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Commit 3d23e349 authored by Johannes Berg's avatar Johannes Berg Committed by John W. Linville
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wext: refactor 

Refactor wext to
 * split out iwpriv handling
 * split out iwspy handling
 * split out procfs support
 * allow cfg80211 to have wireless extensions compat code
   w/o CONFIG_WIRELESS_EXT

After this, drivers need to
 - select WIRELESS_EXT	- for wext support
 - select WEXT_PRIV	- for iwpriv support
 - select WEXT_SPY	- for iwspy support

except cfg80211 -- which gets new hooks in wext-core.c
and can then get wext handlers without CONFIG_WIRELESS_EXT.

Wireless extensions procfs support is auto-selected
based on PROC_FS and anything that requires the wext core
(i.e. WIRELESS_EXT or CFG80211_WEXT).
Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent bc974f4a
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Showing with 1198 additions and 1195 deletions
drivers/net/wireless/Kconfig
View file @ 3d23e349
......@@ -67,6 +67,8 @@ config WAVELAN
tristate "AT&T/Lucent old WaveLAN & DEC RoamAbout DS ISA support"
depends on ISA && WLAN_PRE80211
select WIRELESS_EXT
select WEXT_SPY
select WEXT_PRIV
---help---
The Lucent WaveLAN (formerly NCR and AT&T; or DEC RoamAbout DS) is
a Radio LAN (wireless Ethernet-like Local Area Network) using the
......@@ -90,6 +92,8 @@ config PCMCIA_WAVELAN
tristate "AT&T/Lucent old WaveLAN Pcmcia wireless support"
depends on PCMCIA && WLAN_PRE80211
select WIRELESS_EXT
select WEXT_SPY
select WEXT_PRIV
help
Say Y here if you intend to attach an AT&T/Lucent Wavelan PCMCIA
(PC-card) wireless Ethernet networking card to your computer. This
......@@ -102,6 +106,7 @@ config PCMCIA_NETWAVE
tristate "Xircom Netwave AirSurfer Pcmcia wireless support"
depends on PCMCIA && WLAN_PRE80211
select WIRELESS_EXT
select WEXT_PRIV
help
Say Y here if you intend to attach this type of PCMCIA (PC-card)
wireless Ethernet networking card to your computer.
......@@ -123,6 +128,8 @@ config PCMCIA_RAYCS
tristate "Aviator/Raytheon 2.4GHz wireless support"
depends on PCMCIA && WLAN_80211
select WIRELESS_EXT
select WEXT_SPY
select WEXT_PRIV
---help---
Say Y here if you intend to attach an Aviator/Raytheon PCMCIA
(PC-card) wireless Ethernet networking card to your computer.
......@@ -136,6 +143,7 @@ config LIBERTAS
tristate "Marvell 8xxx Libertas WLAN driver support"
depends on WLAN_80211
select WIRELESS_EXT
select WEXT_SPY
select LIB80211
select FW_LOADER
---help---
......@@ -190,6 +198,8 @@ config AIRO
depends on ISA_DMA_API && WLAN_80211 && (PCI || BROKEN)
select WIRELESS_EXT
select CRYPTO
select WEXT_SPY
select WEXT_PRIV
---help---
This is the standard Linux driver to support Cisco/Aironet ISA and
PCI 802.11 wireless cards.
......@@ -207,6 +217,7 @@ config ATMEL
tristate "Atmel at76c50x chipset 802.11b support"
depends on (PCI || PCMCIA) && WLAN_80211
select WIRELESS_EXT
select WEXT_PRIV
select FW_LOADER
select CRC32
---help---
......@@ -266,18 +277,21 @@ config AIRO_CS
Cisco Linux utilities can be used to configure the card.
config PCMCIA_WL3501
tristate "Planet WL3501 PCMCIA cards"
depends on EXPERIMENTAL && PCMCIA && WLAN_80211
select WIRELESS_EXT
---help---
A driver for WL3501 PCMCIA 802.11 wireless cards made by Planet.
It has basic support for Linux wireless extensions and initial
micro support for ethtool.
tristate "Planet WL3501 PCMCIA cards"
depends on EXPERIMENTAL && PCMCIA && WLAN_80211
select WIRELESS_EXT
select WEXT_SPY
help
A driver for WL3501 PCMCIA 802.11 wireless cards made by Planet.
It has basic support for Linux wireless extensions and initial
micro support for ethtool.
config PRISM54
tristate 'Intersil Prism GT/Duette/Indigo PCI/Cardbus (DEPRECATED)'
depends on PCI && EXPERIMENTAL && WLAN_80211
select WIRELESS_EXT
select WEXT_SPY
select WEXT_PRIV
select FW_LOADER
---help---
This enables support for FullMAC PCI/Cardbus prism54 devices. This
......@@ -300,6 +314,7 @@ config USB_ZD1201
tristate "USB ZD1201 based Wireless device support"
depends on USB && WLAN_80211
select WIRELESS_EXT
select WEXT_PRIV
select FW_LOADER
---help---
Say Y if you want to use wireless LAN adapters based on the ZyDAS
......
drivers/net/wireless/hostap/Kconfig
View file @ 3d23e349
......@@ -2,6 +2,8 @@ config HOSTAP
tristate "IEEE 802.11 for Host AP (Prism2/2.5/3 and WEP/TKIP/CCMP)"
depends on WLAN_80211
select WIRELESS_EXT
select WEXT_SPY
select WEXT_PRIV
select CRYPTO
select CRYPTO_ARC4
select CRYPTO_ECB
......
drivers/net/wireless/ipw2x00/Kconfig
View file @ 3d23e349
......@@ -6,6 +6,8 @@ config IPW2100
tristate "Intel PRO/Wireless 2100 Network Connection"
depends on PCI && WLAN_80211 && CFG80211
select WIRELESS_EXT
select WEXT_SPY
select WEXT_PRIV
select FW_LOADER
select LIB80211
select LIBIPW
......@@ -65,6 +67,8 @@ config IPW2200
tristate "Intel PRO/Wireless 2200BG and 2915ABG Network Connection"
depends on PCI && WLAN_80211 && CFG80211
select WIRELESS_EXT
select WEXT_SPY
select WEXT_PRIV
select FW_LOADER
select LIB80211
select LIBIPW
......@@ -152,6 +156,7 @@ config LIBIPW
tristate
depends on PCI && WLAN_80211 && CFG80211
select WIRELESS_EXT
select WEXT_SPY
select CRYPTO
select CRYPTO_ARC4
select CRYPTO_ECB
......
drivers/net/wireless/orinoco/Kconfig
View file @ 3d23e349
......@@ -3,6 +3,8 @@ config HERMES
depends on (PPC_PMAC || PCI || PCMCIA) && WLAN_80211
depends on CFG80211
select WIRELESS_EXT
select WEXT_SPY
select WEXT_PRIV
select FW_LOADER
select CRYPTO
select CRYPTO_MICHAEL_MIC
......
include/net/cfg80211.h
View file @ 3d23e349
......@@ -1171,6 +1171,10 @@ struct wiphy {
struct net *_net;
#endif
#ifdef CONFIG_CFG80211_WEXT
const struct iw_handler_def *wext;
#endif
char priv[0] __attribute__((__aligned__(NETDEV_ALIGN)));
};
......@@ -1345,7 +1349,7 @@ struct wireless_dev {
struct cfg80211_internal_bss *auth_bsses[MAX_AUTH_BSSES];
struct cfg80211_internal_bss *current_bss; /* associated / joined */
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
/* wext data */
struct {
struct cfg80211_ibss_params ibss;
......
include/net/iw_handler.h
View file @ 3d23e349
......@@ -323,18 +323,19 @@ typedef int (*iw_handler)(struct net_device *dev, struct iw_request_info *info,
*/
struct iw_handler_def
{
/* Number of handlers defined (more precisely, index of the
* last defined handler + 1) */
__u16 num_standard;
__u16 num_private;
/* Number of private arg description */
__u16 num_private_args;
/* Array of handlers for standard ioctls
* We will call dev->wireless_handlers->standard[ioctl - SIOCSIWCOMMIT]
*/
const iw_handler * standard;
/* Number of handlers defined (more precisely, index of the
* last defined handler + 1) */
__u16 num_standard;
#ifdef CONFIG_WEXT_PRIV
__u16 num_private;
/* Number of private arg description */
__u16 num_private_args;
/* Array of handlers for private ioctls
* Will call dev->wireless_handlers->private[ioctl - SIOCIWFIRSTPRIV]
*/
......@@ -344,6 +345,7 @@ struct iw_handler_def
* can put it in any order you want and should not leave holes...
