{
struct wpa_ssid *ssid = wpa_s->conf->ssid;
int count = 0, disabled = 0;
+
+ if (wpa_s->p2p_mgmt)
+ return 0; /* no normal network profiles on p2p_mgmt interface */
+
while (ssid) {
if (!wpas_network_disabled(wpa_s, ssid))
count++;
static void wpas_add_interworking_elements(struct wpa_supplicant *wpa_s,
struct wpabuf *buf)
{
- if (wpa_s->conf->interworking == 0)
- return;
-
- wpabuf_put_u8(buf, WLAN_EID_EXT_CAPAB);
- wpabuf_put_u8(buf, 6);
- wpabuf_put_u8(buf, 0x00);
- wpabuf_put_u8(buf, 0x00);
- wpabuf_put_u8(buf, 0x00);
- wpabuf_put_u8(buf, 0x80); /* Bit 31 - Interworking */
- wpabuf_put_u8(buf, 0x00);
-#ifdef CONFIG_HS20
- wpabuf_put_u8(buf, 0x40); /* Bit 46 - WNM-Notification */
-#else /* CONFIG_HS20 */
- wpabuf_put_u8(buf, 0x00);
-#endif /* CONFIG_HS20 */
-
wpabuf_put_u8(buf, WLAN_EID_INTERWORKING);
wpabuf_put_u8(buf, is_zero_ether_addr(wpa_s->conf->hessid) ? 1 :
1 + ETH_ALEN);
static struct wpabuf * wpa_supplicant_extra_ies(struct wpa_supplicant *wpa_s)
{
struct wpabuf *extra_ie = NULL;
+ u8 ext_capab[18];
+ int ext_capab_len;
#ifdef CONFIG_WPS
int wps = 0;
enum wps_request_type req_type = WPS_REQ_ENROLLEE_INFO;
#endif /* CONFIG_WPS */
+ ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
+ sizeof(ext_capab));
+ if (ext_capab_len > 0 &&
+ wpabuf_resize(&extra_ie, ext_capab_len) == 0)
+ wpabuf_put_data(extra_ie, ext_capab, ext_capab_len);
+
#ifdef CONFIG_INTERWORKING
if (wpa_s->conf->interworking &&
wpabuf_resize(&extra_ie, 100) == 0)
}
+static int wpa_set_ssids_from_scan_req(struct wpa_supplicant *wpa_s,
+ struct wpa_driver_scan_params *params,
+ size_t max_ssids)
+{
+ unsigned int i;
+
+ if (wpa_s->ssids_from_scan_req == NULL ||
+ wpa_s->num_ssids_from_scan_req == 0)
+ return 0;
+
+ if (wpa_s->num_ssids_from_scan_req > max_ssids) {
+ wpa_s->num_ssids_from_scan_req = max_ssids;
+ wpa_printf(MSG_DEBUG, "Over max scan SSIDs from scan req: %u",
+ (unsigned int) max_ssids);
+ }
+
+ for (i = 0; i < wpa_s->num_ssids_from_scan_req; i++) {
+ params->ssids[i].ssid = wpa_s->ssids_from_scan_req[i].ssid;
+ params->ssids[i].ssid_len =
+ wpa_s->ssids_from_scan_req[i].ssid_len;
+ wpa_hexdump_ascii(MSG_DEBUG, "specific SSID",
+ params->ssids[i].ssid,
+ params->ssids[i].ssid_len);
+ }
+
+ params->num_ssids = wpa_s->num_ssids_from_scan_req;
+ wpa_s->num_ssids_from_scan_req = 0;
+ return 1;
+}
+
+
static void wpa_supplicant_scan(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
struct wpa_driver_scan_params params;
struct wpa_driver_scan_params *scan_params;
size_t max_ssids;
+ int connect_without_scan = 0;
if (wpa_s->pno || wpa_s->pno_sched_pending) {
wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - PNO is in progress");
return;
}
+ ssid = NULL;
+ if (wpa_s->scan_req != MANUAL_SCAN_REQ &&
+ wpa_s->connect_without_scan) {
+ connect_without_scan = 1;
+ for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
