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Diffstat (limited to 'net/mac80211/util.c')
-rw-r--r--net/mac80211/util.c132
1 files changed, 70 insertions, 62 deletions
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 5a0564e1dbd6..5e631ce98d7e 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -22,6 +22,7 @@
#include <linux/bitmap.h>
#include <net/net_namespace.h>
#include <net/cfg80211.h>
+#include <net/rtnetlink.h>
#include "ieee80211_i.h"
#include "ieee80211_rate.h"
@@ -39,10 +40,6 @@ const unsigned char rfc1042_header[] =
const unsigned char bridge_tunnel_header[] =
{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
-/* No encapsulation header if EtherType < 0x600 (=length) */
-static const unsigned char eapol_header[] =
- { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00, 0x88, 0x8e };
-
static int rate_list_match(const int *rate_list, int rate)
{
@@ -130,17 +127,21 @@ void ieee80211_prepare_rates(struct ieee80211_local *local,
}
}
-u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len)
+u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
+ enum ieee80211_if_types type)
{
u16 fc;
- if (len < 24)
+ /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
+ if (len < 16)
return NULL;
fc = le16_to_cpu(hdr->frame_control);
switch (fc & IEEE80211_FCTL_FTYPE) {
case IEEE80211_FTYPE_DATA:
+ if (len < 24) /* drop incorrect hdr len (data) */
+ return NULL;
switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
case IEEE80211_FCTL_TODS:
return hdr->addr1;
@@ -153,10 +154,24 @@ u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len)
}
break;
case IEEE80211_FTYPE_MGMT:
+ if (len < 24) /* drop incorrect hdr len (mgmt) */
+ return NULL;
return hdr->addr3;
case IEEE80211_FTYPE_CTL:
if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)
return hdr->addr1;
+ else if ((fc & IEEE80211_FCTL_STYPE) ==
+ IEEE80211_STYPE_BACK_REQ) {
+ switch (type) {
+ case IEEE80211_IF_TYPE_STA:
+ return hdr->addr2;
+ case IEEE80211_IF_TYPE_AP:
+ case IEEE80211_IF_TYPE_VLAN:
+ return hdr->addr1;
+ default:
+ return NULL;
+ }
+ }
else
return NULL;
}
@@ -217,31 +232,6 @@ int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
}
EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
-int ieee80211_is_eapol(const struct sk_buff *skb)
-{
- const struct ieee80211_hdr *hdr;
- u16 fc;
- int hdrlen;
-
- if (unlikely(skb->len < 10))
- return 0;
-
- hdr = (const struct ieee80211_hdr *) skb->data;
- fc = le16_to_cpu(hdr->frame_control);
-
- if (unlikely(!WLAN_FC_DATA_PRESENT(fc)))
- return 0;
-
- hdrlen = ieee80211_get_hdrlen(fc);
-
- if (unlikely(skb->len >= hdrlen + sizeof(eapol_header) &&
- memcmp(skb->data + hdrlen, eapol_header,
- sizeof(eapol_header)) == 0))
- return 1;
-
- return 0;
-}
-
void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
@@ -312,45 +302,35 @@ int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
}
/* Exported duration function for driver use */
-__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, int if_id,
+__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
size_t frame_len, int rate)
{
struct ieee80211_local *local = hw_to_local(hw);
- struct net_device *bdev = dev_get_by_index(&init_net, if_id);
- struct ieee80211_sub_if_data *sdata;
+ struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
u16 dur;
int erp;
- if (unlikely(!bdev))
- return 0;
-
- sdata = IEEE80211_DEV_TO_SUB_IF(bdev);
erp = ieee80211_is_erp_rate(hw->conf.phymode, rate);
- dur = ieee80211_frame_duration(local, frame_len, rate,
- erp, sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE);
+ dur = ieee80211_frame_duration(local, frame_len, rate, erp,
+ sdata->bss_conf.use_short_preamble);
- dev_put(bdev);
return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_generic_frame_duration);
-__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, int if_id,
- size_t frame_len,
+__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif, size_t frame_len,
const struct ieee80211_tx_control *frame_txctl)
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_rate *rate;
- struct net_device *bdev = dev_get_by_index(&init_net, if_id);
- struct ieee80211_sub_if_data *sdata;
- int short_preamble;
+ struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+ bool short_preamble;
int erp;
u16 dur;
- if (unlikely(!bdev))
- return 0;
-
- sdata = IEEE80211_DEV_TO_SUB_IF(bdev);
- short_preamble = sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE;
+ short_preamble = sdata->bss_conf.use_short_preamble;
rate = frame_txctl->rts_rate;
erp = !!(rate->flags & IEEE80211_RATE_ERP);
@@ -365,28 +345,23 @@ __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, int if_id,
dur += ieee80211_frame_duration(local, 10, rate->rate,
erp, short_preamble);
- dev_put(bdev);
return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_rts_duration);
-__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, int if_id,
+__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
size_t frame_len,
const struct ieee80211_tx_control *frame_txctl)
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_rate *rate;
- struct net_device *bdev = dev_get_by_index(&init_net, if_id);
- struct ieee80211_sub_if_data *sdata;
- int short_preamble;
+ struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+ bool short_preamble;
int erp;
u16 dur;
- if (unlikely(!bdev))
- return 0;
-
- sdata = IEEE80211_DEV_TO_SUB_IF(bdev);
- short_preamble = sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE;
+ short_preamble = sdata->bss_conf.use_short_preamble;
rate = frame_txctl->rts_rate;
erp = !!(rate->flags & IEEE80211_RATE_ERP);
@@ -400,7 +375,6 @@ __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, int if_id,
erp, short_preamble);
}
- dev_put(bdev);
return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_ctstoself_duration);
@@ -484,3 +458,37 @@ void ieee80211_wake_queues(struct ieee80211_hw *hw)
ieee80211_wake_queue(hw, i);
}
EXPORT_SYMBOL(ieee80211_wake_queues);
+
+void ieee80211_iterate_active_interfaces(
+ struct ieee80211_hw *hw,
+ void (*iterator)(void *data, u8 *mac,
+ struct ieee80211_vif *vif),
+ void *data)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ struct ieee80211_sub_if_data *sdata;
+
+ rcu_read_lock();
+
+ list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+ switch (sdata->vif.type) {
+ case IEEE80211_IF_TYPE_INVALID:
+ case IEEE80211_IF_TYPE_MNTR:
+ case IEEE80211_IF_TYPE_VLAN:
+ continue;
+ case IEEE80211_IF_TYPE_AP:
+ case IEEE80211_IF_TYPE_STA:
+ case IEEE80211_IF_TYPE_IBSS:
+ case IEEE80211_IF_TYPE_WDS:
+ break;
+ }
+ if (sdata->dev == local->mdev)
+ continue;
+ if (netif_running(sdata->dev))
+ iterator(data, sdata->dev->dev_addr,
+ &sdata->vif);
+ }
+
+ rcu_read_unlock();
+}
+EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-05 10:29:10 +0000