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netdev: Remove prev_bssid member

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This variable ended up being used only on the fast-transition path.  On
the re-associate path it was never used, but memcpy-ied nevertheless.
Since its only use is by auth_proto based protocols, move it to the
auth_proto object directly.

Due to how prepare_ft works (we need prev_bssid from the handshake, but
the handshake is reset), have netdev_ft_* methods take an 'orig_bss'
parameter, similar to netdev_reassociate.
This commit is contained in:
Denis Kenzior 2021-08-04 15:38:38 -05:00
parent 60e2a9994f
commit 317e345a6a
4 changed files with 19 additions and 11 deletions
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1
src/auth-proto.h
View File

@ -31,6 +31,7 @@ struct auth_proto {
const uint8_t *frame, size_t len);
bool (*auth_timeout)(struct auth_proto *ap);
bool (*assoc_timeout)(struct auth_proto *ap);
uint8_t prev_bssid[6];
};
static inline void auth_proto_free(struct auth_proto *ap)

18
src/netdev.c
View File

@ -134,7 +134,6 @@ struct netdev {
struct l_timeout *sa_query_timeout;
struct l_timeout *group_handshake_timeout;
uint16_t sa_query_id;
uint8_t prev_bssid[ETH_ALEN];
uint8_t prev_snonce[32];
int8_t rssi_levels[16];
uint8_t rssi_levels_num;
@ -3609,8 +3608,6 @@ int netdev_reassociate(struct netdev *netdev, struct scan_bss *target_bss,
netdev_connect_common(netdev, cmd_connect, target_bss, hs, sm,
event_filter, cb, user_data);
memcpy(netdev->prev_bssid, orig_bss->addr, ETH_ALEN);
netdev->associated = false;
netdev->operational = false;
netdev->connected = false;
@ -3817,12 +3814,13 @@ static int netdev_ft_tx_associate(struct iovec *ie_iov, size_t iov_len,
void *user_data)
{
struct netdev *netdev = user_data;
struct auth_proto *ap = netdev->ap;
struct l_genl_msg *msg;
msg = netdev_build_cmd_associate_common(netdev);
l_genl_msg_append_attr(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
netdev->prev_bssid);
ap->prev_bssid);
l_genl_msg_append_attrv(msg, NL80211_ATTR_IE, ie_iov, iov_len);
netdev->connect_cmd_id = l_genl_family_send(nl80211, msg,
@ -3837,7 +3835,7 @@ static int netdev_ft_tx_associate(struct iovec *ie_iov, size_t iov_len,
return 0;
}
static void prepare_ft(struct netdev *netdev, struct scan_bss *target_bss)
static void prepare_ft(struct netdev *netdev, const struct scan_bss *target_bss)
{
struct netdev_handshake_state *nhs;
@ -3848,7 +3846,6 @@ static void prepare_ft(struct netdev *netdev, struct scan_bss *target_bss)
*/
memcpy(netdev->prev_snonce, netdev->handshake->snonce, 32);
memcpy(netdev->prev_bssid, netdev->handshake->aa, 6);
netdev->frequency = target_bss->frequency;
handshake_state_set_authenticator_address(netdev->handshake,
@ -4017,7 +4014,9 @@ static const struct wiphy_radio_work_item_ops ft_work_ops = {
.do_work = netdev_ft_work_ready,
};
int netdev_fast_transition(struct netdev *netdev, struct scan_bss *target_bss,
int netdev_fast_transition(struct netdev *netdev,
const struct scan_bss *target_bss,
const struct scan_bss *orig_bss,
netdev_connect_cb_t cb)
{
if (!netdev->operational)
@ -4037,6 +4036,7 @@ int netdev_fast_transition(struct netdev *netdev, struct scan_bss *target_bss,
netdev->ap = ft_over_air_sm_new(netdev->handshake,
netdev_ft_tx_authenticate,
netdev_ft_tx_associate, netdev);
memcpy(netdev->ap->prev_bssid, orig_bss->addr, ETH_ALEN);
wiphy_radio_work_insert(netdev->wiphy, &netdev->work, 1,
&ft_work_ops);
@ -4045,7 +4045,8 @@ int netdev_fast_transition(struct netdev *netdev, struct scan_bss *target_bss,
}
int netdev_fast_transition_over_ds(struct netdev *netdev,
struct scan_bss *target_bss,
const struct scan_bss *target_bss,
const struct scan_bss *orig_bss,
netdev_connect_cb_t cb)
{
struct netdev_ft_over_ds_info *info;
@ -4076,6 +4077,7 @@ int netdev_fast_transition_over_ds(struct netdev *netdev,
netdev->ap = ft_over_ds_sm_new(netdev->handshake,
netdev_ft_tx_associate,
netdev);
memcpy(netdev->ap->prev_bssid, orig_bss->addr, ETH_ALEN);
wiphy_radio_work_insert(netdev->wiphy, &netdev->work, 1,
&ft_work_ops);

7
src/netdev.h
View File

@ -161,12 +161,15 @@ int netdev_reassociate(struct netdev *netdev, struct scan_bss *target_bss,
struct scan_bss *orig_bss, struct handshake_state *hs,
netdev_event_func_t event_filter,
netdev_connect_cb_t cb, void *user_data);
int netdev_fast_transition(struct netdev *netdev, struct scan_bss *target_bss,
int netdev_fast_transition(struct netdev *netdev,
const struct scan_bss *target_bss,
const struct scan_bss *orig_bss,
netdev_connect_cb_t cb);
int netdev_fast_transition_over_ds_action(struct netdev *netdev,
const struct scan_bss *target_bss);
int netdev_fast_transition_over_ds(struct netdev *netdev,
struct scan_bss *target_bss,
const struct scan_bss *target_bss,
const struct scan_bss *orig_bss,
netdev_connect_cb_t cb);
int netdev_preauthenticate(struct netdev *netdev, struct scan_bss *target_bss,
netdev_preauthenticate_cb_t cb,

4
src/station.c
View File

@ -1731,7 +1731,8 @@ static void station_transition_start(struct station *station,
/* FT-over-DS can be better suited for these situations */
if ((hs->mde[4] & 1) && station->signal_low) {
ret = netdev_fast_transition_over_ds(station->netdev,
bss, station_fast_transition_cb);
bss, station->connected_bss,
station_fast_transition_cb);
/* No action responses from this BSS, try over air */
if (ret == -ENOENT)
goto try_over_air;
@ -1746,6 +1747,7 @@ static void station_transition_start(struct station *station,
} else {
try_over_air:
if (netdev_fast_transition(station->netdev, bss,
station->connected_bss,
station_fast_transition_cb) < 0) {
station_roam_failed(station);
return;