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nl80211: Allow PASN Authentication frames with random (foreign) MAC address

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To support secure ranging with a random MAC address, PASN handshake is
performed with a different source MAC address from the device's own
interface address. Hence, allow PASN Authentication frames with any
foreign MAC address to further process the Authentication frames.

Signed-off-by: Jouni Malinen <quic_jouni@quicinc.com>
This commit is contained in:
Vinay Gannevaram 2022-07-26 13:36:05 +05:30 • committed by Jouni Malinen
parent 24929543ba
commit 58a96187ee
1 changed files with 26 additions and 5 deletions
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31
src/drivers/driver_nl80211_event.c
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@ -1089,6 +1089,7 @@ static void mlme_event(struct i802_bss *bss,
struct nlattr *wmm, struct nlattr *req_ie)
{
struct wpa_driver_nl80211_data *drv = bss->drv;
u16 stype = 0, auth_type = 0;
const u8 *data;
size_t len;
@ -1118,11 +1119,31 @@ static void mlme_event(struct i802_bss *bss,
nl80211_command_to_string(cmd), bss->ifname,
MAC2STR(bss->addr), MAC2STR(data + 4),
MAC2STR(data + 4 + ETH_ALEN));
if (cmd != NL80211_CMD_FRAME_TX_STATUS && !(data[4] & 0x01) &&
os_memcmp(bss->addr, data + 4, ETH_ALEN) != 0 &&
(is_zero_ether_addr(bss->rand_addr) ||
os_memcmp(bss->rand_addr, data + 4, ETH_ALEN) != 0) &&
os_memcmp(bss->addr, data + 4 + ETH_ALEN, ETH_ALEN) != 0) {
/* PASN Authentication frame can be received with a different source MAC
* address. Allow NL80211_CMD_FRAME event with foreign addresses also.
*/
if (cmd == NL80211_CMD_FRAME && len >= 24) {
const struct ieee80211_mgmt *mgmt;
u16 fc;
mgmt = (const struct ieee80211_mgmt *) data;
fc = le_to_host16(mgmt->frame_control);
stype = WLAN_FC_GET_STYPE(fc);
auth_type = le_to_host16(mgmt->u.auth.auth_alg);
}
if (cmd == NL80211_CMD_FRAME && stype == WLAN_FC_STYPE_AUTH &&
auth_type == host_to_le16(WLAN_AUTH_PASN)) {
wpa_printf(MSG_DEBUG,
"nl80211: %s: Allow PASN frame for foreign address",
bss->ifname);
} else if (cmd != NL80211_CMD_FRAME_TX_STATUS &&
!(data[4] & 0x01) &&
os_memcmp(bss->addr, data + 4, ETH_ALEN) != 0 &&
(is_zero_ether_addr(bss->rand_addr) ||
os_memcmp(bss->rand_addr, data + 4, ETH_ALEN) != 0) &&
os_memcmp(bss->addr, data + 4 + ETH_ALEN, ETH_ALEN) != 0) {
wpa_printf(MSG_MSGDUMP, "nl80211: %s: Ignore MLME frame event "
"for foreign address", bss->ifname);
return;