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cfg80211/mac80211: report signal strength for mgmt frames 

Add the signal strength (in dBm only for now) to
frames that are received via nl80211's various
frame APIs.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Kalle Valo <kvalo@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2012-03-05 22:18:41 +01:00 committed by John W. Linville
parent 769009b89d
commit 804483e907
7 changed files with 39 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/net/wireless/ath/ath6kl/wmi.c
View File

@ -556,7 +556,8 @@ static int ath6kl_wmi_rx_probe_req_event_rx(struct wmi *wmi, u8 *datap, int len,
dlen, freq, vif->probe_req_report); dlen, freq, vif->probe_req_report);
if (vif->probe_req_report || vif->nw_type == AP_NETWORK) if (vif->probe_req_report || vif->nw_type == AP_NETWORK)
cfg80211_rx_mgmt(vif->ndev, freq, ev->data, dlen, GFP_ATOMIC); cfg80211_rx_mgmt(vif->ndev, freq, 0,
ev->data, dlen, GFP_ATOMIC);
return 0; return 0;
} }
@ -595,7 +596,8 @@ static int ath6kl_wmi_rx_action_event_rx(struct wmi *wmi, u8 *datap, int len,
return -EINVAL; return -EINVAL;
} }
ath6kl_dbg(ATH6KL_DBG_WMI, "rx_action: len=%u freq=%u\n", dlen, freq); ath6kl_dbg(ATH6KL_DBG_WMI, "rx_action: len=%u freq=%u\n", dlen, freq);
cfg80211_rx_mgmt(vif->ndev, freq, ev->data, dlen, GFP_ATOMIC); cfg80211_rx_mgmt(vif->ndev, freq, 0,
ev->data, dlen, GFP_ATOMIC);
return 0; return 0;
} }

6
include/linux/nl80211.h
View File

@ -1203,6 +1203,10 @@ enum nl80211_commands {
* the list. This needs to be used when the driver advertises the * the list. This needs to be used when the driver advertises the
* capability to timeout the stations. * capability to timeout the stations.
* *
* @NL80211_ATTR_RX_SIGNAL_DBM: signal strength in dBm (as a 32-bit int);
* this attribute is (depending on the driver capabilities) added to
* received frames indicated with %NL80211_CMD_FRAME.
*
* @NL80211_ATTR_MAX: highest attribute number currently defined * @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use * @__NL80211_ATTR_AFTER_LAST: internal use
*/ */
@ -1450,6 +1454,8 @@ enum nl80211_attrs {
NL80211_ATTR_INACTIVITY_TIMEOUT, NL80211_ATTR_INACTIVITY_TIMEOUT,
NL80211_ATTR_RX_SIGNAL_DBM,
/* add attributes here, update the policy in nl80211.c */ /* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST, __NL80211_ATTR_AFTER_LAST,

8
include/net/cfg80211.h
View File

@ -3189,6 +3189,7 @@ void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp);
* cfg80211_rx_mgmt - notification of received, unprocessed management frame * cfg80211_rx_mgmt - notification of received, unprocessed management frame
* @dev: network device * @dev: network device
* @freq: Frequency on which the frame was received in MHz * @freq: Frequency on which the frame was received in MHz
* @sig_dbm: signal strength in mBm, or 0 if unknown
* @buf: Management frame (header + body) * @buf: Management frame (header + body)
* @len: length of the frame data * @len: length of the frame data
* @gfp: context flags * @gfp: context flags
@ -3201,8 +3202,8 @@ void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp);
* This function is called whenever an Action frame is received for a station * This function is called whenever an Action frame is received for a station
* mode interface, but is not processed in kernel. * mode interface, but is not processed in kernel.
*/ */
bool cfg80211_rx_mgmt(struct net_device *dev, int freq, const u8 *buf, bool cfg80211_rx_mgmt(struct net_device *dev, int freq, int sig_dbm,
size_t len, gfp_t gfp); const u8 *buf, size_t len, gfp_t gfp);
/** /**
* cfg80211_mgmt_tx_status - notification of TX status for management frame * cfg80211_mgmt_tx_status - notification of TX status for management frame
@ -3315,6 +3316,7 @@ void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
* @frame: the frame * @frame: the frame
* @len: length of the frame * @len: length of the frame
* @freq: frequency the frame was received on * @freq: frequency the frame was received on
* @sig_dbm: signal strength in mBm, or 0 if unknown
* @gfp: allocation flags * @gfp: allocation flags
* *
* Use this function to report to userspace when a beacon was * Use this function to report to userspace when a beacon was
@ -3323,7 +3325,7 @@ void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
*/ */
void cfg80211_report_obss_beacon(struct wiphy *wiphy, void cfg80211_report_obss_beacon(struct wiphy *wiphy,
const u8 *frame, size_t len, const u8 *frame, size_t len,
int freq, gfp_t gfp); int freq, int sig_dbm, gfp_t gfp);
/* /*
* cfg80211_can_beacon_sec_chan - test if ht40 on extension channel can be used * cfg80211_can_beacon_sec_chan - test if ht40 on extension channel can be used