* We will automatically export that to user space... */
const struct iw_priv_args * private_args;
#endif
/* New location of get_wireless_stats, to de-bloat struct net_device.
* The old pointer in struct net_device will be gradually phased
......
include/net/net_namespace.h
View file @ 3d23e349
......@@ -80,7 +80,7 @@ struct net {
#ifdef CONFIG_XFRM
struct netns_xfrm xfrm;
#endif
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_WEXT_CORE
struct sk_buff_head wext_nlevents;
#endif
struct net_generic *gen;
......
include/net/wext.h
View file @ 3d23e349
#ifndef __NET_WEXT_H
#define __NET_WEXT_H
/*
* wireless extensions interface to the core code
*/
#include <net/iw_handler.h>
struct net;
#ifdef CONFIG_WIRELESS_EXT
extern int wext_proc_init(struct net *net);
extern void wext_proc_exit(struct net *net);
#ifdef CONFIG_WEXT_CORE
extern int wext_handle_ioctl(struct net *net, struct ifreq *ifr, unsigned int cmd,
void __user *arg);
extern int compat_wext_handle_ioctl(struct net *net, unsigned int cmd,
unsigned long arg);
extern struct iw_statistics *get_wireless_stats(struct net_device *dev);
extern int call_commit_handler(struct net_device *dev);
#else
static inline int wext_proc_init(struct net *net)
{
return 0;
}
static inline void wext_proc_exit(struct net *net)
{
return;
}
static inline int wext_handle_ioctl(struct net *net, struct ifreq *ifr, unsigned int cmd,
void __user *arg)
{
......@@ -36,4 +26,35 @@ static inline int compat_wext_handle_ioctl(struct net *net, unsigned int cmd,
}
#endif
#ifdef CONFIG_WEXT_PROC
extern int wext_proc_init(struct net *net);
extern void wext_proc_exit(struct net *net);
#else
static inline int wext_proc_init(struct net *net)
{
return 0;
}
static inline void wext_proc_exit(struct net *net)
{
return;
}
#endif
#ifdef CONFIG_WEXT_PRIV
int ioctl_private_call(struct net_device *dev, struct iwreq *iwr,
unsigned int cmd, struct iw_request_info *info,
iw_handler handler);
int compat_private_call(struct net_device *dev, struct iwreq *iwr,
unsigned int cmd, struct iw_request_info *info,
iw_handler handler);
int iw_handler_get_private(struct net_device * dev,
struct iw_request_info * info,
union iwreq_data * wrqu,
char * extra);
#else
#define ioctl_private_call NULL
#define compat_private_call NULL
#endif
#endif /* __NET_WEXT_H */
net/core/net-sysfs.c
View file @ 3d23e349
......@@ -543,8 +543,12 @@ int netdev_register_kobject(struct net_device *net)
*groups++ = &netstat_group;
#ifdef CONFIG_WIRELESS_EXT_SYSFS
if (net->wireless_handlers || net->ieee80211_ptr)
if (net->ieee80211_ptr)
*groups++ = &wireless_group;
#ifdef CONFIG_WIRELESS_EXT
else if (net->wireless_handlers)
*groups++ = &wireless_group;
#endif
#endif
#endif /* CONFIG_SYSFS */
......
net/socket.c
View file @ 3d23e349
......@@ -905,11 +905,11 @@ static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg)
if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
err = dev_ioctl(net, cmd, argp);
} else
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_WEXT_CORE
if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) {
err = dev_ioctl(net, cmd, argp);
} else
#endif /* CONFIG_WIRELESS_EXT */
#endif
switch (cmd) {
case FIOSETOWN:
case SIOCSPGRP:
......
net/wireless/Kconfig
View file @ 3d23e349
config WIRELESS_EXT
bool
config WEXT_CORE
def_bool y
depends on CFG80211_WEXT || WIRELESS_EXT
config WEXT_PROC
def_bool y
depends on PROC_FS
depends on WEXT_CORE
config WEXT_SPY
bool
config WEXT_PRIV
bool
config CFG80211
tristate "cfg80211 - wireless configuration API"
depends on RFKILL || !RFKILL
......@@ -56,6 +74,12 @@ config CFG80211_REG_DEBUG
If unsure, say N.
config CFG80211_DEFAULT_PS_VALUE
int
default 1 if CFG80211_DEFAULT_PS
default 0
depends on CFG80211
config CFG80211_DEFAULT_PS
bool "enable powersave by default"
depends on CFG80211
......@@ -67,14 +91,10 @@ config CFG80211_DEFAULT_PS
applications instead -- they need to register their network
latency requirement, see Documentation/power/pm_qos_interface.txt.
config CFG80211_DEFAULT_PS_VALUE
int
default 1 if CFG80211_DEFAULT_PS
default 0
config CFG80211_DEBUGFS
bool "cfg80211 DebugFS entries"
depends on CFG80211 && DEBUG_FS
depends on CFG80211
depends on DEBUG_FS
---help---
You can enable this if you want to debugfs entries for cfg80211.
......@@ -83,6 +103,7 @@ config CFG80211_DEBUGFS
config WIRELESS_OLD_REGULATORY
bool "Old wireless static regulatory definitions"
default n
depends on CFG80211
---help---
This option enables the old static regulatory information
and uses it within the new framework. This option is available
......@@ -94,20 +115,19 @@ config WIRELESS_OLD_REGULATORY
Say N and if you say Y, please tell us why. The default is N.
config WIRELESS_EXT
bool "Wireless extensions"
config CFG80211_WEXT
bool "cfg80211 wireless extensions compatibility"
depends on CFG80211
select WEXT_CORE
default y
---help---
This option enables the legacy wireless extensions
(wireless network interface configuration via ioctls.)
Say Y unless you've upgraded all your userspace to use
nl80211 instead of wireless extensions.
help
Enable this option if you need old userspace for wireless
extensions with cfg80211-based drivers.
config WIRELESS_EXT_SYSFS
bool "Wireless extensions sysfs files"
default y
depends on WIRELESS_EXT && SYSFS
depends on WEXT_CORE && SYSFS
help
This option enables the deprecated wireless statistics
files in /sys/class/net/*/wireless/. The same information
......
