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1bd552fab3
openwrt-xburst/target/linux/generic-2.4/patches/100-wireless-extension.patch
wbx 2315b47b10 wireless extension 18 for 2.4 kernels, needed for xsupplicant 
git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@3367 3c298f89-4303-0410-b956-a3cf2f4a3e73
2006-03-14 21:11:36 +00:00

1122 lines
40 KiB
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diff -Nur linux-2.4.32/include/linux/netdevice.h linux-2.4.32-we/include/linux/netdevice.h
--- linux-2.4.32/include/linux/netdevice.h 2004-11-17 12:54:22.000000000 +0100
+++ linux-2.4.32-we/include/linux/netdevice.h 2006-03-13 12:10:57.000000000 +0100
@@ -295,7 +295,9 @@
/* List of functions to handle Wireless Extensions (instead of ioctl).
* See <net/iw_handler.h> for details. Jean II */
- struct iw_handler_def * wireless_handlers;
+ const struct iw_handler_def * wireless_handlers;
+ /* Instance data managed by the core of Wireless Extensions. */
+ struct iw_public_data * wireless_data;
struct ethtool_ops *ethtool_ops;
diff -Nur linux-2.4.32/include/linux/wireless.h linux-2.4.32-we/include/linux/wireless.h
--- linux-2.4.32/include/linux/wireless.h 2003-11-28 19:26:21.000000000 +0100
+++ linux-2.4.32-we/include/linux/wireless.h 2006-03-13 12:11:02.000000000 +0100
@@ -1,10 +1,10 @@
/*
* This file define a set of standard wireless extensions
*
- * Version : 16 2.4.03
+ * Version : 18 12.3.05
*
* Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com>
- * Copyright (c) 1997-2002 Jean Tourrilhes, All Rights Reserved.
+ * Copyright (c) 1997-2005 Jean Tourrilhes, All Rights Reserved.
*/
#ifndef _LINUX_WIRELESS_H
@@ -47,12 +47,12 @@
* # include/net/iw_handler.h
*
* Note as well that /proc/net/wireless implementation has now moved in :
- * # include/linux/wireless.c
+ * # net/core/wireless.c
*
* Wireless Events (2002 -> onward) :
* --------------------------------
* Events are defined at the end of this file, and implemented in :
- * # include/linux/wireless.c
+ * # net/core/wireless.c
*
* Other comments :
* --------------
@@ -82,7 +82,7 @@
* (there is some stuff that will be added in the future...)
* I just plan to increment with each new version.
*/
-#define WIRELESS_EXT 16
+#define WIRELESS_EXT 18
/*
* Changes :
@@ -175,6 +175,28 @@
* - Remove IW_MAX_GET_SPY because conflict with enhanced spy support
* - Add SIOCSIWTHRSPY/SIOCGIWTHRSPY and "struct iw_thrspy"
* - Add IW_ENCODE_TEMP and iw_range->encoding_login_index
+ *
+ * V16 to V17
+ * ----------
+ * - Add flags to frequency -> auto/fixed
+ * - Document (struct iw_quality *)->updated, add new flags (INVALID)
+ * - Wireless Event capability in struct iw_range
+ * - Add support for relative TxPower (yick !)
+ *
+ * V17 to V18 (From Jouni Malinen <jkmaline@cc.hut.fi>)
+ * ----------
+ * - Add support for WPA/WPA2
+ * - Add extended encoding configuration (SIOCSIWENCODEEXT and
+ * SIOCGIWENCODEEXT)
+ * - Add SIOCSIWGENIE/SIOCGIWGENIE
+ * - Add SIOCSIWMLME
+ * - Add SIOCSIWPMKSA
+ * - Add struct iw_range bit field for supported encoding capabilities
+ * - Add optional scan request parameters for SIOCSIWSCAN
+ * - Add SIOCSIWAUTH/SIOCGIWAUTH for setting authentication and WPA
+ * related parameters (extensible up to 4096 parameter values)
+ * - Add wireless events: IWEVGENIE, IWEVMICHAELMICFAILURE,
+ * IWEVASSOCREQIE, IWEVASSOCRESPIE, IWEVPMKIDCAND
*/
/**************************** CONSTANTS ****************************/
@@ -249,9 +271,33 @@
#define SIOCSIWPOWER 0x8B2C /* set Power Management settings */
#define SIOCGIWPOWER 0x8B2D /* get Power Management settings */
+/* WPA : Generic IEEE 802.11 informatiom element (e.g., for WPA/RSN/WMM).
+ * This ioctl uses struct iw_point and data buffer that includes IE id and len
+ * fields. More than one IE may be included in the request. Setting the generic
+ * IE to empty buffer (len=0) removes the generic IE from the driver. Drivers
+ * are allowed to generate their own WPA/RSN IEs, but in these cases, drivers
+ * are required to report the used IE as a wireless event, e.g., when
+ * associating with an AP. */
+#define SIOCSIWGENIE 0x8B30 /* set generic IE */
+#define SIOCGIWGENIE 0x8B31 /* get generic IE */
+
+/* WPA : IEEE 802.11 MLME requests */
+#define SIOCSIWMLME 0x8B16 /* request MLME operation; uses
+ * struct iw_mlme */
+/* WPA : Authentication mode parameters */
+#define SIOCSIWAUTH 0x8B32 /* set authentication mode params */
+#define SIOCGIWAUTH 0x8B33 /* get authentication mode params */
+
+/* WPA : Extended version of encoding configuration */
+#define SIOCSIWENCODEEXT 0x8B34 /* set encoding token & mode */
+#define SIOCGIWENCODEEXT 0x8B35 /* get encoding token & mode */
+
+/* WPA2 : PMKSA cache management */
+#define SIOCSIWPMKSA 0x8B36 /* PMKSA cache operation */
+
/* -------------------- DEV PRIVATE IOCTL LIST -------------------- */
-/* These 16 ioctl are wireless device private.
