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0ce12026d6
MAX_JIFFY_OFFSET has no meaning when calculating the elapsed jiffies, as jiffies run out until ULONG_MAX. This miscalculation results in erroneous values in case of a wrap-around. Signed-off-by: Eliad Peller <eliad@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
471 lines
14 KiB
C
471 lines
14 KiB
C
/*
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* Wireless configuration interface internals.
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*
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* Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
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*/
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#ifndef __NET_WIRELESS_CORE_H
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#define __NET_WIRELESS_CORE_H
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#include <linux/list.h>
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#include <linux/netdevice.h>
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#include <linux/rbtree.h>
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#include <linux/debugfs.h>
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#include <linux/rfkill.h>
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#include <linux/workqueue.h>
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#include <linux/rtnetlink.h>
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#include <net/genetlink.h>
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#include <net/cfg80211.h>
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#include "reg.h"
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#define WIPHY_IDX_INVALID -1
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struct cfg80211_registered_device {
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const struct cfg80211_ops *ops;
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struct list_head list;
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/* rfkill support */
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struct rfkill_ops rfkill_ops;
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struct rfkill *rfkill;
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struct work_struct rfkill_sync;
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/* ISO / IEC 3166 alpha2 for which this device is receiving
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* country IEs on, this can help disregard country IEs from APs
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* on the same alpha2 quickly. The alpha2 may differ from
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* cfg80211_regdomain's alpha2 when an intersection has occurred.
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* If the AP is reconfigured this can also be used to tell us if
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* the country on the country IE changed. */
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char country_ie_alpha2[2];
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/* If a Country IE has been received this tells us the environment
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* which its telling us its in. This defaults to ENVIRON_ANY */
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enum environment_cap env;
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/* wiphy index, internal only */
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int wiphy_idx;
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/* associated wireless interfaces, protected by rtnl or RCU */
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struct list_head wdev_list;
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int devlist_generation, wdev_id;
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int opencount; /* also protected by devlist_mtx */
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wait_queue_head_t dev_wait;
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struct list_head beacon_registrations;
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spinlock_t beacon_registrations_lock;
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/* protected by RTNL only */
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int num_running_ifaces;
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int num_running_monitor_ifaces;
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/* BSSes/scanning */
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spinlock_t bss_lock;
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struct list_head bss_list;
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struct rb_root bss_tree;
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u32 bss_generation;
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struct cfg80211_scan_request *scan_req; /* protected by RTNL */
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struct sk_buff *scan_msg;
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struct cfg80211_sched_scan_request *sched_scan_req;
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unsigned long suspend_at;
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struct work_struct scan_done_wk;
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struct work_struct sched_scan_results_wk;
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struct genl_info *cur_cmd_info;
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struct work_struct conn_work;
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struct work_struct event_work;
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struct delayed_work dfs_update_channels_wk;
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/* netlink port which started critical protocol (0 means not started) */
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u32 crit_proto_nlportid;
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struct cfg80211_coalesce *coalesce;
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spinlock_t destroy_list_lock;
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struct list_head destroy_list;
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struct work_struct destroy_work;
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/* must be last because of the way we do wiphy_priv(),
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* and it should at least be aligned to NETDEV_ALIGN */
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struct wiphy wiphy __aligned(NETDEV_ALIGN);
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};
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static inline
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struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy)
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{
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BUG_ON(!wiphy);
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return container_of(wiphy, struct cfg80211_registered_device, wiphy);
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}
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static inline void
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cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
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{
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#ifdef CONFIG_PM
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int i;
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if (!rdev->wiphy.wowlan_config)
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return;
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for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
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kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
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kfree(rdev->wiphy.wowlan_config->patterns);
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if (rdev->wiphy.wowlan_config->tcp &&
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rdev->wiphy.wowlan_config->tcp->sock)
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sock_release(rdev->wiphy.wowlan_config->tcp->sock);
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kfree(rdev->wiphy.wowlan_config->tcp);
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kfree(rdev->wiphy.wowlan_config);
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#endif
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}
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extern struct workqueue_struct *cfg80211_wq;
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extern struct list_head cfg80211_rdev_list;
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extern int cfg80211_rdev_list_generation;
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struct cfg80211_internal_bss {
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struct list_head list;
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struct list_head hidden_list;
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struct rb_node rbn;
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unsigned long ts;
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unsigned long refcount;
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atomic_t hold;
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/* must be last because of priv member */
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struct cfg80211_bss pub;
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};
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static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
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{
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return container_of(pub, struct cfg80211_internal_bss, pub);
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}
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static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
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{
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atomic_inc(&bss->hold);
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}
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static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
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{
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int r = atomic_dec_return(&bss->hold);
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WARN_ON(r < 0);
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}
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struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
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int get_wiphy_idx(struct wiphy *wiphy);
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struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
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int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
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struct net *net);
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static inline void wdev_lock(struct wireless_dev *wdev)
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__acquires(wdev)
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{