net/wireless/Makefile
View file @ 3d23e349
obj-$(CONFIG_WIRELESS_EXT) += wext.o
obj-$(CONFIG_CFG80211) += cfg80211.o
obj-$(CONFIG_LIB80211) += lib80211.o
obj-$(CONFIG_LIB80211_CRYPT_WEP) += lib80211_crypt_wep.o
obj-$(CONFIG_LIB80211_CRYPT_CCMP) += lib80211_crypt_ccmp.o
obj-$(CONFIG_LIB80211_CRYPT_TKIP) += lib80211_crypt_tkip.o
obj-$(CONFIG_WEXT_CORE) += wext-core.o
obj-$(CONFIG_WEXT_PROC) += wext-proc.o
obj-$(CONFIG_WEXT_SPY) += wext-spy.o
obj-$(CONFIG_WEXT_PRIV) += wext-priv.o
cfg80211-y += core.o sysfs.o radiotap.o util.o reg.o scan.o nl80211.o
cfg80211-y += mlme.o ibss.o sme.o chan.o
cfg80211-$(CONFIG_CFG80211_DEBUGFS) += debugfs.o
cfg80211-$(CONFIG_WIRELESS_EXT) += wext-compat.o wext-sme.o
cfg80211-$(CONFIG_CFG80211_WEXT) += wext-compat.o wext-sme.o
ccflags-y += -D__CHECK_ENDIAN__
net/wireless/core.c
View file @ 3d23e349
......@@ -358,6 +358,10 @@ struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
INIT_LIST_HEAD(&rdev->bss_list);
INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
#ifdef CONFIG_CFG80211_WEXT
rdev->wiphy.wext = &cfg80211_wext_handler;
#endif
device_initialize(&rdev->wiphy.dev);
rdev->wiphy.dev.class = &ieee80211_class;
rdev->wiphy.dev.platform_data = rdev;
......@@ -672,9 +676,7 @@ static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
wdev->netdev = dev;
wdev->sme_state = CFG80211_SME_IDLE;
mutex_unlock(&rdev->devlist_mtx);
#ifdef CONFIG_WIRELESS_EXT
if (!dev->wireless_handlers)
dev->wireless_handlers = &cfg80211_wext_handler;
#ifdef CONFIG_CFG80211_WEXT
wdev->wext.default_key = -1;
wdev->wext.default_mgmt_key = -1;
wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
......@@ -696,7 +698,7 @@ static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
break;
case NL80211_IFTYPE_STATION:
wdev_lock(wdev);
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
kfree(wdev->wext.ie);
wdev->wext.ie = NULL;
wdev->wext.ie_len = 0;
......@@ -728,7 +730,7 @@ static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
mutex_unlock(&rdev->devlist_mtx);
dev_put(dev);
}
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
cfg80211_lock_rdev(rdev);
mutex_lock(&rdev->devlist_mtx);
wdev_lock(wdev);
......@@ -766,7 +768,7 @@ static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
sysfs_remove_link(&dev->dev.kobj, "phy80211");
list_del_init(&wdev->list);
rdev->devlist_generation++;
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
kfree(wdev->wext.keys);
#endif
}
......
net/wireless/ibss.c
View file @ 3d23e349
......@@ -15,7 +15,7 @@ void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_bss *bss;
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
union iwreq_data wrqu;
#endif
......@@ -44,7 +44,7 @@ void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid)
nl80211_send_ibss_bssid(wiphy_to_dev(wdev->wiphy), dev, bssid,
GFP_KERNEL);
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
memset(&wrqu, 0, sizeof(wrqu));
memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
......@@ -96,7 +96,7 @@ int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
kfree(wdev->connect_keys);
wdev->connect_keys = connkeys;
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
wdev->wext.ibss.channel = params->channel;
#endif
err = rdev->ops->join_ibss(&rdev->wiphy, dev, params);
......@@ -154,7 +154,7 @@ static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
wdev->current_bss = NULL;
wdev->ssid_len = 0;
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
if (!nowext)
wdev->wext.ibss.ssid_len = 0;
#endif
......@@ -203,7 +203,7 @@ int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
return err;
}
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev)
{
......
net/wireless/mlme.c
View file @ 3d23e349
......@@ -331,7 +331,7 @@ void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr,
{
struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
union iwreq_data wrqu;
char *buf = kmalloc(128, gfp);
......
net/wireless/nl80211.c
View file @ 3d23e349
......@@ -1264,7 +1264,7 @@ static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
if (!err)
err = func(&rdev->wiphy, dev, key.idx);
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
if (!err) {
if (func == rdev->ops->set_default_key)
dev->ieee80211_ptr->wext.default_key = key.idx;
......@@ -1365,7 +1365,7 @@ static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
if (!err)
err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, mac_addr);
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
if (!err) {
if (key.idx == dev->ieee80211_ptr->wext.default_key)
dev->ieee80211_ptr->wext.default_key = -1;
......
net/wireless/scan.c
View file @ 3d23e349
......@@ -22,7 +22,7 @@ void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak)
{
struct cfg80211_scan_request *request;
struct net_device *dev;
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
union iwreq_data wrqu;
#endif
......@@ -47,7 +47,7 @@ void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak)
else
nl80211_send_scan_done(rdev, dev);
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
if (!request->aborted) {
memset(&wrqu, 0, sizeof(wrqu));
......@@ -592,7 +592,7 @@ void cfg80211_unlink_bss(struct wiphy *wiphy, struct cfg80211_bss *pub)
}
EXPORT_SYMBOL(cfg80211_unlink_bss);
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
int cfg80211_wext_siwscan(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
......
net/wireless/sme.c
View file @ 3d23e349
......@@ -345,7 +345,7 @@ void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
u8 *country_ie;
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
union iwreq_data wrqu;
#endif
......@@ -362,7 +362,7 @@ void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
resp_ie, resp_ie_len,
status, GFP_KERNEL);
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
if (wextev) {
if (req_ie && status == WLAN_STATUS_SUCCESS) {
memset(&wrqu, 0, sizeof(wrqu));
......@@ -477,7 +477,7 @@ void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid,
const u8 *resp_ie, size_t resp_ie_len)
{
struct cfg80211_bss *bss;
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
union iwreq_data wrqu;
#endif
......@@ -512,7 +512,7 @@ void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid,
req_ie, req_ie_len, resp_ie, resp_ie_len,
GFP_KERNEL);
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
if (req_ie) {
memset(&wrqu, 0, sizeof(wrqu));
wrqu.data.length = req_ie_len;
......@@ -573,7 +573,7 @@ void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
int i;
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
union iwreq_data wrqu;
#endif
......@@ -631,7 +631,7 @@ void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
for (i = 0; i < 6; i++)
rdev->ops->del_key(wdev->wiphy, dev, i, NULL);
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_CFG80211_WEXT
memset(&wrqu, 0, sizeof(wrqu));
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
......
net/wireless/wext.c → net/wireless/wext-core.c
View file @ 3d23e349
/*
* This file implement the Wireless Extensions APIs.
* This file implement the Wireless Extensions core API.
*
* Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com>
* Copyright (c) 1997-2007 Jean Tourrilhes, All Rights Reserved.
* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
*
* (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
*
* 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
*
* v7 - 18.3.05 - Jean II
* o Remove (struct iw_point *)->pointer from events and streams
* o Remove spy_offset from struct iw_handler_def
* o Start deprecating dev->get_wireless_stats, output a warning
* o If IW_QUAL_DBM is set, show dBm values in /proc/net/wireless
* o Don't lose INVALID/DBM flags when clearing UPDATED flags (iwstats)
*
* v8 - 17.02.06 - Jean II
* o RtNetlink requests support (SET/GET)
*
* v8b - 03.08.06 - Herbert Xu
* o Fix Wireless Event locking issues.
*
* v9 - 14.3.06 - Jean II
* o Change length in ESSID and NICK to strlen() instead of strlen()+1
* o Make standard_ioctl_num and standard_event_num unsigned
* o Remove (struct net_device *)->get_wireless_stats()
*
* v10 - 16.3.07 - Jean II
* o Prevent leaking of kernel space in stream on 64 bits.
*/
/***************************** INCLUDES *****************************/
#include <linux/module.h>
#include <linux/types.h> /* off_t */
#include <linux/netdevice.h> /* struct ifreq, dev_get_by_name() */
#include <linux/proc_fs.h>
#include <linux/rtnetlink.h> /* rtnetlink stuff */
#include <linux/seq_file.h>
#include <linux/init.h> /* for __init */
#include <linux/if_arp.h> /* ARPHRD_ETHER */
#include <linux/etherdevice.h> /* compare_ether_addr */
#include <linux/interrupt.h>
#include <net/net_namespace.h>
#include <linux/wireless.h> /* Pretty obvious */
#include <net/iw_handler.h> /* New driver API */
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/rtnetlink.h>
#include <linux/wireless.h>
#include <linux/uaccess.h>
#include <net/cfg80211.h>
#include <net/iw_handler.h>
#include <net/netlink.h>
#include <net/wext.h>
#include <net/net_namespace.h>
typedef int (*wext_ioctl_func)(struct net_device *, struct iwreq *,
unsigned int, struct iw_request_info *,
iw_handler);
#include <asm/uaccess.h> /* copy_to_user() */
/************************* 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.