+/* These 32 ioctl are wireless device private, for 16 commands.
* Each driver is free to use them for whatever purpose it chooses,
* however the driver *must* export the description of those ioctls
* with SIOCGIWPRIV and *must* use arguments as defined below.
@@ -266,8 +312,8 @@
* We now have 32 commands, so a bit more space ;-).
* Also, all 'odd' commands are only usable by root and don't return the
* content of ifr/iwr to user (but you are not obliged to use the set/get
- * convention, just use every other two command).
- * And I repeat : you are not obliged to use them with iwspy, but you
+ * convention, just use every other two command). More details in iwpriv.c.
+ * And I repeat : you are not forced to use them with iwpriv, but you
* must be compliant with it.
*/
@@ -290,6 +336,34 @@
#define IWEVCUSTOM 0x8C02 /* Driver specific ascii string */
#define IWEVREGISTERED 0x8C03 /* Discovered a new node (AP mode) */
#define IWEVEXPIRED 0x8C04 /* Expired a node (AP mode) */
+#define IWEVGENIE 0x8C05 /* Generic IE (WPA, RSN, WMM, ..)
+ * (scan results); This includes id and
+ * length fields. One IWEVGENIE may
+ * contain more than one IE. Scan
+ * results may contain one or more
+ * IWEVGENIE events. */
+#define IWEVMICHAELMICFAILURE 0x8C06 /* Michael MIC failure
+ * (struct iw_michaelmicfailure)
+ */
+#define IWEVASSOCREQIE 0x8C07 /* IEs used in (Re)Association Request.
+ * The data includes id and length
+ * fields and may contain more than one
+ * IE. This event is required in
+ * Managed mode if the driver
+ * generates its own WPA/RSN IE. This
+ * should be sent just before
+ * IWEVREGISTERED event for the
+ * association. */
+#define IWEVASSOCRESPIE 0x8C08 /* IEs used in (Re)Association
+ * Response. The data includes id and
+ * length fields and may contain more
+ * than one IE. This may be sent
+ * between IWEVASSOCREQIE and
+ * IWEVREGISTERED events for the
+ * association. */
+#define IWEVPMKIDCAND 0x8C09 /* PMKID candidate for RSN
+ * pre-authentication
+ * (struct iw_pmkid_cand) */
#define IWEVFIRST 0x8C00
@@ -352,6 +426,18 @@
#define IW_MODE_SECOND 5 /* Secondary master/repeater (backup) */
#define IW_MODE_MONITOR 6 /* Passive monitor (listen only) */
+/* Statistics flags (bitmask in updated) */
+#define IW_QUAL_QUAL_UPDATED 0x1 /* Value was updated since last read */
+#define IW_QUAL_LEVEL_UPDATED 0x2
+#define IW_QUAL_NOISE_UPDATED 0x4
+#define IW_QUAL_QUAL_INVALID 0x10 /* Driver doesn't provide value */
+#define IW_QUAL_LEVEL_INVALID 0x20
+#define IW_QUAL_NOISE_INVALID 0x40
+
+/* Frequency flags */
+#define IW_FREQ_AUTO 0x00 /* Let the driver decides */
+#define IW_FREQ_FIXED 0x01 /* Force a specific value */
+
/* Maximum number of size of encoding token available
* they are listed in the range structure */
#define IW_MAX_ENCODING_SIZES 8
@@ -390,6 +476,7 @@
#define IW_TXPOW_TYPE 0x00FF /* Type of value */
#define IW_TXPOW_DBM 0x0000 /* Value is in dBm */
#define IW_TXPOW_MWATT 0x0001 /* Value is in mW */
+#define IW_TXPOW_RELATIVE 0x0002 /* Value is in arbitrary units */
#define IW_TXPOW_RANGE 0x1000 /* Range of value between min/max */
/* Retry limits and lifetime flags available */
@@ -412,12 +499,113 @@
#define IW_SCAN_THIS_MODE 0x0020 /* Scan only this Mode */
#define IW_SCAN_ALL_RATE 0x0040 /* Scan all Bit-Rates */
#define IW_SCAN_THIS_RATE 0x0080 /* Scan only this Bit-Rate */
+/* struct iw_scan_req scan_type */
+#define IW_SCAN_TYPE_ACTIVE 0
+#define IW_SCAN_TYPE_PASSIVE 1
/* Maximum size of returned data */
#define IW_SCAN_MAX_DATA 4096 /* In bytes */
/* Max number of char in custom event - use multiple of them if needed */
#define IW_CUSTOM_MAX 256 /* In bytes */
+/* Generic information element */
+#define IW_GENERIC_IE_MAX 1024
+
+/* MLME requests (SIOCSIWMLME / struct iw_mlme) */
+#define IW_MLME_DEAUTH 0
+#define IW_MLME_DISASSOC 1
+
+/* SIOCSIWAUTH/SIOCGIWAUTH struct iw_param flags */
+#define IW_AUTH_INDEX 0x0FFF
+#define IW_AUTH_FLAGS 0xF000
+/* SIOCSIWAUTH/SIOCGIWAUTH parameters (0 .. 4095)
+ * (IW_AUTH_INDEX mask in struct iw_param flags; this is the index of the
+ * parameter that is being set/get to; value will be read/written to
+ * struct iw_param value field) */
+#define IW_AUTH_WPA_VERSION 0