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mutex_lock(&wdev->mtx);
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__acquire(wdev->mtx);
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}
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static inline void wdev_unlock(struct wireless_dev *wdev)
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__releases(wdev)
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{
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__release(wdev->mtx);
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mutex_unlock(&wdev->mtx);
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}
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#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
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static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
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{
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ASSERT_RTNL();
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return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
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rdev->num_running_ifaces > 0;
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}
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enum cfg80211_event_type {
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EVENT_CONNECT_RESULT,
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EVENT_ROAMED,
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EVENT_DISCONNECTED,
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EVENT_IBSS_JOINED,
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EVENT_STOPPED,
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};
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struct cfg80211_event {
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struct list_head list;
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enum cfg80211_event_type type;
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union {
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struct {
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u8 bssid[ETH_ALEN];
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const u8 *req_ie;
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const u8 *resp_ie;
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size_t req_ie_len;
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size_t resp_ie_len;
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u16 status;
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} cr;
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struct {
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const u8 *req_ie;
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const u8 *resp_ie;
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size_t req_ie_len;
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size_t resp_ie_len;
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struct cfg80211_bss *bss;
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} rm;
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struct {
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const u8 *ie;
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size_t ie_len;
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u16 reason;
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} dc;
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struct {
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u8 bssid[ETH_ALEN];
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struct ieee80211_channel *channel;
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} ij;
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};
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};
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struct cfg80211_cached_keys {
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struct key_params params[6];
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u8 data[6][WLAN_MAX_KEY_LEN];
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int def, defmgmt;
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};
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enum cfg80211_chan_mode {
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CHAN_MODE_UNDEFINED,
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CHAN_MODE_SHARED,
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CHAN_MODE_EXCLUSIVE,
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};
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struct cfg80211_beacon_registration {
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struct list_head list;
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u32 nlportid;
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};
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struct cfg80211_iface_destroy {
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struct list_head list;
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u32 nlportid;
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};
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void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
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/* free object */
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void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
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int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
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char *newname);
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void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
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void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
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void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
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unsigned long age_secs);
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/* IBSS */
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int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct cfg80211_ibss_params *params,
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struct cfg80211_cached_keys *connkeys);
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void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
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int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
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struct net_device *dev, bool nowext);
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int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
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struct net_device *dev, bool nowext);
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void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
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struct ieee80211_channel *channel);
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int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
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struct wireless_dev *wdev);
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/* mesh */
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extern const struct mesh_config default_mesh_config;
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extern const struct mesh_setup default_mesh_setup;
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int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct mesh_setup *setup,
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const struct mesh_config *conf);
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int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct mesh_setup *setup,
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const struct mesh_config *conf);
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int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
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struct net_device *dev);
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int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
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struct net_device *dev);
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int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
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struct wireless_dev *wdev,
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struct cfg80211_chan_def *chandef);
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/* AP */
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int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
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struct net_device *dev, bool notify);
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int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
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struct net_device *dev, bool notify);
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/* MLME */
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int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct ieee80211_channel *chan,
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enum nl80211_auth_type auth_type,
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const u8 *bssid,
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const u8 *ssid, int ssid_len,
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const u8 *ie, int ie_len,
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const u8 *key, int key_len, int key_idx,
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const u8 *sae_data, int sae_data_len);
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int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct ieee80211_channel *chan,
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const u8 *bssid,
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const u8 *ssid, int ssid_len,
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struct cfg80211_assoc_request *req);
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int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
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struct net_device *dev, const u8 *bssid,
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const u8 *ie, int ie_len, u16 reason,
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bool local_state_change);
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int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
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struct net_device *dev, const u8 *bssid,
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const u8 *ie, int ie_len, u16 reason,
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bool local_state_change);
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void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
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struct net_device *dev);
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int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
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u16 frame_type, const u8 *match_data,
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int match_len);