+ if (ssid == wpa_s->connect_without_scan)
+ break;
+ }
+ }
+
p2p_in_prog = wpas_p2p_in_progress(wpa_s);
- if (p2p_in_prog && p2p_in_prog != 2) {
+ if (p2p_in_prog && p2p_in_prog != 2 &&
+ (!ssid ||
+ (ssid->mode != WPAS_MODE_AP && ssid->mode != WPAS_MODE_P2P_GO))) {
wpa_dbg(wpa_s, MSG_DEBUG, "Delay station mode scan while P2P operation is in progress");
wpa_supplicant_req_scan(wpa_s, 5, 0);
return;
wpa_s->last_scan_req = wpa_s->scan_req;
wpa_s->scan_req = NORMAL_SCAN_REQ;
+ if (connect_without_scan) {
+ wpa_s->connect_without_scan = NULL;
+ if (ssid) {
+ wpa_printf(MSG_DEBUG, "Start a pre-selected network "
+ "without scan step");
+ wpa_supplicant_associate(wpa_s, NULL, ssid);
+ return;
+ }
+ }
+
os_memset(¶ms, 0, sizeof(params));
wpa_s->scan_prev_wpa_state = wpa_s->wpa_state;
goto scan;
}
- if (wpa_s->last_scan_req != MANUAL_SCAN_REQ &&
- wpa_s->connect_without_scan) {
- for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
- if (ssid == wpa_s->connect_without_scan)
- break;
- }
- wpa_s->connect_without_scan = NULL;
- if (ssid) {
- wpa_printf(MSG_DEBUG, "Start a pre-selected network "
- "without scan step");
- wpa_supplicant_associate(wpa_s, NULL, ssid);
- return;
- }
+ if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
+ wpa_set_ssids_from_scan_req(wpa_s, ¶ms, max_ssids)) {
+ wpa_printf(MSG_DEBUG, "Use specific SSIDs from SCAN command");
+ goto ssid_list_set;
}
#ifdef CONFIG_P2P
wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for wildcard "
"SSID");
}
-#ifdef CONFIG_P2P
-ssid_list_set:
-#endif /* CONFIG_P2P */
+ssid_list_set:
wpa_supplicant_optimize_freqs(wpa_s, ¶ms);
extra_ie = wpa_supplicant_extra_ies(wpa_s);
*/
void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec)
{
- int res = eloop_deplete_timeout(sec, usec, wpa_supplicant_scan, wpa_s,
- NULL);
+ int res;
+
+ if (wpa_s->p2p_mgmt) {
+ wpa_dbg(wpa_s, MSG_DEBUG,
+ "Ignore scan request (%d.%06d sec) on p2p_mgmt interface",
+ sec, usec);
+ return;
+ }
+
+ res = eloop_deplete_timeout(sec, usec, wpa_supplicant_scan, wpa_s,
+ NULL);
if (res == 1) {
wpa_dbg(wpa_s, MSG_DEBUG, "Rescheduling scan request: %d.%06d sec",
sec, usec);
*/
#define GREAT_SNR 30
+#define IS_5GHZ(n) (n > 4000)
+
/* Compare function for sorting scan results. Return >0 if @b is considered
* better. */
static int wpa_scan_result_compar(const void *a, const void *b)
{
-#define IS_5GHZ(n) (n > 4000)
#define MIN(a,b) a < b ? a : b
struct wpa_scan_res **_wa = (void *) a;
struct wpa_scan_res **_wb = (void *) b;
struct wpa_scan_res *wa = *_wa;
struct wpa_scan_res *wb = *_wb;
- int wpa_a, wpa_b, maxrate_a, maxrate_b;
- int snr_a, snr_b;
+ int wpa_a, wpa_b;
+ int snr_a, snr_b, snr_a_full, snr_b_full;
/* WPA/WPA2 support preferred */
wpa_a = wpa_scan_get_vendor_ie(wa, WPA_IE_VENDOR_TYPE) != NULL ||
(wb->caps & IEEE80211_CAP_PRIVACY) == 0)
return -1;
- if ((wa->flags & wb->flags & WPA_SCAN_LEVEL_DBM) &&
