Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-19 02:21:47 +00:00
Code Issues Packages Projects Releases Wiki Activity
3bfbe80e44
linux/drivers/net/wireless/mac80211_hwsim.c
Johannes Berg f1d58c2521 mac80211: push rx status into skb->cb 
Within mac80211, we often need to copy the rx status into
skb->cb. This is wasteful, as drivers could be building it
in there to start with. This patch changes the API so that
drivers are expected to pass the RX status in skb->cb, now
accessible as IEEE80211_SKB_RXCB(skb). It also updates all
drivers to pass the rx status in there, but only by making
them memcpy() it into place before the call to the receive
function (ieee80211_rx(_irqsafe)). Each driver can now be
optimised on its own schedule.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-07-10 14:57:54 -04:00

1178 lines
32 KiB
C
Raw Blame History

/*
* mac80211_hwsim - software simulator of 802.11 radio(s) for mac80211
* Copyright (c) 2008, Jouni Malinen <j@w1.fi>
*
* 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.
*/
/*
* TODO:
* - IBSS mode simulation (Beacon transmission with competition for "air time")
* - RX filtering based on filter configuration (data->rx_filter)
*/
#include <linux/list.h>
#include <linux/spinlock.h>
#include <net/mac80211.h>
#include <net/ieee80211_radiotap.h>
#include <linux/if_arp.h>
#include <linux/rtnetlink.h>
#include <linux/etherdevice.h>
#include <linux/debugfs.h>
MODULE_AUTHOR("Jouni Malinen");
MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211");
MODULE_LICENSE("GPL");
static int radios = 2;
module_param(radios, int, 0444);
MODULE_PARM_DESC(radios, "Number of simulated radios");
/**
* enum hwsim_regtest - the type of regulatory tests we offer
*
* These are the different values you can use for the regtest
* module parameter. This is useful to help test world roaming
* and the driver regulatory_hint() call and combinations of these.
* If you want to do specific alpha2 regulatory domain tests simply
* use the userspace regulatory request as that will be respected as
* well without the need of this module parameter. This is designed
* only for testing the driver regulatory request, world roaming
* and all possible combinations.
*
* @HWSIM_REGTEST_DISABLED: No regulatory tests are performed,
* this is the default value.
* @HWSIM_REGTEST_DRIVER_REG_FOLLOW: Used for testing the driver regulatory
* hint, only one driver regulatory hint will be sent as such the
* secondary radios are expected to follow.
* @HWSIM_REGTEST_DRIVER_REG_ALL: Used for testing the driver regulatory
* request with all radios reporting the same regulatory domain.
* @HWSIM_REGTEST_DIFF_COUNTRY: Used for testing the drivers calling
* different regulatory domains requests. Expected behaviour is for
* an intersection to occur but each device will still use their
* respective regulatory requested domains. Subsequent radios will
* use the resulting intersection.
* @HWSIM_REGTEST_WORLD_ROAM: Used for testing the world roaming. We acomplish
* this by using a custom beacon-capable regulatory domain for the first
* radio. All other device world roam.
* @HWSIM_REGTEST_CUSTOM_WORLD: Used for testing the custom world regulatory
* domain requests. All radios will adhere to this custom world regulatory
* domain.
* @HWSIM_REGTEST_CUSTOM_WORLD_2: Used for testing 2 custom world regulatory
* domain requests. The first radio will adhere to the first custom world
* regulatory domain, the second one to the second custom world regulatory
* domain. All other devices will world roam.
* @HWSIM_REGTEST_STRICT_FOLLOW_: Used for testing strict regulatory domain
* settings, only the first radio will send a regulatory domain request
* and use strict settings. The rest of the radios are expected to follow.
* @HWSIM_REGTEST_STRICT_ALL: Used for testing strict regulatory domain
* settings. All radios will adhere to this.
* @HWSIM_REGTEST_STRICT_AND_DRIVER_REG: Used for testing strict regulatory
* domain settings, combined with secondary driver regulatory domain
* settings. The first radio will get a strict regulatory domain setting
* using the first driver regulatory request and the second radio will use
* non-strict settings using the second driver regulatory request. All
* other devices should follow the intersection created between the
* first two.
* @HWSIM_REGTEST_ALL: Used for testing every possible mix. You will need
* at least 6 radios for a complete test. We will test in this order:
* 1 - driver custom world regulatory domain
* 2 - second custom world regulatory domain
* 3 - first driver regulatory domain request
* 4 - second driver regulatory domain request
* 5 - strict regulatory domain settings using the third driver regulatory
* domain request
* 6 and on - should follow the intersection of the 3rd, 4rth and 5th radio
* regulatory requests.