+#define IW_AUTH_CIPHER_PAIRWISE 1
+#define IW_AUTH_CIPHER_GROUP 2
+#define IW_AUTH_KEY_MGMT 3
+#define IW_AUTH_TKIP_COUNTERMEASURES 4
+#define IW_AUTH_DROP_UNENCRYPTED 5
+#define IW_AUTH_80211_AUTH_ALG 6
+#define IW_AUTH_WPA_ENABLED 7
+#define IW_AUTH_RX_UNENCRYPTED_EAPOL 8
+#define IW_AUTH_ROAMING_CONTROL 9
+#define IW_AUTH_PRIVACY_INVOKED 10
+
+/* IW_AUTH_WPA_VERSION values (bit field) */
+#define IW_AUTH_WPA_VERSION_DISABLED 0x00000001
+#define IW_AUTH_WPA_VERSION_WPA 0x00000002
+#define IW_AUTH_WPA_VERSION_WPA2 0x00000004
+
+/* IW_AUTH_PAIRWISE_CIPHER and IW_AUTH_GROUP_CIPHER values (bit field) */
+#define IW_AUTH_CIPHER_NONE 0x00000001
+#define IW_AUTH_CIPHER_WEP40 0x00000002
+#define IW_AUTH_CIPHER_TKIP 0x00000004
+#define IW_AUTH_CIPHER_CCMP 0x00000008
+#define IW_AUTH_CIPHER_WEP104 0x00000010
+
+/* IW_AUTH_KEY_MGMT values (bit field) */
+#define IW_AUTH_KEY_MGMT_802_1X 1
+#define IW_AUTH_KEY_MGMT_PSK 2
+
+/* IW_AUTH_80211_AUTH_ALG values (bit field) */
+#define IW_AUTH_ALG_OPEN_SYSTEM 0x00000001
+#define IW_AUTH_ALG_SHARED_KEY 0x00000002
+#define IW_AUTH_ALG_LEAP 0x00000004
+
+/* IW_AUTH_ROAMING_CONTROL values */
+#define IW_AUTH_ROAMING_ENABLE 0 /* driver/firmware based roaming */
+#define IW_AUTH_ROAMING_DISABLE 1 /* user space program used for roaming
+ * control */
+
+/* SIOCSIWENCODEEXT definitions */
+#define IW_ENCODE_SEQ_MAX_SIZE 8
+/* struct iw_encode_ext ->alg */
+#define IW_ENCODE_ALG_NONE 0
+#define IW_ENCODE_ALG_WEP 1
+#define IW_ENCODE_ALG_TKIP 2
+#define IW_ENCODE_ALG_CCMP 3
+/* struct iw_encode_ext ->ext_flags */
+#define IW_ENCODE_EXT_TX_SEQ_VALID 0x00000001
+#define IW_ENCODE_EXT_RX_SEQ_VALID 0x00000002
+#define IW_ENCODE_EXT_GROUP_KEY 0x00000004
+#define IW_ENCODE_EXT_SET_TX_KEY 0x00000008
+
+/* IWEVMICHAELMICFAILURE : struct iw_michaelmicfailure ->flags */
+#define IW_MICFAILURE_KEY_ID 0x00000003 /* Key ID 0..3 */
+#define IW_MICFAILURE_GROUP 0x00000004
+#define IW_MICFAILURE_PAIRWISE 0x00000008
+#define IW_MICFAILURE_STAKEY 0x00000010
+#define IW_MICFAILURE_COUNT 0x00000060 /* 1 or 2 (0 = count not supported)
+ */
+
+/* Bit field values for enc_capa in struct iw_range */
+#define IW_ENC_CAPA_WPA 0x00000001
+#define IW_ENC_CAPA_WPA2 0x00000002
+#define IW_ENC_CAPA_CIPHER_TKIP 0x00000004
+#define IW_ENC_CAPA_CIPHER_CCMP 0x00000008
+
+/* Event capability macros - in (struct iw_range *)->event_capa
+ * Because we have more than 32 possible events, we use an array of
+ * 32 bit bitmasks. Note : 32 bits = 0x20 = 2^5. */
+#define IW_EVENT_CAPA_BASE(cmd) ((cmd >= SIOCIWFIRSTPRIV) ? \
+ (cmd - SIOCIWFIRSTPRIV + 0x60) : \
+ (cmd - SIOCSIWCOMMIT))
+#define IW_EVENT_CAPA_INDEX(cmd) (IW_EVENT_CAPA_BASE(cmd) >> 5)
+#define IW_EVENT_CAPA_MASK(cmd) (1 << (IW_EVENT_CAPA_BASE(cmd) & 0x1F))
+/* Event capability constants - event autogenerated by the kernel
+ * This list is valid for most 802.11 devices, customise as needed... */
+#define IW_EVENT_CAPA_K_0 (IW_EVENT_CAPA_MASK(0x8B04) | \
+ IW_EVENT_CAPA_MASK(0x8B06) | \
+ IW_EVENT_CAPA_MASK(0x8B1A))
+#define IW_EVENT_CAPA_K_1 (IW_EVENT_CAPA_MASK(0x8B2A))
+/* "Easy" macro to set events in iw_range (less efficient) */
+#define IW_EVENT_CAPA_SET(event_capa, cmd) (event_capa[IW_EVENT_CAPA_INDEX(cmd)] |= IW_EVENT_CAPA_MASK(cmd))
+#define IW_EVENT_CAPA_SET_KERNEL(event_capa) {event_capa[0] |= IW_EVENT_CAPA_K_0; event_capa[1] |= IW_EVENT_CAPA_K_1; }
+
+
/****************************** TYPES ******************************/
/* --------------------------- SUBTYPES --------------------------- */
@@ -456,7 +644,7 @@
__s32 m; /* Mantissa */
__s16 e; /* Exponent */
__u8 i; /* List index (when in range struct) */
- __u8 pad; /* Unused - just for alignement */
+ __u8 flags; /* Flags (fixed/auto) */
};
/*
@@ -507,6 +695,132 @@
struct iw_quality high; /* High threshold */
};
+/*
+ * Optional data for scan request
+ *
+ * Note: these optional parameters are controlling parameters for the
+ * scanning behavior, these do not apply to getting scan results
+ * (SIOCGIWSCAN). Drivers are expected to keep a local BSS table and
+ * provide a merged results with all BSSes even if the previous scan
+ * request limited scanning to a subset, e.g., by specifying an SSID.
