diff options
Diffstat (limited to 'net/wireless')
| -rw-r--r-- | net/wireless/Kconfig | 50 | ||||
| -rw-r--r-- | net/wireless/Makefile | 8 | ||||
| -rw-r--r-- | net/wireless/core.c | 14 | ||||
| -rw-r--r-- | net/wireless/ibss.c | 10 | ||||
| -rw-r--r-- | net/wireless/mlme.c | 2 | ||||
| -rw-r--r-- | net/wireless/nl80211.c | 4 | ||||
| -rw-r--r-- | net/wireless/scan.c | 6 | ||||
| -rw-r--r-- | net/wireless/sme.c | 12 | ||||
| -rw-r--r-- | net/wireless/wext-core.c (renamed from net/wireless/wext.c) | 1456 | ||||
| -rw-r--r-- | net/wireless/wext-priv.c | 248 | ||||
| -rw-r--r-- | net/wireless/wext-proc.c | 155 | ||||
| -rw-r--r-- | net/wireless/wext-spy.c | 231 |
12 files changed, 1072 insertions, 1124 deletions
diff --git a/net/wireless/Kconfig b/net/wireless/Kconfig index abf7ca3..614bdce 100644 --- a/net/wireless/Kconfig +++ b/net/wireless/Kconfig @@ -1,3 +1,21 @@ +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 diff --git a/net/wireless/Makefile b/net/wireless/Makefile index 3ecaa91..c814150 100644 --- a/net/wireless/Makefile +++ b/net/wireless/Makefile @@ -1,13 +1,17 @@ -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__ diff --git a/net/wireless/core.c b/net/wireless/core.c index e6f02e9..eb0bb24 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -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 } diff --git a/net/wireless/ibss.c b/net/wireless/ibss.c index c883389..39b6d92 100644 --- a/net/wireless/ibss.c +++ b/net/wireless/ibss.c @@ -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) { diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c index 79d2eec..ceb2c14 100644 --- a/net/wireless/mlme.c +++ b/net/wireless/mlme.c @@ -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); diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index e0ecc9f..14004e2 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -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; diff --git a/net/wireless/scan.c b/net/wireless/scan.c index e5f92ee..2e8c515 100644 --- a/net/wireless/scan.c +++ b/net/wireless/scan.c @@ -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) diff --git a/net/wireless/sme.c b/net/wireless/sme.c index 93c3ed3..d362415 100644 --- a/net/wireless/sme.c +++ b/net/wireless/sme.c @@ -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); diff --git a/net/wireless/wext.c b/net/wireless/wext-core.c index 60fe5776..a4e5ddc 100644 --- a/net/wireless/wext.c +++ b/net/wireless/wext-core.c @@ -1,112 +1,28 @@ /* - * 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 */ @@ -433,323 +337,346 @@ 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]; +/* IW event code */ - /* Not found */ - return NULL; -} - -/* ---------------------------------------------------------------- */ -/* - * Get statistics out of the driver - */ -struct iw_statistics *get_wireless_stats(struct net_device *dev) +static int __net_init wext_pernet_init(struct net *net) { - /* 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; + skb_queue_head_init(&net->wext_nlevents); + return 0; } -/* ---------------------------------------------------------------- */ -/* - * 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) +static void __net_exit wext_pernet_exit(struct net *net) { - 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 */ + skb_queue_purge(&net->wext_nlevents); } -/* ---------------------------------------------------------------- */ -/* - * 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; +static struct pernet_operations wext_pernet_ops = { + .init = wext_pernet_init, + .exit = wext_pernet_exit, +}; - return num * iw_priv_type_size[type]; +static int __init wireless_nlevent_init(void) +{ + return register_pernet_subsys(&wext_pernet_ops); } -/* ---------------------------------------------------------------- */ -/* - * Re-calculate the size of private arguments - */ -static int adjust_priv_size(__u16 args, struct iw_point *iwp) +subsys_initcall(wireless_nlevent_init); + +/* Process events generated by the wireless layer or the driver. */ +static void wireless_nlevent_process(struct work_struct *work) { - int num = iwp->length; - int max = args & IW_PRIV_SIZE_MASK; - int type = (args & IW_PRIV_TYPE_MASK) >> 12; + struct sk_buff *skb; + struct net *net; - /* Make sure the driver doesn't goof up */ - if (max < num) - num = max; + rtnl_lock(); + + for_each_net(net) { + while ((skb = skb_dequeue(&net->wext_nlevents))) + rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, + GFP_KERNEL); + } - return num * iw_priv_type_size[type]; + rtnl_unlock(); } -/* ---------------------------------------------------------------- */ -/* - * 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 DECLARE_WORK(wireless_nlevent_work, wireless_nlevent_process); + +static struct nlmsghdr *rtnetlink_ifinfo_prep(struct net_device *dev, + struct sk_buff *skb) { - /* Get stats from the driver */ - struct iw_statistics *stats; + struct ifinfomsg *r; + struct nlmsghdr *nlh; - 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); + nlh = nlmsg_put(skb, 0, 0, RTM_NEWLINK, sizeof(*r), 0); + if (!nlh) + return NULL; - /* 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; + 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; } -/* ---------------------------------------------------------------- */ + /* - * Standard Wireless Handler : get iwpriv definitions - * Export the driver private handler definition - * They will be picked up by tools like iwpriv... + * Main event dispatcher. Called from other parts and drivers. + * Send the event on the appropriate channels. + * May be called from interrupt context. */ -static int iw_handler_get_private(struct