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station: Take scanned frequencies into account

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Instead of manually managing whether to expire BSSes or not, use the
scanned frequency set instead.  This makes the API slightly easier to
understand (dropping two boolean arguments in a row) and also a bit more
future-proof.
This commit is contained in:
Denis Kenzior 2021-02-03 10:31:24 -06:00
parent ccbd32503b
commit eac2410c83
3 changed files with 21 additions and 14 deletions
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27
src/station.c
View File

@ -386,6 +386,7 @@ static bool bss_match(const void *a, const void *b)
struct bss_expiration_data {
struct scan_bss *connected_bss;
uint64_t now;
const struct scan_freq_set *freqs;
};
#define SCAN_RESULT_BSS_RETENTION_TIME (30 * 1000000)
@ -399,6 +400,10 @@ static bool bss_free_if_expired(void *data, void *user_data)
/* Do not expire the currently connected BSS. */
return false;
/* Keep any BSSes that are not on the frequency list */
if (!scan_freq_set_contains(expiration_data->freqs, bss->frequency))
return false;
if (l_time_before(expiration_data->now,
bss->time_stamp + SCAN_RESULT_BSS_RETENTION_TIME))
return false;
@ -408,11 +413,13 @@ static bool bss_free_if_expired(void *data, void *user_data)
return true;
}
static void station_bss_list_remove_expired_bsses(struct station *station)
static void station_bss_list_remove_expired_bsses(struct station *station,
const struct scan_freq_set *freqs)
{
struct bss_expiration_data data = {
.now = l_time_now(),
.connected_bss = station->connected_bss,
.freqs = freqs,
};
l_queue_foreach_remove(station->bss_list, bss_free_if_expired, &data);
@ -612,9 +619,9 @@ static bool station_start_anqp(struct station *station, struct network *network,
* inside station module or scans running in other state machines, e.g. wsc
*/
void station_set_scan_results(struct station *station,
struct l_queue *new_bss_list,
bool add_to_autoconnect,
bool expire)
struct l_queue *new_bss_list,
const struct scan_freq_set *freqs,
bool add_to_autoconnect)
{
const struct l_queue_entry *bss_entry;
struct network *network;
@ -628,8 +635,7 @@ void station_set_scan_results(struct station *station,
l_queue_destroy(station->autoconnect_list, l_free);
station->autoconnect_list = l_queue_new();
if (expire)
station_bss_list_remove_expired_bsses(station);
station_bss_list_remove_expired_bsses(station, freqs);
for (bss_entry = l_queue_get_entries(station->bss_list); bss_entry;
bss_entry = bss_entry->next) {
@ -1029,7 +1035,7 @@ static bool new_scan_results(int err, struct l_queue *bss_list,
return false;
autoconnect = station_is_autoconnecting(station);
station_set_scan_results(station, bss_list, autoconnect, true);
station_set_scan_results(station, bss_list, freqs, autoconnect);
return true;
}
@ -1096,7 +1102,7 @@ static bool station_quick_scan_results(int err, struct l_queue *bss_list,
goto done;
autoconnect = station_is_autoconnecting(station);
station_set_scan_results(station, bss_list, autoconnect, true);
station_set_scan_results(station, bss_list, freqs, autoconnect);
done:
if (station->state == STATION_STATE_AUTOCONNECT_QUICK)
@ -3012,11 +3018,10 @@ static bool station_dbus_scan_results(int err, struct l_queue *bss_list,
}
autoconnect = station_is_autoconnecting(station);
station_set_scan_results(station, bss_list, freqs, autoconnect);
last_subset = next_idx >= L_ARRAY_SIZE(station->scan_freqs_order) ||
station->scan_freqs_order[next_idx] == NULL;
station_set_scan_results(station, bss_list, autoconnect, last_subset);
station->dbus_scan_subset_idx = next_idx;
if (last_subset || !station_dbus_scan_subset(station))

4
src/station.h
View File

@ -27,6 +27,7 @@ struct netdev;
struct station;
enum security;
struct scan_bss;
struct scan_freq_set;
struct network;
enum station_state {
@ -65,7 +66,8 @@ struct network *station_network_find(struct station *station, const char *ssid,
enum security security);
void station_set_scan_results(struct station *station, struct l_queue *bss_list,
bool add_to_autoconnect, bool expire);
const struct scan_freq_set *freqs,
bool add_to_autoconnect);
enum station_state station_get_state(struct station *station);
uint32_t station_add_state_watch(struct station *station,

4
src/wsc.c
View File

@ -788,7 +788,7 @@ static bool push_button_scan_results(int err, struct l_queue *bss_list,
}
wsc_cancel_scan(wsc);
station_set_scan_results(wsc->station, bss_list, false, true);
station_set_scan_results(wsc->station, bss_list, freqs, false);
l_debug("Found AP to connect to: %s",
util_address_to_string(target->addr));
@ -934,7 +934,7 @@ static bool pin_scan_results(int err, struct l_queue *bss_list,
}
wsc_cancel_scan(wsc);
station_set_scan_results(wsc->station, bss_list, false, true);
station_set_scan_results(wsc->station, bss_list, freqs, false);
l_debug("Found AP to connect to: %s",
util_address_to_string(target->addr));