bdcbd8e0e3
There are a few things that make the logging and debugging in mac80211 less useful than it should be right now: * a lot of messages should be pr_info, not pr_debug * wholesale use of pr_debug makes it require *both* Kconfig and dynamic configuration * there are still a lot of ifdefs * the style is very inconsistent, sometimes the sdata->name is printed in front Clean up everything, introducing new macros and separating out the station MLME debugging into a new Kconfig symbol. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
699 lines
18 KiB
C
699 lines
18 KiB
C
/*
|
|
* Copyright 2002-2005, Instant802 Networks, Inc.
|
|
* Copyright 2005-2006, Devicescape Software, Inc.
|
|
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
|
|
* Copyright 2007-2008 Johannes Berg <johannes@sipsolutions.net>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/if_ether.h>
|
|
#include <linux/etherdevice.h>
|
|
#include <linux/list.h>
|
|
#include <linux/rcupdate.h>
|
|
#include <linux/rtnetlink.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/export.h>
|
|
#include <net/mac80211.h>
|
|
#include <asm/unaligned.h>
|
|
#include "ieee80211_i.h"
|
|
#include "driver-ops.h"
|
|
#include "debugfs_key.h"
|
|
#include "aes_ccm.h"
|
|
#include "aes_cmac.h"
|
|
|
|
|
|
/**
|
|
* DOC: Key handling basics
|
|
*
|
|
* Key handling in mac80211 is done based on per-interface (sub_if_data)
|
|
* keys and per-station keys. Since each station belongs to an interface,
|
|
* each station key also belongs to that interface.
|
|
*
|
|
* Hardware acceleration is done on a best-effort basis for algorithms
|
|
* that are implemented in software, for each key the hardware is asked
|
|
* to enable that key for offloading but if it cannot do that the key is
|
|
* simply kept for software encryption (unless it is for an algorithm
|
|
* that isn't implemented in software).
|
|
* There is currently no way of knowing whether a key is handled in SW
|
|
* or HW except by looking into debugfs.
|
|
*
|
|
* All key management is internally protected by a mutex. Within all
|
|
* other parts of mac80211, key references are, just as STA structure
|
|
* references, protected by RCU. Note, however, that some things are
|
|
* unprotected, namely the key->sta dereferences within the hardware
|
|
* acceleration functions. This means that sta_info_destroy() must
|
|
* remove the key which waits for an RCU grace period.
|
|
*/
|
|
|
|
static const u8 bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
|
|
|
|
static void assert_key_lock(struct ieee80211_local *local)
|
|
{
|
|
lockdep_assert_held(&local->key_mtx);
|
|
}
|
|
|
|
static void increment_tailroom_need_count(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
/*
|
|
* When this count is zero, SKB resizing for allocating tailroom
|
|
* for IV or MMIC is skipped. But, this check has created two race
|
|
* cases in xmit path while transiting from zero count to one:
|
|
*
|
|
* 1. SKB resize was skipped because no key was added but just before
|
|
* the xmit key is added and SW encryption kicks off.
|
|
*
|
|
* 2. SKB resize was skipped because all the keys were hw planted but
|
|
* just before xmit one of the key is deleted and SW encryption kicks
|
|
* off.
|
|
*
|
|
* In both the above case SW encryption will find not enough space for
|
|
* tailroom and exits with WARN_ON. (See WARN_ONs at wpa.c)
|
|
*
|
|
* Solution has been explained at
|
|
* http://mid.gmane.org/1308590980.4322.19.camel@jlt3.sipsolutions.net
|
|
*/
|
|
|
|
if (!sdata->crypto_tx_tailroom_needed_cnt++) {
|
|
/*
|
|
* Flush all XMIT packets currently using HW encryption or no
|
|
* encryption at all if the count transition is from 0 -> 1.
|
|
*/
|
|
synchronize_net();
|
|
}
|
|
}
|
|
|
|
static int ieee80211_key_enable_hw_accel(struct ieee80211_key *key)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata;
|
|
struct sta_info *sta;
|
|
int ret;
|
|
|
|
might_sleep();
|
|
|
|
if (!key->local->ops->set_key)
|
|
goto out_unsupported;
|
|
|
|
assert_key_lock(key->local);
|
|
|
|
sta = key->sta;
|
|
|
|
/*
|
|
* If this is a per-STA GTK, check if it
|
|
* is supported; if not, return.