*/
enum hwsim_regtest {
HWSIM_REGTEST_DISABLED = 0,
HWSIM_REGTEST_DRIVER_REG_FOLLOW = 1,
HWSIM_REGTEST_DRIVER_REG_ALL = 2,
HWSIM_REGTEST_DIFF_COUNTRY = 3,
HWSIM_REGTEST_WORLD_ROAM = 4,
HWSIM_REGTEST_CUSTOM_WORLD = 5,
HWSIM_REGTEST_CUSTOM_WORLD_2 = 6,
HWSIM_REGTEST_STRICT_FOLLOW = 7,
HWSIM_REGTEST_STRICT_ALL = 8,
HWSIM_REGTEST_STRICT_AND_DRIVER_REG = 9,
HWSIM_REGTEST_ALL = 10,
};
/* Set to one of the HWSIM_REGTEST_* values above */
static int regtest = HWSIM_REGTEST_DISABLED;
module_param(regtest, int, 0444);
MODULE_PARM_DESC(regtest, "The type of regulatory test we want to run");
static const char *hwsim_alpha2s[] = {
"FI",
"AL",
"US",
"DE",
"JP",
"AL",
};
static const struct ieee80211_regdomain hwsim_world_regdom_custom_01 = {
.n_reg_rules = 4,
.alpha2 = "99",
.reg_rules = {
REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
REG_RULE(2484-10, 2484+10, 40, 0, 20, 0),
REG_RULE(5150-10, 5240+10, 40, 0, 30, 0),
REG_RULE(5745-10, 5825+10, 40, 0, 30, 0),
}
};
static const struct ieee80211_regdomain hwsim_world_regdom_custom_02 = {
.n_reg_rules = 2,
.alpha2 = "99",
.reg_rules = {
REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
REG_RULE(5725-10, 5850+10, 40, 0, 30,
NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS),
}
};
struct hwsim_vif_priv {
u32 magic;
u8 bssid[ETH_ALEN];
bool assoc;
u16 aid;
};
#define HWSIM_VIF_MAGIC 0x69537748
static inline void hwsim_check_magic(struct ieee80211_vif *vif)
{
struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
WARN_ON(vp->magic != HWSIM_VIF_MAGIC);
}
static inline void hwsim_set_magic(struct ieee80211_vif *vif)
{
struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
vp->magic = HWSIM_VIF_MAGIC;
}
static inline void hwsim_clear_magic(struct ieee80211_vif *vif)
{
struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
vp->magic = 0;
}
struct hwsim_sta_priv {
u32 magic;
};
#define HWSIM_STA_MAGIC 0x6d537748
static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta)
{
struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
WARN_ON(sp->magic != HWSIM_STA_MAGIC);
}
static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta)
{
struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
sp->magic = HWSIM_STA_MAGIC;
}
static inline void hwsim_clear_sta_magic(struct ieee80211_sta *sta)
{
struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
sp->magic = 0;
}
static struct class *hwsim_class;
static struct net_device *hwsim_mon; /* global monitor netdev */
#define CHAN2G(_freq) { \
.band = IEEE80211_BAND_2GHZ, \
.center_freq = (_freq), \
.hw_value = (_freq), \
.max_power = 20, \
}
#define CHAN5G(_freq) { \
.band = IEEE80211_BAND_5GHZ, \
.center_freq = (_freq), \
.hw_value = (_freq), \
.max_power = 20, \
}
static const struct ieee80211_channel hwsim_channels_2ghz[] = {
CHAN2G(2412), /* Channel 1 */
CHAN2G(2417), /* Channel 2 */
CHAN2G(2422), /* Channel 3 */
CHAN2G(2427), /* Channel 4 */
CHAN2G(2432), /* Channel 5 */
CHAN2G(2437), /* Channel 6 */
CHAN2G(2442), /* Channel 7 */
CHAN2G(2447), /* Channel 8 */
CHAN2G(2452), /* Channel 9 */
CHAN2G(2457), /* Channel 10 */
CHAN2G(2462), /* Channel 11 */
CHAN2G(2467), /* Channel 12 */
CHAN2G(2472), /* Channel 13 */
CHAN2G(2484), /* Channel 14 */
};
static const struct ieee80211_channel hwsim_channels_5ghz[] = {
CHAN5G(5180), /* Channel 36 */
CHAN5G(5200), /* Channel 40 */
CHAN5G(5220), /* Channel 44 */
CHAN5G(5240), /* Channel 48 */
CHAN5G(5260), /* Channel 52 */
CHAN5G(5280), /* Channel 56 */
CHAN5G(5300), /* Channel 60 */
CHAN5G(5320), /* Channel 64 */
CHAN5G(5500), /* Channel 100 */
CHAN5G(5520), /* Channel 104 */
CHAN5G(5540), /* Channel 108 */
CHAN5G(5560), /* Channel 112 */
CHAN5G(5580), /* Channel 116 */
CHAN5G(5600), /* Channel 120 */
CHAN5G(5620), /* Channel 124 */
