/*
 * Standard Wireless Handler : get spy threshold
 */
int iw_handler_get_thrspy(struct net_device *   dev,
                          struct iw_request_info *info,
                          union iwreq_data *    wrqu,
                          char *                extra)
{
#ifdef IW_WIRELESS_THRSPY
        struct iw_spy_data *    spydata = (dev->priv +
                                           dev->wireless_handlers->spy_offset);
        struct iw_thrspy *      threshold = (struct iw_thrspy *) extra;
 
        /* Just do it */
        memcpy(&(threshold->low), &(spydata->spy_thr_low),
               2 * sizeof(struct iw_quality));
 
        return 0;
#else /* IW_WIRELESS_THRSPY */
        return -EOPNOTSUPP;
#endif /* IW_WIRELESS_THRSPY */
}
 
#ifdef IW_WIRELESS_THRSPY
/*------------------------------------------------------------------*/
/*
 * Prepare and send a Spy Threshold event
 */
static void iw_send_thrspy_event(struct net_device *    dev,
                                 struct iw_spy_data *   spydata,
                                 unsigned char *        address,
                                 struct iw_quality *    wstats)
{
        union iwreq_data        wrqu;
        struct iw_thrspy        threshold;
 
        /* Init */
        wrqu.data.length = 1;
        wrqu.data.flags = 0;
        /* Copy address */
        memcpy(threshold.addr.sa_data, address, ETH_ALEN);
        threshold.addr.sa_family = ARPHRD_ETHER;
        /* Copy stats */
        memcpy(&(threshold.qual), wstats, sizeof(struct iw_quality));
        /* Copy also thresholds */
        memcpy(&(threshold.low), &(spydata->spy_thr_low),
               2 * sizeof(struct iw_quality));
 
#ifdef WE_SPY_DEBUG
        printk(KERN_DEBUG "iw_send_thrspy_event() : address %02X:%02X:%02X:%02X:%02X:%02X, level %d, up = %d\n",
               threshold.addr.sa_data[0],
               threshold.addr.sa_data[1],
               threshold.addr.sa_data[2],
               threshold.addr.sa_data[3],
               threshold.addr.sa_data[4],
               threshold.addr.sa_data[5], threshold.qual.level);
#endif  /* WE_SPY_DEBUG */
 
        /* Send event to user space */
        wireless_send_event(dev, SIOCGIWTHRSPY, &wrqu, (char *) &threshold);
}
#endif /* IW_WIRELESS_THRSPY */
 
/* ---------------------------------------------------------------- */
/*
 * Call for the driver to update the spy data.
 * For now, the spy data is a simple array. As the size of the array is
 * small, this is good enough. If we wanted to support larger number of
 * spy addresses, we should use something more efficient...
 */
void wireless_spy_update(struct net_device *    dev,
                         unsigned char *        address,
                         struct iw_quality *    wstats)
{
#ifdef IW_WIRELESS_SPY
        struct iw_spy_data *    spydata = (dev->priv +
                                           dev->wireless_handlers->spy_offset);
        int                     i;
        int                     match = -1;
 
#ifdef WE_SPY_DEBUG
        printk(KERN_DEBUG "wireless_spy_update() :  offset %ld, spydata %p, address %02X:%02X:%02X:%02X:%02X:%02X\n", dev->wireless_handlers->spy_offset, spydata, address[0], address[1], address[2], address[3], address[4], address[5]);
#endif  /* WE_SPY_DEBUG */
 
        /* Update all records that match */
        for(i = 0; i < spydata->spy_number; i++)
                if(!memcmp(address, spydata->spy_address[i], ETH_ALEN)) {
                        memcpy(&(spydata->spy_stat[i]), wstats,
                               sizeof(struct iw_quality));
                        match = i;
                }
#ifdef IW_WIRELESS_THRSPY
        /* Generate an event if we cross the spy threshold.
         * To avoid event storms, we have a simple hysteresis : we generate
         * event only when we go under the low threshold or above the
         * high threshold. */
        if(match >= 0) {
                if(spydata->spy_thr_under[match]) {
                        if(wstats->level > spydata->spy_thr_high.level) {
                                spydata->spy_thr_under[match] = 0;
                                iw_send_thrspy_event(dev, spydata,
                                                     address, wstats);
                        }
                } else {
                        if(wstats->level < spydata->spy_thr_low.level) {
                                spydata->spy_thr_under[match] = 1;
                                iw_send_thrspy_event(dev, spydata,
                                                     address, wstats);
                        }
                }
        }
#endif /* IW_WIRELESS_THRSPY */
#endif /* IW_WIRELESS_SPY */
}
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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [net/] [core/] [wireless.c] - Blame information for rev 1775

Line No.	Rev	Author	Line
1	1278	phoenix	`/*`
2			`* This file implement the Wireless Extensions APIs.`
3			`*`
4			`* Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com>`
5			`* Copyright (c) 1997-2003 Jean Tourrilhes, All Rights Reserved.`
6			`*`
7			`* (As all part of the Linux kernel, this file is GPL)`
8			`*/`
9
10			`/************************ DOCUMENTATION ************************/`
11			`/*`
12			`* API definition :`
13			`* --------------`
14			`* See <linux/wireless.h> for details of the APIs and the rest.`
15			`*`
16			`* History :`
17			`* -------`
18			`*`
19			`* v1 - 5.12.01 - Jean II`
20			`* o Created this file.`
21			`*`
22			`* v2 - 13.12.01 - Jean II`
23			`* o Move /proc/net/wireless stuff from net/core/dev.c to here`
24			`* o Make Wireless Extension IOCTLs go through here`
25			`* o Added iw_handler handling ;-)`
26			`* o Added standard ioctl description`
27			`* o Initial dumb commit strategy based on orinoco.c`
28			`*`
29			`* v3 - 19.12.01 - Jean II`
30			`* o Make sure we don't go out of standard_ioctl[] in ioctl_standard_call`
31			`* o Add event dispatcher function`
32			`* o Add event description`
33			`* o Propagate events as rtnetlink IFLA_WIRELESS option`
34			`* o Generate event on selected SET requests`
35			`*`
36			`* v4 - 18.04.02 - Jean II`
37			`* o Fix stupid off by one in iw_ioctl_description : IW_ESSID_MAX_SIZE + 1`
38			`*`
39			`* v5 - 21.06.02 - Jean II`
40			`* o Add IW_PRIV_TYPE_ADDR in priv_type_size (+cleanup)`