|
|
*/
|
|
if (sta && !(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE) &&
|
|
!(key->local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK))
|
|
goto out_unsupported;
|
|
|
|
if (sta && !sta->uploaded)
|
|
goto out_unsupported;
|
|
|
|
sdata = key->sdata;
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
|
|
/*
|
|
* The driver doesn't know anything about VLAN interfaces.
|
|
* Hence, don't send GTKs for VLAN interfaces to the driver.
|
|
*/
|
|
if (!(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE))
|
|
goto out_unsupported;
|
|
}
|
|
|
|
ret = drv_set_key(key->local, SET_KEY, sdata,
|
|
sta ? &sta->sta : NULL, &key->conf);
|
|
|
|
if (!ret) {
|
|
key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE;
|
|
|
|
if (!((key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC) ||
|
|
(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV) ||
|
|
(key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)))
|
|
sdata->crypto_tx_tailroom_needed_cnt--;
|
|
|
|
WARN_ON((key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE) &&
|
|
(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV));
|
|
|
|
return 0;
|
|
}
|
|
|
|
if (ret != -ENOSPC && ret != -EOPNOTSUPP)
|
|
sdata_err(sdata,
|
|
"failed to set key (%d, %pM) to hardware (%d)\n",
|
|
key->conf.keyidx,
|
|
sta ? sta->sta.addr : bcast_addr, ret);
|
|
|
|
out_unsupported:
|
|
switch (key->conf.cipher) {
|
|
case WLAN_CIPHER_SUITE_WEP40:
|
|
case WLAN_CIPHER_SUITE_WEP104:
|
|
case WLAN_CIPHER_SUITE_TKIP:
|
|
case WLAN_CIPHER_SUITE_CCMP:
|
|
case WLAN_CIPHER_SUITE_AES_CMAC:
|
|
/* all of these we can do in software */
|
|
return 0;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata;
|
|
struct sta_info *sta;
|
|
int ret;
|
|
|
|
might_sleep();
|
|
|
|
if (!key || !key->local->ops->set_key)
|
|
return;
|
|
|
|
assert_key_lock(key->local);
|
|
|
|
if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
|
|
return;
|
|
|
|
sta = key->sta;
|
|
sdata = key->sdata;
|
|
|
|
if (!((key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC) ||
|
|
(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV) ||
|
|
(key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)))
|
|
increment_tailroom_need_count(sdata);
|
|
|
|
ret = drv_set_key(key->local, DISABLE_KEY, sdata,
|
|
sta ? &sta->sta : NULL, &key->conf);
|
|
|
|
if (ret)
|
|
sdata_err(sdata,
|
|
"failed to remove key (%d, %pM) from hardware (%d)\n",
|
|
key->conf.keyidx,
|
|
sta ? sta->sta.addr : bcast_addr, ret);
|
|
|
|
key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE;
|
|
}
|
|
|
|
void ieee80211_key_removed(struct ieee80211_key_conf *key_conf)
|
|
{
|
|
struct ieee80211_key *key;
|
|
|
|
key = container_of(key_conf, struct ieee80211_key, conf);
|
|
|
|
might_sleep();
|
|
assert_key_lock(key->local);
|
|
|
|
key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE;
|
|
|
|
/*
|
|
* Flush TX path to avoid attempts to use this key
|
|
* after this function returns. Until then, drivers
|
|
* must be prepared to handle the key.
