diff options
| -rw-r--r-- | include/net/cfg80211.h | 11 | ||||
| -rw-r--r-- | net/wireless/scan.c | 41 |
2 files changed, 37 insertions, 15 deletions
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 02737dde06d9..241b29b0796e 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -6377,6 +6377,17 @@ static inline void cfg80211_gen_new_bssid(const u8 *bssid, u8 max_bssid, } /** + * cfg80211_get_ies_channel_number - returns the channel number from ies + * @ie: IEs + * @ielen: length of IEs + * @band: enum nl80211_band of the channel + * + * Returns the channel number, or -1 if none could be determined. + */ +int cfg80211_get_ies_channel_number(const u8 *ie, size_t ielen, + enum nl80211_band band); + +/** * cfg80211_is_element_inherited - returns if element ID should be inherited * @element: element to check * @non_inherit_element: non inheritance element diff --git a/net/wireless/scan.c b/net/wireless/scan.c index 0273f20291c4..e4f79b23f7f6 100644 --- a/net/wireless/scan.c +++ b/net/wireless/scan.c @@ -1791,25 +1791,13 @@ cfg80211_bss_update(struct cfg80211_registered_device *rdev, return NULL; } -/* - * Update RX channel information based on the available frame payload - * information. This is mainly for the 2.4 GHz band where frames can be received - * from neighboring channels and the Beacon frames use the DSSS Parameter Set - * element to indicate the current (transmitting) channel, but this might also - * be needed on other bands if RX frequency does not match with the actual - * operating channel of a BSS. - */ -static struct ieee80211_channel * -cfg80211_get_bss_channel(struct wiphy *wiphy, const u8 *ie, size_t ielen, - struct ieee80211_channel *channel, - enum nl80211_bss_scan_width scan_width) +int cfg80211_get_ies_channel_number(const u8 *ie, size_t ielen, + enum nl80211_band band) { const u8 *tmp; - u32 freq; int channel_number = -1; - struct ieee80211_channel *alt_channel; - if (channel->band == NL80211_BAND_S1GHZ) { + if (band == NL80211_BAND_S1GHZ) { tmp = cfg80211_find_ie(WLAN_EID_S1G_OPERATION, ie, ielen); if (tmp && tmp[1] >= sizeof(struct ieee80211_s1g_oper_ie)) { struct ieee80211_s1g_oper_ie *s1gop = (void *)(tmp + 2); @@ -1830,6 +1818,29 @@ cfg80211_get_bss_channel(struct wiphy *wiphy, const u8 *ie, size_t ielen, } } + return channel_number; +} +EXPORT_SYMBOL(cfg80211_get_ies_channel_number); + +/* + * Update RX channel information based on the available frame payload + * information. This is mainly for the 2.4 GHz band where frames can be received + * from neighboring channels and the Beacon frames use the DSSS Parameter Set + * element to indicate the current (transmitting) channel, but this might also + * be needed on other bands if RX frequency does not match with the actual + * operating channel of a BSS. + */ +static struct ieee80211_channel * +cfg80211_get_bss_channel(struct wiphy *wiphy, const u8 *ie, size_t ielen, + struct ieee80211_channel *channel, + enum nl80211_bss_scan_width scan_width) +{ + u32 freq; + int channel_number; + struct ieee80211_channel *alt_channel; + + channel_number = cfg80211_get_ies_channel_number(ie, ielen, channel->band); + if (channel_number < 0) { /* No channel information in frame payload */ return channel; |