+ * Especially, scan results are required to include an entry for the
+ * current BSS if the driver is in Managed mode and associated with an AP.
+ */
+struct iw_scan_req
+{
+ __u8 scan_type; /* IW_SCAN_TYPE_{ACTIVE,PASSIVE} */
+ __u8 essid_len;
+ __u8 num_channels; /* num entries in channel_list;
+ * 0 = scan all allowed channels */
+ __u8 flags; /* reserved as padding; use zero, this may
+ * be used in the future for adding flags
+ * to request different scan behavior */
+ struct sockaddr bssid; /* ff:ff:ff:ff:ff:ff for broadcast BSSID or
+ * individual address of a specific BSS */
+
+ /*
+ * Use this ESSID if IW_SCAN_THIS_ESSID flag is used instead of using
+ * the current ESSID. This allows scan requests for specific ESSID
+ * without having to change the current ESSID and potentially breaking
+ * the current association.
+ */
+ __u8 essid[IW_ESSID_MAX_SIZE];
+
+ /*
+ * Optional parameters for changing the default scanning behavior.
+ * These are based on the MLME-SCAN.request from IEEE Std 802.11.
+ * TU is 1.024 ms. If these are set to 0, driver is expected to use
+ * reasonable default values. min_channel_time defines the time that
+ * will be used to wait for the first reply on each channel. If no
+ * replies are received, next channel will be scanned after this. If
+ * replies are received, total time waited on the channel is defined by
+ * max_channel_time.
+ */
+ __u32 min_channel_time; /* in TU */
+ __u32 max_channel_time; /* in TU */
+
+ struct iw_freq channel_list[IW_MAX_FREQUENCIES];
+};
+
+/* ------------------------- WPA SUPPORT ------------------------- */
+
+/*
+ * Extended data structure for get/set encoding (this is used with
+ * SIOCSIWENCODEEXT/SIOCGIWENCODEEXT. struct iw_point and IW_ENCODE_*
+ * flags are used in the same way as with SIOCSIWENCODE/SIOCGIWENCODE and
+ * only the data contents changes (key data -> this structure, including
+ * key data).
+ *
+ * If the new key is the first group key, it will be set as the default
+ * TX key. Otherwise, default TX key index is only changed if
+ * IW_ENCODE_EXT_SET_TX_KEY flag is set.
+ *
+ * Key will be changed with SIOCSIWENCODEEXT in all cases except for
+ * special "change TX key index" operation which is indicated by setting
+ * key_len = 0 and ext_flags |= IW_ENCODE_EXT_SET_TX_KEY.
+ *
+ * tx_seq/rx_seq are only used when respective
+ * IW_ENCODE_EXT_{TX,RX}_SEQ_VALID flag is set in ext_flags. Normal
+ * TKIP/CCMP operation is to set RX seq with SIOCSIWENCODEEXT and start
+ * TX seq from zero whenever key is changed. SIOCGIWENCODEEXT is normally
+ * used only by an Authenticator (AP or an IBSS station) to get the
+ * current TX sequence number. Using TX_SEQ_VALID for SIOCSIWENCODEEXT and
+ * RX_SEQ_VALID for SIOCGIWENCODEEXT are optional, but can be useful for
+ * debugging/testing.
+ */
+struct iw_encode_ext
+{
+ __u32 ext_flags; /* IW_ENCODE_EXT_* */
+ __u8 tx_seq[IW_ENCODE_SEQ_MAX_SIZE]; /* LSB first */
+ __u8 rx_seq[IW_ENCODE_SEQ_MAX_SIZE]; /* LSB first */
+ struct sockaddr addr; /* ff:ff:ff:ff:ff:ff for broadcast/multicast
+ * (group) keys or unicast address for
+ * individual keys */
+ __u16 alg; /* IW_ENCODE_ALG_* */
+ __u16 key_len;
+ __u8 key[0];
+};
+
+/* SIOCSIWMLME data */
+struct iw_mlme
+{
+ __u16 cmd; /* IW_MLME_* */
+ __u16 reason_code;
+ struct sockaddr addr;
+};
+
+/* SIOCSIWPMKSA data */
+#define IW_PMKSA_ADD 1
+#define IW_PMKSA_REMOVE 2
+#define IW_PMKSA_FLUSH 3
+
+#define IW_PMKID_LEN 16
+
+struct iw_pmksa
+{
+ __u32 cmd; /* IW_PMKSA_* */
+ struct sockaddr bssid;
+ __u8 pmkid[IW_PMKID_LEN];
+};
+
+/* IWEVMICHAELMICFAILURE data */
+struct iw_michaelmicfailure
+{
+ __u32 flags;
+ struct sockaddr src_addr;
+ __u8 tsc[IW_ENCODE_SEQ_MAX_SIZE]; /* LSB first */
+};
+
+/* IWEVPMKIDCAND data */
+#define IW_PMKID_CAND_PREAUTH 0x00000001 /* RNS pre-authentication enabled */
+struct iw_pmkid_cand
+{
+ __u32 flags; /* IW_PMKID_CAND_* */
+ __u32 index; /* the smaller the index, the higher the
+ * priority */
+ struct sockaddr bssid;
+};
+
/* ------------------------ WIRELESS STATS ------------------------ */
/*
* Wireless statistics (used for /proc/net/wireless)
@@ -610,11 +924,12 @@
/* Old Frequency (backward compat - moved lower ) */
__u16 old_num_channels;
__u8 old_num_frequency;
- /* Filler to keep "version" at the same offset */
- __s32 old_freq[6];
+
+ /* Wireless event capability bitmasks */
+ __u32 event_capa[6];
/* signal level threshold range */
- __s32 sensitivity;
+ __s32 sensitivity;
/* Quality of link & SNR stuff */
/* Quality range (link, level, noise)
@@ -685,6 +1000,8 @@
struct iw_freq freq[IW_MAX_FREQUENCIES]; /* list */
/* Note : this frequency list doesn't need to fit channel numbers,
* because each entry contain its channel index */
+
+ __u32 enc_capa; /* IW_ENC_CAPA_* bit field */
};
/*
diff -Nur linux-2.4.32/include/net/iw_handler.h linux-2.4.32-we/include/net/iw_handler.h
--- linux-2.4.32/include/net/iw_handler.h 2003-11-28 19:26:21.000000000 +0100
+++ linux-2.4.32-we/include/net/iw_handler.h 2006-03-13 12:10:57.000000000 +0100
@@ -1,10 +1,10 @@
/*
* This file define the new driver API for Wireless Extensions
*
- * Version : 5 4.12.02
+ * Version : 6 21.6.04
*
* Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com>
- * Copyright (c) 2001-2002 Jean Tourrilhes, All Rights Reserved.