|
|
*/
|
|
synchronize_rcu();
|
|
}
|
|
EXPORT_SYMBOL_GPL(ieee80211_key_removed);
|
|
|
|
static void __ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata,
|
|
int idx, bool uni, bool multi)
|
|
{
|
|
struct ieee80211_key *key = NULL;
|
|
|
|
assert_key_lock(sdata->local);
|
|
|
|
if (idx >= 0 && idx < NUM_DEFAULT_KEYS)
|
|
key = key_mtx_dereference(sdata->local, sdata->keys[idx]);
|
|
|
|
if (uni)
|
|
rcu_assign_pointer(sdata->default_unicast_key, key);
|
|
if (multi)
|
|
rcu_assign_pointer(sdata->default_multicast_key, key);
|
|
|
|
ieee80211_debugfs_key_update_default(sdata);
|
|
}
|
|
|
|
void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx,
|
|
bool uni, bool multi)
|
|
{
|
|
mutex_lock(&sdata->local->key_mtx);
|
|
__ieee80211_set_default_key(sdata, idx, uni, multi);
|
|
mutex_unlock(&sdata->local->key_mtx);
|
|
}
|
|
|
|
static void
|
|
__ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, int idx)
|
|
{
|
|
struct ieee80211_key *key = NULL;
|
|
|
|
assert_key_lock(sdata->local);
|
|
|
|
if (idx >= NUM_DEFAULT_KEYS &&
|
|
idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
|
|
key = key_mtx_dereference(sdata->local, sdata->keys[idx]);
|
|
|
|
rcu_assign_pointer(sdata->default_mgmt_key, key);
|
|
|
|
ieee80211_debugfs_key_update_default(sdata);
|
|
}
|
|
|
|
void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata,
|
|
int idx)
|
|
{
|
|
mutex_lock(&sdata->local->key_mtx);
|
|
__ieee80211_set_default_mgmt_key(sdata, idx);
|
|
mutex_unlock(&sdata->local->key_mtx);
|
|
}
|
|
|
|
|
|
static void __ieee80211_key_replace(struct ieee80211_sub_if_data *sdata,
|
|
struct sta_info *sta,
|
|
bool pairwise,
|
|
struct ieee80211_key *old,
|
|
struct ieee80211_key *new)
|
|
{
|
|
int idx;
|
|
bool defunikey, defmultikey, defmgmtkey;
|
|
|
|
if (new)
|
|
list_add_tail(&new->list, &sdata->key_list);
|
|
|
|
if (sta && pairwise) {
|
|
rcu_assign_pointer(sta->ptk, new);
|
|
} else if (sta) {
|
|
if (old)
|
|
idx = old->conf.keyidx;
|
|
else
|
|
idx = new->conf.keyidx;
|
|
rcu_assign_pointer(sta->gtk[idx], new);
|
|
} else {
|
|
WARN_ON(new && old && new->conf.keyidx != old->conf.keyidx);
|
|
|
|
if (old)
|
|
idx = old->conf.keyidx;
|
|
else
|
|
idx = new->conf.keyidx;
|
|
|
|
defunikey = old &&
|
|
old == key_mtx_dereference(sdata->local,
|
|
sdata->default_unicast_key);
|
|
defmultikey = old &&
|
|
old == key_mtx_dereference(sdata->local,
|
|
sdata->default_multicast_key);
|
|
defmgmtkey = old &&
|
|
old == key_mtx_dereference(sdata->local,
|
|
sdata->default_mgmt_key);
|
|
|
|
if (defunikey && !new)
|
|
__ieee80211_set_default_key(sdata, -1, true, false);
|
|
if (defmultikey && !new)
|
|
__ieee80211_set_default_key(sdata, -1, false, true);
|
|
if (defmgmtkey && !new)
|
|
__ieee80211_set_default_mgmt_key(sdata, -1);
|
|
|
|
rcu_assign_pointer(sdata->keys[idx], new);
|
|
if (defunikey && new)
|
|
__ieee80211_set_default_key(sdata, new->conf.keyidx,
|
|
true, false);
|
|
if (defmultikey && new)
|
|
__ieee80211_set_default_key(sdata, new->conf.keyidx,
|
|
false, true);
|
|
if (defmgmtkey && new)
|
|
__ieee80211_set_default_mgmt_key(sdata,
|
|
new->conf.keyidx);
|
|
}
|
|
|
|
if (old)
|
|
list_del(&old->list);
|
|
}
|
|
|
|
struct ieee80211_key *ieee80211_key_alloc(u32 cipher, int idx, size_t key_len,
|
|
const u8 *key_data,
|
|
size_t seq_len, const u8 *seq)
|
|
{
|
|
struct ieee80211_key *key;
|
|
int i, j, err;
|
|
|
|
BUG_ON(idx < 0 || idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS);
|
|
|
|
key = kzalloc(sizeof(struct ieee80211_key) + key_len, GFP_KERNEL);
|
|
if (!key)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
/*
|
|
* Default to software encryption; we'll later upload the
|
|
* key to the hardware if possible.
