From c2a8f0ff9c6ca8d04adb68b7959a56a3cbb665b3 Mon Sep 17 00:00:00 2001 From: Ganapathi Bhat Date: Mon, 25 Jul 2016 21:21:07 +0530 Subject: [PATCH] mwifiex: support random MAC address for scanning This patch advertises RANDOM_MAC_ADDR feature to cfg80211. It allow the application to issue scan with a MAC address and mask. Random MACs are generated and used in probe requests sent for scanning until it is changed by the application or device is restarted. Signed-off-by: Ganapathi Bhat Signed-off-by: Amitkumar Karwar Signed-off-by: Kalle Valo --- drivers/net/wireless/marvell/mwifiex/cfg80211.c | 15 ++++++++++++++- drivers/net/wireless/marvell/mwifiex/fw.h | 7 +++++++ drivers/net/wireless/marvell/mwifiex/main.h | 1 + drivers/net/wireless/marvell/mwifiex/scan.c | 16 ++++++++++++++++ 4 files changed, 38 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/marvell/mwifiex/cfg80211.c b/drivers/net/wireless/marvell/mwifiex/cfg80211.c index a8ff969c95c2..871ad8a9868f 100644 --- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c +++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c @@ -2485,6 +2485,16 @@ mwifiex_cfg80211_scan(struct wiphy *wiphy, priv->scan_request = request; + if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) { + ether_addr_copy(priv->random_mac, request->mac_addr); + for (i = 0; i < ETH_ALEN; i++) { + priv->random_mac[i] &= request->mac_addr_mask[i]; + priv->random_mac[i] |= get_random_int() & + ~(request->mac_addr_mask[i]); + } + } + + ether_addr_copy(user_scan_cfg->random_mac, priv->random_mac); user_scan_cfg->num_ssids = request->n_ssids; user_scan_cfg->ssid_list = request->ssids; @@ -4173,7 +4183,10 @@ int mwifiex_register_cfg80211(struct mwifiex_adapter *adapter) wiphy->features |= NL80211_FEATURE_HT_IBSS | NL80211_FEATURE_INACTIVITY_TIMER | NL80211_FEATURE_LOW_PRIORITY_SCAN | - NL80211_FEATURE_NEED_OBSS_SCAN; + NL80211_FEATURE_NEED_OBSS_SCAN | + NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR | + NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR | + NL80211_FEATURE_ND_RANDOM_MAC_ADDR; if (ISSUPP_TDLS_ENABLED(adapter->fw_cap_info)) wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH; diff --git a/drivers/net/wireless/marvell/mwifiex/fw.h b/drivers/net/wireless/marvell/mwifiex/fw.h index c46267b96462..3797ef41887e 100644 --- a/drivers/net/wireless/marvell/mwifiex/fw.h +++ b/drivers/net/wireless/marvell/mwifiex/fw.h @@ -188,6 +188,7 @@ enum MWIFIEX_802_11_PRIVACY_FILTER { #define TLV_BTCOEX_WL_AGGR_WINSIZE (PROPRIETARY_TLV_BASE_ID + 202) #define TLV_BTCOEX_WL_SCANTIME (PROPRIETARY_TLV_BASE_ID + 203) #define TLV_TYPE_BSS_MODE (PROPRIETARY_TLV_BASE_ID + 206) +#define TLV_TYPE_RANDOM_MAC (PROPRIETARY_TLV_BASE_ID + 236) #define MWIFIEX_TX_DATA_BUF_SIZE_2K 2048 @@ -780,6 +781,11 @@ struct mwifiex_ie_types_scan_chan_gap { __le16 chan_gap; } __packed; +struct mwifiex_ie_types_random_mac { + struct mwifiex_ie_types_header header; + u8 mac[ETH_ALEN]; +} __packed; + struct