......@@ -390,18 +306,6 @@ static const struct iw_ioctl_description standard_event[] = {
};
static const unsigned standard_event_num = ARRAY_SIZE(standard_event);
/* Size (in bytes) of the various private data types */
static const char iw_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 */
......@@ -433,338 +337,361 @@ static const int compat_event_type_size[] = {
};
#endif
/************************ 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.
*/
static 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
*/
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);
/* Not found */
return NULL;
}
/* ---------------------------------------------------------------- */
/*
* 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 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 */
}
/* ---------------------------------------------------------------- */
/*
* Calculate size of private arguments
*/
static int get_priv_size(__u16 args)
{
int num = args & IW_PRIV_SIZE_MASK;
int type = (args & IW_PRIV_TYPE_MASK) >> 12;
return num * iw_priv_type_size[type];
}
/* ---------------------------------------------------------------- */
/*
* Re-calculate the size of private arguments
*/
static int adjust_priv_size(__u16 args, struct iw_point *iwp)
{
int num = iwp->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];
}
/* IW event code */
/* ---------------------------------------------------------------- */
/*
* Standard Wireless Handler : get wireless stats
* Allow programatic access to /proc/net/wireless even if /proc
* doesn't exist... Also more efficient...
*/
static int iw_handler_get_iwstats(struct net_device * dev,
struct iw_request_info * info,
union iwreq_data * wrqu,
char * extra)
static int __net_init wext_pernet_init(struct net *net)
{
/* Get stats from the driver */
struct iw_statistics *stats;
stats = get_wireless_stats(dev);
if (stats) {
/* Copy statistics to extra */
memcpy(extra, stats, sizeof(struct iw_statistics));
wrqu->data.length = sizeof(struct iw_statistics);
/* Check if we need to clear the updated flag */
if (wrqu->data.flags != 0)
stats->qual.updated &= ~IW_QUAL_ALL_UPDATED;
return 0;
} else
return -EOPNOTSUPP;
skb_queue_head_init(&net->wext_nlevents);
return 0;
}
/* ---------------------------------------------------------------- */
/*
* Standard Wireless Handler : get iwpriv definitions
* Export the driver private handler definition
* They will be picked up by tools like iwpriv...
*/
static int iw_handler_get_private(struct net_device * dev,
struct iw_request_info * info,
union iwreq_data * wrqu,
char * extra)
static void __net_exit wext_pernet_exit(struct net *net)
{
/* 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 if there is enough buffer up there */
if (wrqu->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... */
wrqu->data.length = dev->wireless_handlers->num_private_args;
return -E2BIG;
}
/* Set the number of available ioctls. */
wrqu->data.length = dev->wireless_handlers->num_private_args;
/* Copy structure to the user buffer. */
memcpy(extra, dev->wireless_handlers->private_args,
sizeof(struct iw_priv_args) * wrqu->data.length);
return 0;
skb_queue_purge(&net->wext_nlevents);
}
static struct pernet_operations wext_pernet_ops = {
.init = wext_pernet_init,
.exit = wext_pernet_exit,
};
/******************** /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 void wireless_seq_printf_stats(struct seq_file *seq,
struct net_device *dev)
static int __init wireless_nlevent_init(void)
{
/* Get stats from the driver */
struct iw_statistics *stats = get_wireless_stats(dev);
static struct iw_statistics nullstats = {};
/* show device if it's wireless regardless of current stats */
if (!stats && dev->wireless_handlers)
stats = &nullstats;
if (stats) {
seq_printf(seq, "%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 & IW_QUAL_QUAL_UPDATED
? '.' : ' ',
((__s32) stats->qual.level) -
((stats->qual.updated & IW_QUAL_DBM) ? 0x100 : 0),
stats->qual.updated & IW_QUAL_LEVEL_UPDATED
? '.' : ' ',
((__s32) stats->qual.noise) -
((stats->qual.updated & IW_QUAL_DBM) ? 0x100 : 0),
stats->qual.updated & IW_QUAL_NOISE_UPDATED
? '.' : ' ',
stats->discard.nwid, stats->discard.code,
stats->discard.fragment, stats->discard.retries,
stats->discard.misc, stats->miss.beacon);
if (stats != &nullstats)
stats->qual.updated &= ~IW_QUAL_ALL_UPDATED;
}
return register_pernet_subsys(&wext_pernet_ops);
}
/* ---------------------------------------------------------------- */
/*
* Print info for /proc/net/wireless (print all entries)
*/
static int wireless_dev_seq_show(struct seq_file *seq, void *v)
{
might_sleep();
if (v == SEQ_START_TOKEN)
seq_printf(seq, "Inter-| sta-| Quality | Discarded "
"packets | Missed | WE\n"
" face | tus | link level noise | nwid "
"crypt frag retry misc | beacon | %d\n",
WIRELESS_EXT);
else
wireless_seq_printf_stats(seq, v);
return 0;
}
subsys_initcall(wireless_nlevent_init);
static void *wireless_dev_seq_start(struct seq_file *seq, loff_t *pos)
/* Process events generated by the wireless layer or the driver. */
static void wireless_nlevent_process(struct work_struct *work)
{
struct net *net = seq_file_net(seq);
loff_t off;
struct net_device *dev;
struct sk_buff *skb;
struct net *net;
rtnl_lock();
if (!*pos)
return SEQ_START_TOKEN;
off = 1;
for_each_netdev(net, dev)
if (off++ == *pos)
return dev;
return NULL;
}
static void *wireless_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
struct net *net = seq_file_net(seq);
++*pos;
return v == SEQ_START_TOKEN ?
first_net_device(net) : next_net_device(v);
}
for_each_net(net) {
while ((skb = skb_dequeue(&net->wext_nlevents)))
rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL,
GFP_KERNEL);
}
static void wireless_dev_seq_stop(struct seq_file *seq, void *v)
{
rtnl_unlock();
}
static const struct seq_operations wireless_seq_ops = {
.start = wireless_dev_seq_start,
.next = wireless_dev_seq_next,
.stop = wireless_dev_seq_stop,
.show = wireless_dev_seq_show,
};
static DECLARE_WORK(wireless_nlevent_work, wireless_nlevent_process);
static int seq_open_wireless(struct inode *inode, struct file *file)
static struct nlmsghdr *rtnetlink_ifinfo_prep(struct net_device *dev,
struct sk_buff *skb)
{
return seq_open_net(inode, file, &wireless_seq_ops,
sizeof(struct seq_net_private));
}
struct ifinfomsg *r;
struct nlmsghdr *nlh;
static const struct file_operations wireless_seq_fops = {
.owner = THIS_MODULE,
.open = seq_open_wireless,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_net,
};
nlh = nlmsg_put(skb, 0, 0, RTM_NEWLINK, sizeof(*r), 0);
if (!nlh)
return NULL;
int wext_proc_init(struct net *net)
{
/* Create /proc/net/wireless entry */
if (!proc_net_fops_create(net, "wireless", S_IRUGO, &wireless_seq_fops))
return -ENOMEM;
r = nlmsg_data(nlh);
r->ifi_family = AF_UNSPEC;
r->__ifi_pad = 0;
r->ifi_type = dev->type;
r->ifi_index = dev->ifindex;
r->ifi_flags = dev_get_flags(dev);
r->ifi_change = 0; /* Wireless changes don't affect those flags */
return 0;
}
NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
void wext_proc_exit(struct net *net)
{
proc_net_remove(net, "wireless");
return nlh;
nla_put_failure:
nlmsg_cancel(skb, nlh);
return NULL;
}
#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.
* Main event dispatcher. Called from other parts and drivers.
* Send the event on the appropriate channels.
* May be called from interrupt context.