CHAN5G(5640), /* Channel 128 */
CHAN5G(5660), /* Channel 132 */
CHAN5G(5680), /* Channel 136 */
CHAN5G(5700), /* Channel 140 */
CHAN5G(5745), /* Channel 149 */
CHAN5G(5765), /* Channel 153 */
CHAN5G(5785), /* Channel 157 */
CHAN5G(5805), /* Channel 161 */
CHAN5G(5825), /* Channel 165 */
};
static const struct ieee80211_rate hwsim_rates[] = {
{ .bitrate = 10 },
{ .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
{ .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
{ .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
{ .bitrate = 60 },
{ .bitrate = 90 },
{ .bitrate = 120 },
{ .bitrate = 180 },
{ .bitrate = 240 },
{ .bitrate = 360 },
{ .bitrate = 480 },
{ .bitrate = 540 }
};
static spinlock_t hwsim_radio_lock;
static struct list_head hwsim_radios;
struct mac80211_hwsim_data {
struct list_head list;
struct ieee80211_hw *hw;
struct device *dev;
struct ieee80211_supported_band bands[2];
struct ieee80211_channel channels_2ghz[ARRAY_SIZE(hwsim_channels_2ghz)];
struct ieee80211_channel channels_5ghz[ARRAY_SIZE(hwsim_channels_5ghz)];
struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
struct ieee80211_channel *channel;
unsigned long beacon_int; /* in jiffies unit */
unsigned int rx_filter;
int started;
struct timer_list beacon_timer;
enum ps_mode {
PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL
} ps;
bool ps_poll_pending;
struct dentry *debugfs;
struct dentry *debugfs_ps;
/*
* Only radios in the same group can communicate together (the
* channel has to match too). Each bit represents a group. A
* radio can be in more then one group.
*/
u64 group;
struct dentry *debugfs_group;
};
struct hwsim_radiotap_hdr {
struct ieee80211_radiotap_header hdr;
u8 rt_flags;
u8 rt_rate;
__le16 rt_channel;
__le16 rt_chbitmask;
} __attribute__ ((packed));
static int hwsim_mon_xmit(struct sk_buff *skb, struct net_device *dev)
{
/* TODO: allow packet injection */
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
struct sk_buff *tx_skb)
{
struct mac80211_hwsim_data *data = hw->priv;
struct sk_buff *skb;
struct hwsim_radiotap_hdr *hdr;
u16 flags;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
if (!netif_running(hwsim_mon))
return;
skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
if (skb == NULL)
return;
hdr = (struct hwsim_radiotap_hdr *) skb_push(skb, sizeof(*hdr));
hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
hdr->hdr.it_pad = 0;
hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
(1 << IEEE80211_RADIOTAP_RATE) |
(1 << IEEE80211_RADIOTAP_CHANNEL));
hdr->rt_flags = 0;
hdr->rt_rate = txrate->bitrate / 5;
hdr->rt_channel = cpu_to_le16(data->channel->center_freq);
flags = IEEE80211_CHAN_2GHZ;
if (txrate->flags & IEEE80211_RATE_ERP_G)
flags |= IEEE80211_CHAN_OFDM;
else
flags |= IEEE80211_CHAN_CCK;
hdr->rt_chbitmask = cpu_to_le16(flags);
skb->dev = hwsim_mon;
skb_set_mac_header(skb, 0);
skb->ip_summed = CHECKSUM_UNNECESSARY;
skb->pkt_type = PACKET_OTHERHOST;
skb->protocol = htons(ETH_P_802_2);
memset(skb->cb, 0, sizeof(skb->cb));
netif_rx(skb);
}
static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
struct sk_buff *skb)
{
switch (data->ps) {
case PS_DISABLED:
return true;
case PS_ENABLED:
return false;
case PS_AUTO_POLL:
/* TODO: accept (some) Beacons by default and other frames only
* if pending PS-Poll has been sent */
return true;
case PS_MANUAL_POLL:
/* Allow unicast frames to own address if there is a pending
* PS-Poll */
if (data->ps_poll_pending &&
memcmp(data->hw->wiphy->perm_addr, skb->data + 4,
ETH_ALEN) == 0) {
data->ps_poll_pending = false;
return true;
}
return false;
}
return true;
}
static bool mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
struct sk_buff *skb)
{
struct mac80211_hwsim_data *data = hw->priv, *data2;