- !((wa->flags | wb->flags) & WPA_SCAN_NOISE_INVALID)) {
- snr_a = MIN(wa->level - wa->noise, GREAT_SNR);
- snr_b = MIN(wb->level - wb->noise, GREAT_SNR);
+ if (wa->flags & wb->flags & WPA_SCAN_LEVEL_DBM) {
+ snr_a_full = wa->snr;
+ snr_a = MIN(wa->snr, GREAT_SNR);
+ snr_b_full = wb->snr;
+ snr_b = MIN(wa->snr, GREAT_SNR);
} else {
- /* Not suitable information to calculate SNR, so use level */
- snr_a = wa->level;
- snr_b = wb->level;
+ /* Level is not in dBm, so we can't calculate
+ * SNR. Just use raw level (units unknown). */
+ snr_a = snr_a_full = wa->level;
+ snr_b = snr_b_full = wb->level;
}
- /* best/max rate preferred if SNR close enough */
- if ((snr_a && snr_b && abs(snr_b - snr_a) < 5) ||
+ /* if SNR is close, decide by max rate or frequency band */
+ if ((snr_a && snr_b && abs(snr_b - snr_a) < 5) ||
(wa->qual && wb->qual && abs(wb->qual - wa->qual) < 10)) {
- maxrate_a = wpa_scan_get_max_rate(wa);
- maxrate_b = wpa_scan_get_max_rate(wb);
- if (maxrate_a != maxrate_b)
- return maxrate_b - maxrate_a;
+ if (wa->est_throughput != wb->est_throughput)
+ return wb->est_throughput - wa->est_throughput;
if (IS_5GHZ(wa->freq) ^ IS_5GHZ(wb->freq))
return IS_5GHZ(wa->freq) ? -1 : 1;
}
- /* use freq for channel preference */
-
/* all things being equal, use SNR; if SNRs are
* identical, use quality values since some drivers may only report
* that value and leave the signal level zero */
- if (snr_b == snr_a)
+ if (snr_b_full == snr_a_full)
return wb->qual - wa->qual;
- return snr_b - snr_a;
+ return snr_b_full - snr_a_full;
#undef MIN
-#undef IS_5GHZ
}
for (i = 0; i < scan_res->num; i++) {
struct wpa_scan_res *r = scan_res->res[i];
u8 *pos;
- if ((r->flags & (WPA_SCAN_LEVEL_DBM | WPA_SCAN_NOISE_INVALID))
- == WPA_SCAN_LEVEL_DBM) {
- int snr = r->level - r->noise;
+ if (r->flags & WPA_SCAN_LEVEL_DBM) {
+ int noise_valid = !(r->flags & WPA_SCAN_NOISE_INVALID);
+
wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d "
- "noise=%d level=%d snr=%d%s flags=0x%x "
- "age=%u",
+ "noise=%d%s level=%d snr=%d%s flags=0x%x age=%u est=%u",
MAC2STR(r->bssid), r->freq, r->qual,
- r->noise, r->level, snr,
- snr >= GREAT_SNR ? "*" : "", r->flags,
- r->age);
+ r->noise, noise_valid ? "" : "~", r->level,
+ r->snr, r->snr >= GREAT_SNR ? "*" : "",
+ r->flags,
+ r->age, r->est_throughput);
} else {
wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d "
- "noise=%d level=%d flags=0x%x age=%u",
+ "noise=%d level=%d flags=0x%x age=%u est=%u",
MAC2STR(r->bssid), r->freq, r->qual,
- r->noise, r->level, r->flags, r->age);
+ r->noise, r->level, r->flags, r->age,
+ r->est_throughput);
}
pos = (u8 *) (r + 1);
if (r->ie_len)
}
+/*
+ * Noise floor values to use when we have signal strength
+ * measurements, but no noise floor measurments. These values were
+ * measured in an office environment with many APs.
