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mac80211 hwsim: verify sta pointers

Browse source 
In analogy with the previous patch to make mac80211-hwsim
verify that the virtual interface pointers are correct,
this makes it very that it knows about all station structs.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2008-09-11 02:17:01 +02:00 committed by John W. Linville
parent 17741cdc26
commit 81c0652386
1 changed files with 44 additions and 0 deletions
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44
drivers/net/wireless/mac80211_hwsim.c
View file

@ -52,6 +52,30 @@ static inline void hwsim_clear_magic(struct ieee80211_vif *vif)
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_VIF_MAGIC);
}
static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta)
{
struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
sp->magic = HWSIM_VIF_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 ieee80211_hw **hwsim_radios;
@ -235,6 +259,8 @@ static int mac80211_hwsim_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
txi = IEEE80211_SKB_CB(skb);
hwsim_check_magic(txi->control.vif);
if (txi->control.sta)
hwsim_check_sta_magic(txi->control.sta);
memset(&txi->status, 0, sizeof(txi->status));
if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK)) {
@ -394,6 +420,22 @@ static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
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;
}
}
static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
struct ieee80211_sta *sta,
bool set)
{
hwsim_check_sta_magic(sta);
return 0;
}
static const struct ieee80211_ops mac80211_hwsim_ops =
@ -408,6 +450,7 @@ static const struct ieee80211_ops mac80211_hwsim_ops =
.config_interface = mac80211_hwsim_config_interface,
.bss_info_changed = mac80211_hwsim_bss_info_changed,
.sta_notify = mac80211_hwsim_sta_notify,
.set_tim = mac80211_hwsim_set_tim,
};
@ -510,6 +553,7 @@ static int __init init_mac80211_hwsim(void)
/* 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, hwsim_channels, sizeof(hwsim_channels));
memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));