bool ack = false;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_rx_status rx_status;
memset(&rx_status, 0, sizeof(rx_status));
/* TODO: set mactime */
rx_status.freq = data->channel->center_freq;
rx_status.band = data->channel->band;
rx_status.rate_idx = info->control.rates[0].idx;
/* TODO: simulate signal strength (and optional packet drop) */
if (data->ps != PS_DISABLED)
hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
/* Copy skb to all enabled radios that are on the current frequency */
spin_lock(&hwsim_radio_lock);
list_for_each_entry(data2, &hwsim_radios, list) {
struct sk_buff *nskb;
if (data == data2)
continue;
if (!data2->started || !hwsim_ps_rx_ok(data2, skb) ||
!data->channel || !data2->channel ||
data->channel->center_freq != data2->channel->center_freq ||
!(data->group & data2->group))
continue;
nskb = skb_copy(skb, GFP_ATOMIC);
if (nskb == NULL)
continue;
if (memcmp(hdr->addr1, data2->hw->wiphy->perm_addr,
ETH_ALEN) == 0)
ack = true;
memcpy(IEEE80211_SKB_RXCB(nskb), &rx_status, sizeof(rx_status));
ieee80211_rx_irqsafe(data2->hw, nskb);
}
spin_unlock(&hwsim_radio_lock);
return ack;
}
static int mac80211_hwsim_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
{
bool ack;
struct ieee80211_tx_info *txi;
mac80211_hwsim_monitor_rx(hw, skb);
if (skb->len < 10) {
/* Should not happen; just a sanity check for addr1 use */
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
ack = mac80211_hwsim_tx_frame(hw, skb);
txi = IEEE80211_SKB_CB(skb);
if (txi->control.vif)
hwsim_check_magic(txi->control.vif);
if (txi->control.sta)
hwsim_check_sta_magic(txi->control.sta);
ieee80211_tx_info_clear_status(txi);
if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
txi->flags |= IEEE80211_TX_STAT_ACK;
ieee80211_tx_status_irqsafe(hw, skb);
return NETDEV_TX_OK;
}
static int mac80211_hwsim_start(struct ieee80211_hw *hw)
{
struct mac80211_hwsim_data *data = hw->priv;
printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
data->started = 1;
return 0;
}
static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
{
struct mac80211_hwsim_data *data = hw->priv;
data->started = 0;
del_timer(&data->beacon_timer);
printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
}
static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
struct ieee80211_if_init_conf *conf)
{
printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%pM)\n",
wiphy_name(hw->wiphy), __func__, conf->type,
conf->mac_addr);
hwsim_set_magic(conf->vif);
return 0;
}
static void mac80211_hwsim_remove_interface(
struct ieee80211_hw *hw, struct ieee80211_if_init_conf *conf)
{
printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%pM)\n",
wiphy_name(hw->wiphy), __func__, conf->type,
conf->mac_addr);
hwsim_check_magic(conf->vif);
hwsim_clear_magic(conf->vif);
}
static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
struct ieee80211_vif *vif)
{
struct ieee80211_hw *hw = arg;
struct sk_buff *skb;
struct ieee80211_tx_info *info;
hwsim_check_magic(vif);
if (vif->type != NL80211_IFTYPE_AP &&
vif->type != NL80211_IFTYPE_MESH_POINT)
return;
skb = ieee80211_beacon_get(hw, vif);
if (skb == NULL)
return;
info = IEEE80211_SKB_CB(skb);
mac80211_hwsim_monitor_rx(hw, skb);
mac80211_hwsim_tx_frame(hw, skb);
dev_kfree_skb(skb);
}
static void mac80211_hwsim_beacon(unsigned long arg)
{
struct ieee80211_hw *hw = (struct ieee80211_hw *) arg;
struct mac80211_hwsim_data *data = hw->priv;
if (!data->started)
return;
ieee80211_iterate_active_interfaces_atomic(
hw, mac80211_hwsim_beacon_tx, hw);
data->beacon_timer.expires = jiffies + data->beacon_int;
add_timer(&data->beacon_timer);
}
static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
{
struct mac80211_hwsim_data *data = hw->priv;
struct ieee80211_conf *conf = &hw->conf;