+ */
+#define DEFAULT_NOISE_FLOOR_2GHZ (-89)
+#define DEFAULT_NOISE_FLOOR_5GHZ (-92)
+
+static void scan_snr(struct wpa_scan_res *res)
+{
+ if (res->flags & WPA_SCAN_NOISE_INVALID) {
+ res->noise = IS_5GHZ(res->freq) ?
+ DEFAULT_NOISE_FLOOR_5GHZ :
+ DEFAULT_NOISE_FLOOR_2GHZ;
+ }
+
+ if (res->flags & WPA_SCAN_LEVEL_DBM) {
+ res->snr = res->level - res->noise;
+ } else {
+ /* Level is not in dBm, so we can't calculate
+ * SNR. Just use raw level (units unknown). */
+ res->snr = res->level;
+ }
+}
+
+
+static unsigned int max_ht20_rate(int snr)
+{
+ if (snr < 6)
+ return 6500; /* HT20 MCS0 */
+ if (snr < 8)
+ return 13000; /* HT20 MCS1 */
+ if (snr < 13)
+ return 19500; /* HT20 MCS2 */
+ if (snr < 17)
+ return 26000; /* HT20 MCS3 */
+ if (snr < 20)
+ return 39000; /* HT20 MCS4 */
+ if (snr < 23)
+ return 52000; /* HT20 MCS5 */
+ if (snr < 24)
+ return 58500; /* HT20 MCS6 */
+ return 65000; /* HT20 MCS7 */
+}
+
+
+static unsigned int max_ht40_rate(int snr)
+{
+ if (snr < 3)
+ return 13500; /* HT40 MCS0 */
+ if (snr < 6)
+ return 27000; /* HT40 MCS1 */
+ if (snr < 10)
+ return 40500; /* HT40 MCS2 */
+ if (snr < 15)
+ return 54000; /* HT40 MCS3 */
+ if (snr < 17)
+ return 81000; /* HT40 MCS4 */
+ if (snr < 22)
+ return 108000; /* HT40 MCS5 */
+ if (snr < 24)
+ return 121500; /* HT40 MCS6 */
+ return 135000; /* HT40 MCS7 */
+}
+
+
+static unsigned int max_vht80_rate(int snr)
+{
+ if (snr < 1)
+ return 0;
+ if (snr < 2)
+ return 29300; /* VHT80 MCS0 */
+ if (snr < 5)
+ return 58500; /* VHT80 MCS1 */
+ if (snr < 9)
+ return 87800; /* VHT80 MCS2 */
+ if (snr < 11)
+ return 117000; /* VHT80 MCS3 */
+ if (snr < 15)
+ return 175500; /* VHT80 MCS4 */
+ if (snr < 16)
+ return 234000; /* VHT80 MCS5 */
+ if (snr < 18)
+ return 263300; /* VHT80 MCS6 */
+ if (snr < 20)
+ return 292500; /* VHT80 MCS7 */
+ if (snr < 22)
+ return 351000; /* VHT80 MCS8 */
+ return 390000; /* VHT80 MCS9 */
+}
+
+
+static void scan_est_throughput(struct wpa_supplicant *wpa_s,
+ struct wpa_scan_res *res)
+{
+ enum local_hw_capab capab = wpa_s->hw_capab;
+ int rate; /* max legacy rate in 500 kb/s units */
+ const u8 *ie;
+ unsigned int est, tmp;
+ int snr = res->snr;
+
+ if (res->est_throughput)
+ return;
+
+ /* Get maximum legacy rate */
+ rate = wpa_scan_get_max_rate(res);
+
+ /* Limit based on estimated SNR */
+ if (rate > 1 * 2 && snr < 1)
+ rate = 1 * 2;
+ else if (rate > 2 * 2 && snr < 4)
+ rate = 2 * 2;
+ else if (rate > 6 * 2 && snr < 5)
+ rate = 6 * 2;
+ else if (rate > 9 * 2 && snr < 6)
+ rate = 9 * 2;
+ else if (rate > 12 * 2 && snr < 7)
+ rate = 12 * 2;
+ else if (rate > 18 * 2 && snr < 10)
+ rate = 18 * 2;
