From 7ece9c372b21635120e7ab5ea3fc41ce9892ead8 Mon Sep 17 00:00:00 2001 From: Sara Sharon Date: Wed, 16 Jan 2019 21:26:25 +0200 Subject: cfg80211: make BSSID generation function inline This will enable reuse by mac80211. Signed-off-by: Sara Sharon Signed-off-by: Johannes Berg --- include/net/cfg80211.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'include/net/cfg80211.h') diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 67aeb7199617..c33ebc41d797 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -5461,6 +5461,29 @@ cfg80211_inform_bss_frame(struct wiphy *wiphy, return cfg80211_inform_bss_frame_data(wiphy, &data, mgmt, len, gfp); } +/** + * cfg80211_gen_new_bssid - generate a nontransmitted BSSID for multi-BSSID + * @bssid: transmitter BSSID + * @max_bssid: max BSSID indicator, taken from Multiple BSSID element + * @mbssid_index: BSSID index, taken from Multiple BSSID index element + * @new_bssid_addr: address of the resulting BSSID + */ +static inline void cfg80211_gen_new_bssid(const u8 *bssid, u8 max_bssid, + u8 mbssid_index, u8 *new_bssid_addr) +{ + u64 bssid_tmp, new_bssid; + u64 lsb_n; + + bssid_tmp = ether_addr_to_u64(bssid); + + lsb_n = bssid_tmp & ((1 << max_bssid) - 1); + new_bssid = bssid_tmp; + new_bssid &= ~((1 << max_bssid) - 1); + new_bssid |= (lsb_n + mbssid_index) % (1 << max_bssid); + + u64_to_ether_addr(new_bssid, new_bssid_addr); +} + /** * enum cfg80211_bss_frame_type - frame type that the BSS data came from * @CFG80211_BSS_FTYPE_UNKNOWN: driver doesn't know whether the data is -- cgit v1.2.3