printk(KERN_DEBUG "%s:%s (freq=%d idle=%d ps=%d)\n",
wiphy_name(hw->wiphy), __func__,
conf->channel->center_freq,
!!(conf->flags & IEEE80211_CONF_IDLE),
!!(conf->flags & IEEE80211_CONF_PS));
data->channel = conf->channel;
if (!data->started || !data->beacon_int)
del_timer(&data->beacon_timer);
else
mod_timer(&data->beacon_timer, jiffies + data->beacon_int);
return 0;
}
static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
unsigned int changed_flags,
unsigned int *total_flags,
int mc_count,
struct dev_addr_list *mc_list)
{
struct mac80211_hwsim_data *data = hw->priv;
printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
data->rx_filter = 0;
if (*total_flags & FIF_PROMISC_IN_BSS)
data->rx_filter |= FIF_PROMISC_IN_BSS;
if (*total_flags & FIF_ALLMULTI)
data->rx_filter |= FIF_ALLMULTI;
*total_flags = data->rx_filter;
}
static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *info,
u32 changed)
{
struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
struct mac80211_hwsim_data *data = hw->priv;
hwsim_check_magic(vif);
printk(KERN_DEBUG "%s:%s(changed=0x%x)\n",
wiphy_name(hw->wiphy), __func__, changed);
if (changed & BSS_CHANGED_BSSID) {
printk(KERN_DEBUG "%s:%s: BSSID changed: %pM\n",
wiphy_name(hw->wiphy), __func__,
info->bssid);
memcpy(vp->bssid, info->bssid, ETH_ALEN);
}
if (changed & BSS_CHANGED_ASSOC) {
printk(KERN_DEBUG " %s: ASSOC: assoc=%d aid=%d\n",
wiphy_name(hw->wiphy), info->assoc, info->aid);
vp->assoc = info->assoc;
vp->aid = info->aid;
}
if (changed & BSS_CHANGED_BEACON_INT) {
printk(KERN_DEBUG " %s: BCNINT: %d\n",
wiphy_name(hw->wiphy), info->beacon_int);
data->beacon_int = 1024 * info->beacon_int / 1000 * HZ / 1000;
if (WARN_ON(!data->beacon_int))
data->beacon_int = 1;
}
if (changed & BSS_CHANGED_ERP_CTS_PROT) {
printk(KERN_DEBUG " %s: ERP_CTS_PROT: %d\n",
wiphy_name(hw->wiphy), info->use_cts_prot);
}
if (changed & BSS_CHANGED_ERP_PREAMBLE) {
printk(KERN_DEBUG " %s: ERP_PREAMBLE: %d\n",
wiphy_name(hw->wiphy), info->use_short_preamble);
}
if (changed & BSS_CHANGED_ERP_SLOT) {
printk(KERN_DEBUG " %s: ERP_SLOT: %d\n",
wiphy_name(hw->wiphy), info->use_short_slot);
}
if (changed & BSS_CHANGED_HT) {
printk(KERN_DEBUG " %s: HT: op_mode=0x%x\n",
wiphy_name(hw->wiphy),
info->ht_operation_mode);
}
if (changed & BSS_CHANGED_BASIC_RATES) {
printk(KERN_DEBUG " %s: BASIC_RATES: 0x%llx\n",
wiphy_name(hw->wiphy),
(unsigned long long) info->basic_rates);
}
}
static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
enum sta_notify_cmd cmd,
struct ieee80211_sta *sta)
{
hwsim_check_magic(vif);
switch (cmd) {
case STA_NOTIFY_ADD:
hwsim_set_sta_magic(sta);
break;
case STA_NOTIFY_REMOVE:
hwsim_clear_sta_magic(sta);
break;
case STA_NOTIFY_SLEEP:
case STA_NOTIFY_AWAKE:
/* TODO: make good use of these flags */
break;
}
}
static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
struct ieee80211_sta *sta,
bool set)
{
hwsim_check_sta_magic(sta);
return 0;
}
static int mac80211_hwsim_conf_tx(
struct ieee80211_hw *hw, u16 queue,
const struct ieee80211_tx_queue_params *params)
{
printk(KERN_DEBUG "%s:%s (queue=%d txop=%d cw_min=%d cw_max=%d "
"aifs=%d)\n",
wiphy_name(hw->wiphy), __func__, queue,
params->txop, params->cw_min, params->cw_max, params->aifs);
return 0;
}
static const struct ieee80211_ops mac80211_hwsim_ops =
{
.tx = mac80211_hwsim_tx,
.start = mac80211_hwsim_start,
.stop = mac80211_hwsim_stop,
.add_interface = mac80211_hwsim_add_interface,
.remove_interface = mac80211_hwsim_remove_interface,
.config = mac80211_hwsim_config,
.configure_filter = mac80211_hwsim_configure_filter,
.bss_info_changed = mac80211_hwsim_bss_info_changed,
.sta_notify = mac80211_hwsim_sta_notify,
.set_tim = mac80211_hwsim_set_tim,
.conf_tx = mac80211_hwsim_conf_tx,
};
static void mac80211_hwsim_free(void)