*/
/* ---------------------------------------------------------------- */
static int ioctl_standard_iw_point(struct iw_point *iwp, unsigned int cmd,
const struct iw_ioctl_description *descr,
iw_handler handler, struct net_device *dev,
struct iw_request_info *info)
void wireless_send_event(struct net_device * dev,
unsigned int cmd,
union iwreq_data * wrqu,
const char * extra)
{
int err, extra_size, user_length = 0, essid_compat = 0;
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 */
int wrqu_off = 0; /* Offset in wrqu */
/* Don't "optimise" the following variable, it will crash */
unsigned cmd_index; /* *MUST* be unsigned */
struct sk_buff *skb;
struct nlmsghdr *nlh;
struct nlattr *nla;
#ifdef CONFIG_COMPAT
struct __compat_iw_event *compat_event;
struct compat_iw_point compat_wrqu;
struct sk_buff *compskb;
#endif
/* Calculate space needed by arguments. Always allocate
* for max space.
/*
* Nothing in the kernel sends scan events with data, be safe.
* This is necessary because we cannot fix up scan event data
* for compat, due to being contained in 'extra', but normally
* applications are required to retrieve the scan data anyway
* and no data is included in the event, this codifies that
* practice.
*/
extra_size = descr->max_tokens * descr->token_size;
if (WARN_ON(cmd == SIOCGIWSCAN && extra))
extra = NULL;
/* Check need for ESSID compatibility for WE < 21 */
switch (cmd) {
/* Get the description of the Event */
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;
}
/* 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;
/* Always at an offset in wrqu */
wrqu_off = IW_EV_POINT_OFF;
}
/* Total length of the event */
hdr_len = event_type_size[descr->header_type];
event_len = hdr_len + extra_len;
/*
* The problem for 64/32 bit.
*
* On 64-bit, a regular event is laid out as follows:
* | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
* | event.len | event.cmd | p a d d i n g |
* | wrqu data ... (with the correct size) |
*
* This padding exists because we manipulate event->u,
* and 'event' is not packed.
*
* An iw_point event is laid out like this instead:
* | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
* | event.len | event.cmd | p a d d i n g |
* | iwpnt.len | iwpnt.flg | p a d d i n g |
* | extra data ...
*
* The second padding exists because struct iw_point is extended,
* but this depends on the platform...
*
* On 32-bit, all the padding shouldn't be there.
*/
skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
if (!skb)
return;
/* Send via the RtNetlink event channel */
nlh = rtnetlink_ifinfo_prep(dev, skb);
if (WARN_ON(!nlh)) {
kfree_skb(skb);
return;
}
/* Add the wireless events in the netlink packet */
nla = nla_reserve(skb, IFLA_WIRELESS, event_len);
if (!nla) {
kfree_skb(skb);
return;
}
event = nla_data(nla);
/* Fill event - first clear to avoid data leaking */
memset(event, 0, hdr_len);
event->len = event_len;
event->cmd = cmd;
memcpy(&event->u, ((char *) wrqu) + wrqu_off, hdr_len - IW_EV_LCP_LEN);
if (extra_len)
memcpy(((char *) event) + hdr_len, extra, extra_len);
nlmsg_end(skb, nlh);
#ifdef CONFIG_COMPAT
hdr_len = compat_event_type_size[descr->header_type];
event_len = hdr_len + extra_len;
compskb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
if (!compskb) {
kfree_skb(skb);
return;
}
/* Send via the RtNetlink event channel */
nlh = rtnetlink_ifinfo_prep(dev, compskb);
if (WARN_ON(!nlh)) {
kfree_skb(skb);
kfree_skb(compskb);
return;
}
/* Add the wireless events in the netlink packet */
nla = nla_reserve(compskb, IFLA_WIRELESS, event_len);
if (!nla) {
kfree_skb(skb);
kfree_skb(compskb);
return;
}
compat_event = nla_data(nla);
compat_event->len = event_len;
compat_event->cmd = cmd;
if (descr->header_type == IW_HEADER_TYPE_POINT) {
compat_wrqu.length = wrqu->data.length;
compat_wrqu.flags = wrqu->data.flags;
memcpy(&compat_event->pointer,
((char *) &compat_wrqu) + IW_EV_COMPAT_POINT_OFF,
hdr_len - IW_EV_COMPAT_LCP_LEN);
if (extra_len)
memcpy(((char *) compat_event) + hdr_len,
extra, extra_len);
} else {
/* extra_len must be zero, so no if (extra) needed */
memcpy(&compat_event->pointer, wrqu,
hdr_len - IW_EV_COMPAT_LCP_LEN);
}
nlmsg_end(compskb, nlh);
skb_shinfo(skb)->frag_list = compskb;
#endif
skb_queue_tail(&dev_net(dev)->wext_nlevents, skb);
schedule_work(&wireless_nlevent_work);
}
EXPORT_SYMBOL(wireless_send_event);
/* IW handlers */
struct iw_statistics *get_wireless_stats(struct net_device *dev)
{
#ifdef CONFIG_WIRELESS_EXT
if ((dev->wireless_handlers != NULL) &&
(dev->wireless_handlers->get_wireless_stats != NULL))
return dev->wireless_handlers->get_wireless_stats(dev);
#endif
#ifdef CONFIG_CFG80211_WEXT
if (dev->ieee80211_ptr && dev->ieee80211_ptr &&
dev->ieee80211_ptr->wiphy &&
dev->ieee80211_ptr->wiphy->wext &&
dev->ieee80211_ptr->wiphy->wext->get_wireless_stats)
return dev->ieee80211_ptr->wiphy->wext->get_wireless_stats(dev);
#endif
/* not found */
return NULL;
}
static int iw_handler_get_iwstats(struct net_device * dev,
struct iw_request_info * info,
union iwreq_data * wrqu,
char * extra)
{
/* Get stats from the driver */
struct iw_statistics *stats;
stats = get_wireless_stats(dev);
if (stats) {
/* Copy statistics to extra */
memcpy(extra, stats, sizeof(struct iw_statistics));
wrqu->data.length = sizeof(struct iw_statistics);
/* Check if we need to clear the updated flag */
if (wrqu->data.flags != 0)
stats->qual.updated &= ~IW_QUAL_ALL_UPDATED;
return 0;
} else
return -EOPNOTSUPP;
}
static 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 */
const struct iw_handler_def *handlers = NULL;
#ifdef CONFIG_CFG80211_WEXT
if (dev->ieee80211_ptr && dev->ieee80211_ptr->wiphy)
handlers = dev->ieee80211_ptr->wiphy->wext;
#endif
#ifdef CONFIG_WIRELESS_EXT
if (dev->wireless_handlers)
handlers = dev->wireless_handlers;
#endif
if (!handlers)
return NULL;
/* Try as a standard command */
index = cmd - SIOCIWFIRST;
if (index < handlers->num_standard)
return handlers->standard[index];
#ifdef CONFIG_WEXT_PRIV
/* Try as a private command */
index = cmd - SIOCIWFIRSTPRIV;
if (index < handlers->num_private)
return handlers->private[index];
#endif
/* Not found */
return NULL;
}
static int ioctl_standard_iw_point(struct iw_point *iwp, unsigned int cmd,
const struct iw_ioctl_description *descr,
iw_handler handler, struct net_device *dev,
struct iw_request_info *info)
{
int err, extra_size, user_length = 0, essid_compat = 0;
char *extra;
/* Calculate space needed by arguments. Always allocate
* for max space.
*/
extra_size = descr->max_tokens * descr->token_size;
/* Check need for ESSID compatibility for WE < 21 */
switch (cmd) {
case SIOCSIWESSID:
case SIOCGIWESSID:
case SIOCSIWNICKN:
......@@ -893,188 +820,39 @@ static int ioctl_standard_iw_point(struct iw_point *iwp, unsigned int cmd,
}
/*
* 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.
