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nl80211: add scan width to bss and scan request structs

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To allow scanning and working with 5 MHz and 10 MHz BSS, extend the
inform bss commands and add wrappers to take 5 and 10 MHz bss into
account.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
This commit is contained in:
Simon Wunderlich 2013-07-08 16:55:49 +02:00 committed by Johannes Berg
parent be29b99a9b
commit dcd6eac1f3
5 changed files with 97 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
include/net/cfg80211.h
View File

@ -1285,6 +1285,7 @@ struct cfg80211_ssid {
* @n_ssids: number of SSIDs
* @channels: channels to scan on.
* @n_channels: total number of channels to scan
* @scan_width: channel width for scanning
* @ie: optional information element(s) to add into Probe Request or %NULL
* @ie_len: length of ie in octets
* @flags: bit field of flags controlling operation
@ -1300,6 +1301,7 @@ struct cfg80211_scan_request {
struct cfg80211_ssid *ssids;
int n_ssids;
u32 n_channels;
enum nl80211_bss_scan_width scan_width;
const u8 *ie;
size_t ie_len;
u32 flags;
@ -1333,6 +1335,7 @@ struct cfg80211_match_set {
* @ssids: SSIDs to scan for (passed in the probe_reqs in active scans)
* @n_ssids: number of SSIDs
* @n_channels: total number of channels to scan
* @scan_width: channel width for scanning
* @interval: interval between each scheduled scan cycle
* @ie: optional information element(s) to add into Probe Request or %NULL
* @ie_len: length of ie in octets
@ -1352,6 +1355,7 @@ struct cfg80211_sched_scan_request {
struct cfg80211_ssid *ssids;
int n_ssids;
u32 n_channels;
enum nl80211_bss_scan_width scan_width;
u32 interval;
const u8 *ie;
size_t ie_len;
@ -1403,6 +1407,7 @@ struct cfg80211_bss_ies {
* for use in scan results and similar.
*
* @channel: channel this BSS is on
* @scan_width: width of the control channel
* @bssid: BSSID of the BSS
* @beacon_interval: the beacon interval as from the frame
* @capability: the capability field in host byte order
@ -1424,6 +1429,7 @@ struct cfg80211_bss_ies {
*/
struct cfg80211_bss {
struct ieee80211_channel *channel;
enum nl80211_bss_scan_width scan_width;
const struct cfg80211_bss_ies __rcu *ies;
const struct cfg80211_bss_ies __rcu *beacon_ies;
@ -3438,10 +3444,11 @@ void cfg80211_sched_scan_results(struct wiphy *wiphy);
void cfg80211_sched_scan_stopped(struct wiphy *wiphy);
/**
* cfg80211_inform_bss_frame - inform cfg80211 of a received BSS frame
* cfg80211_inform_bss_width_frame - inform cfg80211 of a received BSS frame
*
* @wiphy: the wiphy reporting the BSS
* @channel: The channel the frame was received on
* @scan_width: width of the control channel
* @mgmt: the management frame (probe response or beacon)
* @len: length of the management frame
* @signal: the signal strength, type depends on the wiphy's signal_type
@ -3454,16 +3461,29 @@ void cfg80211_sched_scan_stopped(struct wiphy *wiphy);
* Or %NULL on error.
*/
struct cfg80211_bss * __must_check
cfg80211_inform_bss_width_frame(struct wiphy *wiphy,
struct ieee80211_channel *channel,
enum nl80211_bss_scan_width scan_width,
struct ieee80211_mgmt *mgmt, size_t len,
s32 signal, gfp_t gfp);
static inline struct cfg80211_bss * __must_check
cfg80211_inform_bss_frame(struct wiphy *wiphy,
struct ieee80211_channel *channel,
struct ieee80211_mgmt *mgmt, size_t len,
s32 signal, gfp_t gfp);
s32 signal, gfp_t gfp)
{
return cfg80211_inform_bss_width_frame(wiphy, channel,
NL80211_BSS_CHAN_WIDTH_20,
mgmt, len, signal, gfp);
}
/**
* cfg80211_inform_bss - inform cfg80211 of a new BSS
*
* @wiphy: the wiphy reporting the BSS
* @channel: The channel the frame was received on
* @scan_width: width of the control channel
* @bssid: the BSSID of the BSS
* @tsf: the TSF sent by the peer in the beacon/probe response (or 0)
* @capability: the capability field sent by the peer
@ -3480,11 +3500,26 @@ cfg80211_inform_bss_frame(struct wiphy *wiphy,
* Or %NULL on error.
*/
struct cfg80211_bss * __must_check
cfg80211_inform_bss_width(struct wiphy *wiphy,
struct ieee80211_channel *channel,
enum nl80211_bss_scan_width scan_width,
const u8 *bssid, u64 tsf, u16 capability,
u16 beacon_interval, const u8 *ie, size_t ielen,
s32 signal, gfp_t gfp);
static inline struct cfg80211_bss * __must_check
cfg80211_inform_bss(struct wiphy *wiphy,
struct ieee80211_channel *channel,
const u8 *bssid, u64 tsf, u16 capability,
u16 beacon_interval, const u8 *ie, size_t ielen,
s32 signal, gfp_t gfp);
s32 signal, gfp_t gfp)
{
return cfg80211_inform_bss_width(wiphy, channel,
NL80211_BSS_CHAN_WIDTH_20,
bssid, tsf, capability,
beacon_interval, ie, ielen, signal,
gfp);
}
struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy,
struct ieee80211_channel *channel,
@ -3530,6 +3565,19 @@ void cfg80211_put_bss(struct wiphy *wiphy, struct cfg80211_bss *bss);
*/
void cfg80211_unlink_bss(struct wiphy *wiphy, struct cfg80211_bss *bss);
static inline enum nl80211_bss_scan_width
cfg80211_chandef_to_scan_width(const struct cfg80211_chan_def *chandef)
{
switch (chandef->width) {
case NL80211_CHAN_WIDTH_5:
return NL80211_BSS_CHAN_WIDTH_5;
case NL80211_CHAN_WIDTH_10:
return NL80211_BSS_CHAN_WIDTH_10;
default:
return NL80211_BSS_CHAN_WIDTH_20;
}
}
/**
* cfg80211_rx_mlme_mgmt - notification of processed MLME management frame
* @dev: network device