+ * Copyright (c) 2001-2004 Jean Tourrilhes, All Rights Reserved.
*/
#ifndef _IW_HANDLER_H
@@ -206,7 +206,7 @@
* will be needed...
* I just plan to increment with each new version.
*/
-#define IW_HANDLER_VERSION 5
+#define IW_HANDLER_VERSION 6
/*
* Changes :
@@ -224,11 +224,18 @@
* V4 to V5
* --------
* - Add new spy support : struct iw_spy_data & prototypes
+ *
+ * V5 to V6
+ * --------
+ * - Change the way we get to spy_data method for added safety
+ * - Remove spy #ifdef, they are always on -> cleaner code
+ * - Add IW_DESCR_FLAG_NOMAX flag for very large requests
+ * - Start migrating get_wireless_stats to struct iw_handler_def
*/
/**************************** CONSTANTS ****************************/
-/* Enable enhanced spy support. Disable to reduce footprint */
+/* Enhanced spy support available */
#define IW_WIRELESS_SPY
#define IW_WIRELESS_THRSPY
@@ -258,6 +265,7 @@
#define IW_DESCR_FLAG_EVENT 0x0002 /* Generate an event on SET */
#define IW_DESCR_FLAG_RESTRICT 0x0004 /* GET : request is ROOT only */
/* SET : Omit payload from generated iwevent */
+#define IW_DESCR_FLAG_NOMAX 0x0008 /* GET : no limit on request size */
/* Driver level flags */
#define IW_DESCR_FLAG_WAIT 0x0100 /* Wait for driver event */
@@ -311,23 +319,25 @@
/* Array of handlers for standard ioctls
* We will call dev->wireless_handlers->standard[ioctl - SIOCSIWNAME]
*/
- iw_handler * standard;
+ const iw_handler * standard;
/* Array of handlers for private ioctls
* Will call dev->wireless_handlers->private[ioctl - SIOCIWFIRSTPRIV]
*/
- iw_handler * private;
+ const iw_handler * private;
/* Arguments of private handler. This one is just a list, so you
* can put it in any order you want and should not leave holes...
* We will automatically export that to user space... */
- struct iw_priv_args * private_args;
+ const struct iw_priv_args * private_args;
- /* Driver enhanced spy support */
- long spy_offset; /* Spy data offset */
+ /* This field will be *removed* in the next version of WE */
+ long spy_offset; /* DO NOT USE */
- /* In the long term, get_wireless_stats will move from
- * 'struct net_device' to here, to minimise bloat. */
+ /* New location of get_wireless_stats, to de-bloat struct net_device.
+ * The old pointer in struct net_device will be gradually phased
+ * out, and drivers are encouraged to use this one... */
+ struct iw_statistics* (*get_wireless_stats)(struct net_device *dev);
};
/* ---------------------- IOCTL DESCRIPTION ---------------------- */
@@ -374,18 +384,29 @@
*/
struct iw_spy_data
{
-#ifdef IW_WIRELESS_SPY
/* --- Standard spy support --- */
int spy_number;
u_char spy_address[IW_MAX_SPY][ETH_ALEN];
struct iw_quality spy_stat[IW_MAX_SPY];
-#ifdef IW_WIRELESS_THRSPY
/* --- Enhanced spy support (event) */
struct iw_quality spy_thr_low; /* Low threshold */
struct iw_quality spy_thr_high; /* High threshold */
u_char spy_thr_under[IW_MAX_SPY];
-#endif /* IW_WIRELESS_THRSPY */
-#endif /* IW_WIRELESS_SPY */
+};
+
+/* --------------------- DEVICE WIRELESS DATA --------------------- */
+/*
+ * This is all the wireless data specific to a device instance that
+ * is managed by the core of Wireless Extensions.
+ * We only keep pointer to those structures, so that a driver is free
+ * to share them between instances.
+ * This structure should be initialised before registering the device.
+ * Access to this data follow the same rules as any other struct net_device
+ * data (i.e. valid as long as struct net_device exist, same locking rules).