* 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 int ioctl_standard_call(struct net_device * dev,
struct iwreq *iwr,
unsigned int cmd,
struct iw_request_info *info,
iw_handler handler)
int call_commit_handler(struct net_device *dev)
{
const struct iw_ioctl_description * descr;
int ret = -EINVAL;
/* Get the description of the IOCTL */
if ((cmd - SIOCIWFIRST) >= standard_ioctl_num)
return -EOPNOTSUPP;
descr = &(standard_ioctl[cmd - SIOCIWFIRST]);
/* 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);
/* 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);
} else {
ret = ioctl_standard_iw_point(&iwr->u.data, cmd, descr,
handler, dev, info);
}
/* 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 int get_priv_descr_and_size(struct net_device *dev, unsigned int cmd,
const struct iw_priv_args **descrp)
{
const struct iw_priv_args *descr;
int i, extra_size;
descr = NULL;
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;
}
}
extra_size = 0;
if (descr) {
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 get 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;
}
}
*descrp = descr;
return extra_size;
}
static int ioctl_private_iw_point(struct iw_point *iwp, unsigned int cmd,
const struct iw_priv_args *descr,
iw_handler handler, struct net_device *dev,
struct iw_request_info *info, int extra_size)
{
char *extra;
int err;
/* Check what user space is giving us */
if (IW_IS_SET(cmd)) {
if (!iwp->pointer && iwp->length != 0)
return -EFAULT;
if (iwp->length > (descr->set_args & IW_PRIV_SIZE_MASK))
return -E2BIG;
} else if (!iwp->pointer)
return -EFAULT;
extra = kmalloc(extra_size, GFP_KERNEL);
if (!extra)
return -ENOMEM;
/* If it is a SET, get all the extra data in here */
if (IW_IS_SET(cmd) && (iwp->length != 0)) {
if (copy_from_user(extra, iwp->pointer, extra_size)) {
err = -EFAULT;
goto out;
}
}
/* Call the handler */
err = handler(dev, info, (union iwreq_data *) iwp, extra);
/* If we have something to return to the user */
if (!err && 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, iwp);
if (copy_to_user(iwp->pointer, extra, extra_size))
err = -EFAULT;
}
out:
kfree(extra);
return err;
}
static int ioctl_private_call(struct net_device *dev, struct iwreq *iwr,
unsigned int cmd, struct iw_request_info *info,
iw_handler handler)
{
int extra_size = 0, ret = -EINVAL;
const struct iw_priv_args *descr;
extra_size = get_priv_descr_and_size(dev, cmd, &descr);
/* 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 {
ret = ioctl_private_iw_point(&iwr->u.data, cmd, descr,
handler, dev, info, extra_size);
}
/* Call commit handler if needed and defined */
if (ret == -EIWCOMMIT)
ret = call_commit_handler(dev);
return ret;
#ifdef CONFIG_WIRELESS_EXT
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 */
#else
/* cfg80211 has no commit */
return 0;
#endif
}
/* ---------------------------------------------------------------- */
typedef int (*wext_ioctl_func)(struct net_device *, struct iwreq *,
unsigned int, struct iw_request_info *,
iw_handler);
/*
* Main IOCTl dispatcher.
* Check the type of IOCTL and call the appropriate wrapper...
......@@ -1103,9 +881,11 @@ static int wireless_process_ioctl(struct net *net, struct ifreq *ifr,
return standard(dev, iwr, cmd, info,
&iw_handler_get_iwstats);
#ifdef CONFIG_WEXT_PRIV
if (cmd == SIOCGIWPRIV && dev->wireless_handlers)
return standard(dev, iwr, cmd, info,
&iw_handler_get_private);
iw_handler_get_private);
#endif
/* Basic check */
if (!netif_device_present(dev))
......@@ -1117,7 +897,7 @@ static int wireless_process_ioctl(struct net *net, struct ifreq *ifr,
/* Standard and private are not the same */
if (cmd < SIOCIWFIRSTPRIV)
return standard(dev, iwr, cmd, info, handler);
else
else if (private)
return private(dev, iwr, cmd, info, handler);
}
/* Old driver API : call driver ioctl handler */
......@@ -1157,6 +937,50 @@ static int wext_ioctl_dispatch(struct net *net, struct ifreq *ifr,
return ret;
}
/*
* 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 int ioctl_standard_call(struct net_device * dev,
struct iwreq *iwr,
unsigned int cmd,
struct iw_request_info *info,
iw_handler handler)
{
const struct iw_ioctl_description * descr;
int ret = -EINVAL;
/* Get the description of the IOCTL */
if ((cmd - SIOCIWFIRST) >= standard_ioctl_num)
return -EOPNOTSUPP;
descr = &(standard_ioctl[cmd - SIOCIWFIRST]);
/* 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);
/* 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);
} else {
ret = ioctl_standard_iw_point(&iwr->u.data, cmd, descr,
handler, dev, info);
}
/* 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;
}
int wext_handle_ioctl(struct net *net, struct ifreq *ifr, unsigned int cmd,
void __user *arg)
{
......@@ -1205,43 +1029,6 @@ static int compat_standard_call(struct net_device *dev,
return err;
}
static int compat_private_call(struct net_device *dev, struct iwreq *iwr,
unsigned int cmd, struct iw_request_info *info,
iw_handler handler)
{
const struct iw_priv_args *descr;
int ret, extra_size;
extra_size = get_priv_descr_and_size(dev, cmd, &descr);
/* 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 {
struct compat_iw_point *iwp_compat;
struct iw_point iwp;
iwp_compat = (struct compat_iw_point *) &iwr->u.data;
iwp.pointer = compat_ptr(iwp_compat->pointer);
iwp.length = iwp_compat->length;
iwp.flags = iwp_compat->flags;
ret = ioctl_private_iw_point(&iwp, cmd, descr,
handler, dev, info, extra_size);
iwp_compat->pointer = ptr_to_compat(iwp.pointer);
iwp_compat->length = iwp.length;
iwp_compat->flags = iwp.flags;
}
/* Call commit handler if needed and defined */
if (ret == -EIWCOMMIT)
ret = call_commit_handler(dev);
return ret;
}
int compat_wext_handle_ioctl(struct net *net, unsigned int cmd,
unsigned long arg)
{
......@@ -1274,502 +1061,3 @@ int compat_wext_handle_ioctl(struct net *net, unsigned int cmd,
return ret;
}
#endif
static int __net_init wext_pernet_init(struct net *net)
{
skb_queue_head_init(&net->wext_nlevents);
return 0;
}
static void __net_exit wext_pernet_exit(struct net *net)
{
skb_queue_purge(&net->wext_nlevents);
}
static struct pernet_operations wext_pernet_ops = {
.init = wext_pernet_init,
.exit = wext_pernet_exit,
};
static int __init wireless_nlevent_init(void)
{
return register_pernet_subsys(&wext_pernet_ops);
}
subsys_initcall(wireless_nlevent_init);
/* Process events generated by the wireless layer or the driver. */
static void wireless_nlevent_process(struct work_struct *work)
{
struct sk_buff *skb;
struct net *net;
rtnl_lock();
for_each_net(net) {
while ((skb = skb_dequeue(&net->wext_nlevents)))
rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL,
GFP_KERNEL);
}
rtnl_unlock();
}
static DECLARE_WORK(wireless_nlevent_work, wireless_nlevent_process);
static struct nlmsghdr *rtnetlink_ifinfo_prep(struct net_device *dev,
struct sk_buff *skb)
{
struct ifinfomsg *r;
struct nlmsghdr *nlh;
nlh = nlmsg_put(skb, 0, 0, RTM_NEWLINK, sizeof(*r), 0);
if (!nlh)
return NULL;
r = nlmsg_data(nlh);
r->ifi_family = AF_UNSPEC;
r->__ifi_pad = 0;
r->ifi_type = dev->type;
r->ifi_index = dev->ifindex;
r->ifi_flags = dev_get_flags(dev);
r->ifi_change = 0; /* Wireless changes don't affect those flags */
NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
return nlh;
nla_put_failure:
nlmsg_cancel(skb, nlh);
return NULL;
}
/*
* Main event dispatcher. Called from other parts and drivers.
* Send the event on the appropriate channels.
* May be called from interrupt context.
*/
void wireless_send_event(struct net_device * dev,
unsigned int cmd,
union iwreq_data * wrqu,
const 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 */
int wrqu_off = 0; /* Offset in wrqu */
/* Don't "optimise" the following variable, it will crash */
unsigned cmd_index; /* *MUST* be unsigned */
struct sk_buff *skb;
struct nlmsghdr *nlh;
struct nlattr *nla;
#ifdef CONFIG_COMPAT
struct __compat_iw_event *compat_event;
struct compat_iw_point compat_wrqu;
struct sk_buff *compskb;
#endif
/*
* Nothing in the kernel sends scan events with data, be safe.