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void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
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void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
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int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
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struct wireless_dev *wdev,
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struct cfg80211_mgmt_tx_params *params,
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u64 *cookie);
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void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
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const struct ieee80211_ht_cap *ht_capa_mask);
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void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
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const struct ieee80211_vht_cap *vht_capa_mask);
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/* SME events */
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int cfg80211_connect(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct cfg80211_connect_params *connect,
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struct cfg80211_cached_keys *connkeys,
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const u8 *prev_bssid);
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void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
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const u8 *req_ie, size_t req_ie_len,
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const u8 *resp_ie, size_t resp_ie_len,
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u16 status, bool wextev,
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struct cfg80211_bss *bss);
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void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
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size_t ie_len, u16 reason, bool from_ap);
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int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
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struct net_device *dev, u16 reason,
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bool wextev);
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void __cfg80211_roamed(struct wireless_dev *wdev,
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struct cfg80211_bss *bss,
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const u8 *req_ie, size_t req_ie_len,
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const u8 *resp_ie, size_t resp_ie_len);
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int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
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struct wireless_dev *wdev);
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/* SME implementation */
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void cfg80211_conn_work(struct work_struct *work);
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void cfg80211_sme_scan_done(struct net_device *dev);
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bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
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void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
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void cfg80211_sme_disassoc(struct wireless_dev *wdev);
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void cfg80211_sme_deauth(struct wireless_dev *wdev);
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void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
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void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
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/* internal helpers */
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bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
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int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
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struct key_params *params, int key_idx,
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bool pairwise, const u8 *mac_addr);
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void __cfg80211_scan_done(struct work_struct *wk);
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void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
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bool send_message);
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void __cfg80211_sched_scan_results(struct work_struct *wk);
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int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
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bool driver_initiated);
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void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
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int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
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struct net_device *dev, enum nl80211_iftype ntype,
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u32 *flags, struct vif_params *params);
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void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
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void cfg80211_process_wdev_events(struct wireless_dev *wdev);
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int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
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struct wireless_dev *wdev,
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enum nl80211_iftype iftype,
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struct ieee80211_channel *chan,
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enum cfg80211_chan_mode chanmode,
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u8 radar_detect);
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/**
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* cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
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* @wiphy: the wiphy to validate against
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* @chandef: the channel definition to check
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*
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* Checks if chandef is usable and we can/need start CAC on such channel.
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*
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* Return: Return true if all channels available and at least
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* one channel require CAC (NL80211_DFS_USABLE)
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*/
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bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
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const struct cfg80211_chan_def *chandef);
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void cfg80211_set_dfs_state(struct wiphy *wiphy,
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const struct cfg80211_chan_def *chandef,
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enum nl80211_dfs_state dfs_state);
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void cfg80211_dfs_channels_update_work(struct work_struct *work);
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unsigned int
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cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
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const struct cfg80211_chan_def *chandef);
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static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
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{
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unsigned long end = jiffies;
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if (end >= start)
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return jiffies_to_msecs(end - start);
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return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
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}
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void
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cfg80211_get_chan_state(struct wireless_dev *wdev,
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struct ieee80211_channel **chan,
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enum cfg80211_chan_mode *chanmode,
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u8 *radar_detect);
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int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
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struct cfg80211_chan_def *chandef);
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int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
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const u8 *rates, unsigned int n_rates,
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u32 *mask);
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int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
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u32 beacon_int);
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void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
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enum nl80211_iftype iftype, int num);
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void __cfg80211_leave(struct cfg80211_registered_device *rdev,
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struct wireless_dev *wdev);
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void cfg80211_leave(struct cfg80211_registered_device *rdev,
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struct wireless_dev *wdev);
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void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
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struct wireless_dev *wdev);
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#define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
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#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
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#define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
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#else
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/*
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* Trick to enable using it as a condition,
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* and also not give a warning when it's
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* not used that way.
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*/
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#define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; })
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#endif
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#endif /* __NET_WIRELESS_CORE_H */
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