|
|
*/
|
|
key->conf.flags = 0;
|
|
key->flags = 0;
|
|
|
|
key->conf.cipher = cipher;
|
|
key->conf.keyidx = idx;
|
|
key->conf.keylen = key_len;
|
|
switch (cipher) {
|
|
case WLAN_CIPHER_SUITE_WEP40:
|
|
case WLAN_CIPHER_SUITE_WEP104:
|
|
key->conf.iv_len = WEP_IV_LEN;
|
|
key->conf.icv_len = WEP_ICV_LEN;
|
|
break;
|
|
case WLAN_CIPHER_SUITE_TKIP:
|
|
key->conf.iv_len = TKIP_IV_LEN;
|
|
key->conf.icv_len = TKIP_ICV_LEN;
|
|
if (seq) {
|
|
for (i = 0; i < NUM_RX_DATA_QUEUES; i++) {
|
|
key->u.tkip.rx[i].iv32 =
|
|
get_unaligned_le32(&seq[2]);
|
|
key->u.tkip.rx[i].iv16 =
|
|
get_unaligned_le16(seq);
|
|
}
|
|
}
|
|
spin_lock_init(&key->u.tkip.txlock);
|
|
break;
|
|
case WLAN_CIPHER_SUITE_CCMP:
|
|
key->conf.iv_len = CCMP_HDR_LEN;
|
|
key->conf.icv_len = CCMP_MIC_LEN;
|
|
if (seq) {
|
|
for (i = 0; i < NUM_RX_DATA_QUEUES + 1; i++)
|
|
for (j = 0; j < CCMP_PN_LEN; j++)
|
|
key->u.ccmp.rx_pn[i][j] =
|
|
seq[CCMP_PN_LEN - j - 1];
|
|
}
|
|
/*
|
|
* Initialize AES key state here as an optimization so that
|
|
* it does not need to be initialized for every packet.
|
|
*/
|
|
key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt(key_data);
|
|
if (IS_ERR(key->u.ccmp.tfm)) {
|
|
err = PTR_ERR(key->u.ccmp.tfm);
|
|
kfree(key);
|
|
return ERR_PTR(err);
|
|
}
|
|
break;
|
|
case WLAN_CIPHER_SUITE_AES_CMAC:
|
|
key->conf.iv_len = 0;
|
|
key->conf.icv_len = sizeof(struct ieee80211_mmie);
|
|
if (seq)
|
|
for (j = 0; j < 6; j++)
|
|
key->u.aes_cmac.rx_pn[j] = seq[6 - j - 1];
|
|
/*
|
|
* Initialize AES key state here as an optimization so that
|
|
* it does not need to be initialized for every packet.
|
|
*/
|
|
key->u.aes_cmac.tfm =
|
|
ieee80211_aes_cmac_key_setup(key_data);
|
|
if (IS_ERR(key->u.aes_cmac.tfm)) {
|
|
err = PTR_ERR(key->u.aes_cmac.tfm);
|
|
kfree(key);
|
|
return ERR_PTR(err);
|
|
}
|
|
break;
|
|
}
|
|
memcpy(key->conf.key, key_data, key_len);
|
|
INIT_LIST_HEAD(&key->list);
|
|
|
|
return key;
|
|
}
|
|
|
|
static void __ieee80211_key_destroy(struct ieee80211_key *key)
|
|
{
|
|
if (!key)
|
|
return;
|
|
|
|
/*
|
|
* Synchronize so the TX path can no longer be using
|
|
* this key before we free/remove it.
|
|
*/
|
|
synchronize_rcu();
|
|
|
|
if (key->local)
|
|
ieee80211_key_disable_hw_accel(key);
|
|
|
|
if (key->conf.cipher == WLAN_CIPHER_SUITE_CCMP)
|
|
ieee80211_aes_key_free(key->u.ccmp.tfm);
|
|
if (key->conf.cipher == WLAN_CIPHER_SUITE_AES_CMAC)
|
|
ieee80211_aes_cmac_key_free(key->u.aes_cmac.tfm);
|
|
if (key->local) {
|
|
ieee80211_debugfs_key_remove(key);
|
|
key->sdata->crypto_tx_tailroom_needed_cnt--;
|
|
}
|
|
|
|
kfree(key);
|
|
}
|
|
|
|
int ieee80211_key_link(struct ieee80211_key *key,
|
|
struct ieee80211_sub_if_data *sdata,
|
|
struct sta_info *sta)
|
|
{
|
|
struct ieee80211_key *old_key;
|
|
int idx, ret;
|
|
bool pairwise;
|
|
|
|
BUG_ON(!sdata);
|
|
BUG_ON(!key);
|
|
|
|
pairwise = key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE;
|
|
idx = key->conf.keyidx;
|
|
key->local = sdata->local;
|
|
key->sdata = sdata;
|
|
key->sta = sta;
|
|
|
|
if (sta) {
|
|
/*
|
|
* some hardware cannot handle TKIP with QoS, so
|
|
* we indicate whether QoS could be in use.