{
struct list_head tmplist, *i, *tmp;
struct mac80211_hwsim_data *data;
INIT_LIST_HEAD(&tmplist);
spin_lock_bh(&hwsim_radio_lock);
list_for_each_safe(i, tmp, &hwsim_radios)
list_move(i, &tmplist);
spin_unlock_bh(&hwsim_radio_lock);
list_for_each_entry(data, &tmplist, list) {
debugfs_remove(data->debugfs_group);
debugfs_remove(data->debugfs_ps);
debugfs_remove(data->debugfs);
ieee80211_unregister_hw(data->hw);
device_unregister(data->dev);
ieee80211_free_hw(data->hw);
}
class_destroy(hwsim_class);
}
static struct device_driver mac80211_hwsim_driver = {
.name = "mac80211_hwsim"
};
static const struct net_device_ops hwsim_netdev_ops = {
.ndo_start_xmit = hwsim_mon_xmit,
.ndo_change_mtu = eth_change_mtu,
.ndo_set_mac_address = eth_mac_addr,
.ndo_validate_addr = eth_validate_addr,
};
static void hwsim_mon_setup(struct net_device *dev)
{
dev->netdev_ops = &hwsim_netdev_ops;
dev->destructor = free_netdev;
ether_setup(dev);
dev->tx_queue_len = 0;
dev->type = ARPHRD_IEEE80211_RADIOTAP;
memset(dev->dev_addr, 0, ETH_ALEN);
dev->dev_addr[0] = 0x12;
}
static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
{
struct mac80211_hwsim_data *data = dat;
struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
DECLARE_MAC_BUF(buf);
struct sk_buff *skb;
struct ieee80211_pspoll *pspoll;
if (!vp->assoc)
return;
printk(KERN_DEBUG "%s:%s: send PS-Poll to %pM for aid %d\n",
wiphy_name(data->hw->wiphy), __func__, vp->bssid, vp->aid);
skb = dev_alloc_skb(sizeof(*pspoll));
if (!skb)
return;
pspoll = (void *) skb_put(skb, sizeof(*pspoll));
pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
IEEE80211_STYPE_PSPOLL |
IEEE80211_FCTL_PM);
pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
memcpy(pspoll->ta, mac, ETH_ALEN);
if (!mac80211_hwsim_tx_frame(data->hw, skb))
printk(KERN_DEBUG "%s: PS-Poll frame not ack'ed\n", __func__);
dev_kfree_skb(skb);
}
static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
struct ieee80211_vif *vif, int ps)
{
struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
DECLARE_MAC_BUF(buf);
struct sk_buff *skb;
struct ieee80211_hdr *hdr;
if (!vp->assoc)
return;
printk(KERN_DEBUG "%s:%s: send data::nullfunc to %pM ps=%d\n",
wiphy_name(data->hw->wiphy), __func__, vp->bssid, ps);
skb = dev_alloc_skb(sizeof(*hdr));
if (!skb)
return;
hdr = (void *) skb_put(skb, sizeof(*hdr) - ETH_ALEN);
hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
IEEE80211_STYPE_NULLFUNC |
(ps ? IEEE80211_FCTL_PM : 0));
hdr->duration_id = cpu_to_le16(0);
memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
memcpy(hdr->addr2, mac, ETH_ALEN);
memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
if (!mac80211_hwsim_tx_frame(data->hw, skb))
printk(KERN_DEBUG "%s: nullfunc frame not ack'ed\n", __func__);
dev_kfree_skb(skb);
}
static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
struct ieee80211_vif *vif)
{
struct mac80211_hwsim_data *data = dat;
hwsim_send_nullfunc(data, mac, vif, 1);
}
static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
struct ieee80211_vif *vif)
{
struct mac80211_hwsim_data *data = dat;
hwsim_send_nullfunc(data, mac, vif, 0);
}
static int hwsim_fops_ps_read(void *dat, u64 *val)
{
struct mac80211_hwsim_data *data = dat;
*val = data->ps;
return 0;
}
static int hwsim_fops_ps_write(void *dat, u64 val)
{
struct mac80211_hwsim_data *data = dat;
enum ps_mode old_ps;
if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
val != PS_MANUAL_POLL)
return -EINVAL;
old_ps = data->ps;
data->ps = val;
if (val == PS_MANUAL_POLL) {
ieee80211_iterate_active_interfaces(data->hw,
hwsim_send_ps_poll, data);
data->ps_poll_pending = true;
} else if (old_ps == PS_DISABLED && val != PS_DISABLED) {
ieee80211_iterate_active_interfaces(data->hw,
hwsim_send_nullfunc_ps,