+ */
+struct iw_public_data {
+ /* Driver enhanced spy support */
+ struct iw_spy_data * spy_data;
};
/**************************** PROTOTYPES ****************************/
diff -Nur linux-2.4.32/net/core/dev.c linux-2.4.32-we/net/core/dev.c
--- linux-2.4.32/net/core/dev.c 2005-04-04 03:42:20.000000000 +0200
+++ linux-2.4.32-we/net/core/dev.c 2006-03-13 12:10:57.000000000 +0100
@@ -2426,7 +2426,7 @@
/* Follow me in net/core/wireless.c */
ret = wireless_process_ioctl(&ifr, cmd);
rtnl_unlock();
- if (!ret && IW_IS_GET(cmd) &&
+ if (IW_IS_GET(cmd) &&
copy_to_user(arg, &ifr, sizeof(struct ifreq)))
return -EFAULT;
return ret;
diff -Nur linux-2.4.32/net/core/wireless.c linux-2.4.32-we/net/core/wireless.c
--- linux-2.4.32/net/core/wireless.c 2003-11-28 19:26:21.000000000 +0100
+++ linux-2.4.32-we/net/core/wireless.c 2006-03-13 12:11:02.000000000 +0100
@@ -2,7 +2,7 @@
* This file implement the Wireless Extensions APIs.
*
* Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com>
- * Copyright (c) 1997-2003 Jean Tourrilhes, All Rights Reserved.
+ * Copyright (c) 1997-2005 Jean Tourrilhes, All Rights Reserved.
*
* (As all part of the Linux kernel, this file is GPL)
*/
@@ -48,6 +48,16 @@
* 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
+ *
+ * v6 - 18.06.04 - Jean II
+ * o Change get_spydata() method for added safety
+ * o Remove spy #ifdef, they are always on -> cleaner code
+ * o Allow any size GET request if user specifies length > max
+ * and if request has IW_DESCR_FLAG_NOMAX flag or is SIOCGIWPRIV
+ * o Start migrating get_wireless_stats to struct iw_handler_def
+ * o Add wmb() in iw_handler_set_spy() for non-coherent archs/cpus
+ * Based on patch from Pavel Roskin <proski@gnu.org> :
+ * o Fix kernel data leak to user space in private handler handling
*/
/***************************** INCLUDES *****************************/
@@ -64,11 +74,7 @@
/**************************** 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 */
+/* Debugging stuff */
#undef WE_IOCTL_DEBUG /* Debug IOCTL API */
#undef WE_EVENT_DEBUG /* Debug Event dispatcher */
#undef WE_SPY_DEBUG /* Debug enhanced spy support */
@@ -131,14 +137,14 @@
{ 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},
+ /* SIOCSIWMLME */
+ { IW_HEADER_TYPE_POINT, 0, 1, sizeof(struct iw_mlme), sizeof(struct iw_mlme), 0},
/* SIOCGIWAPLIST */
- { IW_HEADER_TYPE_POINT, 0, (sizeof(struct sockaddr) + sizeof(struct iw_quality)), 0, IW_MAX_AP, 0},
+ { IW_HEADER_TYPE_POINT, 0, (sizeof(struct sockaddr) + sizeof(struct iw_quality)), 0, IW_MAX_AP, IW_DESCR_FLAG_NOMAX},
/* SIOCSIWSCAN */
- { IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
+ { IW_HEADER_TYPE_POINT, 0, 1, 0, sizeof(struct iw_scan_req), 0},
/* SIOCGIWSCAN */
- { IW_HEADER_TYPE_POINT, 0, 1, 0, IW_SCAN_MAX_DATA, 0},
+ { IW_HEADER_TYPE_POINT, 0, 1, 0, IW_SCAN_MAX_DATA, IW_DESCR_FLAG_NOMAX},
/* SIOCSIWESSID */
{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ESSID_MAX_SIZE + 1, IW_DESCR_FLAG_EVENT},
/* SIOCGIWESSID */
@@ -179,6 +185,25 @@
{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
/* SIOCGIWPOWER */
{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
+ /* -- hole -- */
+ { IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
+ /* -- hole -- */
+ { IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
+ /* SIOCSIWGENIE */
+ { IW_HEADER_TYPE_POINT, 0, 1, 0, IW_GENERIC_IE_MAX, 0},
+ /* SIOCGIWGENIE */
+ { IW_HEADER_TYPE_POINT, 0, 1, 0, IW_GENERIC_IE_MAX, 0},
+ /* SIOCSIWAUTH */
+ { IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
+ /* SIOCGIWAUTH */
+ { IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
+ /* SIOCSIWENCODEEXT */
+ { IW_HEADER_TYPE_POINT, 0, 1, sizeof(struct iw_encode_ext), sizeof(struct iw_encode_ext) + IW_ENCODING_TOKEN_MAX, 0},
+ /* SIOCGIWENCODEEXT */
+ { IW_HEADER_TYPE_POINT, 0, 1, sizeof(struct iw_encode_ext), sizeof(struct iw_encode_ext) + IW_ENCODING_TOKEN_MAX, 0},
+ /* SIOCSIWPMKSA */
+ { IW_HEADER_TYPE_POINT, 0, 1, sizeof(struct iw_pmksa), sizeof(struct iw_pmksa), 0},
+ /* -- hole -- */
};
static const int standard_ioctl_num = (sizeof(standard_ioctl) /
sizeof(struct iw_ioctl_description));
@@ -198,12 +223,22 @@
{ IW_HEADER_TYPE_ADDR, 0, 0, 0, 0, 0},
/* IWEVEXPIRED */
{ IW_HEADER_TYPE_ADDR, 0, 0, 0, 0, 0},
+ /* IWEVGENIE */
+ { IW_HEADER_TYPE_POINT, 0, 1, 0, IW_GENERIC_IE_MAX, 0},
+ /* IWEVMICHAELMICFAILURE */
+ { IW_HEADER_TYPE_POINT, 0, 1, 0, sizeof(struct iw_michaelmicfailure), 0},
+ /* IWEVASSOCREQIE */
+ { IW_HEADER_TYPE_POINT, 0, 1, 0, IW_GENERIC_IE_MAX, 0},
+ /* IWEVASSOCRESPIE */
+ { IW_HEADER_TYPE_POINT, 0, 1, 0, IW_GENERIC_IE_MAX, 0},
+ /* IWEVPMKIDCAND */
+ { IW_HEADER_TYPE_POINT, 0, 1, 0, sizeof(struct iw_pmkid_cand), 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[] = {
+static const char iw_priv_type_size[] = {