mwifiex_ietypes_chanstats { struct mwifiex_ie_types_header header; struct mwifiex_fw_chan_stats chanstats[0]; @@ -1464,6 +1470,7 @@ struct mwifiex_user_scan_cfg { /* Variable number (fixed maximum) of channels to scan up */ struct mwifiex_user_scan_chan chan_list[MWIFIEX_USER_SCAN_CHAN_MAX]; u16 scan_chan_gap; + u8 random_mac[ETH_ALEN]; } __packed; #define MWIFIEX_BG_SCAN_CHAN_MAX 38 diff --git a/drivers/net/wireless/marvell/mwifiex/main.h b/drivers/net/wireless/marvell/mwifiex/main.h index 9f6bb400bdae..59026005e4d7 100644 --- a/drivers/net/wireless/marvell/mwifiex/main.h +++ b/drivers/net/wireless/marvell/mwifiex/main.h @@ -675,6 +675,7 @@ struct mwifiex_private { struct mwifiex_user_scan_chan hidden_chan[MWIFIEX_USER_SCAN_CHAN_MAX]; u8 assoc_resp_ht_param; bool ht_param_present; + u8 random_mac[ETH_ALEN]; }; diff --git a/drivers/net/wireless/marvell/mwifiex/scan.c b/drivers/net/wireless/marvell/mwifiex/scan.c index 21ec84794d0c..8daf0d8657b9 100644 --- a/drivers/net/wireless/marvell/mwifiex/scan.c +++ b/drivers/net/wireless/marvell/mwifiex/scan.c @@ -820,6 +820,7 @@ mwifiex_config_scan(struct mwifiex_private *priv, struct mwifiex_adapter *adapter = priv->adapter; struct mwifiex_ie_types_num_probes *num_probes_tlv; struct mwifiex_ie_types_scan_chan_gap *chan_gap_tlv; + struct mwifiex_ie_types_random_mac *random_mac_tlv; struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv; struct mwifiex_ie_types_bssid_list *bssid_tlv; u8 *tlv_pos; @@ -835,6 +836,7 @@ mwifiex_config_scan(struct mwifiex_private *priv, u8 ssid_filter; struct mwifiex_ie_types_htcap *ht_cap; struct mwifiex_ie_types_bss_mode *bss_mode; + const u8 zero_mac[6] = {0, 0, 0, 0, 0, 0}; /* The tlv_buf_len is calculated for each scan command. The TLVs added in this routine will be preserved since the routine that sends the @@ -967,6 +969,18 @@ mwifiex_config_scan(struct mwifiex_private *priv, tlv_pos += sizeof(struct mwifiex_ie_types_scan_chan_gap); } + + if (!ether_addr_equal(user_scan_in->random_mac, zero_mac)) { + random_mac_tlv = (void *)tlv_pos; + random_mac_tlv->header.type = + cpu_to_le16(TLV_TYPE_RANDOM_MAC); + random_mac_tlv->header.len = + cpu_to_le16(sizeof(random_mac_tlv->mac)); + ether_addr_copy(random_mac_tlv->mac, + user_scan_in->random_mac); + tlv_pos += + sizeof(struct mwifiex_ie_types_random_mac); + } } else { scan_cfg_out->bss_mode = (u8) adapter->scan_mode; num_probes = adapter->scan_probes; @@ -1922,6 +1936,7 @@ mwifiex_active_scan_req_for_passive_chan(struct mwifiex_private *priv) } adapter->active_scan_triggered = true; + ether_addr_copy(user_scan_cfg->random_mac, priv->random_mac); user_scan_cfg->num_ssids = priv->scan_request->n_ssids; user_scan_cfg->ssid_list = priv->scan_request->ssids; @@ -2761,6 +2776,7 @@ static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv, if (!scan_cfg) return -ENOMEM; + ether_addr_copy(scan_cfg->random_mac, priv->random_mac); scan_cfg->ssid_list = req_ssid; scan_cfg->num_ssids = 1; -- 2.30.2