static struct wpabuf * wpa_supplicant_extra_ies(struct wpa_supplicant *wpa_s)
{
struct wpabuf *extra_ie = NULL;
#ifdef CONFIG_WPS
int wps = 0;
enum wps_request_type req_type = WPS_REQ_ENROLLEE_INFO;
#endif /* CONFIG_WPS */
#ifdef CONFIG_INTERWORKING
if (wpa_s->conf->interworking &&
wpabuf_resize(&extra_ie, 100) == 0)
wpas_add_interworking_elements(wpa_s, extra_ie);
#endif /* CONFIG_INTERWORKING */
#ifdef CONFIG_WPS
wps = wpas_wps_in_use(wpa_s, &req_type);
if (wps) {
struct wpabuf *wps_ie;
wps_ie = wps_build_probe_req_ie(wps == 2 ? DEV_PW_PUSHBUTTON :
DEV_PW_DEFAULT,
&wpa_s->wps->dev,
wpa_s->wps->uuid, req_type,
0, NULL);
if (wps_ie) {
if (wpabuf_resize(&extra_ie, wpabuf_len(wps_ie)) == 0)
wpabuf_put_buf(extra_ie, wps_ie);
wpabuf_free(wps_ie);
}
}
#ifdef CONFIG_P2P
if (wps) {
size_t ielen = p2p_scan_ie_buf_len(wpa_s->global->p2p);
if (wpabuf_resize(&extra_ie, ielen) == 0)
wpas_p2p_scan_ie(wpa_s, extra_ie);
}
#endif /* CONFIG_P2P */
#endif /* CONFIG_WPS */
#ifdef CONFIG_HS20
if (wpa_s->conf->hs20 && wpabuf_resize(&extra_ie, 7) == 0)
wpas_hs20_add_indication(extra_ie);
#endif /* CONFIG_HS20 */
return extra_ie;
}
static void wpa_supplicant_scan(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
struct wpa_ssid *ssid;
int scan_req = 0, ret;
struct wpabuf *wps_ie = NULL;
#ifdef CONFIG_WPS
int wps = 0;
enum wps_request_type req_type = WPS_REQ_ENROLLEE_INFO;
#endif /* CONFIG_WPS */
struct wpa_driver_scan_params params;
size_t max_ssids;
enum wpa_states prev_state;
if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) {
wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - interface disabled");
return;
}
if (wpa_s->disconnected && !wpa_s->scan_req) {
wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
return;
}
if (!wpa_supplicant_enabled_networks(wpa_s->conf) &&
!wpa_s->scan_req) {
wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks - do not scan");
wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
return;
}
if (wpa_s->conf->ap_scan != 0 &&
(wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED)) {
wpa_dbg(wpa_s, MSG_DEBUG, "Using wired authentication - "
"overriding ap_scan configuration");
wpa_s->conf->ap_scan = 0;
wpas_notify_ap_scan_changed(wpa_s);
}
if (wpa_s->conf->ap_scan == 0) {
wpa_supplicant_gen_assoc_event(wpa_s);
return;
}
if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) ||
wpa_s->conf->ap_scan == 2)
max_ssids = 1;
else {
max_ssids = wpa_s->max_scan_ssids;
if (max_ssids > WPAS_MAX_SCAN_SSIDS)
max_ssids = WPAS_MAX_SCAN_SSIDS;
}
#ifdef CONFIG_WPS
wps = wpas_wps_in_use(wpa_s->conf, &req_type);
#endif /* CONFIG_WPS */
scan_req = wpa_s->scan_req;
wpa_s->scan_req = 0;
os_memset(¶ms, 0, sizeof(params));
prev_state = wpa_s->wpa_state;
if (wpa_s->wpa_state == WPA_DISCONNECTED ||
wpa_s->wpa_state == WPA_INACTIVE)
wpa_supplicant_set_state(wpa_s, WPA_SCANNING);
/* Find the starting point from which to continue scanning */
ssid = wpa_s->conf->ssid;
if (wpa_s->prev_scan_ssid != WILDCARD_SSID_SCAN) {
while (ssid) {
if (ssid == wpa_s->prev_scan_ssid) {
ssid = ssid->next;
break;
}
ssid = ssid->next;
}
}
if (scan_req != 2 && (wpa_s->conf->ap_scan == 2 ||
wpa_s->connect_without_scan)) {
wpa_s->connect_without_scan = 0;
wpa_supplicant_assoc_try(wpa_s, ssid);
return;
} else if (wpa_s->conf->ap_scan == 2) {
/*
* User-initiated scan request in ap_scan == 2; scan with
* wildcard SSID.