0, /* IW_PRIV_TYPE_NONE */
1, /* IW_PRIV_TYPE_BYTE */
1, /* IW_PRIV_TYPE_CHAR */
@@ -270,12 +305,15 @@
*/
static inline struct iw_statistics *get_wireless_stats(struct net_device *dev)
{
+ /* New location */
+ if((dev->wireless_handlers != NULL) &&
+ (dev->wireless_handlers->get_wireless_stats != NULL))
+ return dev->wireless_handlers->get_wireless_stats(dev);
+
+ /* Old location, will be phased out in next WE */
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... */
}
/* ---------------------------------------------------------------- */
@@ -310,14 +348,32 @@
/* ---------------------------------------------------------------- */
/*
- * Number of private arguments
+ * Calculate size 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];
+ return num * iw_priv_type_size[type];
+}
+
+/* ---------------------------------------------------------------- */
+/*
+ * Re-calculate the size of private arguments
+ */
+static inline int adjust_priv_size(__u16 args,
+ union iwreq_data * wrqu)
+{
+ int num = wrqu->data.length;
+ int max = args & IW_PRIV_SIZE_MASK;
+ int type = (args & IW_PRIV_TYPE_MASK) >> 12;
+
+ /* Make sure the driver doesn't goof up */
+ if (max < num)
+ num = max;
+
+ return num * iw_priv_type_size[type];
}
@@ -350,11 +406,14 @@
dev->name,
stats->status,
stats->qual.qual,
- stats->qual.updated & 1 ? '.' : ' ',
+ stats->qual.updated & IW_QUAL_QUAL_UPDATED
+ ? '.' : ' ',
((__u8) stats->qual.level),
- stats->qual.updated & 2 ? '.' : ' ',
+ stats->qual.updated & IW_QUAL_LEVEL_UPDATED
+ ? '.' : ' ',
((__u8) stats->qual.noise),
- stats->qual.updated & 4 ? '.' : ' ',
+ stats->qual.updated & IW_QUAL_NOISE_UPDATED
+ ? '.' : ' ',
stats->discard.nwid,
stats->discard.code,
stats->discard.fragment,
@@ -470,13 +529,15 @@
/* 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);
+ /* User space can't know in advance how large the buffer
+ * needs to be. Give it a hint, so that we can support
+ * any size buffer we want somewhat efficiently... */
+ 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;
@@ -505,7 +566,6 @@
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)
@@ -536,8 +596,14 @@
#endif /* WE_SET_EVENT */
} else {
char * extra;
+ int extra_size;
+ int user_length = 0;
int err;
+ /* Calculate space needed by arguments. Always allocate
+ * for max space. Easier, and won't last long... */
+ extra_size = descr->max_tokens * descr->token_size;
+
/* Check what user space is giving us */
if(IW_IS_SET(cmd)) {
/* Check NULL pointer */
@@ -554,18 +620,33 @@
if(iwr->u.data.pointer == NULL)
return -EFAULT;
/* Save user space buffer size for checking */
- user_size = iwr->u.data.length;
+ user_length = iwr->u.data.length;
+
+ /* Don't check if user_length > max to allow forward
+ * compatibility. The test user_length < min is
+ * implied by the test at the end. */
+
+ /* Support for very large requests */
+ if((descr->flags & IW_DESCR_FLAG_NOMAX) &&
+ (user_length > descr->max_tokens)) {
+ /* Allow userspace to GET more than max so
+ * we can support any size GET requests.
+ * There is still a limit : -ENOMEM. */
+ extra_size = user_length * descr->token_size;
+ /* Note : user_length is originally a __u16,
+ * and token_size is controlled by us,
+ * so extra_size won't get negative and
+ * won't overflow... */
+ }
}
#ifdef WE_IOCTL_DEBUG
printk(KERN_DEBUG "%s (WE) : Malloc %d bytes\n",
- dev->name, descr->max_tokens * descr->token_size);
+ dev->name, extra_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);
+ /* Create the kernel buffer */
+ extra = kmalloc(extra_size, GFP_KERNEL);
if (extra == NULL) {
return -ENOMEM;
}
@@ -591,14 +672,11 @@
/* 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);
+ if(user_length < 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 *
@@ -661,7 +739,7 @@
iw_handler handler)
{
struct iwreq * iwr = (struct iwreq *) ifr;
- struct iw_priv_args * descr = NULL;
+ const struct iw_priv_args * descr = NULL;
struct iw_request_info info;
int extra_size = 0;
int i;
@@ -701,7 +779,7 @@
((extra_size + offset) <= IFNAMSIZ))
extra_size = 0;
} else {
- /* Size of set arguments */
+ /* Size of get arguments */
extra_size = get_priv_size(descr->get_args);
/* Does it fits in iwr ? */
@@ -771,6 +849,14 @@
/* If we have something to return to the user */
if (!ret && IW_IS_GET(cmd)) {
+
+ /* Adjust for the actual length if it's variable,
+ * avoid leaking kernel bits outside. */
+ if (!(descr->get_args & IW_PRIV_SIZE_FIXED)) {
+ extra_size = adjust_priv_size(descr->get_args,
+ &(iwr->u));
+ }
+
err = copy_to_user(iwr->u.data.pointer, extra,
extra_size);
if (err)
@@ -1042,9 +1128,25 @@
* 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
*/
+/* ---------------------------------------------------------------- */
+/*
+ * Return the pointer to the spy data in the driver.
