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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 <gbhat@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Ganapathi Bhat 2016-07-25 21:21:07 +05:30 committed by Kalle Valo
parent c8ccf3ade7
commit c2a8f0ff9c
4 changed files with 38 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/net/wireless/marvell/mwifiex/cfg80211.c
View File

@ -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;

7
drivers/net/wireless/marvell/mwifiex/fw.h
View File

@ -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

1
drivers/net/wireless/marvell/mwifiex/main.h
View File

@ -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];
};

16
drivers/net/wireless/marvell/mwifiex/scan.c
View File

@ -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;