18
include/uapi/linux/nl80211.h
View File

@ -2807,6 +2807,21 @@ enum nl80211_chan_width {
NL80211_CHAN_WIDTH_10,
};
/**
* enum nl80211_bss_scan_width - control channel width for a BSS
*
* These values are used with the %NL80211_BSS_CHAN_WIDTH attribute.
*
* @NL80211_BSS_CHAN_WIDTH_20: control channel is 20 MHz wide or compatible
* @NL80211_BSS_CHAN_WIDTH_10: control channel is 10 MHz wide
* @NL80211_BSS_CHAN_WIDTH_5: control channel is 5 MHz wide
*/
enum nl80211_bss_scan_width {
NL80211_BSS_CHAN_WIDTH_20,
NL80211_BSS_CHAN_WIDTH_10,
NL80211_BSS_CHAN_WIDTH_5,
};
/**
* enum nl80211_bss - netlink attributes for a BSS
*
@ -2831,6 +2846,8 @@ enum nl80211_chan_width {
* @NL80211_BSS_BEACON_IES: binary attribute containing the raw information
* elements from a Beacon frame (bin); not present if no Beacon frame has
* yet been received
* @NL80211_BSS_CHAN_WIDTH: channel width of the control channel
* (u32, enum nl80211_bss_scan_width)
* @__NL80211_BSS_AFTER_LAST: internal
* @NL80211_BSS_MAX: highest BSS attribute
*/
@ -2847,6 +2864,7 @@ enum nl80211_bss {
NL80211_BSS_STATUS,
NL80211_BSS_SEEN_MS_AGO,
NL80211_BSS_BEACON_IES,
NL80211_BSS_CHAN_WIDTH,
/* keep last */
__NL80211_BSS_AFTER_LAST,

1
net/wireless/nl80211.c
View File

@ -5674,6 +5674,7 @@ static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
goto nla_put_failure;
if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
jiffies_to_msecs(jiffies - intbss->ts)))
goto nla_put_failure;

