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mac80211: Send control port frames over nl80211

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If userspace requested control port frames to go over 80211, then do so.
The control packets are intercepted just prior to delivery of the packet
to the underlying network device.

Pre-authentication type frames (protocol: 0x88c7) are also forwarded
over nl80211.

Signed-off-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Denis Kenzior 2018-03-26 12:52:51 -05:00 committed by Johannes Berg
parent 9118064914
commit 018f6fbf54
7 changed files with 42 additions and 5 deletions
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6
net/mac80211/cfg.c
View file

@ -926,6 +926,8 @@ static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev,
*/
sdata->control_port_protocol = params->crypto.control_port_ethertype;
sdata->control_port_no_encrypt = params->crypto.control_port_no_encrypt;
sdata->control_port_over_nl80211 =
params->crypto.control_port_over_nl80211;
sdata->encrypt_headroom = ieee80211_cs_headroom(sdata->local,
&params->crypto,
sdata->vif.type);
@ -935,6 +937,8 @@ static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev,
params->crypto.control_port_ethertype;
vlan->control_port_no_encrypt =
params->crypto.control_port_no_encrypt;
vlan->control_port_over_nl80211 =
params->crypto.control_port_over_nl80211;
vlan->encrypt_headroom =
ieee80211_cs_headroom(sdata->local,
&params->crypto,
@ -2020,6 +2024,8 @@ static int ieee80211_join_mesh(struct wiphy *wiphy, struct net_device *dev,
if (err)
return err;
sdata->control_port_over_nl80211 = setup->control_port_over_nl80211;
/* can mesh use other SMPS modes? */
sdata->smps_mode = IEEE80211_SMPS_OFF;
sdata->needed_rx_chains = sdata->local->rx_chains;

1
net/mac80211/ibss.c
View file

@ -1844,6 +1844,7 @@ int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
sdata->smps_mode = IEEE80211_SMPS_OFF;
sdata->needed_rx_chains = local->rx_chains;
sdata->control_port_over_nl80211 = params->control_port_over_nl80211;
ieee80211_queue_work(&local->hw, &sdata->work);

1
net/mac80211/ieee80211_i.h
View file

@ -900,6 +900,7 @@ struct ieee80211_sub_if_data {
u16 sequence_number;
__be16 control_port_protocol;
bool control_port_no_encrypt;
bool control_port_over_nl80211;
int encrypt_headroom;
atomic_t num_tx_queued;

2
net/mac80211/iface.c
View file

@ -519,6 +519,8 @@ int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
master->control_port_protocol;
sdata->control_port_no_encrypt =
master->control_port_no_encrypt;
sdata->control_port_over_nl80211 =
master->control_port_over_nl80211;
sdata->vif.cab_queue = master->vif.cab_queue;
memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
sizeof(sdata->vif.hw_queue));

2
net/mac80211/main.c
View file

@ -554,6 +554,8 @@ struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
NL80211_FEATURE_USERSPACE_MPM |
NL80211_FEATURE_FULL_AP_CLIENT_STATE;
wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
wiphy_ext_feature_set(wiphy,
NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
if (!ops->hw_scan)
wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |

2
net/mac80211/mlme.c
View file

@ -4855,6 +4855,8 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
sdata->control_port_protocol = req->crypto.control_port_ethertype;
sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
sdata->control_port_over_nl80211 =
req->crypto.control_port_over_nl80211;
sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
sdata->vif.type);

33
net/mac80211/rx.c
View file

@ -2245,6 +2245,32 @@ static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc)
return true;
}
static void ieee80211_deliver_skb_to_local_stack(struct sk_buff *skb,
struct ieee80211_rx_data *rx)
{
struct ieee80211_sub_if_data *sdata = rx->sdata;
struct net_device *dev = sdata->dev;
if (unlikely((skb->protocol == sdata->control_port_protocol ||
skb->protocol == cpu_to_be16(ETH_P_PREAUTH)) &&
sdata->control_port_over_nl80211)) {
struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
bool noencrypt = status->flag & RX_FLAG_DECRYPTED;
struct ethhdr *ehdr = eth_hdr(skb);
cfg80211_rx_control_port(dev, skb->data, skb->len,
ehdr->h_source,
be16_to_cpu(skb->protocol), noencrypt);
dev_kfree_skb(skb);
} else {
/* deliver to local stack */
if (rx->napi)
napi_gro_receive(rx->napi, skb);
else
netif_receive_skb(skb);
}
}
/*
* requires that rx->skb is a frame with ethernet header
*/
@ -2329,13 +2355,10 @@ ieee80211_deliver_skb(struct ieee80211_rx_data *rx)
#endif
if (skb) {
/* deliver to local stack */
skb->protocol = eth_type_trans(skb, dev);
memset(skb->cb, 0, sizeof(skb->cb));
if (rx->napi)
napi_gro_receive(rx->napi, skb);
else
netif_receive_skb(skb);
ieee80211_deliver_skb_to_local_stack(skb, rx);
}
if (xmit_skb) {