|
|
*/
|
|
if (test_sta_flag(sta, WLAN_STA_WME))
|
|
key->conf.flags |= IEEE80211_KEY_FLAG_WMM_STA;
|
|
} else {
|
|
if (sdata->vif.type == NL80211_IFTYPE_STATION) {
|
|
struct sta_info *ap;
|
|
|
|
/*
|
|
* We're getting a sta pointer in, so must be under
|
|
* appropriate locking for sta_info_get().
|
|
*/
|
|
|
|
/* same here, the AP could be using QoS */
|
|
ap = sta_info_get(key->sdata, key->sdata->u.mgd.bssid);
|
|
if (ap) {
|
|
if (test_sta_flag(ap, WLAN_STA_WME))
|
|
key->conf.flags |=
|
|
IEEE80211_KEY_FLAG_WMM_STA;
|
|
}
|
|
}
|
|
}
|
|
|
|
mutex_lock(&sdata->local->key_mtx);
|
|
|
|
if (sta && pairwise)
|
|
old_key = key_mtx_dereference(sdata->local, sta->ptk);
|
|
else if (sta)
|
|
old_key = key_mtx_dereference(sdata->local, sta->gtk[idx]);
|
|
else
|
|
old_key = key_mtx_dereference(sdata->local, sdata->keys[idx]);
|
|
|
|
increment_tailroom_need_count(sdata);
|
|
|
|
__ieee80211_key_replace(sdata, sta, pairwise, old_key, key);
|
|
__ieee80211_key_destroy(old_key);
|
|
|
|
ieee80211_debugfs_key_add(key);
|
|
|
|
ret = ieee80211_key_enable_hw_accel(key);
|
|
|
|
mutex_unlock(&sdata->local->key_mtx);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void __ieee80211_key_free(struct ieee80211_key *key)
|
|
{
|
|
if (!key)
|
|
return;
|
|
|
|
/*
|
|
* Replace key with nothingness if it was ever used.
|
|
*/
|
|
if (key->sdata)
|
|
__ieee80211_key_replace(key->sdata, key->sta,
|
|
key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE,
|
|
key, NULL);
|
|
__ieee80211_key_destroy(key);
|
|
}
|
|
|
|
void ieee80211_key_free(struct ieee80211_local *local,
|
|
struct ieee80211_key *key)
|
|
{
|
|
mutex_lock(&local->key_mtx);
|
|
__ieee80211_key_free(key);
|
|
mutex_unlock(&local->key_mtx);
|
|
}
|
|
|
|
void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_key *key;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if (WARN_ON(!ieee80211_sdata_running(sdata)))
|
|
return;
|
|
|
|
mutex_lock(&sdata->local->key_mtx);
|
|
|
|
sdata->crypto_tx_tailroom_needed_cnt = 0;
|
|
|
|
list_for_each_entry(key, &sdata->key_list, list) {
|
|
increment_tailroom_need_count(sdata);
|
|
ieee80211_key_enable_hw_accel(key);
|
|
}
|
|
|
|
mutex_unlock(&sdata->local->key_mtx);
|
|
}
|
|
|
|
void ieee80211_iter_keys(struct ieee80211_hw *hw,
|
|
struct ieee80211_vif *vif,
|
|
void (*iter)(struct ieee80211_hw *hw,
|
|
struct ieee80211_vif *vif,
|
|
struct ieee80211_sta *sta,
|
|
struct ieee80211_key_conf *key,
|
|
void *data),
|
|
void *iter_data)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
struct ieee80211_key *key;
|
|
struct ieee80211_sub_if_data *sdata;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
mutex_lock(&local->key_mtx);
|
|
if (vif) {
|
|
sdata = vif_to_sdata(vif);
|
|
list_for_each_entry(key, &sdata->key_list, list)
|
|
iter(hw, &sdata->vif,
|
|
key->sta ? &key->sta->sta : NULL,
|
|
&key->conf, iter_data);
|
|
} else {
|
|
list_for_each_entry(sdata, &local->interfaces, list)
|
|
list_for_each_entry(key, &sdata->key_list, list)
|
|
iter(hw, &sdata->vif,
|
|
key->sta ? &key->sta->sta : NULL,
|
|
&key->conf, iter_data);
|
|
}
|
|
mutex_unlock(&local->key_mtx);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_iter_keys);