* This is necessary because we cannot fix up scan event data
* for compat, due to being contained in 'extra', but normally
* applications are required to retrieve the scan data anyway
* and no data is included in the event, this codifies that
* practice.
*/
if (WARN_ON(cmd == SIOCGIWSCAN && extra))
extra = NULL;
/* Get the description of the Event */
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;
}
/* 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;
/* Always at an offset in wrqu */
wrqu_off = IW_EV_POINT_OFF;
}
/* Total length of the event */
hdr_len = event_type_size[descr->header_type];
event_len = hdr_len + extra_len;
/*
* The problem for 64/32 bit.
*
* On 64-bit, a regular event is laid out as follows:
* | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
* | event.len | event.cmd | p a d d i n g |
* | wrqu data ... (with the correct size) |
*
* This padding exists because we manipulate event->u,
* and 'event' is not packed.
*
* An iw_point event is laid out like this instead:
* | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
* | event.len | event.cmd | p a d d i n g |
* | iwpnt.len | iwpnt.flg | p a d d i n g |
* | extra data ...
*
* The second padding exists because struct iw_point is extended,
* but this depends on the platform...
*
* On 32-bit, all the padding shouldn't be there.
*/
skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
if (!skb)
return;
/* Send via the RtNetlink event channel */
nlh = rtnetlink_ifinfo_prep(dev, skb);
if (WARN_ON(!nlh)) {
kfree_skb(skb);
return;
}
/* Add the wireless events in the netlink packet */
nla = nla_reserve(skb, IFLA_WIRELESS, event_len);
if (!nla) {
kfree_skb(skb);
return;
}
event = nla_data(nla);
/* Fill event - first clear to avoid data leaking */
memset(event, 0, hdr_len);
event->len = event_len;
event->cmd = cmd;
memcpy(&event->u, ((char *) wrqu) + wrqu_off, hdr_len - IW_EV_LCP_LEN);
if (extra_len)
memcpy(((char *) event) + hdr_len, extra, extra_len);
nlmsg_end(skb, nlh);
#ifdef CONFIG_COMPAT
hdr_len = compat_event_type_size[descr->header_type];
event_len = hdr_len + extra_len;
compskb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
if (!compskb) {
kfree_skb(skb);
return;
}
/* Send via the RtNetlink event channel */
nlh = rtnetlink_ifinfo_prep(dev, compskb);
if (WARN_ON(!nlh)) {
kfree_skb(skb);
kfree_skb(compskb);
return;
}
/* Add the wireless events in the netlink packet */
nla = nla_reserve(compskb, IFLA_WIRELESS, event_len);
if (!nla) {
kfree_skb(skb);
kfree_skb(compskb);
return;
}
compat_event = nla_data(nla);
compat_event->len = event_len;
compat_event->cmd = cmd;
if (descr->header_type == IW_HEADER_TYPE_POINT) {
compat_wrqu.length = wrqu->data.length;
compat_wrqu.flags = wrqu->data.flags;
memcpy(&compat_event->pointer,
((char *) &compat_wrqu) + IW_EV_COMPAT_POINT_OFF,
hdr_len - IW_EV_COMPAT_LCP_LEN);
if (extra_len)
memcpy(((char *) compat_event) + hdr_len,
extra, extra_len);
} else {
/* extra_len must be zero, so no if (extra) needed */
memcpy(&compat_event->pointer, wrqu,
hdr_len - IW_EV_COMPAT_LCP_LEN);
}
nlmsg_end(compskb, nlh);
skb_shinfo(skb)->frag_list = compskb;
#endif
skb_queue_tail(&dev_net(dev)->wext_nlevents, skb);
schedule_work(&wireless_nlevent_work);
}
EXPORT_SYMBOL(wireless_send_event);
/********************** 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 wireless_spy_update() and include struct iw_spy_data
* in its private part (and export it in net_device->wireless_data->spy_data).
* 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.
*/
/* ---------------------------------------------------------------- */
/*
* 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;
return NULL;
}
/*------------------------------------------------------------------*/
/*
* 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)
{
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.
* 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. */
smp_wmb();
/* 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);
}
/* Make sure above is updated before re-enabling */
smp_wmb();
/* Enable addresses */
spydata->spy_number = wrqu->data.length;
return 0;
}
EXPORT_SYMBOL(iw_handler_set_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)
{
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. */
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 &= ~IW_QUAL_ALL_UPDATED;
return 0;
}
EXPORT_SYMBOL(iw_handler_get_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)
{
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));
/* Clear flag */
memset(spydata->spy_thr_under, '\0', sizeof(spydata->spy_thr_under));
return 0;
}
EXPORT_SYMBOL(iw_handler_set_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)
{
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;
}
EXPORT_SYMBOL(iw_handler_get_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));
/* Send event to user space */
wireless_send_event(dev, SIOCGIWTHRSPY, &wrqu, (char *) &threshold);
}
/* ---------------------------------------------------------------- */
/*
* 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)
{
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;
/* Update all records that match */
for (i = 0; i < spydata->spy_number; i++)
if (!compare_ether_addr(address, spydata->spy_address[i])) {
memcpy(&(spydata->spy_stat[i]), wstats,
sizeof(struct iw_quality));
match = i;
}
/* 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);
}
}
}
}
EXPORT_SYMBOL(wireless_spy_update);
net/wireless/wext-priv.c 0 → 100644
View file @ 3d23e349
/*
* This file implement the Wireless Extensions priv API.
*
* Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com>
* Copyright (c) 1997-2007 Jean Tourrilhes, All Rights Reserved.
* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
*
* (As all part of the Linux kernel, this file is GPL)
*/
#include <linux/wireless.h>
#include <linux/netdevice.h>
#include <net/iw_handler.h>
#include <net/wext.h>
int iw_handler_get_private(struct net_device * dev,
struct iw_request_info * info,
union iwreq_data * wrqu,
char * extra)
{
/* 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 if there is enough buffer up there */
if (wrqu->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... */
wrqu->data.length = dev->wireless_handlers->num_private_args;
return -E2BIG;
}
/* Set the number of available ioctls. */
wrqu->data.length = dev->wireless_handlers->num_private_args;
/* Copy structure to the user buffer. */
memcpy(extra, dev->wireless_handlers->private_args,
sizeof(struct iw_priv_args) * wrqu->data.length);
return 0;
}
/* Size (in bytes) of the various private data types */
static const char iw_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 */
};
static int get_priv_size(__u16 args)
{
int num = args & IW_PRIV_SIZE_MASK;
int type = (args & IW_PRIV_TYPE_MASK) >> 12;
return num * iw_priv_type_size[type];
}
static int adjust_priv_size(__u16 args, struct iw_point *iwp)
{
int num = iwp->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];
}
/*
* 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 int get_priv_descr_and_size(struct net_device *dev, unsigned int cmd,
const struct iw_priv_args **descrp)
{
const struct iw_priv_args *descr;
int i, extra_size;
descr = NULL;
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;
}
}
extra_size = 0;
if (descr) {
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 get 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;
}
}
*descrp = descr;
return extra_size;
}
static int ioctl_private_iw_point(struct iw_point *iwp, unsigned int cmd,
const struct iw_priv_args *descr,
iw_handler handler, struct net_device *dev,
struct iw_request_info *info, int extra_size)
{
char *extra;
int err;
/* Check what user space is giving us */
if (IW_IS_SET(cmd)) {
if (!iwp->pointer && iwp->length != 0)
return -EFAULT;
if (iwp->length > (descr->set_args & IW_PRIV_SIZE_MASK))
return -E2BIG;
} else if (!iwp->pointer)
return -EFAULT;
extra = kmalloc(extra_size, GFP_KERNEL);
if (!extra)
return -ENOMEM;
/* If it is a SET, get all the extra data in here */
if (IW_IS_SET(cmd) && (iwp->length != 0)) {
if (copy_from_user(extra, iwp->pointer, extra_size)) {
err = -EFAULT;
goto out;
}
}
/* Call the handler */
err = handler(dev, info, (union iwreq_data *) iwp, extra);
/* If we have something to return to the user */
if (!err && 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, iwp);
if (copy_to_user(iwp->pointer, extra, extra_size))
err = -EFAULT;
}
out:
kfree(extra);
return err;
}
int ioctl_private_call(struct net_device *dev, struct iwreq *iwr,
unsigned int cmd, struct iw_request_info *info,
iw_handler handler)
{
int extra_size = 0, ret = -EINVAL;
const struct iw_priv_args *descr;
extra_size = get_priv_descr_and_size(dev, cmd, &descr);
/* 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 {
ret = ioctl_private_iw_point(&iwr->u.data, cmd, descr,
handler, dev, info, extra_size);
}
/* Call commit handler if needed and defined */
if (ret == -EIWCOMMIT)
ret = call_commit_handler(dev);
return ret;
}
#ifdef CONFIG_COMPAT
int compat_private_call(struct net_device *dev, struct iwreq *iwr,
unsigned int cmd, struct iw_request_info *info,
iw_handler handler)
{
const struct iw_priv_args *descr;
int ret, extra_size;
extra_size = get_priv_descr_and_size(dev, cmd, &descr);
/* 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 {
struct compat_iw_point *iwp_compat;
struct iw_point iwp;
iwp_compat = (struct compat_iw_point *) &iwr->u.data;
iwp.pointer = compat_ptr(iwp_compat->pointer);
iwp.length = iwp_compat->length;
iwp.flags = iwp_compat->flags;
ret = ioctl_private_iw_point(&iwp, cmd, descr,
handler, dev, info, extra_size);
iwp_compat->pointer = ptr_to_compat(iwp.pointer);
iwp_compat->length = iwp.length;
iwp_compat->flags = iwp.flags;
}
/* Call commit handler if needed and defined */
if (ret == -EIWCOMMIT)
ret = call_commit_handler(dev);
return ret;
}
#endif
net/wireless/wext-proc.c 0 → 100644
View file @ 3d23e349
/*
* This file implement the Wireless Extensions proc API.
*
* Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com>
* Copyright (c) 1997-2007 Jean Tourrilhes, All Rights Reserved.
*
* (As all part of the Linux kernel, this file is GPL)
*/
/*
* 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".
*/
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/wireless.h>
#include <linux/netdevice.h>
#include <linux/rtnetlink.h>
#include <net/iw_handler.h>
#include <net/wext.h>
static void wireless_seq_printf_stats(struct seq_file *seq,
struct net_device *dev)
{
/* Get stats from the driver */
struct iw_statistics *stats = get_wireless_stats(dev);
static struct iw_statistics nullstats = {};
/* show device if it's wireless regardless of current stats */
if (!stats) {
#ifdef CONFIG_WIRELESS_EXT
if (dev->wireless_handlers)
stats = &nullstats;
#endif
#ifdef CONFIG_CFG80211
if (dev->ieee80211_ptr)
stats = &nullstats;
#endif
}
if (stats) {
seq_printf(seq, "%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 & IW_QUAL_QUAL_UPDATED
? '.' : ' ',
((__s32) stats->qual.level) -
((stats->qual.updated & IW_QUAL_DBM) ? 0x100 : 0),
stats->qual.updated & IW_QUAL_LEVEL_UPDATED
? '.' : ' ',
((__s32) stats->qual.noise) -
((stats->qual.updated & IW_QUAL_DBM) ? 0x100 : 0),
stats->qual.updated & IW_QUAL_NOISE_UPDATED
? '.' : ' ',
stats->discard.nwid, stats->discard.code,
stats->discard.fragment, stats->discard.retries,
stats->discard.misc, stats->miss.beacon);
if (stats != &nullstats)
stats->qual.updated &= ~IW_QUAL_ALL_UPDATED;
}
}
/* ---------------------------------------------------------------- */
/*
* Print info for /proc/net/wireless (print all entries)
*/
static int wireless_dev_seq_show(struct seq_file *seq, void *v)
{
might_sleep();
if (v == SEQ_START_TOKEN)
seq_printf(seq, "Inter-| sta-| Quality | Discarded "
"packets | Missed | WE\n"
" face | tus | link level noise | nwid "
"crypt frag retry misc | beacon | %d\n",
WIRELESS_EXT);
else
wireless_seq_printf_stats(seq, v);
return 0;
}
static void *wireless_dev_seq_start(struct seq_file *seq, loff_t *pos)
{
struct net *net = seq_file_net(seq);
loff_t off;
struct net_device *dev;
rtnl_lock();
if (!*pos)
return SEQ_START_TOKEN;
off = 1;
for_each_netdev(net, dev)
if (off++ == *pos)
return dev;
return NULL;
}
static void *wireless_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
struct net *net = seq_file_net(seq);
++*pos;
return v == SEQ_START_TOKEN ?
first_net_device(net) : next_net_device(v);
}
static void wireless_dev_seq_stop(struct seq_file *seq, void *v)
{
rtnl_unlock();
}
static const struct seq_operations wireless_seq_ops = {
.start = wireless_dev_seq_start,
.next = wireless_dev_seq_next,
.stop = wireless_dev_seq_stop,
.show = wireless_dev_seq_show,
};
static int seq_open_wireless(struct inode *inode, struct file *file)
{
return seq_open_net(inode, file, &wireless_seq_ops,
sizeof(struct seq_net_private));
}
static const struct file_operations wireless_seq_fops = {
.owner = THIS_MODULE,
.open = seq_open_wireless,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_net,
};
int wext_proc_init(struct net *net)
{
/* Create /proc/net/wireless entry */
if (!proc_net_fops_create(net, "wireless", S_IRUGO, &wireless_seq_fops))
return -ENOMEM;
return 0;
}
void wext_proc_exit(struct net *net)
{
proc_net_remove(net, "wireless");
}
net/wireless/wext-spy.c 0 → 100644
View file @ 3d23e349
/*
* This file implement the Wireless Extensions spy API.
*
* Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com>
* Copyright (c) 1997-2007 Jean Tourrilhes, All Rights Reserved.
*
* (As all part of the Linux kernel, this file is GPL)
*/
#include <linux/wireless.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <net/iw_handler.h>
#include <net/arp.h>
#include <net/wext.h>
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;
return NULL;
}
int iw_handler_set_spy(struct net_device * dev,
struct iw_request_info * info,
union iwreq_data * wrqu,
char * extra)
{
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.
* 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. */
smp_wmb();
/* 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);
}
/* Make sure above is updated before re-enabling */
smp_wmb();
/* Enable addresses */
spydata->spy_number = wrqu->data.length;
return 0;
}
EXPORT_SYMBOL(iw_handler_set_spy);
int iw_handler_get_spy(struct net_device * dev,
struct iw_request_info * info,
union iwreq_data * wrqu,
char * extra)
{
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. */
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 &= ~IW_QUAL_ALL_UPDATED;
return 0;
}
EXPORT_SYMBOL(iw_handler_get_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)
{
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));
/* Clear flag */
memset(spydata->spy_thr_under, '\0', sizeof(spydata->spy_thr_under));
return 0;
}
EXPORT_SYMBOL(iw_handler_set_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)
{
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;
}
EXPORT_SYMBOL(iw_handler_get_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));
/* Send event to user space */
wireless_send_event(dev, SIOCGIWTHRSPY, &wrqu, (char *) &threshold);
}
/* ---------------------------------------------------------------- */
/*
* 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)
{
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;
/* Update all records that match */
for (i = 0; i < spydata->spy_number; i++)
if (!compare_ether_addr(address, spydata->spy_address[i])) {
memcpy(&(spydata->spy_stat[i]), wstats,
sizeof(struct iw_quality));
match = i;
}
/* 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);
}
}
}
}
EXPORT_SYMBOL(wireless_spy_update);
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