data);
} else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
ieee80211_iterate_active_interfaces(data->hw,
hwsim_send_nullfunc_no_ps,
data);
}
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
"%llu\n");
static int hwsim_fops_group_read(void *dat, u64 *val)
{
struct mac80211_hwsim_data *data = dat;
*val = data->group;
return 0;
}
static int hwsim_fops_group_write(void *dat, u64 val)
{
struct mac80211_hwsim_data *data = dat;
data->group = val;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_group,
hwsim_fops_group_read, hwsim_fops_group_write,
"%llx\n");
static int __init init_mac80211_hwsim(void)
{
int i, err = 0;
u8 addr[ETH_ALEN];
struct mac80211_hwsim_data *data;
struct ieee80211_hw *hw;
enum ieee80211_band band;
if (radios < 1 || radios > 100)
return -EINVAL;
spin_lock_init(&hwsim_radio_lock);
INIT_LIST_HEAD(&hwsim_radios);
hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
if (IS_ERR(hwsim_class))
return PTR_ERR(hwsim_class);
memset(addr, 0, ETH_ALEN);
addr[0] = 0x02;
for (i = 0; i < radios; i++) {
printk(KERN_DEBUG "mac80211_hwsim: Initializing radio %d\n",
i);
hw = ieee80211_alloc_hw(sizeof(*data), &mac80211_hwsim_ops);
if (!hw) {
printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw "
"failed\n");
err = -ENOMEM;
goto failed;
}
data = hw->priv;
data->hw = hw;
data->dev = device_create(hwsim_class, NULL, 0, hw,
"hwsim%d", i);
if (IS_ERR(data->dev)) {
printk(KERN_DEBUG
"mac80211_hwsim: device_create "
"failed (%ld)\n", PTR_ERR(data->dev));
err = -ENOMEM;
goto failed_drvdata;
}
data->dev->driver = &mac80211_hwsim_driver;
SET_IEEE80211_DEV(hw, data->dev);
addr[3] = i >> 8;
addr[4] = i;
SET_IEEE80211_PERM_ADDR(hw, addr);
hw->channel_change_time = 1;
hw->queues = 4;
hw->wiphy->interface_modes =
BIT(NL80211_IFTYPE_STATION) |
BIT(NL80211_IFTYPE_AP) |
BIT(NL80211_IFTYPE_MESH_POINT);
hw->flags = IEEE80211_HW_MFP_CAPABLE;
/* ask mac80211 to reserve space for magic */
hw->vif_data_size = sizeof(struct hwsim_vif_priv);
hw->sta_data_size = sizeof(struct hwsim_sta_priv);
memcpy(data->channels_2ghz, hwsim_channels_2ghz,
sizeof(hwsim_channels_2ghz));
memcpy(data->channels_5ghz, hwsim_channels_5ghz,
sizeof(hwsim_channels_5ghz));
memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
struct ieee80211_supported_band *sband = &data->bands[band];
switch (band) {
case IEEE80211_BAND_2GHZ:
sband->channels = data->channels_2ghz;
sband->n_channels =
ARRAY_SIZE(hwsim_channels_2ghz);
break;
case IEEE80211_BAND_5GHZ:
sband->channels = data->channels_5ghz;
sband->n_channels =
ARRAY_SIZE(hwsim_channels_5ghz);
break;
default:
break;
}
sband->bitrates = data->rates;
sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
sband->ht_cap.ht_supported = true;
sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
IEEE80211_HT_CAP_GRN_FLD |
IEEE80211_HT_CAP_SGI_40 |
IEEE80211_HT_CAP_DSSSCCK40;
sband->ht_cap.ampdu_factor = 0x3;
sband->ht_cap.ampdu_density = 0x6;
memset(&sband->ht_cap.mcs, 0,
sizeof(sband->ht_cap.mcs));
sband->ht_cap.mcs.rx_mask[0] = 0xff;
sband->ht_cap.mcs.rx_mask[1] = 0xff;
sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
hw->wiphy->bands[band] = sband;
}
/* By default all radios are belonging to the first group */
data->group = 1;
/* Work to be done prior to ieee80211_register_hw() */
switch (regtest) {
case HWSIM_REGTEST_DISABLED:
case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
case HWSIM_REGTEST_DRIVER_REG_ALL:
case HWSIM_REGTEST_DIFF_COUNTRY:
/*
* Nothing to be done for driver regulatory domain
* hints prior to ieee80211_register_hw()
*/
break;
case HWSIM_REGTEST_WORLD_ROAM:
if (i == 0) {
hw->wiphy->custom_regulatory = true;
wiphy_apply_custom_regulatory(hw->wiphy,
&hwsim_world_regdom_custom_01);
}
break;
case HWSIM_REGTEST_CUSTOM_WORLD:
hw->wiphy->custom_regulatory = true;
wiphy_apply_custom_regulatory(hw->wiphy,
&hwsim_world_regdom_custom_01);
break;
case HWSIM_REGTEST_CUSTOM_WORLD_2:
if (i == 0) {
hw->wiphy->custom_regulatory = true;
wiphy_apply_custom_regulatory(hw->wiphy,
&hwsim_world_regdom_custom_01);
} else if (i == 1) {
hw->wiphy->custom_regulatory = true;
wiphy_apply_custom_regulatory(hw->wiphy,
&hwsim_world_regdom_custom_02);
}
break;
case HWSIM_REGTEST_STRICT_ALL:
hw->wiphy->strict_regulatory = true;
break;
case HWSIM_REGTEST_STRICT_FOLLOW:
case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
if (i == 0)
hw->wiphy->strict_regulatory = true;
break;
case HWSIM_REGTEST_ALL:
if (i == 0) {
hw->wiphy->custom_regulatory = true;
wiphy_apply_custom_regulatory(hw->wiphy,
&hwsim_world_regdom_custom_01);
} else if (i == 1) {
hw->wiphy->custom_regulatory = true;
wiphy_apply_custom_regulatory(hw->wiphy,
&hwsim_world_regdom_custom_02);
} else if (i == 4)
hw->wiphy->strict_regulatory = true;
break;
default:
break;
}
/* give the regulatory workqueue a chance to run */
if (regtest)
schedule_timeout_interruptible(1);
err = ieee80211_register_hw(hw);
if (err < 0) {
printk(KERN_DEBUG "mac80211_hwsim: "
"ieee80211_register_hw failed (%d)\n", err);
goto failed_hw;
}
/* Work to be done after to ieee80211_register_hw() */
switch (regtest) {
case HWSIM_REGTEST_WORLD_ROAM:
case HWSIM_REGTEST_DISABLED:
break;
case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
if (!i)
regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
break;
case HWSIM_REGTEST_DRIVER_REG_ALL:
case HWSIM_REGTEST_STRICT_ALL:
regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
break;
case HWSIM_REGTEST_DIFF_COUNTRY:
if (i < ARRAY_SIZE(hwsim_alpha2s))
regulatory_hint(hw->wiphy, hwsim_alpha2s[i]);
break;
case HWSIM_REGTEST_CUSTOM_WORLD:
case HWSIM_REGTEST_CUSTOM_WORLD_2:
/*
* Nothing to be done for custom world regulatory
* domains after to ieee80211_register_hw
*/
break;
case HWSIM_REGTEST_STRICT_FOLLOW:
if (i == 0)
regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
break;
case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
if (i == 0)
regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
else if (i == 1)
regulatory_hint(hw->wiphy, hwsim_alpha2s[1]);
break;
case HWSIM_REGTEST_ALL:
if (i == 2)
regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
else if (i == 3)
regulatory_hint(hw->wiphy, hwsim_alpha2s[1]);
else if (i == 4)
regulatory_hint(hw->wiphy, hwsim_alpha2s[2]);
break;
default:
break;
}
printk(KERN_DEBUG "%s: hwaddr %pM registered\n",
wiphy_name(hw->wiphy),
hw->wiphy->perm_addr);
data->debugfs = debugfs_create_dir("hwsim",
hw->wiphy->debugfsdir);
data->debugfs_ps = debugfs_create_file("ps", 0666,
data->debugfs, data,
&hwsim_fops_ps);
data->debugfs_group = debugfs_create_file("group", 0666,
data->debugfs, data,
&hwsim_fops_group);
setup_timer(&data->beacon_timer, mac80211_hwsim_beacon,
(unsigned long) hw);
list_add_tail(&data->list, &hwsim_radios);
}
hwsim_mon = alloc_netdev(0, "hwsim%d", hwsim_mon_setup);
if (hwsim_mon == NULL)
goto failed;
rtnl_lock();
err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
if (err < 0)
goto failed_mon;
err = register_netdevice(hwsim_mon);
if (err < 0)
goto failed_mon;
rtnl_unlock();
return 0;
failed_mon:
rtnl_unlock();
free_netdev(hwsim_mon);
mac80211_hwsim_free();
return err;
failed_hw:
device_unregister(data->dev);
failed_drvdata:
ieee80211_free_hw(hw);
failed:
mac80211_hwsim_free();
return err;
}
static void __exit exit_mac80211_hwsim(void)
{
printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n");
unregister_netdev(hwsim_mon);
mac80211_hwsim_free();
}
module_init(init_mac80211_hwsim);
module_exit(exit_mac80211_hwsim);
Reference in New Issue View Git Blame Copy Permalink