*/
ssid = NULL;
} else {
struct wpa_ssid *start = ssid, *tssid;
int freqs_set = 0;
if (ssid == NULL && max_ssids > 1)
ssid = wpa_s->conf->ssid;
while (ssid) {
if (!ssid->disabled && ssid->scan_ssid) {
wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID",
ssid->ssid, ssid->ssid_len);
params.ssids[params.num_ssids].ssid =
ssid->ssid;
params.ssids[params.num_ssids].ssid_len =
ssid->ssid_len;
params.num_ssids++;
if (params.num_ssids + 1 >= max_ssids)
break;
}
ssid = ssid->next;
if (ssid == start)
break;
if (ssid == NULL && max_ssids > 1 &&
start != wpa_s->conf->ssid)
ssid = wpa_s->conf->ssid;
}
for (tssid = wpa_s->conf->ssid; tssid; tssid = tssid->next) {
if (tssid->disabled)
continue;
if ((params.freqs || !freqs_set) && tssid->scan_freq) {
int_array_concat(¶ms.freqs,
tssid->scan_freq);
} else {
os_free(params.freqs);
params.freqs = NULL;
}
freqs_set = 1;
}
int_array_sort_unique(params.freqs);
}
if (ssid) {
wpa_s->prev_scan_ssid = ssid;
if (max_ssids > 1) {
wpa_dbg(wpa_s, MSG_DEBUG, "Include wildcard SSID in "
"the scan request");
params.num_ssids++;
}
wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for specific "
"SSID(s)");
} else {
wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
params.num_ssids++;
wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for wildcard "
"SSID");
}
#ifdef CONFIG_P2P
wpa_s->wps->dev.p2p = 1;
if (!wps) {
wps = 1;
req_type = WPS_REQ_ENROLLEE_INFO;
}
if (params.freqs == NULL && wpa_s->p2p_in_provisioning &&
wpa_s->go_params) {
/* Optimize provisioning state scan based on GO information */
if (wpa_s->p2p_in_provisioning < 5 &&
wpa_s->go_params->freq > 0) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO "
"preferred frequency %d MHz",
wpa_s->go_params->freq);
params.freqs = os_zalloc(2 * sizeof(int));
if (params.freqs)
params.freqs[0] = wpa_s->go_params->freq;
} else if (wpa_s->p2p_in_provisioning < 8 &&
wpa_s->go_params->freq_list[0]) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only common "
"channels");
int_array_concat(¶ms.freqs,
wpa_s->go_params->freq_list);
if (params.freqs)
int_array_sort_unique(params.freqs);
}
wpa_s->p2p_in_provisioning++;
}
#endif /* CONFIG_P2P */
#ifdef CONFIG_WPS
if (params.freqs == NULL && wpa_s->after_wps && wpa_s->wps_freq) {
/*
* Optimize post-provisioning scan based on channel used
* during provisioning.
*/
wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz "
"that was used during provisioning", wpa_s->wps_freq);
params.freqs = os_zalloc(2 * sizeof(int));
if (params.freqs)
params.freqs[0] = wpa_s->wps_freq;
wpa_s->after_wps--;
}
if (wps) {
wps_ie = wps_build_probe_req_ie(wps == 2, &wpa_s->wps->dev,
wpa_s->wps->uuid, req_type,
0, NULL, wpa_s->wps->config_methods);
if (wps_ie) {
params.extra_ies = wpabuf_head(wps_ie);
params.extra_ies_len = wpabuf_len(wps_ie);
}
}
#endif /* CONFIG_WPS */
#ifdef CONFIG_P2P
if (wps_ie) {
if (wpabuf_resize(&wps_ie, 100) == 0) {
wpas_p2p_scan_ie(wpa_s, wps_ie);
params.extra_ies = wpabuf_head(wps_ie);
params.extra_ies_len = wpabuf_len(wps_ie);
}
}
#endif /* CONFIG_P2P */
if (params.freqs == NULL && wpa_s->next_scan_freqs) {
wpa_dbg(wpa_s, MSG_DEBUG, "Optimize scan based on previously "
"generated frequency list");
params.freqs = wpa_s->next_scan_freqs;
} else
os_free(wpa_s->next_scan_freqs);
wpa_s->next_scan_freqs = NULL;
params.filter_ssids = wpa_supplicant_build_filter_ssids(
wpa_s->conf, ¶ms.num_filter_ssids);
ret = wpa_supplicant_trigger_scan(wpa_s, ¶ms);
wpabuf_free(wps_ie);
os_free(params.freqs);
os_free(params.filter_ssids);
if (ret) {
wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate AP scan");
if (prev_state != wpa_s->wpa_state)
wpa_supplicant_set_state(wpa_s, prev_state);
wpa_supplicant_req_scan(wpa_s, 1, 0);
}
}