|
|
|
|
void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_key *key;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
mutex_lock(&sdata->local->key_mtx);
|
|
|
|
list_for_each_entry(key, &sdata->key_list, list)
|
|
ieee80211_key_disable_hw_accel(key);
|
|
|
|
mutex_unlock(&sdata->local->key_mtx);
|
|
}
|
|
|
|
void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_key *key, *tmp;
|
|
|
|
mutex_lock(&sdata->local->key_mtx);
|
|
|
|
ieee80211_debugfs_key_remove_mgmt_default(sdata);
|
|
|
|
list_for_each_entry_safe(key, tmp, &sdata->key_list, list)
|
|
__ieee80211_key_free(key);
|
|
|
|
ieee80211_debugfs_key_update_default(sdata);
|
|
|
|
mutex_unlock(&sdata->local->key_mtx);
|
|
}
|
|
|
|
|
|
void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid,
|
|
const u8 *replay_ctr, gfp_t gfp)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
|
|
trace_api_gtk_rekey_notify(sdata, bssid, replay_ctr);
|
|
|
|
cfg80211_gtk_rekey_notify(sdata->dev, bssid, replay_ctr, gfp);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ieee80211_gtk_rekey_notify);
|
|
|
|
void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf,
|
|
struct ieee80211_key_seq *seq)
|
|
{
|
|
struct ieee80211_key *key;
|
|
u64 pn64;
|
|
|
|
if (WARN_ON(!(keyconf->flags & IEEE80211_KEY_FLAG_GENERATE_IV)))
|
|
return;
|
|
|
|
key = container_of(keyconf, struct ieee80211_key, conf);
|
|
|
|
switch (key->conf.cipher) {
|
|
case WLAN_CIPHER_SUITE_TKIP:
|
|
seq->tkip.iv32 = key->u.tkip.tx.iv32;
|
|
seq->tkip.iv16 = key->u.tkip.tx.iv16;
|
|
break;
|
|
case WLAN_CIPHER_SUITE_CCMP:
|
|
pn64 = atomic64_read(&key->u.ccmp.tx_pn);
|
|
seq->ccmp.pn[5] = pn64;
|
|
seq->ccmp.pn[4] = pn64 >> 8;
|
|
seq->ccmp.pn[3] = pn64 >> 16;
|
|
seq->ccmp.pn[2] = pn64 >> 24;
|
|
seq->ccmp.pn[1] = pn64 >> 32;
|
|
seq->ccmp.pn[0] = pn64 >> 40;
|
|
break;
|
|
case WLAN_CIPHER_SUITE_AES_CMAC:
|
|
pn64 = atomic64_read(&key->u.aes_cmac.tx_pn);
|
|
seq->ccmp.pn[5] = pn64;
|
|
seq->ccmp.pn[4] = pn64 >> 8;
|
|
seq->ccmp.pn[3] = pn64 >> 16;
|
|
seq->ccmp.pn[2] = pn64 >> 24;
|
|
seq->ccmp.pn[1] = pn64 >> 32;
|
|
seq->ccmp.pn[0] = pn64 >> 40;
|
|
break;
|
|
default:
|
|
WARN_ON(1);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_get_key_tx_seq);
|
|
|
|
void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf,
|
|
int tid, struct ieee80211_key_seq *seq)
|
|
{
|
|
struct ieee80211_key *key;
|
|
const u8 *pn;
|
|
|
|
key = container_of(keyconf, struct ieee80211_key, conf);
|
|
|
|
switch (key->conf.cipher) {
|
|
case WLAN_CIPHER_SUITE_TKIP:
|
|
if (WARN_ON(tid < 0 || tid >= NUM_RX_DATA_QUEUES))
|
|
return;
|
|
seq->tkip.iv32 = key->u.tkip.rx[tid].iv32;
|
|
seq->tkip.iv16 = key->u.tkip.rx[tid].iv16;
|
|
break;
|
|
case WLAN_CIPHER_SUITE_CCMP:
|
|
if (WARN_ON(tid < -1 || tid >= NUM_RX_DATA_QUEUES))
|
|
return;
|
|
if (tid < 0)
|
|
pn = key->u.ccmp.rx_pn[NUM_RX_DATA_QUEUES];
|
|
else
|
|
pn = key->u.ccmp.rx_pn[tid];
|
|
memcpy(seq->ccmp.pn, pn, CCMP_PN_LEN);
|
|
break;
|
|
case WLAN_CIPHER_SUITE_AES_CMAC:
|
|
if (WARN_ON(tid != 0))
|
|
return;
|
|
pn = key->u.aes_cmac.rx_pn;
|
|
memcpy(seq->aes_cmac.pn, pn, CMAC_PN_LEN);
|
|
break;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_get_key_rx_seq);
|