+ else if (rate > 24 * 2 && snr < 11)
+ rate = 24 * 2;
+ else if (rate > 36 * 2 && snr < 15)
+ rate = 36 * 2;
+ else if (rate > 48 * 2 && snr < 19)
+ rate = 48 * 2;
+ else if (rate > 54 * 2 && snr < 21)
+ rate = 54 * 2;
+ est = rate * 500;
+
+ if (capab == CAPAB_HT || capab == CAPAB_HT40 || capab == CAPAB_VHT) {
+ ie = wpa_scan_get_ie(res, WLAN_EID_HT_CAP);
+ if (ie) {
+ tmp = max_ht20_rate(snr);
+ if (tmp > est)
+ est = tmp;
+ }
+ }
+
+ if (capab == CAPAB_HT40 || capab == CAPAB_VHT) {
+ ie = wpa_scan_get_ie(res, WLAN_EID_HT_OPERATION);
+ if (ie && ie[1] >= 2 &&
+ (ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)) {
+ tmp = max_ht40_rate(snr);
+ if (tmp > est)
+ est = tmp;
+ }
+ }
+
+ if (capab == CAPAB_VHT) {
+ /* Use +1 to assume VHT is always faster than HT */
+ ie = wpa_scan_get_ie(res, WLAN_EID_VHT_CAP);
+ if (ie) {
+ tmp = max_ht20_rate(snr) + 1;
+ if (tmp > est)
+ est = tmp;
+
+ ie = wpa_scan_get_ie(res, WLAN_EID_HT_OPERATION);
+ if (ie && ie[1] >= 2 &&
+ (ie[3] &
+ HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)) {
+ tmp = max_ht40_rate(snr) + 1;
+ if (tmp > est)
+ est = tmp;
+ }
+
+ ie = wpa_scan_get_ie(res, WLAN_EID_VHT_OPERATION);
+ if (ie && ie[1] >= 1 &&
+ (ie[2] & VHT_OPMODE_CHANNEL_WIDTH_MASK)) {
+ tmp = max_vht80_rate(snr) + 1;
+ if (tmp > est)
+ est = tmp;
+ }
+ }
+ }
+
+ /* TODO: channel utilization and AP load (e.g., from AP Beacon) */
+
+ res->est_throughput = est;
+}
+
+
/**
* wpa_supplicant_get_scan_results - Get scan results
* @wpa_s: Pointer to wpa_supplicant data
}
filter_scan_res(wpa_s, scan_res);
+ for (i = 0; i < scan_res->num; i++) {
+ struct wpa_scan_res *scan_res_item = scan_res->res[i];
+
+ scan_snr(scan_res_item);
+ scan_est_throughput(wpa_s, scan_res_item);
+ }
+
#ifdef CONFIG_WPS
if (wpas_wps_searching(wpa_s)) {
wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Order scan results with WPS "
int wpas_start_pno(struct wpa_supplicant *wpa_s)
{
- int ret, interval;
+ int ret, interval, prio;
size_t i, num_ssid, num_match_ssid;
struct wpa_ssid *ssid;
struct wpa_driver_scan_params params;
sizeof(struct wpa_driver_scan_filter));
if (params.filter_ssids == NULL)
return -1;
+
i = 0;
- ssid = wpa_s->conf->ssid;
+ prio = 0;
+ ssid = wpa_s->conf->pssid[prio];
while (ssid) {
if (!wpas_network_disabled(wpa_s, ssid)) {
if (ssid->scan_ssid && params.num_ssids < num_ssid) {
if (i == num_match_ssid)
break;
}
- ssid = ssid->next;
+ if (ssid->pnext)
+ ssid = ssid->pnext;
+ else if (prio + 1 == wpa_s->conf->num_prio)
+ break;
+ else
+ ssid = wpa_s->conf->pssid[++prio];
}
if (wpa_s->conf->filter_rssi)
projects / thirdparty / hostap.git / blobdiff