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cfg80211/mac80211: make ieee80211_send_layer2_update a public function

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commit 30ca1aa536211f5ac3de0173513a7a99a98a97f3 upstream.

Make ieee80211_send_layer2_update() a common function so other drivers
can re-use it.

Signed-off-by: Dedy Lansky <dlansky@codeaurora.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
[bwh: Backported to 4.19 as dependency of commit 3e493173b784
 "mac80211: Do not send Layer 2 Update frame before authorization"]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dedy Lansky 2018-07-29 14:59:16 +03:00 committed by Greg Kroah-Hartman
parent e5caf1d5ff
commit 85fa006ff2
3 changed files with 58 additions and 46 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
include/net/cfg80211.h
View File

@ -4733,6 +4733,17 @@ static inline const u8 *cfg80211_find_ext_ie(u8 ext_eid, const u8 *ies, int len)
const u8 *cfg80211_find_vendor_ie(unsigned int oui, int oui_type,
const u8 *ies, int len);
/**
* cfg80211_send_layer2_update - send layer 2 update frame
*
* @dev: network device
* @addr: STA MAC address
*
* Wireless drivers can use this function to update forwarding tables in bridge
* devices upon STA association.
*/
void cfg80211_send_layer2_update(struct net_device *dev, const u8 *addr);
/**
* DOC: Regulatory enforcement infrastructure
*

48
net/mac80211/cfg.c
View File

@ -1096,50 +1096,6 @@ static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
return 0;
}
/* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
struct iapp_layer2_update {
u8 da[ETH_ALEN]; /* broadcast */
u8 sa[ETH_ALEN]; /* STA addr */
__be16 len; /* 6 */
u8 dsap; /* 0 */
u8 ssap; /* 0 */
u8 control;
u8 xid_info[3];
} __packed;
static void ieee80211_send_layer2_update(struct sta_info *sta)
{
struct iapp_layer2_update *msg;
struct sk_buff *skb;
/* Send Level 2 Update Frame to update forwarding tables in layer 2
* bridge devices */
skb = dev_alloc_skb(sizeof(*msg));
if (!skb)
return;
msg = skb_put(skb, sizeof(*msg));
/* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
* Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
eth_broadcast_addr(msg->da);
memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
msg->len = htons(6);
msg->dsap = 0;
msg->ssap = 0x01; /* NULL LSAP, CR Bit: Response */
msg->control = 0xaf; /* XID response lsb.1111F101.
* F=0 (no poll command; unsolicited frame) */
msg->xid_info[0] = 0x81; /* XID format identifier */
msg->xid_info[1] = 1; /* LLC types/classes: Type 1 LLC */
msg->xid_info[2] = 0; /* XID sender's receive window size (RW) */
skb->dev = sta->sdata->dev;
skb->protocol = eth_type_trans(skb, sta->sdata->dev);
memset(skb->cb, 0, sizeof(skb->cb));
netif_rx_ni(skb);
}
static int sta_apply_auth_flags(struct ieee80211_local *local,
struct sta_info *sta,
u32 mask, u32 set)
@ -1508,7 +1464,7 @@ static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
}
if (layer2_update)
ieee80211_send_layer2_update(sta);
cfg80211_send_layer2_update(sta->sdata->dev, sta->sta.addr);
rcu_read_unlock();
@ -1610,7 +1566,7 @@ static int ieee80211_change_station(struct wiphy *wiphy,
if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
ieee80211_vif_inc_num_mcast(sta->sdata);
ieee80211_send_layer2_update(sta);
cfg80211_send_layer2_update(sta->sdata->dev, sta->sta.addr);
}
err = sta_apply_parameters(local, sta, params);

45
net/wireless/util.c
View File

@ -1919,3 +1919,48 @@ bool cfg80211_iftype_allowed(struct wiphy *wiphy, enum nl80211_iftype iftype,
return false;
}
EXPORT_SYMBOL(cfg80211_iftype_allowed);
/* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
struct iapp_layer2_update {
u8 da[ETH_ALEN]; /* broadcast */
u8 sa[ETH_ALEN]; /* STA addr */
__be16 len; /* 6 */
u8 dsap; /* 0 */
u8 ssap; /* 0 */
u8 control;
u8 xid_info[3];
} __packed;
void cfg80211_send_layer2_update(struct net_device *dev, const u8 *addr)
{
struct iapp_layer2_update *msg;
struct sk_buff *skb;
/* Send Level 2 Update Frame to update forwarding tables in layer 2
* bridge devices */
skb = dev_alloc_skb(sizeof(*msg));
if (!skb)
return;
msg = skb_put(skb, sizeof(*msg));
/* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
* Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
eth_broadcast_addr(msg->da);
ether_addr_copy(msg->sa, addr);
msg->len = htons(6);
msg->dsap = 0;
msg->ssap = 0x01; /* NULL LSAP, CR Bit: Response */
msg->control = 0xaf; /* XID response lsb.1111F101.
* F=0 (no poll command; unsolicited frame) */
msg->xid_info[0] = 0x81; /* XID format identifier */
msg->xid_info[1] = 1; /* LLC types/classes: Type 1 LLC */
msg->xid_info[2] = 0; /* XID sender's receive window size (RW) */
skb->dev = dev;
skb->protocol = eth_type_trans(skb, dev);
memset(skb->cb, 0, sizeof(skb->cb));
netif_rx_ni(skb);
}
EXPORT_SYMBOL(cfg80211_send_layer2_update);