net_device * dev, - struct iw_request_info * info, - union iwreq_data * wrqu, - char * extra) +void wireless_send_event(struct net_device * dev, + unsigned int cmd, + union iwreq_data * wrqu, + const 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; + 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 - /* 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; + /* + * 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; } - /* Set the number of available ioctls. */ - wrqu->data.length = dev->wireless_handlers->num_private_args; + /* 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; + } - /* Copy structure to the user buffer. */ - memcpy(extra, dev->wireless_handlers->private_args, - sizeof(struct iw_priv_args) * wrqu->data.length); + /* Total length of the event */ + hdr_len = event_type_size[descr->header_type]; + event_len = hdr_len + extra_len; - return 0; -} + /* + * 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; -/******************** /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". - */ + /* Send via the RtNetlink event channel */ + nlh = rtnetlink_ifinfo_prep(dev, skb); + if (WARN_ON(!nlh)) { + kfree_skb(skb); + return; + } -#ifdef CONFIG_PROC_FS + /* 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); -/* ---------------------------------------------------------------- */ -/* - * Print one entry (line) of /proc/net/wireless - */ -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 = {}; + /* 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); - /* show device if it's wireless regardless of current stats */ - if (!stats && dev->wireless_handlers) - stats = &nullstats; + nlmsg_end(skb, nlh); +#ifdef CONFIG_COMPAT + hdr_len = compat_event_type_size[descr->header_type]; + event_len = hdr_len + extra_len; - 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; + compskb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); + if (!compskb) { + kfree_skb(skb); + return; } -} -/* ---------------------------------------------------------------- */ -/* - * 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; + /* 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 */ -static void *wireless_dev_seq_start(struct seq_file *seq, loff_t *pos) +struct iw_statistics *get_wireless_stats(struct net_device *dev) { - struct net *net = seq_file_net(seq); - loff_t off; - 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 - rtnl_lock(); - if (!*pos) - return SEQ_START_TOKEN; +#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 - off = 1; - for_each_netdev(net, dev) - if (off++ == *pos) - return dev; + /* not found */ return NULL; } -static void *wireless_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) +static int iw_handler_get_iwstats(struct net_device * dev, + struct iw_request_info * info, + union iwreq_data * wrqu, + char * extra) { - struct net *net = seq_file_net(seq); + /* Get stats from the driver */ + struct iw_statistics *stats; - ++*pos; + 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); - return v == SEQ_START_TOKEN ? - first_net_device(net) : next_net_device(v); + /* 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 void wireless_dev_seq_stop(struct seq_file *seq, void *v) +static iw_handler get_handler(struct net_device *dev, unsigned int cmd) { - 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, -}; + /* Don't "optimise" the following variable, it will crash */ + unsigned int index; /* *MUST* be unsigned */ + const struct iw_handler_def *handlers = NULL; -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)); -} +#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 -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, -}; + if (!handlers) + 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; + /* Try as a standard command */ + index = cmd - SIOCIWFIRST; + if (index < handlers->num_standard) + return handlers->standard[index]; - return 0; -} +#ifdef CONFIG_WEXT_PRIV + /* Try as a private command */ + index = cmd - SIOCIWFIRSTPRIV; + if (index < handlers->num_private) + return handlers->private[index]; +#endif -void wext_proc_exit(struct net *net) -{ - proc_net_remove(net, "wireless"); + /* Not found */ + 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. - */ - -/* ---------------------------------------------------------------- */ 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, @@ -893,188 +820,39 @@ out: } /* - * 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; -} - -/* ---------------------------------------------------------------- */ -/* - * 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. + * 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. * - * 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). + * 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 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 call_commit_handler(struct net_device *dev) { - 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); diff --git a/net/wireless/wext-priv.c b/net/wireless/wext-priv.c new file mode 100644 index 0000000..a3c2277 --- /dev/null +++ b/net/wireless/wext-priv.c @@ -0,0 +1,248 @@ +/* + * 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 diff --git a/net/wireless/wext-proc.c b/net/wireless/wext-proc.c new file mode 100644 index 0000000..273a7f7 --- /dev/null +++ b/net/wireless/wext-proc.c @@ -0,0 +1,155 @@ +/* + * 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"); +} diff --git a/net/wireless/wext-spy.c b/net/wireless/wext-spy.c new file mode 100644 index 0000000..6dcfe65 --- /dev/null +++ b/net/wireless/wext-spy.c @@ -0,0 +1,231 @@ +/* + * 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); |