cfg80211: export multiple MAC addresses in sysfs

If a device has multiple MAC addresses, userspace will
need to know about that. Similarly, if it allows the
MAC addresses to vary by a bitmask.

If a driver exports multiple addresses, it is assumed
that it will be able to deal with that many different
addresses, which need not necessarily match the ones
programmed into the device; if a mask is set then the
device should deal addresses within that mask based
on an arbitrary "base address".

To test it all and show how it is used, add support
to hwsim even though it can't actually deal with
addresses different from the default.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index 84df3fcf37b3..0dbda8dfbd99 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -281,6 +281,8 @@ struct mac80211_hwsim_data {
         struct ieee80211_channel channels_5ghz[ARRAY_SIZE(hwsim_channels_5ghz)];
         struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
 
+        struct mac_address addresses[2];
+
         struct ieee80211_channel *channel;
         unsigned long beacon_int; /* in jiffies unit */
         unsigned int rx_filter;
@@ -1154,7 +1156,11 @@ static int __init init_mac80211_hwsim(void)
                 SET_IEEE80211_DEV(hw, data->dev);
                 addr[3] = i >> 8;
                 addr[4] = i;
-                SET_IEEE80211_PERM_ADDR(hw, addr);
+                memcpy(data->addresses[0].addr, addr, ETH_ALEN);
+                memcpy(data->addresses[1].addr, addr, ETH_ALEN);
+                data->addresses[1].addr[0] |= 0x40;
+                hw->wiphy->n_addresses = 2;
+                hw->wiphy->addresses = data->addresses;
 
                 hw->channel_change_time = 1;
                 hw->queues = 4;