31
net/wireless/scan.c
View File

@ -651,6 +651,8 @@ static bool cfg80211_combine_bsses(struct cfg80211_registered_device *dev,
continue;
if (bss->pub.channel != new->pub.channel)
continue;
if (bss->pub.scan_width != new->pub.scan_width)
continue;
if (rcu_access_pointer(bss->pub.beacon_ies))
continue;
ies = rcu_access_pointer(bss->pub.ies);
@ -870,11 +872,12 @@ cfg80211_get_bss_channel(struct wiphy *wiphy, const u8 *ie, size_t ielen,
/* Returned bss is reference counted and must be cleaned up appropriately. */
struct cfg80211_bss*
cfg80211_inform_bss(struct wiphy *wiphy,
struct ieee80211_channel *channel,
const u8 *bssid, u64 tsf, u16 capability,
u16 beacon_interval, const u8 *ie, size_t ielen,
s32 signal, gfp_t gfp)
cfg80211_inform_bss_width(struct wiphy *wiphy,
struct ieee80211_channel *channel,
enum nl80211_bss_scan_width scan_width,
const u8 *bssid, u64 tsf, u16 capability,
u16 beacon_interval, const u8 *ie, size_t ielen,
s32 signal, gfp_t gfp)
{
struct cfg80211_bss_ies *ies;
struct cfg80211_internal_bss tmp = {}, *res;
@ -892,6 +895,7 @@ cfg80211_inform_bss(struct wiphy *wiphy,
memcpy(tmp.pub.bssid, bssid, ETH_ALEN);
tmp.pub.channel = channel;
tmp.pub.scan_width = scan_width;
tmp.pub.signal = signal;
tmp.pub.beacon_interval = beacon_interval;
tmp.pub.capability = capability;
@ -924,14 +928,15 @@ cfg80211_inform_bss(struct wiphy *wiphy,
/* cfg80211_bss_update gives us a referenced result */
return &res->pub;
}
EXPORT_SYMBOL(cfg80211_inform_bss);
EXPORT_SYMBOL(cfg80211_inform_bss_width);
/* Returned bss is reference counted and must be cleaned up appropriately. */
struct cfg80211_bss *
cfg80211_inform_bss_frame(struct wiphy *wiphy,
struct ieee80211_channel *channel,
struct ieee80211_mgmt *mgmt, size_t len,
s32 signal, gfp_t gfp)
cfg80211_inform_bss_width_frame(struct wiphy *wiphy,
struct ieee80211_channel *channel,
enum nl80211_bss_scan_width scan_width,
struct ieee80211_mgmt *mgmt, size_t len,
s32 signal, gfp_t gfp)
{
struct cfg80211_internal_bss tmp = {}, *res;
struct cfg80211_bss_ies *ies;
@ -941,7 +946,8 @@ cfg80211_inform_bss_frame(struct wiphy *wiphy,
BUILD_BUG_ON(offsetof(struct ieee80211_mgmt, u.probe_resp.variable) !=
offsetof(struct ieee80211_mgmt, u.beacon.variable));
trace_cfg80211_inform_bss_frame(wiphy, channel, mgmt, len, signal);
trace_cfg80211_inform_bss_width_frame(wiphy, channel, scan_width, mgmt,
len, signal);
if (WARN_ON(!mgmt))
return NULL;
@ -976,6 +982,7 @@ cfg80211_inform_bss_frame(struct wiphy *wiphy,
memcpy(tmp.pub.bssid, mgmt->bssid, ETH_ALEN);
tmp.pub.channel = channel;
tmp.pub.scan_width = scan_width;
tmp.pub.signal = signal;
tmp.pub.beacon_interval = le16_to_cpu(mgmt->u.probe_resp.beacon_int);
tmp.pub.capability = le16_to_cpu(mgmt->u.probe_resp.capab_info);
@ -991,7 +998,7 @@ cfg80211_inform_bss_frame(struct wiphy *wiphy,
/* cfg80211_bss_update gives us a referenced result */
return &res->pub;
}
EXPORT_SYMBOL(cfg80211_inform_bss_frame);
EXPORT_SYMBOL(cfg80211_inform_bss_width_frame);
void cfg80211_ref_bss(struct wiphy *wiphy, struct cfg80211_bss *pub)
{

12
net/wireless/trace.h
View File

@ -2391,26 +2391,30 @@ TRACE_EVENT(cfg80211_get_bss,
__entry->capa_mask, __entry->capa_val)
);
TRACE_EVENT(cfg80211_inform_bss_frame,
TRACE_EVENT(cfg80211_inform_bss_width_frame,
TP_PROTO(struct wiphy *wiphy, struct ieee80211_channel *channel,
enum nl80211_bss_scan_width scan_width,
struct ieee80211_mgmt *mgmt, size_t len,
s32 signal),
TP_ARGS(wiphy, channel, mgmt, len, signal),
TP_ARGS(wiphy, channel, scan_width, mgmt, len, signal),
TP_STRUCT__entry(
WIPHY_ENTRY
CHAN_ENTRY
__field(enum nl80211_bss_scan_width, scan_width)
__dynamic_array(u8, mgmt, len)
__field(s32, signal)
),
TP_fast_assign(
WIPHY_ASSIGN;
CHAN_ASSIGN(channel);
__entry->scan_width = scan_width;
if (mgmt)
memcpy(__get_dynamic_array(mgmt), mgmt, len);
__entry->signal = signal;
),
TP_printk(WIPHY_PR_FMT ", " CHAN_PR_FMT "signal: %d",
WIPHY_PR_ARG, CHAN_PR_ARG, __entry->signal)
TP_printk(WIPHY_PR_FMT ", " CHAN_PR_FMT "(scan_width: %d) signal: %d",
WIPHY_PR_ARG, CHAN_PR_ARG, __entry->scan_width,
__entry->signal)
);
DECLARE_EVENT_CLASS(cfg80211_bss_evt,