13
net/mac80211/rx.c
View File

@ -2188,9 +2188,14 @@ ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx)
if (rx->sdata->vif.type == NL80211_IFTYPE_AP && if (rx->sdata->vif.type == NL80211_IFTYPE_AP &&
ieee80211_is_beacon(mgmt->frame_control) && ieee80211_is_beacon(mgmt->frame_control) &&
!(rx->flags & IEEE80211_RX_BEACON_REPORTED)) { !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) {
int sig = 0;
if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
sig = status->signal;
cfg80211_report_obss_beacon(rx->local->hw.wiphy, cfg80211_report_obss_beacon(rx->local->hw.wiphy,
rx->skb->data, rx->skb->len, rx->skb->data, rx->skb->len,
status->freq, GFP_ATOMIC); status->freq, sig, GFP_ATOMIC);
rx->flags |= IEEE80211_RX_BEACON_REPORTED; rx->flags |= IEEE80211_RX_BEACON_REPORTED;
} }
@ -2414,6 +2419,7 @@ static ieee80211_rx_result debug_noinline
ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx) ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx)
{ {
struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
int sig = 0;
/* skip known-bad action frames and return them in the next handler */ /* skip known-bad action frames and return them in the next handler */
if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM)
@ -2426,7 +2432,10 @@ ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx)
* it transmitted were processed or returned. * it transmitted were processed or returned.
*/ */
if (cfg80211_rx_mgmt(rx->sdata->dev, status->freq, if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
sig = status->signal;
if (cfg80211_rx_mgmt(rx->sdata->dev, status->freq, sig,
rx->skb->data, rx->skb->len, rx->skb->data, rx->skb->len,
GFP_ATOMIC)) { GFP_ATOMIC)) {
if (rx->sta) if (rx->sta)

7
net/wireless/mlme.c
View File

@ -814,8 +814,8 @@ int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
cookie); cookie);
} }
bool cfg80211_rx_mgmt(struct net_device *dev, int freq, const u8 *buf, bool cfg80211_rx_mgmt(struct net_device *dev, int freq, int sig_mbm,
size_t len, gfp_t gfp) const u8 *buf, size_t len, gfp_t gfp)
{ {
struct wireless_dev *wdev = dev->ieee80211_ptr; struct wireless_dev *wdev = dev->ieee80211_ptr;
struct wiphy *wiphy = wdev->wiphy; struct wiphy *wiphy = wdev->wiphy;
@ -854,7 +854,8 @@ bool cfg80211_rx_mgmt(struct net_device *dev, int freq, const u8 *buf,
/* found match! */ /* found match! */
/* Indicate the received Action frame to user space */ /* Indicate the received Action frame to user space */
if (nl80211_send_mgmt(rdev, dev, reg->nlpid, freq, if (nl80211_send_mgmt(rdev, dev, reg->nlpid,
freq, sig_mbm,
buf, len, gfp)) buf, len, gfp))
continue; continue;

9
net/wireless/nl80211.c
View File

@ -7686,7 +7686,8 @@ bool nl80211_unexpected_4addr_frame(struct net_device *dev,
int nl80211_send_mgmt(struct cfg80211_registered_device *rdev, int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
struct net_device *netdev, u32 nlpid, struct net_device *netdev, u32 nlpid,
int freq, const u8 *buf, size_t len, gfp_t gfp) int freq, int sig_dbm,
const u8 *buf, size_t len, gfp_t gfp)
{ {
struct sk_buff *msg; struct sk_buff *msg;
void *hdr; void *hdr;
@ -7704,6 +7705,8 @@ int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq); NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
if (sig_dbm)
NLA_PUT_U32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm);
NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf); NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
genlmsg_end(msg, hdr); genlmsg_end(msg, hdr);
@ -7965,7 +7968,7 @@ EXPORT_SYMBOL(cfg80211_probe_status);
void cfg80211_report_obss_beacon(struct wiphy *wiphy, void cfg80211_report_obss_beacon(struct wiphy *wiphy,
const u8 *frame, size_t len, const u8 *frame, size_t len,
int freq, gfp_t gfp) int freq, int sig_dbm, gfp_t gfp)
{ {
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
struct sk_buff *msg; struct sk_buff *msg;
@ -7988,6 +7991,8 @@ void cfg80211_report_obss_beacon(struct wiphy *wiphy,
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
if (freq) if (freq)
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq); NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
if (sig_dbm)
NLA_PUT_U32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm);
NLA_PUT(msg, NL80211_ATTR_FRAME, len, frame); NLA_PUT(msg, NL80211_ATTR_FRAME, len, frame);
genlmsg_end(msg, hdr); genlmsg_end(msg, hdr);

3
net/wireless/nl80211.h
View File

@ -92,7 +92,8 @@ void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
gfp_t gfp); gfp_t gfp);
int nl80211_send_mgmt(struct cfg80211_registered_device *rdev, int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
struct net_device *netdev, u32 nlpid, int freq, struct net_device *netdev, u32 nlpid,
int freq, int sig_dbm,
const u8 *buf, size_t len, gfp_t gfp); const u8 *buf, size_t len, gfp_t gfp);
void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev, void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
struct net_device *netdev, u64 cookie, struct net_device *netdev, u64 cookie,