+ * Because this is called on the Rx path via wireless_spy_update(),
+ * we want it to be efficient...
+ */
+static inline struct iw_spy_data * get_spydata(struct net_device *dev)
+{
+ /* This is the new way */
+ if(dev->wireless_data)
+ return(dev->wireless_data->spy_data);
+
+ /* This is the old way. Doesn't work for multi-headed drivers.
+ * It will be removed in the next version of WE. */
+ return (dev->priv + dev->wireless_handlers->spy_offset);
+}
+
/*------------------------------------------------------------------*/
/*
* Standard Wireless Handler : set Spy List
@@ -1054,16 +1156,26 @@
union iwreq_data * wrqu,
char * extra)
{
-#ifdef IW_WIRELESS_SPY
- struct iw_spy_data * spydata = (dev->priv +
- dev->wireless_handlers->spy_offset);
+ struct iw_spy_data * spydata = get_spydata(dev);
struct sockaddr * address = (struct sockaddr *) extra;
+ /* Make sure driver is not buggy or using the old API */
+ if(!spydata)
+ return -EOPNOTSUPP;
+
/* 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. */
+ * While we copy addresses, any call to wireless_spy_update()
+ * will NOP. This is OK, as anyway the addresses are changing. */
spydata->spy_number = 0;
+ /* We want to operate without locking, because wireless_spy_update()
+ * most likely will happen in the interrupt handler, and therefore
+ * have its own locking constraints and needs performance.
+ * The rtnl_lock() make sure we don't race with the other iw_handlers.
+ * This make sure wireless_spy_update() "see" that the spy list
+ * is temporarily disabled. */
+ wmb();
+
/* Are there are addresses to copy? */
if(wrqu->data.length > 0) {
int i;
@@ -1089,13 +1201,14 @@
spydata->spy_address[i][5]);
#endif /* WE_SPY_DEBUG */
}
+
+ /* Make sure above is updated before re-enabling */
+ wmb();
+
/* Enable addresses */
spydata->spy_number = wrqu->data.length;
return 0;
-#else /* IW_WIRELESS_SPY */
- return -EOPNOTSUPP;
-#endif /* IW_WIRELESS_SPY */
}
/*------------------------------------------------------------------*/
@@ -1107,12 +1220,14 @@
union iwreq_data * wrqu,
char * extra)
{
-#ifdef IW_WIRELESS_SPY
- struct iw_spy_data * spydata = (dev->priv +
- dev->wireless_handlers->spy_offset);
+ struct iw_spy_data * spydata = get_spydata(dev);
struct sockaddr * address = (struct sockaddr *) extra;
int i;
+ /* Make sure driver is not buggy or using the old API */
+ if(!spydata)
+ return -EOPNOTSUPP;
+
wrqu->data.length = spydata->spy_number;
/* Copy addresses. */
@@ -1129,9 +1244,6 @@
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 */
}
/*------------------------------------------------------------------*/
@@ -1143,11 +1255,13 @@
union iwreq_data * wrqu,
char * extra)
{
-#ifdef IW_WIRELESS_THRSPY
- struct iw_spy_data * spydata = (dev->priv +
- dev->wireless_handlers->spy_offset);
+ struct iw_spy_data * spydata = get_spydata(dev);
struct iw_thrspy * threshold = (struct iw_thrspy *) extra;
+ /* Make sure driver is not buggy or using the old API */
+ if(!spydata)
+ return -EOPNOTSUPP;
+
/* Just do it */
memcpy(&(spydata->spy_thr_low), &(threshold->low),
2 * sizeof(struct iw_quality));
@@ -1160,9 +1274,6 @@
#endif /* WE_SPY_DEBUG */
return 0;
-#else /* IW_WIRELESS_THRSPY */
- return -EOPNOTSUPP;
-#endif /* IW_WIRELESS_THRSPY */
}
/*------------------------------------------------------------------*/
@@ -1174,22 +1285,20 @@
union iwreq_data * wrqu,
char * extra)
{
-#ifdef IW_WIRELESS_THRSPY
- struct iw_spy_data * spydata = (dev->priv +
- dev->wireless_handlers->spy_offset);
+ struct iw_spy_data * spydata = get_spydata(dev);
struct iw_thrspy * threshold = (struct iw_thrspy *) extra;
+ /* Make sure driver is not buggy or using the old API */
+ if(!spydata)
+ return -EOPNOTSUPP;
+
/* 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
@@ -1227,7 +1336,6 @@
/* Send event to user space */
wireless_send_event(dev, SIOCGIWTHRSPY, &wrqu, (char *) &threshold);
}
-#endif /* IW_WIRELESS_THRSPY */
/* ---------------------------------------------------------------- */
/*
@@ -1240,12 +1348,14 @@
unsigned char * address,
struct iw_quality * wstats)
{
-#ifdef IW_WIRELESS_SPY
- struct iw_spy_data * spydata = (dev->priv +
- dev->wireless_handlers->spy_offset);
+ struct iw_spy_data * spydata = get_spydata(dev);
int i;
int match = -1;
+ /* Make sure driver is not buggy or using the old API */
+ if(!spydata)
+ return;
+
#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 */
@@ -1257,7 +1367,7 @@
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
@@ -1277,6 +1387,4 @@
}
}
}
-#endif /* IW_WIRELESS_THRSPY */
-#endif /* IW_WIRELESS_SPY */
}
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